V C A E NGINEERS CIVIL STRUCTURAL MBE DBE SBE

Transcription

1 V C A E NGINEERS CIVIL STRUCTURAL MBE DBE SBE INC COUNTY OF LOS ANGELES MIRA LOMA DETENTION CENTER th Street West. Lancaster, CA January 23, 2015 Preliminary Site Water Supply and Distribution Analysis Narrative Prepared For: DLR GROUP 3130 Wilshire Blvd., 6 th floor Santa Monica, CA Prepared by: VIRGIL C. AOANAN, P.E., S.E., QSD 3951 Medford Street, CA Michelson Dr. # 242,, CA 92612

2 TABLE OF CONTENTS 1.0 INTRODUCTION BACKGROUND EXISTING SITE ANALYSIS AND RESEARCH EXISTING WELLS AT THE MIRA LOMA DETENTION FACILITY RESERVOIRS AND PUMP STATIONS WATER DEMAND AND DESIGN REQUIREMENTS FIRE FLOW AND FIRE SPRINKLER DEMAND/REQUIREMENTS DOMESTIC WATER DEMAND/REQUIREMENTS SITE UTILITY WATER STORAGE AND SUPPLY, UNDERGROUND SITE WATER DISTRIBUTION AND CONNECTIONS WATER STORAGE AND SUPPLY UNDERGROUND SITE WATER DISTRIBUTION AND CONNECTION CONCLUSION AND RECOMMENDATION PREFERRED ALTERNATIVE CONNECTION ALTERNATIVE OPTION - WATER STORAGE UNDERGROUND WATER DISTRIBUTION SYSTEM ANNUAL WATER CONSUMPTION APPENDIX EXHIBIT A EXHIBIT A EXHIBIT A EXHIBIT A Medford Street, CA Michelson Dr. # 242,, CA 92612

3 CIVIL STRUCTURAL MBE DBE SBE 1.0 INTRODUCTION This report summarizes the findings of the existing water supply system, the proposed water distribution system and the water storage system to supply the needs for the Mira Loma Detention Facility. VCA will examine the existing onsite water reservoir, pump stations, water supply, water demands of the proposed detention facility, and the design requirements for the fire sprinkler system. 1.1 BACKGROUND Mira Loma Detention Center is located in the City of Lancaster at the southeast intersection of West Avenue I and West 60th Street. This narrative report is based on available as-builts, evaluation report by Psomas, our site visits and other publications of the site related to the water distribution and supply for housing fire sprinklers, site fire hydrants, domestic and irrigation water lines within AB 900 project boundary. 1.2 EXISTING SITE ANALYSIS AND RESEARCH Based on as-built drawing review and previous field inspections conducted by VCA in 2008 and on April 2014, the following information were gathered and identified. The Mira Loma Water System is comprised of one 100,000 gallon capacity elevated water storage tank, one 400,000 gallon concrete surface reservoir, two abandoned 10,000 gallon hydro-pneumatic pressure tanks, four booster pumps, Well No. 3 with a 60 H.P. motor driven pump and Well No. 4 with a 150 H.P. natural gas fueled engine. Water is being fed to the site by an 8 asbestos cement pipe. A Water Map Titled Mira Loma Sheriff s Facility Plan of Primary Water System dated March 1959 acquired from the Facility Maintenance Bureau (See Exhibit A ) indicates that the site water system is a combined system serving both Domestic and Fire Water demands. The map indicates 12 fire hydrants are located around the area with one fire hydrant serving as a Fire Department Connection. The actual number of fire hydrants will need field verification. An existing underground utilities plan done by Fluor, approved in October 1987 (Exhibit A-2) shows that there is an extensive network of water lines servicing the detention facility, employee housing area, and the High Desert Health System. A visual inspection was also done in 2008 and on April 2014, but an additional survey should be done at this time to show and validate the current number of fire hydrants that are supplied by the primary water system. Utility alignment and underground utility line verification by ground penetration radar (GPR), potholing and other means are highly recommended for this validation. Along the adjacent streets lies the City Water System that is owned and operated by the LA County Waterworks, District No. 40, Antelope Valley located at 260 E. Avenue K-8, Lancaster. The County Waterworks has a 36 diameter Cement Lined Coated Steel Transmission Water Main located 25 feet from the property line along 60th Street (See Exhibit B ). Information gathered from the County shows that recent improvements along the West Avenue I includes a 12 diameter pipe installed 14 feet north of the road centerline (See Exhibit C ). VCA Engineers Inc 3951 Medford Street, CA Tel: Fax: vca@vcaengineers inc.com inc.com

