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CT 12-06; Vista La Costa Condominiums; Tentative Map (CT) (2)
I I I I I I I I I I 1- 1 I I I I I I I STORM WATER MANAGEMENT PLAN SWMP 12-11 For Vista La Costa SDP 12-01 Revised: September 12, 2012 Revised: August 7, 2012 May29, 2012 JN 12-1004 Prepared For: SJ Assets Management, Inc. In care of Diversified Development, Inc 7668 El Camino Real Carlsbad, CA 92009 Ste. 104-280 Prepared By: O'DAY CONSULTANTS 2710 Loker Avenue West, Suite 100 Carlsbad, CA 9201 0 11~~ Nichole Fine C 70035 Exp. 9/30/12 G:\031 060\Drainage\Final\SWMPR.doc 1 RECE\VED OEC 0 6 20\2 C\TY OF CARLSBAD PLANNU\lG 0\V\S\ON 1..----1 -~-------- 1 I I I I I I I I I I I I I I I I I TABLE OF CONTENTS TABLE OF CONTENTS ................................................................................. 2 1. PROJECT SETTING ........................................................................... 4 2. APPLICABLE STORMW ATER STANDARDS ............................... 5 2a. Storm Water Standards Questionnaire ........................................... 5 2b. HMP Applicability Determination ................................................. 5 3. IDENTIFY POLLUTANTS OF CONCERN ..................................... 5 3a. Identify pollutants associated with type ofproject/use .................. 5 3b. Identify watershed, hydrologic unit basin and receiving waters .... 5 3d. Beneficial uses of receiving water ................................................. 6 3e. Summarize primary pollutants of concern ..................................... ? 4. SOURCE CONTROL MEASURES ................................................... ? 4a. Description of site activities and potential sources of pollutants ... 7 4b. Stormwater Pollutant Sources and Source Controls ...................... ? 5. LOW IMPACT DEVELOPMENT (LID) DESIGN STRATEGIES ... ? 5a. Optimization of site layout.. ........................................................... 7 5b. Layout and use of pervious surfaces .............................................. 8 5c. Dispersal of runoff from impervious areas to pervious areas ........ 8 6. INTEGRATED MANAGEMENT PRACTICES (IMP's) .................. 8 6a. Selection process for IMP's ........................................................... 8 6b. Sizing factors for IMP's ................................................................. 8 6c. Geotechnical recommendation on soil infiltration rates ................ 9 6d. Infiltration calculations .................................................................. 9 7. TREATMENT CONTROL BMP's ..................................................... 9 8. HYDROMODIFICA TION .................................................................. 9 9. DOCUMENTATION OF STORMWATER DESIGN ...................... IO 9a. Hydrologymaps ........................................................................... IO 9b. BMP Sizing Calculator ................................................................ 1 0 9c. Tabulation .................................................................................... 1 0 10. BMP FACILITY MAINTENANCE REQUIREMENTS .................. 10 1 Oa. Ownership and responsibility of maintenance of BMP's ............ 1 0 1 Ob. Summary of maintenance requiremenmts ................................... 11 11. SWMP CERTIFICATION STATEMENTS ...................................... 13 G:\031060\Drainage\Final\SWMPR.doc 2 I I I I I I I I I I I I I I I I I I I Attachments: 1. Vicinity map 2. Storm Water Standards Questionnaire 3. Figure 2-1 HMP Applicability Determination 4. Table 2-1: Anticipated and Potential Pollutants 5. San Diego Region Hydrologic Boundary Map 6. 303(d) list for impaired water bodies 7. Table 2-3 Beneficial Uses of Coastal Waters 8. Stormwater Pollutant Sources and Source Control Checklist 9. Figure 2-2 Decision Matrix 10. BMP exhibit 11. BMP Calculator Output and Bioretention Calculations 12. Trench Drain Filter Specifications and Installation Guidelines G:\031 060\Drainage\Final\SWMPR.doc 3 I I I I I I I I I I I I I I I I I I I 1. PROJECT SETTING This Storm Water Management Plan was prepared to support the application for construction plans ofVista La Costa, a 19-unit apartment project located in Parcel2 of Certificate of Compliance Document 84-325375. See Attachment 1 for Vicinity Map. Storm water run-off from the site is tributary to the Batiquitos Lagoon. Vista La Costa is a 0.88 acre site located 1.5 miles east of El Camino Real, north of Gibraltar Street in between Jerez Court and Romeria Street in the City of Carlsbad. A Drainage Study for Vista La Costa, dated May 29, 2012 was prepared by O'Day Consultants and will be referred to hereon as Reference 1. The existing site is mass graded per Grading Plans La Costa South, Unit No.5, County of San Diego Dwg. L-5548 (Reference 2). Existing Conditions Currently, the site is mass-graded per Reference 2. The upper pad is at about elevation 61.0 and the lower pad is at elevation 55.5. On the northerly edge of the site a slope, steeper than 2:1, daylights into the La Costa Golf Course and Spa to the north. The site drains at 0.5% towards Gibraltar Street, to a curb inlet located on the southeast side of the site. The storm water then drains to a 48" RCP pipe, that runs along the easterly boundary of the site. The storm water outlets to the north, to a PCC lined drainage swale in the La Costa Golf Course and ultimately outlets to the Batiquitos Lagoon. Proposed Conditions 19 Multi-Family residential units are proposed for Vista La Costa: two main buildings, and a parking lot. A private driveway will be constructed between the two buildings and lead into underground parking garages. The drive aisle and the parking lot will be constructed of pervious pavement or pavers. The roof will drain to various bioretention areas located at the southwest and north sides of the site. Each bioretention area will have an underground detention facility to limit the outflow for hydromodification. The trench drain at the bottom of Private Drive 'A' will pick-up water from the driveway and will connect to the private storm drain system. See Reference 1 for the 100 year drainage calculations and drainage map. See Attachment 10 for the BMP exhibit depicting drainage areas to each BMP. The site is constrained by Type 'D' Soil. A 4" perforated drain surrounded by gravel will be used in the bioretention areas. G:\031 060\Drainage\Final\SWMPR.doc 4 I I I I II I I I I I I I I I I I I I I 2. 2a. APPLICABLE STORMWATER STANDARDS Storm Water Standards Questionnaire Vista La Costa JN 121004 Per the Storm Water Standards Questionnaire (SWSQ), this project meets PRIORITY DEVELOPMENT PROJECT (PDP) requirements and must comply with additional stormwater criteria per the SUSMP. (See Attachment 2 for completed SWSQ) 2b. HMP Applicability Determination Per Figure 2-1 of the SUSMP, Hydromodification controls are required. (See Attachment 3 for Figure 2-1 HMP Applicability Determination.) It was determined that field investigations would not be conducted pursuant to the SCCWRP channel screening tools. Therefore the site must mitigate peak flows and durations based on a pre-project condition lower flow threshold of 0.1Q2. 3. IDENTIFY POLLUTANTS OF CONCERN 3a. Identify pollutants associated with type of project/use Per Table 2-1 of the SUSMP (see Attachment 4), the pollutants anticipated for : attached residential development and parking lots are listed as follows: 1. Sediments 2. Nutrients 3. Heavy metals 4. Trash and debris 5. Potential for oxygen demanding substances 6. Oil and grease from paved areas 7. Potential for bacteria and viruses 8. Pesticides from landscaping 3b. Identify watershed, hydrologic unit basin and receiving waters The project is located in the Batiquitos Hydrologic Subarea (904.51) of the San Marcos Watershed in the Carlsbad Hydrologic Unit in the San Diego Region (Attachment 5). G:\031 060\Drainage\Final\SWMPR.doc 5 I I I I I I I I I I I I I I I I I I I Vista La Costa JN 121004 The San Diego Water Board adopted the 2008 Clean Water Act Sections 305 (b) and 303 (d) Integrated Report on Evaluation of Surface Water Quality and Listing of Impaired Water Body Segments for the San Diego Region (2008 Integrated Report) on December 16, 2009. The final 2008 Integrated Report was incorporated into the statewide 2010 Integrated Report that was approved by the State Water Board on August 4, 2010. On November 12, 2010, USEPA approved the 2008-2010 CWA Section 303 (d) List that includes listings for the San Diego Region. According to the 2008-2010 CWA Section 303 (d) List, Batiquitos Lagoon is not an impaired water body associated with the direct stormwater discharge from this project . It should be noted that the Pacific Ocean Shoreline at Moonlight State Beach (Cottonwood Creek Outlet) is listed for impairment of total coliform. (See Attachment 6) 3d. Beneficial uses of receiving water The beneficial uses for the hydrologic unit are included in Attachment 7, and the definitions are listed below. This information comes from the Water Quality Control Plan for the San Diego Basin. REC 1 -Contract Recreation: Includes uses of water for recreational activities involving body contact with water, where ingestion of water is reasonably possible. These uses include, but are not limited to, swimming, wading, water-skiing, skin and SCUBA diving, surfing, white water activities, fishing, or use of natural hot springs. REC 2 -Non-Contact Recreation: Includes the uses of water for recreational activities involving proximity to water, but not normally involving body contact with water, where ingestion of water is reasonably possible. These include, but are not limited to, picnicking, sunbathing, hiking, beachcombing, camping, boating, tide pool and marine life study, hunting, sightseeing, or aesthetic enjoyment in conjunction with the above activities. BIOL-Preservation of Areas of Special Biological Significance EST -Estuarine Habitat: Includes the uses of water that support estuarine ecosystems including, but not limited to, preservation or enhancement of estuarine habitats, vegetation, fish, or wildlife (e.g., estuarine mammals, waterfowl, shorebirds). WILD -Wildlife Habitat: Includes uses of water that support terrestrial ecosystems including but not limited to, preservation and enhancement of terrestrial habitats, vegetation, wildlife, (e.g., mammals, birds, reptiles, amphibians, invertebrates), or wildlife water food and sources. RARE-Rare, Threatened, or Endangered Species: Includes uses of water that support habitats necessary, at least in part, for the survival and successful maintenance of plant or animal species established under state or federal law as rare, threatened or endangered. MAR -Marine Habitat: Includes uses of water that support marine ecosystems including, but not limited to, preservation or enhancement or marine habitats, vegetation such as kelp, fish, shellfish, or wildlife (e.g., marine mammals, shorebirds). MIGR -Migration of Aquatic Organisms: Includes uses of water that support habitats necessary for migration, acclimatization between fresh and salt water, or other temporary activities by aquatic organisms, such as anadromous fish. G:\031 060\Drainage\Final\SWMPR.doc 6 I I I I 'I I I I I I I I I I I I I I I Vista La Costa JN 121004 SPWN-Spawning, Reproduction, and/or Early Development-Includes uses of water that support high quality aquatic habitats suitable for reproduction and early development of fish. This use is applicable only for the protection of anadromous fish. 3e. Summarize primary pollutants of concern The primary pollutants of concern for this project are Sediment, Nutrients, Trash & Debris, Oxygen Demanding Substances, Oil & Grease, Bacteria & Viruses, and Pesticides. The extensive use ofbioretention facilities throughout the site should be a highly effective method of treating Coarse Sediment and Trash, and Pollutants that tend to associate with fine particles during treatment. Bioretention facilities also show medium effectiveness for treatment of Pollutants that tend to be dissolved following treatment. 4. SOURCE CONTROL MEASURES 4a. Description of site activities and potential sources of pollutants Potential sources of pollutants on the project site include: 4b. Building Roofs On-site storm drain inlets Landscape/Outdoor Pesticide Use Sidewalks Stormwater Pollutant Sources and Source Controls See attachment 8 for Stormwater Pollutant Sources and Source Control Checklist 5. Sa. LOW IMPACT DEVELOPMENT (LID) DESIGN STRATEGIES Optimization of site layout 1) Minimize Building Layout-By designing 3~story buildings with underground parking, the amount of impervious surface is reduced by K 2) Existing Soil-Due to the nature of the existing soil, it will need to be overexcavated for the building and driveway per geotechnical reccomendations. 3) Driveway-Width of driveway is limited to the minimum as required by the City of Carlsbad Fire Department, 24.0 feet wide. 4) Conserve Natural Areas-Not applicable, because the existing site has been mass- graded. G:\031 060\Drainage\Final\SWMPR.doc 7 I I I I I I I II I I I I I I I I I I I 5b. Layout and use of pervious surfaces Vista La Costa JN 121004 Permeable pavers or pavement will be used along the drive aisle and sidewalks, as well as the parking lot. 5c. Dispersal of runoff from impervious areas to pervious areas The roof water for Building 1 on the west side of the site will be conveyed to vegetated swales prior to entering the bioretention facilities (IMPs). The roof water for Building 2 will be conveyed to a combination of vegetated swales and private storm drain system prior to entering the bioretention facility (IMP). 6. INTEGRATED MANAGEMENT PRACTICES (IMP's) 6a. Selection process for IMP's According to Table 2-2 of the SUSMP, The majority of pollutants of concern for this project can be grouped in the category of Pollutants that tend to associate with fine particles during treatment. Nutrients also fall under the category of Pollutants that tend to be dissolved following treatment and Trash & Debris falls under the category of Coarse Sediment and Trash. According to Table 2-3, Infiltration Facilities provide the highest effectiveness for removal of pollutants in all three categories but our site is constrained by impermeable soils. Bioretention Facilities were chosen extensively throughout the site for their high removal rates for Coarse Sediment and Trash and Pollutants that tend to associate with fine particles during treatment and their medium removal rates for Pollutants that tend to be dissolved following treatment. Bioretention facilities detain stormwater and filter it slowly through soil or sand and are versatile in that they can be any shape and can be landscaped. The bioretention areas onsite were sized to treat stormwater as well as limit flow control for hydromodification. 6b. Sizing factors for IMP's 1) Lower flow threshold determination Field investigations were not conducted pursuant to SCCWRP screening tools. Therefore, the site must mitigate peak flows and durations based on a pre-project condition lower flow threshold of 0.1 Q2. G:\031 060\Drainage\Final\SWMPR.doc 8 I I I I I I I I I I I I I I I I I I I I 2) HMP Decision Matrix Vista La Costa JN 121004 IMP facilities were sized using the Decisio1;1 Matrices in Figures 2~2. See Attachment 9. 6c. Geotechnical recommendation on soil infdtration rates Infiltration rates for Type 'D' soil are low, an underdrain will be utilized in bioretention areas. It is assumed the geotechni<;:al engineer will recommend a liner around gravel surrounding perforated pipe and bioretention area. See Attachment 10 for BMP exhibit and bioretention section. 6d. Infdtration calculations Infiltration rates within the bioretention areas for the 18" soil/compost layer shall be 5 inlhr and shall be verified by the geotechnical engineer at the time of construction. Infiltration into native soil will not be used at this site. 7. TREATMENT CONTROL BMP's Bioretention areas were sized for both treatment and hydromodification. See Attachment 10 for DMA map and Attachment 11 for calculations from the BMP Sizing Calculator from Brown and Caldwell. Due to the site constraints a trench drain filter will be utilized for treatment at the bottom of the pervious pavement driveway. It is virtually impossible to drain storm water from the underground parking garage (the bottom of the driveway) to the bioretention facilities located several feet above that elevation. The trench drain filter, with BioMedia Green, by BioClean Environmental Services is considered a media filter with a high performance removal rate of pollutants. The specifications in Attachment 12 depict removal rates on the order of 70%-90%. 8. HYDROMODIFICATION Bioretention areas were sized for both treatment and hydromodification. To meet the hydromodification criteria set forth in the County of San Diego Final HMP Plan, dated March 2011, the bioretention & vault facilities were sized to meet the lower flow threshold of 0.1 Q2 See Attachment 10 for DMA map and Attachment 11 for calculations from the BMP Sizing Calculator from Brown and Caldwell. The BMP Calculator utilizes numeric sizing factors, based on a 5 inlhr infiltration rate of the soil compost media. G:\031 060\Drainage\Final\SWMPR.doc 9 ,------------------ I I I I I I I I I I I I I I I I I I I 9. 9a. DOCUMENTATION OF STORMWATER DESIGN Hydrology maps Vista La Costa JN 121004 Attachment 10 depicts the 1) Proposed Impervious Surface 2) Pervious Pavement and Landscaping proposed on Site and 3) the Self-Treating Areas and 4) The drainage area for each bioretention facility. 9b. BMP Sizing Calculator Output from the BMP Sizing Calculator is included in Attachment 11. 