- 33 Years. - HQ in Richmond VA. - New England Merrimack NH Compost Silt fence. - Product Distributors, Manufacturers and Innovators
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1 Rick Fotino New England Contractor Focused Lee Jones New England BMP Specialist Dewatering Bags Silt fence Scott Gorneau, P.E. National Product Manager Rob Woodman, P.E. C.P.E.S.C Senior Stormwater Engineer Mud Mats - 33 Years - HQ in Richmond VA - New England Merrimack NH Compost Silt fence Socks - Yards/Offices from Maine to Florida - Product Distributors, Manufacturers and Innovators Mud Mats Dewatering Bags
2 THE ACF PROCESS / PROJECT TIMELINE DESIGN SUPPORT COMPUTATIONS SIZING DESIGN SKETCHBOOKS MATERIAL DELIVERY PRECON CHECKLISTS OVERSIGHT CERTIFICATIONS DESIGN INSTALLATION COMPREHENSIVE INVOLVEMENT FROM DESIGN CONCEPTION TO POST INSTALLATION PERMITTING BIDDING DETAILS LAYOUTS BUDGET COSTS MEETINGS QUOTES QUALITY SUBMITTALS VALUE ENGINEERING UNIQUE APPROACH BUT CRITICAL FOR IMPROVING SYSTEM DESIGN AND SPEC AND OVERCOMING CHALLENGES IN THE FIELD SPACE EFFICIENT SUBSURFACE STORAGE MECHANICAL TREATMENT AND SCREENING VEGETATED/ BIOLOGICAL TREATMENT SYSTEMS RUNOFF REDUCTION TECHNIQUES Overview of Challenges with traditional vegetated BMPs Introduction to High Flow Biofiltration Case Studies
3 Rain Gardens Bioretention Bioswales Organic Filters Maine DEP BMPs Underdrain Soil Filter Bioretention Cell Used widely across the nation In almost every stormwater manual Considered a solid WQ treatment device Used as a benchmark for SW impact fees (e.g. Delaware) The most common GI/LID BMP If Designed and constructed well can be a solid BMP. BUT Most of us have experienced some troubles with these BMPs in design, in construction and or post construction. WHAT ARE COMMON CHALLENGES WITH VEGETATED BMPS? (BIORETENTION, RAIN GARDENS, USF)
4 CHALLENGES WITH VEGETATED BMPS Space consumption Issues with trash and debris accumulation (aesthetics/maintenance) Tree health (either proximity of bmps to existing trees or new trees planted) / plantings Clogging of filtering medias and fabrics (QA/QC of media and entire bio profile) Energy dissipation/erosive forces from pavement Need for more reliable stormwater quality treatment Maintenance cost, ease and frequency Overcoming unexpected utility conflicts in the field Poor coordination in field LACK OF SPACE Take up too much space Eat up developable land Not suitable for retrofits Note enough space either abandon location or concede on treatment volume Large Earthwork and Export late in the project TRASH AND DEBRIS/ENERGY DISSIPATION/PRETREATMENT
5 TREE HEALTH Trees need deep rich planting soil Bioretention media is not always the best for tree health and longevity We either plant trees that don t do as well or we leave trees out of the design which can hurt site aesthetics. PLANTINGS Civil Engineers plan versus Landscape Architect CE plan can be to simple and boring LA plan can sometimes be too complex with too many species looks great but adds complexity to maintenance. CLOGGING OF SYSTEM Poor QC Mixed in Field Unreliable WQ Generic fabric.. Perf pipe limited openings Poor spec Too many fines softwood Washed
6 WATER QUALITY TREATMENT UNKNOWN ACTUAL PERFORMANCE Bio-Media: Independent 3 rd party research has reported an increase in Phosphorus discharges from Traditional Biomedia cells. UNEXPECTED UTILITY CONFLICTS POOR FIELD COORDINATION LACK OF OVERSIGHT
7 WE HAVE TWO OPTIONS: 1. IMPROVE QUALITY OF SPECS AND COORDINATION IN THE FIELD --- BUT WE STILL HAVE SPACE CONSTRAINTS AND RELIABLE PERFORMANCE TO WORRY ABOUT 2. LOOK FOR INNOVATIVE SOLUTIONS HIGH PERFORMANCE MODULAR BIOFILTRATION SYSTEMS Goal is to improve the project for: Designer Contractor Owner/Management Many Great Options available to designers: Filterra Contech StormTree FocalPoint Biofilter Allows you to go green when space is limited.
