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HomeMy WebLinkAboutCT 01-09; LA COSTA TOWN SQUARE; STORM WATER MANAGEMENT PLAN; 2013-07-01'Jl STORM WATER MANAGEMENT PLAN ^.j^^. FOR LA COSTA TOWN SQUARE COMMERCIAL CT. 01-09 SW 12-05 March 2005 Revised: March 2007 Revised: April 2008 Revised: October 2008 Revised: January 2009 Revised: February 2012 Revised: July 5,2012 Revised: September 10,2012 Revised: May 7,2013 Revised: May 29,2013 Revised: June 21,2013 Revised: July 1,2013 Prepared For: Property Development Centers 5918 Stoneridge Mall Road Pleasanton, CA 94588 Phone: (925) 738-1232 Prepared By: O'DAY CONSULTANTS, INC. 2710 Loker Avenue West, Suite 100 Carlsbad, CA 92010 J.N. 10-1290-03 La Costa Town Square Commercial SWMP TABLE OF CONTENTS TABLE OF CONTENTS. ATTACHMENTS: 1 ii 1. PROJECT SETTING 1 2. APPLICABLE STORMWATER STANDARDS 4 2a. Storm Water Standards Questionnaire 4 2b. HMP Applicability Determination 4 3. IDENTIFY POLLUTANTS OF CONCERN 5 3a. Identify pollutants associated with type of project/use 5 3b. Identify watershed, hydrologic unit basin and receiving waters 5 3c. List impaired water bodies 6 3d. Beneficial uses of receiving water 6 3e. Summarize primary pollutants of concern 8 4. SOURCE CONTROL MEASURES 9 4a. Description of site activities and potential sources of pollutants 9 4b. Stormwater Pollutant Sources and Source Controls 9 5. LOW IMPACT DEVELOPMENT (LID) DESIGN STRATEGIES 13 6. INTEGRATED MANAGEMENT PRACTICES (IMP's) 14 6a. Selection process for IMP's 14 6b. Sizing factors for IMP'S 14 6c. Geotechnical recommendation on soil infiltration rates 14 6d. Infiltration calculations 14 7. TREATMENT CONTROL BMP's 15 8. HYDROMODIFICATION 16 8a. Lower Flow Threshold Determination 16 8b. Continuous Simulation Model 17 8c. Tabulation of Flow-control Facility Sizes and Design Criteria 17 9. DOCUMENTATION OF STORMWATER DESIGN 18 9a. Hydrology maps 18 9b. BMP Sizing Calculator 18 10. BMP FACILITY MAINTENANCE REQUIREMENTS 19 10a. Ownership and responsibility of maintenance of BMP's 19 10b. Summary of maintenance requirements 19 11. SWMP CERTIFICATION STATEMENTS 20 La Costa Town Square Commercial SWMP ATTACHMENTS: 1. Storm Water Standards Questionnaire 2. BMP Plan Exhibit 3. DMA Map Exhibit 4. Summary of BMP Calculator Reports Results 5. BMP Calculator Report Results 6. Urban Green®Biofiltration Specifications and Details 7. Bioretention Basin Specifications and Details per Carlsbad Drawing 409-4C 8. Hydromodification Design for Detention Basin I:\001017\_Commercial\Stormwater\SWMP\LCTS SWMP - Commercial_City.doc La Costa Town Square Commercial SWMP 1. PROJECT SETTING The La Costa Town Square Commercial project is located south and east of Rancho Santa Fe Road and north of La Costa Avenue in the City of Carlsbad, California (see Vicinity Map below). The La Costa Town Square Commercial site is part of a master planned development consisting of residential, office, and commercial uses. The entire site is approximately 74 acres with about 8 acres located north of Rancho Santa Fe Road. The 42-acre mixed use commercial component will consist of retail shops, a grocery store, restaurants, a gas station, and a home improvement center that includes a garden center. \ CITY OF OCEANSIDE "^A HIGHWAY OF MARCOS S/TF PACIFIC OCEAN CITY OF ENCINITAS VICINITY MAP NO SCALE I:\001017\_Commercial\Stonnwater\SWMP\LCTS SWMP - Commercial_City.doc La Costa Town Square Commercial SWMP The site is generally described as mostly undisturbed vacant land with the exception of small borrow and stockpile sites for the grading and improvements of Rancho Santa Fe Road and La Costa Avenue per City of Carlsbad drawing 409-4C. The disturbed areas have since revegetated. The site is steep with well- defined drainage courses and generally slopes toward the south with slopes ranging from 10% along the northern portion to 18% southerly. There are several drainage courses with steep side slopes greater than 40%. The area north of Rancho Santa Fe Road is a previously graded flat pad. The USDA Natural Resources Conservation Service (NRCS) Web Soil Survey identifies Huerhuero loam as the predominant soil type, which represents Hydrologic Soil Group D. The percentage breakdown is as follows: Hydrologic Soil Group— Summary by Map Unit — San Diego County Area, Califomia (CA638) Map unit symbol Map unit name Rating Acres in AOI Percent of AOI AtE Altanx>nJ clay, t5 to 30 percen! slopes D 4.t 9.S% HfC2 Huerhuero toam. 6 to 8 percent slopes, eroded D 5.6 •3.£% HrD2 Huerhuero loam. 8 to 16 percen; slopes, eroded D 21.4 512% SbC Salinas clay ksam, 2 to 9 percent slopes B 0.0 3.C% SnG San Miguel-Exchequer rocky silt loarr s. 9 lo 70 percefit stopes D 10.6 25.4% Totals for Area of Interest 41.8 100.0% Hydrologic Soils Group D soils have a very slow infiltration rate (high runoff potential) when thoroughly wet. These consist chiefly of clays that have a high shrink-swell potential, soils that have a high water table, soils that have a claypan or clay layer at or near the surface, and soils that are shallow over nearly impervious material. These soils have a very slow rate of water transmission. The proposed land use is commercial retail, restaurants and fueling station. Typical activities that could affect storm water include: fuel dispensing; food service; loading docks; landscape maintenance; pest control; hazardous material use; refuse services; storage; fire sprinkler testing; and miscellaneous wash water. Stormwater control and treatment constraints include: poor soil type and permeability (soil type D); high intensity land use; steep terrain; heavy pedestrian or vehicular traffic; restricted right-of-way; and safety concerns. Opportunities include landscape buffer areas, open space set aside for water features, and elevation differences. Under existing conditions, there are three locations where runoff from Rancho Santa Fe Road discharges to the site as indicated on City of Carlsbad Rancho Santa Fe Road improvement plans Drawing No. 368-2, sheet 42 and Drawing No. 368-2c, sheets 14 and 15. One discharge point onto the site is an existing detention facility constructed per the Rancho Santa Fe Road improvements. All site drainage runs south where it enters the City of Carlsbad's MS4 at three separate locations along La Costa Avenue. Drainage from the site then combines with flows from various portions of The Village of La Costa, and The Oaks and flow into a detention basin built with The Oaks project. Controlled discharge from the basin I:\001017\_Comniercial\Stormwater\SWMP\LCTS SWMP - CommerciaLCity.doc La Costa Town Square Commercial SWMP eventually discharges to Encinitas Creek, which ultimately flows into Batiquitos Lagoon and finally the Pacific Ocean. Under proposed conditions, 1/3''' of the site will drain toward the east into the City's MS4 (Point of Compliance No. 1 - Basin 1)). The remaining 2/3'" ofthe site will drain to the west and tie into the City's MS4 along La Costa Avenue (Point of Compliance No. 2 - Basin 2). Treatment and flow controls will be done on all site drainage prior to entering the City's storm drain system. Discharge points to the City's MS4 remain unchanged. I:\001017\_Commercial\Stormwater\SWMP\LCTS SWMP - Commercial_City.doc La Costa Town Square Commercial SWMP 2. APPLICABLE STORMWATER STANDARDS 2a. Storm Water Standards Questionnaire Results of the completed City of Carlsbad Storm Water Standards Questionnaire (SWSQ) indicate this project to be a Priority Deveiopment Project (PDP) and therefore must comply with additional stormwater criteria per the SUSMP. (See Attachment 1 for completed SWSQ) 2b. HMP Applicability Determination According to Figure 2-1, HMP Applicability determination flowchart below, Hydromodification controls are required. A hydromodification screening analysis ofthe downstream channel (Encinitas Creek) was prepared by Chang Consultants (See Hydromodification Screening for La Costa Town Square, dated May 3, 2013) to determine the applicable flow threshold. The hydromodification screening analysis demonstrates that the peak flows and durations from the site can be mitigated using a flow threshold of 0.5Q2 (high flow threshold and low susceptibility). FIGURE 2-1. HMP Applicability Determination 4 I:\001017\_Commercial\Stormwater\SWMP\LCTS SWMP - Commercial_City.doc La Costa Town Square Commercial SWMP IDENTIFY POLLUTANTS OF CONCERN 3a. Identify pollutants associated with type of project/use Table 2-1 ofthe SUSMP (see below) identifies the pollutants anticipated from the La Costa Town Square Commercial Development and associated improvements as indicated by the shaded categories. TABLE 2-1. ANTICIPATED AND POTENTIAL PoUutants Generated by Land Use Type. General PoUutant Categories Priority Project Categories Sediment Nutrients Heavy Metals Organic Compounds Trash & Debris Oxygen Demanding Substances Oil& Grease Bacteria & Viruses Pesticides Detadied 'Residential Development X X X X X X X Attached Residential Development X X X P(l) P(2) P X Commercial Development >one acre P(1) X P(2) X l'(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 I'd) 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 GasoUnc Outlets X X X X X Streets, Highways & Freeways X P(l) X X(4) 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 parking areas. (3) A potential pollutant if land use involves food or animal waste products. (4) Including petroleum hydrocarbons. (5) Including solvents. 