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HomeMy WebLinkAboutCT 06-15; TABATA RANCH; STORM WATER MANAGEMENT PLAN; 2013-07-01Cm' of Carlsbac] California STORM WATER MANAGEMENT PLAN For Tabata Ranch CT 06-15 SWMP 11-06 GR 11-10 DWG 471-9A , 6 1 3 2014 V/ Prepared By: REC Consultants Inc Bruce Robertson 2442 Second Avenue San Diego,, CA 92101 Telephone: (619) 232-9200 Prepared For: Noburu & Evelyn Tabata PO Box 679 Carlsbad, CA 92018 Telephone: (760) 438-0280 April, 2011 Revised July, 2013 CO cr Tabata Ranch SWMP CERTIFICATION This Storm Water management Plan (SWMP) has been prepared under the direction of the following Registered Qvil Engineer. The Registered Gvil Engineer (Engineer) attests to the technical information contained herein and the engineering data upon which the following design, recommendations, conclusions and decisions are based. The selection, sizing, and preliminary design of stormwater treatment and other control measures in this report meet the requirements of Regional Water Quality Control Board Order R9-2007-0001 and subsequent amendments. ace Robertson "REGISTERED QVIL ENGINEER 'ate STAMP May, 2011 Page 1 Tabata Ranch SWMP TABLE OF CONTENTS CERTIFICATION 1.0 INTRODUCTION 4 2.0 APPLICABILITY AND PROJECT TYPE 5 2.1 HMP PROJECT DETERMINATION 6 3.0 PROJECT OVERVIEW 6 3.1 Project Location 6 3.2 Project Description 6 3.3 Project Size 7 3.4 Impervious and Pervious Surface areas 7 3.5 Opportunities and Constrains for storm water control and treatment. 7 PROJECT SITE ASSESSMENT 7 3.6 Land Use and Zoning 7 3.7 Existing Topography 7 3.8 Existing and Proposed Drainage 7 3.9 Watershed and Receivir^ "Waters 8 3.10 303(d) Listed Receiving Waters 8 3.11 Total Maximum Daily Loads (TMDLs) 8 3.12 Soil Type(s) and Conditions 8 4.0 POLLUTANTS OF CONCERN 9 4.1 Project Categories and Features 9 4.2 PoUutants of Concem 9 4.3 Project Water Quality Analyses 11 4.4 Project Watershed Information 11 5.0 HYDROLOGIC CONDITIONS OF CONCERN/ DRAINAGE REPORT 13 6.0 BEST MANAGEMENT PRACTICES (BMPs) 14 6.1 LID Site Design Strategies and BMPs 14 6.1.1 Optimize the Site Layout 14 6.1.2 Use Pervious Surfaces 14 6.1.3 Disperse Runoff 14 6.1.4 Integrated Management Practices (IMPs) 14 6.2 Documentation of Drainage Management Areas (DMAs) 15 6.2.1 Defining Drainage Management Areas 15 6.3 Treatment Control BMPs/IMP Calculations 15 6.3.1 Selection 15 6.3.2 Design and Sizing 16 6.4 Altematives to Integrated LID Design 16 6.5 Source Control BMPs 16 May, 2011 Page 2 Tabata Ranch SWMP 7.0 HYDROMODIFICATION 26 8.0 PROJECT PLAN(s) & BMP LOCATION MAP 28 9.0 BMP MAINTENANCE 29 9.1 Facility Ownership & Maintenance Agreements 29 9.2 Transfer to public ownership 29 9.3 Operations, Maintenance and Inspection 29 9.3.1 Typical Maintenance Requirements 30 9.3.2 Bio-retention facilities (including self-retaining areas) 30 9.3.3 Filtration Devices such as Manufactured Flow Through Planters (Bio-filterra) 31 9.3.4 Project BMP Verification 31 9.3.5 Annual BMP Operation and Maintenance Verification 31 May, 2011 Page 3 Tabata Ranch SWMP 1.0 INTRODUCTION This Storm Water Management Plan (SWMP) is required by the Qty of Carlsbad for all pnonty development projects, as defined by CMC 15.12, shall comply with the provisions of the Gty of Carlsbad Local SUSMP, as adopted bythe Gty Council by resolution, and incorporated by reference into this division. The purpose of this SWMP is to address the water quality impacts from the proposed Tabata Ranch subdivision project. The site design, source control and treatment control Best Management Practices (BMPs) will be utilized to provide long term solution to protecting water quality. This SWMP is subject to revisions as needed to accommodate changes to the project design, or as required bythe Gty and/ or Engineer. May, 2011 Page 4 Tabata Ranch SWMP 2.0 APPLICABILITY AND PROJECT TYPE PRIORITY DEVELOPMENT PROJECT DETERMINATION TABLE 1: IS THE PROJECT IN ANY OF THESE CATEGORIES? Yes X No • 1 Housing subdivisions of 10 or more dwelling units. Ejoniples: single-family homes, miJti-family homes, condominiums, and apartments; v , Yes • No X 2 Commercial—greater than one acre. Any development other than heavy industry or residential. Examples: hospitals; laboratories and other medical facilities; educational institutions; recreational facilities; municipal facilities; commercial nurseries; muhi-apartment buildings; car -wash facilities; mini-malls and other business complexes; shopping malls; hotels; office buildings; public •warehouses; automotive dealerships; airfields; and other light industrial facilities. Yes • No X 3 Heavy Industry—greater than one acre. Examples: manufacturing plants, food processing plants, metal working facilities, printing plants, and fleet storage areas (bus, truck, etc.) Yes • No X 4 Automotive repair shops. A facility categorized in anyone of Standard Industrial Oassification (SIQ codes 5013, 5014, 5541,7532-7534, or 7536-7539. Yes a No X 5 Restaurants. Any facility that sells prepared foods and drinks for consumption, including stationary lunch counters and refreshment stands selling prepared foods and drinks for immediate consumption (SIC code 5812), -where the land area for development is greater than 5,000 square feet. Restaurants -where land development is less than 5,000 square feet shall meet all SUSMP requirements except for structural treatment BMP and numeric sizing criteria requirements and hydromodification requirements. Yes • No X 6 Hillside development greater than 5,000 square feet. Any development that creates 5,000 square feet of impervious surface and is located in an area -with known erosive soil conditions, -where the development -will grade on any natural slope that is twenty-five percent or greater. Yes • No X 7 Environmentally Sensitive Area (ESA)''. All development located within or directly adjacent^ to or dischai^ing direcdy' to an ESA (-where discharges from the development or redevelopment -wiU enter receiving -waters -within the ESA), -which either creates 2,500 square feet of impervious surface on a proposed projea site or increases the area of imperviousness of a proposed projen site to 10% or more of its naturally occurring condition Yes • No X 8 Parking lots 5,000 square feet or more or-with 15 or more parking spaces and potentially exposed to urban runoff. Yes • No X 9 Street, roads, highvtfays, and freeways. Any paved surface that is 5,000 square feet or greater used for the transportation of automobiles, trucks, motorcycles, and other vehicles. Yes • No X 10 Retail Gasoline Outlets (RGOs) that are: (a) 5,000 square feet or more or (b) a projeaed Average Daily Traffic (ADT) of 100 or more vehicles per day. Yes • No X 11 Coastal Development Zone. Any project located -within 200 feet of the Pacific Ocean and (1) creates more than 2500 square feet of impervious surface or (2) increases impervious surface on property by more than 10%. Yes X No-- • 10 More than Ir-acre of disturbance. Project results in tlic distiubaoce of 1-acre or mure of knd and is considered a Pollutant-generating Development Project . May, 2011 Page 5 Tabata Ranch SWMP 1 Environmentally Sensitive Areas include but are not limited to all Qean Water Aa Section 303(d) impau-ed water bodies; areas designated as Areas of Special Biological Significance bythe State Water Resources Control Board (Water Quality Control Plan for the San Diego Basin (1994) and amendments); water bodies designated with the RARE beneficial use bythe State Water Resources Control Board (Water Quality Control Plan for the San Diego Basin (1994) and amendments); areas designated as preserves or dieir equivalent under the Muki Species Conservation Program within the Gties and County of San Diego; and any other equivalent environmentally sensitive areas wliich have been identified by the Coperminees. 2 "Direcdy adjacent" means situated -within 200 feet of the Environmentally Sensitive Area. 3 "Discharging directly to" means outflow from a drainage conveyance system diat is composed entirely of flows from the subjen development or redevelopment site, and not commingled-with flow from adjacent lands. 4 Pollutant-generating Development Projeas are those projects that generate pollutants at levels greater than bacl^round levels. In general, these include all projects that contribute to an exceedance to an impaired water body or which create new impervious surfaces greater than 5000 square feet and/or introduce new landscaping areas that require routine use of fertilizers and pesticides. In most cases linear pathway projeas that are for infrequent vehicle use, such as emergency or maintenance access, or for pedestrian or bicycle use, are not considered Pollutant-generating Development Projects if they are buik with pemous surfaces or if they sheet flow to surrounding pervious surfaces. Since the proposed project has been identified as a Priority Project, this SWMP includes design and supporting calculations for site design Low Impact Development (UD) BMPs, Source Control BMPs, and Treatment Control BMPs. 2.1 HMP PROJECT DETERMINATION Priority Development Projects must be designed so that runoff rates and durations are controlled to maintain or reduce pre-project downstream erosion conditions and protect stream habitat. The proposed project is not exempt from HMP criteria and will implement measures to manage Hydro-modification. See attachments C and D. 3.0 PROJECT OVERVIEW 3.1 Project Location The project site is located east of Lonicera Street, south of Veronica Court, and west of Lemon Leaf Drive. The existing site consists of three parcels which are currently occupied by an existing residence and driveway. The site consists mostly of a gentie slope from east to west. Portions of the site consist of manufactured steeper slopes including areas along the northem subdivision boundary and the southeastern subdivision boundary. Attachment A illustrates the project location and a detailed site map. 3.2 Project Description The intent of the proposed project is to develop the proposed project site into 5 detached single- family dwellings, although no architecture is proposed by this project. The proposed development will include a proposed public street on-site originating from Lonicera Street, storrn drain improvements, and a treatment swale. The project proposes grading to create multi-level pads suitable for the constmction of residential stmctures and the constmction of aU underground utilities typically associated with residential development. The improvements proposed along Lonicera Street consist of the cuib and gutter along the fronuge, an extension of sewer, and a portion of stormdrain tying into existing storm drain. The improvements at the end of Lemon Leaf Drive consist of two driveway approaches serving lot I and lot 2. There are no proposed improvements at the end of Veronica Court. May, 2011 Page 6 Tabata Ranch SWMP 3.3 Project Size The project size is 3.35 ac with a total distvirbed acreage of approximately 2.45 acres. The project will be developed in a single phase. 3.4 Impervious and Pervious Surface areas The existing 3.35 acre site is about 6.0% pervious, after development the site will create approximately 1.5 acres of impervious surfaces. The site would then become approximately 45% pervious after development. 3.5 Opportunities and Constrains for storm water control and treatment The site offers several opportunities for water control and treatment by means of self-treating areas, self-retaining areas, bio-retention and controlled underground detention. Refer to BMP map for locations PROJECT SITE ASSESSMENT This section includes information used to consider the potential water quality and hydrologic impacts from the proposed project. This information is important when consideriiig the appropriate BMPs to reduce identified potential impacts as well as when desigriing low impact development (LID), source control and treatment control measures to reduce those impacts. 3.6 Land Use and Zoning The property is zoned for residential development. Residential developments generate different types of pollutants during constmction and after constmction. This type of project will have to address water quality control and water flow control by incorporating LID, site design, and sotirce control BMP's into the project. 3.7 Existii^ Topography The topography is characterized by moderate to steep sloping natural terrain. The development area is on slopes less than 25% with the highest point being 305 feet above mean sea level (AMSL) located at the nordieast property limits and the lowest point being approximately 250 feet (AMSL) at existing access driveway. 3.8 Existing and Proposed Drainage Some drainage from the existing site sheet flows in a westerly direction across the project site to Lonicera Street. This northem subarea confluences with Watershed 400 of the "Drainage Study of Mariner's Point" (CI 98-14). The runoff is then conveyed in a storm drain pipe nortii on Lonicera Street, west on Camino de las Ondas, southeast on Alderwood Drive, south on Batiquitos Drive, and ultimately discharges southeast of the intersection of Poinsettia Lane and Batiquitos Dnve. The southem subarea is conveyed in brow ditches from north to south, ultimately to a curb inlet on Poinsettia Lane. Runoff from the southem subarea then is conve>^d southwest m a storm dram pipe and ultimately discharges southeast of the intersection of Poinsettia Lane and Batiquitos Drive. Prior to CT 98-14, the existing site sheet flowed to a headwall inlet on the eastem edge of CI 83-02. The runoff was then conveyed in a storm drain pipe west to Briarwood Drive, west along Bnanvood Drive, south on Batiquitos Drive, and ultimately discharged southeast of the intersection of May, 2011 Page 7 Tabata Ranch SWMP Poinsettia Lane and Batiquitos Drive. The constmction of CT 98-14 created a slight diversion of runoff away from the storm drain system located in Batiquitos Drive and impacted the system in Poinsettia Lane. The development of the existing site wiU result in the correction of this diversion and will alleviate the impact on the system in Poinsettia Lane. The proposed storm drain system design includes constmction of catch basins, curb inlets and all related piping. The proposed project design wiU utilize the proposed public street to convey storm water to tiie proposed inlets and proposed LID measures before conveying flow to the existing underground public system offsite approximately 125' north of the intersection of the new public street and Lonicera Street. 3.9 "Watershed and Receiving Waters The proposed project is located within the San Marcos Hydrologic Area and within the Batiquitos Hydrologic Sub Area (904.51). The coastal and groundwater receiving waters located in the area and downstream of this project include into a natural creek that ultimately discharges into Batiquitos Lagoon. The des^ated beneficial uses of these coastal waters include RECl, REC2, BIOL, EST, WILD, RARE, MAR, MIGR and SPWN. The designated potential beneficial uses for groundwater include MUN, AGR and IND. (Water Quality Control Plan for the San Diego Basm). 3.10 303(d) Listed Receiving Waters According to the Califomia 2007 CWA 303d list published bythe San Diego Regional Water Quality Control Board, there is no impaired water body associated with this development. 3.11 Total Maximum Daily Loads (TMDLs) The adopted TMDLs in the San Diego area include: Indicator bacteria for beaches and creeks in the San Diego Region. 3.12 Soil Type(s) and Conditions The soil is type D, which is not that erosive under normal conditions. May, 2011 Page 8 Tabata Ranch SWMP 4.0 POLLUTANTS OF CONCERN 4.1 Project Categories and Features PROJECT SPEQHC POLLUTANTS OF CONCERN FROM TABLE BELOW. Pollutant Category Anticipated (X) Potential (P) Surface Water Impairments Sediments (X) Nutrients (X) Heavy Metals (P) Oiganic Compounds (P) Trash & Debris (X) Oxygen Demanding Substances (P) Oil & Grease (X) Baaeria & Viruses (X) Pesticides (X) 4.2 PoUutants of Concem Primaiy Pollutants of Concem 1. Sediments - Sediments are soils or other surficial materials eroded and then transported or deposited bythe action of wind, water, ice, or gravity. Sediments can increase turbidity, clog fish gills, reduce spawning habitat, lower young aquatic organisms survival rates, smother bottom dweUing organisms, and suppress aquatic vegetation growth. 