9c. Tabulation See Table in Attachment 11 10. BMP FACILITY MAINTENANCE REQUIREMENTS lOa. Ownership and responsibility of maintenance of BMP's The Owner will be responsible for the maintenance of treatment facilities. Ongoing maintenance will be assured by executing a Permanent Stormwater Quality BMP Maintenance Agreement that "runs with the land." Owner: Coastal Living, LLC. 814 S. Westgate Ave. #125, Los Angeles, CA 90049 Phone: 1-310-826-1518 Developer: S.J. Asset Management, Inc. in care of Diversified Development 7668 El Camino Real Ste 104-280 Carlsbad, CA 92010 Contact: Brian Merritt (951) 691-0544 G:\031 060\Drainage\Final\SWMPR.doc 10 I I I I I I I I I I I I I I I I I I I lOb. Summary of maintenance requiremenmts Bioretention Facilities Vista La Costa JN 121004 Bioretention facilities remove pollutants primarily by filtering runoff slowly through aerobic, biologically active soil. Routine maintenance is needed to ensure that flow is unobstructed, that erosion is prevented, and that soils are held together by plant roots and are biologically active. Typical maintenance consists of the following: • Inspect inlets for channels, exposure of soils, or other evidence of erosion. Clear any obstructions and remove any accumulation of sediment. Examine rock or other material used as a splash pad and replenish if necessary. • Inspect outlets for erosion or plugging. • Inspect side slopes for evidence of instability or erosion and correct as necessary. • After each rain event, observe the surface ofbioretention facility soil for uniform percolation throughout. If portions of the bioretention facility do not drain within 24 hours after the end of a storm, the soil should be tilled and replanted. The orifice outlet should be checked for blockage. Remove any debris or accumulations of sediment. • Confirm that check dams and flow spreaders are in place and level and that rivulets and channelization are effectively prevented. • Examine the vegetation twice a year 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. When mowing, remove no more than 1/3 height of grasses. 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. • Abate any potential vectors by filling holes in the ground in and around the bioretention 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 for information and advice. Mosquito larvicides should be applied only when absolutely necessary and then only by a licensed individual or contractor. G:\031 060\Drainage\Final\SWMPR.doc II -----------------------------------~~~---~~-~-- I I I I I I I I I I I I I I I I I I I Pervious Pavement Vista La Costa JN 121004 • Maintenance of pervious concrete pavement consists primarily of prevention of clogging of the void structure. Soil, rock, leaves, and other debris may infiltrate the voids and hinder the flow of water, decreasing the utility of the pavement. • Vacuuming annually or more often may be necessary to remove debris from the surface of the pavements. Other cleaning options may include power blowing and pressure washing. Bio Clean Trench Filter • Bio Clean Environmental Services Inc. recommends cleaning and debris removal maintenance a minimum of four times per year, and replacement of BioMediaGREEN a minimum of twice per year. • Following maintenance and/or inspection, the maintenance operator shall prepare a maintenance/inspection record. The record shall include any maintenance activities performed, amount and description of debris collected, and condition of filter. • The owner shall retain the maintenance/inspection record for a minimum of five years from the date of maintenance. These records shall be made available to the governing municipality for inspection upon request at any time. • For maintenance and cleaning remove grate to gain access to trench filter. Where possible the maintenance should be performed from the ground surface. • Remove all trash, debris, organics, and sediments collected by the inlet filter insert. • Evaluation of the filter media shall be performed at each cleaning. If the media is filled with pollutants and oils it should be replaced. • Transport all debris, trash, organics and sediments to approved facility for disposal in accordance with local and state requirements. • The BioMediaGreen filter media should be disposed of according to local and state requirements. Pool & Spa In the event that the pool and spa needs to be drained, the water may be pumped into the storm drain system, provided that the pool water has been de-chlorinated. De-chlorination of the pool water can be achieved by letting the water sit without adding additional chemicals. If, however, a new MS4 permit is in place that prohibits pool and spa water from entering the storm drain system, the water shall be drained according to the new permit regulations. G:\031 060\Drainage\Final\SWMPR.doc 12 I I I I I I I I I I I I I I I I I I I 11. SWMP CERTIFICATION STATEMENTS lla. Preparer's statement Vista La Costa JN 121004 The selection, sizing, and preliminary design of storm water treatment and other control measures in this plan meet the requirements of Regional Quality Control Board Order R9-2007-0001 and subsequent amendments. Nichole A. Fine, C70035, Exp. 9/30/12 Date 11 b. Owner's statement "I certify that, as owner of the property described herein, I have read and understand the requirements of this Storm Water Management Plan (SWMP) and that I am responsible for ensuring that all storm water treatment measures described within said SWMP will be properly implemented, monitored and maintained." The selection, sizing, and preliminary design of storm water treatment and other control measures in this plan meet the requirements of Regional Quality Control Board Order R9-2007-0001 and subsequent amendments. COastal Livmg, LLC. G:\031 060\Drainage\Final\SWMPR.doc 13 I I I I I I I I I I I I I I I I I I I CITY OF OCEANSIDE ?e ~;:.::::..::,;,---.,..--I '-~, .. --, ,p1 I I 1__"1 -- J I I _ .. w VICINITY MAP NO SCALE ATTACHMENT 1 I I I I I I I I I I I I I I I I I I I / /.~ '>\ .; ~"CITY OF CARLSBAD INSTRUCTIONS: STORM WATER STANDARDS QUESTIONNAIRE E-34 Development Services land Development Engineering 1635 Faraday Avenue 760-602-2750 www.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 of the 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 starl by completing Section 1 and follow the instructions. When completed, sign the form at the end and submit this with your application to the city. lSECTION1 NEW DEVELOPMENT Does your project meet one or more of the following criteria: YES NO 1. Housing subdivisions of 10 or more dwelling units. Examples: single family homes, multi-family homes, 'X condominium and apartments 2. Commercial-greater than 1-acre. Any development other 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 warehouses; automotive dealerships; airfields; and other light industrial facilities. 3. Heavy Industrial 1 Industry-greater than 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 .------------------------------- I I I I I I I I I I I I I I I I I I I 6. 7. 8. 9. /~~ ··> ¥/CITY 0 F CARLSBAD STORM WATER STANDARDS QUESTIONNAIRE E-34 Development Services Land Development Engineering 1635 Faraday Avenue 760-602-2750 www.carlsbadca.gov 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. Environmentally Sensitive Area fESAt All development located within or directly adjacenf to or discharging directly3 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. Parking lot. Area of 5,000 square feet or more, or with 15 or more parking spaces, and potentially exposed to urban runoff Streets, roads, highways, and freeways. 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. 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%. 12. More than 1-acre of disturbance. Project results in the disturbance of 1-acre or more of land and is considered a X Pollutant-generating Development Projed . .. . . 1 EnVIronmentally Sens1t1ve Areas 1nclude but are not llm1ted to all Clean Water Act Sect1on 303(d) 1mpa1red water bod1es, areas designated as Areas of Spec1al Biological Significance by the 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 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 within the Cities and County of San Diego; and any other equivalent environmentally sensitive areas which have been identified by the Copermittees. 2 "DirecHy 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 at 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 storm 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 I I I I I I I I I I I I I I I I I I I /'~. <.. .• /. '> ·~ CITY OF CARLSBAD STORM WATER STANDARDS QUESTIONNAIRE E-34 Development Services Land Development Engineering 1635 Faraday Avenue 760-602-2750 www .carlsbadca.gov I SECTION2 SIGNIFICANT REDEVELOPMENT 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 Project*? 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 requirements. 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, exposing underlying soil durino 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. 