Biosolids Handling and Incineration Project Basis of Design Report DRAFT

Transcription

1 3900 Euclid Avenue Cleveland OH Biosolids Handling and Incineration Project Basis of Design Report DRAFT October Report Prepared By: Malcolm Pirnie, Inc Superior Avenue Suite 1010 Cleveland OH

2 Table of Contents Contents 1. Introduction Background Existing Conditions Scope of Improvements Technical Memoranda Project Team Process General Biosolids Handling and Incineration Building Dewatering Design Criteria Centrifuge Feed System Centrifuge Feed Pumps Solids Grinders Centrifuge Feed Wet Well Mixing System Dewatering System Centrifuges Horizontal Gate Centrate System Centrate Pump Polymer System Polymer Storage Tanks Polymer Recirculation Pumps Polymer Blending Units Polymer Aging Tanks Polymer Solution Feed Pumps Incinerator Feed Pump System Bin with Sliding Frame Bin Hydraulic Power Unit Incinerator Feed Pumps Twin Screw Feed Auger Incinerator Feed Pump and Feed Auger Hydraulic Power Unit Pipeline Lubrication System Incineration Design Criteria Fluidized Bed Incinerators Fluidized Bed Incinerators Preheat Burner System Preheat Burner Preheat Burner Booster Blower Fluidizing Air Blowers Fluidizing Air Blower Primary Heat Exchangers Primary Heat Exchangers Secondary Heat Exchangers i

3 Table of Contents Secondary Heat Exchangers Air Pollution Control Equipment Venturi/Tray Scrubber Caustic Recirculation Pumps Caustic Storage Tanks Caustic Transfer Pumps Caustic Day Tanks and Feed Pump System Continuous Emissions Monitoring System (CEMS) CEMS Units Purge Air System Purge Air Blower Roof Spray Water System High Pressure Water Pumps Water Spray Nozzles Water Strainers Water Filters Instrument Air System Air Compressors Air Dryers Natural Gas Auxiliary Fuel System (See also Preheat Burner) Natural Gas Guns Sand System Sand Storage Silo Sand Transporter Stack Ash System Ash Slurry Pumps Sand Extraction System Truck Loading Design Criteria Silo with Sliding Frame Silo Hydraulic Unit Extraction Screws Skimmings Design Criteria Skimmings Handling Area Skimmings Feed Pumps Storage Tanks Truck Unloading / Tank Recirculation Pumps Skimmings Grinders Southerly WWTC Skimmings Decant and Storage Facility Easterly WWTP Skimmings Modifications Storage Tank Skimmings Grinders (Existing) Truck Loading Pumps (Existing) Sitework Digester A Sludge Storage Tanks Sludge Storage Tank Mixing SST #7 Mixers SST #8 Mixers SST #9 Mixers SST #10 Mixers ii

4 Table of Contents Biosolids Pumps Biosolids Storage Withdrawal Pumps Sludge Withdrawal Pumps Sludge Storage Transfer Pump Instrumentation and Control General Dewatering Incineration Truck Loading Skimmings Sitework Digester A Sludge Storage Tanks Architectural General Code Review Applicable Codes Occupancy Classification Type of Construction Classification Area and Height Limits (General) Design Standards Best Practices Sustainability/Energy Conservation/Reduced Carbon Footprint Building Exterior Materials Above-grade Wall Construction Roof Construction Doors and Frames Windows and Frames Louvers and Grates Building Interior Materials and Construction Partition Walls Interior Doors Room Construction and Finishes Dewatering Spaces Basement Level Ground Level Second Level Third Level Incineration Spaces Basement Level Ground Level Third Level Truck Loading Spaces Basement Level iii

5 Table of Contents Ground Level Third Level Skimmings Sitework Digester A Sludge Storage Tanks Demolition General Dewatering Incineration Truck Loading Skimmings Southerly Easterly Sitework Digester A Phasing of Demolition of Digester A Facilities Phase 1 Demolition Contract Pipe Rerouting in Phase Electrical and I&C Rerouting in Phase Structural Demolition During Phase Phase 2 Demolition under Biosolids Handling and Incineration Building Construction Contract Demolition of Concrete Structures of Digester A Reinstallation/Relocation of Buried PW Pipe and Fire Hydrant Sludge Storage Tanks Odor Control Units A and B, and VCUs No. 3 and Demolition of Odor Control Buildings A and B Demolition of VCUs No. 3 and Structural General Applicable Codes Material Properties and Design Strengths Reinforced Concrete Reinforced Masonry Structural Steel Aluminum Design Loads Dead Loads Live Loads Hoisting Loads Wind Loads Snow Loads Seismic Loads Lateral Earth Pressures Stability Requirements Foundation Information iv

6 Table of Contents 6.2. Dewatering Incineration Truck Loading Skimmings Sitework Digester A Sludge Storage Tanks Heating, Ventilation and Air Conditioning General Scope of Work Codes and Standards Outdoor Design Parameters Building Heating System Dewatering Centrifuge Feed Pump Room Biosolids Handling Building Basement Incinerator Blower Room Basement Mechanical Room Basement Parts Room Cake Feed Room Electrical Substation Room Electrical MCC Room Centrifuge Room Control Room Communications Room Lockers, Toilet and Shower Rooms Service Support Areas, Future Offices and Lunch Room Incineration Incinerator Areas Truck Loading Truck Loading Area Cake Storage Room Skimmings Skimmings Handling Area Sitework Digester A Sludge Storage Tanks Plumbing General Plumbing Scope of Work Codes and Standards Dewatering Centrifuge Feed Pump Room Dewatering Building Basement, including Skimmings Handling and Polymer Handling Areas Basement Mechanical Room v

7 Table of Contents Cake Feed Room Parts Room, Maintenance Work Areas and Upper Mechanical Rooms Centrifuge Room Laboratory, Lockers, Toilet and Shower Rooms Lunch Room Incineration Incinerator Areas Ash Sump Caustic Storage Area Truck Loading Truck Loading Area Cake Storage Room Skimmings Sitework Digester A Sludge Storage Tanks Fire Protection General Fire Protection Scope of Work Codes and Standards Fire Protection System Locations Dewatering Incineration Truck Loading Skimmings Sitework Digester A Sludge Storage Tanks Odor Control General Existing Odor Control System Odor Sampling New Odor Control System Dewatering Centrifuges Centrifuge Feed Wet Wells Centrate Wet Well Incineration Truck Loading Skimmings Sitework Digester A Sludge Storage Tanks Odor Control Facilities vi

8 Table of Contents 11. Electrical General Overall Power Distribution Electrical Construction Materials - General Dewatering Interior Lighting Exterior Lighting Telecommunication System Fire Alarm System Fire Pump Incineration Power Distribution Equipment Electrical Room Interior Lighting Exterior Lighting Telecommunication System Fire Protection System Truck Loading Lighting Telecommunication System Fire Alarm System Skimmings Lighting Telecommunication System Fire Alarm System Sitework Digester A Sludge Storage Tanks Civil General Location Topography Drainage Existing Structures Proposed Work Dewatering Incineration Truck Loading Skimmings Sitework Access Drives Parking Walkways Grading Plan Storm Drainage Underground Utilities Ash Piping vii

9 Table of Contents Digester A Sludge Storage Tanks Tables Table 1-1. Technical Memoranda Table 2-1. Biosolids Design Criteria Table 2-2. Dewatered Biosolids Design Criteria Table 2-3. Percent Weight on Dry and Ash-Free Basis Table 2-4. Ash Analysis Table 2-5. Air Emissions Factors Table 2-6. Truck Loading Design Criteria Table 2-7. Skimmings Design Criteria Table 7-1. Building Spaces Table 9-1. Building Spaces Table Biosolids Odor Evaluation Results (Odor Units) Table Biosolids Reduced Sulfur Analysis Results (ppm) Table Centrifuge Dewatering Odor Control Ventilation Rate Table Biosolids Handling Building Wet Wells Odor Control Ventilation Rate Table Truck Loading Facility - Storage Silo Odor Control Ventilation Rate Table Skimmings Handling Area - Storage Tanks Odor Control Ventilation Rate Table Sludge Storage Tanks Odor Control Ventilation Rate Table Biosolids Handling and Incineration Building Odor Control Ventilation Rates Summary10-7 Table Design Odor Inlet Concentration and Mass Loadings Table Biofilter Process Parameters Table Biofilter Design Parameters Table Minimum Lighting Levels viii

10 1. Introduction The Basis of Design document for the provides a framework for the processes and facilities that are to be designed and constructed. The Basis of Design is organized into separate sections covering the various work disciplines as follows: Section 2 Section 3 Section 4 Section 5 Section 6 Section 7 Section 8 Section 9 Section 10 Section 11 Section 12 Process Instrumentation and Control Architectural Demolition Structural Heating, Ventilation and Air Conditioning Plumbing Fire Protection Odor Control Electrical Civil Each section is further divided into numbered subsections based on the work area to be discussed. These subsections are as follows (where X denotes the appropriate Section number): Subsection X.1 Subsection X.2 Subsection X.3 Subsection X.4 Subsection X.5 Subsection X.6 Subsection X.7 Subsection X.8 General Dewatering Incineration Truck Loading Skimmings Sitework Digester A Sludge Storage Tanks 1-1

11 Section 1 Introduction 1.1. Background The Southerly Wastewater Treatment Center (WWTC) serves over one-half million people in 45 tributary communities and is the largest of the three plants operated by the (NEORSD or District) to serve the Greater Cleveland area. In addition to its own service area, Southerly also receives and processes solids from the District s Easterly WWTP, raw septage from area sources, and water plant solids from Cleveland s Garrett Morgan Plant. The last significant upgrade of Southerly commenced in the mid 70 s and effectively concluded in the mid 80 s. Among its unique features is a two-stage activated sludge process with effluent filtration to provide an advanced level of treatment. Sludge is thickened, then thermally conditioned (via Zimpro process), dewatered, and incinerated. Since the plant s expansion, the District has conducted various studies to ascertain and improve Southerly s wet-weather treatment capacity, address residuals (grit and screenings) handling issues, as well as improve solids and odor control facilities. Southerly CSO studies identified control projects to Southerly s collection system and touched on consequent impacts to the WWTC from the capture of these additional flows. A recent study of the Zimpro thermal conditioning system concluded that the system should be decommissioned. Additionally, a recent Residuals Management Study has concluded that new fluidized bed incinerators should replace the existing multiple hearth units. Figure 1-1 shows the existing Southerly WWTC site Existing Conditions The current incineration system consists of four multiple hearth incinerators (MHIs). Each MHI is equipped with a waste heat boiler and air emissions control equipment. The biosolids are dewatered by centrifuges and conveyed to the MHIs by cake pumps and conveyor belts. The residual ash from the incinerators is carried in a slurry form through piping south through the Southerly site, across Canal Road, and is deposited into one of the three existing ash lagoons. Southerly currently has the ability to convey dewatered biosolids to a truck loading area to be removed from the plant and disposed at a landfill. 1-2

12 Section 1 Introduction Skimmings are collected from Southerly and Westerly and are trucked to Easterly for disposal in a skimmings-only fluidized bed incinerator there Scope of Improvements The will install three new fluidized bed incinerators (FBIs), each sized to handle 100 dtpd of dewatered biosolids, in a new Incinerator Building. The existing Multiple Hearth Incinerator and Incinerator Auxiliary Buildings and equipment will be decommissioned. Six possible locations for the new Incinerator Building were investigated in TM-115 FBI Location Evaluation. The chosen location was Alternative 3, which locates the new facilities in the footprint of the abandoned Digester A unit. In addition to new incineration equipment, the District determined that it would be desirable to replace the existing dewatering facility with a new Biosolids Handling Building, which will adjoin the new Incinerator Building. The new facility will include centrifuges; a centrate system; a polymer system; a feed well and pumps; intermediate bins; and inclined screw conveyors. The existing Sludge Dewatering Facility and equipment will be decommissioned. Ash from the new incinerators will be captured slurry form by the air pollution control equipment. The resulting ash slurry will be collected in an ash sump in the Incinerator Building and then will be pumped to the existing ash lagoons. Southerly will continue to have the ability to dispose of dewatered biosolids by truck. A new Truck Loading Facility will be constructed. The new facility will include a dewatered biosolids storage silo to enable the plant to store dewatered cake solids prior to trucking. New skimmings handling equipment will also be constructed in the new Biosolids Handling Building. The skimmings handling area will be designed to accept skimmings delivered by truck from Westerly, Easterly, and the Southerly Skimmings Decant and Storage Facility. The skimmings will be pumped and blended with the cake being fed to the fluidized bed incinerators. At Easterly, the skimmings-only fluidized bed incinerator will no longer be required, and will be abandoned. The skimmings truck receiving station at Easterly will be modified to a storage and truck loading station. 1-3

13 Section 1 Introduction 1.4. Technical Memoranda The following table contains a list of technical memoranda that were prepared for this project. Table 1-1. Technical Memoranda TM Number Title Date Issued TM-110 FBI Capacity Evaluation Final 09/13/2006 TM-112 FBI Capacity Analysis Evaluation Southerly WWTC Solids Projection and Peaking Factors Draft Final 09/19/2006 TM-115 FBI Building Location Evaluation Final 07/18/2007 TM-120 Biosolids Characteristics Analyses Draft TM-131 Ash Lagoon Dewatering Improvements Final 01/17/2007 TM-310A Centrifuge Evaluation Final 09/26/2007 TM-315 Skimmings Evaluation Final 09/26/2007 TM-320A Biosolids Conveyance System Final 09/26/2007 TM-320B Dewatered Biosolids Storage Final 09/26/2007 TM-410 Steam System Balance and Incinerator Waste Heat Recovery Study Draft TM-415 Evaluation of Demolition of Boiler No. 1 Final 08/26/2006 TM-510 TCST Reuse Study Final 03/23/2007 TM-515 Odor Control Technology Evaluation Final 09/26/ Project Team This Basis of Design Report is a cooperative effort of the Biosolids Handling and Incineration Project team, which includes: Malcolm Pirnie, Inc Superior Avenue Suite 1010 Cleveland OH

14 Section 1 Introduction CDM 1100 Superior Avenue Suite 620 Cleveland OH DLZ 1000 Rockefeller Bldg 614 West Superior Avenue Cleveland OH MWH 1300 E. 9 th Street Suite 1100 Cleveland OH Resource International 1740 St. Clair Avenue Cleveland OH Tucker, Young, Jackson, Tull 1301 E. 9 th Street Suite 1120 Cleveland OH

15 2. Process The major processes to be described in this Basis of Design Report section include incineration, dewatering, truck loading and skimmings handling. The section is organized as described in the Introduction Section General The process designs will be generally performed in accordance with: Water Environment Federation (1998) Design of Municipal Treatment Plants. Manual of Practice 8, Fourth Edition, Alexandria, Virginia Great Lakes Upper Mississippi River Board (2004) Recommended Standards for Wastewater Facilities (Ten States Standards), Health Education Services, Albany, NY Biosolids Handling and Incineration Building The processes to be described in Sections 2.2 Dewatering, 2.3 Incineration, 2.4 Truck Loading, and 2.5 Skimmings are located within the Biosolids Handling and Incineration Building. This building consists of three parts: the Biosolids Handling Building, the Incineration Building, and the Truck Loading Facility. Figure 2-1 depicts the layout of the biosolids handling processes located in the basement (Floor level B-B) of the Biosolids Handling Building. Figure 2-2 depicts the layout of the biosolids handling processes located on the first floor (Floor B-1) of the Biosolids Handling Building. Figure 2-3 depicts the layout of the biosolids handling processes located on the third floor (Floor B-2) of the Biosolids Handling Building. Figure 2-4 depicts the layout of the incineration processes located in the basement (Floor I-B) of the Incinerator Building. Figure 2-5 depicts the layout of the incineration processes located on the first floor (Floor I-1) of the Incinerator Building Dewatering Design Criteria The dewatering process equipment was based on the information contained in the following tables and from TM-112 Southerly WWTC Solids Projection and Peaking Factors, TM-310A Centrifuge Evaluation, and TM-320A Biosolids Conveyance System. 2-1

16 Section 2 Process Table 2-1. Biosolids Design Criteria Parameter Design Criteria Design Solids Capacity (dtpd) Design Total Solids (%) 4.1 Total Solids Range (%) 3-5 Design Polymer Dosage (lb Active Polymer/Dry Ton Solids) See Figure 2-6 for a flow schematic of the biosolids dewatering system Centrifuge Feed System Thickened primary, excess activated and Easterly biosolids are transported to the centrifuge feed wet well from the Sludge Storage Tanks (SSTs) before being fed to the dewatering equipment. See Section 2.8 for a description of the SST area. The centrifuge feed wet well is divided to allow maintenance of one section while continuing to feed from the second section Centrifuge Feed Pumps There will be ten centrifuge feed pumps withdrawing from the centrifuge feed wet wells. There will be a dedicated pump to each of the eight centrifuges. Two additional pumps are provided as standby units (one per four pumps) and will be piped to allow it to feed any of four centrifuges. Number: Ten (10) Location: Centrifuge Feed Pump Room Type: Progressing Cavity Manufacturer: Moyno, Netzsch, or equal Model: 2000, Nemo Design Flow: 275 gpm Motor Size: 40 hp Drive: VFD Solids Grinders Each of the centrifuge feed pumps will have a dedicated solids grinder to reduce the size of material being fed to the centrifuge, thereby reducing blockage. Number: Ten (10) Location: Centrifuge Feed Pump Room Manufacturer: Moyno, JWC, or equal Model: Annihilator, Muffin Monster Design Flow: 275 gpm Motor size: 3 hp 2-2

17 Centrifuge Feed Wet Well Mixing System Section 2 Process Each of the two centrifuge feed wet wells have a mixing system to keep the solids in suspension and as homogeneous possible. The mixing system will be designed to resuspend solids if the mixing system is off for a period of time. This will allow the mixing system to be either continuous or intermittent as decided by the operator. Since the mixing system is not a critical (must have) necessity for processing the biosolids, the only redundancy is provided by each half of the centrifuge feed wet well having a mixing system. Number: Two (2) Location: Centrifuge Feed Pump Room Type: Pump Mix Manufacturer: Vaughan, Liquid Dynamics Model: Rotamix, JetMix Motor Size: 40 hp Dewatering System Solids dewatering will be accomplished by dewatering high-solids (high g-forces) centrifuges. Each centrifuge will receive thickened solids and polymer solution. The dewatered cake will discharge from the centrifuge and enter the incinerator feed pump system described in Section Centrifuges Eight centrifuges will be provided. Six centrifuges would be needed to provide the dewatered solids capacity of three operating incincerators (300 dtpd) see Section 2.3. Two additional centrifuges are provided for redundancy, however, could be used for dewatering solids for disposal by trucks in the event of high solids. Number: Eight (8) Location: Centrifuge Area Manufacturer: Andritz, Alfa Laval, Westfalia, or equal Model: D7LL (Andritz) Capacity: 50 DTPD Motor Size: 375 hp Drive: VFD Upon centrifuge start-up, the dewatered cake exiting the centrifuge must be diverted until it is of a high enough concentration (28 %+)that the incineration process is not impacted. The start-up diversion method will be a horizontal gate. As described in paragraph , centrate will drain until the torque on the centrifuge indicates an acceptable concentration at which time the flush water will stop and the gate will open allowing the dewatered cake to drop directed to the associated bin as part of the incineration feed pump system. 2-3

18 Section 2 Process Horizontal Gate Each centrifuge will have a horizontal gate located on its solids discharge end. The dedicated gate will be closed and will flush the lower concentration cake into the centrate drain. Number: Eight (8) Location: Cake Pump Area Manufacturer: Supplied by centrifuge manufacturer Centrate System Centrate (and dewatered cake at centrifuge start-up) will be conveyed to the Centrate Wet Well and then pumped to the head of the plant as a recycle stream Centrate Pump Two centrate pumps will be provided to handle the possible wide variation in flow (dependent upon number of centrifuges in operation) with the third pump being provided as a standby unit. Number: Three (3) Location: Biosolids Handling Building Basement Type: Torque Flow Recessed Impeller Manufacturer: Wemco, or equal Speed: Model C Design Flow: Motor Size: 75 hp Drive: Direct drive It is being investigated if the centrate can be directly discharged to the waste liquor stream, thereby avoiding any pumping Polymer System The plant will receive neat polymer in emulsion form by truck delivery. The polymer will be diluted with potable water and activated by rigorous mixing followed by aging before the polymer solution is dosed to the centrifuge feed. See Figure 2-7 for a schematic of the polymer system Polymer Storage Tanks The polymer storage tank will receive and store the 42% active emulsion polymer. The tanks provide 30 days of storage under future average biosolids production conditions of dtpd. This volume is provided by two tanks to allow for repair of one, if necessary and still remain in service. 2-4

19 Section 2 Process Number: Two (2) Location: Polymer Area Capacity: 12,000 gallons Material: Fiberglass reinforced plastic (FRP) Polymer Recirculation Pumps The polymer recirculation pumps provide mixing for the emulsion polymer. There is one pump per storage tank with a common shared pump as standby. Number: Three (3) Location: Polymer Area Type: Progressing Cavity Manufacturer: Moyno, Netzsch, or equal Design Flow: 20 gpm Motor Size: 3 hp Polymer Blending Units Three blending units are provided, two in operation with one standby. The two units will provide a 0.5% solution from the neat (as delivered) polymer for future peak week solids production. Number: Three (3) Location: Polymer Area Manufacturers: Siemens; Fluid Dynamics Inc., Velodyne, LLC, or equal Model: PolyBlend, DynaBlend, VeloBlend Neat Polymer Capacity: 1-20 gph Dilution Water Capacity: gpm Motor Size: 1.5 hp Polymer Aging Tanks The two polymer aging tanks will alternate, fill and drain, to allow diluted polymer 45 minutes of aging prior to feeding to the centrifuges. Number: Two (2) Location: Polymer Area Capacity: 4,500 gallons Material: FRP Polymer Solution Feed Pumps There are ten polymer solution pumps, one dedicated to each of the eight centrifuges with two units providing standby capability. Number: Ten (10) Location: Polymer Area Type: Progressing Cavity Pump 2-5