8 ACF FOCALPOINT GREEN INFRASTRUCTURE VEGETATED/ BIOLOGICAL TREATMENT SYSTEMS APPROVED IN NH, ME, VA, MD, CT, NY, PHILLY, MA DEP COMPLIANT LID/GI DEVELOPMENT SOLUTIONS Enhanced PCSM (LID) & (GI)
9 Larry Coffman developed the basic 1st generation concepts of bioretention during his time at the Prince George s (PG) County Department of Environmental resources. Larry Coffman The original bioretention area was designed to acquire a LEED Silver Certification, and included a standard media bioswales that fed an underground water harvesting system.
10 Completed FocalPoint BioFiltration footprint: The FocalPoint was able to meet the needs at 70SF what the traditional bioswale unsuccessfully attempted to do in 1200 SF. With a simple retrofit of the two swales, placing the FocalPoint at the lowest elevation in each, the drainage problem was solved with a simple, quick, cost effective retrofit. Ponding area will provide attenuation for large peak volume during storm event. FocalPoint footprint provides high efficiency treatment for storm events
11 HIGH FLOW BIOFILTRATION SYSTEM PROFILE Vegetated System: Plants process pollutants removed from run-off and root system maintains drainage and aeration of media. 3 Layer of Shredded Hardwood Mulch: Pre-treatment mechanism. Removal and Replacement of Mulch Represents the Bulk of System Maintenance! 18 High Performance Media: Flows at 100 Per Hour / 200 ft per day Resistant to Clogging Pollutant Removal: TSS = 91% Nitrogen = 48% Phosphorus = 66% 6 Bridging Stone & Separation Layer: Clog-Proof Clean Stone & Micro-Mesh Replace Traditional Geotextile Layer No geotextile = no clogging Bridging Prevents Clogging Vegetated System: Plants process pollutants removed from run-off and root system maintains drainage and aeration of media. 3 Layer of Shredded Hardwood Mulch: Pre-treatment mechanism. Removal and Replacement of Mulch Represents the Bulk of System Maintenance! 6 Bridging Stone & Separation Layer: Clog-Proof Clean Stone & Micro-Mesh Replace Traditional Geotextile Layer No geotextile = no clogging HIGH FLOW BIOFILTRATION SYSTEM PROFILE 18 High Performance Media: Flows at 100 Per Hour / 200 ft per day Resistant to Clogging Pollutant Removal: TSS = 91% Nitrogen = 48% Phosphorus = 66% High Performance Underdrain: 9.45 Modular Tank, or Flat Pipe w/95% Open Surface Collects Water Efficiently. Optional 2 Low-Profile Panel Addresses Shallow Applications. Expand into Modular Tanks for Larger Storage Needs.
12 Maximize Development Opportunity
13 Maximize Development Opportunity Quality Assurance / Quality Control (QA/QC): Media, Stone and Mulch are all Bagged to Prevent Field Contamination material is generally placed from suspended bag Bridging Stone: (Washed) Mulch: (Shredded& Screened) Rain Guardian MEDIA: (Pre-mixed & Certified) The System is sold as a bundle to provide quality control for all components.