4 Miscellaneous water site features such as existing fire hydrant, backflow devices, valves, FDC, PIV and other water features within the project boundary will be removed. Those water features that are servicing other buildings such as those outside of the project boundary, if any, should be relocated. Reuse will have to be identified by design and build contractor and should consult fire department or authority having jurisdiction if the material is in compliance with the current code, regulation, standard and still feasible for reuse. 1.3 EXISTING WELLS AT THE MIRA LOMA DETENTION FACILITY According to the Report on evaluation of two Existing Wells conducted by Psomas dated September 3, 2013, the following information were gathered: Well No. 3: 700 gallons per minute (gpm). 60 horsepower (hp). 1,780 revolutions per minute (rpm). Fairly new electric motor (approximately 1.5 years old). Cycles on level of lower reservoir. Age of Well is unknown but could be from 22 to 26 years old. Well No. 3 Pump and Connection 3951 Medford Street, CA Michelson Dr. # 242,, CA 92612

5 Well No. 4: On stand-by for emergency and can pump to either the lower reservoir or the upper reservoir. 1,000 gpm natural gas engine drive (Caterpillar engine G379). From one of the representatives during Psomas site visit (Operator Mr. Lee Russ of the L.A. County Sheriff s Dept. Water System) said that the engine is very old, has oil leaks but runs well. He runs it about an hour a week to keep it lubricated and ready when it needs to be used. It has a current South Coast Air Quality Management District (AQMD) certificate. No record were available for maintenance and age of the well. There is a third Well No.2, but is abandoned. 1.4 RESERVOIRS AND PUMP STATIONS Well No. 4 / Pump Housing Lower Reservoir: Located south and adjacent to the booster pump station on the surface. 400,000 gallon (gal.) capacity Rectangular building with the roof in poor condition that it is not safe to walk on. Three internal sedimentation cells at intake on the west side Three drains on the south side that go into the site storm drain system Overflow to the street in the middle on the west side Last cleaned in Medford Street, CA Michelson Dr. # 242,, CA 92612

6 400,000 gallon Lower Reservoir Upper Reservoir: Overhead steel tank tower approximately 100 feet above ground. Capacity of 100,000 gallons. Provides a constant pressure source for the water system in the detention center. Last cleaned in ,000 gallon Upper Reservoir 3951 Medford Street, CA Michelson Dr. # 242,, CA 92612

7 Booster pump station: Has four horizontal centrifugal pumps all the same size (Booster Pump A, B, C, and D): PACO, name plate data: Model YAG 95772B; 800 gpm; 120 ft. TDH; 11 inch impeller; ; All have 50 hp motors All pumps needs to be serviced/rehabilated. Booster Pump A: 450 gpm current pumping capacity. Inlet and outlet ranges from 4-in. to 8-in. diameter. Booster Pump B: zero to 45 gpm current pumping capacity. Inlet and outlet ranges from 4-in. to 8-in. diameter. Booster Pump C: 500 gpm current pumping capacity. Inlet and outlet ranges from 4-in. to 8-in. diameter. Booster Pump D: 375 gpm current pumping capacity. Inlet and outlet ranges from 4-in. to 8-in. diameter. Booster Pump Station and Reservoirs: No maintenance information. From their report, Psomas provided Concerns and Recommendations: Existing booster station cannot provide adequate flow and pressure to meet fire flow conditions. Generally, fire authority would recommend for a public institution a fire flow of 2,000 to 4,000 gpm. The existing water supply system can only provide 1,000 gpm to 1,200 gpm in its current condition. 2.0 WATER DEMAND AND DESIGN REQUIREMENTS NFPA indicates that Authority Having Jurisdiction (AHJ) has to be consulted in designing and sizing the water tank size and capacity. Though the potable water may not be the concern of the fire department, these water demands should be included in sizing the tank and capacity since the water storage is used for both fire and potable water usage. Factors to be included are the following: 1.) Fire sprinkler water demand and fire-fighting demand. 2.) Potable water for both domestic and irrigation demands. The plumbing engineer, mechanical engineer, landscape architect and fire protection engineer have to be consulted on the accuracy of the respective water demands to include their recommendations, calculation and analysis. The MEP and fire protection engineers should include in their analysis any other existing site and building demands outside of the project boundary area that may affect the new work. LACDPW instructed DLR in their meeting last April 25, 2014 to assume that existing hospital building is closed and off-line and not contributory to the proposed demands. Its future requirements for domestic or fire protection will be addressed if and when a reuse program is identified in the future. The DB contractor shall review this situation and will eliminate hospital building in their calculations unless new direction from LACDPW is received Medford Street, CA Michelson Dr. # 242,, CA 92612