20 Section 2 Process Manufacturer: Moyno, Netzsch, or equal Capacity: 4-40 gpm Motor Size: 5 hp Incinerator Feed Pump System Dewatered solids cake will be conveyed to the fluidized bed incinerators by hydraulically driven piston pumps. The centrifuge will discharge dewatered cake into an intermediate storage bin with a sliding frame. There is one bin for every two centrifuges and every two incinerator feed pumps. See Figure 2-8 for an incinerator feed schematic. The schematic shows the piping from the individual feed pumps to the incinerators Bin with Sliding Frame Each bin is provided with a sliding frame which moves the cake solids to the bin outlet dropping into the auger inlet of each of the two incinerator feed pumps. The sliding frame of the intermediate storage bin is hydraulically operated from a hydraulic power unit. Number: Four (4) Location: Cake Pump Area Size: 15-feet diameter by 6 feet high Bin Hydraulic Power Unit The hydraulic power unit contains a motor, a small oil pump, and an oil reservoir. Number: Four (4) Location: Cake Pump Area Manufacturer: Schwing Bioset, or equal Pump Type: Axial Piston Pump Motor size: 40 hp Reservoir size: 60 gallons Incinerator Feed Pumps Each of the four storage bins has two dedicated incinerator feed pumps. The incinerator feed pumps each will have two discharge pipes to allow each cylinder to pump the desired amount of cake to a specific incinerator inlet. Number: Eight (8) Location: Cake Pump Area Type: Hydraulically Driven Piston Pumps Manufacturer: Schwing Bioset, or equal Model: KSP 45 V(HD) Design Flow: 64 gpm at 26-35% solids 2-6

21 Section 2 Process Design Pressure: 1200 psi Twin Screw Feed Auger The twin screw feed auger is under the storage bin to accept dewatered cake solids and convey them into the incinerator feed pumps. Number: Eight (8) Location: Cake Pump Area Manufacturer: Schwing Bioset, or equal Model: SD 350 HD Incinerator Feed Pump and Feed Auger Hydraulic Power Unit Both the piston cake pump and the twin screw feed auger are powered by a hydraulic power unit. The hydraulic power unit contains one motor and two oil pumps, one for the piston pump and one for the corresponding feed auger. The hydraulic power unit also contains an oil reservoir. Number: Eight (8) Location: Cake Pump Area Manufacturer: Schwing Bioset Model: 800L Pump Type: Axial Piston Pump Motor Size: 200 hp Oil Reservoir Size: 210 gallons Pipeline Lubrication System The pressure in the incinerator feed pipelines is reduced by introducing a boundary layer of clean water after bends in the pipe by means of a pipeline lubrication system. Number: Eight (8) Location: Cake Pump Area Pump Type: Diaphragm Motor Size: 5 hp 2.3. Incineration Refer to Figure 2-9 for the incineration process flow diagram. The diagram shows the incineration auxiliary equipment along with the air pollution control equipment. There are three identical incinerator trains Design Criteria The incineration process and the air pollution control equipment were designed based on the information in the following tables, from TM-120 Biosolids Characteristics Analyses. 2-7

22 Section 2 Process Table 2-2. Dewatered Biosolids Design Criteria Parameter Dewatered Biosolids Design Total Solids (%) 30 Total Solids Range (%) Design Volatile Solids (% TS) 62 Volatile Solids Range (% TS) Design Higher Heating Value (Btu/lb VS) 10,500 Higher Heating Value Range (Btu/lb VS) 9,500-12,000 Hydrogen % Table 2-3. Percent Weight on Dry and Ash-Free Basis Carbon % Nitrogen % Sulfur % Oxygen % Chlorine % Average Maximum Minimum Al % Ca % Table 2-4. Ash Analysis Percent Weight on Ash Basis Fe % K % Si % Na % P % Initial Deformation Reducing F Oxidizing F Average ,003 2,066 Maximum ,042 2,148 Minimum ,915 1, Fluidized Bed Incinerators The fluidized bed incinerators will be a hot windbox design capable of autogenously (at 28%) incinerating 100 dry tons per day (dtpd) of dewatered biosolids. TM-110 FBI Capacity Evaluation evaluated the various incinerator sizes and concluded that the 100 dtpd capacity was the optimal capacity for three units. There will be a total of four feed ports in each incinerator. Each FBI vessel will consist of a carbon steel shell lined on the inside with refractory brick and insulating materials. A refractory arch supports the sand bed and separates the 2-8

23 Section 2 Process windbox from the remainder of the vessel. The arch has tuyeres to allow the hot fluidizing air from the windbox into the sand bed. The sand bed is made up of approximately 30 in. of sand. When the bed is fluidized, the height of the sand bed increases to 55 to 60 in. The space above the sand bed is the freeboard. The volume of the freeboard is designed to allow for sufficient residence time for combustion to be completed, as well as provide time for particles to drop out of the exhaust gas flow stream and remain in the FBI vessel. At the top of the vessel is the exhaust gas outlet proceeding to the primary heat exchanger Fluidized Bed Incinerators The fluidized bed incinerators will be hot windbox design with a shell temperature of F. Personnel protection will be provided in areas of possible contact with expanded metal screens. The auxiliary fuel system will be natural gas lances located near the bottom of the sand bed above the refractory arch. Number: Three (3) Location: Incinerator Building Capacity: 100 dtpd Design Windbox Temperature: 1250 F Design FBI Bed Temperature: 1500 F Design FBI Outlet Temperature: 1600 F Minimum Inside Diameter at Top of Freeboard: 26 feet Minimum Inside Diameter at Sand Bed: 15 feet Minimum Freeboard Residence Time: 10 seconds Design Shell Temperature: 200 F Preheat Burner System There will be one preheat burner for each FBI, located on the outside of the windbox. The preheat burner will be designed to operate on natural gas. The preheat burner will be used for a cold startup of the FBI. The sand bed must be heated by the preheat burner to a sufficient temperature to allow for the natural gas auxiliary fuel to combust in the bed Preheat Burner Number: Three (3) (one per FBI) Location: Incinerator Building Manufacturer: North American Type: Natural Gas, Low NOx Design Output: 23 million Btu/hr The preheat burner will receive air from a connection from the fluidizing air blower outlet ductwork. This air will be increased in pressure by a preheat burner booster blower. 2-9

24 Section 2 Process The pressure of this air will be approximately 1.5 psi higher than the pressure in the windbox (~6 psig) Preheat Burner Booster Blower Number: Three (3) (one per Preheat Burner) Location: Biosolids Handling Building, Incinerator Blower Room Manufacturer: Continental, Spencer, or equal. Design Flow: 4000 scfm Design Pressure: boost pressure from 6 to 7.5 psig Speed: 3600 rpm Motor size: 75 hp Drive: Direct Fluidizing Air Blowers Each FBI train will include a fluidizing air blower. The fluidizing air blower will be a motor-driven, multi-stage centrifugal type. The blower will supply both the air required to fluidize the sand bed and also the combustion air for the incineration process. The blower will also provide air to the preheat burner during FBI startup. The inlet of the blower will be connected by ductwork to an air filter. The air will either be from inside the Incinerator Building or outside. The outlet side of the blower will be connected by ductwork to the primary heat exchanger Fluidizing Air Blower Number: Three (3) Location: Biosolids Handling Building, Incinerator Blower Room Type: Multi-stage centrifugal, direct driven Manufacturer: Continental, Spencer, or equal. Design Airflow: 15,000 scfm Design Pressure: 6 psig Speed: 3600 rpm Motor size: 700 hp Drive: Direct Primary Heat Exchangers Each FBI train will include a primary heat exchanger. The primary heat exchanger is used to transfer the heat of the FBI exhaust gases into the fluidizing air to preheat the air prior to discharging it into the windbox. The heat exchanger will be a shell and tube, counter flow type, with the hot FBI exhaust gases passing through the tubes, and the fluidizing air passing through the shell. The heat exchanger will contain a bypass duct and damper system to allow up to 50% of the fluidizing air to be bypassed around the heat exchanger thereby controlling preheat temperature of the fluidizing air between 900 F and 1250 F, yet still provide cooling to the heat exchanger tubes, thus protecting them from overheating. 2-10

25 Section 2 Process Primary Heat Exchangers Number: Three (3) (one per FBI train) Location: Incinerator Building Manufacturer: Alstom Minimum Tube Surface Area: 5300 sq. ft. Flue Gas Side: Design Airflow: 22,000 scfm Design Pressure Drop: Inlet Temperature Range: 1500 F to 1650 F Outlet Temperature Range: 1000 F to 1200 F Cleaned Gas Side: Design Airflow: 13,500 scfm Design Pressure Drop: 16 in. w.c. Inlet Temperature: 60 F to 1650 F Outlet Temperature Range: 900 F to 1250 F Secondary Heat Exchangers Each FBI train will include a secondary heat exchanger. The heat exchanger is used to transfer the heat of the FBI exhaust gases into the exhaust from the air emissions equipment prior to discharging it in the stack. This increase in temperature will prevent a visible plume from forming when the exhaust is released into the atmosphere. The heat exchanger will be a shell and tube, counter flow type, with the hot FBI exhaust gases passing through the tubes, and the air emissions exhaust passing through the shell. Stack gases will exit at F Secondary Heat Exchangers Number: Three (3) (one per FBI train) Location: Incinerator Building Manufacturer: Alstom Minimum Tube Surface Area: 1200 sq. ft. Flue Gas Side: Design Airflow: 22,000 scfm Design Pressure Drop: Inlet Temperature Range: 1500 F to 1650 F Outlet Temperature Range: 1000 F to 1200 F Air Side: Design Airflow: 13,500 scfm Design Pressure Drop: 16 in. Inlet Temperature: 60 F to 1650 F Outlet Temperature Range: 900 F to 1250 F 2-11

26 Section 2 Process Air Pollution Control Equipment The following maximum emissions factors (from the Permit to Install sent to the City of Cleveland Division of Air Quality in December 2006) will be provided to the potential FBI suppliers for use in the design of air pollution control equipment. Pollutant Table 2-5. Air Emissions Factors FBI Emission Factor (lbs/dry ton) CO 1.7 NOx 3.75 SO PM 0.4 PM VOC 0.7 The air pollution control equipment design is expected to be a wet patented scrubbing system which combines the venturi and tray scrubber functions within one vessel. The scrubber system will also include a pre-cooler system for cooling the water to adiabatic temperature prior to entering the venturi/tray scrubber system Venturi/Tray Scrubber Number: Three (3) (one per FBI train) Location: Incinerator Building Manufacturer: Venturi Pak, Ringjet Design Flow Range: 22,000 scfm Design Inlet Temperature: 900 F to 1100 F Maximum Design Pressure Drop: 40 in. w.c. Maximum Water Usage: 1100 gpm The tray portion of the scrubber will include one tray for a caustic system for removing SO2 from the exhaust. There will be a day tank for each tray scrubber with water recirculation. There will be one common chemical storage tank. Caustic will be added to the water as needed to maintain the proper ph. Make up water will also be added to the system to allow continuous blow down of solids from the circulating system Caustic Recirculation Pumps Number: Six (6) (two per FBI train, one operating and one standby) Location: Incinerator Building Type: Horizontal, single stage, end suction centrifugal Design Flow: 1 to 10 gpm Design Pressure: 20 psi 2-12

27 Section 2 Process Discharge of the blow down solids containing water from the caustic section of the tray scrubber flows to the ash sump Caustic Storage Tanks Two caustic storage tanks are provided to share the delivered caustic solution. The solution will be stored at 25% solution making the tanks larger but avoiding heat tracing which would be required if 50% solution were being stored. Two tanks will provided for 30 days storage at future average conditions. Number: Two (2) Location: Incinerator Building Capacity: 25,000 gallons Material: Carbon Steel Caustic Transfer Pumps Four pumps will be provided, one operating and one standby per caustic storage tank. Number: Four (4) Location: Incinerator Building Type: Peristaltic Pump Manufacturer: Watson-Marlow Capacity: 10 gpm Motor Size: 2 hp Caustic Day Tanks and Feed Pump System Three systems will be supplied, one for each incinerator train. The system will be operated to maintain a ph set point within the recirculating scrubber tray water for SO 2 control. Number: Three (3) systems, one per FBI train Location: Incinerator Building Tanks: 500 gallon polypropylene tank Pumps: 1/3 hp, 120 volt peristaltic pump with a capacity of 0.2 to 1 gpm Continuous Emissions Monitoring System (CEMS) A Continuous Emissions Monitoring System (CEMS) unit will be installed on each incinerator stack CEMS Units Number: Three (3) (one per FBI train) Location: Incinerator Building, mounted on stacks Manufacturer: Thermo Electron Corporation, or equal Monitored Components: O 2, CO, and temperature (or moisture) 2-13

28 Section 2 Process Purge Air System The purge air system will include four purge air blowers. The purge air blowers will be motor-driven, rotary positive displacement type. The inlets of the blowers will be connected by ductwork to an air filter. The air will either be from inside the Incinerator Building or outside. The outlet sides of the blowers will be connected by piping to the following connection points: Hot Gas Expansion Joint, between FBI and Primary Heat Exchanger (One per FBI) Hot Air Expansion Joint, between Primary Heat Exchanger and FBI (One per FBI) Hot Gas Expansion Joint, between Secondary Heat Exchanger and Venturi Scrubber (One per FBI) Windbox Viewports (One per FBI) Freeboard Viewports (One per FBI) Top Viewports (One per FBI) Pre-cooler nozzles (One per FBI train) Gas guns (Twenty per FBI) Biosolids feed nozzles (Four per FBI) Spray nozzle inlets (Six per FBI) Purge Air Blower Number: Four (4) (One for each FBI and one spare) Location: Incinerator Building, Blower Room Type: rotary positive displacement Manufacturer: Hibon, or equal Design Flow: 600 scfm Design Pressure: 8 psig Motor size: 25 hp Drive: Constant speed Roof Spray Water System The roof spray water system equipment design will include the following: High Pressure Water Pumps Number: Six (6) (Two for each FBI, one operating and one standby) Location: Incinerator Building Type: Turbine Design Flow: 16 gpm Design Discharge Pressure: 300 psig 2-14

29 Section 2 Process Motor Size: 20 hp Water Spray Nozzles Number: Six (6) per FBI unit Location: Incinerator Building Design Flow: 2.1 gpm Design Pressure: 300 psig Water Strainers Number: Six (6) (one per water pump) Location: Incinerator Building Design Flow: 18 gpm Design Pressure: 300 psig Water Filters Number: Two (2) Location: Incinerator Building Design Flow: 54 gpm Design Pressure: 70 psig Instrument Air System The instrument air system equipment design will include the following: Air Compressors Number: Two (2) Location: Incinerator Building Manufacturer: Elwing, or equal Design Flow: 300 scfm Design Pressure: 100 psig Air Dryers Number: Two (2) Location: Incinerator Building Design Flow: 300 scfm Design Pressure: 100 psig Instrument air will be connected by piping to the following: Windbox pressure ports (One per FBI) Bed pressure ports (One per FBI) Freeboard pressure ports (One per FBI) Spray water nozzles (Six per FBI) Primary Heat Exchanger pressure ports (One per FBI) 2-15

30 Section 2 Process Secondary Heat Exchanger pressure ports (One per FBI) Venturi Scrubber pressure ports (One per FBI) Oxygen Analyzer (One per FBI) CEMS (One per FBI) Sand transport system Natural Gas Auxiliary Fuel System (See also Preheat Burner) The incinerators will have a natural gas auxiliary fuel system. The system will include the following: Natural Gas Guns Number: Twenty (20) per FBI Location: Incinerator Building, bottom of sand bed on top of refractory arch Design Flow: 20 scfm each Design Pressure: 15 psig Sand System There will be one sand storage silo in the Incinerator Building, which will be able to feed sand to the bed of all three FBIs. The sand will be delivered by truck to a unloading station located on the outside of the Incinerator Building Sand Storage Silo Number: One (1) Location: Incinerator Building Design Capacity: The sand storage silo will have a filter which will be used during silo operation Sand Transporter Number: One (1) Location: Incinerator Building The sand transporter will be connected by piping to one port in each FBI unit. The piping will include connections to instrument air to assist in delivery. Sand will be metered as it is delivered to each FBI by a rotary valve Stack The exhaust from the tray scrubber will exit the building through the stack. There will be one stack per FBI train. The stack will be constructed of stainless steel, and will be 3 ft. in diameter and 110 ft. tall. Each stack will have two 6-inch sampling ports, located 90 apart for regulatory emission testing. A third 6-inch port will be provided for gaseous sampling. If these ports are located above the roof or convenient floor location a six feet wide sampling platform and ladder will be provided. 2-16

31 Section 2 Process Ash System Ash from the biosolids will be carried by the exhaust gases out of the top of each FBI. Ash will be removed from the exhaust gas in the air scrubbing system. Ash, along with the water from the air scrubbing equipment, will form a slurry and will flow to the ash sump. Two pumps will be used to pump the ash slurry out of the building and into the ash piping. The piping will carry the ash slurry to the existing ash lagoons for settling. Mixing may be required in the ash sump to keep the solids suspended Ash Slurry Pumps Number: Three (3), two operating and one standby Location: Incinerator Building Design Flow: 2300 gpm Design Pressure: 30 psi Sand Extraction System Sand extraction will be done manually with a vacuum type truck upon cool down of the incinerator. Therefore no equipment is provided for this operation Truck Loading The Biosolids Handling Building will include a truck loading system for times when incineration capacity is not sufficient or not available. The truck loading system will also provide dewatered biosolids storage Design Criteria The dewatering process equipment was based on the information contained in the following tables and from TM-112 Southerly WWTC Solids Projection and Peaking Factors, and TM-320B Dewatered Biosolids Storage. 2-17

32 Section 2 Process Table 2-6. Truck Loading Design Criteria Parameter Design Criteria Design Storage Capacity (dry tons) 64 Design Total Solids (%) 30 Total Solids Range (%) Silo with Sliding Frame The silo sliding frame is located inside the storage silo, operated by a hydraulic cylinder, to plow or rake the solids into the extraction screws for truck loading. Number: One (1) Location: Truck Loading Facility Manufacturer: Schwing Bioset, or equal Capacity: 6,600 cu. ft. Size: 21 dia x 21 tall Silo Hydraulic Unit Number: One (1) Location: Truck Loading Facility Manufacturer: Schwing Bioset, or equal Pump Type: Piston Pump Motor Size: 40 hp Reservoir Size: 60 gallons Extraction Screws Number: Three (3) Location: Truck Loading Facility Manufacturer: Schwing Bioset, or equal Motor Size: 30 hp Dewatered biosolids are removed from the storage silo by extraction screw conveyors. The silo has three screw conveyors with discharge chutes to load a truck evenly with minimal maneuvering from the truck. The sliding frame in the storage silo is powered by a hydraulic power unit. The unit contains a piston oil pump and an oil reservoir Skimmings Design Criteria The skimmings system process equipment was based on the information contained in the following table and from TM-112 Southerly WWTC Solids Projection and Peaking Factors and TM-315 Skimmings Evaluation. The skimmings will be intermittently 2-18

33 Section 2 Process delivered to the skimmings handling area from the three NEORSD treatment plants. The skimmings will be processed (decanted further if necessary), stored and ultimately fed to the incinerator feed pumps where it is blended with the cake solids and fed into the incinerators. Table 2-7. Skimmings Design Criteria Parameter Design Criteria Design Capacity (dtpd) Skimmings Handling Area Skimming generated at all three plants will be delivered to the skimmings handling area of the Biosolids Handling Building by truck. The skimmings will be unloaded and stored in the skimmings storage tanks and fed into the biosolids process stream at the cake pumps for incineration in the fluidized bed incinerators Skimmings Feed Pumps Number: Four (4) Location: Skimmings Handling Area, Biosolids Handling Building Type: Progressing Cavity Manufacturer: Moyno, Netzsch, or equal Design Flow: 2 gpm Motor Size: 2 hp Drive: Direct drive with VFD Storage Tanks Two storage tanks are provided for storing received skimmings. One tank is sufficient to receive a truck load of skimmings. The tanks will be heat traced and kept at a temperature of 120 to 140 F. Number: Two (2) Location: Skimmings Handling Area, Biosolids Handling Building Capacity: 10,000 gallons Material: Steel Truck Unloading / Tank Recirculation Pumps Two pumps will be provided to serve with unloading the skimmings from the delivery truck as well as used to keep the tank contents mixed. A third pump is used for drawing off (underflow) water when further decanting of the skimmings is desired. Number: Three (3) Location: Skimmings Handling Area, Biosolids Handling Building Type: Progressing Cavity 2-19

34 Section 2 Process Manufacturers: Moyno, Netzsch, or equal Design Flow: 350 gpm Motor Size: 40 hp Drive: Direct drive constant speed Skimmings Grinders Skimmings grinders are provided to macerate the skimmings for easier handling. One grinder is provided for each recirculation pump. Number: Two (2) Location: Skimmings Handling Area, Biosolids Handling Building Manufacturer: Moyno, JWC, or equal Design Flow: 350 gpm Motor Size: 3 hp Southerly WWTC Skimmings Decant and Storage Facility No modifications are required to Southerly s existing Skimmings Decant and Storage Facility. Skimmings will be loaded onto a truck and hauled to the new skimmings handling area in the Biosolids Handling Building Easterly WWTP Skimmings Modifications The existing Easterly Skimmings Handling Facility will be modified to convert Easterly from a skimmings receiving plant, to a skimmings hauling plant. Minimal modifications are required for the conversion. It is anticipated that the existing Grease Storage Tank will need to be replaced prior to Easterly s skimmings modifications. If that is the case, a new Skimmings Storage Tank will be required to hold Easterly s skimmings until they can be loaded onto a truck. If the existing Grease Storage Tank is not replaced prior to the Easterly Modifications, the two existing day tanks may be used for this purpose. The Basis of Design assumes a new tank Storage Tank Number: One (1) Location: Easterly Skimmings Handling Area Capacity: 10,000 gallons Material: Steel Easterly s Skimmings Handling Facility will require moderate piping modifications to convey skimmings from the existing concentrators to the new storage tank and again from new storage tank to a truck (instead of from a truck). The current pumps and grinders may be re-used for this purpose. 2-20