0 •• *for defm1tlon see Footnote 4 on page 2 SECTION3 QUESTIONNAIRE RESULTS 0 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 Information and Signature Box This Box for Cfty Use Only City Concurrence: I YES I NO I I By: Date: Date: ~ ~o/C-Project 10: E-34 Page 3 of 3 REV 1/14/11 I I I I I I I I I I I I I I I I I I I SECTION 2: IDENTIFY POLLUTANTS, BMP SIZING AND SELECTION uo 14. Hydromodificati<>n Controls R~d Go to Figure 2.2 of Decision Mlllrix FIGURE 2-1. HMP Applicability Determination* *refer to expanded lIMP exemption criteria below for justifications required on each node 30 City of Carlsbad SUSMP -January 14, 2011 -~-------------------------------------------------~ I I SECTION 2: IDENTIFY POLLUTANTS, BMP SIZING AND SELECTION I TABLE 2-1. ANTICIPATED AND POTENTIAL Pollutants Generat~'<l by Land Use Type I General Pollutant Categories I Trash Oxygen Bacteria Priority Project Heavy Organic & Demanding Oil& & Categories Sediment Nutrients Metals Compounds Debris Substances Grease Viruses Pesticides Detached I Residential X X X X X X X Development Attached I --t Residential X X X P(1) P(2) p X Development Commercial ' I Development 1'(1) 1'(1) X P(2) X 1'(5) X P(3) 1'(5) >one acre I f Ieavy Industry X X X X X X . I Automotive X X(4)(5) X X Repair Shops Restaurants X X X X 1'(1) I I Iillside Development X X X X X X >5,000 ft2 1--.!IJ Parking Lots 1'(1) P(1) X X 1'(1) X 1'(1) I Retail Gasoline X X X X X Outlets Streets, I llighways & X 1'(1) X X(4) X 1'(5) X X 1'(1) Freeways X = anticipated I P = potential (1) A potential pollutant if landscaping exists on-site. (2) A potential pollutant if the project includes uncovered parking areas. (3) A potential pollutant if land usc involves food or animal waste products. I (4) Including petroleum hydrocarbons. (5) Includingsolvcnts. I I 23 City of Carlsbad SUSMP -January 14, 2011 I 'I -----· -·····-----------·--·-·. S01.00 901.10 1.11 t.t2 1.13 ,. 901 20 1.21 REGION 9 INDEX SAN JUAN HYDROLOGIC UNIT L11gunao HA San Joaquin 1-li!ls HSA. legUf!B Sea~h HSA Aliso HSA Danill Point HSA Mission Viejo HA O:;;c HSA 1.22 Upper Trabuco HSA 1.23 Middle Trab11tD HSA 1.24 Gcbernadcra HSA 1 ,:;>S Upper San Juan HSA 908 00 908.10 908.20 8,21 821 908.30 831 8 32 --------------~ PUtBLO SAN DIEGO HYDROLOGIC UNil Point Lome HA San Diego Mesa HA. Llndhargh HSA Chllllas HSA M11tional Cltv HA EIToyan HSA P;uadise HSA. SWEETWATER HYDROLOGIC UNIT lower Sweetwat• HA TelPgraph liSA. I 1.26 Mtddle San Juan HSA 1.27 lower San Juan HSA • 't.-21" ·' i~ · · Orr~.a l-ISA 909.00 909.10 8.11 9.12 909.20 8.2\ 9.22 9.23 • 24 9.25 926 La Nadon HSA Middle S·.r.::-etwater HA. · Jam~cha HSA. Hillsdale HSA Dehesa HSA Gelloway HSA Sequan HSA .. 90U·,.J San Cl~rr~ente HA 1 .~1 Prima Deshecha Hs.A 1 32' • Segunda Ocshecha HSA 901AO S;tl'l Mal eo Can)'on HA 901.50 San Onolr11 HA U'·l San :)oolfe Valley HSA 1.62 las PLtlgas HSA 1 .r l Stuart HSA f-{12.00 ~2.10 2.1' •. l .o:.13 902.20 2.21 2.22 SANTA MARGARITA H'r"DROLOGlC UNIT YGidora HA L<;)Wer YsHIJri!l HSA Ch .. ppo HSA Uppar Ysidora HSA Oelu:r. HA Oeluz Cleek. HSA Gavll~•) 'i$-A ~-... ;:ito. :SA Murrieta :i I\ \'Vildomar HS... Muni~t.a HSA -.•. ~ .. -Fiiilch "''iA-· ---- ... 902.80 -e:d!;;iSt~ "· ··2.82. 2.83 2.84 902.90 .2.91 2.92 2.93 2.94 903.00 903.10 3.11 311 3.13 3.14 3.15 3.16 903.20 -::'1 322 ~~ _32~ .•.. 903 30 3.31 3.32 904.00 904.10 904 20 4.21 4.22 904.30 4.31 4.32 904.40 904.50 4.51 4.52 4.53 904.60 4.61 4.62 4.63 906.00 !'-guanga HA ~~ ·-. Devils.l-loi& f-ISA' .-.·--::--~~ Aetlec HSA Tule Creek HSA Oakgrove HA \.uHIII Culp ..;;;.. Pre11itt Canyon HSA Dodge HSA. Chihu;thua HSA SAN LUIS REV HYDROLOGIC UNIT lowar San luis HA M1ssion HSA &nsan HSA Moosa HSA Valley Ce.,tar HSA Woods HSA Rincon HSA ~~onser;rtl HA Peum3 HSA Le Jona A.mago HSA War~r Va!ley HA •• -': WarneJ HSA Combs. HSA CARLSBAD HYDAOL001C UNIT toma Ah.a HA Buenl VlStl Creek HA El Saito HSA Vista HSA Agua Hedlonda HA Los Monos HSA Buernll HSA Encinas HA -· San Marcos HA. Bati"uft05 HSA fticldand HSA Twin Oab HSA Esooncfdo Creek HA San EJijo HSA Escondido HSA Lat.:• Wohllord HSA SAN DIEOUJTO HYDROLOGIC UNIT 905.10 Solana Beach HA 5.11 Rancho Santi Fa HSA 5. 12 la Job HSA 905.20 Hodges HA 5.21 De\ Oios HSA 5.22 Grean HSA 5.23 Felicita HSA 80930 9.31 9.32 933 9.34 B.3& 910.00 910.1J 910.20 910.30 10.31 10.32 Alpine Heights HSA Upper Sweetwat&r HA loveland HSA Japatul HSA Vtejas HSA. Deseenso HSA Garnet HSA C'ITAY HYDROLOGIC UNIT Coronado HA Otay V;illey HA Oult.ura HA Savaga HSA P:roctor "-ISA . .. ..... .............. ·, ~.:!4 loa HSA t"'.:6 Lyon HSA .; "10::,4---Hallet'lbd HSA---- 10.:57 Er-.11ineer Spdngs HSA 91 I 00 TIJUANA HVDROLOGtC UN!T 911'0 T!juano~Vallf'yHA -1 1.11 S.ln Ys•d1o HSA 11.12 W;~terTar.i'.:tfSf, ,$11.20 Potrarc.l;iA ~ \121 --;· .• --·Marron.HSA · ---:::. ·~·\;:2t 7--~.:--a;.-c'anvoh HSA --:.-:."", .. : "U.23 Barrett HSA 11.24 Ftour.d Potrero HSA ,..... 1 i .~ ... -.--~ Lang Poueto.l-isA;.: • '=""' :·:et1.3D ·~': ·::-· sarriitt"Calie HA. • ., • · -:~ -•• \.... 911.40 Monume.nt HA .11.41 . Pme HSA 1 1.42 Mo;;nt Ltguna HSA ·-911.SO : :--Morena HA --::..911.-80 '-;~_Cottonwood HA _, . ..-.... i1iFg_,~t~~1/'AM.__..,. ~f .-~~u.S..~~~ ~11.81 ·-·-' ~recateHSA..- =cll·~~~~~~lf!'~~ .. rn.a3~i::lat'HSI>M . 11.84 • . • H~1 HSA • - 11.85 Hipass HSA NOT£: ..... ' Tb• nomP and ateall llbown on thra map arw the nme as used by ttl• Cepartmenr of WoW Re!!OUfC&a(.DWPJ In tfl•lr Su"elin fJD Serfu. .. Th• numberlniJ :~~ystem us&d on thla map la en edapt!on of !he numbarlnif system usttd ln tbe UO St:~rfes. Tbe 189! upda£lfl nemiiS •nd boundarf .. •hewn on ctre m•p arelll eccord1nc• with en agrumanf wtur DWR and US G*Oicglcef $utV•Y· f. The fSiilf revlJIOII o·r thJs map lnclud.i new~· . · ~ ~--..:.. t'*COQltl:.ed hydro(cglo •uba,...• wlthlll tJ•• · -· ...... Mle.slon 1/Te}o HA (IOU"). Horea f & Jl do nor epply to tflese subareu. . .--. . - -----&.24 --;--eear"HSA··------- 905.30 San Ps5-qual HA 6.31 Highl~ HSA 5.32 l11' Lomas Muann HSA 5.33 Reed HSA 5.34 tildden HSA 5.35 Guejlto HSA 5.36 Vlr~eyard HSA 905.40 Santa Maria Valley HA -5.41 ~amona HSA 5.42 towel H~tfleld HSA 5.43 wa~h licllow HSA fi 44 Upl"ffl Ha.tfietd liSA 6.4& BaHen.a HSA 6.46 East Santa Tares;, HSA 5.47 West Santa Teresa HSA 905.50 Santa Ysabel I-lA 5.51 Boden HSA 5 52 Pamu H!>A 5 53 Suthedand HSA 5.54 W1tch Creek HSA 906.00 906.10 9:16.20 906.30 906.40 -906 50 907 00 907.10 7.11 7.12 7.13 7.14 .1:?1:15." -§0?~2D. . 7.21 . 7.22 7.23 7.24 907.30 1.31 -·~ 7,32 ~1,i.3f ~07.40 7.41 7.42 7.43 PENASOUITOS HYDROLOGIC UNIT M~t~mar Reservoir liA Poway HA Scripps HA _ M1ramar HA Tecolotll liA SAN DIEGO HYDROLOGIC UNIT Lower San Diego HA Mission S01n Diego HSA Santee HSA • :· ;· Ei CajOn HSA • . Coclles HSA ~(~~tfi-1~}1; ,~ian.~~~~~~~ ·t.filr0brcok HSA :Kimball HSA GoWer HSA BaronB HSA 8Capttan HA Conejos Creek HSA Glen Oilk~ HSA . :G.-... • ~-~·-;..~ .J ~ ::•f\IP,;ne ~SA ~ ,--;. _.,.:.:<"";:~ &ulder Creek HA . · Inaja HSA SpencE!! HSA Cuyamaca HSA . . -: -- -. I • c• .. :· ... . ·" .. -----.!----------. -------" ·------------ ., : " ---- ------· .• -"'" - .... "". .." G E N D ' "!.. 'e:'"' .. J . Regional Boundary z <.,..:, - Hydrologic Unit Boundary (HLJ) Hydrologic Area Boundary (HA) Hydrologic Subarea Boundary (SA) ~ N ,, April 1973 Revised: Julr 191'6 Revised: Au guat I 986 /----~--------$tof,·Wajtr ReibUr"ifiJ Contra.l Boa.rcl- .:..·• ~ ... •, . ', ,I ,. 1 Survelllonce and Monliorlnt: St<:tlon T.E, Lavenda, P.E. Rulud: April 1995 Regional Woter Quo!IIJ Control Board'" S1111 Olego Water Cluol/ty Stoj'ldardl Unit O.F. liolrup Jr. ... ,, State of California ' ' ' Rtglon --·--·--·--------- •.. ; ;, .... _,:..; KEY TO REGION ,. REGIQ~,:AL WATER QUALITY CONTROL BOARD San Die Region (9) . . go SAN DIEGO HYDROLOGIC BASIN PLANNING AREA (SD) . ' . S c a I e 2 5o, 0 0 0 !li . " .. I 0 15 20Miles ·-: Solona ------·---.,---------· ·f· --·--·-------------------------,----_1 . . --"1l·-'· us ·-------·-------~ -------·'-~ -------....-~-----------------·-------------·-----. ' / . ..._ " _I ) \ - "" -, ' : . \\ -· ·-·---./·· -·--' ~ ' ·~· ----·------· '" .. "' ' .... .. . " " . -- - --------- ---- --- Appendix B All Decision 2008 1/27/2010 90113000 5 16946 2008 Do Not Delist from 303(d) list (TMDL required list) 90113000 2 16945 Revised Enterococcus 2008 Delist from 303(d) list (TMDL required list) 90113000 2 16944 Revised Fecal Coliform 2008 Delist from 303(d) list (TMDL required list) 90113000 2 16943 Revised 2008 Delist from 303(d) list (TMDL list) 5 17720 Original 2008 9 Ocean Shoreline, Batiquitos HSA, at from 303(d) list (TMDL Moonlight State Beach 5 17721 Original 2008 (Cottonwood Creek list) outlet) 9 Pacific Ocean Shoreline, Batiquitos HSA, at Not Delist from 303(d) list (TMDL Moonlight State Beach 5 17722 Original Total Coliform 2008 (Cottonwood Creek required list) Pacific Ocean Shoreline, Batiquitos HSA, at South 90451000 2 16742 Revised Enterococcus 2008 Do Not List on 303(d) list (TMDL Carlsbad State Beach required list) 90451000 2 16745 Revised Fecal Coliform 2008 Do Not List on 303(d) list (TMDL list) Ocean Shoreline, HSA, at South 90451000 2 16746 Revised Coliform 2008 State Beach Lagoon Outlet) 43 ------ --- - ------- -- Appendix B All Decision 2008 1/27/2010 2 16527 Revised Enterococcus 90451000 2 16526 Revised Fecal Coliform 2008 90451000 2 16525 Revised Total Coliform 2008 9 90421000 2 16959 Revised Enterococcus 2008 9 Ocean Shoreline, Vista Creek HA, at 90421000 2 16958 Revised Fecal Coliform 2008 Delist from 303(d) list (TMDL Buena Vista Lagoon required list) Outlet 9 Pacific Ocean Shoreline, Buena Vista Creek HA, at 90421000 2 16957 Revised Coliform 2008 Delist from 303(d) list (TMDL Buena Vista Lagoon required list) Outlet 9 Pacific Ocean Shoreline, Buena Vista Creek HA, at 90421000 2 16962 Revised Enterococcus 2008 Delist from 303(d) list (TMDL Carlsbad State Beach at list) Carlsbad Village 9 Pacific Ocean Shoreline, Buena Vista Creek HA, at 90421000 2 16961 Revised Coliform 2008 State Beach at Village 9 90421000 2 16960 Revised Total Coliform 2008 from 303(d) list (TMDL list) 9 Ocean Shoreline, Vista Creek HA, at 90421000 2 16965 Revised Enterococcus 2008 Delist from 303(d) list (TMDL State Beach at required list) 44 --------- -- - ------- Table 2-3. BENEFICIAL USES OF COASTAL WATERS BENEFICIAL USE Hydrologic R R c B w R A M s w s Unit Basin I N E E 0 I E I A M Q I p A H Coastal Waters N A s A E Number D v c c M 0 T L R R u G w R L 1 2 M L D E A R N M L Pacific Ocean • • • • • • • • • • • • • Dana Point Harbor • • • • • • • • • • • Del Mar Boat Basin • • • • • • • • • • • Mission Bay • • • • • • • • • • • Oceanside Harbor • • • • • • • • • • • San Diego Bay 1' 3 • • • • • • • • • • • • • Coastal Lagoons Tijuana River Estuary 11 . 