2. Nutrients - Nutrients are inorganic substances, such as nitrogen and phosphorus. They commonly exist in the form of mineral salts that are either dissolved or suspended in water. Primary sources of nutrients in urban runoff are fertilizers and eroded soils. Excessive discharge of nutrients to water bodies and streams can cause excessive aquatic algae and plant growth. Such excessive production, referred to as cultural eutrophication, may lead to excessive decay of organic matter in the water body, loss of oxygen in the water, release of toxins in sediment, and the eventual death of aquatic organisms. May, 2011 Page 9 Tabata Ranch SWMP 3. Metals - Metals are raw material components in non-metal products such as fuels, adhesives, paints, and other coatings. Primary source of metal pollution in storm water are typically commercially available metals and metal products. Metals of concem include cadmium, chromium, copper, lead, mercury, and zmc. Lead and chromium have been used as corrosion inhibitors in primer coatings and cooling tower systems. At low concentrations naturally occurring in soil, metals are not toxic. However, at higher concentrations, certain metals can be toxic to aquatic life. Humans can be impacted from contaminated groundwater resources, and bioaccumulation of metals in fish and shellfish. Environmental concems, regarding the potential for release of metals to the environment, have already led to restricted metal usage in certain applications. Secondaiy Pollutants of Concem 1. Organic Compounds - Organic compounds are carbon-based. CommerciaUy available or naturally occurring organic compounds are found in pesticides, solvents, and hydrocarbons. Organic compounds can, at certam concentrations, indirectly or directly constitute a hazard to life or health. When rinsing off objects, toxic levels of solvents and cleaning compounds can be discharged to storm drains. Dirt, grease, and grime retained in the cleaning fluid or rinse water may also adsorb levels of organic compoimds that are harmful or hazardous to aquatic life. 2. Trash & Debris - Trash (such as paper, plastic, polystyrene packing foam, and altiminvmi materials) and biodegradable organic matter (such as leaves, grass cuttings, and food waste) are general waste products on the landscape. The presence of trash & debris may have a significant impact on the recreational value of a water body and aquatic habitat. Excess organic matter can create a high biochemical oxygen demand in a stream and thereby lower its water quality. Also, in areas where stagnant water exists, the presence of excess organic matter can promote septic conditions resulting in the growth of undesirable organisms and the release of odorous and hazardous compounds such as hydrogen sulfide. 3. Ox)gen-Demanding Substances - This category includes biodegradable organic material as well as chemicals that react with dissolved oxygen in water to form other compounds. Proteins, carbohydrates, and fats are examples of biodegradable organic compounds. Compoimds such as ammonia and hydrogen sulfide are examples of oxygen-demanding compoimds. The oxygen demand of a substance can lead to depletion of dissolved oxygen in a water body and possibly the development of septic conditions. 4. Oil and Grease - Oil and grease are characterized as high-molecular weight organic compounds. Primary sources of oil and grease are petroleum hydrocarbon products, motor products from leaking vehicles, esters, oils, fats, waxes, and high molecular-weight fatty acids. Introduction of these pollutants to the water bodies are very possible due to the wide uses and applications of some of these products in municipal, residential, commercial, industrial, and constmction areas. Elevated oil and grease content can decrease the aesthetic value of the water body, as well as the water quality. May, 2011 Page 10 Tabata Ranch SWMP 5. Bacteria and Viruses are ubiquitous microorganisms that thrive under certain environmental conditions. Their proliferation is typically caused bythe transport of animal or human fecal wastes from the watershed. Water, containing excessive bacteria and viruses can alter the aquatic habitat and create a harmful environment for humans and aquatic life. Also, the decomposition of excess organic waste causes increased growth of undesirable organisms in the water. 6. Pesticides (including herbicides) are chemical compoimds commonly used to control nuisance growth or prevalence of organisms. Excessive application of a pesticide may result in runoff containing toxic levels of its active component. 4.3 Project Water Quality Analyses NA 4.4 Project Watershed Information The Carlsbad f^drologic Unit (904) is approximately 210 square miles in area extending from the headwaters above Lake Wolhford in the east to the Pacific Ocean in the west, and from Vista and Oceanside in the north to Solana Beach, Escondido, and the community of Rancho Santa Fe to the south. The cities of Carlsbad, San Marcos, and Encinitas are entirely within this HU. There are numerous important surface hydrologic features within the Carlsbad HU including four unique coastal lagoons, three major creeks, and two large water storage reservoirs. The HU contains four major, roughly parallel hydrologic areas (HAs). From north to south they are the Buena Vista (901.2), tiie Agua Hedionda (904.3), tiie Batiquitos (904.5), and tiie San Elijo (904.6) HAs. Two smaUer HAs, the Loma Alta (904.1) and the Canyon de las Encinas (904.4) are also within the Carlsbad HU. The Agua Hedionda, Buena Vista, and San Elijo lagoons are experiencing impairments to beneficial uses due to excessive coliform bacteria and sediment loading from upstream sources. These coastal lagoons represent critical regional resources that provide freshwater and estuarine habitats for numerous plant and animal species. Other water bodies in the Carlsbad HU have been identified as impaired on the Califomia 303(d) list for elevated coliform bacteria including several locations in the Pacific Ocean near creek and lagoon outlets. (Source: Project Qean Water) May, 2011 Page 11 Tabata Ranch SWMP Table 5-1 Potential Pollutants for Project Categories General Pollutant Categories Priority Project Categories Sediment Nutrients Hea-vy Metals Organic Compounds Trash & Debris Oxygen Demanding Substances Oil& Grease Baaeria & Viruses Pesticides Detached..; • Residential Development X, X -X X X X X Attached Residential Development X X X P(l) P(2) P X Commercial Development >Dne acre P(l) P(l) X P(2) X P(5) X P(3) P(5) Heavy Industry X X X X X X Automotive Repair Shops X X(4)(5) X X Restaurants X X X X P(l) Hillside Development >5,000 ft2 X X X X X X Parking Lots P(l) P(l) X X P(l) X P(l) Retail Gasoline Oudets X X X X X Streets, Highways & Freeways X P{1) , X X P(5) X X P(l) X = anticipated P = potential (1) A potential pollutant if landscaping exists on-site. (2) A potential pollutant if the project includes uncovered parkir^ areas. (3) A potential pollutant if land use involves food or animal -waste products. (4) Includir^ petroleum hydrocarbons. (5) Including solvents. May, 2011 Page 12 Tabata Ranch SWMP 5.0 HYDROLOGIC CONDITIONS OF CONCERN/ DRAINAGE REPORT A drainage report was prepared for the proposed Tabata 10 Project. The following is a summary of the report findings. • The Tabata Ranch Project will not significantly alter drainage pattems on the site. • The ultimate discharge points wiU not be changed. • Graded areas and slopes will be landscaped to reduce or eliminate sediment discharge. • Constmction and post-constmction BMPs will address mitigation measures to protect water quality and protection of water quality objectives and beneficial uses to the maximum extent practicable. • The project does not propose to place housing within a 100-year flood hazard zone. • The Tabata Ranch project (Priority Development) must manage hydro modification impacts. May, 2011 Page 13 Tabata Ranch SWMP 6.0 BEST MANAGEMENT PRACTICES (BMPs) Minimising the proposed project's effects on water quality, as well as compKance with State and local requirements can be most effectively achieved by using a combination of BMPs which include Low Impact Design (LID) Site Design, Source Control, and for Priority projects shall include Treatment Control measures. These design and control measures employ a multi-level strategy that consists of: 1) reducing or eliminating post-project runoff; 2) controlling sources of pollutants; and 3) treating stormwater runoff before discharging it to the storm drain system or to receiving waters. This SWMP and the proposed BMPs for the proposed project have been developed to minimize drain^e impacts identified in Section 5 and the introduction of pollutants identified m Section 4 into the municipal storm drain system and/or ultimate drainage receiving water body. 6.1 LID Site Design Strategies and BMPs ConceptuaUy, there are four LID strategies for managing runoff from buildings and paving: 1. Optimize the site layout; 2. Use pervious surfaces; 3. Disperse runoff; and 4. Design Integrated Management Practices (IMPs). 6.1.1 Optimize the Site Layout The project designates Lot 8 as open space with almost 100% pervious surface. The project as proposed avoids excessive grading and dismrbance of vegetation and soils and replicates the site's natural drainage patters to the maximum extent practicable. 6.1.2 Use Pervious Surfaces The project proposes the implementation of bioretention areas and self-treating areas throughout the site. 6.1.3 Disperse Runoff The project will disperse runoff from rooftops and impervious surfaces to adjacent landscaping and permeable areas that will perform as self-treating or self-retaining areas to the maximum extent practicable. 6.1.4 Integrated Management Practices (IMPs) There are two distinctive practices that could be implemented for the project for treatment of rooftops, hardscape, driveways (fumre development of residential pads) and street runoff: 1) Bioretention 2) Flow -Through Planter - Filterra device (or similar) May, 2011 Page 14 Tabata Ranch SWMP 6.2 Documentation of Drainage Management Areas (DMAs) The design documentation procedure for the project begins with careful delineation of pervious areas and impervious areas (including roofs) throughout the site. The procedure accounts for how runoff from each delineated area is managed. For areas draining to IMPs, the procedure ensures each IMP is appropriately sized. 6.2.1 Defining Drainage Management Areas Prior to final design of UD and/or treatment control BMPs into the proposed project, Drainage Management Areas will need to be defined, categorized and tabulated for the entire site. 6.3 Treatment Control BMPs/IMP Calculations Sections 2 and 4 of the Qty's Stormwater Standards Manual should be utilized to complete this design section. This section must include all design criteria, calculations, basis for selection (include targeted pollutants, justification, and altemative analysis), poUutant removal infonnation (other than vendor specifications) and any restrictions, location of BMPs and literature references. 6.3.1 Selection A treatment control BMP and/or LID facility must be selected to treat the project pollutants of concem identified as "Project Pollutants of Concem". A treatment control facility with a high or medium pollutant removal efficiency for the project's most significant poUutant of concem shaU be selected. It is recommended to use the design procedure in Chapter 4 of the SUSMP to meet NPDES permit LID requirements, treatment requirements, and flow control requirements. Review Chapter 2 "Selection of Stonnwater Treatment Facilities" in the SUSMP to assist in detemiining the appropriate treatment facility for your project. Table 7-5 provides a general comparison of how various types of treatment facilities perform for each group of poUutants. The poUutants forthe proposed project are identified in Section 5 above. TABLE 7-5 Groups of Pollutants and Relative Effectiveness of Treamient Facilities Pollutants of Concern Bioretention Facilities (LID) Settlir^ Basins pry Ponds) Wet Ponds and Constructed Wetlands Infiltntion Facilities or Practices {UD) Media Pikers Higher- rate biofihers Higher- rate media filters Trash Racks & Hydro -dynamic Devices Vegetated S-wales Coarse Sediment and Trash High High High High High High High High High Pollutants that tend to associate with fine particles during treatment High High High High High Medium Medium Low Medium Pollutants that tend to be dissolved foUowing treatment Medium Low-Medium High Low Low Low-Low Low May, 2011 Page 15 Tabata Ranch SWMP 6.3.2 Design and Sizing The recommended design procedure in Section 4 of the Qty's SUSMP - LID practices with the use of infiltration facilities and practices and bioretention facilities to meet NPDES permit LID requirements, treatment requirements, and flow-control requirements in a cost-effective and unified design was utilized for this design. The foUowing design sheets mcluded in Section 4 of the Qty's SUSMP - LID design guidelines were utilized: • Setf-treating • Flow-through planter • Bio-Retention These design sheets include recommended configurations and details, and example applications, for these IMPs. 6.4 Altematives to Integrated LID Design The project at this stage does not proposed altematives to Integrated UD design such Sand FUters, Extended ("Dry") Detention Basins, "Wet" Detention Ponds and Constmcted Wetlands, and Vegetated Swales. 6.5 Source Control BMPs It is anticipated that the foUowing poUutants wiU be generated at this site: PROJECT SOURCE CONTROL BMPS Potendd same cf PerrmnBTt sourxE control BMPs OperaOonal source control BMPs Onsite Storm Drains Locate inlets Maintain and periodically repaint or replace inlet matldngs. Provide stormwater pollution prevention information to new site owners, lessees, or operators. Landscape Areas Undisturbed areas Maintain landscaping using minimum orno pesticides. Based on these anticipated poUutants and operational activities at the site the foUowing Table 7-8 summarizes the Source Control BMPs to be instaUed and/or implemented onsite: May, 2011 Page 16 Tabata Ranch SWMP Table 7-8 Stormwater PoUutant Sources/Source Control Checklist IF THESE SOURCES WILL BE ON THE PROJECT SITE ... Potential Sources of Runoff Pollutants ... THEN YOUR STORMWATER CONTROL PLAN SHOULD INCLUDE THESE SOURCE CONTROL BMPs Permanent Controls—Show on Source Control Exhibit, Attachment B Permanent Controls—List in SUSMP Table and Narrative Operational BMPs—Include in SUSMP Table and Narrative 13 A. On-site storm drain inlets @ Locations of inlets. @ Mark all inlets with the words "No Dumping! Flows to Bay" or similar. HI Maintain and periodically repaint or replace inlet mariiings. HI Provide stormwater pollution prevention information to new site owners, lessees, or operators. HI See applicable operational BMPs in Fact Sheet S044, "Drainage System Maintenance," in the CASQA Stormwater Quality Handbooks at www.cabmphandbooks .com ^ Include the following in lease agreements: "Tenant shall not allow anyone to discharge anything to storm drains or to store or deposit materials so as to create a potential discharge to storm drains." B. Interior floor drains and elevator shaft sump pumps • State that interior floor drains and elevator shaft sump pumps will be plumbed to sanitaty sewer. Inspect and maintain drains to prevent blockages and overflow. C. Interior parking garages State that parking garage floor drains will be plumbed to the sanitaty sewer. Inspect and maintain drains to prevent blockages and overflow. D1. Need for future indoor & structural pest control Note building design features that discourage entry of pests. Provide Integrated Pest Management information to owners, lessees, and operators. May, 2011 Page 17 Tabata Ranch SWMP IF THESE SOURCES WILL BE ON THE PROJECT SITE ... THEN YOUR STORMWATER CONTROL PLAN SHOULD INCLUDE THESE SOURCE CONTROL BMPs Potential Sources of Runoff Pollutants Permanent Controls—Show on Source Control Exhibit, Attachment B Permanent Controls—List in SUSMP Table and Narrative Operational BMPs—Include in SUSMP Table and Narrative HI 02. Landscape/ Outdoor Pesticide Use Note: Should be consistent with project landscape plan (if applicable). HI Show locations of native trees or areas of shmbs and ground cover to be undisturbed and retained. • Show s elf- retaining lands c ape areas, if any. HI Show stormwater treatment facilities. HI State that final landscape plans will accomplish all ofthe following: Preserve existing native trees, shrubs, and ground cover to the maximum extent possible. Design landscaping to tninimize irrigation and runoff, to promote surface infiltration where appropriate, and to minimize the use of fertilizers and pesticides that can contribute to stonnwater pollution. •Where landscaped areas are used to retain or detain stormwater, specify plants that are tolerant of saturated soil conditions. Consider using pest-resistant plants, especially adjacent to hardscape. To insure successful establishment, select plants appropriate to site soils, slopes, climate, sun, wind, rain, land use, air movement, ecological consistency, and plant interactions. • Maintain landscaping using minimum orno pesticides. See applicable operational BMPs in Fact Sheet S041, "Building and Grounds Maintenance," in the CASQA Stormwater Quality Handbooks at www.cabmphandbooks .com Provide IPM information to new owners, lessees and operators. May, 2011 Page 18 Tabata Ranch SWMP • E. Pools, spas, ponds, decorative fountains, and other water features. • F. Food service Show location of water feature and a sanitaty sewer cleanout in an accessible area within 10 feet • For restaurants, grocety stores, and other food service operations, show location (indoors orin a covered area outdoors) of a floor sink or other area for cleaning floor mats, containers, and equipment • On the drawing, show a note that this