35 Section 2 Process Skimmings Grinders (Existing) Number: Two (2) Location: Easterly Skimmings Handling Area Manufacturer: Moyno Model: Annihilator Design Capacity: 350 gpm Truck Loading Pumps (Existing) Number: Two (2) Location: Easterly Skimmings Handling Area Manufacturer: Moyno Model: Annihilator Design Capacity: 350 gpm 2.6. Sitework See Section 12 Civil for sitework to be performed for this project Digester A See Section 5 Demolition for related process piping modifications related to Digester A demolition Sludge Storage Tanks Two Sludge Storage Tanks (SSTs #8 and #9) are currently used for storing liquid biosolids until they are pumped to the Thermal Conditioning Process. Under this project, these tanks will continue to be used on a daily basis for storing liquid biosolids until they are pumped to the Centrifuge Feed Wet Well in the new Biosolids Handling Building. In addition, SSTs #7 and #10 will be rehabilitated to store biosolids during peak production periods. The process piping from the SSTs to the Centrifuge Feed Wet Wells is shown on Figure The existing mixing equipment, and the improvements to SST #7 are shown on Figure Sludge Storage Tank Mixing SSTs #8, #9 and #10 are equipped with five mixers per tank. SST #7 does not have mixing equipment. Mixing of the stored biosolids is required to keep the solids in suspension and to prevent them from going septic. Under this project, the existing mixers in SSTs #8, #9 and #10 will be reused, and new mixers equipment will be installed in SST #7. The mixers are only used when a tank contains more than 14 ft. of biosolids. 2-21

36 Section 2 Process SST #7 Mixers Number: Five (5) Location: SST #7 Manufacturer: Chemineer Motor Size: 75 hp Motor Enclosure: TEFC SST #8 Mixers Number: Five (5) existing Location: SST #8 Manufacturer: Chemineer Motor Size: 75 hp Motor Enclosure: TEFC SST #9 Mixers Number: Five (5) existing Location: SST #9 Manufacturer: Chemineer Motor Size: 75 hp Motor Enclosure: TEFC SST #10 Mixers Number: Five (5) existing Location: SST #10 Manufacturer: Chemineer Motor Size: 10 hp Motor Enclosure: TEFC Biosolids Pumps The central control chamber of the SSTs houses four TC Withdrawal Pumps, one Sludge Storage Transfer Pump, and six Sludge Withdrawal Pumps. The TC Withdrawal Pumps are used to pump biosolids from SSTs #8 and #9 to the Thermal Conditioning System wet well. The Sludge Withdrawal Pumps can be used to pump biosolids from SSTs #7, #10, #11 or #12 to the Thermal Conditioning System wet well. They can also be used to recirculate biosolids within the tanks. The Sludge Storage Transfer Pump can also be used to pump biosolids from SSTs #8 and #9 to the Thermal Conditioning System wet well. In addition, it can be used to pump biosolids from SST #7 to SST #8 or # Biosolids Storage Withdrawal Pumps Under this project, two new pumps will be installed to replace the TC Withdrawal Pumps #1, #2, and #

37 Section 2 Process Number: Two (2) Location: Sludge Storage Tanks Control Chamber Type: Centrifugal Sludge Withdrawal Pumps The Sludge Withdrawal Pumps will remain in place for use as recirculation pumps. Pump mixing is used when an SST contains less than 14 ft. of biosolids. Number: Six (6) existing Location: Sludge Storage Tanks Control Chamber Manufacturer: Allis-Chalmers Type: Centrifugal Capacity: 700 gpm at 62 ft. TDH Sludge Storage Transfer Pump The Sludge Storage Transfer Pump will remain in place for use as a transfer pump from SST #7 to SSTs #8 and #9. Number: One (1) existing Location: Sludge Storage Tanks Control Chamber Manufacturer: Wemco Capacity: 650 gpm at 80 ft. TDH 2-23

38 3. Instrumentation and Control 3.1. General The control system for the incineration and dewatering complex will be a distributed control system utilizing programmable logic controller (PLC) hardware. There will be a dedicated PLC for each major process system: the incinerators, the equipment common to the incinerators, the sand system, the dewatering equipment, the common dewatering equipment, and the continuous emissions monitoring system (CEMS). The PLC hardware will be the Allen-Bradley ControlLogix PLC and will incorporate the available technology of the system. The PLCs will monitor the process equipment and execute the operational commands issued by the operator through the human machine interface (HMI) through the Ethernet network when the equipment is in automatic. See Figure 3-1 for the Configuration Diagram. Local control, primarily for maintenance, training, and testing use will also be available for most equipment. Information regarding the operation of the process equipment including alarms will be viewable through the HMI. The HMI will also provide a window into the operational status of the dewatering and conveyance equipment, as well as the continuous emission monitoring system (CEMS). The HMIs will also interface with the existing plant SCADA (Supervisory Control and Data Acquisition) system. Modifications to the existing SCADA software or HMI graphics for process equipment outside the contract area will not be made. The process equipment will be provided with main control panels located in electrical rooms. The electrical rooms will also house the PLC panels, motor control centers, and stand alone starters. These electrical rooms will be ventilated and temperature controlled to allow safe use of the equipment. The computer equipment, including network panels and HMI equipment, will be located in the control room. All instrumentation and control work will be designed in accordance with the NEORSD Standards and Conventions Manual. The existing NEORSD control system configuration and control philosophy varies by process area and type of equipment but generally consists of the following components: Local manual control devices at the motor. Manual/Automatic control selection at one or more remote locations: Hand-Off-Auto selector switch at the MCC. 3-1

39 Local off- Remote selector switch at the area control panel. Section 3 Instrumentation and Control Manual-Off-Auto (or similar) at the local control panel or variable frequency drive. A series of networked PLCs and HMI computers for remote (distributed) manual and automatic control. Remote manual control of equipment through the HMI based on operator commands. Automatic control of equipment based on operator entered setpoints and measured process conditions. The recommended function of the instrumentation system components for the incineration and dewatering facility are as follows: Programmable Controllers (PLCs): The PLCs will perform the data acquisition and process control functions. PLCs or PLC input/output (I/O) components will be distributed throughout the area, in each major process location. The PLCs will be programmed to be stand alone units that will control the associated process equipment, even if the communication between the PLC and the HMI is severed. The PLC system will be controlled by the OIT. If the OIT connection to the PLC is severed, then the equipment associated with that PLC will go through a controlled shutdown. HMI Computers: The HMI computers will be the operator s primary window into the process. At the HMI computers, process graphic displays will provide detailed, userfriendly information on all equipment and will allow operators to initiate process changes or respond to event and alarm conditions. The HMI provides information and requests to the PLC for control, but the computer does not have direct control of the process equipment. The HMI applications for the Incineration and Dewatering process will be integrated together. The recommended control philosophy includes local control at the equipment for maintenance or emergency use and remote manual and automatic control from the HMI for normal use. Local Control: All equipment will have local manual control capability at or near the equipment. Equipment that can also be controlled remotely by the PLC will have a Local-Off-Remote selector switch at that piece of equipment to select control location. If the selector switch is in the Local position, the local manual control will be enabled, and the remote control from the PLC/HMI will be disabled. Remote Control: When the Local-Off-Remote selector switch is in the Remote position, the PLC control will be enabled, and the local manual control will be disabled. The PLC will control the equipment in either a remote manual or an automatic mode of operation, as selected at the HMI. 3-2

40 Section 3 Instrumentation and Control PLC Manual Control: The PLC Manual mode of control requires operator action at the HMI to change the operating status of the equipment. PLC Auto Control: The PLC Auto control allows the PLC to control the equipment based on operator-entered set points and measured values. The control system will interface and share data with the existing SCADA system. The communication network in the incineration and dewatering complex will be provided with managed switches that communicate at 100 Mb /1Gb speeds. This will provide for improved SCADA network bandwidth integrated with improved product availability and manufacturer support. Specific conditions will be identified that will be cause for an alarm; all other conditions will be events. Emissions problems will cause an event but will not cause equipment to shut down. A pre-qualified system integrator belonging to and certified by the National Group of Integrators will be specified to perform the work. The performance history and work experience with the District will be considered in the pre-qualification process of the control system integrator Dewatering The dewatering process equipment will be specified with stand alone control panels and operator interface equipment. These panels, with their manufacturer provided PLCs, will control the operation of the centrifuges and provide operational and status data to the control system as well as accept inputs from the network. Each centrifuge will operate independently and will process dewatered biosolids at the rate requested to meet the needs of the incineration system. Each centrifuge will be specified with its own PLC and control system. The centrifuge controls will be monitored by the SCADA system. Detailed equipment control of the centrifuges will be executed using the logic programmed by the manufacturer. The dewatering PLC will provide the required feed rate per centrifuge and monitor the supply and discharge status. This PLC will also monitor and control the chemical feed pumps. The dewatering PLC will generate the events and alarms and interface the manufacturer centrifuge panels into the SCADA system Incineration The control system for each incinerator will be stand-alone. Each incinerator will be provided with the necessary hardwired panels to comply with safe operation and shutdown requirements of NFPA. Each incinerator will have burner control panels and equipment to control the preheat burner and natural gas system, as well as control 3-3

41 Section 3 Instrumentation and Control equipment for the dewatered biosolids feed rate, incineration air flow, temperature control, and air equipment control.. The controls for each incinerator will operate independently of the other incinerators. Each incinerator will have PLC equipment with networking for implementing a cost effective control system. Operational data from the incineration system will be available on the SCADA system. The manual control panels will execute the safe shutdown and startup commands including incinerator purge, high temperature shutdown, and other safety shutdowns. A single PLC per incinerator scheme will be used and there will be no redundancy in the PLC scheme. Due to the complexity of the control system, the process control interlocks will be provided in the PLC. An incinerator will not operate unless its respective PLC is in service and all safeties are satisfied. The control system will consist of the following major components: a. Fluidized Bed Incinerator 1 PLC b. Fluidized Bed Incinerator 2 PLC c. Fluidized Bed Incinerator 3 PLC d. Incinerator Common Equipment PLC e. Sand System PLC f. Continuous Emissions Monitoring PLC g. Fluidized Bed 1 OIT (AB Panelview Operator Interface Station) h. Fluidized Bed 2 OIT i. Fluidized Bed 3 OIT j. Centrifuge PLC and OIT 1 k. Centrifuge PLC and OIT 2 l. Centrifuge PLC and OIT 3 m. Centrifuge PLC and OIT 4 n. Centrifuge PLC and OIT 5 o. Centrifuge PLC and OIT 6 p. Centrifuge PLC and OIT 7 q. Centrifuge PLC and OIT8 r. Electrical Room OIT or HMI s. HMI PC 1 (Incinerator 1) t. HMI PC 2 (Incinerator 2) u. HMI PC 3 (Incinerator 3) v. HMI PC 4 (Dewatering) w. HMI PC 5 (Dewatering) x. HMI PC 6 (Continuous Emission Monitoring System (CEMS) y. The CEMS Historian will be remote and connected over the data highway) 3-4

42 Section 3 Instrumentation and Control The Fluidized Bed OITs and HMI PCs will be located in the Incinerator Building control room. The Electrical Room OIT or HMI will be located in the Incinerator Building electrical room. The OITs will monitor and control their respective incinerators; the HMIs will control and monitor all incinerators and common equipment, as well as provide interface to the plant control system. The Centrifuge PLC and OITs will be located in the electrical room, and monitored by the Dewatering HMIs located in the control room. The control room shall have indirect lighting and have a console similar to the Easterly Wastewater Treatment Plant. A communications rack with Cisco 2955 series or the latest equivalent series switch will be provided for interface to the plant SCADA. This will be in a separate cabinet located in the electrical room. The CEMS system will be a vendor packaged CEMS to monitor carbon monoxide. The system will generate operational reports from the collected data and will use data from each of the incinerators in preparation of the reports. The CEMS system will have its own Historian. There will also be a video system (including server and monitor) that will be separate from the process control system and will be used to monitor each incinerator stack. The video monitoring system will consist of color internet protocol (IP) cameras Truck Loading The control system for the truck loading facility will be integrated into the dewatering control system. Operational status and alarms will be monitored and incorporated into the common dewatering PLC. To improve operator awareness of the offloading facility operation, video cameras will be used for monitoring the loading of the trucks. The SCADA system will monitor the storage tank levels, and control the process equipment for transferring the solids Skimmings The SCADA system for the facility will monitor the tank levels, and control the skimming feed pumps Sitework The requirements for the existing control system network will be evaluated and incorporated into the design of the dewatering and incineration control systems. The network backbone, including the physical fiber optic cables and routing, will be designed 3-5

43 Section 3 Instrumentation and Control with consideration to the new and demolished structures and installed to improve network connectivity and reliability Digester A All work to be performed at Digester A is described in Section 5 Demolition Sludge Storage Tanks The pumps will be controlled through communication through the Ethernet to determine if the centrifuge feed wet well needs more or less biosolids from the sludge storage tanks. These pumps will have variable speed control in order to maintain a desired level in the centrifuge feed wet well. A hard wired safety shutdown interlock will be provided for high-high centrifuge feed wet well level to prevent overflows. 3-6

44 4. Architectural 4.1. General This section reviews the methodology and approach to be employed for the architectural aspects of the project. Refer to the following figures for further delineation of architectural space requirements for the project. Figure 4-6 shows the relative floor elevations between the buildings since they have multiple and varied floor elevations. Figure 4-1 Figure 4-2 Figure 4-3 Figure 4-4 Figure 4-5 "Basement Level Floor Plan"; "Ground Level Plan"; "Second Floor Plan"; "Third Level Plan"; "Roof Plan"; Figure 4-6 "Conceptual Section", that graphically shows the relationship between all areas of the complex, including their floor elevation and floor height; Figure 4-7 through "Space Designations/Elevations and Access", enumerate all spaces throughout the complex on a per-floor schedule; Figure 4-8 "Space Requirements (Architectural)", quantifies non-process spaces that are integral to the project; Code Review Code reviews have been done to establish the applicable codes for the design of this project as well as classify the various buildings Applicable Codes The applicable codes for this project are as follows: Building Code: 2007 Ohio Building Code (based on IBC 2006) Fire Code: 2007 Ohio Fire Code (based on IFC 2006) 4-1

45 Section 4 Architectural NFPA 82 Standard: NFPA 820 Standard: Incinerators & Waste Handling Systems Fire Protection in Wastewater Treatment Facilities Mechanical Code: 2007 Ohio Mechanical Code (based on IMC 2006) Energy Code: 2006 Int'l Energy Conserv'n Code (OAC 4101:1-13) Plumbing Code: 2007 Ohio Plumbing Code (based on IPC 2006) Electrical Code: NFPA70, National Electric Code, Occupancy Classification The three main buildings for this project are the Incinerator Building, the Biosolids Handling Building and the Truck Loading Facility. The classification of each of these buildings is as follows: Incineration: F-1 Factory, Industrial, Moderate Hazard (OBC 306.2) Biosolids Handling: F-1 Factory, Industrial, Moderate Hazard (OBC 306.2) Truck Loading: F-1 Factory, Industrial, Moderate Hazard (OBC 306.2) Control Room, Communications Room, Lunchroom, Offices, Locker Rooms, Toilet Facilities accumulating to less than 10% of total building area (Accessory Occupancies) (OBC 508.3) Type of Construction Classification This classification requires construction with building elements that are noncombustible but will not require fireproofing of steel, etc. Below are code issues for the 45,000 square foot, 60 feet high, building. These code sections require that sprinkling of the areas be provided and that special attention be given to the location of the stairways and elevators; Areas that will be occupied by employees (non process areas) will be designed to comply with ADA requirements. Type IIB Noncombustible, Unprotected (OBC 602.2) Area and Height Limits (General) Special Industrial Occupancies (OBC ) "Buildings and structures designed to house special industrial processes that require large areas and unusual heights to accommodate craneways or special machinery and equipment, including, among others, rolling mills, structural metal fabrication shops and foundries; or the production and distribution of electric, gas or steam power, shall be exempt from the height and area limitations of Table 503." Area Limits Group F-1: Type IIB: 15,500 SF Tabular Area (OBC T503) 4-2

46 Section 4 Architectural Allowable Area Increase (Frontage): Calculation: Total Perimeter = 900 LF Open Perimeter = (100% open to public way of > 60 feet) (100% 25%) + 1 = 175% increase to Tabular Area Allowable Area Increase (Sprinklers): (OBC 506.3) Fully Sprinklered Building 200% increase to Tabular Area Allowable Increase Calculation: 375% + Tabular Area = 475% x 15,500 = TOTAL ALLOWABLE AREA: 73,625 SF ACTUAL AREA: 46,800 SF (within allowable) Height Limits Group F-1: Type IIB: 2 Stories; 40 feet (OBC T503) Allowable Height Increase (Sprinklers): 1 Story; 20 feet TOTAL ALLOWABLE HEIGHT 3 Stories; 60 feet ACTUAL HEIGHT ABOVE GRADE: 3 Stories; 60 feet (within allowable) Fire-Resistance Rating Requirements (OBC T601, except as noted) Structural Frame 0 Hour Bearing Walls Exterior 2 Hour Structural Member in Rated Ext. Wall 2 Hour (OBC 714.5) Bearing Walls Interior 0 Hour Nonbearing Exterior Walls: (OBC T602) 0 to 5 Ft. 2 Hour 5 Ft. to 10 Ft. 1 Hour over 10 Ft. 0 Hour Nonbearing Interior Walls 0 Hour Incineration Rooms 2 Hour (OBC T508.2) Corridor Walls 0 Hour (OBC T1017.1) Stair Walls: 4 + stories 2 Hour (OBC ) < 4 stories 1 Hour Floor Construction 0 Hour Roof Construction 0 Hour 4-3

47 Section 4 Architectural Fire Protection Systems Automatic Sprinkler System (Group F-1) (OBC ) When fire area > 12,000 SF Required. Automatic Sprinkler System Required. (NFPA ) Automatic Sprinkler System Required. (NFPA ) Means of Egress Design Occupant Load Methods (OBC ) Per Table , where applicable. " Where an intended use is not listed, the Building Official shall establish a use based on a listed use that most nearly resembles the intended use." Exception: Where approved by the building official, the actual number of occupants for whom each occupied space, floor or building is designed, although less than those determined by calculation, shall be permitted to be used in the determination of the design occupant load." Tabular Occupant Load Business Areas 100 GSF/person (1) Industrial Areas 100 GSF/person Accessory Storage Areas 300 GSF/person (2) Mechanical Equipment Rms 300 GSF/person (2) Warehouses 300 GSF/person (2) Aircraft Hangers Footnotes: 500 GSF/person (OBC T ) (1) Office areas, including Control Room, etc., are factored under the Business Classification for Occupant Load determination (@100 GSF/person). (2) Process and other areas of the complex are factored under the Mechanical Equipment/Warehouse/Accessory Storage Classification determination (@300 GSF/person). Calculation (per floor): Office/Control Areas: 6,800 SF / 100 = 68 people Process Areas: 37,910 SF / 300 = 127 people Total: = 195 people 4-4

48 Section 4 Architectural Travel Distance: 250 feet from remote point (OBC T1016.1) Dead Ends: < 50 feet in sprinklered Group F (OBC ) Number of Exits: At least 2 serving < 500 (OBC T1019.1) One Exit: Permitted in spaces with < 49 occupants (OBC T1015.1) and 75 feet travel distance maximum (OBC T1019.2) Boiler, Incinerator and Furnace Rooms (OBC ) 2 exits, minimum, separated a horizontal distance at least half the maximum diagonal dimension of room. Electrical Rooms (OBC ) 2 exits, minimum, separated a horizontal distance at least half the maximum diagonal dimension of room. Provide panic hardware. Vertical Exit Enclosures (OBC ) Required when connecting more than 10 people in a stairway that is open to more than a single story above or below exit discharge. Enclosure is not required on stairs that are not an element of egress. Accessibility Employee Work Area General Exception (OBC ) "Spaces and elements within employee work areas shall only be required to comply with Sections (alarm notification appliances), 1007 (accessible means of egress) and (employee work areas) and shall be designed and constructed so that individuals with disabilities can approach, enter and exit the work area." Employee Work Areas (OBC ) Common use circulation paths within employee work areas shall be accessible routes. Also see ADAAG Section (3). Exception: Common use circulation paths, located within employee work areas, that are an integral component of equipment, shall not be required to be accessible routes. Toilet and Bathing Facilities (OBC ) Unisex Toilet and Bathing Rooms (OBC ) Passenger Elevator (OBC ) Locker Rooms (OBC ) Controls, Operating Mechanisms and Hardware (OBC ) Signage (OBC 1110) 4-5

49 Section 4 Architectural Interior Space Dimensions Minimum Ceiling Height (OBC ) Occupiable Rooms Toilet, Kitchen & Storage Rooms Energy Efficiency 7 ft. 6 in. 7 feet (OBC Chapter 13 and IECC) Exterior Walls (OBC Chapter 14) Roof Assemblies and Rooftop Structures (OBC Chapter 15) Structural Design (Material, and Related) (OBC Chapters 16 through 26) Electrical (OBC Chapter 27 and NEC/NFPA 70) Mechanical (OBC Chapter 28 and IFGC) Plumbing (OBC Chapter 29) Minimum Plumbing Facilities: Factory and Industrial Water Closets Lavatories Showers Drinking Fountains Service Sink 1 per 100 occupants 1 per 100 occupants per OSHA 1 per 400 occupants 1 required (OBC T2902.1) Elevators (OBC Chapter 30) Hazardous Materials (OBC 414 and 307) Design Standards Best Practices The following guiding principles will be incorporated into the design of the project throughout its development: Sound Planning/Program of Requirements An initial architectural programming process has been started involving NEORSD personnel and key design team members to begin dialog about the programmatic goals and objectives of the project. Additional sessions and research will continue in order to assure that the project's full potential is achieved to every practical means. The approved program will then serve as the basis to maximize space utilization and logical arrangement. 4-6

50 Section 4 Architectural Practical Design Considerations Appropriate design recommendations will be researched and presented pertaining to efficient design ideas and responsible construction techniques that will best serve the processes and conditions present at the project site. Material Selection Appropriate design recommendations will be researched and presented pertaining to efficient design ideas and responsible construction techniques that will best serve the processes and conditions present at the project site. Code Compliant Design Meet or exceed all applicable codes, including, but not limited to fire safety and fire protective construction, means of egress and handicapped accessible areas and features. Durable with Extended Life Span Selected materials, construction techniques and systems that will age well and sustain their integrity throughout a long service life. This will include the employment of materials that have natural, integral or monolithic finish characteristics. Ease of Maintenance Selected materials, construction techniques and systems will be easy to maintain, including self-healing characteristics where practical, and consideration for minimal and straightforward repairs. Additional consideration in selection and design is to readily support the servicing and replacement of equipment Sustainability/Energy Conservation/Reduced Carbon Footprint Sustainability and energy conservation features will be considered during all phases of the design and layout of the building. A few of these features are described below: Siting of Building(s) Placing this complex predominantly within the present footprint of the abandoned Digester "A" is of significant contribution towards sustainable design. Reduced excavation costs and re-capturing the abandoned sub-grade space will be significant. Of the options considered, this siting allows the new complex to be developed without impact to the nearby overhead high voltage transmission lines, a process that would consume major cost and resources. Building Configuration/Consolidation The consolidated complex - housing the fluidized bed incinerator, biosolids handling and truck loading facility, with corresponding administrative and control space together has resulted in a very concentrated building 4-7