8 The design should comply with the following reference code and standards: National Fire Protection Association NFPA 13, NFPA 22, the California Fire Code (CFC) 2013 and California Plumbing Code (CBC) FIRE FLOW AND FIRE SPRINKLER DEMAND/REQUIREMENTS The buildings on facility are simple pre-engineered building and are not sprinklered, with the exception of the administrative segregation building. Building improvements for both existing and new buildings under this project will be provided with fire sprinklers. Based on the current initial site plan within the AB 900 project boundary, the floor area of the most demanding building within the project boundary is found to be about 29,000 square feet. The fire flow and fire sprinkler requirements are based on the square feet of the floor area and by categorizing of the building s construction type, to be determined by the architect and finalized by design build contractor. Based on the architect s initial analysis, the classification of the buildings is Light Hazard. Under this classification Light Hazard and based on NFPA 13, (2), a minimum of 0.10 gpm/sf will be required. Kitchen/Storage per Fire Department has to be categorized as Ordinary Hazard but detailed classification of this building needs be finalized by the design and build contractor architect, MEP and fire protection engineer. Based on analyses for the greatest demanding building it is found that the kitchen is the building that requires the greatest fire sprinkler demand. Initial determination by Fire department is to use a minimum of 0.20 gpm/sf in calculating the fire sprinkler demand for kitchen/storage building. Using the information above and taking the higher values, we calculate the estimate of fire sprinkler water demand as follows: Fire Sprinkler water demand = 0.20 gpm/sf x 29,000 sf x 90 minutes x 1.2 (20% for losses) = 417,600 gallons. Type of construction for the building were categorized as Type IIB per Architect except for kitchen building. Taking into account the most demanding building floor area of the project, the needed fire flow coverage area is 29,000 square feet approximately. Kitchen building with a total floor area of 29,000 sf will require a fire flow of 3,500 gpm at 3 hours duration. Based on 2013 CFC Appendix B, B105.1, under Exceptions, a reduction in required fire flow of up to 50%, will be allowed when the building is provided with an approved automatic sprinkler system installed in accordance with Section or The resulting fire-flow based on the 50% reduction is 1,750 gpm and larger than the minimum 1,500 gpm for the prescribed on this section. For calculation - use the reduced fire flow 1,500 gpm with the duration of 3 hours to estimate the fire flow requirement. AHJ (Fire Department and Building & Safety Fire Protection Plan checker) will have to be consulted in determining the firefighting water demand that will be needed to calculate the additional capacity of the storage tank. However, we calculate the estimate of firefighting water demand as follows: Fire Fighting water demand = 1,750gpm x 3 hours x 60 min/hour x 1.2 (20% factor of safety) = 378,000 gallons. Therefore by combing the fire sprinkler and firefighting water demand, the Total Demand for fire water supply will be 795,600 gallons. The numbers provided herewith is for reference only and as a guide in determining water demand. Design and build contractor is responsible to analyze in detail the fire water demand both for fire hydrants and fire sprinkler system and should comply fire department requirements, code requirement and other jurisdictional requirements. Based on the initial information received from MEP, the flow could range from 500 gpm (minimum) to 3,500gpm and the minimum pressure for the fire at each building should be 65 psi (automatic sprinkler at 8 psi). Design 3951 Medford Street, CA Michelson Dr. # 242,, CA 92612