11 • • • • • • • • • • • Mouth of San Diego River 7.11 • • • • • • • • • • Famosa Slough and Channel 7.11 • • • • • • • • • • Los Penasquitos Lagoon 2 6.10 • • • • • • • • • • San Dieguito Lagoon 5.11 • • • • • • • • • Batiquitos Lagoon 4.51 • • • • • • • • • San Elijo Lagoon 4.61 • • • • • • • • • Agua Hedionda Lagoon 4.31 • • • • • • • • • • • • • 1 Includes the tidal prisms of the Otay and Sweetwater Rivers. 2 Fishing from shore or boat permitted, but other water contact recreational (REC-1) uses are prohibited. 3 The Shelter Island Yacht Basin portion of San Diego Bay is designated as an impaired water body for dissolved copper pursuant to Clean Water Act section 303(d). A Total Maximum Daily Load (TMDL) has been adopted to address this impairment. See Chapter 3, Water Quality Objectives for Pesticides, Toxicity and Toxic Pollutants and Chapter 4, Total Maximum Daily Loads. • Existing Beneficial Use Table 2·3 BENEFICIAL USES 2. 52 ---- -- - --- --- - - - -- - Stormwater Pollutant Sources and Source Control Checklist How to Use this Checklist: 1. Review Column 1 and identify which of these potential sources of stormwater pollutants apply to your project. Check each box that applies. 2. Review Column 2 and incorporate all of the corresponding applicable BMPs in your SUSMP Drawings. 3. Review Columns 3 and 4 and incorporate all of the corresponding applicable permanent controls and operational BMPs in a table in your SUSMP Drawings. For PDP's, in your SWMP, use the format shown in Table 3-1. In the SWMP, describe your specific BMPs in an accompanying narrative, and explain any special conditions or situations that required omitting BMPs or substituting alternatives. IF THESE SOURCES WILL BE ON THE ... THEN YOUR PRO.JECT SHOULD INCLUDE THESE SOURCE CONTROL BMPs PRO.JECT SITE ... 1 2 3 4 Potential Sources of Permanent Controls-Show on Permanent Controls-List in SWMP Operational BMPs-lnclude in Runoff Pollutants SUSMP Drawings Table and Narrative SWMP Table and Narrative " A. On-site storm drain 5f Locations of inlets. $. Mark all inlets with the words "No sr Maintain and periodically repaint or inlets Dumping! Flows to Bay" or similar. replace inlet markings. s Provide stormwater pollution prevention information to new site owners, lessees, or operators. ~ See applicable operational BMPs in Fact Sheet SC-44, "Drainage System Maintenance," in the CASQA Stormwater Quality Handbooks at www.cabmphandbooks.com d 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." Page 1 of9 --- -- - - - -- - - - -- --- - [J B. Interior floor drains [J State that interior floor drains and [J Inspect and maintain drains to and elevator shaft sump elevator shaft sump pumps will be prevent blockages and overflow. pumps plumbed to sanitary sewer. ~ C. Interior parking ~ State that parking garage floor drains liT Inspect and maintain drains to garages will be plumbed to the sanitary sewer. prevent blockages and overflow. [J D1. Need for future [J Note building design features that [J Provide Integrated Pest Management indoor & structural pest discourage entry of pests. information to owners, lessees, and control operators. fi D2. Landscape/ [J Show locations of native trees or State that final landscape plans will Ia Maintain landscaping using Outdoor Pesticide Use areas of shrubs and ground cover to accomplish all of the following. minimum or no pesticides. be undisturbed and retained. sro~self-retaining landscape ~ Preserve existing native trees, shrubs, ~ See applicable operational BMPs in [J and ground cover to the maximum Fact Sheet SC-41, "Building and areas, if any. extent possible. Grounds Maintenance," in the [J l'l\t< Ia CASQA Stormwater Quality If a PDP, show stormwater Design landscaping to minimize Handbooks at treatment facilities. irrigation and runoff, to promote www.cabmphandbooks.com \'\ \p( surface infiltration where appropriate, !a and to minimize the use of fertilizers Provide IPM information to new and pesticides that can contribute to owners, lessees and operators. stormwater pollution. il 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. IZi To insure successful establishment, select plants appropriate to site soils, slopes, climate, sun, wind, rain, land use, air movement, ecological consistency, and plant interactions. ~ E. Pools, spas, ponds, [J Show location of water feature and [J If the local municipality requires pools r:i See applicable operational BMPs in decorative fountains, a sanitary sewer cleanout in an to be plumbed to the sanitary sewer, Fact Sheet SC-72, "Fountain and and other water accessible area within 10 feet. place a note on the plans and state in Pool Maintenance," in the CASQA features. the narrative that this connection will Stormwater Quality Handbooks at be made according to local www.cabmphangbooks.com requirements. Page2 of9 ------ - -- ----- - --- - [J F. Food service [J For restaurants, grocery stores, and [J Describe the location and features of [J other food service operations, show the designated cleaning area. location (indoors or in a covered area outdoors) of a floor sink or [J Describe the items to be cleaned in other area for cleaning floor mats, this facility and how it has been sized containers, and equipment. to insure that the largest items can be accommodated. [J On the drawing, show a note that this drain will be connected to a grease interceptor before discharging to the sanitary sewer. jl G. Refuse areas 6if Show where site refuse and ~ State how site refuse will be handled c;J ' State how the following will be recycled materials will be handled and provide supporting detail to what implemented: and stored for pickup. See city is shown on plans. f~-tf\ f~ standard drawing GS-16. Provide adequate number of ~ State that signs will be posted on or receptacles. Inspect receptacles If dumpsters or other receptacles near dumpsters with the words "Do regularly; repair or replace leaky [J are outdoors, show how the not dump hazardous materials here" receptacles. Keep receptacles designated area will be covered, or similar. covered. Prohibit/prevent dumping graded, and paved to prevent run-of liquid or hazardous wastes. Post on and show locations of berms to "no hazardous materials" signs. prevent runoff from the area. Inspect and pick up litter daily and rJ '(X' clean up spills immediately. Keep Any drams from dumpsters, spill control materials available on- [J compactors, and tallow bin area~ site. See Fact Sheet SC-34, "Waste shall be connected to a grease Handling and Disposal" in the removal device before discharge to CASQA Stormwater Quality sanitary sewer. Handbooks at "-"\Vw.cabmphandbQQks.com [J H. Industrial processes. [J Show process area. [J If industrial processes are to be [J See Fact Sheet SC-10, ''Non- located on site, state: "All process Stormwater Discharges" in the activities to be performed indoors. No CASQA Stormwater Quality processes to drain to exterior or to Handbooks at storm drain system." www .cabmph<!ndbook~.com Page 3 of9 -- - -- ------ --- - ---- 0 I. Outdoor storage of 0 Show any outdoor storage areas, 0 Include a detailed description of 0 See the Fact Sheets SC-31, "Outdoor equipment or materials. including how materials will be materials to be stored, storage areas, Liquid Container Storage" and SC- (See rows J and K for covered. Show how areas will be and structural features to prevent 33, "Outdoor Storage of Raw source control graded and bermed to prevent run-pollutants from entering storm drains. Materials " in the CASQA measures for vehicle on or run-off from area. Stormwater Quality Handbooks at cleaning, repair, and Where appropriate, reference www.cabml!handhook§.com maintenance.) 