51 Section 4 Architectural configuration compared to many of the other options studied. Consequently, the complex will have significant impact on space and energy efficiency due to these activities occurring within a new facility, High Thermal Value - Envelope Insulation In addition to the benefits resulting from the consolidated incorporation of all the project activities into one facility, the new structure will be notably more energy efficient due to the greater thermal characteristics that can be achieved with new construction materials and technology. Energy Efficiency - Systems and Equipment With the ever-growing list of environmentally-responsible products, the new structure will include lighting, controls, HVAC and plumbing systems, fixtures and appliances that cumulatively will save energy in their operation over any existing counterparts in current structures Building Exterior Materials The following are considered for exterior building materials Above-grade Wall Construction The exterior walls will be provided with an R-19 or greater thermal value. All the insulation will be protected and will not be exposed upon completion of wall construction. Presuming an exposed structural steel frame, exterior walls will require a stiffening framing or back-up support system. The exterior wall material options are described below. The precast insulated concrete panels on backup framing or masonry is the most cost effective type of material. This type of construction will consider the problems currently being experienced on similar wall construction at Southerly and will provide design details to mitigate these problems. Cast-in-Place Concrete has excellent durability, but is cost prohibitive. Masonry (Split Face or Clay Brick) Veneer on Back-Up Framing lacks the integral, monolithic, durable, permanent qualities to be a recommended construction method. In addition the higher cost veneer is neutralized by back up framing cost. Masonry (Split Face or Clay Brick) Cavity Wall Veneer on Masonry Back-Up has excellent durability, but cost prohibitive. Synthetic Stucco Exterior Insulation Finish System (EIFS) is cost effective, but lacks integral, monolithic, durable, permanent qualities to be a recommended construction method. Precast Insulated Concrete Panels on Back-up Framing or Masonry is recommended for this project due to present day excellent performance and being 4-8

52 Section 4 Architectural very cost effective with proper joint detailing. Masonry back up will be considered since it provides redundant waterproofing characteristics Roof Construction The roof system will be provided with a minimum roof thermal value will be R-30. The roofing covering system will be applied over rigid insulation on structural roof deck construction. The roof slope will be incorporated into the structural frame/deck to minimize the cost for tapered insulation. This will also add durability to the installation. The roof will have internal roof drainage piped into the storm drain system, with emergency overflow scuppers through parapet walls. The roof covering system will have a light color coating to reflect solar gain. Incorporate roof slope into structural frame/deck to minimize increased cost for tapered insulation (cost and durability concerns). Internal roof drainage piped into storm drain system, with emergency overflow scuppers through parapet walls. The roof covering system options are described below: EPDM/Hypalon/PVC Membrane Roof Covering has efficacy and durability issues under the wear conditions expected for this project. Living "Green" Roof Covering System may not be compatible with this building given the exposure to chemicals in the direct atmosphere of the complex's processes. First costs and maintenance costs considering the previous statement of a living roof garden may be prohibitive. Modified Bituminous (SBS or APP) Roof Covering System is a sound recommendation. This is the same system provided on other Southerly WWTC buildings. Other Built up (hot or cold applied) Roof Coverings will be considered prior to final selection. A projecting canopy will cover the main entrance to provide protection from the elements. It will be clad in stainless steel and will likely include lighting to illuminate the entry area Doors and Frames The exterior door construction will consist of heavy duty stainless steel frames and insulated door assemblies, with heavy duty door hardware and insulated glazing as appropriate. Security system components will also be integrated into the installation of the door and frames. 4-9

53 Section 4 Architectural Windows and Frames The exterior windows will have stainless steel frame assemblies, heavy duty operating hardware, and triple-glazed insulated safety glazing. Solar exposure, shading, and window proportions will compliment the sustainability of this complex Louvers and Grates Where required for ventilation, intake and relief air, exterior louvers and grates will be inserted in the exterior wall construction. They will bo constructed of heavy duty stainless steel frame and blade assemblies. Locations will be coordinated to be functionally yet aesthetically appropriate. Grates in surrounding concrete retaining wall area wells will occur at the grade level intake and relief air area wells serving the Basement Mechanical Room. These grate and frame assemblies will be stainless steel Building Interior Materials and Construction Partition Walls The partition walls dividing the majority of spaces will be constructed of 8 or 12 inch reinforced cement masonry units (CMU). Small partitioning wall construction may be 4 inch painted CMU construction. Exposed CMU construction will be painted with appropriate coating system based on the application. Sound/vibration attenuation insulation will be provided to isolate occupied areas from process areas. In particular this applies to the centrifuge area and other areas where occupied space abuts processes that generate or involve noisy operation Interior Doors Front entry areas will be equipped with stainless steel frames, door and window assemblies. Other swing doors and frames will be of heavy duty construction, and will be of appropriate materials (stainless steel, aluminum, or FRP-clad metal) as determined appropriate based on the exposure to elements, chemicals and processes. Appropriate doors will be equipped with safety glazed view windows. Overhead and large access doors will be of FRP clad heavy duty steel in painted steel frames. Service access panels, doors and grates will be of appropriate materials (painted steel, galvanized steel, stainless steel, aluminum, FRP-clad metal, etc.) as determined appropriate based on the exposure to elements, chemicals and processes Room Construction and Finishes All room finishes will be as determined appropriate for the nature of use and traffic of each space. All spaces will be designed and equipped with accessories, controls and features to facilitate appropriate level of accessibility in accordance with the ADA and the ADA Accessibility Guidelines. 4-10

54 Section 4 Architectural The offices, the control room and similar occupied spaces will have solid color vinyl composite tile flooring, vinyl cove base, painted drywall wall surfaces and a lay-in 2 foot by 2 foot suspended acoustical tile ceiling. Lighting will be lay-in 2 foot by 4 foot light fixtures and lay-in HVAC grilles and diffusers. The locker rooms, toilet rooms and similar wet exposure public use areas will have ceramic tile flooring and coved ceramic tile base, walls clad with ceramic tile wainscoting, with painted drywall above. The ceiling will be wet-location lay-in 2 foot by 2 foot suspended acoustical tile ceiling and lighting will be lay-in 2 foot by 4 foot light fixtures and lay-in HVAC grilles and diffusers. The process areas will be constructed and finished appropriate for the nature of processes and exposure to chemicals, for each area. Finishes include sealed or otherwise appropriately coated concrete floors, vinyl cove base, painted CMU walls and painted out structural deck above, with all utilities, piping, etc. exposed and painted within the space. Lighting will be appropriate utility light fixtures and exposed painted HVAC ductwork will distribute via exposed grilles and diffusers attached directly to the ductwork. The support spaces, including stairs, electrical rooms, mechanical rooms, maintenance, parts storage, etc. will have sealed concrete floors, vinyl cove base, painted CMU walls and painted out structural deck above, with all utilities, piping, etc. exposed painted within the space. Lighting will be appropriate utility light fixtures and exposed painted HVAC ductwork will distribute via exposed grilles and diffusers attached directly to the ductwork. A heavy load rated, large freight, elevator will be provided. The cab will be approximately 10 foot by 10 foot by 11 foot high clear. Nominally the doors will be 6 foot wide by 10 foot high clear, for equipment movement. Finishes will be painted heavy duty steel panel or other appropriate finishes determined most compatible with the environment and exposure to chemicals. A passenger elevator will also be provided. The cab will be approximately 5 foot by 8 foot by 8 foot high clear, with standard opening door sizes. Finishes will be plastic laminate panel, painted steel panel, or other appropriate finishes determined most compatible with the environment and exposure to chemicals Dewatering Spaces The Biosolids Handling Building will have numerous levels to provide the space necessary for equipment installation and operation and maintenance as well as personnel needs Basement Level The basement level is a common level to both the Biosolids Handling Building and the Incinerator Building. See Figure 4-1 Basement Level Plan. The basement level 4-11

55 Section 4 Architectural (Elevation: 590.5; 25 feet floor-to-floor) in the Biosolids Handling Building includes the Blower Room, Centrate Well and pumps, Skimmings Handling Area, Polymer Handling Area, and the Centrifuge Feed Wet Well and pumps (below Truck Loading). A transition stair or ramp will connect to Tunnel 5 (Elevation 586.4) heading north. The East Support Wing (Elevation: 590.5; 15 feet floor-to-floor) accommodates the Mechanical Room and Parts Room. The building footprint is extended to the north and east to provide for the air intake and relief plenums to vertical areaways that project to the grade level. The West Support Wing (Elevation: 590.5; 15 feet floor-to-floor) accommodates the Maintenance Work Area Ground Level The ground level is mainly the support wings to allow direct access to grade. (Elevation: 605.5; 15 feet floor-to-floor). Figure 4-2 Ground Level Plan shows the room/functions at this level as well as showing that this level is still part of the upper area of primary dewatering/biosolids process area. At this level the East Support Wing is occupied by the Control Room, Vestibule, Laboratory, and offices. The West Support Wing is occupied by the Electrical Substation Room Second Level The second level (Floor Elevation 615.5; 20 feet floor-to-floor) in the Biosolids Handling Building is shown on Figure 4-3 Second Floor Plan. This level contains the Cake Feed Room and shows a five-foot difference in the support wings (Elevation 620.5; 15 feet floor-to-floor). Areas in the East Support Wing are the Men's, Women's & Manager's Locker Rooms and the Communications Room. The West Support Wing accommodates the Electrical MCC Room Third Level The third level (Elevation: 635.5; 15 feet floor-to-floor) includes the Centrifuge Room, Lunchroom, Mechanical Rooms, and an additional office area. Refer to the Figure 4-4, Third Level Plan for location of these areas Incineration Spaces The Incineration Building has three levels, not necessarily at the same elevation levels as the Biosolids Building. See Figures 4-1, 4-2 and 4-3 for rooms and areas for the following levels. 4-12

56 Section 4 Architectural Basement Level The basement level (Elevation: 590.5; 12 feet floor-to-floor) is at the same level as the Biosolids Handling Building and contains the Incinerator equipment at Basement Level, Ash Sump and pumps, Caustic Storage, and sand ejector. A transition stair or ramp will connect to Tunnel 5 (Elevation 586.4) heading south Ground Level Ground level (Elevation: 602.5; 26 feet floor-to-floor) for the incinerator building provides access to the bed guns, cake feed ports, various instrumentation, and the caustic feed systems Third Level The third level (Elevation: 628.5; 22 feet floor-to-floor) is at the roof of the Fluidized Bed Incinerators and supports the high pressure spray pump system Truck Loading Spaces The Truck Loading Facility is next to the Biosolids Handling Building to provide a second means of dewatered biosolids disposal. There are essentially two levels in the Truck Loading Facility. The basement level is actually a part of, and is accessed through, the Biosolids Handling Building basement level Basement Level The basement level (Elevation: 590.5; 15 feet floor-to-floor), or level below the truck loading area houses the Centrifuge Feed Wet Well and pumps (noted in Dewatering, ) Ground Level The ground level (Elevation 605.5; 25 feet floor-to-floor) is the Truck Loading Area, which is located at grade for the trucks to easily enter and exit Third Level The third level (Elevation 630.5; 35 feet floor-to-floor) has the Cake Storage Room, which contains the cake storage silo and the truck loading equipment Skimmings The work in this area is addressed in Section 4.2 Dewatering. 4-13

57 Section 4 Architectural 4.6. Sitework Sitework immediately adjacent to the building will include limited landscaping adjacent to the primary building entrance and the inclusion of retaining walls to envelope area well gratings for air intake and relief to the Basement Mechanical Room on the north and east sides of the Dewatering building. Site restoration will occur around the balance of the complex, especially in coordination with the removal of Digester "A". See section 12, Civil for a description of roadways, parking lots, and other site improvements. Section 11, Electrical describes the site lighting to be provided Digester A No work is anticipated beyond the site restoration that will result from the removal of the existing structure Sludge Storage Tanks No architectural work will be performed in this area. 4-14

58 5. Demolition 5.1. General Demolition under this project will include Digester A, Odor Control Buildings A and B, and Vapor Combustion Units (VCUs) No. 3 and 4. The areas affected by the demolition work are shown in Figure 5-1. Before demolition work begins, the District will initiate a survey of all building areas to be demolished to determine the presence and extent, if any, of asbestos and/or lead paint requiring special disposal Dewatering No demolition work will occur in the existing dewatering area Incineration No demolition work will occur in the existing incineration area Truck Loading No demolition work will occur in the existing truck loading area Skimmings Southerly No demolition work will occur in the existing Skimmings Decant and Storage Facility Easterly Demolition work in the existing skimmings area at Easterly is detailed in Section 2 Process Sitework Sitework demolition is included in Section 5.7 Digester A and Section 5.8 Sludge Storage Tanks. Additional information about sitework is provided in Section 12 Civil Digester A The new Biosolids Handling and Incineration Building will be located on the site of the existing Digester A facility, which was constructed in 1935 and will be demolished. The Digester A facility consists of six hexagonally-shaped concrete-walled anaerobic 5-1

59 Section 5 Demolition sludge digesters (Tank Nos. 1-6) surrounding a central control chamber, adjacent sections of Tunnel 5 and all interior process equipment, heating and ventilating equipment, piping, and interior and exterior lighting, conduits and wiring. The length of each hexagonal side and the radius to each interior corner of each digester are about 55.4 feet. The digesters have a sidewall depth of 23.5 feet, and each unit has a floating cover supported by a steel truss. Top of slab elevations for the 18 thick digester floors are at El in the center and El at the side walls. Each digester is surrounded by an earthen berm that rises approximately 4.0 feet above finished grade (El ). The floor of the control chamber is at El , and floor of Tunnel 5 slopes upward from there toward the north and south. All of the structures to be demolished are supported on timber piles Phasing of Demolition of Digester A Facilities The new Biosolids Handling and Incineration Building will occupy the space that is currently occupied by the central control chamber and portions of Tunnel 5 of the Digester A facility. Due to the schedule requirements that the construction of the new Biosolids Handling and Incineration Building be completed by mid-2012 and that the excavation for the Biosolids Handling and Incineration Building be started by early 2009, it will be necessary to remove and reroute, during 2008, the existing active piping that passes through the central control chamber. Because the contract documents for the construction of the Biosolids Handling and Incineration Building will not be completed until the end of 2008 and because of the need to complete the pipe rerouting by that time so concrete demolition can begin in early 2009, the pipe rerouting must be accomplished under a separate contract. Consideration was given to bidding a separate contract that would include both the complete demolition of the Digester A facility and the relocation of all active piping by the end of However, because of the need to protect adjacent structures and roadways from movement after the existing digester walls and slab are removed, and to avoid the need to dewater the excavated area for several months, it is proposed that the demolition be conducted in two phases and under two separate contracts. Demolition of all interior process equipment, heating and ventilating equipment, and piping which may have reuse or salvage value will be accomplished under the Phase 1 contract. This contract will also include the construction of piping and electrical and I&C conduits and wiring necessary to maintain plant operations throughout the demolition of the Digester A facilities and construction of the new Biosolids Handling and Incineration Building. The piping and conduits will be removed from the portion of Tunnel 5 between Tunnels 10 and 9 and those needing to remain in service will be routed through existing Tunnels 9, 10, 11 and

60 Section 5 Demolition Phase 2 demolition of all concrete structures, including interior and exterior walls and floor slabs of the digesters, control chamber and portions of Tunnel 5 will be accomplished under the Biosolids Handling and Incineration Building construction contract in early Included with this demolition would be any remaining equipment and piping. By keeping the concrete floor slabs and exterior digester walls in place until the Biosolids Handling and Incineration Building construction contract begins, costs can be reduced by avoiding the need to maintain a ground water dewatering system and temporary ground support structures for an open excavation during the months that intervene between the two contracts. For each contract, suitable locations on the site will be assigned to the contractor for use as staging areas during construction. Prior to commencement of the Phase 1 demolition contract work, a separate contract will be prepared to remove and dispose of the floating covers of each of the six digesters and remove and dispose of all sludge and liquids from each of the digesters Phase 1 Demolition Contract The Phase 1 demolition contract will mainly consist of rerouting specific pipe and removal of salvageable equipment and piping. Because of the requirement to keep active all currently active piping, conduits and wiring passing through the control chamber and portions of Tunnel 5 to be demolished, the Phase 1 contractor will be required to install rerouted piping, conduits and wiring prior to initiating demolition of the existing piping, conduits and wiring in the tunnel. The rerouting of piping, conduits and wiring are detailed in the two subsections that follow. Only minor quantities of concrete will be demolished as part of the Phase 1 contract, but the existing concrete will be cleared of all piping, conduits and equipment to facilitate concrete demolition under the Biosolids Handling and Incineration Building construction contract. All existing glass-lined piping removed from the area will be salvaged and turned over to the District Pipe Rerouting in Phase 1 There are several piping systems that pass through the control chamber of the existing Digester A facility via Tunnel 5. Most of this piping is active and carries process and utility flows that will need to continue to flow with as little interruption as possible during the demolition and rerouting work. In general, new piping will be installed around the western perimeter of the Digester A demolition area via Tunnels 9, 10, 11 and 15 and connected to the existing piping outside the limits of demolition, as shown on Figure 5-2. This installation will be completed prior to the removal of existing piping that passes through the demolition area. The active piping to be rerouted includes: 5-3

61 24 Waste Liquor (WL) 10 Thermally Conditioned Thickened Overflow and Filtrate (TCTO&F) 12 Easterly Sludge (ES) 6 Skimmings (SK) 4 Hot Water Supply (HWS) 4 Hot Water Return (HWR) Section 5 Demolition The existing DES line is not active and will not be rerouted under this contract. The DES within the limits of the demolition area will be abandoned and demolished as salvage to be turned over to the District. The WL line is used to convey waste liquor from the Waste Liquor Handling Building to the primary settling tanks. Approximately 900 lineal feet of new 24 WL pipe will be installed to reroute this line from the intersection of Tunnels 10 and 11 northward through Tunnel 11 and eastward through Tunnel 15 then southward in Tunnel 5 to the existing blind flange, as shown in Figure 5-2. The existing 24 WL and 10 TCTO&F lines in Tunnel 10 extending eastward from Tunnel 11 will be demolished to make space for relocated HWS, HWR and SK piping. The junction of the 24 WL and the 10 TCTO&F lines will be relocated from a 24 by 10 connecting tee located in Tunnel 5 about 110 ft. south of Tunnel 15 to a new location near the intersection of Tunnels 10 and 11. This will minimize costs by eliminating the need to reroute a lengthy segment of the 10 TCTO&F line. The existing 24 by 10 connecting tee in Tunnel 5 will be removed along with all TCTO&F piping extending southward from that point. There are two existing 12 Excess Activated Sludge (EAS) lines in Tunnel 10 that are not in service, with no plan to reactivate them in the near future. It is proposed to use these pipe segments to reroute the 12 ES line from Tunnel 5 through Tunnel 10 to Tunnel 11. A new 12 piping segment of approximately 900 lineal feet will be installed in Tunnels 11 and 9 to reconnect this line at the intersection of Tunnels 9 and 5, as shown in Figure 5-2. A 6 skimmings line that currently passes through the Digester A on its way to the Skimmings Decant and Storage Facilities will be rerouted westward through Tunnel 10, then northward through Tunnel 11, ultimately reconnecting to its original route at the intersection of Tunnels 11 and 9. Approximately 900 lineal feet of new piping would be required for this rerouting. Alternatively, to reduce costs for new piping, most of the existing piping through the Digester A area could be dismantled and reinstalled in place of the new piping if it is acceptable to plant operations that the skimmings piping system can be out of service for a period of several days. If operations personnel determine that it is only permissible for this system to be out of service for a few hours, costs could still be reduced by temporarily recycling the skimmings to the primary 5-4

62 Section 5 Demolition settling tanks through a temporary connection to the 24 WL while the existing 6 SK piping is dismantled and relocated. These alternatives will be considered during detailed design. There are two pairs of existing hot water lines entering the control chamber area from the north side. The pair with white insulation and black labeling will be demolished and capped, as they are only connected to the heaters in the Digester A control chamber, which are abandoned and to be demolished, and the heaters in the Sludge Storage Tank control chamber. The Sludge Storage Tank area will be tied into the hot water system in the Gravity Thickener Area. The required piping is already in place between the Gravity Thickener and the Sludge Storage Tanks, and will only need to be reconnected. The 4 HWS and 4 HWR with blue insulation will be rerouted from the intersection of Tunnels 9 and 11 southward through Tunnel 11 and then eastward through Tunnel 10 and reconnected to the existing piping at the intersection of Tunnels 10 and 5, as shown in Figure 5-2. Consideration will be given to minimizing the cost of new piping by dismantling and relocating the existing piping from Tunnels 9 and 5 for this purpose if plant operations can authorize the temporary shutdown of the hot water system for a period during the summer months. The plant s non-potable water (NPW) system is a looped system, and NPW piping is present in Tunnels 5 (12 ), 9 (16 ), 10 (12 ) and 11 (16 ). The existing 12 NPW in Tunnel 5 will be isolated by closing the 12 ball valve south of Digester A and the 12 (or 16 ) ball valve to the north of Digester A. Because the NPW lines are looped, the 12 pipe section running through the Digester A control chamber and adjacent sections of Tunnel 5 can then be removed without interruption of service elsewhere. This connection can be reestablished through the new Biosolids Handling and Incineration Building during its construction to provide NPW for the new systems in that building, and no rerouting is proposed as part of the Phase 1 work. The plant s potable water (PW) system is also a looped system, and PW piping is present in Tunnels 5, (varies from 4 to 6 ), 11 (6 ) 15 (3 ) and portions of 10 (6 ). The 4 PW in Tunnel 5 will be cut and capped to the north and south of Digester A. To maintain the looping of potable water through the sludge storage tank and gravity thickener areas, the remaining 4 potable water line extending southward through Tunnel 5 will be connected to the existing 6 potable water line in Tunnel 10 at the intersection of Tunnel 10 and Tunnel 5, south of the digester. The north-south connection between Tunnels 15 and 10 can be reestablished through the new Biosolids Handling and Incineration Building as that building is being constructed. Figure 5-3 presents cross sections of the proposed rerouted piping in Tunnels 9, 10, 11 and 15 and establish that sufficient space exists in these tunnels to accommodate the needed piping. There are several pipe runs in the existing tunnels that abandoned in 5-5