9 and Build contractor is advised to identify this conditions by coordinating with Authority Having Jurisdiction (AHJ) and in accordance to the code and standards. Note that detailed fire water demand requirement for fire sprinkler will have to be confirmed by the Design and Build contractor. Parameters and other requirements have to be coordinated and discussed with AHJ (Fire Department and Building & Safety Fire Protection Plan checker, etc.) to establish accurate fire sprinkler demand and firefighting requirement. The figures provided are based on our understanding on NFPA and 2013 CFC code and standard, and may not provide AHJ specific requirement, and is for reference and for estimating the demand volume only. Detailed demand has to be verified and calculated accordingly by the design and build engineer/contractor. 2.2 DOMESTIC WATER DEMAND/REQUIREMENTS. Domestic water demand is basically the amount of water required for domestic water use for users of the building. The numbers of building facilities such as toilets, shower rooms, sink, drinking fountain, kitchen usage, other domestic water use is determined by the architect, plumbing in compliance per code and standard, and information acquired from two women s detention facilities. Las Colinas Women s Facility and Century Regional Detention Facility, information provided on table 1. Detention Facility Location Inmate Population Water Consumption (gallon/day/inmate) Las Colinas Detention and Reentry Facility Century Regional Detention Facility, San Diego, California 1,270 (1) 115 (2) Lynwood, California 2,300 (2) (2) Table 1 (1) San Diego County Sherriff s Department; (2) Information provided by County Department of Public Works; Attachment 4.0, Exhibit A 3. An estimated domestic water usage of 112 gallons/inmates/day was used based on the average usage information from other similar women s detention facilities provided by the County. The attached Exhibit A-3 also provides information for the Mira Loma Detention Center, from , when the detention facility was used by the Immigration and Customs Enforcement. This data was not included as part of the estimated domestic water usage, since the existing campus water distribution supplies the detention facility as well as the existing adjacent hospital and existing health services buildings. The program on the Mira Loma Women s Detention Housing Capacity requires that the capacity meet 1,604 beds (inmates). Number of Staffs and Guards/Officers count also have to be finalized. For the purpose of estimating the daily water usage, an estimated 225 guards/staff was provided from the facilities program. The total number of users is estimated to be 1,829 (this includes the staffs and guards/officers). The estimated number user will change ones the number of staffs and guards/officers are fully determined to be permanently dedicated to Mira Loma Women s Detention facility Medford Street, CA Michelson Dr. # 242,, CA 92612