0 Storage of non-hazardous liquids documentation of compliance with the shall be covered by a roof and/ or requirements oflocal Hazardous drain to the sanitary sewer system, Materials Programs for: and be contained by berms, dikes, liners, or vaults. • Hazardous Waste Generation 0 Storage of hazardous materials and • Hazardous Materials Release wastes must be in compliance with Response and Inventory the local hazardous materials ordinance and a Hazardous • California Accidental Release Materials Management Plan for the (CalARP) site. • Aboveground Storage Tank • Uniform Fire Code Article 80 Section 103(b) & (c) 1991 • Underground Storage Tank Page4-of9 -- -- -- ---- -- ---- - -- [J J. Vehicle and [J Show on drawings as appropriate: [J If a car wash area is not provided, Describe operational measures to Equipment Cleaning describe measures taken to discourage implement the following (if (1) Commercial/industrial facilities on-site car washing and explain how applicable): having vehicle /equipment these will be enforced. cleaning needs shall either provide [J Washwater from vehicle and a covered, bermed area for washing equipment washing operations shall activities or discourage not be discharged to the storm drain vehicle/ equipment washing by system. removing hose bibs and installing [J signs prohibiting such uses. Car dealerships and similar may rinse cars with water only. (2) Multi-dwelling complexes shall [J have a paved, bermed, and covered See Fact Sheet SC-21, ''Vehicle and car wash area (unless car washing Equipment Cleaning," in the CASQA is prohibited on-site and hoses are Stormwater Quality Handbooks at provided with an automatic shut-www.cabmnhandbooks.com off to discourage such use). (3) Washing areas for cars, vehicles, and equipment shall be paved, designed to prevent run-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. Page 5 of9 - - -- -- - ---- ---- - - -- [J K. Vehicle/Equipment [J Accommodate all vehicle [J State that no vehicle repair or In the SUSMP report, note that all of Repair and equipment repair and maintenance maintenance will be done outdoors, or the following restrictions apply to use Maintenance indoors. Or designate an outdoor else describe the required features of the site: work area and design the area to the outdoor work area. prevent run-on and runoff of [J No person shall dispose of, nor stormwater. [J State that there are no floor drains or if permit the disposal, directly or there are floor drains, note the agency indirecdy of vehicle fluids, hazardous [J Show secondary containment for from which an industrial waste materials, or rinsewater from parts exterior work areas where motor discharge permit will be obtained and cleaning into storm drains. oil, brake fluid, gasoline, diesel that the design meets that agency's fuel, radiator fluid, acid-containing requirements. No vehicle fluid removal shall be batteries or other hazardous performed outside a building, nor on materials or hazardous wastes are [J State that there are no tanks, [J asphalt or ground surfaces, whether used or stored. Drains shall not be containers or sinks to be used for parts inside or outside a building, except installed within the secondary cleaning or rinsing or, if there are, note in such a manner as to ensure that containment areas. the agency from which an industrial any spilled fluid will be in an area of waste discharge permit will be secondary containment. Leaking [J Add a note on the plans that states obtained and that the design meets vehicle fluids shall be contained or either (1) there are no floor drains, that agency's requirements. drained from the vehicle or (2) floor drains are connected to immediately. wastewater pretreatment systems prior to discharge to the sanitary No person shall leave unattended sewer and an industrial waste drip parts or other open containers discharge permit will be obtained. [J containing vehicle fluid, unless such containers are in use or in an area of secondary containment. Page 6of9 -- - - -- --- - -- -- - --- [J L. Fuel Dispensing [J Fueling areas1 shall have [J The property owner shall dey sweep Areas impermeable floors (i.e., portland the fueling area routinely. cement concrete or equivalent smooth impervious surface) that [J See the Business Guide Sheet, are: a) graded at the minimum "Automotive Service-Service slope necessary to prevent ponding; Stations" in the CASQA Stonnwater and b) separated from the rest of Quality Handbooks at the site by a grade break that www.cabmphandbooks.com prevents run-on of stonnwater to the maximum extent practicable. Fueling areas shall be covered by a [J canopy that extends a minimum of ten feet in each direction from each pump. [Alternative: 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 area1.] The canopy [or cover] shall not drain onto the fueling area. t The fueling area shall be defined as the area extending a minimum of 6.5 feet from the comer of each fuel dispenser or the length at which the hose and nozzle assembly may be operated plus a minimum of one foot, whichever is greater. Page 7 of9 - -- - -- ------ --- - ---- Cl M. Loading Docks Cl Show a preliminary design for the Cl Move loaded and unloaded items loading dock area, including indoors as soon as possible. roofing and drainage. Loading Cl docks shall be covered and/ or See Fact Sheet SC-30, "Outdoor graded to minimize run-on to and Loading and Unloading," in the runoff from the loading area. Roof CASQA Stormwater Quality downspouts shall be positioned to Handbooks at direct stormwater away from the www.cabmnhandbooks.com loading area. Water from loading dock areas should be drained to the sanitary sewer where feasible. Direct connections to storm drains from depressed loading docks are prohibited. Cl Loading dock areas draining directly to the sanitary sewer shall be equipped with a spill control valve or equivalent device, which shall be kept closed during periods of operation. Cl Provide a roof overhang over the loading area or install door skirts (cowling) at each bay that enclose the end of the trailer. Cl N. Fire Sprinkler Test Cl Provide a means to drain f"ue sprinkler Cl See the note in Fact Sheet SC-41, Water test water to the sanitary sewer. "Building and Grounds Maintenance," in the CASQA Stormwater Quality Handbooks at www.cabmnhandbooks.com Page 8 of9 --- - -- -- ---- ------- 0. Miscellaneous Drain [J Boiler drain lines shall be direcdy or or Wash Water indirectly connected to the sanitary sewer system and may not discharge [J Boiler drain lines to the storm drain system. [J Condensate drain lines [J Condensate drain lines may discharge to landscaped areas if the flow is small [J Rooftop equipment enough that runoff will not occur. Condensate drain lines may not [J Drainage sumps discharge to the storm drain system. [J Rooimg, gutters, and Rooftop mounted equipment with trim. potential to produce pollutants shall [J be roofed and/ or have secondary containment. Any drainage sumps on-site shall feature a sediment sump to reduce the [J quantity of sediment in pumped water. Avoid rooimg, gutters, and trim made of copper or other unprotected metals [J that may leach into runoff. Jid. P. Plazas, sidewalks, IX" Plazas, sidewalks, and parking lots and parking lots. shall be swept regularly to prevent the accumulation of litter and debris. Debris from pressure washing shall be collected to prevent entry 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. Page 9 of9 I I I I I I I I I I I I I I I I I I I SECTION 2: IDENTIFY POLLUTANTS, BMP SIZING AND SELECTION Consult with Geotechnical Engineer Redesign LIOorBMP 4. Size LID and BMP Facilities for Flow Range of 0.1 0. to 0 ·· FIGURE 2-2. Mitigation Criteria and Implementation I 38 City of Carlsbad SUSMP -January 14, 2011 SLOP£, ORAINAC£ .t lANDSCAPF £AS£M£NT P£R DOC. No. 2008-050158/i ____ Rfi_C. ~1/20/2008 2' ·f I I IYIO TH VA/I/£S S££ PlAN WAT£/i S/IHFAC£- -60 -··--·-·- PROPERTY UNE Lor 1 MAP 7[}!4 I r I I I i ---'--~,-- J \/ 4.5' 5' 1------"----1 I 1/ND£1/G/IOIJNO GAHAG£ --JI~I 18" !liN. SAND/COMPOST -S££ NOT£ J BROW. !./IX WITH 5"/Hii MIN. INfilTRATION RAJ< TO B£ 11£/i/f/£0 BY CfOTECHNICAl £NC/N££/i NOTES: -- ·-·-... _.,_ .. 60" HOP£ STOI/II DRAIN fOil D£TENTION I. 8/JP TO COIJPl Y WITH CITY Of CAHlSBAO SIISMP IJA T£0 .JANIIAHY 4, 2011. r•~ 2. Bt.IP SHAll 8£ H£'4£M3J ANO APPIIOV£0 BY CEO TECHNICAl [NG/NE£11. ' J: 18" SOIL coiiPoST J./IX Sf/Ali CONTAIN: ... 71' ..e, • PFIIFORAJ<O PIP£ ~ /.OK MIN. L£SS TIIAN 5% ClAY 50%-50% s.ANO -.---------- -.- SECTION A -A BIORETENTION {THEATMENT d' HYOROMOO/r!CATION) NOT TO SCAlf 20%-JO:t COMPOST OR HA/10/Y()(}/) J./1/lCH 20%-JO% TOPSOil (NOlE 4) '1. REcot.IAI£NOA 1/0NS FOR BIOII£TENTION FAC/Ul/£S P£R £AST CO/INTY SOil CONS/JIJA 1/0N AND fNG/N££1//NG, INc. lfTT£11 FOR PREIJMINARY CHA!J/NG PlAN AND D£TA/lS R£V/EW DAlEO J/INE 16, 2012. SECTION 8-8 8/0RETENTION (THEATMENT .t VAUlT} NOT TO SCAlf !0" HOP£ SD :.?-4" tk 6" HOP£ SO ,\ \\ \ BlllllDING. UN£ __.-\ SECTION 'F-f''-S££ ~ HIGHT DETAIL-8-5 &-8-6 CLEANOIJT SCAL£-1"=10' • • • _..----.RN/5'11 GRAO£ • ... • --- -----. -.... 4" P£HFOHAT£0 PIP£ /.0% £NCAS£0 IN 12" THICK GHA Vll 60" HOP£ STORII DIIAIN FO/i IJ£T£NTION-~ RNISH GHAD£ .' • • • .d SCAl£· 1"~4' ---- --~ M ~-----~·----M--.. ···--'" ·--------~. ~--·--------.. --· _ .. -----· - --~o -----...,~----... -- ,.----- 4' PVC 110' B£NO o· s· 2o' ---1 o' 40' SCALE: 1' = 20' TYPE ---~- NOTES: f. PARKING GARAC£ flOO/i ORAINS Will 8£ PliJJ./B£0 TO SANITARY S£W£R 2. IN TH£ £V£NT TIIAT TH£ POOl AND S"A N££1)S TO B£ DRA/N£0, TH£ WAI<Ii !JAY B£ PIJJ./P£0 INTO Til£ STOH!.I DRAIN SYSml, PHOV/D£0 THAT Til£ POOl WAJ<Ii HAS 8££N 0£-CHLOH/NATEO. 