63 Section 5 Demolition place, as evidenced by blind flanges or gaps in the piping. With the exception of Tunnel 5 within the Digester A area, all existing abandoned piping will be left in place except where removal is necessary to make space for the installation of the rerouted piping or if the pipe has a salvage value. Figure 5-4 indicates the areas where piping will be removed. Unless authorized by the District, no active piping will be removed before the rerouted piping is installed and connected. All existing glass-lined piping that is removed during the demolition and not reused will be salvaged and returned to the District. All other removed piping that is not reused will be hauled away by the Phase 1 contractor for disposal. All system interruptions needed to make the new piping connections will be coordinated with plant operations staff. Pipe stubs and/or blind flanges will be left in Tunnel 5 to allow the future routing of HWS, HWR, NPW and PW into the basement of the new Biosolids Handling and Incineration Building Electrical and I&C Rerouting in Phase 1 The following electrical, communication and control conduits and cables will be removed from the central control chamber and portions of Tunnel 5 (between Tunnel 10 and Tunnel 9) and rerouted through Tunnels 10, 11, 15 and 9: 2 multi-line telephone trunk cable from the Maintenance Building (Building 95) that is not in conduit but directly supported by the existing structure 2 PVC conduit containing fiber-optic cable used for plant process monitoring and control two 2 conduits containing plant automation cables (new conduits will run between existing plant automation junction boxes at the intersection of Tunnels 5 and 15 and the intersection of Tunnels 5 and 10) four 1 unidentified conduits In addition, the power will be disconnected from the Digester A power panel and the conduit and cable feeding this power from Substations 5 and 10 will be removed. Finally, the underground cables that feed power to recently-installed outdoor lighting fixture A-11 (located at the intersection of Roads B and Q) will be disconnected outside of the footprint of the new Biosolids Handling and Incineration Building and the photocell, surge protector, contactor and field junction box (all currently attached to the Digester A structures) will be carefully removed and salvaged for reinstallation by the Phase 2 contractor. The contractor will be instructed to coordinate his work with the plant staff to maintain normal plant operations and minimize the period of time to reconnect the new telephone, fiber optic and plant automation cables. 5-6

64 Structural Demolition During Phase 1 Section 5 Demolition Most of the structural demolition will be conducted by the Phase 2 contractor. However, Tunnel 15 has two interior concrete block walls (for the Shelter-In-Place facilities, which are no longer used) that should be removed to facilitate the rerouting of the 24 WL line Phase 2 Demolition under Biosolids Handling and Incineration Building Construction Contract The second phase of the demolition of the existing Digester A facilities and the demolition of Odor Control Buildings A and B and VCUs No. 3 and 4 will be included as part of the Biosolids Handling and Incineration Building construction contract and will be conducted during the early months of that contract. A suitable location will be assigned to the contractor to use as a staging area during construction. The contract documents will provide for site condition requirement considerations including a site traffic control plan, restriction on access to nearby buildings, dust control and noise control measures. No existing pavement, catch basins, manholes or yard piping will be removed as part of this contract Demolition of Concrete Structures of Digester A Construction of the new Biosolids Handling and Incineration Building will require the removal of all concrete slabs and walls associated with the digesters and control chamber and sufficient portions of Tunnel 5 to accommodate the footprint of the new building (see Figure 5-5). Prior to any demolition of tunnel structure, the contractor will be required to construct temporary bulkhead systems (see Figure 5-6) inside the tunnel and located approximately as shown in the figure to protect the tunnel from weather during demolition and construction. Then, temporary shoring (probably sheet piling) will be installed along the northern (Service Road Q) and eastern (Service Road B) portions of the site, extending as shown in Figure 5-5, to protect the roadways, existing utilities and nearby structures from movement when the site is excavated. Permanent shoring, preferably sheet piling, will also be installed along the southern and eastern ends of the future excavation to protect existing Tunnel 10 from any possible lateral movement. A soil dewatering system meeting the requirements of the geotechnical evaluation and findings will be installed to lower the water table on the site to below the level of the lowest floor slab. Next, demolition of the inner walls of the facility can begin, and when the water table has been lowered sufficiently demolition of the floor slabs and outer walls can begin. Demolition of all concrete structures associated with the digesters could be accomplished in as little as three weeks after the shoring and soil dewatering systems are in place. Along with the concrete structures, the remaining equipment, piping, conduit, etc. will be demolished. The major items include the demolition of the following piping and equipment inside each of the six digesters (lineal footages are approximate): 5-7

65 440 lineal feet of 6 and 8 piping 2,600 lineal feet of 3 heating coils 150 lineal feet of 10 sludge draw-off piping all steel pipe supports Section 5 Demolition All piping, equipment and conduits/wiring will be removed from the control chamber and portions of Tunnel 5 to be demolished, including: all associated valves all steel pipe supports waste burner furnace two ventilation fans and motors ladders, grilles, handrails and other exposed metal boiler and hot water circulating pumps sludge heating equipment including six heaters and heater motors drainage pump and associated equipment sample sink gas meters all interior and exterior lighting fixtures all power and lighting panels motor starters and instruments all doors The existing timber piles will not be pulled by the demolition contractor. Only those piles that interfere with the driving of steel piles for the new structure will be pulled Reinstallation/Relocation of Buried PW Pipe and Fire Hydrant There is an existing buried 8 PW line supplying a fire hydrant just to the south of Road Q. This PW line and fire hydrant will be reinstalled or relocated during Phase 2 to allow the installation of shoring to protect Road Q and the Maintenance Building Sludge Storage Tanks Odor Control Units A and B, and VCUs No. 3 and 4 The existing odor control system for the Thermally Conditioned Sludge Thickeners (TCSTs) consists of scrubbers in Odor Control Building A (Building 55), and for the Sludge Storage Tanks (SSTs), the odor control system consists of scrubbers in Odor Control Building B (Building 53). The odorous air from Odor Control Units A and B is routed to a common plenum and then into Vapor Combustion Units (VCUs) 3 and 4, which are located in VCU Building No. 2 (Building 41). 5-8

66 Section 5 Demolition In addition to the demolition of the Digester A facility, this project will also include demolition of Odor Control Buildings A and B and all process equipment in Vapor Combustion Unit (VCU) Building No. 2. This demolition work will be performed under the Biosolids Handling and Incineration Building construction contract. The TCSTs are part of the Zimpro process, which must remain functional until the new incineration facilities are operational. Therefore, none of the demolition work associated with the odor control buildings will be initiated until construction of the new Biosolids Handling and Incineration Building has been completed and the new incinerators are put into service Demolition of Odor Control Buildings A and B Odor Control Buildings A and B are one-story slab-on-grade structures that contain Odor Control Systems A and B, respectively. Their floor areas are each approximately 1,200 square feet. Building A is a concrete block building while Building B has wooden exterior walls. Odor Control Systems A and B treat gases from the four thermally-conditioned sludge thickeners (TCSTs). Odor Control System A consists of two scrubbing trains each consisting of first and second stage scrubber towers along with ductwork, valves, NPW piping, chlorination equipment and an induced draft fan. Odor Control System B consists of two scrubbing trains each consisting of a scrubber tower containing plastic media, ductwork, butterfly valves, NPW and chemical piping, a recirculation pump, an induced draft fan and local controls. All equipment, lighting, heating and ventilating equipment, ducts, piping, interior duct and piping supports, interior railings and panels will be removed from Odor Control Buildings A and B for disposal by the contractor. Underground conduit feeding these buildings will be abandoned in place. Then each structure, with the exception of its concrete slab on grade, will be demolished. Exterior FRP ductwork and supports will be demolished back to a flanged connection near the control building that is centrally located between the four TCSTs. Existing ductwork from the TCSTs and the associated ductwork supports will be removed, and new ductwork will be connected to new odor control facilities as described in Section 10 Odor Control Demolition of VCUs No. 3 and 4 VCUs No. 3 and 4 are located in Vapor Combustion Building No. 2, a single-story 1,700 square foot slab-on-grade building with concrete block walls. The building houses process equipment including two thermal oxidizers and tray scrubbers that process vapors originating in the Thermally Conditioned Sludge Thickeners and Sludge Storage Tanks 5-9

67 Section 5 Demolition No. 8 and 9. Each unit includes an oxidizer chamber, burner, primary heat exchanger, combustion blower and various controls for combustion, temperature and airflow. All process equipment will be removed from the building, but the building itself, lighting and H&V systems will be left in place and the building will become available for other use. Underground power and control cables feeding process equipment in the building will be removed and the empty conduits will be abandoned in place. The openings in the roof of the building used for the stacks of the combustion units will be permanently sealed. The demolition contractor will be allowed to salvage the process equipment for his own use. 5-10

68 6. Structural 6.1. General The structural design for the design of the new Biosolids Handling and Incineration Building shall follow the following codes and criteria Applicable Codes Ohio Building Code 2007 ACI Manual of Concrete Practice, 2002, Part 1, Part 2, Part 3, Part 4, Part 5 (5 books) AISC Manual of Steel Construction (AISC ) Aluminum Construction Manual, Section I, Specifications for Aluminum Structures; Section 3, Engineering Data for Aluminum Structures Building Code Requirements for Reinforced Concrete (ACI ) Environmental Engineering Concrete Structures (ACI ) Building Code Requirements for Masonry Structures (ACI ) Minimum Design Loads for Buildings and Other Structures including Supplement No. 1 and excluding Chapter 14 and Appendix 11A (ASCE 7-05) Standard Specifications for Highway Bridges adopted by the American Association of State Highway and Transportation Officials (M AASHTO) Material Properties and Design Strengths Reinforced Concrete Design reinforced concrete using Strength Design Methods or Alternate Design Methods (Working Stress) as described in Appendix A of ACI 318. Cast-in-place structural concrete: f c = 4000 psi. Cast-in-place concrete fill f c= 2500 psi Deformed steel reinforcing bars: ASTM A615, Grade 60 Welded wire fabric mesh: Reinforced Masonry ASTM A185 Design masonry elements as engineered masonry in accordance with the Allowable Stress Design Method (ASD) specified in ACI 530 New concrete masonry units: f m = 1500 psi Deformed steel reinforcing bars: ASTM A615, Grade

69 Section 6 Structural Allowable tensile and compressive stress in reinforcement: fs = 24 ksi Structural Steel Design structural steel based on the Allowable Stress Design Method (ASD) Structural steel members - new: Beams and Columns: ASTM A572 Grade 50 Channels, Angles, and S-Shapes: Tubes: ASTM A36 ASTM A500 Grade B Structural Pipes: ASTM A53, Welding Electrodes: Structural Bolts: Type E or S, Grade B E70XX A325 Galvanized Anchor Rods: ASTM F1554 Gr Aluminum Structural Handrails and Guardrails ASTM B T Design Loads Design loads will be a combination of the various loads discussed below Dead Loads Dead loads are those resulting from the weight of all fixed construction, equipment, and fixtures such as walls, partitions, floors, roofs, cladding, equipment bases and all permanent non-removable stationary construction Live Loads The following minimum uniform live loads shall be used for design: Electrical Control, Electrical, and VFD Rooms : Process Areas Storage Areas Stairs, Landings, and Walkways Corridors and Lobbies Floor Gratings and Hatches in other Process Areas: Ground Surcharge above underground Tunnels Ground Floor of Garage 300 psf 200 psf 300 psf 150 psf 150 psf 200 psf 300 psf or AASHTO HS psf 6-2

70 Section 6 Structural or AASHTO HS20 Roofs of all Buildings (also consider ponding) 20 psf minimum In addition, consideration shall be given to the actual weights of and operating loads applied by equipment, water, and piping, and to the effects of impact Hoisting Loads Hoisting loads will be determined by the weight of the equipment needed to be maintained Wind Loads Minimum design wind loads on new structures shall be in accordance with OBC using: Basic wind speed (V) = 90 mph Importance factor (I) = 1.15 Exposure C Snow Loads Minimum design snow loads on new structures shall be in accordance with OBC using: Ground Snow Load = 30 psf Exposure Factor (Fully Exposed) = 0.9 Importance Factor = Seismic Loads Seismic loads on new structures shall be in accordance with OBBC using: Site Class D Occupancy Category III Importance Factor = 1.25 Spectral Response Acceleration S S = Spectral Response Acceleration S 1 = Lateral Earth Pressures The geotechnical report is in the process of being prepared. The following values are preliminary pending completion of the geotechnical report. Granular Natural Soil or Fill At-Rest Pressures - Equivalent lateral fluid pressure above groundwater: 65 pcf - Equivalent lateral fluid pressure below groundwater: 92 pcf 6-3

71 Section 6 Structural Active Pressures - Equivalent lateral fluid pressure above groundwater: 45 pcf - Equivalent lateral fluid pressure below groundwater: 83 pcf Compacted Engineered Granular Fill At-Rest Pressures - Equivalent lateral fluid pressure above groundwater: 58 pcf - Equivalent lateral fluid pressure below groundwater: 92 pcf Active Pressures - Equivalent lateral fluid pressure above groundwater: 36 pcf - Equivalent lateral fluid pressure below groundwater: 81 pcf Lateral surcharge due to vehicles located within a distance equal to half of wall height from the wall (2 feet of soil) 120 psf For additional information regarding lateral soil pressures for other soil types, refer to the Geotechnical Report Stability Requirements Factor of Safety against overturning = 2.0 Factor of Safety against sliding = 1.5 Factor of Safety against flotation: Structures with superstructures or habitable structures: with ground water at or above grade: = 1.10 with ground water below grade = 1.25 Liquid-containing structures and minor structures (vaults and manholes) = Foundation Information The foundation design information will be prepared when the geotechnical report has been completed. The design will take into consideration the 100 yr Flood Elevation which is ft Dewatering The foundation system for the Biosolids Handling Building will consist of a mat floor slab that is supported by pile caps that bear on friction piles. The basement walls will be cast-in-place concrete retaining walls that will supported by piles. Due to the high normal ground water elevations, the basement floor slab will be designed to resist buoyant uplift forces. Additional piles acting in tension may be required to resist the high 6-4

72 Section 6 Structural uplift forces from the groundwater. Consideration will be given to raising the level of the basement floor in order to reduce the buoyancy uplift pressures on the floor slab. Since most of the basement floor will be located below the normal groundwater elevations, the concrete walls and floor slabs will be designed with strategically placed joints and waterstops in order to maintain a leak-free environment. The superstructure will be comprised of structural steel framing that extends from the basement up to the roof. Intermediate floors will consist of steel beams that support castin-place concrete floors. In locations, masonry walls may be provided to create separate rooms and vertical shafts. The structural framing will be designed and detailed to support the selected exterior façade system. The building will be laterally supported to resist wind and seismic forces by utilizing a system of vertically braced frames connected together with horizontal bracing located at the roof. Hoist beams and monorails will be located where required by operational and maintenance needs. A long span bridge crane will be provided over the centrifuge equipment. The structural framing system for the roof may be comprised of long-span steel joists Incineration The foundation system for the Incinerator Building will consist of a structural concrete mat floor slab that is supported by pile caps that bear on friction piles. The basement walls will be cast-in-place concrete retaining walls that will be supported by piles. Additional piles and possibly separate pile caps will support selected heavy pieces of equipment such as the incinerators. Due to the high normal ground water elevations, the basement floor slab will be designed to resist buoyant uplift forces. Additional piles acting in tension may be required to resist the high uplift forces from the groundwater. Since most of the basement floor will be located below the normal groundwater elevations, the concrete walls and floor slabs will be designed with strategically placed joints and waterstops in order to maintain a leak-free environment. The superstructure will be comprised of structural steel framing that extends from the basement up to the roof. Intermediate floors will consist of steel beams that support either open steel grating or cast-in-place concrete floors. In some locations, masonry walls will be provided to create separate rooms and vertical shafts. The structural framing will be designed and detailed to support the selected exterior façade system. 6-5

73 Section 6 Structural The building will be laterally supported to resist wind and seismic forces by utilizing a system of vertically braced frames connected together with horizontal bracing located at various levels. Hoist beams and monorails will be located where required by operational and maintenance needs. The structural framing system for the roof of the Incinerator Building will be designed with removable deck and beams in select areas so that the Incinerators can be removed in the future if necessary. Where possible, steel bar joists will be provided to support the roofing system 6.4. Truck Loading The Truck Loading Facility will consist of a steel superstructure to house one biosolids storage silo. The facility will span the Centrifuge Feed Pump Room below and extend a few feet over the Centrifuge Feed Wet Wells below. The pump room and wet wells will consist of structural concrete mat floor slabs that are supported by pile caps that bear on friction piles. Due to the high normal ground water elevations, the basement floor slab will be designed to resist buoyant uplift forces. Additional piles acting in tension may be required to resist the high uplift forces from the groundwater. Since most of the pump room and wet wells will be located below the normal groundwater elevations, the concrete walls and floor slabs will be designed with strategically placed joints and waterstops in order to maintain a leak-free environment. The floor slab at the grade level will act as the roof slab over the wet wells below. It will be designed to support the weight of the trucks that will occupy this building. The superstructure will be comprised of structural steel framing that extends from the main floor level up to the roof. Intermediate floors will consist of steel beams that support cast-in-place concrete floors. The structural framing will be designed and detailed to support the selected exterior façade system. Typically, this building will be laterally supported to resist wind and seismic forces by utilizing a system of vertically braced frames connected together with horizontal bracing located at the roof Skimmings The skimmings area is located in the Biosolids Handling Building. See Section 6.2 for description. 6-6

74 Section 6 Structural 6.6. Sitework Sheeting and shoring required for the construction of the new Biosolids Handling and Incineration Building are described in Section 5, Demolition Digester A Structural work required for demolition of the existing Digester A structures is provided in Section 5, Demolition Sludge Storage Tanks Two Sludge Storage Tanks (SSTs #8 and #9) are currently used for storing liquid biosolids until they are pumped to the Thermal Conditioning Process. Under this project, these tanks will continue to be used on a daily basis for storing biosolids until they are pumped to the Centrifuge Feed Well in the new Biosolids Handling Facility. In addition, SSTs #7 and #10 will be rehabilitated to store biosolids during peak production periods. All four tanks and the central Control Chamber will receive structural repairs as needed. In addition, SST #7 will be retrofitted with platforms and columns to support new mixing equipment to match SSTs #8, #9, and #

75 7. Heating, Ventilation and Air Conditioning 7.1. General Although the Biosolids Handling and Incineration Building has common walls there are three main buildings which are the Incinerator Building, the Biosolids Handling Building and the Truck Loading Facility. These buildings are further subdivided by functional rooms and process areas, all of which have different heating, cooling and ventilation needs Scope of Work Areas requiring ventilation will be provided with sufficient ventilation for year-round performance, service, operation and maintenance of all floor levels of all process spaces. All process area continuous ventilation systems shall be fitted with air flow detection devices connected to alarm signaling systems to indicate ventilation failure in accordance with NFPA 820 "Fire Protection in Wastewater Treatment Facilities". Air Conditioning will be provided for occupied spaces for personnel comfort as well as cooling and conditioning air for critical electrical equipment. Smoke detectors shall be installed in the return air ducts for A/C units greater than 2000 CFM and shall be signaled to the fire alarm panel. See Section 11, Electrical. See Section 5 Architectural for building layouts and naming conventions. Table 7.1 provides a list of building spaces and the corresponding ventilation, heating and air conditioning requirements. 7-1

76 Section 7 Heating, Ventilation and Air Conditioning Table 7-1. Building Spaces Building Room/Area Incinerator Building Ventilation Heat Incinerator Areas (All Levels) X X 1 Biosolids Handling Building Blower Room X X Centrate Well X X Skimmings Handling Area X X Polymer Handling Area X X Mechanical Rooms X X Parts Room X X Air Conditioning Maintenance Work Area X X 2 Centrifuge Feed Wet Well X X Centrifuge Feed Pump Room X X Control Room X X Vestibule X X Laboratory X X Offices X X Electrical Substation Room X X 3 Cake Feed Room X X Men's, Women's, Manager's Locker Rooms X 4 X X Electrical MCC Room X 3 X Centrifuge Room X X Lunchroom X X Communications Room X X Truck Loading Facility Truck Loading Area X 4 X 4 Cake Storage Room X X Notes: 1. Heat for tempering outside air and periods when incinerators are not functioning. 2. As the Maintenance Work Area is an occupied space located in the otherwise ventilated-only basement of the Dewatering Building, it should be fully enclosed to temper the air for occupancy. 3. Heat for periods of equipment inactivity. 4. Exhaust ventilation in all toilet, locker and shower rooms. 7-2

77 Section 7 Heating, Ventilation and Air Conditioning 5. Vehicle exhaust is handled via open vehicle doors, with provision for vehicle exhaust hose connection through door outlet. Ventilation is for general purposes of the loading process only. Gas fired unit heaters in truck loading area operate only when outside doors are closed Codes and Standards The design shall conform to the latest editions of the following codes and standards: OBC Ohio Building Code OPC - Ohio Plumbing Code OMC - Ohio Mechanical Code ASHRAE American Society of Heating, Refrigerating and Air-Conditioning Engineers NEC National Electrical Code NFPA National Fire Protection Association NFPA 82 Incinerators & Waste Handling Systems NFPA 820 Fire Protection in Wastewater Treatment Facilities OSHA Occupational Safety & Health Association Recommended Standards for Wastewater Facilities (The Ten State Standards) Outdoor Design Parameters The outdoor design conditions are as follows: Winter: 1 degree F Dry Bulb Summer: 91 degrees F Dry Bulb/73 degrees F Wet Bulb The indoor design temperatures are provided in the description of the various areas later in this Section Building Heating System Heating for the whole building will be provided by a new heating hot water system. This system will consist of a new steam-to-water heat exchanger, heating hot water pumps, HV units and unit heaters and baseboard heaters. Steam supply and steam condensate for the heat exchanger will be piped from the adequate size steam and condensate lines located near the Biosolids Handling and Incineration Building at the intersection of Tunnel 5 and 15. Existing steam pressure will be reduced to 25PSI steam pressure by means of a steam pressure reducing station, located in the Basement Mechanical Room. Condensate pumps will be utilized to return steam condensate back to the existing condensate line outside of the new Biosolids Handling and Incineration Building. All new heating equipment will be sized to provide sufficient heat during cold months. 7-3