drain will be connected to a grease interceptor before discharging to the sanitary sewer. • If the local municipalily requires pools to be plumbed to the sanitary sewer, place a note on the plans and state in the narrative that this connection will be made according to local requirements. • Describe the location and features of the designated cleaning area. • Describe the items to be cleaned in this facility and how it has been sized to insure that the lai^est items can be accommodated. See applicable operational BMPs in Fact Sheet SC-72, "Fountain and Pool Maintenance," in the CASQA Stormwater Quality Handbooks at www.cabmphandbooks .com • G. Refuse areas Show where site refuse and recycled materials will be handled and stored for pickup. See local municipal requirements for sizes and other details of refuse areas. If dumpsters or other receptacles are outdoors, show how the designated area will be covered, graded, and paved to prevent run- on and show locations of berms to prevent runoff from the area. Any drains from dumpstere, compacton, and tallow bin areas shall be coimected to a grease removal device before dischatge to sanitary sewer. • State how site refuse will be handled and provide supporting detail to what is shown on plans. • State that signs will be posted on or near dumpsters with the words "Do not dump hazardous materials here" or similar. State how the following will be implemented: Provide adequate number of receptacles. Inspect receptacles regulariy; repair or replace leaky receptacles. Keep receptacles covered. Prohibit/prevent dumping of liquid or hazardous wastes. Post "no hazardous materials" signs. Inspect and pick up litter daily and clean up spills immediately. Keep spill control materials available on- site. See Fact Sheet S&34, "Waste Handling and Disposal" in the CASQA Stormwater Quality Handbooks at www.cabmphandbooks.com May, 2011 Page 19 Tabata Ranch .SWMP • H. Industrial processes. • Show process area. • If industrial processes are to be located on site, state: "All process activities to be performed indoors. No processes to drain to exterior or to storm drain system." See Fact Sheet SO 10, "Non- Stormwater Discharges" in the CASQA Stormwater Quality Handbooks at www.cabmphandbooks .com I. Outdoor storage of equipment or materials. (See rows J and K for source control measures for vehicle cleaning, repair, and maintenance.) • Show any outdoor storage areas, including how materials will be covered. Show how areas will be graded and bermed to prevent run- on or run-off from area. • Storage of non-hazardous liquids shall be covered by a roof and/or drain to the sanitary sewer system, and be contained by berms, dikes, liners, or vaults. • Storage of hazardous materials and wastes must be in compliance with the local hazardous materials ordinance and a Hazardous Materials Management Plan forthe site. • Include a detailed description of materials to be stored, storage areas, and structural features to prevent pollutants from entering storm drains. Where appropriate, reference documentation of compliance with the requirements of local Hazardous Materials Programs fon • Hazardous Waste Generation • Hazardous Materials Release Response and Inventory • Califomia Accidental Release (CalARP) • Aboveground Storage Tank • Uniform Fire Code Article 80 Section 103(b) & (c) 1991 • Underground Storage Tank See the Fact Sheets SO 31, "Outdoor Liquid Container Storage" and SO 33, "Outdoor Storage of Raw Materials " in the CASQA Stormwater Quality Handbooks at www.cabmphandbooks .com May, 2011 Page 20 Tabata Ranch SWMP • J. Vehicle and Equipment Cleaning • Show on drawings as appropriate: (1) Commercial/industrial facilities having vehicle /equipment cleaning needs shall either provide a covered, bermed area for washing activities or discourage vehicle/equipment washing by removing hose bibs and installing signs prohibiting such uses. (2) Multi-dwelling complexes shall have a paved, bermed, and covered car wash area (unless car washing is prohibited on-site and hoses are provided with an automatic shut- off to discourage such use), (3) Washing areas for cars, vehicles, and equipment shall be paved, designed to prevent mn-on to or runoff from the area, and plumbed to drain to the sanitary sewer. (4) Commercial car wash facilities shall be designed such that no runoff from the facility is discharged to the storm drain system. Wastewater from the facility shall discharge to the sanitary sewer, or a wastewater reclamation system shall be installed. • If a car wash area is not provided, describe measures taken to discourage on-site car washing and explain how these will be enforced. Describe operational measures to implement the following (if applicable): Washwater from vehicle and equipment washing operations shall not be dischatged to the storm drain system. Car dealerships and similar may rinse cars with water only. See Fact Sheet S&21, "Vehicle and Equipment Cleaning," in the CASQA Stormwater Quality Handbooks at www.cabmphandbooks .com May, 2011 Page 21 Tabata Ranch SWMP K. Vehicle/Equipment Repair and Maintenance • Accommodate all vehicle equipment repair and maintenance indoors. Or designate an outdoor work area and design the area to prevent run-on and runoff of stormwater. • Show secondary containment for exterior work areas where motor oil, brake fluid, gasoline, diesel fuel, radiator fluid, acid-containing batteries or other hazardous materials or hazardous wastes are used or stored. Drains shall not be installed within the secondary containment areas. • Add a note on the plans that states either (1) there are no floor drains, or (2) floor drains are connected to wastewater pretreatment systems prior to discharge to the sanitary sewer and an industrial waste discharge permit will be obtained. State that no vehicle repair or maintenance will be done outdoors, or else describe the required features of the outdoor work area. State that there are no floor drains or if there are floor drains, note the agency from which an industrial waste discharge permit will be obtained and that the design meets that agency's requirements. State that there are no tanks, containers or sinks to be used for parts cleaning or rinsing or, if there are, note the agency from which an industrial waste dischatge permit will be obtained and that the design meets that agency's requirements. a In the SUSMP report note that all of the following restrictions apply to use the site: No person shall dispose of, nor permit the disposal, directly or indirectly of vehicle fluids, hazardous materials, or rinsewater from parts cleaning into storm drains. No vehicle fluid removal shall be performed outside a building, nor on asphalt or ground surfaces, whether inside or outside a building, except in such a manner as to ensure that any spilled fluid will be in an area of secondary containment Leaking vehicle fluids shall be contained or drained from the vehicle immediately. No person shall leave unattended drip parts or other open containers containing vehicle fluid, unless such containets are in use orin an area of secondaty containment May, 2011 Page 22 Tabata Ranch SWMP • L. Fuel Dispensing Areas Fueling areas'shall have impermeable floors (i.e., pordand cement concrete or equivalent smooth impetvious surface) that are: a) graded at the minimum slope necessaty to prevent ponding; and b) separated ftom the rest of the site by a grade break that prevents mn-on of stormwater to the maximum extent practicable. Fueling areas shall be covered by a canopy that extends a minimum of ten feet in each direction from each pump. [Altemative: The fueling area must be covered and the cover's minimum dimensions must be equal to or greater than the area within the grade break or fuel dispensing area'.] The canopy [or cover] shall not drain onto the fueling area. • The property owner shall dry sweep the fueling area routinely. • See the Business Guide Sheet "Automotive Service—Service Stations" in the CASQA Stormwater QuaUty Handbooks at www.cabmphandbooks .com Tabata Ranch SWMP • M. Loading Docks • N. Fire Sprinkler Test Water a Show a preliminary design forthe loading dock area, including roofing and drainage. Loading docks shall be covered and/or graded to minimize run-on to and mnoff from the loading area. Roof downspouts shall be positioned to direct stormwater away from the loading area. Water from loading dock areas should be drained to the sanitaty sewer where feasible. Direct connections to storm drains from depressed loading docks are prohibited. Loading dock areas draining directly to the sanitaty sewer shall be equipped with a spill control valve or equivalent device, which shall be kept closed during periods of operation. Provide a roof overhang over the loading area or install door skirts (cowling) at each bay that enclose the end of the trailer. • Provide a means to drain fire sprinkler test water to the sanitaty sewer. Move loaded and unloaded items indoors as soon as possible. See Fact Sheet SO30, "Outdoor Loading and Unloading," in the CASQA Stormwater Quality Handbooks at www.cabmphandbooks .com See the note in Fact Sheet SO 41, "Building and Grounds Maintenance," in the CASQA Stormwater Quality Handbooks at www.cabmphandbooks .com May, 2011 Page 24 Tabata Ranch SWMP a a a • a O. Miscellaneous Drain or Wash Water Boiler drain lines Condensate drain lines Rooftop equipment Drainage sumps Roofing, gutters, and trim. P. Plazas, sidewalks, and parking lots. • • a Boiler drain lines shall be directiy or indirecdy connected to the sanitaty sewer system and may not discharge to the storm drain system. Condensate drain lines may discharge to landscaped areas if the flow is small enough that mnoff will not occur. Condensate drain lines may not dischatge to the storm drain system. Rooftop mounted equipment with potential to produce pollutants shall be roofed and/or have secondaty containment Any drainage sumps on-site shall feature a sediment sump to reduce the quantity of sediment in pumped water. Avoid roofing, gutters, and trim made of copper or other unprotected metals that may leach into mnoff. • Plazas, sidewalks, and parking lots shall be swept regulariy to prevent the accumulation of litter and debris. Debris from pressure washing shall be collected to prevent entty into the storm drain system. Washwater containing any cleaning agent or degreaser shall be collected and discharged to the sanitary sewer and not discharged to a storm drain. May, 2011 Tabata Ranch SWMP 7.0 HYDROMODIFICATION Hydromodification wUl be addressed as part of tiiis report The applicant acknowledges that the project as originaUy approved might need to change to comply with hydromodification requirements. The County's Hydromodification calculator wiii be used to determine detention pond requirements. Hydromodification management plan (HMP) was estabHshed to ensure flow rates and durations do not exceed pre-project runoff and to ensure there is no increased erosion or other significant adverse impacts to beneficial uses. Since no downstream channel smdies are avaUable at this time, the Hydromodification cakulations wiU be done conservatively, assuming the channel downstream is at high susceptibUity for erosion. The foUowing figures 2-2 and 2-3 are part of tiie HMP ApplicabUity Detemiination Figure 2-2 [ Btdof DwitienMamx j ,|REQUIRED C»«ofia^3J!««Deci5i«mM»liii' ' May, 2011 Page 26 Figure 2-3 Tabata Ranch SWMP Consiit nith Geotechnical Bigineer May, 2011 Page 27 Tabata Ranch SWMP 8.0 PROJECT PLAN(s) & BMP LOCATION MAP ATTACHMENTS A- Project Location Map B- Hydrology Maps showing tributary areas to each TCBMP or DMA's to IMPs G Print-outs from BMP sizing calculator D- Tabulation 1. Drainage Management Areas 2. Tabulation of DMA areas 3. DMA Descriptions (e.g.: pavement, roof, self-treating, etc.) 4. Listing all IMP, TCBMPs or flow control facilities serving each DMA 5. Sizing Calculations E- Copy of completed Storm Water Standards Questionnaire F- Single Sheet post-construction BMP exhibit G- Proprietary BMP product information and independent party May, 2011 Page 28 Tabata lUich SWMP 9.0 BMP MAINTENANCE 9.1 Facility Ownership & Maintenance Agreements The foUowing individual(s)/oTganization wiU own the facilities, including aU stmctural and non- stmctural BMPs, and are responsible for maintenance in perpetuity or untU transferred to the subdivision HOA: Nobum & Evelyn Tabata PO Box 679 arlsbad,CA 92018 Nobum Tabata Date The Tabata Ranch project wiU implement the foUowing maintenance mechanism to ensure ongoing long-term maintenance of aU stmctural and non-stmctural BMPs. Potential Permanent BMP Maintenance Mechanisms 1. • Execution of a Permanent Stormwater Quality BMP Maintenance Agreement that —runs with the land. 2. • Creation of a homeowners association (HOA) and execution of an agreement by the HOA to maintain the facilities as weU as an annual inspection fee. 9.2 Transferto public ownership The Gty wiU have treatment and flow-control facilities granted within an I.O.D. to maintain the facility as part of the BMP treatment system. The Qty may recoup the costs of maintenance through a special tax, assessment district, or similar mechanism. Private treatment and flow-control facilities such as filterras in the Qty right-of-way require the processing and recording of an Encroachment Agreement against the property to assure ongoing maintenance of the IMP. Even if the facility is may conveyed to the city, it is still the responsibility of the applicant to identify general operation and maintenance requirements, prepare a detaUed operation and maintenance plan, and to maintain the facility untU that responsibility is formaUy transferred. 9.3 Operations, Maintenance and Inspection May, 2011 Page 29 Tabata Ranch SWMP 9.3.1 Typical Maintenance Requirements The proposed LID measures and IMP facilities shaU be inspected and maintained according to the foUowing recommendations and according to the product manufacturer's suggested maintenance steps. 9.3.2 Bio-retention facilities (including self-retaining areas) Bioretention BMPs Inspection and Maintenance Checklist Typical Maintenance Indicators Typical Maintenance Actions Accumulation of sediment, litter, or debris Remove and properly dispose of accumulated materials, without damage to the vegetation. Poor vegetation establishment Examine the vegetation to ensure that it is healthy and dense enough to provide filtering and to protect soils from erosion. Replenish mulch as necessary, remove fallen leaves and debris, prune large shrubs or trees, and mow turf areas. Overgrown vegetation Mow or trim as appropriate, but not less than the design height of the vegetation (typically 4-6 inches for grass). Confirm that irrigation is adequate and not excessive and that sprays do not directly enter overflow grates. Replace dead plants and remove noxious and invasive vegetation. Erosion due to concentrated irrigation flow Repair/re-seed eroded areas and adjust the irrigation system. Erosion due to concentrated stormwater runoff flow Repair/re-seed eroded areas and make appropriate corrective measures such as adding erosion control blankets, adding stone at flow entry points, or re-grading where necessary. Standing water (BMP not draining) Abate any potential vectors by filling holes in the ground in and around the biofilter facility and by insuring that there are no areas where water stands longer than 48 hours following a storm. If mosquito larvae are present and persistent, contact the San Diego County Vector Control Program at (858) 694-2888. Mosquito larvicides should be applied only when absolutely necessary and then only by a licensed individual or contractor. Obstructed inlet or outlet structure Clear obstructions. Damage to structural components such as weirs, inlet, or outlet structures Repair or replace as applicable. May, 2011 Page 30 Tabata Ranch SWMP 9.3.3 Filtration Devices such as Manufactured Flow Through Planters (Bio-filterra) Filtration BNIPs Inspection and Maintenance Checklist Typical Maintenance Indicators Typical Maintenance Actions Accumulation of sediment, litter, or debris Remove and properly dispose of accumulated materials. Accumulation of floating oil and grease Remove and properly dispose of oil and grease. Clogged filter media Remove and properly dispose of filter media, and replace with fresh media. Damage to components of the filtration system Repair or replace as applicable. 9.3.4 Project BMP Verification The applicant's Engineer of Record and/or the Qty Engineer must verify through inspection of the site that the BMPs have been constmcted and implemented as proposed in the approved SWMP. The inspection must be conducted and Qty approval must be obtained prior to granting a certificate of occupancy. This approval may be verified through signatures on the as-buUt plans, specificaUy on the BMP sheet. 