0£-CHlOR/NATION Of Til£ POOl WATER CAN 8£ ACH/£11£0 BY l£TTING TH£ WAI<R SIT WITHOUT ADDING AOO/TIONAl CH£!.1/CAlS. IF, HOW£¥£11, A N£W !lSI P£/1!.1/T IS IN PlAC£ THAT PHOHIBITS PDOl AND S"A WATER FHO!i £NT£11/NG TH£ STOR!i DIIAIN SY5T£M, TH£ WAJ</i SHAll 8£ DRAINED ACCORDING TO TH£ N£W P£H!.I/T 11£GIIlATIONS. ; J. TIIASH £NClOSIJ/I£ IN iJND£1/GiiO//NO GA/IAC£ SIGNS SHAll B£ POST£0 • DO HOT D/1!./P HAZAHDOIJS MATcHIAlS H£H£ • TYPE SLOPE BMPIO BMP1 8MP2 BMPJ 8MP4 IMP lECENO: ------- r .-;-: ""'7,-or ..,. .;~ . ~. , .. , .. . ,.,.· .. .-.... , r.:...!...-.!.:... ·:~::....... ..... .. ~ ~ . ~ .... · .......... . .. ·. . .. . .. . .. . ·. Ill 111!111!1 i!liii!IIU II 111111 * IN ADD/liON TO !REA TMENT BY PERVIOUS PAVEMENT, A TRENCH DRAIN Fll TER Mil BE INSTAllED AT lHE LOW POINT OF PRIVATE DRIVE II' BMP TABLE TREATMENT CONTROUHYDROMODIFICATION FACILITIES BMP ID# BMPTYPE SYMBOL CASQA NO. QUANTI'IY DRAWING NO. SHEET NO.(S) INSPECTION MAINTENANCE ' FREQUENCY FREQUENCY 0 BIORETENTION [\::::il TC-32 600SF 475-8 4&6 SEMI-ANNUAL SEMI-ANNUAL AREA ®-0 BIORETENTION r.--Il TC-32 700SF 475-8 4, 5&6 SEMI-ANNUAL SEMI-ANNUAL AREAWNAULT L\::.: ( 0 TRENCH DRAIN liiiiiiiiiiil MP-52 1EA 475-8 5 QUARTERLY DEBRIS REMOVAL FILTER WNAULT EVERY QUARTER LOW IMPACT DESIGN (LI.D.) BMP ID# BMPTYPE SYMBOL CASQA NO. QUANTI'IY DRAWING NO. SHEET NO.(S) INSPECTION MAINTENANCE FREQUENCY FREQUENCY ~-® PER VIOLS ~ SD-20 5420 SF 475-8 11 ANNUALLY ANNUAL VACUUM PAVEMENT TO PREVENT CLOGS SOURCE CONTROL BMPID# BMP'IYPE SYMBOL CASQA NO. QUANT\'IY DRAWING NO. SHEET NO.(S) INSPECTION MAINTENANCE FREQUENCY FREQUENCY STORM DRAIN SYSTEM SIGN rv-cv 'NO DUMPING\ ~ SD-13 2EA SWMP ANNUALLY VERIFY LEGIBIUTY OF SIGNS PLOWS TO BATIQU\TOS LAGOON' STENCIL ON ALL CURB INLETS SITE DESIGN & f:V-© LANDSCAPE SD-10 VEGETATIVE MANAGEMENT PLANNING ~ • SEMI-ANNUAL REPAIR BROKEN SPRINKLERS EFFICIENT SD-12 AS NEEDED IRRIGATION ® SIDEWALK ~ • SIDEWALKS SHALL BE WEEKLY SWEPT REGULARLY TO PREVENT SWEEPING . BUILDUP OF L\TIER & DEBRIS ~-@ ROOF DRAIN TO • SD-11 475-8 4,5&6 QUARTERLY DEBRIS REMOVAL LANDSCAPING EVERY QUARTER SEE NOTES 1-3 FOR TRASH ENCLOSURES, POOL & SPA AND UNDERGROUND PARKING GARAGE SITE DESIGN a• HOP£ 01/TL£1 SO .2" OIA. ORIF/C£ PlATE BIOII£T£NT/ON ~2) 0.3" 0/A. ORIRC£ PlATE BIOfiET[NTION fJ) OPENING AT BOTTO!/ S££ 0£TA/l AT HIGHT NOTE OR\I'ICE PlATE: MIN SQUARE DIMENSIONS 1.0 fT GREATER ·Ti'Wt ~IPE DIA. HoT-DIP GALVANIZED PLATE AfTER H.Ol.ES HAVE BEEN O)lii.LED ,,. 8" DIA IN e• (iYP) • (NP) 1. . ORIFlCE PLATE' .ir Fl.ANG£ CONNECTION TO CONCRETE. SHALL BE FITTED WITH l"MAX t 1-WHEREW S~~$N ON PLAN ={=j=~·~~D". -f--:<-:R-IFICE DIAMETER (Dill) 30 DUilQMETER NEOPRENE RING. SIZEP PER OESIGN CRITERIA j• DIA HOLE (l'IP) 0 INFLOW 6' SD FLOW CONTROL ORifiCE PLATE PROPERTY UNE DRAINAC£ AREA TO BMP OMA AII£A BIOII£T£Nl/ON AII£A P£RfiO(JS CONCR£7E -S££ D£TA/l 8£lOW IMP£HVIO/IS S/D£WAlK IMPFRV/01/S ROOF SELF-TII£A liNG AII£A STORM DRAIN CATCH BASIN /N/£7 STORM IJHAIN T/IENCH OHA/N INlET W/ll!OI.I£lJIA GR££N fillER fillER J./AN/JFACTIJ/1£0 BY 8/0Cl£AN £NVIRON!.I£NTAl SEJ/VICES, (160} l.JJ-Jf76. S££ ATTACHA/£NT 12 FORII£MOVAl EFF/CI£NCY ANIJ Af){)fl/ONAl SP£Cif/CA TIONS. CONSTRUCTION SIGN OFF CONSTRUCTION SIGN OFF CONSTRUCTION SIGN OFF BIORETENTION CATCH BASIN DETAIL NOT TO SCAlf 6" HOP£ ~ 0.5% NOT TO SCAlf 0 0 NOTE: 1. ORIFICE PLATE I< fLANGE CONNECTION TO CONCRETE SHALL BE f\TEED WITH 30 DUROMETER NEOPRENE RING. 4" DIA OUTfLOW PIPE L ORifiCE PLATE: MIN • SQUARE DIMENTIONS 1.0IT. GREATER THAN PIPE DIA. HOT -DIP GALVANIZED PLATE AFTER HOLES HAVE BEEN DRILLED f DIA HOLE ORifiCE DIAMETER SIZED PER DESIGN CRITERIA MODIFIED FLOW CONTROL ORIFICE PLATE NOT TO SCAL£ NON-WOY£N G£0/<KT/l£ (MIHAn 150 N Oil EQIIIVAl£NT. S/I~RAO£COIIPACT£0 TO 95% TO 8£ V£Nifi£D IN fl£lD BY /i-VAL/1£ TEST li' PFHV/01/S CONCH[T£ 011£/i 4" AB ~ • 0/A, MIN.) 011£11 6" OPEN GRAD£0 GRA rn (2"-J" C/11/SH£0 AGII£GAT£) DETAIL -P£RVIOIJS CONCRETE NOT TO SCAlE ATTACHMENT 10 '~'' 2710 Loker A~nue West Suite 100 Carlsbad, California 92010 760-931-7700 Fo)(: 760-931-8680 www.odayconsultants.com Civil Engk1eering Planning Processing Surveying DESIGNED BY: -"'Nfc___ DATE: FEB 2012 DRAWN BY: TG SCALE: ]" = 20' PROJECT MGR.: KWH JOB NO.: 03-1060 ENGINEER OF WORK: G: \OJ1060\Dralnage\flnol\0360ex-hydromod.dwg Oct 03, 2012 8:46am X<efo: 0360AGRO; 03607ull; 0360A~AP: 0360AUTt, 0360ASITE: 03601?01; ExhlbltK I I I I I I I I I I I I I I I I I I I Attachment 11 Calculations for the Bioretention Areas I I I I I I I I I I I I I I I In order to meet Hydromodification requirements outlined in the Final Hydromodification Plan prepared for the County of San Diego on January 13,2011 by Brown and Caldwell, the BMP Calculator was utilized to determine the minimum surface area and volume required for each BMP. See the calculator output attached. BMP 1 will be a bioretention facility with hydromodification in the gravel layer below. Since the BMP is fully lined and no storm water will infiltrate into native soils, the BMP was modeled as a flow-through planter. BMP 2, 3, and 4 were modeled as Bioretention +Vault. A summary of the minimum requirements from the BMP Calculator vs. actual provided is shown below'. See Attachment #10 for details. BMP Summary Table BMPID BMPArea BMPArea Volume 1 Volume 1 Volume 2 Volume2 Required Provided Required Provided Required Provided BMP1 592 SF 600 SF 493 CF 498 CF 355 CF 360 CF BMP2 181 SF 200 SF 996CF 1,000 CF* 0 0 BMP3 494 SF 500 SF 2721 CF 2884 CF* 0 0 BMP4 NIA*** N/A *** 115 CF 121 CF** 0 0 *Volume 1 for BMP 2 and BMP 3 is achieved through a series of60" HDPE storm drain pipes. See Attachment 10 for details. **Volume 1 for BMP 4 is achieved through a 4.0'x 6.0' cleanout, 4.0 foot deep. *** Due to the steep driveway, a bioretetention area is infeasible to drain the pervious pavement driveway. A trench drain filter utilizing BioMediaGREEN filter, by Bio Clean Environmental Services will be utilized. See Attachment 12 for removal efficiencies for this high performance filter. . ---Report Result --- -- Project Summary Project Name Vista La Costa Project Applicant Diversified Development Jurisdiction City of Carlsbad Parcel (APN) 21629021 Hydrologic Unit Carlsbad Compliance Basin Summary Basin Name: VLC Receiving Water: Exist 48' Stormdrain Rainfall Basin Oceanside Mean Annual Precipitation (inches) 13.3 Project Basin Area (acres): 0.80 Watershed Area (acres): 0.00 SCCWRP Lateral Channel Susceptiblity (H, M, L): SCCWRP Vertifical Channel Susceptiblity (H, M, L): Overall Channel Susceptibility (H, M, L): HIGH Lower Flow Threshold(% of 2-Year Flow): 0.1 Drainage Management Area Summary ID Type BMPID Description 16374 Drains to LID BMP1 DMA-1R 16375 Drains to LID BMP1 DMA-1L 16376 Drains to LID BMP2 DMA-2R 16377 Drains to LID BMP2 DMA-2L -- 16379 Drains to LID BMP3 DMA-3R 16380 Drains to LID BMP3 DMA-3S ·-·--·-· ..... ._,_, . ---··-·-.. ····------· . .... ·------·-··· ···-···---·· -·-··-··-·-·· ···-·· 1_ 4-4-_ II _ 1_ -1. -1 _, rt'T • - - - - ----- --Page 1 of2 Area (ac) Pre-Project Cover Post Surface Type Drainage Soil Slope 0.08 Pervious (Pre) Roofs Type D (high runoff-clay Flat -slope (less ... soi ... 0.05 Pervious (Pre) Landscaping Type D (high runoff -clay Flat -slope (less ... soi... 0.1 Pervious (Pre) Roofs Type D (high runoff-clay Flat -slope (less ... soi... 0.04 Pervious (Pre) Landscaping Type D (high runoff-clay Flat -slope (less ... soi... 0.21 Pervious (Pre) Roofs TypeD (high runoff-clay Flat -slope (less ... soi... 0.06 Pervious (Pre) Concrete or asphalt Type D (high runoff -clay Flat -slope (less ... soi. .. ···--·· --·-··---··-·-··· ·------------·----·· ----..---·-·----------·------------------··---··-···---·-·······---··-·---··------------···----------- 1 tn·~ r'T'I 11 ··IT"\ ,, -- - - -- -- - Report Result 16381 Drains to LID BMP4 DMA-4P 0.09 16382 Drains to LID BMP3 DMA-3L 0.14 ·--f-···-··-····--····· .... ______________ ,. ______ .. ·-····-·······--·· ···-·-··-··· ·---········-·--·-·· --···---·-··-· 16450 Drains to LID BMP4 DMA-4L 0.03 LID Facility Summary BMPID Type Description BMP1 Flow-Through Planter BMP1 BMP2 Bioretention + Vault BMP2 BMP3 Bioretention + Vault BMP3 BMP4 Bioretention + Vault BMP4 II 1 1 1 - - Pervious (Pre) Pervious (Pre) -- - - - Pervious concrete or asphalt Landscaping Type D (high runoff -clay soi... Type D (high runoff-clay soi... - - Page 2 of2 Flat -slope (less ... Flat -slope (less ... ··-·····-·····-·····-·····-· ····-------··· ······-······-·---·-·-·····---··--------·--·---··-·--·-- Pervious (Pre) Landscaping Plan Area (sqft) Volume 1(cfl) 592 493 181 996 494 2721 20 115 Type D (high runoff -clay soi. .. Volume 2(cft) Orifice Flow (cfs) 355 0.002 0.00 0.002 0.00 0.007 0.00 0.002 Flat -slope (less ... Orifice Size (inch) 0.2 0.2 0.3 0.2 - I I I I I I I I I I I I I I I I I SPECIFICATIONS Trench Drain Filter (with BioMediaGREEN) I. Specifications Coverage: The Trench Drain Filter with BioMediaGREEN provides full coverage of trench drains, at rated flows, is conveyed to the filter. The filter will retain all windblown and swept debris entering the