78 Section 7 Heating, Ventilation and Air Conditioning Because the anticipated atmosphere in the Biosolids Handling and Incineration Building will be moist and corrosive, the new unit heaters and HV units in the Incinerator Areas will be stainless steel with Heresite coated coils. Heating hot water piping will be installed to each heating coil. A 3-way control valve will control each heating coil Dewatering Centrifuge Feed Pump Room The Centrifuge Feed Pump Room will be neutrally pressurized relative to ambient and the design will be based on an indoor design temperature of 60 degrees F in winter and 104 degrees F in summer. This area will be ventilated at the rate of 6 air changes per hour during winter and 12 air changes per hour in the summer to maintain maximum space temperature of 104 degrees F. The HVAC system will consist of an exhaust fan and a Heating and Ventilating (HV) unit with hot water heating coil. The HV unit will be located in the Basement Mechanical Room and a supply duct will be installed through the Dewatering Basement Area. The exhaust fan and HV unit will have 2-speed motors. The exhaust fan will be installed at grade on the North side of the Truck Loading Facility. The Centrifuge Feed Wet Well will be negatively pressurized relative to ambient and the design will be based on an indoor design temperature of 45 degrees F in winter and 104 degrees F in summer. This area will be ventilated at the rate of 12 air changes per hour year round. The HVAC system will consist of exhaust and supply fans. Both exhaust and supply fans will be installed at grade on the North side of the Truck Loading Facility. A distance of at least 10 feet will be maintained between supply and exhaust equipment. Due to the corrosive environment in the Wet Well, all ductwork and accessories shall be stainless steel. Heating will not be required Biosolids Handling Building Basement The Biosolids Handling Building Basement will be negatively pressurized relative to ambient and the design will be based on an indoor design temperature of 60 degrees F in winter and 104 degrees F in summer. This area will be ventilated at the rate of 6 air changers per hour year round. The ventilation system will consist of in-line exhaust fans and a HV unit located in the Basement Mechanical Room. Heating will be provided by utilization of hot water coil in the HV unit Incinerator Blower Room The Incinerator Blower Room will be neutrally pressurized relative to ambient and the design will be based on an indoor design temperature of 60 degrees F in winter and 104 degrees F in summer. This area will be ventilated based on the equipment heat gain into the room to maintain maximum space temperature of 104 degrees F. The ventilation system will consist of in-line exhaust fans, located in the Basement Mechanical Room. The exhaust fans will be interlocked with outside air intake louvers motor installed in the 7-4

79 Section 7 Heating, Ventilation and Air Conditioning outside wall on the North side of Cake Feed Room. Outside air (O.A.) intake duct will run down through the ground floor into the Basement of the Biosolids Handling Building. The O.A. intake duct will run through the basement to the Incinerator Blower Room. Because of the excessive equipment heat gain and the interior location of this room, heating will not be required. The air requirement for the blowers in this room will be from 20,000 to 60,000 scfm when all three incinerators are in service. There will also be a separate air plenum for odorous air from the Biosolids Handling and Truck Loading processes, which will be added to the air intake of the Fluidizing Air Blowers. See Section 10 Odor Control for more information Basement Mechanical Room The Basement Mechanical Room will be neutrally pressurized relative to ambient and the design will be based on an indoor design temperature of 60 degrees F in winter and 104 degrees F in summer. This area will be ventilated at the rate of 6 air changes per hour in the summer to maintain maximum space temperature of 104 degrees F. The ventilation system will consist of a propeller wall mounted exhaust fan interlocked with an outside air intake louver motor. Heating will be provided by use of hot water unit heaters during winter period to maintain design temperature. The basement will be extended to accommodate intake and relief air under the occupied ground floor areas to the relief and intake louvers installed in area wells at the north and east sides of the Biosolids Handling Building Basement Parts Room The Basement Parts Room will be neutrally pressurized relative to ambient and the design will be based on an indoor design temperature of 60 degrees F in winter and 104 degrees F in summer. This area will be ventilated at the rate of 4 air changes per hour in the summer to maintain maximum space temperature of 104 degrees F. The ventilation system will consist of an in-line exhaust fan interlocked with damper motor in the outside air intake duct coming from Basement Mechanical Room. Heating will be provided by use of hot water unit heaters during winter period to maintain design temperature Cake Feed Room The primary space of the Cake Feed Room will be negatively pressurized relative to ambient and the design will be based on an indoor design temperature of 60 degrees F in winter and 104 degrees F in summer. This area will be ventilated at the rate of 6 air changes per hour in the winter and 12 air changes per hour in the summer to maintain maximum space temperature of 104 degrees F. The HVAC system will consist of exhaust fans and a HV unit. The HV unit will be located in the Basement Mechanical Room. The supply duct will be routed in the duct chase up from the Basement. Wall mounted propeller exhaust fans will be installed on the North wall of the Cake Feed room. The 7-5

80 Section 7 Heating, Ventilation and Air Conditioning exhaust fans and HV unit will have 2-speed motors. The hot water coil in the HV unit will provide heating for the space Electrical Substation Room The Electrical Substation Room will be neutrally pressurized relative to adjacent spaces and the design will be based on an indoor design temperature of 60 degrees F in winter and 104 degrees F in summer. This area will be ventilated based on the equipment heat gain into the room to maintain maximum space temperature of 104 degrees F. The ventilation system will consist of wall mounted propeller exhaust fans, located in the West wall of the room. Exhaust fan will be interlocked with the outside air intake louvers motors installed in the outside wall on the West side of the Electrical Substation Room. Because of the excessive equipment heat gain, heating will be provided for periods of equipment inactivity Electrical MCC Room The Electrical MCC Room will be air conditioned and the design will be based on an indoor design temperature of 72 degrees F in winter and 75 degrees F in summer. Space will be positively pressurized relative to the adjacent spaces. The cooling load calculations will be based on the equipment heat gain into the room to maintain maximum space temperature of 75 degrees F. The air conditioning unit (ACU) will be installed on the roof. A heating hot water coil in the ACU will provide heating for the space to maintain design temperature. The ACU shall provide minimum outside air (O.A.) based on the minimum requirements per OMC Centrifuge Room The Centrifuge Room will be negatively pressurized relative to ambient and the design will be based on an indoor design temperature of 60 degrees F in winter and 104 degrees F in summer. This area will be ventilated based on the equipment heat gain into the room to maintain maximum space temperature of 104 degrees F. The ventilation system will consist of roof mounted exhaust fans interlocked with the outside air intake louvers motors installed in the outside wall of the Centrifuge Room. Because of the excessive equipment heat gain, heating will not be required in this room Control Room The Control Room will be air conditioned and the design will be based on an indoor design temperature of 72 degrees F in winter and 75 degrees F in summer. The space will be positively pressurized relative to the adjacent spaces. The cooling load calculations will be based on the equipment heat gain into the room to maintain maximum space temperature of 75 degrees F. An air conditioning unit (ACU) will be installed on the roof. The ACU will include a heating hot water coil to provide heating for the space to maintain design temperature. The ACU unit shall provide minimum outside air (O.A.) based on the minimum requirements for people per OMC. 7-6

81 Communications Room Section 7 Heating, Ventilation and Air Conditioning The Communications Room will be air conditioned and the design will be based on an indoor design temperature of 72 degrees F in winter and 75 degrees F in summer. The space will be positively pressurized relative to the adjacent spaces. The cooling load calculations will be based on the equipment heat gain into the room to maintain maximum space temperature of 75 degrees F. An ACU will be installed on the roof. The ACU will include a heating hot water coil to provide heating for the space to maintain design temperature. The ACU unit shall provide minimum outside air (O.A.) based on the minimum requirements for people per OMC Lockers, Toilet and Shower Rooms All Locker, Toilet and Shower Rooms will be ventilated for exhaust. The rate of ventilation shall meet the OMC requirements. The ventilation system will consist of roof mounted exhaust fans. Exhaust fans will be thermostatically controlled. Make-up for the exhaust will be provided from the air conditioning system for the adjacent spaces. Heating will be provided by use of hot water baseboard heaters during winter period to maintain design temperature of 72 degrees F Service Support Areas, Future Offices and Lunch Room These areas will be air conditioned and the design will be based on an indoor design temperature of 72 degrees F in winter and 75 degrees F in summer. Space will be positively pressurized relative to the adjacent spaces. An ACU will be installed on the roof. The ACU will include a heating hot water coil to provide heating for the space to maintain design temperature. The ACU unit shall provide minimum outside air (O.A.) based on the minimum requirements for people per OMC Incineration Incinerator Areas All levels of the Incinerator Area will be neutrally pressurized relative to ambient and the design will be based on an indoor design temperature of 60 degrees F in winter and 104 degrees F in summer. All areas will be ventilated at the rate of 6 air changes per hour during winter and a minimum of 12 air changes per hour in the summer to maintain maximum space temperature of 104 degrees F. The HV system will consist of combination of roof mounted exhaust fans and outside air intake louvers with motor operated dampers and roof mounted Heating and Ventilating (HV) units with hot water heating coil. Rooftop equipment will be located between the Incinerator stacks and be placed a minimum 10 feet away from the edge of the roof, with exhaust and intake equipment openings at least 10 feet away from each other. Exhaust fans shall have 2- speed motors. Supply and exhaust ducts will run vertically from the roof down to the Basement. The location of vertical duct risers will be determined based on the coordination with process equipment and pipes layout and other trades. 7-7

82 Section 7 Heating, Ventilation and Air Conditioning 7.4. Truck Loading Truck Loading Area The Truck Loading Area will be neutrally pressurized relative to ambient and the design will be based on an indoor design temperature of 55 degrees F in winter and 104 degrees F in summer. This area will be ventilated at the rate of 12 air changes per hour in the summer to maintain maximum space temperature of 104 degrees F. The ventilation system will consist of wall mounted exhaust fans interlocked with outside air intake louvers motors. Heating will be provided by use of gas fired or infrared unit heaters, only during winter period with garage doors closed. Vehicle exhaust is handled via open vehicle doors, with the provision for a vehicle exhaust hose connection through a door outlet. It is noted that ventilation design is for general purposes of the loading process only Cake Storage Room The Cake Storage Room will be neutrally pressurized relative to ambient and the design will be based on an indoor design temperature of 60 degrees F in winter and 104 degrees F in summer. This area will be ventilated at the rate of 6 air changes per hour in the summer to maintain maximum space temperature of 104 degrees F. The ventilation system will consist of roof mounted exhaust fans interlocked with outside air intake louvers motors. Heating will be provided via hot water unit heaters during winter period to maintain design room temperature Skimmings Skimmings Handling Area Skimmings will be negatively pressurized relative to ambient and the design will be based on an indoor design temperature of 60 degrees F in winter and 104 degrees F in summer. This area will be ventilated at the rate of 6 air changes per hour during winter and 12 air changes per hour in the summer to maintain maximum space temperature of 104 degrees F. The HV system will consist of exhaust fan and Heating and Ventilating (HV) unit. The HV unit and exhaust fan will be located on the grade level on the West side of the building and supply and exhaust ducts will run in the duct chase down to the Skimmings Handling Area. The exhaust fan and HV unit will have 2-speed motors. A hot water coil in the HV unit will provide heating for the area Sitework All HVAC work will be done in buildings and tunnels. There will be no sitework involved. 7-8

83 Section 7 Heating, Ventilation and Air Conditioning 7.7. Digester A Steam and steam condensate pipes will be connected to the main lines on site through the tunnels. No other HVAC modifications will be required for Digester A Sludge Storage Tanks Sludge Storage Tanks (SSTs) #8 and #9 are currently provided with odor control for ventilation purposes. Under this project, SSTs #7 and #10 will also be used for biosolids storage, and will be ducted to the odor control equipment, in the event SSTs #7 or #10 are utilized. 7-9

84 8. Plumbing 8.1. General Plumbing Scope of Work Plumbing work will consist of storm, sanitary and domestic water supply systems, which will be designed for this building as required by Ohio Plumbing Code. Potable cold water supply will be connected to the plant main potable water line through the tunnel system. Reduced pressure backflow preventer will be provided on the cold water pipe coming into the Biosolids Handling and Incineration Building. Sanitary drain and cold and hot water supply systems will be designed for all Toilet, Lockers and Shower rooms. Each Toilet, Locker, Shower Room and Mechanical Room will have floor drain with trap primer connection. A sump pump will be provided for sanitary drain lines that will be installed below the basement floor slab. A sump pump will be provided in each sump well and elevator pit. Floor drains will be installed at the process equipment as required. Floor drains will be trap primed to prevent sewer gases back up into the rooms and will be extended to sump pumps at the basement level or to the outside sanitary sewer system from grade and above-grade levels. A hot water heater will provide hot water to all plumbing fixtures that require hot water supply. The heater will be located in the Basement or Upper Mechanical Room as appropriate for the rooms being served. Cold water supply will be provided to all Process and HVAC equipment that requires water make-up. Water lines to the equipment will be installed with backflow preventers to protect potable water lines from contamination. Emergency shower and eyewash combination units will be provided in all Chemical Storage Areas and appropriate process areas. The emergency showers will utilize tempered water in compliance with ANSI Z Standard. The electric water heater with thermostatic mixing valve will provide tempered water for the emergency showers. A water heater will be installed in the Basement or Upper Mechanical Rooms as appropriate for the rooms and processes being served. 8-1

85 Codes and Standards The design shall conform to the latest editions of the following codes and standards: OBC Ohio Building Code OPC - Ohio Plumbing Code OMC - Ohio Mechanical Code Section 8 Plumbing ASHRAE American Society of Heating, Refrigerating and Air-Conditioning Engineers NEC National Electrical Code NFPA National Fire Protection Association NFPA 82 Incinerators & Waste Handling Systems NFPA 820 Fire Protection in Wastewater Treatment Facilities OSHA Occupational Safety & Health Association Recommended Standards for Wastewater Facilities (The Ten State Standards) 8.2. Dewatering Spaces requiring no plumbing include: Blower Room Electrical Substation Room Electrical MCC Room Control Room Communications Room Vestibule Office spaces Centrifuge Feed Pump Room The Centrifuge Feed Pump Room will be provided with floor drains with trap primer connections. Hose bibs will be installed for cleaning purposes. The sanitary line that will collect the floor drains in this area shall run to the sump pump located in the Basement Mechanical Room. No plumbing work will be required in the Wet Well area Dewatering Building Basement, including Skimmings Handling and Polymer Handling Areas All areas of the Dewatering Building Basement will be provided with floor drains. In containment areas, in order to contain any spillage, each floor drain will be fitted with a threaded pipe extending above the spill level for clean up or possible reuse. Once clean 8-2

86 Section 8 Plumbing up is completed the threaded pipe can be removed for final cleaning. The sanitary line that will collect the floor drains in this area shall run to the sump pump located in the Basement Mechanical Room. Hose bibs will be provided at the several locations. Cold water supply will be provided to all process equipment that requires water make-up. Water lines to the equipment will be installed with backflow preventers to protect potable water lines from contamination. Emergency shower and eyewash stations will be provided at strategic locations throughout this space. Additional process plumbing is addressed in Section 2, Process Basement Mechanical Room Domestic water heater and water heater for the emergency shower will be installed in the Basement Mechanical Room. Floor drains will be located at the pumps, Heating and Ventilating units, heat exchanger, backflow preventer and piped to the sump pump in the room. All of the floor drains will be trap primed. A reduced pressure backflow preventer will be installed on the main domestic water line coming into the building. A service/ utility sink will be provided with hot and cold water supply for maintenance purposes Cake Feed Room Floor drains are going to be installed and plumbed as required for the process equipment. Cold water supply will be provided to all process equipment that requires water make-up. Water lines to the equipment will be installed with backflow preventers to protect potable water lines from contamination. Emergency shower/eyewash station will be provided for this space Parts Room, Maintenance Work Areas and Upper Mechanical Rooms A floor drain will be installed and plumbed as required for service work. A service/utility sink will be provided with hot and cold water supply Centrifuge Room Floor drains are going to be installed and plumbed as required for the process equipment. Cold water supply will be provided to all process equipment that requires water make-up. Water pipes to the equipment will be installed with backflow preventers to protect potable water lines from contamination. An emergency shower and eyewash station will be provided for this space Laboratory, Lockers, Toilet and Shower Rooms A complete hot water, cold water, sanitary drain and vent plumbing system will be designed for the Laboratory, all Toilet, Locker and Shower Rooms. Design will comply with all code and ADA requirements. 8-3

87 Lunch Room Section 8 Plumbing Plumbing fixtures and kitchen equipment in the Lunch Room will be plumbed and installed and will comply with the latest Plumbing Code requirements Incineration Incinerator Areas All required process equipment and work areas will be provided with floor drains with trap primer connections. Hose bibs will be installed for cleaning purposes at the basement level. Hose bibs and floor drain will be installed and plumbed throughout the Incinerator Areas as required for process areas and equipment. Cold water supply will be provided to all process equipment that requires water make-up. Water lines to the equipment will be installed with backflow preventers to protect potable water lines from contamination. Emergency shower and eyewash stations will be provided at appropriate locations throughout this space Ash Sump The ash sump is a process area. See Section 2, Process for additional information Caustic Storage Area Emergency shower and eyewash stations will be provided Truck Loading Truck Loading Area Frost proof hose bibs will be provided in the truck loading area. Catch basins will be placed along the center of the truck bay and will be tied to the sanitary drain system. Oil and sand interceptor shall be installed on this line. Interceptor will be installed underground outside of the Truck Loading Area. Biosolids spillage that may occur during the truck loading procedures are a natural material for which the sanitary drainage system is designed. Therefore, no additional process drainage is anticipated to be required Cake Storage Room Plumbing system will be provided for wash down and drainage of this area Skimmings Plumbing for the Skimmings Handling Area is addressed in the Dewatering/Biosolids Section

88 Section 8 Plumbing 8.6. Sitework Frost proof hose bibs will be provided at strategic locations around the Biosolids Handling and Incineration Building for general maintenance and service. A building perimeter foundation drainage system will envelope the complex and will be connected to the storm drainage system. Oil and sand interceptor shall be installed outside of truck loading area. Make-up cold water pipe will be installed to odor equipment located on the site Digester A Plumbing modifications and reconnections associated with the Digester A area are addressed in Section 5, Demolition 8.8. Sludge Storage Tanks No plumbing modifications will be required for the Sludge Storage Tanks. Water usage in this area will be process only. 8-5

89 9. Fire Protection 9.1. General Fire Protection Scope of Work This building will be protected with automatic sprinkler systems in accordance with the Ohio Building Code and NFPA 13. A corrosion-resistant sprinkler piping system will be installed in locations where chemicals, moisture or other corrosive vapors are present. The following automatic sprinkler systems are going to be utilized in this complex, based on NFPA 13 definitions: Wet Pipe Sprinkler System: a sprinkler system employing automatic sprinklers attached to piping system containing water and connected to water supply so that water discharges immediately from sprinklers opened by heat from a fire. Dry Pipe Sprinkler System: a sprinkler system employing automatic sprinklers attached to piping system containing air under pressure, the release from which ( as from the opening of a sprinkler) permits the water pressure to open a dry pipe valve, and the water then flows into the piping system and out in the opened sprinklers. Standpipe systems shall be provided as required by the Ohio Building Code and NFPA 14. Fire hose threads used in connection with standpipe systems shall be approved and shall be compatible with local Fire Department thread. Standpipe systems will be combined with automatic sprinkler systems. A fire pump will be provided based on the new fire protection system requirements. Electric fire pump assembly will be installed in a separate Fire Pump room located in the Basement of the Dewatering Building. An electric fire pump will be designed per NFPA 20. The fire pump assembly will include all controls, jockey pump and valves that necessary to control the pump operation. Fire Department test connection will be installed on the exterior of the building Codes and Standards The design shall conform to the latest editions of the following codes and standards: OBC Ohio Building Code OPC - Ohio Plumbing Code OMC - Ohio Mechanical Code ASHRAE American Society of Heating, Refrigerating and Air-Conditioning Engineers 9-1

90 Section 9 Fire Protection NEC National Electrical Code NFPA National Fire Protection Association NFPA 13 Installation of Sprinkler Systems NFPA 14 Installation of Standpipe Systems NFPA 82 Incinerators & Waste Handling Systems NFPA 820 Fire Protection in Wastewater Treatment Facilities OSHA Occupational Safety & Health Association Recommended Standards for Wastewater Facilities (The Ten State Standards) Fire Protection System Locations See Section 5 Architectural for building layouts and naming conventions. Table 9.1 provides a list of building spaces and the corresponding means of provided fire protection requirements. 9-2

91 Section 9 Fire Protection Table 9-1. Building Spaces Notes: Building Room/Area Incinerator Building Wet Pipe System Dry Pipe System Incinerator Areas (All Levels) X 1 X 2 Biosolids Handling Building Blower Room Centrate Well Skimmings Handling Area Polymer Handling Area Mechanical Rooms Parts Room Maintenance Work Room Centrifuge Feed Well Control Room Vestibule Laboratory Offices/Future Electrical Substation Room See Note 3 Cake Feed Room Men's, Women's, Manager's Locker Rooms Electrical MCC Room Centrifuge Room Lunchroom Unassigned/Future Stairwells X X Elevator Shafts Communications Room Truck Loading Facility Truck Loading Area X Cake Storage Room X X X X X X X X X X X X X X X X X X X X X Standpipes 1. High temperature classification and rate-of-rise sprinkler heads will be employed throughout the incinerator areas. 2. Standpipes may be required in the Incinerator Building due to building size and/or distances. 9-3

92 Section 9 Fire Protection 3. The Electrical Substation Room will be isolated from adjacent building areas with 2 hour fire-resistance-rated construction and equipped with an automatic fire detection and alarm system as an equivalency for a fire sprinkler system, as permitted by the OBC and NFPA 13. The dire detection system is addressed in Section 9.2. Dewatering See Section Incineration See Section Truck Loading See Section Skimmings See Section Sitework Fire Department Hose Connections will be provided on the building exterior. The main fire line will be connected to the main water line on site. A vault containing a double check backflow prevention assembly will be installed on the main fire line prior to entry into the building Digester A No fire protection work will be required for Digester A demolition work Sludge Storage Tanks No fire protection work will be required for the Sludge Storage Tanks. 9-4