9.3.5 Annual BMP Operation and Maintenance Verification The BMP owner must verify annuaUy that the 06dM Plan is being implemented by submitting a setf- certification statement to the Qty. The verification must mclude a record of inspection of the BMPs prior to the rainy season (October 1" of each year). May, 2011 Page 31 Tabata Ranch SWMP ATTACHMENT A-Project Location Map May, 2011 Page 32 VICINITY MAP NTS Tabata Ranch SWMP ATTACHMENT B - Hydrology Maps showing tributary areas to each TCBMP orDMA's toIMPs May, 2011 Page 33 Tabata Ranch SWMP ATTACHMENT O Print-outs from BMP sizing calculator May, 2011 FageSA Consultants, Inc NTS ATA RANCH SINGLE SHEET BMP EXHIBIT DMA TABLE TYPE SYMBOL SIZE(SF) IMP ID # 10 PARKWAY STREET STREET STREET ROOF HARDSCAPE ROOF HARDSCAPE ROOF HARDSCAPE ROOF HARDSCAPE ROOF HARDSCAPE • • • • • n n • • • 15,000 1.500 6,000 2,100 2,100 4,500 (APPROX.) 4,500 (APPROX.) 4,500 (APPROX.) 4,500 (APPROX.) 4,500 (APPROX.) BIO FILTRATION BIO FILTRATION BIO FILTRATION BIO FILTERRA BIO FILTERRA BIO FILTRATION BIO FILTRATION BIO FILTRATION BIO FILTRATION BIO FILTRATION SYMBOL LOT# PAD AREA (SF) IMPERVIOUS SURFACE(SF) RECEIVING DMA(SF) REMAINDER (SF) 1 9.500 4,500 566 4,434 2 10,000 4,500 ODD 4,934 3 10,100 4,500 566 5,034 4 9,622 4,500 283 4,839 5 9,627 4,500 283 4,844 SWMP NO. 11-06 MAINTENANCE AGREEMENT: YES RECORDATION NO. TO BE DETERMINED PARTY RESPONSIBLE FOR MAINTENANCE: NAME: ADDRESS: PHONE: PLAN PREPARED BY: REC CONSULTANTS. INC. 2442 SECOND AVE SAN DIEGO, CA 92101 PHONE NUMBER: 619.232.9210 BMP NOTES: 1. THESE BMPS ARE MANDATED TO BE INSTALLED PER MANUFACTURES RECOMMENDATIONS OR THESE PLANS . 2. NO CHANGES TO THE PROPOSED BMP'S ON THIS SHEET WITHOUT PRIOR APPROVAL FROM THE CITY ENGINEER. 3. NO SUBSTITUTIONS TO THE MATERIAL OR TYPES OF PLANTING TYPES WITHOUT PRIOR APPROVAL OF THE CITY ENGINEER. 4. NO OCCUPANCY WILL BE GRANTED UNTIL THE CITY INSPECTION STAFF HAS INSPECTED THE PROJECT FOR APPROPRIATE BMP CONSTRUCTION AND INSTALLATION. 5. MAINTENANCE WILL BE TRANSFERRED FROM THE TABATA FAMILY TO THE HOMEOWNERS ASSOCIATION ONCE THE HOA IS FORMED. VERIFIED BY: INSPECTOR DATE SHEET CITY OF CARLSBAD ENGINEERING DEPARTMENT SHEETS SHEET CITY OF CARLSBAD ENGINEERING DEPARTMENT SHEETS DMA - BMP PLAN TABATA RANCH DMA - BMP PLAN TABATA RANCH DMA - BMP PLAN TABATA RANCH DMA - BMP PLAN TABATA RANCH DMA - BMP PLAN TABATA RANCH APPROVED APPROVED SENIOR CIVIL ENGINEER PE 41204 EXPIRES 3/31/11 DATE DATE INITIAL REVISION DESCRIPTION DATE INITIAL DATE INITIAL nWN RY- rwkn RY-PROJECT NO, CT 06-15 DRAWING NO. 471 9 SW ENGINEER OF WORK REVISION DESCRIPTION OTHER APPROVAL OTY APPROVAL RVWl RY PROJECT NO, CT 06-15 DRAWING NO. 471 9 SW PAAC<KJ\856 Toboto Ranch\SWVIP\DMA BASNS dwg 5/31/2011 2:56:27 PM POT Report Result Project Summary Page 1 of 1 Project Name TAEIATA RANCH Project Applicant REC CONSULTANTS Jurisdiction City of Caflsbad Parcel (APN) 00000000 hiydrologic Unit Carlsbad Compliance Basin Summary Basin Name: TABATA BASIN Receiving Water: UNDERGROUND PIPE Rainfall Basin Oceanside iUlean Annual Precipitation (incties) 13.3 Project Basin Area (acres): 8.00 Watersiied Area (acres): 8.00 SCCWRP Lateral Channel Susceptiblity (H, M, L): SCCWRP Vertifical Channei SusceptibUty (H, M, I): Overall Channel Susceptibility (H, M, L): HIGH Lower inow Threshold (% of J-Year Flow): 0.1 Drainage Management Area Summary ID Type BMP ID Description Area (ac) Pie 4>roject Cover Post Surface Type DrainageSoil Slope 6025 Drains to LID BMP 1 DRAINS TO BIORETENTION ATKNUCKLE 0.3 Pervious (Pre) Concrete or asphaR Type D (high runoff - day SOL.. Steep (greater 10%) 6026 Drains to LID BMP 1 DRAINS TO BIORETENTION AT KNUCKLE 0.03 Pervious (Pre) Landscaping Type D (high runoff - day SOI... Steep (greater 10%) 5028 Drains to LID BMP 2 DRAINS TO BIORETENTION END OF ROAD 0.1 Pervious (Pre) Concrete or asphalt Type D (high runoff - day SOi... Steep (greater 10%) 6030 Drains to LID BMPS DRAINS TO RLTERRA SOUTH 0.05 Pervious (Pre) Concrete or asphalt Type D (high runoff - day SOi... Steep (greater 10%) 6033 Drains to LID BMP 4 DRAINS TO RLTERRA NORTH O05 Pervious (Pre) Concrete or asphalt Type D (high runoff - day soi... Steep (greater 10%) 6275 Drains to LID BMPS LOT 1 - DRAINS TO BIORETENTION 0.1 Pervious (Pre) Roofs- Hardscape-Driveviray Type D (high runoff - day soi... Moderate (5-10%) 6276 Drains to LID BMP 6 LOT 2 - DRAINS TO BIORETENTION 01 Pervious (Pre) Roofs- Hardscajje-Driveviray Type D (high runoff - clay soi... Moderate (5-10%) 6277 Drains to LID BMP 7 LOT 3 - DRAINS TO BIORETENTION 0.1 Pervious (Pre) Roofs- Hardscape-Driveway Type D (high runoff - day soi... Moderate (5-10%) 6278 Drains to LiD BMP 8 LOT 4 - DRAINS TO BIORETENTION 01 Pervious (Pre) Roofs- Hardscape Type D (high runoff - clay sol... Steep (greater 10%) 6279 •rains to LID BMP 9 LOT 5 - DRAINS TO BIORETENTION 01 Pervious (Pre) Roofs- Hanjscape Type D (high mnoff - day soi... Sleep (greater 10%) LID Facility Summary BMP ID Type [description Plan Area (sqft) Volume 1(cft) Volume 2(cft) Orifice Flow (cfs) Orifice Size (inch) BMP1 Bioretention BIORETENTION CEU. 1016 847 609 0010 OS BMP 2 Bioretention BIORETENTION CEU. 396 330 237 0003 0.3 BMP 3 Row-Through Planter RLTERRA-TREATMENT ONLY ---- BMP 4 FIcw-Through Planter FILTERRA-TREATMENT ONLY ---- BMPS Bioretention BIORETENTION CEU. ON-LOT 1 566 471 339 0.002 0.2 BMP 6 Bioretention BIORETENTION CELL ON-LOT 2 565 471 339 0.002 0.2 BMP 7 Bioretention BIORETENTION CELL Olvl-LOT 3 566 471 339 0.002 0.2 BMPS Bioretention BIORETENTION CELL ON-LOT 4 283 236 169 O002 02 BMP 9 Bioretention BIORETENTION CELL ON-LOT 5 283 236 169 0002 0.2 http://uknow.bwncald.com/wastewater/Toolkits/Watershed/SiteToolkit/ReportResult.aspx?pid=138617&bid 5/31/2011 Tabata Ranch SWMP ATTACHMENT D- Tabulations 1. Drainage Management Areas 2. Tabulation of DMA areas 3. DMA Descriptions (e.g.: pavement, roof, self-treating, etc.) 4. Listing all IMP, TCBMPs or flow control facilities serving each DMA Sizing Calculations May, 2011 Page 35 |{E( Consultants, Inc. NTS ATA RANCH SINGLE SHEET BMP EXHIBIT ENQNEER OF WORK DMA TABLE DMA ID # TYPE SYMBOL S1ZE(SF) IMP ID # TYPE SYMBOL 1 STREET • 16,000 1 BIO FILTRATION n 2 PARKWAY • 1,500 1 BIO FILTRATION • 3 STREET • 6,000 2 BIO FILTRATION n 4 STREET • 2,100 3 BIO FILTERRA • 5 STREET • 2,100 4 BIO FILTERRA • 6 ROOF HARDSCAPE • 4,500 (APPROX.) 5 BIO FILTRATION L 7 ROOF HARDSCAPE • 4,500 (APPROX.) 6 BIO FILTRATION 8 ROOF HARDSCAPE 4,500 (APPROX.) 7 BIO FILTRATION 9 ROOF HARDSCAPE • 4,500 (APPROX.) 8 BIO FILTRATION 10 ROOF HARDSCAPE • 4,500 (APPROX.) 9 BIO FILTRATION _ LOT# PAD AREA (SF) IMPERVIOUS SURFACE(SF) RECEIVING DMA (SF) REMAINDER (SF) 1 9,500 4,500 566 4,434 2 10,000 4,500 566 4,934 3 10.100 4,.50n .566 5,034 4 9,622 4,500 283 4,839 5 9,627 4,500 283 4,844 SWMP NO. 11-06 MAINTENANCE AGREEMENT: YES RECORDATION NO. TO BE DETERMINED PARTY RESPONSIBLE FOR MAINTENANCE: NAME: ADDRESS: PHONE: PLAN PREPARED BY: REC CONSULTANTS, INC. 2442 SECOND AVE SAN DIEGO, CA 92101 PHONE NUMBER: 619.232.9210 BMP NOTES: 1. THESE BMPS ARE MANDATED TO BE INSTALLED PER MANUFACTURES RECOMMENDATIONS OR THESE PLANS . 2. NO CHANGES TO THE PROPOSED BMP'S ON THIS SHEET WITHOUT PRIOR APPROVAL FROM THE CITY ENGINEER. 3. NO SUBSTITUTIONS TO THE MATERIAL OR TYPES OF PLANTING TYPES WITHOUT PRIOR APPROVAL OF THE CITY ENGINEER. 4. NO OCCUPANCY WILL BE GRANTED UNTIL THE CITY INSPECTION STAFF HAS INSPECTED THE PROJECT FOR APPROPRIATE BMP CONSTRUCTION AND INSTALLATION. 5. MAINTENANCE WILL BE TRANSFERRED FROM THE TABATA FAMILY TO THE HOMEOWNERS ASSOCIATION ONCE THE HOA IS FORMED. REVISION DESCRIPTION OTY APPROVAL VERIFIED BY: INSPECTOR DATE CITY OF CARLSBAD ENGINEERING DEPARTMENT SHEETS DMA - BMP PLAN TABATA RANCH SENI(3R CIVIL ENQNEER PE 41204 EXPIRES 3/31/11 DATT OWN BY: . CHKD BY: RVWD BY: PROJECT NO. CT 06-15 DRAWING NO. 471 9 SW Report Result Page 1 of 1 Project Summary Project Name TABATA RANCH Project Applicant REC CONSULTANTS Jurisiiction City of Carlsbad Parcel (APN) OOOOOOOO Hydrologic Unit Carlsbad Compliance Basin Summary Basin Name: TABATABASIN Iteceh/ing Water UNDERGROUND PIPE RainfaH Basin Ocear^ide Mean Annual Precipitation (incites) 13.3 Project Basin Area (acres): 8.00 Watersiwd Area (acres): 8.0O SCCWRP Lateral Channel Susceptiblity (H, M, L): SCCWRP Vetiaical Channel SusceptUty (H, M, L): Overall Channel SuscepUbitty (H, IM, L): HIGH Lower Row Threshold (% of Z-Year Row): 0.1 Drainage Management Area Summary ID Type BMP ID Description Area (ac) 1^ ^'roject Cover Post Surface Type DrainageSoil Slope 6025 Drains to UD BMP 1 DRAINS TO BIORETENTION ATKNUCKLE 0.3 Pervious (Pre) Concrete or asphalt Type D (high runoff - day soi... Steep (greater 10%) 6026 Drains to UD BMP 1 DRAINS TO BIORETENTION AT KNUCKLE O03 Pen/tous(Pre) Landscaping Type D (high mnoff - clay sot... Steep (greater 10%) 6028 Drains to UD BMP 2 DRAINS TO BIORETENTION END OF ROAD 01 Pervious (Pre) Concrete or asphalt Type D (high mnoff - day soi... Steep (greater 10%) 6030 Drains to UD BMP 3 DRAINS TO RLTERRA SOUTH 0.05 Pervious (Pre) Concrete or asphalt Type D (Ngh runoff - clay soi... Steep (greater 10%) 6033 Drains to LID BMP 4 DRAINS TO RLTERRA NORTH O05 Pervious (Pre) Concrete or asphalt Type D (high mnolf - day sot... Steep (greater 10%) 6275 Drains to LID BMP 5 LOT 1 - DRAINS TO BIORETENTION 01 Pervious (Pre) Roofs- Hardscape.Driveway Type D (Ngh ninoff- clay soi... Moderate (5-10%) 6276 Drains to UD BMP 6 LOT 2 - DRAINS TO BIORETENTION 01 Pervbus(Pre) Roofs- Hardscape.Driveway Type D (high mnoff - clay soi... Moderate (5-10%) 6277 Drains to UD BMP 7 LOT 3 - DRAINS TO BIORETENTION 01 Pervious (Pre) Roofs- Hardscape-Driveway Type D (high runoff - clay sot... Moderate (5-10%) 6278 Drains to UD BMP 8 LOT 4 - DRAINS TO BIORETENTION 01 Pervious (Pre) Roofs- Hardscape Type D (high mrx3ff- day sot... Steep (greater 10%) 6279 Drains to UD BMP 9 LOT 5 - DRAINS TO BIORETENTION 01 Pervious (Pre) Roofs- Hardscape Type D (high runoff - clay soi... Steep (greater10%) LID Facility Summary BMP ID Type Description Plan Area (sqft) Volume 1(cft) Volume 2(cft) Orilice Flow (cfs) Orifice Size (inch) BMP1 Bioretention BIORETENTION CELL 1016 847 609 0.010 OS BMP 2 Bioretention BIORETEIfflON CELL 396 330 237 0003 0.3 BMP 3 Rcw-Ttirough f^lanter RLTERRA-TREATMENT ONLY ---- BMP 4 Row-Through Planter RLTERRA-TREATMENT ONLY ---- BMPS Bioretention BIORETENTION CELL ON-LOT 1 566 471 339 0.002 0.2 BMP 6 Bioretention BIORETENTION CELL ON-LOT 2 566 471 339 0.002 0.2 BMP 7 Bioretention BIORETENTION CELL ON-LOT 3 566 471 339 O002 0.2 BMP 8 Bioretention BIORETENTION CELL ON-LOT 4 283 236 169 0002 0.2 BMP 9 Bioretention BIORETENTION CELL Ofvl-LOT 5 283 236 169 0.002 0.2 http ://uknow.brwncald.com/wastewater/Toolkits/Watershed/SiteToolkit/ReportResult.aspx?pid=l 38617&bid=SDC-0001&sic=^ 5/31/2011 Tabata Ranch SWMP ATTACHMENT E- Copy of completed Storm Water Standards Questionnaire May, 2011 Page 36 STORM WATER Development Services Land Development Engineering ' SUM''- STANDARDS Development Services Land Development Engineering ^ CiTY OF QUESTIONNAIRE 1635 Faraday Avenue CARLSBAD E-34 760-602-2750 w/ww.carlsbadca.gov To address post-development pollutants that may be generated from development projects, the City requires that new development and significant redevelopment priority projects incorporate Permanent Storm Water Best Management Practices (BMP's) into the project design per the City's Standard Urban Stormwater Management Plan (SUSMP). To view the SUSMP, refer to the Engineering Standards (Volume 4, Chapter 2) at www.carlsbadca.gov/standards. Initially this questionnaire must be completed by the applicant in advance of submitting for a development application (subdivision, discretionary permits and/or construction permits). The results of the questionnaire determine the level of storm water standards that must be applied to a proposed development or redevelopment project. Depending on the outcome, your project will either be subject to 'Standard Stormwater Requirements' or be subject to additional criteria called 'Priority Development Project Requirements'. Many aspects of project site design are dependent upon the storm water standards applied to a project. Your responses to the questionnaire represent an initial assessment of the proposed project conditions and impacts. City staff has responsibility for making the final assessment after submission of the development application. If staff determines that the questionnaire was incorrectly filled out and is subject to more stringent storm water standards than initially assessed by you, this will result in the return ofthe development application as incomplete. In this case, please make the changes to the questionnaire and resubmit to the City. If you are unsure about the meaning of a question or need help in determining how to respond to one or more of the questions, please seek assistance from Land Development Engineering staff. A separate completed and signed questionnaire must be submitted for each new development application submission. Only one completed and signed questionnaire is required when multiple development applications for the same project are submitted concurrently. In addition to this questionnaire, you must also complete, sign and submit a Project Threat Assessment Form with construction permits for the project. Please start by completing Section 1 and follow the instmctions. Wtien completed, sign ttie form at ttie end and submit this with your application to the city. SECTI - NEW DEVELOPMENT...-1 Does your project meet one or more of the following criteria: YES NO 1. HousinQ subdivisions of 10 or more dwellinp units. Examples: single family homes, multi-family tiomes, condominium and apartments m 2. Commercial - areater than 1-acre. Any development ottier than heavy industry or residential. Examples: hospitals; laboratories and other medical facilities; educational institutions; recreational facilities; municipal facilities; commercial nurseries; multi-apartment buildings; car wash facilities; mini-malls and other business complexes; shopping malls; hotels; office buildings; public w/arehouses; automotive dealerships; airfields; and other light industrial facilities. • 3. Heavv Industrial 1 Industry- preater ttian 1 acre. Examples: manufacturing plants, food processing plants, metal working facilities, printing plants, and fleet storage areas (bus, truck, etc.). • 4. Automotive repair shop. A facility categorized in any one of Standard Industrial Classification (SIC) codes 5013, 5014, 5541, 7532-7534, and 7536-7539 • 5. Restaurants. Any facility that sells prepared foods and drinks for consumption, including stationary lunch counters and refreshment stands selling prepared foods and drinks for immediate consumption (SIC code 5812), where the land area for development is greater than 5,000 square feet. Restaurants where land development is less than 5,000 square feet shall meet all SUSMP requirements except for structural treatment BMP and numeric sizing criteria requirements and hydromodification requirements. • E-34 Page 1 of 3 REV 1/14/11 A STORM WATER Development Services Land Development Engineering A STANDARDS Development Services Land Development Engineering ^ CiTY OF QUESTIONNAIRE 1635 Faraday Avenue CARLSBAD E-34 760-602-2750 www.carlsbadca.gov 6. Hillside development. Any development that creates more than 5,000 square feet of impervious surface and is located in an area with known erosive soil conditions, where the development will grade on any natural slope that is twenty-five percent (25%) or greater. • 7 Environmentally Sensitive Area (ESA)\ All development located within or directly adjacent^ to or discharging directly'^ to an ESA (where discharges from the development or redevelopment will enter receiving waters within the ESA), which either creates 2,500 square feet or more of impervious surface on a proposed project site or increases the area of imperviousness of a proposed project site 10% or more of its naturally occurring condition. • 8. Parkina lot. Area of 5,000 square feet or more, or with 15 or more parking spaces, and potentially exposed to urban runoff 9 Streets, roads, hiahwavs, and freewavs. Any paved surface that is 5,000 square feet or greater used for the transportation of automobiles, trucks, motorcycles, and other vehicles • 10. Retail Gasoline Outlets. Serving more than 100 vehicles per day and greater than 5,000 square feet 11. Coastal Development Zone. Anv oroiect located within 200 feet of the Pacific Ocean and (1) creates more than 2500 square feet of impervious surface or (2) increases impervious surface on property by more than 10%. 12. More than 1-acre of disturbance. Proiect results in the disturbance of 1-acre or more of land and is considered a Pollutant-generating Development Project^. • Biological Significance by the State Water Resources Control Board (Water Quality Control Plan for the San Diego Basin (1994) and amendments); vnater bodies designated with the RARE beneficial use by the State Water Resources Control Board (Water Quality Control Plan for the San Diego Basin (1994) and amendments); areas designated as preserves or their equivalent under the Multi Species Conservation Program «rithin the Cities and County of San Diego; and any other equivalent environmentally sensitive areas which have been identified by the Copermittees. 