3b. Identify watershed, hydrologic unit basin and receiving waters The project is located in the Batiquitos Lagoon Hydrologic Subarea (904.51) ofthe Carlsbad Hydrologic Unit in the San Diego Region All site drainage from La Costa Town Square enters the City of Carlsbad's MS4 at three separate locations along La Costa Avenue. Mitigated flows from the site confluences with flows from surrounding developments before being conveyed southerly to Encinitas Creek approximately 1.9 miles downstream. It then enters Batiquitos Lagoon about 1.6 miles further downstream. I:\001017\_Commercial\Stonnwater\SWMP\LCTS SWMP - Commercial_City.doc La Costa Town Square Commercial SWMP 3c. List impaired water bodies According to the California 2006 303(d) list of Water Quality limited Segments published by the RWQCB, there are currently no TMDLs established for Batiquitos Lagoon or Carlsbad. Encinitas Creek however is listed as Impaired with phosphorus with an estimated size affected of 3 miles. The source is unknown and it is unclear what reach ofthe creek is affected. 3d. Beneficial uses of receiving water The beneficial uses for the hydrologic unit are indicated in Table 2-2 and 2-3 and described in detail below. This information comes from the Water Quality Control Plan for the San Diego Basin. Table 2-2. BENEFICIAL USES OF INLAND SURFACE WATERS BENEFICIAL USE Hydrologic P F R R B W c W R S In land Surface Waters Unit Basin M A 1 N D R G R P E E 1 A 0 1 A p Number U N G R 1 N D 0 W R S 0 w c c 0 R L L R W c H 0 w 1 2 L M D D E N San IVIarcos Creek Watershed Batiquitos Lagoon 4.51 See Coast Water -Table 2-3 San Marcos Creek 4.52 + • • • • • unnamed intermittent streams 4.53 + • • • • • San Marcos Creek 4.51 + • • • • • Encinitas Creek 4.51 + • • • • • + Excepted from IVlUN ' Waterbodies are listed multiple times if they cross hydrologic area or sub area boundaries. • Existing Beneficial Use ^ Beneficial use designations apply to all tributaries to the indicated waterbody, if not listed separately. Table 2-3. BENEFICIAL USES OF COASTAL WATERS BENEFICIAL USE Hydrologic 1 N R R C B E W R M A M S W S H Coastal Waters Unit Basin N A E E 0 1 S 1 A A Q 1 P 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 Batiquitos Lagoon • • • • • • • • • Beneficial Uses of Inland Surface Waters MUN - Municipal and Domestic Supply: Includes uses of water for community, military, or individual water supply systems including, but not limited to, drinking water supply. AGR - Aquaculture: Includes the uses of water for aquaculture or mariculture operations including, but not limited to, propagation, cultivation, maintenance, or harvesting of aquatic plants and animals for human consumption or bait purposes. REC 1 -Contact 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. I:\001017\_CommerciaI\Stoimwater\SWMP\LCTS SWMP - CommerciaI_City.doc La Costa Town Square Commercial SWMP boating, tide pool and marine life study, hunting, sightseeing, or aesthetic enjoyment in conjunction with the above activities. WARM - Warm Freshwater Habitat: Includes uses of water that support warm water ecosystems including, but not limited to, preservation or enhancement of aquatic habitats, vegetation, fish, or wildlife, including invertebrates. 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. Beneficial Uses of Coastal Waters REC 1 - See Beneficial Uses of Inland Surface Waters above REC 2 - See Beneficial Uses of Inland Surface Waters above BIOL - Preservation of Biological Habitats of Special Significance: Includes uses of water that support designated areas or habitats, such as established refuges, parks, sanctuaries, ecological reserves, or Areas of Special Biological Significance (ASBS), where the preservation or enhancement of natural resources requires special protection. 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 - See Beneficial Uses of Inland Surface Waters above 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. 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. 7 I:\001017\_Commercial\Stormwater\SWMP\LCTS SWMP - Commercial_City.doc La Costa Town Square Commercial SWMP 3e. Summarize primary pollutants of concern The primary pollutants of concern for this project are Sediment, Nutrients, Heavy Metals, Organic Compounds, Trash & Debris, Oxygen Demanding Substances, Oil & Grease, Bacteria & Viruses, and Pesticides. The extensive use of bioretention treatment control 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. I;\001017\_Commercial\Stortnwater\SWMP\LCTS SWMP - Commercial_City.doc La Costa Town Square Commercial SWMP 4. SOURCE CONTROL MEASURES 4a. Description of site activities and potential sources of pollutants Activities and potential pollutant sources associated with this site include: On-site storm drain inlets Interior floor drains Landscape and outdoor pesticide use Pools, spas, ponds, decorative fountains, and other water features Food service Refuse areas Outdoor storage of equipment or materials Fuel Dispensing Areas Loading Docks Fire Sprinkler Test Water Miscellaneous Drain or Wash Water consisting of: o Boiler drain lines o Condensate drain lines o Rooftop equipment o Drainage sumps o Roofing, gutters, and trim Plazas, sidewalks, and parking lots 4b. Stormwater Pollutant Sources and Source Controls The following table identifies permanent and operational source control measures for the project site as outlined in Appendix 1, Stormwater Pollutant Sources and Source Control checklist in the City's SUSMP: Potential Source of Runoff Pollutants Permanent Source Control BIVIPs Operational Source Control BIVIPs On-site storm Drain Inlets Mark all inlets with the words "No Dumping! Flows to Bay" or similar. Maintain and periodically repaint or replace inlet markings. Provide stormwater pollution prevention information to 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 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." Provide stormwater pollution I:\001017\_Commercial\Stormwater\SWMP\LCTS SWMP - Commercial_City.doc La Costa Town Square Commercial SWMP Potential Source of Runoff Pollutants Permanent Source Control BMPs Operational Source Control BIVIPs prevention information to site owners, lessees, or operators. Interior Floor Drains Interior floor drains wili be plumbed to sanitary sewer Inspect and maintain drains to prevent blockages and overflow Landscape and Outdoor Pesticide Use Final landscape plans will accomplish all ofthe following: • Preserve existing native trees, shrubs, and ground cover to the maximum extent possible. • Design landscaping to minimize irrigation and runoff, to promote surface infiltration where appropriate, and to minimize the use of fertilizers and pesticides that can contribute to stormwater 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. Pools, Spas, Ponds, Decorative Fountains, and Other Water Features • Water features 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 Refuse Areas State that signs will be posted on or near dumpsters with the words "Do not dump hazardous materials here" or similar. Maintain landscaping using minimum or no pesticides. See applicable operational BMPs in Fact Sheet SC-41, "Building and Grounds Maintenance," in the CASQA Stormwater Quality Handbooks at www.cabmphandbooks.com Provide IPM information to new owners, lessees and operators. See applicable operational BMPs in Fact Sheet SC-72, "Fountain and Pool Maintenance," in the CASQA Stormwater Quality Handbooks at www.cabmphandbooks.com Provide adequate number of receptacles. Inspect receptacles regularly; 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 SC-34, "Waste Handling and Disposal" in the CASQA Stormw/ater Quality Handbooks at www.cabmphandbooks.com Outdoor Storage of Equipment or IVIaterials. • 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 and compliance with the requirements of local Hazardous • See the Fact Sheets SC-31, "Outdoor Liquid Container Storage" and SC-33, "Outdoor Storage of Raw Materials " in the CASQA Stormwater Quality Handbooks at www.cabmphandbooks.com 10 I:\001017\_Commercial\Storaiwater\SWMP\LCTS SWMP - Conimercial_City.doc La Costa Town Square Commercial SWMP Potential Source of Runoff Pollutants Permanent Source Control BIVIPs Operational Source Control BMPs Materials Programs for: • Hazardous Waste Generation • Hazardous Materials Release Response and Inventory • California Accidental Release (CalARP) • Aboveground Storage Tank • Uniform Fire Code Article 80 Section 103(b) & (c) 1991 • Underground Storage Tank Fuel Dispensing Areas • The property owner shall dry sweep the fueling area routinely. • See the Business Guide Sheet, "Automotive Service—Service Stations" in the CASQA Stormwater Quality Handbooks at www.cabmphandbooks.com Loading Docks • Bio-clean trench drain insert to be installed in each loading dock trench drain. • Move loaded and unloaded items indoors as soon as possible. • See Fact Sheet SC-30, "Outdoor Loading and Unloading," in the CASQA Stormwater Quality Handbooks at www.cabmphandbooks.com Fire Sprinkler Test Water • Obtain a permit from the Leucadia Wastewater District to provide a means to drain fire sprinkler test water to the sanitary sewer. • See the note in Fact Sheet SC-41, "Building and Grounds Maintenance," in the CASQA Stormwater Quality Handbooks at www.cabmphandbooks.com Miscellaneous Drain or Wash Water: • Boiler drain lines • Condensate drain lines • Rooftop equipment • Drainage sumps • Roofing, gutters, and trim • Boiler drain lines shall be directly or indirectly connected to the sanitary 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 runoff will not occur. Condensate drain lines may not discharge to the storm drain system. • Rooftop mounted equipment with potential to produce pollutants shall be roofed and/or have secondary 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 runoff. Plazas, Sidewalks, and Parking Lots. • Plazas, sidewalks, 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 11 I:\001017\_Commercial\Stomiwater\SWMP\LCTS SWMP - Coramercial_City.doc La Costa Town Square Commercial SWMP Potential Source of Runoff Pollutants Permanent Source Control BMPs Operational Source Control BMPs storm drain system. Wash water containing any cleaning agent or degreaser shall be collected and discharged to the sanitary sewer and not discharged to a storm drain. 12 I:\001017\_Commercial\Stonnwater\SWMP\LCTS SWMP - Commercial_City.doc La Costa Town Square Commercial SWMP 5. LOW IMPACT DEVELOPMENT (LID) DESIGN STRATEGIES The LID strategies applicable to this commercial development project include dispersing runoff to adjacent pervious surfaces and draining to Integrated Management Practices (IMPs). The entire site has been divided into 98 drainage areas comprising of discrete Drainage Management Areas (DMAs) based on surface type. These areas were used to determine which LID strategy alternative best applies to that specific drainage area. The Integrated Management Practice (IMP) approach was used on 98 DMAs to meet both treatment and/or hydromodification flow control objectives. A proposed detention basin along La Costa Avenue, west of Calle Timiteo, will provide hydromodification for the DMAs without hydromodification. See Section 8 for further hydromodification design. Attachment 2, BMP Plan Exhibit, depicts each of these strategies and locations of treatment, hydromodification and flow-control facilities. 13 I:\001017\_Commercial\Stonnwater\SWMP\LCTS SWMP - Commercial_City.doc La Costa Town Square Commercial SWMP 6. INTEGRATED MANAGEMENT PRACTICES (IMP's) 6a. Selection process for IMP's According to Table 2-2 ofthe 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 of 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 engineered 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 and/or limit flow using control through hydromodification. 6b. Sizing factors for IMP's 1) Higher flow threshold determination The hydromodification screening analysis done by Chang Consultants demonstrates that the peak flows and durations from the site can be mitigated using a flow threshold of 0.5Q2 (high flow threshold and low susceptibility). 2) HMP Decision Matrix IMP facilities were sized using the Decision Matrices in Figures 2-2 in Section 8, Hydromodification. 6c. Geotechnical recommendation on soil infiltration rates IMP facilities were chosen that do not drain through native soil, as soil infiltration rates were anticipated to be low. 6d. Infiltration calculations Self-retaining areas were not utilized on this site, as soil infiltration rates were anticipated to be low. 14 I;\001017\_Commercial\Stormwater\SWMP\LCTS SWMP - CommerciaLCity.doc La Costa Town Square Commercial SWMP 7. TREATMENT CONTROL BMP's Water quality treatment will be accomplished through the use of bioretention facilities. Urban Green® units and vegetated swales. Bioretention basin areas were sized for both treatment and hydromodification except where noted as treatment only. See Carlsbad Drawing 409-4C for details and specifications for bioretention basins (Attachment 7). Urban Green® details and specifications are in Attachment 6. 15 I:\001017\_Commercial\Stormwater\SWMP\LCTS SWMP - Commercial_City.doc La Costa Town Square Commercial SWMP 8. HYDROMODIFICATION Sa. Higher Flow Threshold Determination The hydromodification screening analysis demonstrates that the peak flows and durations from the site can be mitigated using a flow threshold of 0.5Q2 (high flow threshold and low susceptibility). See Figure 2.2 below. Consult with Geotechnical Engineer; . Size LID and Flow Range o Redesign LIDorBMP YES YES .MP Facilities for O.IQjtoQio? YES End of fleclslon Malrix FIGURE 2-2. Mitigation Criteria and Implementation 16 I:\001017\_Commercial\Stonnwater\SWMP\LCTS SWMP - Coramercial_City,doc La Costa Town Square Commercial SWMP 8b. Continuous Simulation Model A continuous simulation model was not considered for this project 8c. Tabulation of Flow-control Facility Sizes and Design Criteria The Son Diego BMP Sizing Calculator LID Sizer was used to size IMPs within the DMAs. See Attachment 4 for summary of the BMP Calculator report results. DMA No's. 27R, 28, 32, 38, 39, 41, 42, 44, 45, 49, 50, 53, 54, 56, 59, 60, 65, 80, 83 and 84 have no orifice controls designed into their IMP because hydromodification control is being incorporated into the detention basin along La Costa Avenue, west of Calle Timiteo. See Carlsbad Drawing 409-4C for details and specifications for bioretention basins. 8d. Incorporating Hydromodification control into the Detention Basin The detention basin is designed to provide hydromodification for DMA No's. 27R, 28, 32, 38, 39, 41, 42, 44, 45, 49, 50, 53, 54, 56, 59, 60, 65, 80, 83 and 84 while also attenuating the peak 100- year flow from Basin 2. The Son Diego BMP Calculator Pond Sizer was used to size the detention basin and orifices for hydromodification flow. See Attachment 8 for hydromodification design forthe detention basin. The hydromodification flows from the detention basin will be controlled by two pipes (a 5-inch pipe at an invert of 266.19 foot elevation, and a 12-inch pipe at an invert of 268.79 foot elevation) through a 3.0-foot high concrete weir surrounding the 30-inch outlet pipe. The bottom 3.0 feet of the detention basin will serve as temporary storage for the DMAs without hydromodification. The maximum storage corresponding to the hydromodification flow threshold is 0.924 ac-ft (40,249 ft^). Flows greater than the hydromodification flow threshold will over top the 20-foot long concrete weir. The detention basin analysis indicates that the peak 100-year flow is attenuated from 139.1 cfs to 54.9 cfs. The maximum storage volume used is 1.663 ac-ft (72,440 ft^), with a maximum water surface elevation at 6.3 feet from the bottom ofthe detention basin. 17 I:\001017\_Commercial\Stonnwater\SWMP\LCTS SWMP - Commercial_City.doc La Costa Town Square Commercial SWMP DOCUMENTATION OF STORMWATER DESIGN 9a. Hydrology maps Attachment 2, BMP Plan Exhibit, depicts the treatment controls, low impact design and source control BMPs. Attachment 3, DMA Map Exhibit shows the boundaries of each drainage area draining to each IMP. 9b. LID BMP Sizing Calculator Attachment 5 includes the BMP Calculator Report Results for each IMP considered. The report calculates the plan area, ponding volume, storage volume, and orifice flow and size for each IMP considered. 18 I:\001017\_Commercial\Stonnwater\SWMP\LCTS SWMP - Commercial_City.doc La Costa Town Square Commercial SWMP 10. BMP FACILITY MAINTENANCE REQUIREMENTS 10a. Ownership and responsibility of maintenance of BMP's The Owner and Developer 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." Include in the CC&R's requirements for maintenance, operation and compliance with the SUSMP. 10b. Summary of maintenance requirements 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 ofthe 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. • Observe the surface of bioretention facility soil for uniform percolation throughout. If portions ofthe bioretention facility do not drain within 24 hours after the end ofa storm, the soil should be tilled and replanted. 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 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. 