93 10. Odor Control General The District has determined that the biosolids Thermal Conditioning (Zimpro) processing system will be decommissioned after the fluidized bed incinerators are in operation. The impact that this change will have on the generation, release and off-site migration of uncontrolled odors from identified unit operations were evaluated in TM-515 Odor Control Technology Evaluation. In the evaluation, the existing solids unit operations were evaluated to determine what odors are being produced by Southerly's existing biosolids unit processes, and assess potential alternatives to mitigate or control these odors Existing Odor Control System The existing odor control system for the Thermal Conditioning Atmospheric Separators consists of scrubbers followed by Vapor Combustion Units (VCUs) 1 and 2. The existing odor control system for the Thermally Conditioned Sludge Thickeners (TCSTs) consists of scrubbers in Odor Control Unit A, and for the Sludge Storage Tanks (SSTs), the odor control system consists of scrubbers in Odor Control Unit B. The odorous air from Odor Control Units A and B is routed to a common plenum and then into VCUs 3 and 4. The existing odor control system for the Sludge Dewatering Facility provides odor control for the sludge wet well, the centrifuges and belt conveyors. The odorous air is passed through scrubbers and into Vapor Combustion Units (VCUs) 5 and 6. The details on the existing odor control system can be found in TM-515 Odor Control Technology Evaluation Odor Sampling An odor sampling event was conducted on September 27 and 28, The purpose of the sampling was to document the odor potential of the Southerly raw primary and waste activated sludge. These air samples collected and analyzed are expected to represent the odors that the biosolids will produce once Zimpro has been decommissioned. A reactive sulfide test was carried out on four separate samples collected from the low flow sludge pump prior to the Zimpro process. The following analyses were conducted: Hydrogen Sulfide and Reduced Sulfur Compound Analysis 10-1

94 Odor Characterization Analysis Section 10 Odor Control The results of the analyses are presented in Tables 10-1 and 10-2 and are in-line with odors found at other treatment plants around the country. Table Biosolids Odor Evaluation Results (Odor Units) Biosolids Sample # Detection Threshold Recognition Threshold 1 11,000 7, ,000 15, ,900 8, ,000 8,000 Average 13,600 9,100 Table Biosolids Reduced Sulfur Analysis Results (ppm) Concentration (ppm) Biosolids Sample # Hydrogen Sulfide Methyl Mercaptan Dimethyl Sulfide Average Maximum New Odor Control System From the scheduling prospective, the District has decided that the Zimpro process be phased out of operation after the new fluidized bed incinerators are placed into service. It is the District s intent that only chemically conditioned, centrifuge dewatered biosolids be burned in the new incinerators. It is currently anticipated that once the new incinerators are online, the entire Zimpro system will be decommissioned. With the decommissioning of the Zimpro process, VCUs 1 and 2 will no longer be required and will be removed from service. In addition, with the decommissioning of the Zimpro process the TCSTs will no longer be needed, and will no longer need odor control. However odor control will continue to be required for SSTs 8 and 9. The new odor control system will consist of two parts. The first part is for the Biosolids Handling process and the second part is for the SSTs. 10-2

95 Section 10 Odor Control The odorous air from the Biosolids Handling areas will be collected and routed to the intake plenum for the Fluidizing Air Blowers. The air will be used as fluidizing air for the incinerators, and the odors will be combusted in the incinerators. The odorous air from the SSTs will be collected and treated in a new biofilter odor control system. The biofiltration odor control technology is described in TM-515 Odor Control Technology Evaluation and is shown in Figure Dewatering The new Biosolids Handling Building will house the centrifuges, the centrifuge feed wet wells, and the centrate wet well Centrifuges It was assumed that typically six of the eight new centrifuges would be operating and two would be standby. The centrifuges will be odor controlled by placing pick-up connections on the drop chutes of the units. Each centrifuge will be ventilated at a rate of 230 cfm/unit for the six operating units and 400 cfm/unit for the two standby units. The total ventilation associated with centrifuge operation is 2180 cfm (See Table 10-3). Table Centrifuge Dewatering Odor Control Ventilation Rate Dewatering Centrifuges Number of Units Ventilation Rate per Unit (cfm/unit) Ventilation Rate Total (cfm) Operating ,380 Standby Total , Centrifuge Feed Wet Wells The new split wet well, Centrifuge Feed Wells East and West, will require odor control. The ventilation airflow rate for each wet well was initially determined based on an air exchange rate within the open airspace of the wet well of 12 air changes/hour (AC/hr). For this report, five feet of freeboard was selected. Accordingly each Centrifuge Feed Wet Well will require a ventilation rate of 600 cfm (See Table 10-4.) Centrate Wet Well The new Centrate Wet Well will require odor control. The ventilation airflow rate for each wet well was initially determined based on an air exchange rate within the open airspace of the wet well of 12 air changes/hour (AC/hr). For this report, ten feet of freeboard was selected. Accordingly the Centrate Wet Well will require a ventilation rate of 2,100 cfm (See Table 10-4.) 10-3

96 Section 10 Odor Control Table Biosolids Handling Building Wet Wells Odor Control Ventilation Rate Dewatering Building Wet Wells Ventilation Rate (cfm) Sludge Feed Pump 1,200 Centrate 2,100 Total 3, Incineration No odor control will be required for equipment located in the Incinerator Building. However, the odorous air from the centrifuge feed well, centrifuges, intermediate bins, dewatered biosolids silo and skimmings tanks will be collected and used as intake air for the Fluidizing Air Blowers to be incinerated in the FBIs Truck Loading The new Truck Loading Facility is intended to act as a second or emergency option for processing the biosolids after centrifuge dewatering. Normally, the dewatered biosolids will be sent to the fluidized bed incinerators. During times of peak biosolids production, which could occur up to 3 or 4 weeks per year, and during forced or maintenance shutdown of the incinerators, the dewatered cake will be sent to the storage silo in the Truck Loading Facility, or in extreme emergencies delivered directly to a truck. From the storage silo the dewatered biosolids will be loaded onto trucks for disposal and/or subsequent processing at an off-site facility. Pursuant to the anticipated infrequent operation of the truck loading facility, active odor control of the truck loading space within the facility is not proposed at this time. Proper ventilation of the building space is required and will consist of providing ventilation at a rate equivalent to 12 AC/hr in the worker occupied space of the building, for a total air flowrate of the general room air of 46,800 cfm. It has been noted that during the periods of time that the truck loading facility is operating, that an elevated risk of off-site odor release exists. Based on the potential for the biosolids to be stored in the storage silo for extended periods of time, thereby greatly increasing the odor generation and release potential from this source, active odor control will be provided for the storage silo. The ventilation rate for the storage silo was determined by applying 6 air changes per hour to the empty volume of the silo. The calculated ventilation rate for the storage silo is 700 cfm (See Table 10-5). 10-4

97 Section 10 Odor Control Table Truck Loading Facility - Storage Silo Odor Control Ventilation Rate Truck Loading Facility Number of Units Ventilation Rate per Unit (cfm/unit) Ventilation Rate Total (cfm) Storage Silo Skimmings The new Biosolids Handling Building will include an area for skimmings storage and pumping that it will share with polymer storage. Since the skimmings storage tanks and pumps are part of an enclosed network, the general room air in this area of the building does not need to be odor controlled and can be vented freely to the ambient atmosphere. The enclosed tanks will require odor containment and control. To capture the odors from the two skimmings tanks, the ventilation rate was determined by applying 6 AC/hr to the volume equivalent to an empty tank. Accordingly the ventilation rate for a single skimmings tank is 300 cfm/tank, and the total ventilation for the two skimmings tanks is 600 cfm (See Table 10-6). Table Skimmings Handling Area - Storage Tanks Odor Control Ventilation Rate Skimmings Handling Area Number of Units Ventilation Rate per Unit (cfm/unit) Ventilation Rate Total (cfm) Storage Tanks Sitework Sitework for odor control will include routing of new FRP ductwork from the SSTs to the new odor control biofilter Digester A No odor control modifications will be required for Digester A Sludge Storage Tanks There are currently two Sludge Storage Tanks (SSTs) that are odor controlled, #8 and #9, which are used to store solids from Easterly as well as thickened primary and waste activated solids from Southerly. The tanks have aluminum geodesic dome covers. The ventilation rate of the SSTs was determined base on the selected air change rate of

98 Section 10 Odor Control AC/hr for the air space between the surface of the solids in the tank and the geodesic dome covers. Applying the selected air change rate to the total full-tank airspace volume under the domes of 105,000 cubic feet yields a ventilation rate of 10,500 cfm/tank and total ventilation rate for the SSTs of 21,000 cfm (See Table 10-7). Currently the area beneath the cover is a confined space. If desired, it would be possible to increase ventilation capacity to allow workers to more easily enter the enclosed area, and/or position ventilation supply registers above the access walkway and central motor platform to supply fresh air to the workers at the positions they are likely to work. Two other SSTs, #7 and #10, may be placed into service during times of peak solids production. This period of time will be infrequent and relatively short (2-3 weeks), so no separate odor control facilities will be provided for these two tanks. These tanks will, however, be ducted to the odor control facilities for #8 and #9. If #7 and/or #10 are placed into service, the District will during such times reduce the amount of air being withdrawn from #8 and #9 to allow air to be drawn from #7 and/or #10 for some treatment of odors prior to discharge. Sludge Storage Tanks Table Sludge Storage Tanks Odor Control Ventilation Rate Number of Units Ventilation Rate per Unit (cfm/unit) Ventilation Rate Total (cfm) Sludge Storage Tanks 2 10,500 21, Odor Control Facilities Pursuant to the location of the various unit process odor sources requiring control and the relative small ventilation rates for some of the sources, two odor control facilities are planned for this project. The Sludge Storage Tanks will be gathered and provided treatment by a biofilter. The remaining sources of odor are all within the Biosolids Handling and Incineration Building and therefore will be collected and treated by incineration of the odorous air within the incinerators. A summary table of all the odor sources and the ventilation rates required to contain the odors at each source occurring within the Biosolids Handling and Incineration Building is presented in Table

99 Section 10 Odor Control Table Biosolids Handling and Incineration Building Odor Control Ventilation Rates Summary Source Dewatering Airflow (cfm) Operating Centrifuges (6) 1,380 Standby Centrifuges (2) 800 Total Dewatering 2,180 Biosolids Handling Building Wet Wells Centrifuge Feed Wet Wells (2) 1,200 Centrate Wet Well (1) 2,100 Total Biosolids Handling Building Wet Wells 3,300 Truck Loading Facility Dewatered Biosolids Storage Silo (1) 700 Skimmings Handling Area Storage Tanks (2) 600 Overall Total Odor Control Ventilation Rate 6,780 The biofilter odor control facility for the SST tanks will be sized to treat the ventilation rate of 21,000 cfm. As defined in TM-515, the combined, central odor control system concentrations and mass loading for the compounds of concern based on the limited sampling conducted at the Southerly WWTC are presented in Table Table Design Odor Inlet Concentration and Mass Loadings Compound Concentration (ppm) Total Mass Loading (lbs/day) Hydrogen Sulfide Methyl Mercaptan Dimethyl Sulfide The recommended odor control technology defined in TM-515 is a package biofilter, illustrated in Figure The process and design features of the biofilter are presented in Tables and 10-11, and are based on a biofilter system manufactured by Biorem. 10-7

100 Section 10 Odor Control Process Parameter Duty Climate Inlet Air Temperature Total Airflow Volume Table Biofilter Process Parameters Value Average Inlet RH 98% Average Inlet Particulate Concentration Type of Containment Average H 2S Maximum H 2S Removal Methyl Mercaptan Dimethyl Sulfide Inlet Odor Level Anticipated Odor Removal Continuous Ohio, USA F 21,000 ACFM, 10,500 ACFM per cell None H 2S 1.5 ppmv 5.0 ppmv 99% or less than 100 ppbv at outlet 2.9 ppmv 0.2 ppmv Not specified 90% removal for inlet levels < 10,000 OU and > 3,000 OU <300 OU at outlet for inlet levels < 3,000 OU Design Parameter Model of Biofilter Media Depth Empty Bed Residence Time Table Biofilter Design Parameters Value Based on BIOFILTAIR TM (Biorem ) 6 ft 40 seconds Media Volume 14,000 ft 3 Biofilter Footprint Two cells each 1200 ft 2 Media Life (guaranteed) Water Consumption (Humidification), gpm Water Consumption (Irrigation), gpm Water Supply Connection Drain Piping Connection Electrical (V) Fan (HP) Fan Rating Static Pressure 10 years ~2-4 gpm, continuously ~20 gpm, intermittently (twice for 25 min/day) 1 inch diameter 2-4 inch diameter 460V, 120V 50 HP-FRP backward inclined 12 W.C. 10-8

101 Section 10 Odor Control In addition, the biofilter vendor will supply the essential biofilter system components, submittals and services as listed below: 14,000 ft 3 Biofilter media. Media is shipped separately in bulk, and stored on-site for installation by the Contractor. Acid-resistant concrete support grating. External FRP humidification systems, including recirculation pump. (2) internal media irrigation systems, one pre cell (1) Nema 4X 304L SS Main System Control Panel with relay logic for communication with PLC. (2) Nema 4X 304L Fan Control Panels with Hand/Off Auto controls and alarm/status lights. RFP Backward inclined exhaust fans. Equipment, instrumentation, and controls to properly operated and monitor the biofiltration system. The central odor control facility will consist of: Ductwork to convey the odors to the biofilter from the various contained odor sources. An air blower (fan) to provide the containment (negative air pressure) at the odor sources and to convey the odors to the central odor control system. A humidifier to raise the relative humidity of the collected odorous air to 98 to 100% RH before entering the biofilters. A biofilter, broken up into two equal operating cells. A biofilter irrigation system used to maintain the moisture level of the biofilter media bed. The central odor control system will be located within a TCST area and will occupy an area roughly 2400sq. ft. 10-9

102 11. Electrical General Electrical work for this project will include bringing in power for the Biosolids Handling and Incineration Building for process requirements, control, lighting and receptacles. Standby power needs are provided by the plant distribution system which has power supplied from two independent feeds as well as 12 megawatts of standby power generator capability. The electrical design will be in accordance with: NEC 2008 (NFPA ): National Electrical Code NEORSD Plant Automation Standards (as applicable) Overall Power Distribution Power for the new facilities in this project will be derived from the existing Southerly 13.2 KV plant power distribution system. The existing distribution system consists of five (5) distribution loop feeders, plus redundant feeds to the EMSC Facility. These loops are designated Loops A, B, D, E and F. Loop B provides power to the existing Thermal Conditioning, Dewatering, Incineration and Steam Generation Facilities. As part of this project, the Thermal Conditioning, Dewatering and Incineration process facilities will be abandoned, and the majority of the electrical loads will no longer be utilized. As such, it is envisioned that the new Biosolids Handling and Incineration Building will be connected to the same Loop B as the existing. (Refer to Figure 11-1 for the proposed interconnection of the new Biosolids Handling and Incineration Building into the existing distribution system.) Power for the new Biosolids Handling and Incineration Building will be routed via concrete encased duct banks to the new building. The 13.2 KV feeders will be connected in a loop fashion, similar to the existing distribution system. One significant difference between the new loop arrangement and the existing loop arrangement is proposed. The existing loops utilize load-break air switches to isolate portions of the loop. For this facility, the loop connection will consist of 15 KV-class vacuum circuit breakers. This arrangement allows for simplified maintenance activities, because individual breakers can be withdrawn without affecting adjacent sections of the switchgear lineup. In addition, the new Biosolids Handling and Incineration Building substations will be connected via double-ended feeders, also utilizing 15 KV vacuum circuit breakers (refer to Figure 11-2 for the proposed 13.2 KV distribution arrangement). Based on load 11-1

103 Section 11 Electrical information for this project, it is currently envisioned that three (3) unit substations will be required to provide power to the new facilities. Two (2) unit substations will be required for the Biosolids Handling Building, while one (1) unit substation will be required for the Incinerator Building. New substations are designated as follows: Substation KV Incineration Switchgear (see Figure 11-2) Substation Volt Biosolids Handling g Unit Substation A (see Figure 11-3) Substation Volt Biosolids Handling Unit Substation B (see Figure 11-4) Substation Volt Incineration Unit Substation (See Figure 11-5) In general, substation transformers are sized to allow operation of the facility while one transformer is out of service for maintenance or emergency purposes. Substations are configured in a main/tie/main arrangement for this purpose. Substations will be located in one, common Electrical Substation Room. This room is expected to be ventilated, but not air conditioned. This room will be separate from the Electrical MCC Room, where the MCC s, VFD s, PLC s and similar equipment is expected to be housed. (Refer to Figures 11-6 and 11-7 for preliminary room layout information.) Electrical Construction Materials - General The following represents a general discussion of electrical construction materials expected to be used for this project. Materials follow District standards, except where specifically noted. 15 KV class switchgear will consist of metalclad, draw-out vacuum switchgear and breakers. Breakers will be electrically operated, with 125 VDC operating voltage, station battery and redundant battery chargers. Overcurrent devices for medium voltage switchgear will be solid-state devices, similar to other units already installed at Southerly. Substation transformers will be VPI, dry type for installation indoors. Low voltage switchgear will consist of draw-out power circuit breakers with multi-function, solid state overcurrent protective devices. All circuit breakers will be manually operated. Transfer of the main and tie breakers will be manual, with key interlocks to prevent inadvertent paralleling. MCC s will utilize NEMA-rated starters and breakers. Busses will be 600 ampere, tinplated copper. Starters will be NEMA Size 1, minimum. Exposed conduits will be rigid aluminum. Encased conduits will be PVC Schedule 80. Elbows emerging from concrete encasement will be PVC-coated rigid galvanized steel. Duct bank encasement will be constructed of red-dyed, reinforced concrete. 11-2

104 Section 11 Electrical Fittings will be copper-free cast aluminum with aluminum conduit, PVC-coated RGS with PVC-coated RGS conduit, and PVC with PVC conduit. Covers for fittings will have neoprene gaskets and stainless steel screws. Stainless steel bolts and screws will be specified for all boxes and fittings, as well as all general hardware used for the electrical installation. Conduits will be mounted 1/4 off of all walls using clamp backs or strut. Appropriate spacers will be used to prevent corrosion where in contact with concrete or dissimilar metals. Conduits will be 3/4 minimum exposed, 1 minimum encased. Where flexibility is required, liquid-tight flexible metal conduit with integral ground will be used. Wire will be stranded copper, type XHHW-2. Wire sizes will be #14 minimum for control, #12 minimum for power. Shielded instrumentation wire will be two (2) or three (3) conductor #16 twisted shielded type for use with all analog signals. It will be permissible to combine control wiring. The following will be avoided: combined power and control, combined AC and DC, combined power (except where necessary and with proper de-rating), anything combined with telephone, data (communications) or similar special systems. Conduit wire fills will be designed for 90% of the allowable per the NEC (36% total fill). In general, conduit fill calculations will use the cross sectional area for Schedule 80 PVC (2008 NEC, Chapter 9) as the basis for calculating the cross sectional area for wire fills in conduits. Lighting will be 120 VAC, and as described within subsections 11.2 through Exit and emergency egress lights will be provided per NEC, NFPA 101 and where required by other codes. Exit lights will be LED style. Emergency lights will utilize integral battery packs and two lamp heads. Fixtures will have NEMA 4X housings in wet, damp or corrosive areas. Battery pack lighting will include test stations accessible from the floor (approximately 5 above the finished floor). Receptacles in any type of wet, damp, or outdoor area will be GFCI type. Typically receptacles are spaced so that a 25 extension cord can be used anywhere in the facility s process areas. Closer spacing will be used for finished areas. Available voltages are anticipated to be 120/208 volts, three phase, 4 wire for small loads (less than ½ HP), and 480 volts three phase, 3 wire otherwise. If required by special equipment, 120/240 volt, single phase transformers and panelboards will be provided. 11-3

105 Section 11 Electrical Motors less than 1/2 HP will be 115 VAC, single phase. In general, motors 1/2 HP and above will be 460 VAC, three phase. Motor enclosures will be TEFC (totally enclosed, fan cooled) or ODP (open drip-proof) as applicable for the service location, with a 1.15 service factor. All equipment in this project is expected to be low voltage (under 600 volts), except the incoming 13.2 KV power to the facility. Enclosures (other than conduit fittings or switch/receptacle boxes) will be as follows: NEMA 4X stainless steel in all areas, except: NEMA 1 or NEMA 12 in electrical rooms, control rooms, and other clean, dry, finished areas Controls (pilot devices) will be heavy duty, oil tight. Pilot lights will be push-to-test incandescent transformer type. Momentary pushbuttons with electrically held circuits will be utilized. Maintained contact circuits will not be used Dewatering As stated in paragraph , the Biosolids Handling Building will obtain redundantly supplied 480 VAC, 3-phase power from new Substation s 22 and 23 (Refer to Figures 11-3 and 11-4). These Substations will in turn feed several 480V, 3-phase, 3-wire motor control centers (MCCs), distribution panelboards, and 480V-208Y/120V step-down transformers for the various loads located in the Biosolids Handling Building. Power will be provided, as required, for all new process and HVAC equipment and associated controls and devices, general-purpose receptacles, as well as new interior and exterior building lighting for the Biosolids Handling Building Interior Lighting Fluorescent and metal-halide (MH) HID lighting will be used throughout the interior of the facilities. New MH fixtures will be provided with an integral quartz restrike lamp option as well as a borosilicate prismatic glass reflector sealed in a round metal housing that optically controls and reduces high angle direct glare. (After a power failure, and upon power return, the quartz lamps would instantly light providing partial illumination until the HID lamps cooled down enough to restrike.) Industrial wet location listed fluorescent strip fixtures will be utilized in all remaining process, mechanical, and electrical room areas. All fluorescent fixtures will be highefficiency electronic ballast type with T-8 lamps. Constantly illuminated night lighting circuits will be provided, where required. Local switching will be provided. Lay-in ceiling type 2 foot by 2 foot fluorescent high-efficiency, electronic ballast, T-8 U- lamp fixtures with deep cell parabolic lenses will be used for lighting in occupied spaces such as offices, control and communication rooms, corridors, locker rooms and 11-4

106 Section 11 Electrical restrooms, as well as storage areas. Local, multi-level manual switching will be provided in office-type spaces and where required. Emergency lighting and exit signage will be as described in paragraph and provided throughout all paths of egress. New wallpack type or emergency battery pack equipped fluorescent fixtures, or emergency ballasted fixtures matching the office-type fixture will be capable of providing a minimum of 1-footcandle of light at the floor for a minimum duration of 90 minutes. Minimum lighting levels will be designed as shown in Table Table Minimum Lighting Levels Location Stairways Process Areas Piping Galleries/Tunnels Electrical and Mechanical Rooms Office-type Spaces, including Control and Communications Room Corridors Toilets / Rest Area /Bathrooms Locker Rooms Janitor Closet Storage Room - Inactive Storage Room - Active Lighting Levels 10 FC 30 FC FC FC FC 20 FC 30 FC 30 FC 15 FC 5 FC 20 FC Exterior Lighting New MH type wallpack fixtures will be provided for outdoor building mounted site lighting. If determined appropriate, additional mast lighting will be included to cover any areas identified as deficient once the new building is taken into account. These lights will be controlled with a photocell/time clock/lighting contactor type arrangement Telecommunication System The telecommunication systems for this project will involve the system conduit and raceway infrastructure only. Telecommunications and data drop locations will be identified on the drawings, with directions to the electrical contractor to extend ¾ rigid aluminum conduits with pullwire to an accessible location. Final copper or fiber optic transmission cabling as well as front-end electronics for these systems (Telecommunications and Data) and their installation shall be by others. 11-5