2 "Directly adjacent" means situated within 200 feet of the Environmentally Sensitive Area. 3 "Discharging directly to" means outflow from a drainage conveyance system that is composed entirely of flows from the subject development or redevelopment site, and not commingled with flow from adjacent lands. 4 Pollutant-generating Development Projects are those projects that generate pollutants al levels greater than background levels. In general, these include all projects that contribute to an exceedance to an impaired water body or which create new impervious surfaces greater than 5000 square feet and/or introduce new landscaping areas that require routine use of fertilizers and pesticides. In most cases linear pathway projects that are for infrequent vehicle use, such as emergency or maintenance access, or for pedestrian or bicycle use, are not considered Pollutant-generating Development Projects if they are built with pervious surfaces or if they sheet flow to surrounding pervious surfaces. INSTRUCTIONS: Section 1 Results: If you answered YES to ANY of the questions above, your project is subject to Priority Development Project requirements. Skip Section 2 and please proceed to Section 3. Check the "meets PRIORITY DEVELOPMENT PROJECT requirements" box in Section 3. Additional stomn water requirements will apply per the SUSMP. If you answered NO to ALL of the questions above, then please proceed to Section 2 and follow the instructions. E-34 Page 2 of 3 REV 1/14/11 A STORM WATER Development Services Land Development Engineering A STANDARDS Development Services Land Development Engineering C 1 1 V O f QUESTIONNAIRE 1635 Faraday Avenue CARLSBAD E-34 760-602-2750 www.carlsbadca.gov SECTION21 iS-,"!!*»?' >:j|.'..^'-'iBi4 .-r'siGNIFICANT REDEVELOPMENT • f I 'jf . --"'-!"'A*fff ' INSTRUCTIONS: Complete the questions below regarding your project YES NO 1. Project results in the disturbance of 1-acre or more of land and is considered a Pollutant-generating Development Proiect *? INSTRUCTIONS: If you answered NO, please proceed to question 2. If you answered YES, then you ARE a significant redevelopment and you ARE subject to PRIORITY DEVELOPMENT PROJECT reauirements. Please check the "meets PRIORITY DEVELOPMENT PROJECT requirements" box in Section 3 below. 2. Is the project redeveloping an existing priority project type? (Priority projects are defined in Section 1) INSTRUCTIONS: If you answered YES, please proceed to question 3. If you answered NO, then you ARE NOT a significant redevelopment and your project is subject to STANDARD STORMWATER REQUIREMENTS. Please check the "does not meet PDP requirements" box in Section 3 below. 3. Is the work limited to trenching and resurfacing associated with utility work; resurfacing and reconfiguring surface parking lots and existing roadways; new sidewalk; bike lane on existing road and/or routine maintenance of damaged pavement such as pothole repair? Resurfacing/reconfiguring parking lots is where the work does not expose underlying soil during construction. INSTRUCTIONS: If you answered NO, then proceed to question 4. If you answered YES, then you ARE NOT a significant redevelopment and your project is subject to STANDARD STORMWATER REQUIREMENTS. Please check the "does not meet PDP requirements" box in Section 3 below. 4. Will your redevelopment project create, replace, or add at least 5,000 square feet of impervious surfaces on existing developed property or will your project be located within 200 feet of the Pacific Ocean and (1) create 2500 square feet or more of impervious surface or (2) increases impervious surface on the property by more than 10%? Replacement of existing impervious surfaces includes any activity that is not part of routine maintenance where impervious material(s) are removed, exoosinq underlying soil durinq construction. INSTRUCTIONS: If you answered YES, you ARE a significant redevelopment, and you ARE subject to PRIORITY DEVELOPMENT PROJECT requirements. Please check the "meets PRIORITY DEVELOPMENT PROJECT requirements" box in Section 3 below. Review SUSMP to find out if SUSMP requirements apply to your project envelope or the entire project site. If you answered NO, then you ARE NOT a significant redevelopment and your project is subject to STANDARD STORMWATER REQUIREMENTS. Please check the "does not meet PDP requirements" box in Section 3 below. *for definition see Footnote 4 on page 2 • My project meets PRIORITY DEVELOPMENT PROJECT (PDP) requirements and must comply with additional stormwater criteria per the SUSMP and I understand I must prepare a Storm Water Management Plan for submittal at time of application. I understand flow control (hydromodification) requirements may apply to my project. Refer to SUSMP for details. My project does not meet PDP requirements and must only comply with STANDARD STORMWATER REQUIREMENTS per the SUSMP. As part of these requirements, I will incorporate low impact development strategies throughout my project. Applicant Infonnation and Signature Box This Box for City Use Oniy Address: Lonicera Street, south of Veronica Ct Assessor's Parcel Number(s): 214-631-20,21 Applicant Name: REC Consultants Inc-Bruce Robertson Applicant Title: Principal Applicant Signature: Date: City Concurrence: YES NO By; Oate: Project ID: E-34 Page 3 of 3 REV 1/14/11 Tabata Ranch SWMP ATTACHMENT F-Single Sheet post-construction BMP exhibit May, 2011 Page 37 BMP TABLE BMP ID # BMP TYPE SVI/BOL CASQA NO. QUANTITY DRAWING NO. 1 INSPECTION SHEET NO.|S)| FREQjENCY MAINTENANCE FREQUENCY CONSTRUCTION SIGN OFF TREAT MENT CONTROL 0-® BIO FILTER ©-0 BIORETENTION AREA n SOURCE CONTROL LANDSCAPED AREA ©-<5) STENCILED INLETS NTS SWMP NO MAINTENANCE AGREEMENT DOCUMENT: YES. RECORDATION NO. PARTY RESPONSIBLE FOR MAINTENANCE: NAME CONTACT PLAN PREPARED BY: NAME COMPANY ADDRESS CERTIFICATION. BMP NOTES: 1. THESE BMPS ARE MANDATORY TO BE INSTALLED PER MANUFACTURER'S RECOMMENDATIONS OR THESE PLANS. 2. NO CHANGES TO THE PROPOSED BMPS ON THIS SHEET WITHOUT PRIOR APPROVAL FROM THE CfTY ENGINEER 3. NO SUBSTITUTIONS TO THE MATERIAL OR TYPES OR PLANTING TYPES WITHOUT PRIOR APPROVAL FROM THE CITY ENGINEER 4. NO OCCUPANCY WILL BE GRANTED UNTIL THE CITY INSPECTION STAFF HAS INSPECTED THIS PROJECT FOR APPROPRIATE BMP CONSTRUCTION AND INSTALLATION. VERWED BY: SHEET CITY OF CARISBAD ENGMEERING DEPMrnCNT SHtEIS SHEET CITY OF CARISBAD ENGMEERING DEPMrnCNT SHtEIS BMP SITE PLAN TABATA RANCH BMP SITE PLAN TABATA RANCH BMP SITE PLAN TABATA RANCH BMP SITE PLAN TABATA RANCH BMP SITE PLAN TABATA RANCH APPROVED APPROVED SOMR OW. OQNEER PE 412M E3WRES 3/31/11 DATE DATE wnwL REVISION DESCRIPTION DATE NDM. DAIE HIUU. 0«m BY CHKD RVWD B '• PROJECT NO. CT 06-15 ORAWNG NO. EMOWEER OF WORK REVISION DESCRIPTION OTIBI tfPKNH. OTY APPROVN. 0«m BY CHKD RVWD B <: PROJECT NO. CT 06-15 ORAWNG NO. Tabata Ranch SWMP ATTACHMENT G-Proprietaiy BMP product infomiation and independent 3"* party May, 2011 Page 38 CHAPTER 4: LID DESIGN GUIDE Self-TVeating and Self-Retaining Areas • CRITERIA Rainfall on self-treating areas infiltrates or—during intense storms— drains directly off-site or to the storm drain system. Self-retaining areas are designed to retain the first one inch of rainfall •withovit producing any runoff Duiir^ intense storms, runoff may drain off- site, to the stotm drain system, or to IMPs. Best Uses • Heavily landscaped sites Advantages • Complements site landscaping Limitations • Requires substantial square footage • Requires soil information with adequate drainage • Need drainage overflow design • Grading requirements must be coordinated with landscape design LID design seeks to manage runoff from roofs and paving so effects on water quality and hydrology are minimized. Runoff from landscaping, however, does not need to be managed the same way. Runoff from landscaping can be managed by creating self-treating and self-retaining areas. Self-treating areas are natural, landscaped, or mrf areas that drain direcdy off site or to the storm drain system. Examples include upslope undeveloped areas that are ditched and drained around a development and grassed slopes that drain offsite to a street or storm drain. Self-treating areas may not drain on to adjacent paved areas. Where a landscaped area is upslope from or surrounded by paved areas, a self-retaining area (also called a zero-discharge area) may be created. Self-retaining areas are designed to retain the first one inch of rainfall without producing any runoff The technique works best on flat, heavily landscaped sites. It may be used on mild slopes if there is a reasonable expectation that the first inch of rainfall would produce no runoff. To create self-retaining turf and landscape areas in flat areas or on terraced slopes, berm the area or depress the grade into a concave cross-section so that these areas will retain the first inch of rainfall. Inlets of area drains, if any, should be set 3 inches above the low point to allow ponding. Areas draining to self retaining areas. Provided that onsite soil infiltration rates are verified by the Geotechnical Engineer, then drainage from roofs and paving can be directed to self-retaining areas and allowed to infiltrate into the soil. The maximum allowable ratio is 2 parts impervious: 1 part pervious. 78 City of Carlsbad SUSMP— January 14, 2011 SECTION 4: LID DESIGN GUIDE The self-retaining area must be bermed or depressed to retain an inch of rainfall including the flow from the tributary impervious area. • DETAILS Drainage from self-treating areas must flow to off-site streets or storm drains without flowing on to paved areas. Pavement within a self-treating area cannot exceed 5% of the total area. In self-retaining areas, overflows and area drain inlets should be set high enough to ensure ponding over the entire surface of the self-retaining area. -!• (MIN.5 Set overflows and area drain inlets hig^ enough to ensure ponding (3" deep) over the surfece of the self-retaining area. Self-retaining areas should be designed to promote even distribution of ponded runoff over the area. Leave enough reveal (from pavement down to landscaped surface) to accommodate buildup of turf or mulch. • APPLICATIONS Well-draining soil supported by soil percolation rates verified by Geotechnical Engineer Lawn or landscaped areas adjacent to streets can be considered self-treating areas. Self-retaining areas can be created by depressing lawn and landscape below surrounding sidewalks and plazas. Runoff from walkways or driveways in parks and park-like areas can sheet-flow to self-retaining areas. Roof leaders can be connected to self-retaining areas by piping beneath plazas and walkways. If necessary, a "bubble-up" can be used. 79 City of Carisbad SUSMP— January 14, 2011 SECTION 4: LID DESIGN GUIDE Connecting a loof leader to a self-retaining area. The head from the eave height makes it possible to route roof drainage some distance away from the building. Coordinate with soils engineer as necessary Self-retaining areas can be created by terracing mild slopes. The elevation difference promotes subsurface drainage. RETENTION AREA/ TERRACE- Mild slopes can bc terraced to create self retaining areas. • DESIGN CHECKLIST FOR SELF-TREATING AREAS • The self-treating area is at least 95% lawn or landscaping (not more than 5% impervious). • Re-graded or re-landscaped areas have amended .soils, vegetation, and irrigation as may be required to maintain soil stability and permeability. • Runoff from the self-treating area does not enter a TCBMP/IMP or another drainage management area, but goes directly to the storm drain system. 80 City of Cartsbad SUSMP— January 14, 2011 SECTION 4: LID DESIGN GUIDE • DESIGN CHECKLIST FOR SELF-RETAINING AREAS D Area is bermed all the way around or graded concave. • NX'hen impervious area is directed to a self retaining area, provide volume calculations to show that 1-inch of rainfaU over the study area can be retained. • Slopes do not exceed 4%. n Entire area is lawn, landscaping, or pervious pavement (see criteria in Section 4). • Area has amended soils, vegetation, and irrigation as may be required to maintain soil stability and permeability. • Provide soil percolation rates and design details to show that self retaining area will drain properly after a storm event (within 72-hours or as determined by County Health Department) and will handle larger stonn events. • Any area drain inlets are at least 3-inches above surrounding grade. • When self-retaining area become large, select and size a TCBMP/IMP to treat the runoff • DESIGN CHECKLIST FOR AREAS DRAINING TO SELF-RETAINING AREAS • Ratio of tributary impervious area to self-retaining area is not greater than 2:1. • Roof leaders collect runoff and route it to the self-retaining area. • Paved areas are sloped so drainage is routed to the self-retaining area. • Oudets/Inlets are designed to protect against erosion and distribute runoff across the area. • Design accommodates 100-year event as well as treatment volumes 81 City of Carisbad SUSMP— January 14, 2011 CHAPTER 4: LID DESIGN GUIDE Pervious Pavements • CRITERIA Impervious roadways, driveways, and parking lots account for much of the hydrologic impact of land development. In contrast, pervious pavements allow rainfall to collect in a gravel or sand base course and infiltrate into native soil. Pervious pavements are designed to transmit rainfall through the surface to storage in a base course. For example, a 4-inch-deep base course provides approximately 1.6 inches of storage. Runoff stored in the base course infiltrates to native soils over time. Except in the case of solid pavers, the surface course provides additional storage. Areas with the following pervious pavements may be regarded as "self-treating" and require no additional treatment or flow control if they drain off-site (not to an TCBMP/IMP). • Pervious concrete • Porous asphalt • Crushed aggregate (gravel) • Open pavers with grass or plantings • Open pavers with gravel • Artificial turf Areas with these pervious pavements can also be self-retaining areas and may receive runoff from impervious areas if they are bermed or depressed to retain the first one inch of rainfaU, including runoff from the tributary impervious area. To be self-retaining, the base course shall not be drained. Solid unit pavers—such as bricks, stone blocks, or precast concrete shapes—are considered to reduce runoff compared to impervious pavement, when the unit pavers are set in sand or gravel with d" gaps between the pavers. Joints must be filled with an open-graded aggregate free of fines. When draining pervious pavements to an TCBMP/IMP, use the runoff factors in Table 4-2. Best Uses • Areas with permeable native soils • Low-traffic areas • Where aesthetic quality can justify higher cost Advantages • Reduces DMA factors for stormwater design • Variety of surface treatments can complement landscape design Limitations • Initial cost • Placement requires specially trained crews • Geotechnical concerns, especially in clay soils • Concerns about pavement strength and surface integrity • May not be allowed in public right of way unless specifically approved 82 City of Carisbad SUSMP— January 14, 2011 SECTION 4: LID DESIGN GUIDE • DETAILS Permeable pavements can be used in clay soils; however, special design considerations, including an increased depth of base course, typically apply and will increase the cost of this option. Geotechnical fabric between the base course and underlying clay soil is recommended. Include calculations that demonstrate that retaining storm water in the base course will be absorbed into underlying soil within 72-hours. Pavement strength and durability typically determines the required depth of base course. If underdrains are used, the outiet elevation must be installed at the height necessary to detain the treatment volume required in the base course. Pervious concrete and porous asphalt must be installed by crews with special training and tools. Industry associations maintain lists of qualified contractors. Parking lots with crushed a^egate or unit pavers may require signs or bollards to organize parking. • DESIGN CHECKLIST FOR PERVIOUS PAVEMENTS • No erodible areas drain on to pavement. • Subgrade is uniform. Compaction is minimal. n Reservoir base course is of open-graded crushed stone. Base depth is adequate to retain rainfall treatment volume and support design loads. n If a subdrain is provided, oudet elevation is installed at the height necessary to detain the treatment volume required in of base course. • Subgrade is uniform and slopes are not so steep that subgrade is prone to erosion, n Rigid edge is provided to retain granular pavements and unit pavers. • Solid unit pavers are installed with open gaps filled with open-graded aggregate free of fines. • Permeable pavements are installed by industry-certified professionals according to vendor's recommendations. n Selection and location of pavements incorporates Americans with Disabilities Act requirements, site aesthetics, and uses. • Design accommodates 100-year event as well as treatment volumes Resources • Southern Califomia Concrete Producers www.concreteresources.net. • California Asphalt Pavement Association http://www.califomiapavements.org/stormwater.html • Interlocking Concrete Pavement Institute http://www.icpi.org/ • Start at the Source Design Manual for Water QuaUty Protection, pp. 47-53. www.basmaa.orp • ?orous Pavements, by Bruce K. Ferguson. 