19 I:\001017\_Commercial\Stonnwater\SWMP\LCTS SWMP - Commercial_City.dcc La Costa Town Square Commercial SWMP 11. SWMP CERTIFICATION STATEMENTS 11a. Preparer's statement The selection, sizing, and preliminary design of stormwater treatment and other control measures in this plan meet the requirements of Regional Quality Control Board Order R9-2007-0001 and subsequent amendments. NAME --Tis^ CUi=>««»cct_: lib. Owner's statement DATE The selection, sizing, and preliminary design of stormwater treatment and other control measures in this plan meet the requirements of Regional Quality Control Board Order R9-2007-0001 and subsequent amendments. NAME DATE 20 I:\001017\_Comraercial\Storrawater\SWMP\LCTS SWMP - ConimerciaLCity.doc ATTACHMENT 1 STORMWATER STANDARDS QUESTIONNAIRE CITY OF CARLSBAD STORM WATER COMPUANCE FORM - TIER 3 CONSTRUCTION SWPPP E-31 Development Service.': Land Development Engineering 1635 Faraday Avenue 760-602-2750 www.carlsbadca.gov I am applying to tha City of Carisbad for the following type of construction pemiit(s): E^Grading Permit • Building Permit • Right-of-Way Permit 6/ CSIRECT. ™ ™^ ^^"^ °'' ''^^^ ™T THE ABOVE CHECKED STATEMENTS ARE TRUE AND PERMIT FOR CONSTRUCTION ACTIVITIES - WATER QUALIT^ORnFRwnJo^? GENERAL TSSTNCT/H^ES.^' ™^ ^ONS^'-C^^^^^^^^ Lr^T^rH^fAS SrE^G^oS^Ny^^^^^^ 3 CONSTRUCTION INTENTION (NOl). AN APPROPRIATE RLlS^ FEE AND^^^^ ^ "^^^'^^ STATE WASTE DISCHARGER'S IDENTIFIcIS-|ON ^^3^^!^^ ^^D RECEIVE A REQUESTED CONSTRUCTION PEISITJS) ^ ^ ^ ^'^^^^ ^'^ ISSUANCE OF THE ABOVE ACTIVITIES UNTIL THE CONSTRUCTION SI^^IO^:^^^^ l^£..°y?^T 0N_0F THE CONSTRUCTION /^fy>^ifuc7f#i uuuitfiauuft ana Address: signature tsax Assessor's Parcel Number(s): 5L0--i - CJ50-70 Applicant Name: Applicant Title: (lfij^.\ \ . Yh X. Applicant Signature: Date: ' ^-^^ City Concurrence: Yes No City Concurrence: Date; 1 f ^ Project ID; E-31 Page 1 of 1 REV 4/30/10 CITY OF CARLSBAD STORM WATER STANDARDS QUESTIONNAIRE E-34 Qeyelooment '^^rvjirSLl land Development Engineering 1635 Faraday Avenue 750-602-2750 www.carlsbadca.gov ISECTION 1 Does your project meet oneor more of the following criteria: ~ — -— — . ' ^ — -vwco oyij. requirements and hydror„odr»cation reouirempn"!: '^^^""S"' BMP and numeric sizing criieria N/ ] E-34 Page 1 of 3 REV 1/14/11 <^ CITY OF CARLSBAD STORM WATER STANDARDS QUESTIONNAIRE E-34 Land Development Engineering 1635 Faraday Avenue 760-502-2750 www.carlsbadca.gov 7. ^. " — ' ""K^ocu lu Ufuan n-r • , Ulnar veniCIBS areas designated as presages or Iheir eauivalenr fnL, ft, » ^o'"' (Water Quality Conlrol WanlS?*^ a'^endments): water bodies 4 Pollulant-generaHng Development Proiects ara iho^a r o ou,n wim pen/ious surfaces or jf ihey sheet (low to INSTRUCTIONS: Section 1 Reaulta; ~ ~" ' —— . E-34 Page 2 of 3 REV 1/14/11 ^ CITY OF CARLSBAD << STORM WATER STANDARDS QUESTIONNAIRE E-34 Develooment Servin^^ Land Development Engineering 1635 Faraday Avenue 760-602-2750 www.carlsbadca.gov SECTION 2 SIGNIFICANT REDEVELOPMENT INSTRUCTIONS; Complete the questions below regarding your project '• Sei """^°^ " "^^^ '-"^ ^"'^ considered a Pollutant-generating Deve.oomenT YES INSTRUCTIONS: If you answered NO please proceed to question 2." S:rpL?se'ar^^^^^^^ - " thn rrninrf rnilni,iili „ ,1 i ii,, i , "'=^^'-°^'^^NT PROJECT req.ilrements- box in Sectir^nho..,.. NO INSTRUCTIONS: If you answered YES, please proceed to question 3 " INSTRUCTIONS: If you answered NO. then proceed to question 4. developed property or will your project belS wlthS fe^^^^^^^^ surfaces on existing more of impervious surface or (2) increases impervious Lrfa^ ot^^fhP nroLrt?, f 0 create 2600 square feet or existing impervious surfaces indudes any activ thS is nol oTrl of rout/r^l^^^ ""T "'f" Replacement of removed, exposing underlying soil during constrvcUon maintenance where impervious material(s) are SUSMP 10 W out if SUSMP ™,ulr.m»«. apply » ,„„r ^I^CSKSI ^SpSSi " ' for definifion see Footnote 4 on page 2 " ~~ ~ —— —- • now control (hydromodification) requireme'n.s'may appl^ to mTprSl^T °' ^PP'-«°n. I understand ^^^^^SSSSS!^^ per .e Applicant Infomiation and Signature Box ^ ^—— Address: Rgncho Santa Fe & La Costa Av© Assessor's Parcel Number(s): 223-050-70 Applicant Name: Applicant Title: Applicant Signature: Date: " -f^ ~ Thb Box far CUy Usa Only City Concurrence: 1 yEg NO 1 hr— 1 Uy: 1 _ 1 1 uata: — j f roject ID: —— E-34 Page 3 of 3 REV 1/14/11 ATTACHMENT 2 BMP PLAN EXHIBIT ATTACHMENT 3 DMA MAP EXHIBIT ATTACHMENT 4 SUMMARY OF BMP CALCULATOR REPORT RESULTS La Costa Town Square - Commercial Site Summary of IMP (UD BMP) Calculations Notes: BMP description used for identification, which corresponds to description from BMP Calculator. Numerical value of BMP description corresponds to Drainage Area value shown of SWMP Exhibit, e.g. "DAI" equals "1". (TH) = Treatment and Hydromodification (TO) = Treatment Only WQFR = Water Quality Flow Rate for Urban Green Sizing BMP DESCRIPTION TYPE LID BMP PLAN AREA (sqft) VOLUME 1 (eft) VOLUME 2 (eft) ORIFICE FLOW (cfs) ORIFICE SIZE (ineh) DAI BIORETENTION (TH) 556 463 333 0.032 0.9 DA2 BIORETENTION (TH) 585 487 351 0.048 1.0 Ponding depth for "Volume 2" equals 30 inches to obtain 487 eft DA3 BIORETENTION (TH) 73 61 43 0.005 0.4 DA4 NOT USED n/a n/a n/a n/a n/a DAS BIORETENTION (TH) 534 445 320 0.059 1.0 DA6 BIORETENTION (TH) 84 70 50 0.015 0.6 DA7 BIORETENTION (TH) 198 165 118 0.011 0.5 DA8A BIORETENTION (TH) 172 144 103 0.010 0.5 DA8B BIORETENTION (TH) 294 245 176 0.016 0.6 DA9 BIORETENTION (TH) 151 126 90 0.009 0.5 DAIO BIORETENTION (TH) 113 94 67 0.006 0.4 DA4A BIORETENTION (TH) 314 261 188 0.022 0.7 l:\001017\_Commercial\Stormwater\SWMP\BMP Sizing Calculator\LCTS - BMP CALCULATOR\BMP-CALC-USE\BMP WQ Sizing-Adj-Final La Costa Town Square - Commercial Site Summary of IMP (LID BMP) Calculations Notes: BMP description used for identification, which corresponds to description from BMP Calculator. Numerical value of BMP description corresponds to Drainage Area value shown of SWMP Exhibit, e.g. "DAI" equals "1". (TH) = Treatment and Hydromodification (TO) - Treatment Only WQFR = Water Quality Flow Rate for Urban Green Sizing BMP DESCRIPTION TYPE LID BMP PLAN AREA (sqft) VOLUME 1 (eft) VOLUME 2 (eft) ORIFICE FLOW (cfs) ORIFICE SIZE (inch) DA4B FUTURE 4' X 4' URBAN GREEN (TH) Volume Required for Hydromodi 465 cf, WQFR = 0.0 fication = 16 0.006 0.3 DA4C FUTURE 4' X 6' URBAN GREEN (TH) Volume Required for Hydromodification = 1280 cf, WQFR = 0.044 0.016 0.5 DAll BIORETENTION (TH) 194 161 116 0.011 0.5 DA12 BIORETENTION (TH) 1131 943 678 0.064 1.0 DA13 BIORETENTION (TH) 377 314 226 0.042 1.0 DA14A BIORETENTION (TH) 243 203 146 0.021 0.7 DA14B BIORETENTION (TH) 158 131 94 0.013 0.6 DAIS BIORETENTION (TH) 142 118 85 0.011 0.5 DA16 NOT USED n/a n/a n/a n/a n/a DA17 BIORETENTION (TH) 142 118 85 0.011 0.5 DA18 BIORETENTION (TH) 1104 920 662 0.066 1.0 DA19 4' X 4' URBAN GREEN & VAULT (TH) Volume Required for Hydromodification 1217 cf, WQFR = 0.033 0.013 0.5 l:\001017\_Commercial\Stormwater\SWMP\BMP Sizing Calculator\LCTS - BMP CALCULATOR\BMP-CALC-USE\BMP WQ Sizing-Adj-Final La Costa Town Square - Commercial Site Summary of IMP (LID BMP) Calculations Notes: BMP description used for identification, which corresponds to description from BMP Calculator. Numerical value of BMP description corresponds to Drainage Area value shown of SWMP Exhibit, e.g. "DAI" equals "1". (TH) = Treatment and Hydromodification (TO) = Treatment Only j ' ? . . . WQFR = Water Quality Flow Rate for Urban Green Sizing BMP DESCRIPTION TYPE LID BMP PLAN AREA (sqft) VOLUME 1 (eft) VOLUME 2 (eft) ORIFICE FLOW (cfs) ORIFICE SIZE (ineh) DA20 BIORETENTION - VAULT (TO) / 1090 3271 0 0.048 0.9 DA21A BIORETENTION (TH) 95 79 57 0.005 0.3 DA21B BIORETENTION (TH) 158 131 94 0.013 0.6 DA21C BIORETENTION (TH) 172 143 103 0.009 0.5 DA21D BIORETENTION (TH) 202 168 121 0.011 0.5 DA21E BIORETENTION (TH) 156 130 94 0.008 0.5 DA22 BIORETENTION (TH) 230 192 138 0.013 0.6 DA23 BIORETENTION (TH) 2030 1693 1218 0.120 2.0 DA24 BIORETENTION (TH) 584 487 350 0.041 1.0 DA25 BIORETENTION (TH) 339 283 203 0.022 0.8 DA26 BIORETENTION (TH) 4080 3403 2448 0.232 3.0 DA27 BIORETENTION - VAULT (TH) 2757 8273 0 0.243 2.0 DA27R 1.07 acres drains to Detention Basin for Hydromodification Flow Control l:\001017\_Commercial\Stormwater\SWMP\BMP Sizing Calculator\LCTS - BMP CALCULATOR\BMP-CALC-USE\BMP WQ Sizing-Adj-Final La Costa Town Square - Commercial Site Summary of IMP (LID BMP) Calculations Notes: BMP description used for identification, which corresponds to description from BMP Calculator. Numerical value of BMP description corresponds to Drainage Area value shown of SWMP Exhibit, e.g. "DAI" equals "1". (TH) - Treatment and Hydromodification (TO) = Treatment Only WQFR = Water Quality Flow Rate for Urban Green Sizing BMP DESCRIPTION TYPE LID BMP PLAN AREA (sqft) VOLUME 1 (eft) VOLUME 2 (eft) ORIFICE FLOW (efs) ORIFICE SIZE (inch) OA28 6'X 6'URBAN GREEN (TO) Hydromodification Flow Contro into Detention Bas 1 Incorporated n WQFR = 0.074 DA29 NOT USED n/a n/a n/a n/a n/a DA30A BIORETENTION (TH) 263 219 158 0.014 0.6 DA30B BIORETENTION (TH) 158 131 94 0.013 0.6 DA31 BIORETENTION (TH) 180 150 108 0.006 0.4 DA32 4'X4'URBAN GREEN-TO Hydromodification flow control incorporated into Detention Basin WQFR = 0.019 DA33 BIORETENTION (TH) 343 286 205 0.021 0.7 DA34 BIORETENTION (TH) 58 49 35 0.003 0.3 DA35 BIORETENTION (TH) 275 229 165 0.017 0.6 DA36 BIORETENTION (TH) 206 172 124 0.011 0.5 DA37 BIORETENTION (TH) 278 231 166 0.009 0.5 DA38 4'X 8'URBAN GREEN (TO) Hydromodification Flow Contro into Detention Basi Incorporated n WQFR - 0.073 l:\001017\_Commercial\Stormwater\SWMP\BMP Sizing Calculator\LCTS - BMP CALCULATOR\BMP-CALC-USE\BMP WQ Sizing-Adj-Final La Costa Town Square - Commercial Site Summary of IMP (LID BMP) Calculations Notes: BMP description used for identification, which corresponds to description from BMP Calculator. Numerical value of BMP description corresponds to Drainage Area value shown of SWMP Exhibit, e.g. "DAI" equals "1". (TH) = Treatment and Hydromodification (TO) = Treatment Only WQFR - Water Quality Flow Rate for Urban Green Sizing BMP DESCRIPTION TYPE LID BMP PLAN AREA (sqft) VOLUME 1 (eft) VOLUME 2 (eft) ORIFICE FLOW (cfs) ORIFICE SIZE (inch) DA39 4'X 6'URBAN GREEN (TO) Hydromodification flow control incorporated into Detention Basin WQFR = 0.042 DA40 NOT USED n/a n/a n/a n/a n/a DA41 ^ BIORETENTION (TO) 393 1179 0 n/a n/a (Hydromodification Flow Control Incorporated into Detention Basin DA42 71 BIORETENTION-VAULT (TO) 289 868 0 n/a n/a Hydromodification Flow Control Incorporated into Detention Basin DA43 BIORETENTION (TH) 178 148 107 0.100 0.5 DA44 ^ BIORETENTION (TO) 535 1605 0 n/a n/a L Hydromodification flow control incorporated into Detention Basin DA45 4'X 4'URBAN GREEN (TO) Hydromodification flow control incorporated into Detention Basin WQFR = 0.027 DA46A BIORETENTION (TH) 1139 950 683 0.094 1.0 DA46B BIORETENTION (TH) 1198 999 719 0.075 1.0 l:\001017\_Commercial\Stormwater\SWMP\BMP Sizing Calculator\LCTS - BMP CALCULATOR\BMP-CALC-USE\BMP WQ Sizing-Adj-Final La Costa Town Square - Commercial Site Summary of IMP (LID BMP) Calculations Notes: BMP description used for identification, which corresponds to description from BMP Calculator. Numerical value of BMP description corresponds to Drainage Area value shown of SWMP Exhibit, e.g. "DAI" equals "1". (TH) = Treatment and Hydromodification (TO) = Treatment Only WQFR - Water Quality Flow Rate for Urban Green Sizing BMP DESCRIPTION TYPE LID BMP PLAN AREA (sqft) VOLUME 1 (eft) VOLUME 2 (eft) ORIFICE FLOW (cfs) ORIFICE SIZE (ineh) DA47 BIORETENTION (TH) 258 215 154 0.015 0.6 DA48A BIORETENTION (TH) 263 219 158 0.014 0.6 DA48B BIORETENTION (TH) 124 103 74 0.007 0.4 0A49 4'X 4'URBAN GREEN (TO) Hydromodification Flow Control Incorporated into Detention Basin WQFR = 0.027 DA50 4'X 4'URBAN GREEN (TO) Hydromodification Flow Control Incorporated into Detention Basin WQFR = 0.016 DA51 NOT USED n/a n/a n/a n/a n/a DA52 NOT USED n/a n/a n/a n/a n/a DA53 4' X 6' URBAN GREEN (TO) Hydromodification flow control incorporated into Detention Basin WQFR =0.032 DA54 4'X4' URBAN GREEN (TO) Hydromodification flow control incorporated into Detention Basin WQFR=0.030 DASS BIORETENTION (TH) 123 102 1 73 0.007 1 0.4 l:\001017\_Commercial\Stormwater\SWMP\BMP Sizing Calculator\LCTS - BMP CALCULATOR\BMP-CALC-USE\BMP WQ Sizing-Adj-Final La Costa Town Square - Commercial Site Summary of IMP (LID BMP) Calculations Notes: BMP description used for identification, which corresponds to description from BMP Calculator. Numerical value of BMP description corresponds to Drainage Area value shown of SWMP Exhibit, e.g. "DAI' equals "1". (TH) = Treatment and Hydromodification (TO) = Treatment Only WQFR = Water Quality Flow Rate for Urban Green Sizing BMP DESCRIPTION TYPE LID BMP PLAN AREA (sqft) VOLUME 1 (eft) VOLUME 2 (eft) ORIFICE FLOW (efs) ORIFICE SIZE (ineh) DA56 BIORETENTION (TO) 811 2435 0 n/a n/a Hydromodification flow control incorporated into Detention Basin DA57 BIORETENTION (TH) 148 123 88 0.008 0.4 DA58A BIORETENTION (TH) 126 105 75 0.007 0.4 DA58B BIORETENTION (TH) 215 179 129 0.012 0.5 DA58C BIORETENTION (TH) 304 254 182 0.017 0.7 DA59 4' X 12' URBAN GREEN (TO) Hydromodification Flow Control Incorporated into Detention Basin WQFR = 0.110 DA60 4'X 4'URBAN GREEN (TO) Hydromodification Flow Control Incorporated into Detention Basin WQFR = 0.012 DA61A BIORETENTION (TH) 162 135 97 0.010 0.5 DA61B BIORETENTION (TH) 304 254 182 0.019 0.7 DA62 BIORETENTION (TH) 607 506 364 0.077 1.0 DA63 BIORETENTION (TH) 219 183 131 0.033 0.9 :\001017\_Commercial\Stormwater\SWMP\BMP Sizing Calculator\LCTS - BMP CALCULATOR\BMP-CALC-USE\BMP WQ Sizing-Adj-Final La Costa Town Square - Commercial Site Summary of IMP (LID BMP) Calculations Notes: BMP description used for identification, which corresponds to description from BMP Calculator. Numerical value of BMP description corresponds to Drainage Area value shown of SWMP Exhibit, e.g. "DAI" equals "1". (TH) = Treatment and Hydromodification (TO) = Treatment Only WQFR = Water Quality Flow Rate for Urban Green Sizing BMP DESCRIPTION TYPE LID BMP PLAN AREA (sqft) VOLUME 1 (eft) VOLUME 2 (eft) ORIFICE FLOW (efs) ORIFICE SIZE (inch) DA64 BIORETENTION (TH) 547 456 328 0.045 1.0 DA65 4'X8' URBAN GREEN (TO) Hydromodification Flow Control Incorporated into Detention Basin WQFR = 0.046 DA66A BIORETENTION (TH) 439 366 263 0.026 0.8 DA66B BIORETENTION (TH) 223 186 134 0.0.013 0.6 DA67A BIORETENTION (TH) 344 287 206 0.012 0.6 DA67B BIORETENTION (TH) 331 276 198 0.010 0.5 DA68A BIORETENTION (TH) 283 236 170 0.017 0.7 DA68B BIORETENTION (TH) 261 217 156 0.014 0.6 DA69 BIORETENTION (TH) 426 355 255 0.033 0.9 DA70A BIORETENTION (TH) 677 564 406 0.026 0.8 DA70B BIORETENTION (TH) 2356 1965 1413 0.194 2.0 DA71 BIORETENTION (TH) 197 164 118 0.016 0.6 l:\001017\_Commercial\Stormwater\SWMP\BMP Sizing Calculator\LCTS - BMP CALCULATOR\BMP-CALC-USE\BMP WQ Sizing-Adj-Final La Costa Town Square - Commercial Site Summary of IMP (LID BMP) Calculations Notes: BMP description used for identification, which corresponds to description from BMP Calculator. Numerical value of BMP description corresponds to Drainage Area value shown of SWMP Exhibit, e.g. "DAI" equals "1". (TH) = Treatment and Hydromodification (TO) = Treatment Only WQFR = Water Quality Flow Rate for Urban Green Sizing BMP DESCRIPTION TYPE UD BMP PLAN AREA (sqft) VOLUME 1 (eft) VOLUME 2 (eft) ORIFICE FLOW (cfs) ORIFICE SIZE (inch) DA72 BIORETENTION (TH) 170 142 102 0.009 0.5 DA73 BIORETENTION (TH) 91 76 54 0.006 0.4 DA74 BIORETENTION (TH) 398 332 239 0.002 0.8 DA75 BIORETENTION (TH) 476 397 286 0.026 0.8 DA76 BIORETENTION (TH) 3132 2612 1879 0.175 2.0 DA77 NOT USED n/a n/a n/a n/a n/a DA78 BIORETENTION (TH) 2139 1784 1283 0.134 1.0 DA79 BIORETENTION (TO) 1027 3083 0 0.051 n/a DA80 6' X 10' URBAN GREEN (TO) Hydromodification Flow Control Incorporated into Detention Basin WQFR = 0.071 DA81 BIORETENTION (TH) 690 575 414 0.062 1.0 DA82 BIORETENTION (TH) 89 74 53 0.005 0.3 l:\001017\_Commercial\Stormwater\SWMP\BMP Sizing Calculator\LCTS - BMP CALCULATOR\BMP-CALC-USE\BMP WQ Sizing-Adj-Final La Costa Town Square - Commercial Site Summary of IMP (LID BMP) Calculations Notes: BMP description used for identification, which corresponds to description from BMP Calculator. Numerical value of BMP description corresponds to Drainage Area value shown of SWMP Exhibit, e.g. "DAI" equals "1". (TH) = Treatment and Hydromodification (TO) - Treatment Only WQFR = Water Quality Flow Rate for Urban Green Sizing BMP DESCRIPTION TYPE LID BMP PLAN AREA (sqft) VOLUME 1 (eft) VOLUME 2 (eft) ORIFICE FLOW (cfs) ORIFICE SIZE (ineh) DA83 4'X8' URBAN GREEN (TO) Hydromodification Flow Control Incorporated into Detention Basin WQFR = 0.039 DA84 4' X 8' URBAN GREEN (TO) Hydromodification Flow Control Incorporated into Detention Basin WQFR = 0.071 l:\001017\_Commercial\Stormwater\SWMP\BMP Sizing Calculator\LCTS - BMP CALCULATOR\BMP-CALC-USE\BMP WQ Sizing-Adj-Final ATTACHMENT 5 BMP CALCULATOR REPORT RESULTS Project Summary Project Name LA COSTA TOWN SQUARE Project Applicant PDC Jurisdiction City of Carlsbad Parcel (APN) 223-060-32 Hydrologic Unit Carlsbad Compliance Basin Summary Basin Name: LCTS Receiving Water: Rainfall Basin Oceanside •Wean Annual Precipitation (inches) 13.3 Project Basin Area (acres): 43.10 Watershed Area (acres): 43.10 SCCWRP Lateral Channel Susceptiblity (H, M, L): Low (Lateral) SCCWRP Vertifical Channel Susceptibiity (H, M, L): Low (Vertical) Overail Channel Susceptibility (H, M, L): LOW Lower Flow Threshold (% of 2-Year Flow): 0.5 Drainage Management Area Summary ID Type BMP ID Description Area (ac) Pre-Project Cover Post Surface Type Drainage Soil Slope 28288 Drains to LID BMP 1 DAI-AC 0.23 Pervious (Pre) Concrete or asphalt Type D (high runoff - day soi... Steep (greater 10%) 28290 Drains to LID BMP 1 DA1-LS 0.14 Pervious (Pre) Landscaping Type D (high runoff - day soi... Steep (greater 10%) 28407 Drains to LID BMP 1 DA1-SW 0.02 Pervious (Pre) Concrete or asphalt Type D (high runoff - day soi... Steep (greater 10%) 28445 Drains to LID BMP 2 DA2-AC 0.23 Pervious (Pre) Concrete or asphalt Type D (high runoff - clay soi... Steep (greater 10%) 28446 Drains to LID BMP 2 DA2-LS 0.14 Pervious (Pre) Landscaping Type D (high runoff - clay soi... Steep (greater 10%) 28447 Drains to LID BMP 2 DA2-SW 0.02 Pervious (Pre) Concrete or asphalt Type D (high runoff - day soi... Steep (greater 10%) LID Facility Summary BIUIP ID Type Description Plan Area (sqft) Volume 1(cft) Volume 2(cft) Orifice Flow (cfs) Orifice Size (inch) BMP 1 Bioretention DAI 556 463 333 0.032 0.9 BMP 2 Bioretention DA2 585 487 351 0.048 1.00 LID Facility Summary Project Summary BMP 6 Bioretention DA6 84 