10 Using the 1,829 estimate: 1,829 users x 112 gallons/per inmates/day = 204,848 gallons/day Domestic Water Demand: = 204,848 gallons/day Therefore, the existing storage tank capacity should be able to provide or store 204,848 gallons per day for inmates and building users. The figures provided are based on estimated daily usage per inmates and per the estimated number of users of the facility and is for reference and for estimating the demand volume only. Consultation with AHJ for specific requirement will be required by the Design and Build contractor. 2.3 SITE UTILITY WATER STORAGE AND SUPPLY, UNDERGROUND SITE WATER DISTRIBUTION AND CONNECTIONS WATER STORAGE AND SUPPLY The supply of water to the detention facility is being drawn from a well to tank and served to the detention facility. Since connection to the available street water main is not possible at this time, the water supply to the detention facility and the new proposed improvement will be drawn from the same current source. The current available supply is at 500,000 gallons for both elevated tank and the lower reservoir to supply both the fire and domestic water requirements of the entire site. Based on the initial estimate for the total water demand requirement both for fire and domestic water usage mentioned on Sections 2.1 and 2.2, the total estimated water demand for the facility is about 1,000,000 gallons, which is way higher than the existing by 500,000 gallons. An additional on-ground reservoir will be needed to provide the required of 500,000 gallons (additional) capacity. A location for this additional reservoir has to be identified at the site so that proper direction and design input can be provided. The new reservoir will draw the water supply from the existing Well# 3 and Well#4, and then supply accordingly to needs of the facility. Existing Well#3 actual capacity is at 669 gpm and operates at 54% efficiency per the study. Existing Well#3 will need to be rehabilitated with new pump so that it will work to manufacturer s recommended efficiency. On Well#4, the report shows no actual capacity was taken but on record, the well has 1,000 gpm capacity. All the recommendation mentioned on the evaluation report of the two existing well conducted by Psomas must be undertaken to improve the efficiency of the wells but this action is not limited to the Psomas recommendation. The Design and Build contractor will have to subsequently design and generate required water supply to the facility that will address the fire water, domestic water and irrigation needs. Thus, all required plumbing, mechanical and electrical components must be addressed accordingly. Based on NFPA 22, section , the tank should be able to be filled up in 8 hours. Under current condition, Well#3 alone will not be able to supply the tanks for fire water use within 8 hours. Both Well #3 and #4 should simultaneously be operating to be able to supply the required water demand within the 3951 Medford Street, CA Michelson Dr. # 242,, CA 92612

11 time frame. In order to adequately supply the building, the water distribution should provide adequate flow and pressure to meet the building demand for both fire and domestic water. Proposed Water Storage/Reservoir usage designation: Upper Reservoir (Existing 100,000 gallons Elevated Water Tank): - Designated for domestic and irrigation use. Lower Reservoir (Existing 400,000 gallons concrete reservoir) - Designated as combined use for fire, domestic and irrigation. - When the remaining stored water is at 298,400 gallons this water will be reserved for fire water usage. MEP design and build contractor to design, identify the level line of water, control and stop the water distribution when at the limit level. Proposed New Reservoir (approx. 500,000 gallons capacity) - Designated as for fire use only. - Design and build to design, calculate water requirements based on code requirement, AHJ requirement, and meet all other design criteria that were or were not mentioned on architect, civil, MEP (Mechanical, Electrical, Plumbing), Landscape narrative, basis of design and other documents. Design and build contractor is responsible to provide the required water supply and storage for the project. - Design and build to coordinate, design and confirm with AHJ (fire department and/or building and safety for fire sprinkler), all other agencies associated to water reservoir, water supply and water distribution system. Booster Pump and Fire Pump Station: Recommendation from Psomas is to upgrade all the booster pumps to provide adequate flow and pressure to meet fire flow condition and water demand. Design and Build contractor is responsible to address this requirement that will meet the site s demand. Existing booster pumps needs to be upgraded or replaced and provide new pumps as required for the new reservoir UNDERGROUND SITE WATER DISTRIBUTION AND CONNECTION FIRE WATER LINE Based on the estimated demand for fire, the new 500,000 reservoir will be designated to be used for fire use only. The existing 400,000 lower reservoir will service both for fire water, domestic and irrigation supply. Design and build contractor should design all existing and new reservoir to supply the needed flow and pressure at point of connections to building and fire hydrants within the project boundary. All necessary pumps, valves, backflow devices, mechanical systems, plumbing and electrical requirement must satisfy the intended supply and should comply with applicable code, regulation and standard requirement. A new looped fire water distribution line will be installed from the source (reservoirs) and distributed to the buildings and site fire hydrants within the AB 900 project boundary. Existing connection of the fire hydrant will be disconnected and reconnected to the new fire water line 3951 Medford Street, CA Michelson Dr. # 242,, CA 92612