14 Installation Installation Installation
15 CONSTRUCTION OVERSIGHT IS IMPERATIVE = Water Quality Volume = FocalPoint Treatment = Volume > WQv to bypass Inflow From Drainage Area Discharge From FocalPoint During run-up to peak = Flow thru device. Peak volume is stored in the surface depression. After peak = Flow thru device. Excess runoff goes to bypass
16 Scalability High Flow system scalable - gives designers maximum flexibility to leverage the available surface footprint in meeting both the water quality and water volume requirements. Pre-to-post design examples pictured below are all based on a common runoff volume of 2,227 cubic ft from the a 0.20 acre impervious cover (CN 98) Drainage Area. = Media Footprint = Surface Depression / Temporary Storage 36 Option #1: Total Footprint 324 sf sq ft 17.0 Option #1: Large percentage of small available footprint is FocalPoint with limited temporary storage available nts 18 9 Option #2: Total Footprint 972 sf 90 sq ft Option #3: Total Footprint 1,620 sf sq ft nts Option #2: Medium percentage of medium available footprint is FocalPoint with more temporary storage available. Option #3: Small percentage of large available footprint is FocalPoint with most temporary storage available. nts High-Flow Treatment System Temporary Surface Storage = High Flow Footprint = Ponding Storage Curb & Gutter Box Top
17 Bioretention Section Comparison Bio-Media: Independent 3 rd party research has reported an increase in Phosphorus discharges from Traditional Biomedia cells. = Media Treatment Footprint FocalPoint: 3 rd party lab and field tests confirm Phosphorus reduction BEFORE AFTER
18
19 RELEVANT RECENT PROJECTS LOW IMPACT DEVELOPMENT SOLUTIONS
20 KITTERY TRADING POST FOCALPOINT BIOFILTRATION SYSTEM LOW IMPACT DEVELOPMENT SOLUTIONS 0.68 ACRE TRIB AREA, 0.5 INCH TREATMENT GOAL SF FOCALPOINT HIGH PROFILE RETAIL FOCALPOINT BIOFILTRATION SYSTEM LOW IMPACT DEVELOPMENT SOLUTIONS 0.68 ACRE TRIB AREA, 0.5 INCH TREATMENT GOAL SF FOCALPOINT INFILL HOUSING DEVELOPMENT FOCALPOINT, R-TANK, FABCO SPACE EFFICIENT SUBSURFACE STORAGE VEGETATED/ BIOLOGICAL TREATMENT SYSTEMS RUNOFF REDUCTION TECHNIQUES MECHANICAL TREATMENT AND SCREENING
21 INFILL HOUSING DEVELOPMENT FOCALPOINT, R-TANK, FABCO SPACE EFFICIENT SUBSURFACE STORAGE VEGETATED/ BIOLOGICAL TREATMENT SYSTEMS RUNOFF REDUCTION TECHNIQUES MECHANICAL TREATMENT AND SCREENING INFILL HOUSING DEVELOPMENT FOCALPOINT, R-TANK, FABCO SPACE EFFICIENT SUBSURFACE STORAGE VEGETATED/ BIOLOGICAL TREATMENT SYSTEMS RUNOFF REDUCTION TECHNIQUES MECHANICAL TREATMENT AND SCREENING 319 GRANT FUNDED RETROFIT
22 ACCESSORY ITEMS
23 VEGETATED BMP IN URBAN ROW Key Design Elements * Energy Dissipation * Collection of sediment/debris PRETREATMENT FOR BIORETENTION
24 Maximize Capacity & Extend Effective Bioretention Cell Life Rain Guardian: Provides stable inlet & pretreatment, drains and dries between storm events. Overflow points allows bioretention cell to reach capacity prior to bypass. Grate Filter Base & Riser Grate/Filter/Chamber combination captures sediment and debris. Easy Installation: Typical Turret Installation Sequence
25 WHAT IF THERE IS A SIDEWALK?? Rain Guardian Turret INTRODUCING RAIN GUARDIAN CASEMATE/FOXHOLE Rain Guardian Casemate/Foxhole INTRODUCING RAIN GUARDIAN CASEMATE/FOXHOLE Rain Guardian Casemate/Foxhole
26 Pretreatment for Bioretention Example Applications Smart Space Efficient Treatment Train
27 HIGH FLOW MEDIA SYSTEM CAN HELP WITH Space consumption typically 5 10% of the size Issues with trash and debris accumulation smaller size options for pretreatment Tree health consider smaller shrubs in media and trees in surrounding soils Clogging of filtering medias and fabrics Premixed media and complete section not just one component Need for more reliable stormwater quality treatment 3 rd party testing completed Maintenance cost, ease and frequency smaller footprint Overcoming unexpected utility conflicts in the field smaller footprint/modular/field adjustable Poor coordination in field needs to be addressed but do have manufacturer s rep on site
FocalPoint****************
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