2005. ISBN 0-8493-2670-2. 83 City of Carisbad SUSMP— January 14, 2011 SECTION 4: LID DESIGN GUIDE This page intentionally left blank 84 City of Carlsbad SUSMP— January 14, 2011 SECTION 4: LID DESIGN GUIDE Bioretention Facilities 18" mh. sml/conpost mk Ckm 2 penn; 13* dqtSi Ijp. . Use sizMig fodor k> determine mnimum cvea Bioretention facility configured for treatment-only requirements. Bioretention facilities can rectangular, linear, or nearly any shape Bioretention detains runoff in a surface reservoir, filters it through plant roots and a biologically active soil mix, and then infiltrates it into the ground. Where native soils are less permeable, an underdrain conveys treated runoff to storm drain or surface drainage. Bioretention facilities can be configured in nearly any shape. When configured as linear swales, they can convey high flows while percolating and treating lower flows. Bioretention facilities can be configured as in-ground or above- ground planter boxes, with the bottom open to allow infiltration to native soils underneath. If infiltration cannot be allowed, use the sizing factors and criteria for the Flow-Through Planter. • CRITERIA For development projects subject only to runoff treatment requirements, the following criteria apply: Best Uses • Commercial areas • Residential subdivisions • Industrial developments • Roadways • Parking lots • Fit in setbacks, medians, and other landscaped areas Advantages • Can be any shape • Low maintenance • Can be landscaped Limitations • Require 4% of tributary impervious square footage • Typically requires 3-4 feet of head • Irrigation typically required Parameter Soil mix depth Soil mix minimum percolation rate Soil mix surface area Criterion 18 inches minimum 5 inches per hour minimum sustained (10 inches per hour initial rate recommended) 0.04 times tributary impervious area (or equivalent) 85 City of Carlsbad SUSMP— January 14, 2011 SECTION 4: LID DESIGN GUIDE Parameter Surface reservoir depth Underdrain Criterion 6 inches minimum; may be sloped to 4 inches where adjoining walkways. Required in Group "C" and "D" soils. Perforated pipe embedded in gravel ("Class 2 permeable" recommended), connected to storm drain or other accepted discharge point. DETAILS Plan. On the surface, a bioretention facility should be one level, shallow basin—or a series of basins. As runoff enters each basin, it should flood and fill throughout before runoff overflows to the oudet or to the next downstream basin. This will help prevent movement of surface mulch and soil mix. Use check dams for linear bioretention facilities (swales) on a slope. In a linear swale, check dams should be placed so that the lip of each dam is at least as high as the toe of the next upstream dam. A similar principle applies to bioretention facilities built as terraced roadway shoulders. Inlets. Paved areas draining to the fadlity should be graded, and inlets should be placed, so that runoff remains as sheet flow or as dispersed as possible. Curb cuts should be wide (12" is recommended) to avoid clogging with leaves or debris. AUow for a minimum reveal of 4"-6" between the inlet and soil mix elevations to ensure turf or mulch buildup does not block the inlet. In addition, place an apron of stone or concrete, a foot square or larger, inside each inlet to prevent vegetation from growing up and blocking the inlet. 86 City of Carisbad SUSMP— January 14, 2011 SECTION 4: LID DESIGN GUIDE Recommended design details for bioretention facility inlets (see text). Where runoff is collected in pipes or gutters and conveyed to the facility, protect the landscaping from high-velocity flows with energy-dissipating rocks. In larger installations, provide cobble- lined channels to better distribute flows throughout the facility. Upturned pipe outiets can be used to dissipate energy when runoff is piped from roofs and upgradient paved areas. Soil mix. The required soil mix is similar to a loamy sand. It must maintain a minimum percolation rate of 5" per hour throughout the Ufe of the facility, and it must be suitable for maintaining plant Hfe. Typically, on-site soils wiU not be suitable due to clay content. Storage and drainage layer. "Class 2 permeable," Caltrans specification 68-1.025, is recommended. Open-graded crushed rock, washed, may be used, but requires 4"-6" washed pea gravel be substituted at the top of the crushed rock gravel layers. Do not use filter fabric to separate the soil mix from the gravel drainage layer or the gravel drainage layer from the native soil. 87 City of Carisbad SUSMP— January 14, 2011 SECTION 4: LID DESIGN GUIDE Underdrains. No underdrain is required where native soils beneath tiie facility are Hydrologic Soil Group A or B. For treatment-only facilities where native soils are Group C or D, a perforated pipe must be bedded in the gravel layer and must terminate at a storm drain or other approved discharge point. Outiets. In treatment-only facilities, oudets must be set high enough to ensure the surface reservoir fills and the entire surface area of soil mix is flooded before the oudet elevation is reached. In swales, this can be achieved with appropriately placed check dams. The outiet should be designed to exclude floating mulch and debris. Vaults, utility boxes and light standards. It is best to locate utilities outside the bioretention facility—^in adjacent waUcways or in a separate area set aside for tiiis purpose. If utility structures are to be placed within the facility, the locations should be anticipated and adjustments made to ensure the minimum bioretention surface area and volumes are achieved. Leaving die final locations to each individual utility can produce a haphazard, unaesthetic appearance and make the bioretention facility more difficult to maintain. Emergency overflow. The site grading (construction) plan shall include details that demonstrate the bioretention basin can handle larger (up to 100-year) storm events and address potential clogging of the overflow and route emergency overflows safely. Trees. Bioretention areas can accommodate small or large trees. There is no need to subtract the area taken up by roots from die effective area of the facility. Extensive tree roots maintain soil permeability and help retain runoff Normal maintenance of a bioretention facility should not affect tree lifespan. The bioretention facility can be integrated witii a tree pit of the required depth and filled with structural soil. If a root barrier is used, it can be located to allow tree roots to spread throughout the bioretention facility while protecting adjacent pavement. Locations and planting elevations should be selected to avoid blocking the facility's inlets and outiets. ROOT BARRIER Bioretention facility configured as a tree well. The root barrier is optional. 88 City of Carisbad SUSMP lanuary 14, 2011 SECTION 4: LID DESIGN GUIDE • APPLICATIONS Multi-purpose landscaped areas. Bioretention facilities are easily adapted to serve multiple purposes. The loamy sand soil mix wiU support turf or a plant palette suitable to the location and a well-drained soil. Example landscape treatments: Lawn with sloped transition to adjacent landscaping. Swale in setback area Swale in parking median Lawn with hardscaped edge treatment Decorative garden with formal or informal plantings Traffic island with low-maintenance landscaping Raised planter with seating Bioretention on a terraced slope r Bioretention facilit}' configured as a recessed decorative lawn with hardscaped edge. Bioretention facility configured and planted as a lawn/ play area. 89 City of Carisbad SUSMP— January 14, 2011 SECTION 4: LID DESIGN GUIDE Residential subdivisions. Some subdivisions are designed to drain roofs and driveways to the streets (in the conventional manner) and then drain the streets to bioretention areas, with one bioretention area for each 1 to 6 lots, depending on subdixnsion layout and topography. Bioretention areas may be placed on separate, joindy-owned parcel(s). Bioretention fecdlity receiving dtainage from individual lots and the street in a residential subdivision. Sloped sites. Bioretention facilities must be constructed as a basin, or series of basins, with the circumference of each basin set level. It may be necessary to add curbs or low retaining walls. PMKIK& ovBSFus* amsr. Bioretention fadlity configured as a parking median. Note use of bollards in place of curbs, eliminating the need for curb cuts. 90 City of Carisbad SUSMP— January 14, 2011 SECTION 4: LID DESIGN GUIDE Design Checklist for Bioretention • Volume or depth of surface reservoir meets or exceeds minimum. • 18" depth "loamy sand" soil mix with minimum long-term percolation rate of 5"/hour. • Area of soil mix meets or exceeds minimum. • Perforated pipe underdrain bedded in "Class 2 perm" with connection and sufficient head to storm drain or discharge point (except in "A" or "B" soOs). • No filter fabric. • Underdrain has a clean-out port consisting of a vertical, rigid, non-perforated PVC pipe, with a minimum diameter of 6 inches and a watertight cap. • Location and footprint of facility are shown on site plan and landscaping plan. n Bioretention area is designed as a basin (level edges) or a series of basins, and grading plan is consistent with these elevations. If facility is designed as a swale, check dams are set so the lip of each dam is at least as high as the toe of the next upstream dam. • Inlets are 12" wide, have 4"-6" reveal and an apron or other provision to prevent blockage when vegetation grows in, and energy dissipation as needed. • Overflow connected to a downstream storm drain or approved discharge point. • Emergency spillage will be safely conveyed overland. • Plantings are suitable to the climate and a well-drained soil. • Irrigation system with connection to water supply. • Vaults, utility boxes, and light standards are located outside the minimum soil mix surface area. • When excavating, avoid smearing of the soils on bottom and side slopes. Minimize compaction of native soils and "rip" soils if clayey and/or compacted. Protect the area from construction site runoff 91 City of Carisbad SUSMP— January 14, 2011 SECTION 4: LID DESIGN GUIDE MsiN ouan (SEE BCTKQ. nyKSKf/asMDiTi EMeXOCNCY snuxAv rw> OF a«sm PLAN VIEW NOT TO SCHiU TOREBllY/CiaNOUT PEBFD««ra PlPt- CUSS 3 POW. (NOIE 7) PLWUHG UK e NOTE SUSntCE *«EA uun DETEfMNED 8r PftEKt OF SPECHTED PUM«HH6 tiBX. mmi IS 60WBBIE0 wr THE OWUT 3l>llt OfyMlON. RW «0UII1ED SURWCt «(» ROTR TO UC WCTOBS tOlMTWMS IH THE STtWMUMTOt CJ CUDEBOatC VJ srawct KcounxHB) mm wnLmmcm «CHES. PEi«R)fi»iHi PtPts. aJSS 2 PERM OB OIHES AT THE DESGNIBS OBCHTnON. Bioretraition Facility 92 City of Carisbad SUSMP— January 14, 2011 SECTION 4: LID DESIGN GUIDE njMSE * ORIFICe PUfll COKNCCDON (SEE NOIE t) CLOSXa MESH SMTE (<Sm. NOTES 4 Tt«U 7) PUW N.Ti, CUISCD UESH OttTE (CEN. NOW 4 nm) 7) SPtJWIEO SOI. W ORIFICE PUOE MIN SUMS. KMENSONS 1.0 n CRE*It« WAN PPC 01*. HOTHOP QtLwaa PtAiE *niR HOLES HWE BEEN ORUfD NOTE I. omncE puot * R*N(K CONNKTOH » CONCIirrE SMMi BE FtTFEn WtlW 30 OimOMETEK NEOPRENE fONC. OWMEIEB {0W5 ai azm PER DESIGN OBIOM ^^TXA HOLE (nP) f LOW CXXJTRO. ORIFICE FIATE Bioretention Fadlity Outlet Detail - A 93 City of Carisbad SUSMP— January 14, 2011 WESTERN ZONE Engineering Design Assistance Kit (DAKit) v08 - WZ Bioretention Systems A Growing Idea in Stormwater Filtration (866) 349-3458 (866) 349-3458 (804) 798-8400 ciesign@filterra.Gom www.filterra.com Engineering Sales Fax E-mail Web Filterra® Stormwater Bioretention Filtration System Copyright © 2009 by Filterra Bioretention Systems, a division of Americast Reproduction of these detail drawings is permitted for use only in site plans or contract documents for eventual supply by Americast or its authorized dealer. Other uses are prohibited and may infringe copyright or patent protection laws. Copyright © 2009 by Filterra® Bioretention Systems a Division of Americast. www.filterra.coin Bioretention Systems Introduction and Scope of this Document At federal, state and local levels, stormwater management is increasingly important. Americast's Filterra® units can help developers comply with NPDES legislation by removing pollutants, using a small efficient natural system that is both cost-effective and reliable. This document is compiled to assist engineers in the proper design for the best results where Filterra® is used for stormwater quality management. We want your project to be successful and it is important to this success that you follow guidelines contained herein. Please review the essential reading section (p. 6). It is essential to: • Adhere to the Design Guidelines, p.7 • Size the Filterra® unit correctly, using the regional Sizing Table, p. 11 • Add Flowline detail (p.24). Gutter detail (p.25) and Plan Notes (p.26, 27) to your plans • Complete the Project Information Form (p.9) & submit with plans to Americast for review before permitting. THIS REVIEW IS MANDATORY for warranty to apply and helps ensure that each Filterra® system operates efficiently to maximize performance and minimize maintenance. Other documents available on request include: Technical Whitepaper Filterra Product Performance Data Summary Third Party Data Letters of BMP Approval by various Agencies Installation, Operation & Maintenance Manual Scientific paper more fiilly explaining processes occurring within the system Data sheet providing the latest facts available Data presented by independent parties Copies of official approvals where available Owner's manual presenting technical and operational details. www.fllterra.com Table of Contents Bioretention Systems Introduction and Scope of this Document 3 A. Essential Reading - Filterra® Overview Filterra® Overview 6 Design Guidelines for using Filterra® 7 Items Considered in Filterra® Plan Reviews 8 Filterra® Project Information Form - IMPORTANT. 9 Filterra® Project Process Flowchart 10 Table 1: Filterra Quick Sizing Table 11 Guideline GUI-A: Filterra Grading & Gutter Flow. 12 Guideline GU2: Filterra Avoid Head-On Gutter Flow. 13 Guideline GU3: Filterra Parking Lot Comers 14 B, Filterra® Plans, Placement & Grading Scenario PLFl: Typical Filterra® Parking Lot Applications 16 Scenario PLG2: Filterra'^Parking Lot Island Applications 17 ScenarioPLGS: Filterra® Parking Lot Corner Applications 18 Drawing FTHYD-1: Typical Filterra® Hydromodification Configuration 19 Drawing FTSWL-1: Typical Filterra® Swale Configuration 20 Drawing FTSC-4: Typical Filterra® Sidewalk Configuration 21 Drawing FTRDF-1: Filterra® Roof Drain Flume Application 22 C. Standard Filterra® Detail Drawings & Filterra Plan Notes Drawing FLP-2: Filterra® Typical Flowline Relationship 24 Drawing CGT-5: Filterra® Throat Opening & Gutter or Flume Detail. 25 Filterra® Standard Plan Notes 26 Drawing FTNL-4: Precast Filterra® Unit Narrow Length Configuration 28 Drawing FTST-2: Precast Filterra® Unit Standard Configuration 29 Drawing FTNW-4: Precast Filterra® Unit Narrow Width Configuration 30 Drawing FTlRR-3: Filterra® Irrigation Planning Layout 31 D, Filterra® Techinical Section Americast Filterra® Product Weights and Lifting Details 33 Drawing FTOPC-3: Filterra® Precast Box Wall at Outfall Pipe Connection 34 Filterra® Piping Technical Details 35 Drawing DPI: Filterra® Precast Box Wall at Outfall Pipe Connection 35 Table 3: Filterra® Flow Rates & Pipe Details 35 Filterra® Options: Recessed Tops 36 Filterra® Options: Ornamental Grates 37 Common Filterra® Placements 38 Filterra® Plant Selection 39 Filterra® Schematic 40 www.filterra.com Bioretention Systems Section A Essential Reading - Filterra Overview Important! Please remember to complete and send the Project Information Form (p.9) to Filterra® with plans for evaluation. This review is mandatory as proper placement ensures optimum performance and validates the product warranty. Toll Free: (866) 349-3458 Fax: (804) 798-8400 desiQ:n(a)filierra.coni www.filterra.com Filterra® Overview Bioretention Systems Stormwater Bioretention Filtration System Save valuable space with small footprint for urban sites Improve BMP aesthetics with attractive trees or shrubs Reduce hfetime cost with safer and less expensive maintenance Remove Pollutants and Comply with NPDES Fiherra® is well-suited for the ultra-urban environment with high removal efficiencies for many pollutants such as petroleum, heavy metals, phosphorus, nitrogen, TSS and bacteria. Filterra® is similar in concept to bioretention in its function and applications, with the major distinction that Filterra* has been optimized for high volume/flow treatment and high pollutant removal. It takes up little space (often 0.2% Filter Surface Area/Drainage Area) and may be used on highly developed sites such as landscaped areas, green space, parking lots and streetscapes. Fiherra* is exceedingly adaptable and is the urban solution for Low Impact Development. Stormwater flows through a specially designed filter media mixture contained in a landscaped concrete container. The filter media captures and immobilizes pollutants; those pollutants are then decomposed, volatilized and incorporated into the biomass of the Filterra* system's micro/macro fauna and flora. Stormwater runoff flows through the media and into an underdrain system at the bottom of the container, where the treated water is discharged. Higher flows bypass the Filterra* via a downstream inlet structure, curb cut or other appropriate relief Expected Average Pollutant Removal Rates (Ranges Varying with Particle Size, Pollutant Loading and Site Conditions) TSS Removal 85% Phosphorous Removal 60% - 70% Nitrogen Removal 43% Heavy Metal Removal 33% - 82% Predicted Oil & Grease > 85%, www.filterra.com iLlGrfd Design Guidelines for Using Filterra® Bioretention Systems 1. Do not place in a sump condition. The Filterra® cannot be used as a stand alone inlet - it will need effective bypass during higher intensity rainfall events. Plans MUST show Filterra® Top Curb (TC) and Flow Line (FL) spot elevations and also bypass TC (where applicable) and bypass FL spot elevations. The Filterra® TC and FL elevations MUST be higher than the bypass TC and FL elevations for effective bypass. Use Drawing FLP-2 (p.24) as a detail on the project plans. 