70 50 0.015 0.6 Bioretention DA7 198 165 118 0.011 0.5 j^rt Result Project Summary Project Name LA COSTA TOWN SQUARE - COMMERCIAL Project Applicant PDC Junsdiction City of Cartsbad Parcel (APN) 223-060-32 Hydrologic Unit Carlsbad Compliance Basin Summary Basin Name: LCTS Receiving Water: ENCINITAS CREEK Rainfall Basin Oceanside Mean Annual Precipitation (inches) 13.3 Project Basin Area (acres): 43.10 Watershed Area (acres): 43.10 SCCWRP Lateral Channel Susceptiblity (H, M, L): Low (Lateral) SCCWRP Vertifical Channel Susceptiblity (H, M, L): Low (Vertical) Overall Channel Susceptibility (H, M, L): LOW Lower Flow Threshold (% of 2-Year Flow): 0.5 PaaaJ of2 Drainage Management Area Summary ID Type BMP ID Description Area (ac) Pre-Project Cover Post Surface Type Drainage Soil Slope 27951 Drains to LID BMP 8 DA8A-AC 0.07 Pervious (Pre) Concrete or asphalt Type D (high runoff - clay soi... Steep (greater 10%) 27952 Drains to LID BMPS DABA-LS 0.00 Pervious (Pre) Landscaping Type D (high runoff - clay soi... Steep (greater 10%) 27953 Drains to LID BMP 8 DA8A-SW 0.00 Pen/ious (Pre) Concrete or asphalt Type D (high runoff - clay soi... Steep (greater 10%) 27998 Drains to LID BMP 18 DABB-AC 0.12 Penrious (Pre) Concrete or asphalt Type D (high runoff - clay soi... Steep (greater 10%) 28000 Drains to LID BMP 18 DA8B-SW 0.00 Pen/ious (Pre) Concrete or asphalt Type D (high runoff - clay sol... Steep (greater 10%) LID Facility Summary http://uknow.brwncaId.com/wastewater/Toolkits/Watershed/SiteToolkit/ReportResult.aspx?pid= 138617&bid=SDC-0001 &sic=n... 6/14/2013 Kecprt Result ^^1 Pa^^of 2 BMP ID Type Description Plan Area (sqft) Volume 1(cft) Volume 2(cft) Orifice Flow (cfs) Orifice Size (inch) BMPS Bioretention DA8A 172 144 103 0.01 0.5 BMP 18 Bioretention DA8B 294 245 176 0.016 0.6 http://uknow.brwncald.com/wastevvater/TooIkits/Watershed/SiteToolkit/ReportResult.aspx?pid==138617&bid=SDC-00 6/14/2013 rt Result Pa^^of 1 Project Summary Project Name LA COASTA TOWN SQUARE Project Applicant PDC Jurisdiction City of Carlsbad Parcel (APN) 223-060-32 Hydrologic Unit Carlsbad Compliance Basin Summary Basin Name: LCTS Receiving Water: ENCINITAS CREEK Rainfall Basin Oceanside Mean Annual Precipitation (inches) 13.3 Project Basin Area (acres): 43.10 Watershed Area (acres): 43.10 SCCWRP Lateral Channel Susceptiblity (H, M, L): Low (Lateral) SCCWRP Vertifical Channel Susceptiblity (H, M, L): Low (Vertical) Overall Channel Susceptibility (H, M, L): LOW Lower Flow Threshold (% of 2-Year Flow): 0.5 Drainage Management Area Summary ID Type BMP ID Description Area (ac) Pre-Project Cover Post Surface Type Drainage Soil Slope 28272 Drains to LID BMP 1 DA9-AC 0.05 Pervious (Pre) Concrete or asphalt Type D (high ainoff - clay soi... Steep (greater 10%) 28273 Drains to LID BMPl DA9-LS 0.00 Pen/ious (Pre) Landscaping Type D (high runoff - clay soi... Steep (greater 10%) 2S274 Drains to LID BMP 1 DA9-SW 0.01 Pervious (Pre) Concrete or asphalt Type D (high runoff - clay soi... Steep (greater 10%) LID Facility Summary BMP ID Type Description Plan Area (sqft) Volume 1 (eft) Volume 2(cft) Orifice Flow (cfs) Orifice Size (inch) BMP 1 Bioretention DA9 151 126 90 0.009 0.5 http://uknow.brwncald.eom/wastewater/Toolkits/Watershed/SiteToolkit/ReportResult.aspx?pid= 138617&bid=SDC-0001 &sic=n... 6/21/2013 Project Summary Project Name 1 - LA COSTA TOWN SQUARE - COMMERCIAL - Project Applicant PDC Jurisdiction City of Carlsbad Parcel (APN) 223-060-32 Hydrologic Unit Carlsbad Compliance Basin Summary Basin Name: LCTS ENCINITAS CREEK Rainfall Basin Oceanside Mean Annual Precipitation (inches) 13.3 Project Basin Area (acres): 43.10 Watershed Area (acres): 43.10 SCCWRP Lateral Channel SuscepUblity (H, M, L): Low (Lateral) SCCWRP Vertifical Channel Susceptiblity (H, M, L): Low (Vertical) Overall Channel Susceptibility (H, IU, L): LOW Lower Flow Threshold (% of 2-Year Flow): 0.5 Drainage lUlanagement Area Summary 27472 27473 27474 Drains to LID Drains to UD Drains to LID BMP 10 BMP 4 BMP 4 BMP 4 DAI O-SW DA4A-AC DA4A-LS DA4A-SW 0.00 0.13 0.04 0.00 Pervious (Pre) Pervious (Pre) Pervious (Pre) Pervious (Pre) Concrete or asphalt Concrete or asphalt Landscaping Concrete or asphalt LID Facility Summary Type D (high runoff - clay soi... Type D (high runoff-clay soi... Type D (high runoff-day soi... Type D (high runoff - day soi... Steep (greater 10%) Steep (greater 10%) Steep (greater 10%) Steep (greater 10%) Project Summary Project Name 1 - LA COSTA TOWN SQUARE - COMMERCIAL -1 Project Applicant PDC Jurisdiction City of Cartsbad Parcel (APN) 223-060-32 Hydrologic Unit Carlsbad Compliance Basin Summary Basin Name: Receiving Water: Rainfall Basin Mean Annual Precipitation (inches) Willi 1 r^.^ ^rvctrv Oceanside Project Basin Area (acres): 43.10 Watershed Area (acres): 43.10 SCCWRP Lateral Channel Susceptiblity (H, M, Ll: Low (Lateral) SCCWRP Vertifical Channel Susceptiblity (H, M, L)- Overall Channel Susceptibilitv IH. M 11- Low (Vertical) Lower Flow Threshold (% of 2-year Flow): Drainage Management Area Summary LID Facility Summary I^rt Result Project Summary Project Name LA COSTA TOWN SQUARE Project Applicant PDC Jurisdiction City of Carlsbad Parcel (APN) 223-060-32 Hydrologic Unit Carlsbad Compliance Basin Summary Basin Name: LCTS Receiving Water: ENCINITAS CREEK Rainfall Basin Oceanside Mean Annual Precipitation (inches) 13.3 Project Basin Area (acres): 43.10 Watershed Area (acres): 43.10 SCCWRP Laterai Channel Susceptiblity (H, M, L): Low (Lateral) SCCWRP Vertifical Channel Susceptiblity (H, M, L): Low (Vertical) Overall Channel Susceptibility (H, M, L): LOW Lower Flow Threshold (% of 2-Year Flow): 0.5 Pa^of 1 Drainage Management Area Summary a^j^i ID Type BMP ID Description Area (ac) Pre-Project Cover Post Surface Type Drainage Soil Slope 28197 Drains to LID BMP 13 DA13^C 0.08 Pervious (Pre) Concrete or asphalt Type D (high runoff - clay soi... Steep (greater 10%) 28198 Drains to LID BMP 13 DA13-LS 0.19 Pervious (Pre) Landscaping Type D (high runoff - clay soi... Steep (greater 10%) 28199 Drains to LID BMP 13 DA13-RF 0.06 Pervious (Pre) Roofs Type D (high runoff - clay soi... Steep (greater 10%) 28200 Drains to LID BMP 13 DA13-SW 0.00 Pervious (Pre) Concrete or asphalt Type D (high runoff - clay soi... Steep (greater 10%) LID Facility Summary BMP ID Type Description Plan Area (sqft) Volume 1(cft) Volume 2(cft) Orifice Flow (cfs) Orifice Size (inch) BMP 13 Bioretention DAI 3 377 314 226 0.042 1.00 http://uknow.brwncald.com/wastewater/Toolkits/Watershed/SiteToolkit/ReDortResult.asDX?Did=138617&bid=SDC-0001&.sic-n... 6/?.n/?nn Kenort Result PagfiJ of2 Project Summary Project Name LA COSTA TOWN SQUARE - COMMERCIAL Project Applicant PDC Jurisdiction City of Carlsbad Parcel (APN) 223-060-32 Hydrologic Unit Carlsbad Compliance Basin Summary Basin Name: LCTS Receiving Water: ENCINITAS CREEK Rainfall Basin Oceanside Mean Annual Precipitation (inches) 13.3 Project Basin Area (acres): 43.10 Watershed Area (acres): 43.10 SCCWRP Lateral Channel Susceptibiity (H, M, L): Low (Lateral) SCCWRP Vertifical Channel Susceptiblity (H, M, L): Low (Vertical) Overall Channel Susceptibility (H, M, L): LOW Lower Flow Threshold (% of 2-Year Flow): 0.5 Drainage Management Area Summary ID Type BMP ID Description Area (ac) Pre-Project Cover Post Surface Type Drainage Soil Slope 27951 Drains to LID BMP 4 DA14A-AC 0.07 Pervious (Pre) Concrete or asphalt Type D (high mnoff - clay soi... Steep (greater 10%) 27952 Drains to LID BMP 4 DA14A-LS 0.07 Pen/ious (Pre) Landscaping Type D (high runoff - clay soi... Steep (greater 10%) 27953 Drains to LID BMP 4 DA14A-SW 0.00 Pen/ious (Pre) Concrete or asphalt Type D (high runoff - clay soi... Steep (greater 10%) 27998 Drains to LID BMP 14 DA14B-AC 0.05 Pervious (Pre) Concrete or asphalt Type D (high mnoff - clay soi... Steep (greater 10%) 28000 Drains to LID BMP 14 DA14B-LS 0.04 Pen/ious (Pre) Landscaping Type D (high njnoff- clay sol... Steep (greater 10%) 28036 Drains to LID BMP 14 DA14B-SW 0.01 Pervious (Pre) Concrete or asphalt Type D (high runoff - clay soi... Steep (greater 10%) http://uknow.brwncald.com/wastewater/Toolkits/Watershed/SiteToolkit/ReportResult.aspx?pid=138617«&bid-SDC-0001&sic=n... 6/14/2013 Kenort Result Pa^^of2 LID Facility Summary BMP ID Type Description Plan Area (sqft) Volumet (eft) Volume 2(cft) Orifice Flow (cfs) Orifice Size (inch) BMP 4 Bioretention DA14A 243 203 146 0.021 0.7 BMP 14 Bioretention DAUB 158 131 94 0.013 0.6 http://uknow.brwncald.coni/wastewater/Toolkits/Watershed/SiteToolkit/ReportResult.aspx?pid=138617&bid=SDC-0001&sic=n... 6/14/2013 Project Summary Project Name 1 - LA COSTA TOWN SQUARE - COMMERCIAL -1 Project Applicant PDC Jurisdiction City of Carlsbad Parcel (APN) 223-060-32 Hydrologic Unit Carisbad Compliance Basin Summary Basin Name: LCTS Receiving Water: ENCINITAS CREEK Rainfall Basin Oceanside Mean Annual Precipitation (inches) 13.3 Project Basin Area (acres): 43.10 Watershed Area (acres): 43.10 SCCWRP Lateral Channel Susceptiblity (H, M, L): Low (Lateral) SCCWRP Vertifical Channel Susceptiblity (H, M, L): Low (Vertical) Overall Channel Susceptibility (H, M, L): LOW Lower Flow Threshold (% of 2-Year Flow): 0.5 Drainage Management Area Summary Project Summary Project Name 1 - LA COSTA TOWN SQUARE - COMMERCIAL -1 Project Applicant PDC Jurisdiction City of Carlsbad Parcel (APN) 223-060-32 Hydrologic Unit Carlsbad Compliance Basin Summary Basin Name: LCTS ENCINITAS CREEK Rainfall Basin Oceanside Mean Annual Precipitation (inches) 13.3 Project Basin Area (acres): 43.10 Watershed Area (acres): 43.10 SCCWRP Lateral Channel Susceptiblity (H, M, L): Low (Lateral) SCCWRP Vertifical Channel Susceptiblity (H, M, L): Low (Vertical) Overall Channel Susceptibility (H, M, L): LOW Lower Flow Threshold (% of 2-Year Flow): 0.5 Drainage Management Area Summary LID Facility Summary Project Summary Project Name 1 - lA COSTA TOWN SQUARE - COMMERCIAL - 1 Project Applicant PDC Jurisdiction City of Carlsbad Parcel (APN) 223-060-32 Hydrologic Unit Carlsbad Compliance Basin Summary Basin Name: LCTS ENCINITAS CREEK Rainfall Basin Oceanside Mean Annual Precipiution (inches) 13.3 Project Basin Area (acres): 43.10 Watershed Area (acres): 43.10 SCCWRP Lateral Channel Susceptiblity (H, M, L): Low (Lateral) SCCWRP Vertifical Channel Susceptiblity (H, M, L): Low (Vertical) Overall Channel Susceptibility (H, M, L): LOW Lower Flow Threshold (% of 2-Year Flow): 0.5 Drainage Management Area Summary BMP ID BMP 9 RAAD 1 n Type Bioretention + Vault DAI 9 Description Plan Area (sqft) 315 Volume 1(cft) 946 Volume 2(cft) O.OQ Orifice Flow (cfs) 0.013 Orifice Size (inch) 0.5 Bioretention + Vault DA20 1090 3271 0.00 0.048 0.9 KCDort Kesuit Pa^^of 2 Project Summary Project Name LA COSTA TOWN SQUARE - COMMERCIAL Project Applicant PDC Jurisdiction City of Cadsbad Parcel (APN) 223-060-32 Hydrologic Unit Carlsbad Compliance Basin Summary Basin Name: LCTS Receiving Water: ENCINITAS CREEK Rainfall Basin Oceanside Mean Annual Precipitation (inches) 13.3 Project Basin Area (acres): 43.10 Watershed Area (acres): 43.10 SCCWRP Lateral Channel Susceptiblity (H| M, L): Low (Lateral) SCCWRP Vertifical Channel Susceptiblity (H, M, L): Low (Vertical) Overall Channel Susceptibility (H, M, L): LOW Lower Flow Threshold (% of 2-Year Flow): 0.5 Drainage Management Area Summary ID Type BMP ID Description Area (ac) Pre-Project Cover Post Surface Type Drainage Soil Slope 27951 Drains to LID BMP 1 DA21A-AC 0.04 Pen/ious (Pre) Concrete or asphalt Type D (high runoff - clay soi... Steep (greater 10%) 27952 Drains to LID BMP 2 DA2 IB-AC 0.08 Pen/ious (Pre) Concrete or asphalt Type D (high mnoff - clay soi... Steep (greater 10%) 27953 Drains to LID BMP 3 DA21C-AC 0.07 Pervious (Pre) Concrete or asphalt Type D (high runoff - clay soi... Steep (greater 10%) 27998 Drains to LID BMP 4 DA2 ID-AC 0.09 Pervious (Pre) Concrete or asphalt Type D (high mnoff - day soi... Steep (greater 10%) 28000 Drains to LID BMP 5 DA21E-AC 0.07 Pervious (Pre) Concrete or asphalt Type D (high mnoff - clay soi... Steep (greater 10%) LID Facility Summary http://uknow.brwncald.com/wastewater/Toolkits/Watershed/SiteToolkit/ReportResult.aspx?pid=138617&bid=SDC-0001&sic=n... 6/14/2013 Renprt Result Pa^^of2 BMP ID Type Description Plan Area (sqft) Volume 1(cft) Volume 2(cft) Orifice Flow (cfs) Orifice Size (Inch) BMP 1 Bioretention DA21A 95 79 57 0.005 0.3 BMP 2 Bioretention DA21B 158 131 94 0.013 0.6 BMPS Bioretention DA21C 172 143 103 0.009 0.5 BMP 4 Bioretention DA21D 202 168 121 0.011 0.5 BMPS Bioretention DA21E 156 130 94 0.008 0.5 http://uknow.brwncald.coni/wastewater/Toolkits/Watershed/SiteToolkit/ReportResult.aspx?pid= 138617&bid=SDC-0001 &sic=n... 6/14/2013 I^rt Result Project Summary Project Name LA COSTA TOWN SQUARE Project Applicant PDC Jurisdiction City of Carisbad Parcel (APN) 223-060-32 Hydrologic Unit Carlsbad Compliance Basin Summary Basin Name: LCTS Receiving Water: Rainfall Basin Oceanside Mean Annual Precipitation (inches) 13.3 Project Basin Area (acres): 43.10 Watershed Area (acres): 43.10 SCCWRP Lateral Channel Susceptiblity (H, M, L): Low (Lateral) SCCWRP Vertifical Channel Susceptiblity (H, M, L): Low (Vertical) Overall Channel Susceptibility (H, M, L): LOW Lower Flow Threshold (% of 2-Year Flow): 0.5 Pa^l^of 1 Drainage Management Area Summary ID Type BMP ID Description Area (ac) Pre-Project Cover Post Surface Type Drainage Soil Slope 28278 Drains to LID BMPl DA22-AC 0.10 Pervious (Pre) Concrete or asphalt Type D (high runoff - clay soi... Steep (greater 10%) LID Facility Summary BMP ID Type Description Plan Area (sqft) Volume 1(cft) Volume 2(cft) Orifice Flow (cfs) Orifice Size (inch) BMP 1 Bioretention DA22 230 192 138 0.013 0.6 http://uknow.brwncald.com/wastewater/Toolkits/Watershed/SiteToolkit/ReportResult.aspx?pid= 138617&bid=SDC-0001 &sic=n... 6/21/2013 i Project Summary Project Name Project Applicant Project Summary Project Name Project Applicant 1 - LA COSTA TOWN SQUARE - COMMERCIAL -1 Jurisdiction City of Cartsbad Parcel (APN) 223-060-32 Hydrologic Unit Carlsbad Drainage Management Area Summary 27607 Drains to LID BMP 6 DA26-SW LID Facility Summary 0.09 Pervious (Pre) Concrete or asphalt Type D (high runoff - day soi... Steep (greater 10%) jj^rt Result Project Summary Project Name LA COSTA TOWN SQUARE Project Applicant PDC Jurisdiction City of Carisbad Parcel (APN) 223-060-32 Hydrologic Unit Carisbad Compliance Basin Summary Basin Name: LCTS Receiving Water: Rainfall Basin Oceanside Mean Annual Precipitation (inches) 13.3 Project Basin Area (acres): 43.10 Watershed Area (acres): 43.10 SCCWRP Lateral Channel Susceptiblity (H, M, L): Low (Lateral) SCCWRP Vertifical Channel Susceptiblity (H, M, L): Low (Vertical) Overall Channel Susceptibility (H| M, L): LOW Lower Flow Threshold (% of 2-Year Flow): 0.5 PadiJ of 1 Drainage Management Area Summary a^^ ID Type BMP ID Description Area (ac) Pre-Project Cover Post Surface Type Drainage Soil Slope 28288 Drains to LID BMP 1 DA27-AC 0.97 Pervious (Pre) Concrete or asphalt Type D (high runoff - clay soi... Steep (greater 10%) 28290 Drains to LID BMP 1 DA27-LS 0.45 Pervious (Pre) Landscaping Type D (high runoff - clay soi... Steep (greater 10%) 28291 Drains to LID BMP 1 DA27-RF 0.36 Pervious (Pre) Roofs Type D (high runoff - clay soi... Steep (greater 10%) 28292 Drains to LID BMP 1 DA27-SW 0.19 Pervious (Pre) Concrete or asphalt Type D (high runoff - clay soi... Steep (greater 10%) LID Facility Summary BMP ID Type Description Plan Area (sqft) Volume 1(cft) Volume 2(cft) Orifice Flow (cfs) Orifice Size (inch) BMP 1 Bioretention + Vault DA27 2757 8273 0.00 0.243 2.00 http://uknow.brwncald.com/wastewater/Toolkits/Watershed/SiteToolkit/ReportResult.aspx?pid=138617&bid=SDC-0001&sic=n... 6/21/2013 jvepon tv.esuii PaaeJ of 1 a^^ Drainage Management Area Summary Project Summary Project Name LA COSTA TOWN SQUARE Project Applicant PDC Jurisdiction City of Carisbad Parcel (APN) 223-060-32 Hydrologic Unit Carlsbad Compliance Basin Summary Basin Name: LCTS Receiving Water: Rainfall Basin Oceanside Mean Annual Precipitation (inches) 13.3 Project Basin Area (acres): 43.10 Watershed Area (acres): 43.10 SCCWRP Lateral Channel Susceptiblity (H, M, L): Low (Lateral) SCCWRP Vertifical Channel SuscepUblity (H, M, L): Low (Vertical) Overall Channel Susceptibility (H, M, L): LOW Lower Flow Threshold (% of 2-Year Flow): 0.5 ID Type BMP ID Description Area (ac) Pre-Project Cover Post Surface Type Drainage Soil Slope 23288 Drains to LID DA28-AC 0.41 Pervious (Pre) Concrete or asphalt Type D (high mnoff - clay soi... Steep (greater 10%) LID Facility Summary BMP ID Type ^- -^ Description Plan Area (sqft) Volume 1(cft) Volume 2(cft) Orifice Flow (cfs) Orifice Size (inch) BMP 1 Bioretention ^Vault' 1 fer^ DA2S ) \ 714 2143 0.00 0.050 0.9 http://uknow.brwncald.com/wastewater/Toolkits/Watershed/SiteToolkit/ReportResult.aspx?pid=138617&bid=SDC-0001&sic=n... 6/21/2013 Project Summary Project Name 1 - LA COSTA TOWN SQUARE - COMMERCIAL -1 Project Applicant PDC Jurisdiction City of Cartsbad Parcel (APN) 223-060-32 Hydrologic Unit Carlsbad Compliance Basin Summary Basin Name: Receiving Water: Rainfall Basin Mean Annual Precipitation (inches) -...villi I/-I.J ^^l\t.tl\ Oceanside Project Basin Area (acres): Watershed Area (acres): 1 o.O 43.10 SCCWRP Lateral Channel Susceptiblity (H, M, L): Low (Lateral) SCCWRP Vertifical Channel Susceptiblity (H, M| L): Overall Channel Susceptibilitv (H M i \- Low (Vertical) Drainage Management Area Summary Type Project Summary Project Summary Project Name 1 - LA COSTA TOWN SQUARE - COMMERCIAL -1 Project Applicant PDC Jurisdiction City of Carisbad Parcel (APN) 223-060-32 Hydrologic Unit Carisbad Compliance Basin Summary Basin Name: LCTS Receiving Water: ENCINITAS CREEK RainfaU Basin Oceanside Mean Annual Precipitation (inches) 13.3 Project Basin Area (acres): 43.10 Watershed Area (acres): 43.10 SCCWRP Lateral Channel Susceptiblity (H, M, L): Low (Lateral) SCCWRP Vertifical Channel Susceptiblity (H, M, L): Low (Vertical) Overall Channel Susceptibility (H, M, L): LOW Lower Flow Threshold (% of 2-Year Flow): 0.5 Drainage Management Area Summary BMP ID BMP 3 Bioretention DA33 343 286 205 0.021 0.7 BMP 4 Bioretention DA34 58 49 35 0.003 0.3 Project