drain. The Trench Drain Filter is located directly beneath the trench drain grate for direct service/access from the surface. The filter is made to direct water flow from the trench grate through the filter media before entering the trench unit. Non-Corrosive Materials: All components of the filter system, including mounting hardware, fasteners, support brackets, filtration material, and support frame are constructed of non-corrosive materials. The frame is manufactured of marine grade fiberglass, gel coated for UV protection. No polypropylene, monofilament netting or fabrics shall be used. Durability: Filter (excluding filter media) and support structures are of proven durability, with an expected service life of 10 to 15 years. The filter and mounting structures are of sufficient strength to support water, sediment, and debris loads when the filter is full, with no slippage, breaking, or tearing. All filters are warranted for a minimum of five (5) years. Primary Filtration Media: The Trench Drain Filter is fitted with BioMediaGREEN filter media. The filter media treats influent at a rated flow before going into bypass. BioMediaGREEN has been independently proven to treat TSS, oils & grease, and other particulate pollutants, fine TSS, hydrocarbons, nutrients, metals, and bacteria. BioMediaGREEN is a proprietary filter media with a high sorptive capacity for dissolved pollutants. POLLUTANT Oil & Grease (mg/L) TPH (ma/L) TSS (mQ/L) Fecal Coliform (MPN/1 OOmL) Total Phosphorus (mg/L} Dissolved Metals (mg/L) Removal Efficiencies 90% 99% 85% 68% 69.6% 75.6% Sii-Co-Si1106. Mean particle diameter= 19 microns Filter Bypass: Water will not bypass the filter inlet contact surfaces at low flows. Filter Media Replacement: Removal and replacement of the filter media is accomplished without the necessity of removing mounting bolts, support frames, etc. Pollutant Removal Efficiency: The Trench Drain Filter is designed to capture high levels of trash and litter, grass and foliage, sediments, hydrocarbons, grease and oil, fine TSS, nutrients, metals, and bacteria. The filter has a multistage filtration system, which incorporates durable screen and steel mesh filtering followed by primary filtration provided by BioMediaGREEN. II. Installation Installation: The filter will be securely installed in the trench drain, with contact surfaces sufficiently joined together so that no filter bypass can occur at low flow. All anchoring devices and fasteners are installed within the interior of the drain inlet. Installation Notes: 1. Bio Clean Environmental Services, Inc. inlet filter inserts shall be installed pursuant to the manufacturer's recommendations and the details on this sheet. 2. Inlet filter insert shall provide coverage of entire trench inlet opening 3. The Trench Filter is installed by lifting the grate and inserting the filter so the filter lip sits underneath the grate. The filter is manufactured so the sections overlap each other for easy installation. I I I I I I I I I I I I I I I I I I I 111. Maintenance Maintenance: The filter is designed to allow for the use of manual or vacuum removal of captured materials in the filter structure. The filter is serviceable manually or by centrifugal compressor vacuum units without causing damage to the filter during normal cleaning and maintenance. Filters can be cleaned easily by simply removing the grate to expose access to the filter. The filter media then are removed and the trash and debris can be removed from the structure. At each cleaning, new filter media should be installed by placing in the filter. Maintenance Notes: 1. Bio Clean Environmental Services Inc. recommends cleaning and debris removal maintenance a minimum of four times per year, and replacement of BioMediaGREEN a minimum of twice per year. 2. Following maintenance and/or inspection, the maintenance operator shall prepare a maintenance/inspection record. The record shall include any maintenance activities performed, amount and description of debris collected, and condition of filter. 3. The owner shall retain the maintenance/inspection record for a minimum of five years from the date of maintenance. These records shall be made available to the governing municipality for inspection upon request at any time. 4. For maintenance and cleaning remove grate to gain access to inlet filter insert. Where possible the maintenance should be performed from the ground surface. Note: entry into an underground stormwater vault such as an inlet vault requires certification in confined space training. 5. Remove all trash, debris, organics, and sediments collected by the inlet filter insert. 6. Evaluation of the filter media shall be performed at each cleaning. If the media is filled with pollutants and oils it should be replaced. 7. Transport all debris, trash, organics and sediments to approved facility for disposal in accordance with local and state requirements. 8. The BioMediaGREEN filter media should be disposed of according to local and state requirements. P 0 Box 869, Oceanside, CA 92049 (760 433-7640 Fax (760) 433-3176 www .biocleanenvironmental.net I I I I I I I I I I I I I I I I I I I Test Run BIC MEDIA-GREEN Pollutant Removal Performance Summary pH TSS(mgtL) TKN (mgtt) Dissolved Phosphorus (mgll) Ortho Phosphorus (mgll) Dissolved Cadmium (moll) Dissolved Copper(mgll) Influent Effluent Influent Effluent Influent Effluent Influent Effluent Influent Effluent Influent Effluent Influent Effluent 7.07 7.21 73 17 0.584 0.48 0.951 0.34 Averages Average Removal Efficiency (•fo) Test Run Averages Average Removal Efficiency (0/o) Test Run Averages Average Removal Efficiency (•to) 7.13 7.13 8.65 8.65 9.49 9.53 8.65 8.7 8.65 8.69 8.65 8.69 8.65 8.69 8 0725 8.70625 52 52 100 100 100 100 100 15 13 84.63 12.40 as.:uw. Using Sii-Co-511106 Mean partide size= 19 microns Dissolved Lead Dissolved Zinc (mgll) (mgll) 10.4 10.4 8.29 8.64 10.4 10.9 10.4 10.1 10.4 74 10.40 9.07 12.83% Dissolved Mercury (mgiL) 3.81 3.81 1.37 1.37 0.46 0.39 0.88 0.75 1.37 0.72 1.37 0.69 1.37 0.7 2.07 0.63 69.86-J. Oil &Grease (mgll) Influent Effluent Influent Effluent Influent Effluent Influent Effluent 11 0.201 0 015 1.33 0.93 0.009 0.192 0.005 1.32 0.05 0006 0.192 0.005 1.32 0.05 0.006 0.492 0.008 0.4 0.06 n/d 0.492 0.492 0.007 0.005 0.4 0.4 0.08 0.05 nld nld 0.002 360 0.002 67 0.002 87 nld 13 nld nld 13 13 0.492 0.005 0.4 0.05 nld nld 13 10 0492 0.005 0.4 0.05 nld n/d 13 12 0.75 0.16 0.01 0.00 69.88 6.50 78.22-J. 71.43-J. 90.70% Total Coliform Fecal Coliform (MPN/100 ml) (MPN/100 ml) Influent Efflwnt Influent Effluent 1600000 1800000 1250000 500000 1600000 500000 1250000 300000 1600000 500000 1250000 300000 1600000 900000 1250000 500000 1600000 875000 1250000 400000 3.98 3.98 3.13 2.15 3.98 2.2 3.98 2.11 3.98 2.04 3.98 2.33 41.51W. TPH (mgtL) Influent 1.4 1.4 1.4 1.4 1.4 Effluent 1.40 0.00 100.000/. •Laboratory Testing· Average Removal Effh:aencies. Tested at Flow Rate of 3 GPM Per Square Foot Media Surface Area & Minimum Head Distributed Exclusively by Blo Clean Environmental Services, Inc. 760..433·7840 www.blocleanenvlronmental.net 0.503 0.503 0.302 0.302 0.01 0.006 0.192 0.193 0.302 0.206 0.302 0.203 0.302 0.193 0 39 0.19 52.18% Turbidity (NTU) Influent Effluent 36 0.2 36 36 0.5 0.2 36 0.5 36 0.2 0.906 0.906 0.354 0.354 0.009 0.005 0.115 0.119 0.354 0.13 0.354 0.11 0.354 0.117 0.57 0.12 79.15% -- -- -- -- - - - ----TRENCH GRATE FILTER vv BioMedia Green MODEL # 5-12 I TREATMENT FLOW RATE = .075 cFs PER LINEAR FooTi 6" OR MORE I· 8" TO 10" • I FOR ODD SIZE TRENCHES FLANGES CAN BE CUT WITH ALMOST ANY SKILL .SA\N \NITH CARBIDE BLADE TO INSTALL SIMPLY REMOVE: GRATE: PLACE: IN INLET FIL TE:R AND REINSTALL GRATE: TO ITS ORIGINAL LOCATION <I 6" OR MORE -- - BIOMEOIA GREEN TESTED REMOVAL EFFICIENCIES ~!!""' 85% -"""""""' 69% --41% -"-79% --98% -rc 78% _,._, 71% 1Ift 99% ru"*" 68% fiNAL-A - ~~J /1-/ ~~,...--------1 ~ ~ 760-433-7640 BIO CLEAN E:NVIRONME:NTAL TO INSTALL THE: MODEL .5-12 IN A WIDER OPENING SUCH AS SHOWN INSTALL 3/4" ANGLE: WITH 1/4'' DRIVE: PINS, PLACE IN INLET FILTER """'f'o.JD ~Etf'o.JSI"""'LL G~..AIE 10 tiS 0~/Glf'o.J"""'L LOC:..AIIOJ"o.J PO BOX 869 I TRENC:I-f GRATE F/L TER DATE:: 04/24/07 SCALE::SF = 17.5 DRAFTER: N R B UNITS =INCHES - ---- - ---- - - --- - - - TRENCH GRATE: PIL TE:R vv BioMedio Green BIOMEDIA GREEN TESTED REMOVAL MODEL # 5-12 EFFICIENCIES ----85% '5l-ll>-SIItlf" _,.,...... 69% I TREATMENT FLOW RATE = .015 CFS PER LINEAR FOOTJ _,.,...... 41% --79% TO INSTALL SIMPLY REMOVE GRATE PLACE IN INLE:T FILTER AND REINSTALL GRATE TO ITS ORIGINAL LOCATION ---lite _....., ""' 98% 78% 71% 99% 1 4-'--" 4 I • 6" OR MORE 8" TO 10" I I FOR ODD SIZE TRENCHES FLANGES CAN BE: CUT WITH ALMOST ANY SKILL SA\1\1 VVITH CARBIDE BLADE 1~" 8 <1 <1 TO INSTALL THE: MODE:L 5-7 2 IN A WIDE:R OPENING SUCH AS SHOWN INSTALL .3/4"" ANGLE WITH 1/4'' DRIVE PINS, PLACE IN INLET FILTER ....,.,_f'..JD ~Eif'..JST....,.,.L.L. G~....,.,_TE TO ITS O~IGif'..J....,.,_L. L.OC:....,.,.TIOf'..J r•~ 68% fiNAL-A 6" 760-4.3.3-7640 810 CLEAN ENVIRONMENTAL PO eox 869 I TRENCI-f GRATE FILTER DATE: 04/24/07 SCALE:SF -17.5 DRAFTER: N R E3 UNITS =INCHES -