12 that will be installed under this project. The new fire water line will supply the demand of fire sprinkler system for the new buildings including existing Administration building and site fire hydrants. Based on plumbing fire requirement for building, the pressure at the point of connection to the building should be at a minimum 65 psi and be able to supply the needed flow for each building. Site fire hydrant should be able to operate at a minimum 1,500 gpm at 20 psi. or 2,500 gpm at 20 psi for combined 2 hydrants flow as may be required by the Fire Department (Fire department should be consulted for the flow and pressure). Connections to building fire water line will require FDC (Fire Department Connection) and PIV (Post Indicating Valve) for each building, design and build contractor to coordinate with LA County Fire Department for all the required information and design parameters concerning PDC and PIV for the building. Connection to new Fire Hydrant has to be installed based on Fire Department requirement, initial discussion would require Fire Hydrant to install at 400 feet maximum spacing from each other. DOMESTIC WATER LINE Domestic water requirement were discussed under 2.2 section and this section will cover only on the distribution and connection of the domestic and irrigation water line. For irrigation, civil will cover only the basic connection to water use. The landscape architect will have to provide more detailed information. The proposed project new underground domestic water line will be installed and connected from the reservoir supply side (discharge) on both existing elevated reservoir and the proposed new reservoir manifolded with a separate backflow devices intended for domestic and irrigation. On new reservoir, a separate line that manifolds to fire water line will have its own backflow device. Design and build contractor should design/provide all necessary pumps, valves, backflow devices, mechanical systems, plumbing and electrical requirement that will satisfy the intended supply. All connection from the water reservoir will be reconnected to the existing water line system and new line will be provided that will supply to the proposed building plumbing point of connection under this project. Flow and pressure requirement for building will be identified by MEP during the process but as for initial design and build contractor may use the fire flow and pressure as reference Medford Street, CA Michelson Dr. # 242,, CA 92612

13 3.0 CONCLUSION AND RECOMMENDATION 3.1 PREFERRED ALTERNATIVE CONNECTION Currently the LACDPW s direction is to connect the water supply to the existing offsite 12 diameter waterline, located 14 feet north of the centerline along the West Avenue I. The design build contractors are to coordinate with the water purveyor, County Waterworks District 40 to identify the potential connection location. LA County personnel that we contacted advised that if the connection will be allowed, a new connection can only tapped along West Avenue I as the water pressure at this line is at approximately 85 psi. In order to get the actual water pressure and flow of the existing street water main line, it is recommended that a request from water purveyor be submitted for a fire flow test. 3.2 ALTERNATIVE OPTION - WATER STORAGE Since the existing site is a combined system (Fire, Domestic and Irrigation) LACDPW would like to maintain this system having the water supplied from the existing 12 line, owned by Waterworks District 40. An alternate recommendation is to provide separate lines for Fire water line that will serve on-site fire hydrant, fire sprinkler to existing building that has fire sprinkler (Administration Building) and to new proposed building improvement. The fire water line will have to be tapped from existing 400,000 gallon capacity lower reservoir and from a new 500,000 gallon water reservoir where location has to be determined by architect and the owner. Domestic and irrigation will draw its supply on existing 100,000 gallon elevated tank and from the existing 400,000 gallon water reservoir. Existing reservoir, existing booster pump and appurtenances of this existing water facility has to be upgraded and replace those fixtures, booster pumps, etc. to operate and provide needed water supply, flow and pressure. New water reservoir needs to be designed in compliance to applicable codes, regulation and standards, and approved by AHJ. Water storage/supply design should be able to provide needed demand of the facility. New booster pumps will have to be provided to the new 500,000 gallon water reservoir to deliver the desired flow and pressure to the building. Design and build contractor will have to upgrade existing well#3 and #4 and its existing pumps to achieve the desired capacity that will able to deliver water to all water reservoir within the time frame needed per code and use for fire protection. Design of water storage/reservoir and all its component shall address tank freeze protection requirement per state and county regulation and other applicable codes and standards to be approved by AHJ. Table below shows the initial estimate for the needed water supply for the facility but the estimate the information provided is for reference only and should be use as a guide in determining fire flow requirement, fire sprinkler requirement, domestic water requirement and irrigation requirement of the facility. Detailed estimate and design by the design and build contractor should be done in accordance to all applicable code, regulation, standard, other jurisdictional requirement, plan approval from AHJ Medford Street, CA Michelson Dr. # 242,, CA 92612