107 Fire Alarm System Section 11 Electrical A fire detection and alarming system as well as a combustible gas detection system will be provided in all required areas within the facility. These systems will be designed to comply with the requirements of NFPA 820 Fire Protection in Wastewater and Collection Facilities. Duct type smoke detectors will be incorporated into the design to shut down all HVAC air handling equipment in the event of the detection of smoke in the supply or return of the equipment Fire Pump A reliable source of electric power will be provided for the new fire pump system capable of carrying indefinitely the sum of the locked-rotor current of the fire pump motor(s) and the pressure maintenance pump motor(s), and the full-load current of the associated fire pump accessory equipment. The electrical installation will comply with all requirements of NFPA 20 Standard for the Installation of Stationary Pumps for Fire Protection, as well as the latest edition of the National Electrical Code Incineration Power Distribution As previously stated, the Incinerator Building will obtain power from Substation 24. In general, equipment dedicated to a specific incinerator will be powered from a dedicated MCC and dedicated panelboard(s). As such, a power failure or fault on one side of the substation will not affect a complete incinerator train of equipment powered from the other side of the substation. In this manner, common-mode failures due to configuration and connection of the distribution equipment will be avoided. For common facility equipment (i.e. lighting, HVAC, sump pumps, etc.), these will be powered from a common MCC, with feeders from both sides of the substation to allow continuous service for this equipment. Plant personnel will be able to select where this MCC (and related distribution panelboards) receives power during maintenance and emergency conditions. (Refer to Figure 11-5 for preliminary configuration of the power distribution of the Incinerator Building.) Equipment Electrical equipment in the Incinerator Building will conform to subsection Electrical Room A common Electrical MCC Room will be provided for both the Biosolids Handling and Incineration facilities. This room is expected to house the MCC s, panelboards, lighting 11-6

108 transformers, PLC s, VFD s and related equipment for these facilities. This room is expected to be air conditioned, due to the equipment sensitivity to environmental conditions. (Refer to Figure 11-7 for preliminary layout of this room.) Interior Lighting Interior lighting for the Incineration Facility will conform to subsections and as applicable Exterior Lighting Exterior lighting will conform to subsection Telecommunication System Section 11 Electrical The telecommunication system for the Incineration Facility will conform to subsection Fire Protection System NFPA 820 requires the following fire protection measures for Incineration Facilities: Fire suppression system (i.e. sprinklers), hydrant protection and fire extinguishers. These will be provided as described in Section 9, Fire Protection. Duct type smoke detectors will be incorporated into the design to shut down all HVAC air handling equipment in the event of the detection of smoke in the supply or return of the equipment Truck Loading The Truck Loading Facility within the new Biosolids Handling and Incineration Building will obtain redundantly supplied 480 VAC, 3-phase power from the new 480V, 3-phase, 3-wire motor control centers (MCCs) being designed for the Biosolids Handling facility (Refer to subsection ). Any and all required distribution panelboards, and/or 480V- 208Y/120V step-down transformers for the various loads associated with the Truck Loading Facility within the new Biosolids Handling and Incineration Building will be provided, as required. Power will be provided, for all new process and HVAC equipment and associated controls and devices, general-purpose receptacles, as well as new lighting Lighting Industrial wet location and outdoor listed fluorescent and/or metal-halide (MH) HID lighting will be used throughout the Truck Loading Facility. The new fluorescent and MH fixtures will be provided with cold weather ballasts and wire guards. Local switching will be provided. 11-7

109 Section 11 Electrical Emergency lighting will be provided in all paths of egress. New wallpack type or emergency battery pack equipped fluorescent fixtures will be capable of providing a minimum of 1-footcandle of light at the floor for a minimum duration of 90 minutes. Lighting levels will be designed in the Truck Loading Facility per the requirements of the Illuminating Engineering Society (IES) Telecommunication System Telecommunication systems for this project will involve the system conduit and raceway infrastructure only. Telecommunications and data drop locations will be provided in the Truck Loading areas, where required, with directions to the electrical contractor to extend ¾ C rigid aluminum conduit with pullwire to an accessible location. Final copper or fiber optic transmission cabling as well as front-end electronics for these systems (Telecommunications and Data) and their installation shall be by the District s contractors Fire Alarm System A fire detection and alarming system as well as a combustible gas detection system will be provided in all required areas within the facility. These systems will be designed to comply with the requirements of NFPA 820 Fire Protection in Wastewater and Collection Facilities. Duct type smoke detectors will be incorporated into the design to shut down all HVAC air handling equipment in the event of the detection of smoke in the supply or return of the equipment within the Truck Loading Facility within the new Biosolids Handling and Incineration Building Skimmings The Skimmings Handling Area within the new Biosolids Handling and Incineration Building will obtain redundantly supplied 480 VAC, 3-phase power from the new 480V, 3-phase, 3-wire motor control centers (MCCs) being designed for the Biosolids Handling facility (Refer to subsection ). Any and all required distribution panelboards, and/or 480V-208Y/120V step-down transformers for the various loads associated with the Skimmings Handling Area will be provided, as required. Power will be provided, for all new process and HVAC equipment and associated controls and devices, general-purpose receptacles, as well as new lighting Lighting Industrial wet location listed fluorescent lighting will be used throughout the Skimmings Handling Area. Hazardous location listed fixtures will be used in all required areas. Local switching will be provided. 11-8

110 Section 11 Electrical Emergency lighting will be provided in all paths of egress. New wall pack type or emergency battery pack equipped fluorescent fixture will be capable of providing a minimum of 1-footcandle of light at the floor for a minimum duration of 90 minutes. Lighting levels will be designed in the Skimmings Handling Area per the requirements of the Illuminating Engineering Society (IES) Telecommunication System Telecommunication systems for this project will involve the system conduit and raceway infrastructure only. Telecommunications and data drop locations will be provided in the Skimmings Handling Area, where required, with directions to the electrical contractor to extend ¾ rigid aluminum conduit with pullwire to an accessible location. Final copper or fiber optic transmission cabling as well as front-end electronics for these systems (Telecommunications and Data) and their installation shall be by others Fire Alarm System A fire detection and alarming system as well as a combustible gas detection system will be provided in all required areas within the facility. These systems will be designed to comply with the requirements of NFPA 820 Fire Protection in Wastewater and Collection Facilities. Duct type smoke detectors will be incorporated into the design to shut down all HVAC air handling equipment in the event of the detection of smoke in the supply or return of the equipment within the Skimmings Handling Area within the new Biosolids Handling and Incineration Building Sitework Sitework related to the Electrical portion of the project consists primarily of the ductbank interconnections from the existing 13.2 KV main power distribution system (loop B) to the new Substation #21 located at the new Electrical Substation Room. These interconnections will consist of two (2) ductbanks, separated by not less than 2 to carry the redundant feeders. Separation will be maintained to minimize the possibility of a common mode failure. Ductbanks will be reinforced concrete, with integral red-dye. Ductbanks will be routed from near the existing Incinerator Auxiliaries Building toward the east, then south of the Maintenance Building toward the east to the new Biosolids Handling and Incineration Building Digester A See Section 5 Demolition for electrical and communications relocation work in this area. 11-9

111 Section 11 Electrical Sludge Storage Tanks Sludge Storage Tanks (SSTs) #8, #9 and #10 have existing mixing equipment. New electrical service will be provided for new mixing equipment in SST #7. The electrical service provided for the SSTs will be explosion proof. After Vapor Combustion Units (VCUs) 3 and 4 have been removed from the Thermally Conditioned Sludge Thickener VCU Building, the ventilation equipment for the new biofilter odor control system will be installed in the building. The new equipment is anticipated to utilize the existing electrical service

112 12. Civil General Location The civil/site work will be concentrated in the area of the abandoned Digester Unit A. The east-west project limits generally lie between Road B and the Thermal Conditioning Building, and the north-south project limits lie between Road Q and the Sludge Storage Tanks. Figure 12-1 shows the overall project area. The area of improvements is shown in more detail in Figure Topography Ground elevations in the roadway and storm water collection system areas range from to The ground slope is generally downward from north to south, with the Old Ohio Canal and the Cuyahoga River being located at the southernmost edge of the site Drainage The Civil Site project area is located in the plant s existing drainage area identified as Drainage to Process (Area 2). This drainage network ultimately outlets to the Cuyahoga River by way of side by side 102 and 108 conduits. All proposed drainage structures shall be designed to tie into the existing network Existing Structures The north edge of the project area is defined by Road Q. On the south, the project is bounded by the Sludge Storage Tanks and the Vapor Combustion Building. On the west are two electrical towers and on the east is Road B. Underground structures in the area include ductbanks that connect Substations No. 4, No. 5 and No. 10, and possible buried tanks that are located at the northwest corner of the site Proposed Work The existing digester unit is founded on a series of timber piles. The majority of these piles will be left in place when the unit is demolished. The proposed Biosolids Handling and Incineration Building will be founded on new steel H-piles, driven between the existing timber piles. Access to the new building will be provided from both Road B and Road Q. 12-1

113 Section 12 Civil The proposed civil work for the consists of: Providing site access drives for truck traffic to enter and exit the building site. Providing parking areas for the site. Providing walkways for access to the facility, if required. Providing a grading plan for the site. Providing a storm drainage system for the access roadways, drives and parking areas. The proposed storm sewer system will be tied into the existing drainage network. Providing water, sanitary and natural gas piping as required. Providing pipelines to carry ash slurry from the Incinerator Building along Road B to connect with the existing ash piping prior to its crossing Canal Road Dewatering An access drive and unloading area will be provided for polymer and skimmings delivery trucks. See Section Access Drives Incineration An access drive and unloading area will be provided for caustic and sand delivery trucks. See Section Access Drives. Ash piping will be installed as described in Section Ash Piping Truck Loading The Truck Loading Facility and an additional truck loading pad will be provided at the north side of the proposed Biosolids Handling and Incineration Building. A drain, which will be brought into the building as a sanitary drain line, will be provided in the loading pad and Truck Loading Facility to collect any spills that might occur during truck loading. This material would need to be conveyed back to the treatment plant for treatment. See Section Access Drives Skimmings The access drive and unloading area will be provided for skimmings trucks and will be the same as provided for the polymer deliveries. See Section Access Drives. 12-2

114 Section 12 Civil Sitework Access Drives Site access drives will designed as flexible industrial pavement with standard 6 concrete curbs. The pavement shall consist of a 1½ surface course, 1½ intermediate course, two 3 courses of bituminous base and a 6 aggregate base. 4 underdrain piping will be placed behind the curb to aid in sub-base drainage. See Figure Underdrains will outlet to the proposed storm drainage structures. Pavement widths and turning radii will be based on the WB-62 design truck Parking A parking area will be provided on the east side of the Biosolids Handling and Incineration Building, accessible from Road B. Standard 18 x 9 spaces with parking blocks shall be provided. If required, handicapped spaces will be provided. The pavement in the parking area shall consist of a 1½ surface course, 1½ intermediate course, 3 bituminous base and 6 aggregate base. See Figure A concrete pad/top of Effluent Chamber box is in the proposed paved parking area subjected to vehicular traffic. The concrete pad will be evaluated to see if it can be worked into the proposed grading of the parking, and also to check its structural capacity under vehicular loading Walkways A sidewalk will be provided to allow access to the Biosolids Handling and Incineration Building from the parking area. The walk will have a minimum width of 5 feet. An ADA compliant curb ramp will be provided for handicap access, if required. Maximum grades for the walks shall also be based on ADA regulations Grading Plan A plan for site grading will be developed to ensure that storm runoff is directed toward drainage structures, that ponding is controlled and site runoff is retained on the site. Ponding across drive entrances shall be avoided. All grading will be based on the proposed building pad elevation, which will be the high point of the site Storm Drainage In conjunction with the grading plan, a storm drainage system will be designed to convey storm runoff from the site. The proposed system will be tied into the existing system along Road B. It is proposed to use curb inlets along the drives and in the parking area to collect runoff. The system will be designed to flow 90% full for the 5 year storm event, with the 10-year storm event used as the check storm event. At this time, it is expected that two (2) new inlets will be required to collect runoff on the site and prevent water running onto Road B and Road Q. The inlets will be installed along the curbs of the 12-3

115 Section 12 Civil drives to prevent them being subjected to traffic loads. If the existing catch basin located in the proposed parking area is found to be in good working order, it will be adjusted to the new grade and re-used Underground Utilities A layout will be provided to show proposed piping and connections for underground utilities, including water, sanitary sewers and natural gas, as required. Existing utility lines will be shown in the plan, based on existing plans. The majority of underground utilities are water lines which are located throughout the project area, as well as through the proposed building site. There is an existing gas line which runs along Road B and another which is located in the open area west of the digesters, marked out by bollards. There is also an existing sanitary line in the area of the proposed pavement, but this is assumed to be sufficiently deep as not to pose an issue for the new construction. Every effort will be made to avoid conflicts with the existing utilities in the design of the new facilities. Underground electric lines are present on the east side between proposed Biosolids Handling and Incineration Building and Road B. Disposition of underground electric and other utilities will be one of the important tasks and will be addressed once the proposed building layout is finalized Ash Piping The proposed Biosolids Handling and Incineration Building will include an ash sump to collect ash from the biosolids processing. This ash will be mixed with water to form a slurry that must be transported to the existing ash lagoons for settling. Piping for the ash will be located at the southeast corner of the proposed Biosolids Handling and Incineration Building. The proposed system shall consist of two 12 pipes and will carry the ash from the Biosolids Handling and Incineration Building and along Road B to a point where it can be tied conveniently into the existing system. The proposed pipes would ultimately be used one line at a time. Connection to the existing ash lines will need to be phased. At least one of the existing ash pipes will have to remain in service for the existing incineration process, and one of the proposed pipes would be permanently tied into the existing system. Upon successful startup of the fluidized bed incinerators the remaining proposed pipe would be tied in resulting in both new lines being tied into the system. The remaining lengths of the existing lines would be abandoned in place. The civil design will include a layout of the new piping system Digester A Digester A will be demolished for this project. All required site work has been described in this Section, and in Section 5 Demolition. 12-4

116 Section 12 Civil Sludge Storage Tanks New ductwork will be required to connect Sludge Storage Tanks (SSTs) #7, #8, #9 and #10 to the new odor control system. See Section 10 Odor Control. No additional site/civil work will be required for the improvements to the Sludge Storage Tanks. 12-5

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135 SOUTHERLY FLUIDIZED BED INCINERATOR, BIOSOLIDS HANDLING, AND TRUCK LOADING FACILITY CONCEPTUAL BUILDING SECTION 'T' 'I' 'E' 'B' 'W' BUILDING BUILDING WING BUILDING WING Truck Loading Incinerator Building East Support Wing Biosolids Handling Building West Support Wing Tunnel roof EL T-roof roof level plan third second ground basement EL I-roof EL E-roof EL B-roof EL W-roof lunchroom, offices, cake storage room mech. centrifuge room offices, mech. incinerator EL E-3 EL B-2 EL W-3 EL T-2 locker rooms EL I-2 communications cake feed room elect. mcc room EL E-2 EL W-2 truck loading area control room, offices EL B-1 incinerator vestibule, lab elect. substation EL T-1 EL E-1 blower room, centrate well, EL W-1 EL I-1 mechanical room skimmings handling, centrifuge feed incinerator parts room polymer handling maintenance EL T-B EL I-B EL E-B EL B-B EL W-B (stair)* (stair)* (stair)* 15' 25' 35' 26' 22' 12' 15' 15' 15' 15' 20' 15' 25' 15' 15' 15' 15' third level plan second level plan ground level plan basement plan 10' EL Truck Loading Incinerator Building East Support Dewatering Building West Support Tunnel Notes: This Section is a composite graphic intended to show the relationship between building areas. It is NOT a true cross section drawing. Only two (2) stairs are proposed. Three are shown to graphically acknowledge vertical connection between adjacent floor areas. CONCEPTUAL BUILDING SECTION FIGURE 4-6

136 SOUTHERLY FLUIDIZED BED INCINERATOR, BIOSOLIDS HANDLING, AND TRUCK LOADING FACILITY SPACE DESIGNATIONS/ELEVATIONS AND ACCESS Building Level Plant Floor-To Service Passenger Building Area Floor Floor Elevator Elevator Stair Space/Room/Process Name Elev'n Height Access Access Access Comments Basement Level Incinerator Building EL Ft. Y NR Y Incinerator - Basement Level Ash Sump Caustic Storage Biosolids Handling Building EL Ft. Y Y Y Blower Room Centrate Well Skimmings Handling Area Polymer Handling Area East Service/Support Wing EL Ft. N Y Y Mechanical Room Parts Room West Service/Support Wing EL Ft. Y NR Y Maintenance Work Area Biosolids (Below Truck Loading Building) EL Ft. N N N Centrifuge Feed Well Tunnel 5 (Connection) EL Ft. N N N SEE CONCEPTUAL SECTION FOR GRAPHIC REPRESENTATION AND RELATIONSHIP OF AREAS AND FLOOR LEVELS. SPACE DESIGNATIONS & FLOOR ELEVATIONS FIGURE 4-7.1

137 SOUTHERLY FLUIDIZED BED INCINERATOR, BIOSOLIDS HANDLING, AND TRUCK LOADING FACILITY SPACE DESIGNATIONS/ELEVATIONS AND ACCESS Building Level Plant Floor-To Service Passenger Building Area Floor Floor Elevator Elevator Stair Space/Room/Process Name Elev'n Height Access Access Access Comments Ground Level Incinerator Building EL Ft. Y Y Y Incinerator - Level 1 Biosolids Handling Building (upper Basement Level) (25 Ft.) East Service/Support Wing EL Ft. NR Y Y Control Room Vestibule Building Entrance at grade (EL. 31.5) Laboratory Offices West Service/Support Wing EL Ft. Y N Y Electrical Substation Room Truck Loading Building EL Ft. N N N Grade truck access. Truck Loading Area Second Level Incinerator Building EL Ft Incinerator - Level 2 Biosolids Handling Building EL Ft. Y* Y Y Alternate to Service Elev. Is monorail into truck loading area Cake Feed Room East Service/Support Wing EL Ft. NR Y Y Men's, Women's & Manager's Locker Rooms Communications Room West Service/Support Wing EL Ft. Y N Y Electrical MCC Room Truck Loading Building (upper 1st Flr) (25 Ft.) Y N Y SEE CONCEPTUAL SECTION FOR GRAPHIC REPRESENTATION AND RELATIONSHIP OF AREAS AND FLOOR LEVELS. SPACE DESIGNATIONS & FLOOR ELEVATIONS FIGURE 4-7.2

138 SOUTHERLY FLUIDIZED BED INCINERATOR, BIOSOLIDS HANDLING, AND TRUCK LOADING FACILITY SPACE DESIGNATIONS/ELEVATIONS AND ACCESS Building Level Plant Floor-To Service Passenger Building Area Floor Floor Elevator Elevator Stair Space/Room/Process Name Elev'n Height Access Access Access Comments Third Level Incinerator Building (upper Level 2) (22 Ft.) Incinerator - Level 3 Biosolids Handling Building EL Ft. Y* Y Y Alternate to Service Elev. Is monorail into truck loading area Centrifuge Room East Service/Support Wing EL Ft. NR Y Y Lunchroom Unassigned/Future Mechanical Room West Service/Support Wing EL Ft. Y Y Y Unassigned/Future Mechanical Room Truck Loading Building EL Ft Cake Storage Room Roof Level Incinerator Building EL N? N Y Parapet separated from Dewaterng - OSHA Access Ladder Stacks & Ventilators Biosolids Handling Building EL Y N Y (Common Roof) East Service/Support Wing EL (Common Roof) West Service/Support Wing EL (Common Roof) Truck Loading Building EL N OSHA Access Ladder SEE CONCEPTUAL SECTION FOR GRAPHIC REPRESENTATION AND RELATIONSHIP OF AREAS AND FLOOR LEVELS. SPACE DESIGNATIONS & FLOOR ELEVATIONS FIGURE 4-7.3

139 SOUTHERLY FLUIDIZED BED INCINERATOR, BIOSOLIDS HANDLING, AND TRUCK LOADING FACILITY SPACE REQUIREMENTS (Architectural) Programmed Area Personnel/ Approx Area (Sq. Ft./person) Unit Count Room Size (Sq. Ft.) Comments Control Room Preferrred grade floor location; outside views critical FBI/Dewatering Facilities Assumes shared workstations on central console HUB Facilities Assumes shared workstations on central console HUB Offices 1, ,000 (Allowance) Offices for HUB personnel x 40 3,600 Support Facilities Communications Room x 78 3,120 Include kitchen, vending area (3 machines), tables and chairs Lunchroom x Include kitchen, vending area (3 machines), tables and chairs Men's Locker/Shower/Toilet x 44 1,750 Assumes facilities for ±40 people; ±10 at a time Women's Locker/Shower/Toilet x Assumes facilities for 8 people; ±3 at a time Manager's Locker/Shower/Toilet (Single Unisex) x Assumes shared workstations on central console Maintenance Work Area x Workbench and cage dispersed in the facility. Building Entry/Vestibule/Airlock x Include kitchen, vending area (3 machines), tables and chairs General Office-Type Storage x Assumes facilities for ±40 people; ±10 at a time Elevators x Freight (10 x 10); 1 Passenger (5 x 8) Code-Required Stairs x Enclosed; connecting all floor levels 4,385 Spaces Not Included in Architectural Program Tabulation but Included in Project Area Incinerator Building 1 95 x ,375 Biosolids Handling Building 1 85 x ,175 Truck Loading Building 1 20 x 80 1,600 Electrical MCC Room 1 40 x 78 3,120 Electrical Substation 1 44 x 72 3,168 Primary Mechanical Room 1 30 x 49 1,470 Secondary Mechanical Rooms 2 15 x Fire Pump Room 1 15 x Blower Room 1 20 x 175 3,500 Parts Room 1 35 x 35 1,225 Total Listed Spaces 7,985 Circulation Factor: 39% 3,114 Total Net Assignable Area 11,099 Building Core Factor: 15% 1,665 Total Gross Building Area for Listed Architectural Spaces 12,764 Sq. Ft. SPACE REQUIREMENTS (Architectural) FIGURE 4-8

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