2. For proper trash collection ensure a minimum 4" and maximum 6" Filterra® throat opening depth and use Drawing CGT-5 (p.25) as a detail on the project plans. 3. Do not direct surface flow to the Filterra® in a "head-on" configuration. Refer to Guidelines GUl-A (p. 12) and GU2 (p. 13) for grading design that encourages flow to enter a Filterra® in a cross linear flow - left-to-right or right to-left in the gutter in front of the throat, as per a wet curb which prevents system damage. During extreme storm events the excess flow should continue past the Filterra® to a bypass inlet or other means of relief. Guideline GU3, Parking Lot Comers, shows common situations (p-14). 4. To calculate which size Filterra® is required, use Table 1, Filterra® Quick Sizing Table, appropriate to the project's geographical region and target treatment regime (p. 11). The entire contributing drainage area to the Filterra® should be considered and the minimum allowable C factors noted. The maximum contributing drainage area will vary with site conditions. For fiirther information relating to sizing, please contact Filterra. 5. To ensure correct installation, include the Standard Filterra® Plan Notes (p.26-27) on your Filterra® detail project sheet, as well as detailed drawings FLP-2 and CGT-5 (p.24,25). 6. Positive drainage of each Filterra® unit's effluent treatment pipe is required to prevent free standing water from accumulating in the system or underdrain. This could occur due to tidal influences or improper connection of Filterra's effluent pipe to a bypass structure or other outfall. 7. Send plans and the completed Filterra® Project Information Form (p.9) to Americast for Filterra® placement review. Plan sheets should include grading, drainage areas, stormwater schedules or profiles, landscape sheets and Fiherra® detail sheets. THIS REVIEW IS MANDATORY for warranty to apply and helps ensure that each Filterra® system operates efficiently to maximize performance and minimize maintenance. Our staff also looks for value engineering opportunities. Methods of sending information for review: E-mail: design@filterra.com Mail or other: AutoCAD or PDF files Filterra Review Fax: (804) 798-8400 849 E. Stanley Blvd. #131 FTP Site: contact Fiherra® for details Livermore, CA 94550 www.filterra.com ilterfd Bioretention Systems Items Considered in Americast's Filterra® Plan Reviews Following is a summary list of the items Americast considers during plan review. Plan sheets should include grading, drainage areas, stormwater schedules or profiles, landscape sheets and Filterra® details. Notes • Filterra® Structure Label or Identification Number • Plarmed Filterra® Box Size • Filterra® Contributing Drainage Area (not the bypass inlet Drainage Area) • The C Factor for each individual Filterra® drainage area Checks The plaimed Filterra® box size meets project's regional sizing specification Spot elevations (Top Curb & Flow Line) for Filterra® and bypass (TC & FL) The Filterra® spot elevations (TC & FL) are higher than bypass spot elevations The grading design encourages cross linear flow and not head-on flow Filterra® invert elevations are shown (3.5' below TC) Filterra® effluent treatment pipe invert elevations are higher than bypass structure or other out fall invert elevations The Filterra® outlet drain pipe is sized correctly The outlet drain pipe exits perpendicular to the Filterra® wall For any conflicting structures such as storm drain pipes below Filterra® For most efficient placement of Filterra® tmits Plans include Filterra® details listed below: FLP-2: Filterra® Typical Flow Line and Outlet Pipe Relationship CGT-5: Filterra® Throat Opening and Gutter or Flume Detail Filterra® Standard Plan Notes ( 2 pages ) www.filterra.com PLEASE PRINT AND FAX OR EMAIL THIS FORM 3/09-V04- WZ Filterra® Project Information Form (.Complete & send to Americast hy email, fax or mail Acklress: 849 E.Stanley Blvd. ii 131 Livermore. CA 94550 Toll Free: (866) 349-.VI58 Fax: (804)798-8400 Email: design(^^filterra,com Project Information froject Name/'Niimber: Regiilalon Municipality and State (City, Coimty, etc.): Target Treatment Rate: Engineering Contact Information bngineermg l-irm: Contact: Email: Cunent Dale: ^hone: Fax: filterra Bioretention Systems Filterra® Details (Email, mail or fax plans to Americast - Acceptable formats are AutoCAD or pdf) Plans sheets should include (1) cover. (2) grading, (3) drainage areas, (4) stormwater schedules or profile, (5) landscaping & (6) Filterra® details. Filterra Structure # Filterra Size (ID fl) Throat L x W Filterra Drainage Area Acres Runoff Coefficient C Factor Filterra Spot Elevation TC Ft, INV OtIT Bypa,ss Spot Elevation TC FE Bypass or Effluent INV IN Modified Structure Y/N? Grate or lop Options Y/N? TC = Top Curb . Ft, = Flow Line FEP Detail on plans (Y/N) CGT Detail on plans (Y/N) FT Plan Notes shown (Y/N) Filterra® Project Process Flowchart - Design to Maintenance Yes - - Engineer Incorporates Filterra* in Project Design Engineer Sends Plans & Filterra® Project Information Sheet to Americast for Review Completed Filterra® Project Information Sheet Filterra* Sizing and Placement Guidelines from Americast Project Site & Grading Plan Yes Engineer Completes Project Site Design —• Americast Reviews Site Plan & Filterra* Project Infomiation Sheet Americast Sends Comments on Filterra® Placement and Application Americast Sends Comments on Filterra® Placement and Application Engineer Revises Project Site Design Engineer Submits Plans to Goveming Jurisdiction for Approval Approved by Goveming >—Yes- Jurisdiction/ Final Approved Project Plans Project Goes Out to Bid Project is Awarded Design Phase Construction Phase Maintenance Phase Bold items indicate services provided by Americast. 01/04/05 10 Bioretention Systems Table 1: Filterra® Quick Sizing Table (Western Zone - 0.2 in/hr Uniform Intensity Aporoach) Available Filterra® Box Sizes (feet) Recommended Commercial Contributing Drainage Area (acres) where C = 0.85 Outlet Pipe 4x4 up to 0.22 4" SDR-35 PVC 4x6.5 or 6.5x4 0.23 to 0.35 4" SDR-35 PVC 4x8 or 8x4 0.36 to 0.44 4" SDR-35 PVC Standard 6x6 0.45 to 0.49 4" SDR-35 PVC 6x8 or 8x6 0.50 to 0.65 4" SDR-35 PVC 6x10 or 10x6 0.66 to 0.82 6" SDR-35 PVC 6x12 or 12x6 0.83 to 0.98 6" SDR-35 PVC Available Filterra® Box Sizes (feet) Recommended Residential Contributing Drainage Area (acres) where C = 0.50 Outlet Pipe 4x4 up to 0.37 4" SDR-35 PVC 4x6.5 or 6.5x4 0.38 to 0.60 4" SDR-35 PVC 4x8 or 8x4 0.61 to 0.74 4" SDR-35 PVC Standard 6x6 0.75 to 0.83 4" SDR-35 PVC 6x8 or 8x6 0.84 to 1.11 4" SDR-35 PVC 6x10 or 10x6 1.12 to 1.39 6" SDR-35 PVC 6x12 or 12x6 1.40 to 1.67 6" SDR-35 PVC Notes: 1. All boxes are a standard 3.5 feet depth (INV to TC) 2. A standard SDR-35 PVC pipe coupling is cast into the wall for easy connection to discharge drain 3. Dimensions shown are internal. Please add 1' to each external (using 6" walls) 4. In line with TR55 data, for Commercial Developments a minimum (runoff coefficient) C factor of 0.85 is recommended. For Residential Developments, use of C factors less than 0.5 require individual site review by Filterra. 5. Please ask for Sizing Tables for other target treatment goals, e.g. 0.3 in/hr 6. This sizing table is valid only for CA, NV, AZ, OR, ID, AK & HI 3/] 7/08 www.filterra.com 11 GRADING AND GUTTER FLOW CURB (TYP) GUTTER FLOW TO BYPASS GUTTER FLOW FROM CONTRIBUTING DRAINAGE AREA GUTTER FLOW GRADING AND CURB AND GUTTER SHOULD BE SUCH THAT GUTTER FLOW APPROACHES THE FILTERRA FROM ONE SIDE OF THE THROAT AND FLOWS AWAY FROM THE FILTERRA ON THE OPPOSITE SIDE DURING EXTREME STORM EVENTS. DESIGN OR INSTALLATION SUCH THAT FLOW APPROACHES FROM BOTH SIDES WILL RESULT IN SITE MAINTENANCE ISSUES AND VOID MANUFACTURER'S MAINTENANCE PROGRAM AND WARRANTY. INCORRECT MODIFICATIONS OF DRAWINGS ARE ONLY PERMITTED BY WRIHEN AUTHORIZATION FROM FILTERRA CORRECT Copyright C 2007 by Americas! OATE: 03-03-05 DWG. GUl-A FILTERRA® GUIDEUNES GRADING AND GUTTER FLOW us PAT 6.277.274 AND 6,569.321 12 AVOID "HEAD-ON" GUTTER FLOW PROBLEM FLOW FROM THE ADJACENT GUTTER HITS THE FILTERRA "HEAD-ON". THIS CAN CAUSE SYSTEM DAMAGE (MEDIA EROSION OR SUSPENSION). REGARDLESS OF WHETHER BYPASS IS PROVIDED THIS IS A PROBLEM SCENARIO. GUTTER FLOW SHOULD APPROACH THE FILTERRA PARALLEL TO THE THROAT SO THAT WATER FLOWS IN A LINEAR PATTERN IN FRONT OF THE THROAT. DURING EXTREME STORM EVENTS, EXCESS WATER SHOULD CONTINUE TO FLOW IN FRONT OF THE FILTERRA TO A BYPASS INLET OR OTHER RELIEF. POSSIBLE SOLUTIONS MODIFICATIONS OF DRAWINGS ARE ONLY PERMITTED BY WRITTEN AUTHORIZATION FROM FILTERRA Copyrighl © 2007 by Americasl DATE: 12-22-04 DWG: GU2 FILTERRA® GUIDELINES AVOID "HEAD-ON" GUTTTER FLOW us PAT 6.277.274 ANO 6.569.321 13 PARKING LOT CORNERS PROBLEM PROBLEM MODIFICATIONS OF DRAWINGS ARE ONLY PERMIHED BY WRIHEN AUTHORIZATION FROM FILTERRA POSSIBLE PLACEMENT SOLUTIONS Copyright © 2007 by Americast DATE: 12-14-04 DWG: GU3 FILTERRA® GUIDELINES PARKING LOT CORNERS us PAT 6.277.274 AND 6.569.321 14 Bioretention Systems Section B Filterra® Plans, Placement & Grading Scenario Ideas to Ensure Maximum Efficiency & Minimum Space Used Toll Free: (866) 349-3458 Fax: (804) 798-8400 de s i'.infi i ifi 11 erra. com www.filterra.com 15 LOW POINT LOW POINT J c LOW POINTS AT 2 SIDES FILTERRA CURB INLET -.^[^ FILTERRA FILTERRA L" CURB INLET FILTERRA LOW POINT LOW POINT /g— LOW POINT LOW POINT FILTERRA ^ CURB INLET FILTERRA J ( T [) FILTERRA CURB INLET FILTERRA LOW POINTS AT 4 CORNERS ARROWS INDICATE DIRECTION OF SURFACE DRAINAGE FLOW LOW LOW MODIFICATIONS OF DRAWINGS ARE ONLY PERMITTED BY WRITTEN AUTHORIZATION FROM FILTERRA J c FILTERRA CURB INLET e\ FILTERRA FILTERRA CURB INLET FILTERRA LOW POINTS AT 2 CORNERS Copyright O 2007 by Americast DATE: 01-03-05 DWG: PLG1 FILTERRA® EXAMPLE SCENARIOS TYPICAL PARKING LOT APPLICATIONS us PAT 6.277.274 AND 6.569.321 16 TO BYPASS RELIEF LOWER ELEVATION CURB CUT PAVED AREA CONCRETE OR PAVED FLUME \ HIGHER ELEVATION • CURB CUT PARKING LOT ISLAND THROAT CURB (TYP) PAVED Vi. AREA ON-GRADE ISLAND IN OPEN PARKING LOT PAVED AREA CURB (TYP) CURB CUT PARKING LOT ISLAND o CURB CUT PAVED AREA FILTERRA UNIT CURB INLET (LOW POINT) CONCRETE OR PAVED FLUME 7 FILTERRA UNIT LOW POINT ISLAND AT SIDE OF PARKING LOT MODIFICATIONS OF DRAWINGS ARE ONLY PERMITTED BY WRITTEN AUTHORIZATION FROM FILTERRA FLUME (SLOPED TOWARD FILTERRA THROAT) CAST-IN-PLACE FLUME & GUnER GUTTER TRANSITION TO PROVIDE POSITIVE DRAINAGE TO THROAT OPENING SECTION VIEW OF FILTERRA THROAT AND FLUME PAVED TO AREA BYPASS RELIEF FILTERRA UNIT PARKING LOT ISLAND FLOW CURB CUT PAVED AREA CURB _/ (TYP) THROAT CONCRETE OR PAVED FLUME ON-GRADE ISLAND AT SIDE OF PARKING LOT Copyright O 2007 by Americas! DATE: 01-03-05 DWG: PLG2 FILTERRA® EXAMPLE SCENARIOS PARKING LOT ISLAND APPLICATIONS • m US PAT 6.277.274 ANO 6.569.321 17 FLUME (CROWNED AND SLOPED TOWARD FILTERRA THROATS) PAVED AREA CROWNED CONCRETE OR PAVED FLUME FLOW PRECAST FILTERRA TOP SLAB (TYP) s FLO CURB (TYP) ^ FILTERRA UNIT DOWEL (TYP) SECTION VIEW OF CROWNED FLUME FLUME (SLOPED TOWARD FILTERRA THROAT) CROWNED FLUME CORNER CAST-IN-PLACE FLUME & GUTTER GUTTER TRANSITION TO PROVIDE POSITIVE DRAINAGE TO THROAT OPENING THROAT CONCRETE OR PAVED FLUME SECTION VIEW OF FILTERRA THROAT AND FLUME LOW POINT PAVED AREA THROAT CONCRETE OR PAVED FLUME TWO FLUME CORNER FILTERRA UNIT O CURB <i. (TYP) THROAT CONCRETE OR PAVED FLUME LOW POINT STORM DRAIN INLET ONE FLUME CORNER DATE: 01-03-05 DWG: PLG3 FILTERRA® EXAMPLE SCENARIOS PARKING LOT CORNER APPLICATIONS US PAT 6.277,274 AND 6.569.321 18 FILTERRA FLOW RATES THROAT OPENING FINISHED GRADE FILTERRA PERFORATED PIPING INCLUDED FOR INFILTRATION CM < I 1^ . LU > o 'fMTTMnl:T;i=TrMiriLirMT TOP OF INFILTRATION CELL(S) TO BE AT A LOWER ELEVATION THAN FILTERRA INVERT OUT PERFORATED PIPING WITHIN THE LIMITS OF THE INFILTRATION CELL SECTION VIEW GUTTER FLOW THROUGH FILTERRA THROAT OPENING TREE GRATE CURB (BY OTHERS) PLAN VIEW INFILTRATION CELL BENEATH FILTERRA MODIFICATIONS OF DRAWINGS ARE ONLY PERMinED BY WRITTEN AUTHORIZATION FROM FILTERRA FILTERRA SIZE (FEET) EXPECTED FLOW RATE (CFS) CONNECTING DRAINAGE PIPE 4X6.5 OR 6.5X4 0.061 4" SDR-35 PVC 4X8 OR 8X4 0.075 4- SDR-35 PVC 6X6 0.084 4" SDR-35 PVC 6X8 OR 8X6 0.112 4" SDR-35 PVC 6X10 OR 10X6 0.140 6" SDR-35 PVC 6X12 OR 12X6 0.168 6" SDR-35 PVC INFILTRATION CLEANOUT (BY OTHERS) INFILTRATION CELL (BY OTHERS) SDR-35 PVC COUPLING PRECAST INTO BOX WALL BY AMERICAST (OUTLET PIPE LOCATION VARIES) UNDERDRAIN & CLEANOUT (BY OTHERS) INFILTRATION CELL (BY OTHERS) HYDROMODIFICATION TECHNIQUES (BY OTHERS) PERFORATED PIPE OVERSIZED SOLID PIPE CONSTRUCTED INFILTRATION GALLERY MANUFACTURED INFILTRATION GALLERY BELOW GROUND VAULT DRAWING AVAILABLE IN TIF FILE FORMAT Copyright 2007 by .Americast DATE: 05-07-08 DWG: FTHYD-1 TYPICAL FILTERRA® HYDROMODIFICATION CONFIGURATION us PAT 6.277.2 AND 6.569.32 ISOMETRIC VIEW FILTERRA CONCRETE CURB (TYP) (BY OTHERS) OUTLET PIPE (BY OTHERS) TO APPROPRIATE OUTFALL FLOWLINE OF SWALE SLOPED DOWN TO A AN APPROPRIATE BYPASS AT A LOWER ELEVATION THAN ELEV 'A' CONCRETE SWALE AND TRANSITION AT FILTERRA (BY OTHERS) PLAN VIEW CAST IN PLACE GUTTER TRANSITION (BY OTHERS) CAST IN PLACE CONCRETE SWALE (BY OTHERS) MIN 4"/MAX 6" THROAT OPENING CAST IN PLACE CONCRETE GUHER AT THROAT OPENING (BY OTHERS) SECTION VIEW AT FILTERRA FLOWLINE OF SWALE ON EITHER SIDE OF FILTERRA DRAWING AVAILABLE IN TIF FILE FORMAT mmoetmii Copyii^t O 2005 by Americast DATE: 03-10-05 DWG: FTSWL-1 PRECAST FILTERRA® UNIT TYPICAL SWALE CONFIGURATION us PAT 6.277,274 AND 6.569.321 I CL Error: Out of Metnory Installation Manual vOI •f.::'.<»».-;t-'i' Bioretention Systems;, A Growing Idea in Stormwater Filtration':: (866) 349-3458 (804) 798-8400 design(afilterra.com www.filterra.corTi Support Fax E-mail Web Filterra® Stormwater Bioretention Filtration System Copyright ® 2008 by Filterra Bioretention Systenns, a division of Americast Bioretention Systems Table of Contents Filterra® Overview 3 A. Installation Installation Guidelines for Filterra 5 Installation Procedure 7 Drawing FLP-2: Filterra® Typical Flowline Relationship...* 11 Drawing CGT-5: Filterra® Throat Opening & Gutter or Flume Detail 12 B. Curb and Gutter Standard Curb and Gutter with Inlet Bypass 14 Curb Gut or Grate Inlet Bypass 16 Single Sided Flume 18 Double Sided Flume... 20 Weight Charts Weights and Lifting Details - Eastem Zone 22 Weights and Lifting Details - Westem Zone 23 Filterra® Schematic 24 www.filterra.com Filterra® Overview Stormwater Bioretention Filtration System terra Bioretention Systems Save valuable space with small footprint for urban sites Improve BMP aesthetics with attractive trees or shrubs Reduce lifetime cost with safer and less expensive maintenance Remove Pollutants and Comply with NPDES The Filterra® Bioretention System is well-suited for the urban environment with high removal efficiencies for many pollutants such as petroleum, heavy metals, phosphorus, nitrogen, and TSS. Filterra is similar in concept to bioretention in its function and applications, with the major distinction that Filterra has been optimized for high volume/flow treatment and high pollutant removal. Filterra takes up little space (often 0.2% Filter Surface Area/Drainage Area) and may be used on highly developed sites such as landscaped areas, green spaces, parking lots and streetscapes; it is exceedingly adaptable and is the urban solution for Low Impact Development. Stormwater runoff flows through a specially designed filter media mixture contained in a landscaped concrete container. The filter media captures and immobilizes pollutants; those pollutants are then decomposed, volatilized and incorporated into the biomass of the Filterra system's micro/macro fauna and flora. Once the stormwater runoff flows through the media it continues into an underdrain system at the bottom of the container, where the treated water is discharged. Higher flows bypass the Filterra via a downstream inlet structure, curb cut or other appropriate relief. www.filterra.com Section A Installation Installation Guidelines Installation Procedure Drawing FLP-2 Drawing CGT-5 Toll Free: (866) 349-3458 Fax: (804) 798-8400 desi!in((a)filter,ra.com i [terra Bioretention Systems www.filterra.com Installation Guidelines for Filterra® Bioretention Systems Delivery & Unloading/Lifting 1. Filterra shall deliver the Filterra units to the site in coordination with the Contractor. 