14 Table 1: Water Storage Item Usage Water Storage Description Capacity (Gallons) Estimated Demand (Gallons) Designation Remarks 1 Domestic Existing Elevated Water Tank 100, ,000 Domestic Water Usage Existing Reservoir 2 Combined Fire and Domestic Existing On Ground Water Reservoir 400, ,600 Fire Water Usage 104,848 Domestic Water Usage Existing Reservoir 3 Fire New On Ground Ground Water Reservoir 500, ,000 Fire Water Usage New Reservoir Note: Fire and Domestic water line estimate may change depending on AHJ requirement and Plumbing determination of the fire and domestic water demand. Irrigation estimate where not provided but allowance for domestic water use were provided to accommodate irrigation usage. Overall, exact estimate will have to be determined by Design and Build contractor UNDERGROUND WATER DISTRIBUTION SYSTEM. Domestic Water Line 1.) Existing underground combined water line will be utilized that serves building and other usage outside the project boundary. New domestic water line service improvement within the AB 900 project boundary will be design. Improvement on connection, water flow, pressure and distribution of water from the water reservoir. 2.) New domestic water line with backflow device will be installed to service all the building within AB project boundary. Connection to existing domestic water line and water storage reservoir must be planned and designed. 3.) New irrigation water line will be installed to service irrigation requirement on a separate connection with backflow device. Fire Water Line 1.) New looped fire water line will be installed dedicated only for fire water usage serving both for building fire sprinkler and site fire hydrants within the project boundary. 2.) All existing fire hydrant within the project boundary will be disconnected and removed. New fire hydrant will have to be provided along with fire lane access and placed at 400 feet spacing per Fire Department approval Medford Street, CA Michelson Dr. # 242,, CA 92612

15 3.) Each building with fire sprinkler connection shall be provided with FDC and PIV per Fire Department direction. 4.) New fire water line with backflow device will be installed to service all the building fire sprinkler within AB project boundary and the existing Administration Building. 5.) Freeze protection for all/any exposed pipes and other appurtenances should addressed by design and build contractor. 6.) Guidelines, applicable codes and regulation shall be complied by design and build contractor through the process of plan checking. Maintaining the need of fire water supply to the facility is vital to the safety of the facility personnel and users. It is important that the needed fire water supply is met. A careful analysis of the existing well, water storage, lines, new water demand and the assessment of the life, durability and maintenance of existing pipe material (asbestos cement pipe installed 1954), etc., should be done by a Water System Specialist. 3.3 ANNUAL WATER CONSUMPTION From the above sections 2.1 and 2.2, the below annual water consumption can be calculated. Total Fire Water Supply Demand = 417,600 gallons (Fire Sprinkler) + 378,000 gallons (Fire Fighting) = 795,600 Gallons x 2 (Factor of Safety) = 1,591,200 Gallons Domestic Water Demand = 1,829 users x 112 gallons/users/day = 204,848 gallons/day x 365 days = 74,769,520 Gallons Combined Water Supply Demand = 1,591,200 Gallons + 74,769,520 Gallons = 76,360,720 Gallons Approximate Annual Water Consumption = 76,360,720 Gallons / 325,851 (Conversion Factor) = 234 Acre-Ft Based on the calculation above for the proposed Mira Loma Women s Detention Facility, the approximate annual water consumption is 234 Acre - Feet Medford Street, CA Michelson Dr. # 242,, CA 92612

16 4.0 APPENDIX 4.1 EXHIBIT A-1 Concrete Reservoir Elevated tank Well No. 3 Well No Medford Street, CA Michelson Dr. # 242,, CA 92612

17 QUALITY V CA 4.2 CIVIL MBE ENGINEERS, INC. STRUCTURAL DBE SBE EXHIBIT A Medford Street, CA Tel: Fax: e mail: vca@vcaeng.com 2151 Michelson Dr. # 242,, CA Tel: Fax:

18 4.3 EXHIBIT A Medford Street, CA Michelson Dr. # 242,, CA 92612

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20 4.3 EXHIBIT A Medford Street, CA Michelson Dr. # 242,, CA 92612

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