2. The Contractor will require spreader bars and chains/cables to safely and securely lift all box pieces and most ofthe top lids. Filterra will supply a set of suitable lifting hooks, shackles and eye bolts with each project at no extra charge. 3. The unit and top must be lifted separately. Please see Filterra Weights and Lifting Details on p. 22 - 23. Contact Filterra for non-standard Filterra unit lifting details. Inspection 1. Inspection of the Filterra unit and all parts contained in or shipped outside of the unit shall be inspected at time of delivery by the site Engineer/Inspector and the Contractor. Any nonconformance to approved drawings or damage to any part of the system shall be documented on the Filterra shipping ticket. Damage to the unit during and after unloading shall be corrected at the expense ofthe Contractor. Any necessary repairs to the Filterra unit shall be made to the acceptance of the Engineer/Inspector. Site Preparation 1. The Contractor is responsible for providing adequate and complete site/inlet protection when the Filterra unit is installed prior to final site stabilization (full landscaping, grass cover, final paving, and street sweeping completed) 2. The Contractor shall adhere to all jurisdictional and/or OSHA safety mles in providing temporary shoring of the excavation. 3. The Contractor or Owner is responsible for appropriately barricading the Filterra irom traffic (in accordance with local codes). www.filterra.com Bioretention Systems Installation Guidelines for Filterra® Installation 1. Do not place in a sump condition. The Filterra® cannot be used as a stand alone inlet, it will need effective bypass during higher intensity rainfall events. Refer to Drawing FLP-2 Grading & Gutter Flow. To test a proposed location, imagine the Filterra throat is completely blocked (so it would act like a typical curb and gutter). If this results in any ponding or pooling of drainage, the placement is inappropriate. If the drainage continues to flow by the blocked Filterra throat to the bypass inlet (or other relief) without any ponding or pooling, the placement is appropriate. 2. Each unit shall be constmcted at the locations and elevations according to the sizes shown on the approved drawings. Any modifications to the elevation or location shall be at the direction of and approved by the Engineer. 3. The unit shall be placed on the compacted sub-grade with a minimum 6-inch gravel base matching the final grade ofthe curb line in the area of the unit. The unit is to be placed such that the unit and top slab match the grade of the curb in the area of the unit. Compact undisturbed sub-grade materials to 95% of maximum density at +1% to 2% ofthe optimum moisture. Unsuitable material below sub-grade shall be replaced to site engineer's approval. Please see Filterra Weights and Lifting Details on p. 22 and 23. Contact Filterra for guidance where slope exceeds 5%. 4. Once the unit is set, the intemal wooden forms and protective silt fabric cover must be left intact. The top lid should be sealed onto the box section before backfilling, using a non-shrink grout, butyl mbber or similar waterproof seal. The boards on the top of the lid and boards sealed in the unit's throat must NOT be removed. The Supplier will remove these sections at the time of activation. 5. Outlet connections shall be aligned and sealed to meet the approved drawings with modifications necessary to meet site conditions and local regulations. The correct outlet will be marked on the Filterra box. Do NOT use plugged couplings marked "USE OTHER CONNECTION". 6. Backfilling should be performed in a careful manner, bringing the appropriate fill material up in 6" lifts on all sides. Precast sections shall be set in a manner that will result in a watertight joint. In all instances, installation of the Filterra unit shall conform to ASTM specification C891 "Standard Practice for Installation of Underground Precast Utility Stmctures" unless specified otherwise in contract documents. 7. It is the responsibility of the Contractor to provide curb and gutter and transition to the Filterra unit for proper stormwater flow into the system through the throat opening. A standard drawing of the throat and gutter detail (Drawing CGT-5) is available on page 12, however the plans and contract documents supersede all standard drawings. Flume variations are detailed in Section B of this manual. Effective bypass for the Filterra system is essential for correct operation (i.e. bypass to an overflow at lower elevation.) www.filterra.com Installation Procedure 1 [terra Bioretention Systems DO NOT remove protective boards or tree grates from the top slab. Remove the shipping dunnage along the top of box wall. DO NOT remove wooden intemal bracing or protective silt fabric. DO NOT remove the protective throat board. Curb and gutter details are provided on the protective throat board. w»'>v.fillerra.com Bioretention Systems A set of lifting hooks, shackles and eye bolts are provided by Filterra with the first delivery of every project. The contractor MUST provide all rigging and lifting apparatus, such as all cables and chains or straps. The unit and top slab MUST be lifted separately. At this time you can remove the boards between the box and top. It is the contractor's responsibility to provide suitable lifting equipment to offload the Filterra unit. Filterra units are designed to be offloaded using the contractor's spreader bar. 1. Unload Or Remove Top From Unit Unload the top slab and set it on the ground. www.filterra.com Bioretention Systems 2. Unload And Set Box Unload the Filterra box and set into the pre- prepared hole with appropriate sub-grade.* * Compacted sub-grade with a minimum of six inches of gravel base which must match the final grade of curb line the area of the unit. 3. Apply Butyl Tape Seal Apply butyl tape seal along the top of the box section. Butyl tape seal is provided with every unit. Filterra installed protective throat board and installed silt fabric must be left in place to protect the unit from constmction sediment. 4. Set TOP On Box Set the top slab on the box. The Contractor is responsible for providing adequate and complete site/inlet protection when the Filterra unit is installed prior to final site stabilization (full landscaping, grass cover, final paving, and street sweeping completed). www.filterra.com Bioretention Systems 5. Connect Outfall Pipe The correct outlet will be marked on the Filterra box. DO NOT use plugged couplings marked "USE OTHER CONNECTION". 6. Install Curb & Gutter It is the responsibility of the Contractor to provide curb and gutter and transition to the Filterra unit for proper flow into the system through a 4"- 6" throat opening. A standard drawing ofthe throat and gutter detail (Drawing CGT-4) is on page 12. 7. Activation Activation is performed ONLY by Filterra persormel. Activation can occur once the project site is fully stabilized (full landscaping, grass cover, final paving and street sweeping completed) and there is a 4" - 6" throat opening. Call 866-349-3458 to schedule your activation. www.filterra.com FILTERRA STANDARD CURB AND GUHER (TYP) GUTTER FLOW DEPRESSED GUHER AT THROAT OPENING (TYP) FILTERRA FLOWLINE ELEV A' ELEVATION VIEW BYPASS CURB INLET FLOWLINE ELEV 'B' INTERLOCKING JOINT (TYP) FILTERRA UNIT STORMWATER STRUCTURE OUTLET PIPE (BY OTHERS) CONNECT TO STORM DRAIN PERFORATED UNDERDRAIN SYSTEM BY AMERICAST EFFLUENT INVERT OUT STORMWATER STRUCTURE EFFLUENT IN (MUST BE LOWER) CROSS SECTION MODIFICATIONS OF DRAWINGS ARE ONLY PERMIHED BY WRITTEN AUTHORIZATION FROM FILTERRA ^^sS' Copyright ©2007 by Americasl DATE: 07-07-06 DWG: FLP-2 FILTERRA® TYPICAL FLOWLINE AND OULET PIPE RELATIONSHIP ' irrs us PAT 6.277.274 ANO 6.569.321 www.filterra.com CROWNED FLUME PRECAST FILTERRA TOP SLAB (TYP) FLUME - SLOPED TOWARDS FILTERRA THROAT 4-6 OPENING CAST-IN-PLACE FLUME & GUTTER (CROWNED AND SLOPED TOWARD FILTERRA THROATS) DOWEL (TYP) CAST-IN-PLACE FLUME & GUTTER (SLOPED TOWARD FILTERRA THROAT) PRECAST FILTERRA BOX WALL CURB SECTIONS VIEWS OF FILTERRA IN TYPICAL FLUME APPLICATIONS SEE BELOW FOR DETAILS NOT SHOWN STANDARD 90* NOSING (OTHER NOSING AVAILABLE UPON REOUEST) PRECAST TOP SLAB CAST-IN-PUCE DEPRESSED GUTTER AND THROAT OPENING (BY CONTRACTOR) §4 DOWEL BARS @ 12" O.C. BY AMERICAST TO BE BENT AS NECESSARY BY CONTRACTOR PRIOR TO INSTALLATION OF FIELD POURED GUTTER PRECAST BOX WALL THROAT PROTECTION DEVICE DO NOT REMOVE - LEAVE IN PLACE UNTIL SITE IS STABILIZED AND FILTERRA IS ACTIVATED SECTION VIEW STANDARD FILTERRA THROAT OPENING IMPORTANT FILTERRA FLOV\/LINE MUST BE AT A HIGHER ELEVATION THAN BYPASS FLOWLINE (DROP INLET OR OTHER) MODIFICATIONS OF DRAWINGS ARE ONLY PERMITTED BY WRITTEN AUTHORIZATION FROM FILTERRA DRAWING AVAILABLE IN TIFF FILE FORMAT, Copyright C 2007 by Amcricist DATE: 02-26-09 DWG: CGT-5 FILTERRA® THROAT OPENING AND GUTTER OR FLUME DETAIL US PAT 6.277.274 AND 6.569,321 www.filterra.com i [terra Bioretention Systems Section B Curb and Gutter Standard Curb and Gutter with Inlet Bypass Curb Cut or Grate Inlet Bypass Single Sided Flume Double Sided Flume Toll Free: (866) 349-3458 Fax: (804) 798-8400 desi mirrt ifil lerra .com www.filterra.com Standard Curb and Gutter with inlet bypass Bioretention Systems ELEV A' MUST BE HIGHER THAN ELEV 'B' SLOPE GUTTER FLOW DEPRESSED GUTTER AT THROAT OPENING (TYP) IMPORTANT FILTERRA FLOWLINE MUST BE AT A HIGHER ELEVATION THAN BYPASS FLOWLINE (DROP INLET OR OTHER) CURB INLET THROAT GUTTER FLOW 'FILTERRA FLOWLINE ELEV A' ELEVATION VIEW BYPASS CURB INLET FLOWLINE ELEV •B' www.filterra.com Bioretention Systems FILTERRA CURB INLET CLLLUlJft LLLLLLp \D-1-I-1-Q' CLLLUlJft LLLLLLp \D-1-I-1-Q' STANDARD CURB AND GUTTER (TYP) TRANSITION FROM STANDARD TO DEPRESSED GUTTER (TYP) ELEV 'A' MUST BE HIGHER THAN ELEV 'B' PIJ\N VIEW CAST-IN-PLACE: CURB AND GUTTER ON EH'HER SIDE OF. FILTERRA (BY CONTRACTOR) PRECAST TOP SLAB CAST-IN-PU^CE DEPRESSED GUTTER AT THROAT OPENIN' (BY CONTRACTOR) TRANSITION TO DEPRESSED GUTTER AT THROAT OPENING #4 DOWEL BARS O 12" O.C. BY AMERICAST TO BE BENT AS NECESSARY BY CONTRACTOl PRIOR TO INSTALLATION OF FIELD POURED GUTTER PRECAST BOX WALL 4" MIN / 6" MAX CLEAR THROAT OPENING THROAT PROTECTION DEVICE DO NOT REMOVE - LEAVE N PLACE UNnL SnE IS STABILIZED AND FILTERRA IS ACTIVATED SECTION VIEW FILTERRA THROAT OPENING IMPORTANT FILTERRA FLOWLINE MUST BE AT A HIGHER ELEVATION THAN BYPASS FLOWLINE (DROP INLET OR OTHER) me/mm DATE: 11-15-05 DWG: CGC01-A FILTERRA® THROAT OPENING AND TYPICAL FLOWLINE RELATIONSHIP FOR REQUIRED EFFECTIVE BYPASS us PAT 6,277.274 AND 6,569.321 www.filterra.com Curb cut or grate inlet bypass Bioretention Systems Filterra flowline must be higher ttian bypass flowline ELEV A- MUST BE HIGHER THAN ELEV 'B' IMPORTANT FILTERRA FLOWLINE MUST BE AT A HIGHER ELEVATION THAN BYPASS FLOWLINE (DROP INLET OR OTHER) STANDARD CURB AND GUTTER (TYP) TRANSITION FROM STANDARD TO DEPRESSED GUTTER (TYP) SLOPE GUTTER FLOW DEPRESSED GUTTER AT THROAT OPENING (TYP) GUTTER FLOW FILTERRA FLOWLINE ELEV A' ELEVATION VIEW FLOWLINE OF BYPASS (E.G. CURB CUT. GRATE INLET, DRAINAGE DITCH, OR OTHER FORM OF LOWER ELEVATION BYPASS RELIEF) FLOWLINE ELEV www.filterra.com i [terra Bioretention Systems FILTERRA ELEV 'A' MUST BE HIGHER THAN ELEV 'B' STANDARD CURB AND GUTTER (TYP) FILTERRA FLOWLINE ELEV 'A' CURB CUT, GRATE INLET, DRAINAGE DITCH, OR OTHER FORM OF LOWER ELEVATION BYPASS RELIEF TRANSITION FROM STANDARD TO DEPRESSED GUTTER (TYP) PLAN VIEW CAST-IN-PLACE CURB AND GUTTER ON EITHER SIDE OF- FILTERRA (BY CONTRACTOR) PRECAST TOP SLAB CAST-IN-PLACE DEPRESSED GUTTER AT THROAT OPENINi (BY CONTRACTOR) TRANSITION TO DEPRESSED GUTTER AT THROAT OPENING |4 DOWEL BARS © 12" O.C. BY AMERICAST TO BE BENT AS NECESSARY BY CONTRACTOl PRIOR TO INSTALLATION OF FIELD POURED GUTTER MIN / 6" MAX CLEAR THROAT OPENING THROAT PROTECTION DEVICE DO NOT REMOVE - LEAVE N PLACE UNTIL SITE IS STABIUZED AND FILTERRA IS ACTIVATED PRECAST BOX WALL- SECTION VIEW FILTERRA THROAT OPENING IMPORTANT FILTERRA FLOWLINE MUST BE AT A HIGHER ELEVATION THAN BYPASS FLOWLINE (DROP INLET OR OTHER) www.filterra.com Single sided flume Lt Bioretention Systems ELEV 'A' MUST BE HIGHER THAN ELEV 'B' TOP OF -CURB SLOPE BOTTOM OF FACE OF CURB DEPRESSED GUTTER AT THROAT OPENING (TYP) FILTERRA FLOWLINE ELEV A' ELEVATION VIEW IMPORTANT FILTERRA FLOWLINE MUST BE AT A HIGHER ELEVATION THAN BYPASS FLOWLINE (DROP INLET OR OTHER) TOP OF -CURB GRATE INLET BYPASS GRATE INLET FLOWLINE ELEV B' ON GRATE www.filterra.com Bioretention Systems IMPORTANT FILTERRA FLOWLINE MUST BE AT A HIGHER ELEVATION THAN BYPASS FLOWLINE (DROP INLET OR OTHER) CURB (TYP) ILTERRA UNIT 4" OR 6"(» PIPE FROM FILTERRA TO STORM DRAIN STORM DRAIN GRATE UTFALL PIPE FROM STORM DRAIN GRATE ONCRETE OR PAVED FLUME .OW POINT PLAN VIEW ELEV 'A- MUST BE HIGHER THAN ELEV 'B' CAST-IN-PLACE CURB AND GUHER ON EITHER SIDE OF FILTERRA (BY CONTRACTOR) PRECAST TOP SLAB CAST-IN-PLACE DEPRESSED GUnER AT THROAT OPENINi (BY CONTRACTOR) TRANSITION TO DEPRESSED, GUTTER AT THROAT OPENING jSl4 DOWEL BARS O 12" O.C. BY AMERICAST TO BE BENT AS NECESSARY BY CONTRACTOR PRIOR TO INSTALLATION OF FIELD POURED GUHER PRECAST BOX WALL FLUME SECTION VIEW FILTERRA THROAT OPENING 4" MIN / 6" MAX \/CLEAR THROAT OPENING THROAT PROTECTION DEVICE DO NOT REMOVE - LEAVE N PLACE UNTIL SITE IS STABILIZED AND FILTERRA IS ACTIVATED IMPORTANT FILTERRA FLOWLINE MUST BE AT A HIGHER ELEVATION THAN BYPASS FLOWLINE (DROP INLET OR OTHER) www.filterra.com Double sided flume luierra Bioretention Systems ELEV 'A' MUST BE HIGHER THAN ELEV B' TOP OF -CURB SLOPE BOTTOM OF FACE OF CURB DEPRESSED GUTTER AT THROAT OPENING (TYP) FILTERRA FLOWLINE ELEV A' ELEVATION VIEW IMPORTANT FILTERRA FLOWLINE MUST BE AT A HIGHER ELEVATION THAN BYPASS FLOWLINE (DROP INLET OR OTHER) TOP OF "CURB GRATE INLET BYPASS GRATE INLET FLOWLINE ELEV B' ON GRATE www.filterra.com i [terra Bioretention Systems •ILTERRA UNIT CURB (TYP 4 OR 6 0 PIPE FROM FILTERRA TO STORM DRAIN STORM DRAIN GRATE UTFALL PIPE FROM STORM DRAIN GRATE CONCRETE OR PAVED FLUME (CROWNED AND SLOPED TOWARDS FILTERRA) OW POINT 4" OR 6"0 PIPE FROM FILTERRA TO STORM DRAIN FILTERRA UNIT PU\N VIEW TYPICAL FLUME CROWNED AND SLOPED TOWARDS FILTERRA THROAT PRECAST FILTERRA TOP SLAB (TYP) FLUME (CROWNED AND SLOPED TOWARD FILTERRA THROATS) FILTERRA THROAT OPENING (TYP) PRECAST FILTERRA BOX WALL (TYP) SECTION VIEW FILTERRA THROAT OPENINGS MIN MAX DOWEL (TYP) IMPORTANT FILTERRA FLOWLINE MUST BE AT A HIGHER ELEVATION THAN BYPASS FLOWLINE (DROP INLET OR OTHER) www.filterra.com Filterra® Weights and Lifting Details Eastern Zone Bioretention Systems 4'-0" Throat 4x6 4x8 4x12 6'-0" Throat 6x4 Std 6x6 6x8 6x10 6x12 7-0" Throat 7x13 8'-0" Throat 8x4 8x6 10'-0" Throat 10x6 12'-0" Throat 12x4 12x6 13'-0" Throat 13x7 Top Only Box + Media *Spreader Bar Pounds Tons Pounds Tons Min Max 2,819 3,829 5,231 1.41 1.91 2.62 12,607 16,035 22,889 6.30 8.02 11.44 5.00 ft 5.00 ft 5.00 ft 7.50 ft 7.50 ft 7.50 ft 3,417 4,221 5,121 6,545 6,825 1.71 2.11 2.56 3.27 3.41 12,452 17,051 21.649 26,248 30,847 6.23 8.53 10.82 13.12 15.42 5.50 ft 7.00 ft 7.00 ft 7.00 ft 7.00 ft 7.50 ft 9.00 ft 9.00 ft 9.00 ft 9.00 ft 10,106 5.05 37,185 18.59 8.00 ft 10.00 ft 3,787 5,100 1.89 2.55 15,725 21,494 7.86 10.75 5.50 ft 7.50 ft 7.50 fl 9.50 ft 6,503 3.25 25,938 12.97 7.50 ft 9.50 ft 5,146 6,762 2.57 3.38 22,269 30,382 11.13 15.19 5.50 ft 7.50 ft 7.50 ft 9.50 ft 10,042 5.02 37,185 18.59 8.50 ft 10.50 ft * BOX AND TOP MUST BE LIFTED SEPARATELY * A 7.50 ft spreader bar is suitable for all sized sliown and is always needed for safe lifting of all box sizes. www.filterra.com Filterra® Weights and Lifting Details Western Zone Bioretention Systems 4'-0" Throat 4x4 4x6.5 4x8 4.5x8.5 6'-0" Throat 6.5x4 Std 6x6 6x8 6x10 6x12 8'.0" Throat 8x4 8.5x4.5 8x6 iO'-O" Throat 10x6 12'-0" Throat 12x6 Top Only Pounds Tons 1,808 0.90 3,178 1.59 3,829 1.91 4,562 2.28 3,151 1.58 4,221 2.11 5,121 2.56 6,545 3.27 6,997 3.50 3,787 1.89 4,519 2.26 5,100 2.55 6,503 3.25 6,933 3.47 Box + Media Pounds Tons 9,180 13,994 16,035 18,368 4.59 7.00 8.02 9.18 13,784 17,051 21,649 26,248 31,702 6.89 8.53 10.82 13.12 15.85 15,725 18,058 21,494 7.86 9.03 10.75 25,938 12.97 31,199 15.60 'Spreader Bar Min Max 5.00 ft 5.08 ft 5.00 fl 5.50 ft 7.50 fl 7.58 ft 7.50 fl 7.50 fl 5.58 ft 7.00 ft 7.00 fl 7.00 ft 7.08 fl 7.58 ft 9.00 ft 9.00 fl 9.00 fl 9.08 fl 5.50 ft 6.00 ft 7.50 ft 7.50 fl 8.00 fl 9.50 fl 7.50 ft 9.50 ft 7.58 ft 9.58 ft * BOX AND TOP MUST BE LIFTED SEPARATELY ' A 7.50 fl spreader bar is suitable for all sized shown and is always needed for safe lifting of all box sizes. www.filterra.com Bioretention Plant/Soil/Mlcrobe Complex Removes Pollutants, TSS, Phosphorus, Nitrogen, Bacteria, Heavy Metals, Hydrocarbons, etc Bioretfintioii Sv New or Existing Catch Basin, Curb Cut or