Summary Project Name 1 - U COSTA TOWN SQUARE - COMMERCIAL -1 Project Applicant PDC Jurisdiction City of Carisbad Parcel (APN) 223-060-32 Hydrologic Unit Carisbad Compliance Basin Summary Basin Name: Receiving Water: ENCINITAS CREEK Rainfall Basin Oceanside Mean Annual Precipitation (inches) 13.3 Project Basin Area (acres): Watershed Area (acres): 43.10 *r«3.1 U SCCWRP Lateral Channel Susceptiblity (H, M, L): Low (Lateral) SCCWRP Vertifical Channel Susceptiblity (H, M, L): Low (Vertical) OveraU Channel Susceotibilitv lu u i\- Lower Flow Threshold (% of 2-Year Flow): Drainage Management Area Summary 26707 26708 26711 Drains to LID BMP 5 BMPS Drains to LID Drains to LID 26712 Drains to LID BMPS BMP 6 BMP 6 DA35-AC DA35-LS DA3S-SW DA36-RF DA36-SW 0.09 0.01 0.02 Pre-Project Cover Pervious (Pre) Pervious (Pre) Pervious (Pre) 0.09 Pervious (Pre) Pervious (Pre) Post Surfoce Type Concrete or asphalt Landscaping Concrete or asphalt Roofs Concrete or asphalt LID Facility Summary Type D (high runoff-day soi... Type D (high runoff-day soi... Type D (high runoff - day SOL.. Type D (high runoff - day soi... Type D (high runoff-day sol... Slope Sleep (greater 10%) Steep (greater 10%) Steep (greater 10%) Steep (greater 10%) Steep (greater 10%) Orifice Size (inch) 0.6 Kepon Kesuit P^^ ofl Drainage Management Area Summary Project Summary Project Name LA COSTA TOWN SQUARE Project Applicant PDC Jurisdiction City of Cartsbad Parcel (APN) 223-060-32 Hydrologic Unit Carlsbad Compliance Basin Summary Basin Name: LCTS Receiving Water: Rainfall Basin Oceanside Mean Annual Precipitation (inches) 13.3 Project Basin Area (acres): 43.10 Watershed Area (acres): 43.10 SCCWRP Lateral Channel Susceptiblity (H, M, L): Low (Lateral) SCCWRP Vertifical Channel Susceptiblity (H, M, L): Low (Vertical) Overall Channel Susceptibility (H, M, L): LOW Lower Flow Threshold (% of 2-Year Flow): 0.5 ID Type BMP ID Description Area (ac) Pre-Project Cover Post Surface Type Drainage Soil Slope 28278 Drains to LID BMP 1 DA37-LS 0.00 Pervious (Pre) Landscaping Type D (high mnoff - clay soi... Steep (greater 10%) 28280 Drains to LID BMP 1 DA37-RF 0.09 Pervious (Pre) Roofs Type D (high runoff - clay soi... Steep (greater 10%) 28281 Drains to LID BMP 1 DA37-SW 0.03 Pervious (Pre) Concrete or asphalt Type D (high mnoff - clay soi... Steep (greater 10%) LID Facility Summary BMP ID Type Description Plan Area (sqft) Volumet (eft) Volume 2(cft) Orifice Flow (cfs) Orifice Size (inch) BMP 1 Bioretention DA37 278 231 166 0.016 0.6 http://uknow.brwncald.com/wastewater/Toolkits/Watershed/SiteToolkit/ReportResult.aspx?pid=138617&bid=SDC-0001&sic=n... 6/21/2013 Kepon Kesuit PaasJ of 1 Drainage Management Area Summary Project Summary Project Name LA COSTA TOW/N SQUARE Project Applicant PDC Jurisdiction City of Carlsbad Parcel (APN) 223-060-32 Hydrologic Unit Carisbad Compliance Basin Summary Basin Name: LCTS Receiving Water: ENCINITAS CREEK Rainfall Basin Oceanside Mean Annual Precipitation (inches) 13.3 Project Basin Area (acres): 43.10 Watershed Area (acres): 43.10 SCCWRP Lateral Channel Susceptiblity (H, M, L): Low (Lateral) SCCWRP Vertifical Channel Susceptiblity (H| M, L): Low (Vertical) Overall Channel Susceptibility (H, M, L): LOW Lower Row Threshold (% of 2-Year Flow): 0.5 ID Type BMP ID Description Area (ac) Pre-Project Cover Post Surface Type Drainage Soil Slope 28205 Drains to LID BMPS DA38-AC 0.21 Pervious (Pre) Concrete or asphalt Type D (high runoff - clay soi... Steep (greater 10%) 28206 Drains to LID BMPS DA38-LS 0.03 Pervious (Pre) Landscaping Type D (high runoff - clay soi... Steep (greater 10%) 28207 Drains to LID BMPS DA38-RF 0.05 Pervious (Pre) Roofs Type D (high runoff - clay soi... Steep (greater 10%) 28208 Drains to LID BMPS DA38-SW 0.1 Pervious (Pre) Concrete or asphalt Type D (high runoff - clay soi... Steep (greater 10%) LID Facility Summary BMP ID Type Description Plan Area (sqft) Volume 1(cft) Volume 2(cft) Orifice Flow (cfs) Orifice Size (inch) BMPS Bioretention + Vault DA38 652 1957 0.00 0.049 0.9 http://uknow.brwncaId.com/wastewater/Toolkits/Watershed/SiteToolkit/ReportResult.aspx?pid=138617&bid=SDC-0001&sic=n... 6/20/2013 Project Summary LID Facility Summary Drainage Management Area Summary Project Summary Project Name 1 - LA COSTA TOWN SQUARE - COMMERCIAL -1 Project Applicant PDC Jurisdiction City of Cartsbad Parcel (APN) 223-060-32 Hydrologic Unit Carisbad Compliance Basin Summary Basin Name: LCTS Receiving Water: ENCINITAS CREEK Rainfall Basin Oceanside Mean Annual Precipitation (inches) 13.3 Project Basin Area (acres): 43.10 Watershed Area (acres): 43.10 SCCWRP Lateral Channel Susceptiblity (H, M, L): Low (Lateral) SCCWRP Vertifical Channel Susceptiblity (H, M, L): Low (Vertical) Overall Channel Susceptibility (H, M, L): LOW Lower Flow Threshold (% of 2-Year Flow): 0.5 Drainage Management Area Summary LID Facility Summary Project Summary Project Name 1 - LA COSTA TOWN SQUARE - COMMERCIAL -1 Project Applicant PDC Jurisdiction City of Carisbad Parcel (APN) 223-060-32 Hydrologic Unit Carisbad Compliance Basin Summary Basin Nanrie: LCTS Receiving Water: Rainfall Basin Oceanside Mean Annual Precipitation (inches) 13.3 Project Basin Area (acres): 43.10 Watershed Area (acres): 43.10 SCCWRP Lateral Channel Susceptiblity (H, M, L): Low (Lateral) SCCWRP Vertifical Channel Susceptiblity (H, M, L): Low (Vertical) Overall Channel Susceptibility (H, M, L): LOW Lower Flow Threshold (% of 2-Year Flow): 0.5 Drainage Management Area Summary BMP ID Type Description Plan Area (sqft) Volume 1(cft) Volume 2(cft) Orifice Flow (cfs) BMP 3 Bioretention DA43 178 148 107 0.010 0.5 BMP 4 Bioretention + Vault DA44 535 1605 0.00 0.037 0.8 Renprt Result Pa^^of 1 Project Summary Project Name LA COSTA TOWN SQUARE Project Applicant PDC Jurisdiction City of Carisbad Parcel (APN) 223-060-32 Hydrologic Unit Carisbad Compliance Basin Summary Basin Name: LCTS Receiving Water: Rainfall Basin Oceanside Mean Annual Precipitation (inches) 13.3 Project Basin Area (acres): 43.10 Watershed Area (acres): 43.10 SCCWRP Lateral Channel Susceptiblity (H, M, L): Low (Lateral) SCCWRP Vertifical Channel Susceptiblity (H, M, L): Low (Vertical) Overall Channel Susceptibility (H, M, L): LOW Lowrer Flow Threshold (% of 2-Year Flow): 0.5 Drainage Management Area Summary ID Type BMP ID Description Area (ac) Pre-Project Cover Post Surface Type Drainage Soil Slope 28278 Drains to LID BMP1 DA45-AC 0.06 Pervious (Pre) Concrete or asphalt Type D (high mnoff - clay soi... Steep (greater 10%) 28281 Drains to LID BMP 1 DA45-SW 0.06 Pervious (Pre) Concrete or asphalt Type D (high mnoff - clay soi... Steep (greater 10%) LID Facility Summary BMP ID Type Description Plan Area (sqft) Volume 1(cft) Volume 2(cft) Orifice Flow (cfs) Orifice Size (inch) BMP 1 Bioretention + Vault DA45 219 658 0.00 0.015 0.6 http://uknow.brwncald.com/wastewater/Toolkits/Watershed/SiteToolkit/ReportResult.aspx?pid=138617&bid=SDC-0001&sic=n... 6/21/2013 KeDOrt Result i^^i Pa^^of 2 Project Summary Project Name LA COSTA TOWN SQUARE Project Applicant PDC Jurisdiction City of Carisbad Parcel (APN) 223-060-32 Hydrologic Unit Carlsbad Compliance Basin Summary Basin Name: LCTS Receiving Water: ENCINITAS CREEK Rainfall Basin Oceanside Mean Annual Precipitation (inches) 13.3 Project Basin Area (acres): 43.10 Watershed Area (acres): 43.10 SCCWRP Lateral Channel SuscepUblity (H, M, L): Low (Lateral) SCCWRP Vertifical Channel Susceptiblity (H, M, L): Low (Vertical) Overall Channel Susceptibility (H, M, L): LOW Lower Flow Threshold (% of 2-Year Flow): 0.5 Drainage Management Area Summary ID Type BMP ID Description Area (ac) Pre-Project Cover Post Surface Type Drainage Soil Slope 28222 Drains to LID BMPS DA46A-AC 0.30 Pervious (Pre) Concrete or asphalt Type D (high mnoff - clay soi... Steep (greater 10%) 28223 Drains to LID BMP 6 DA46A-LS 0.28 Pervious (Pre) Annended, mulched soil Type D (high mnoff - clay soi... Steep (greater 10%) 28227 Drains to LID BMP 6 DA46A-RF 0.16 Pervious (Pre) Roofs Type D (high mnoff - clay soi... Steep (greater 10%) 28228 Drains to LID BMP 6 DA46A-SW 0.01 Pen/ious (Pre) Roofs Type D (high mnoff - clay soi... Steep (greater 10%) 28229 Drains to LID BMP 7 DA46B-AC 0.34 Pervious (Pre) Concrete or asphalt Type D (high runoff - clay soi... Steep (greater 10%) 28230 Drains to LID BMP 7 DA46B-LS 0.07 Pervious (Pre) Landscaping Type D (high mnoff - clay soi... Steep (greater 10%) http://uknow.brwncald.com/wastewater/Toolkits/Watershed/SiteToolkit/ReportResult.aspx?pid=138617&bid=SDC-0001&sic=n... 6/20/2013 Reoprt Result Pa||^of 2 28231 Drains to LID BMP 7 DA46B-RF 0.17 Pen/ious (Pre) Roofs Type D (high runoff - clay soi... Steep (greater 10%) 28232 Drains to LID BMP 7 DA46B-SW 0.02 Pervious (Pre) Concrete or asphalt Type D (high mnoff - clay soi... Steep (greater 10%) LID Facility Summary BMP ID Type Description Plan Area (sqft) Volume 1(cft) Volume 2(cft) Orifice Flow (cfs) Orifice Size (inch) BMP 6 Bioretention DA46A 1139 950 683 0.094 1.00 BMP 7 Bioretention DA46B 1198 999 719 0.075 1.00 http://uknow.brwncald.coni/wastewater/Toolkits/Watershed/SiteToolkit/ReportResult.aspx?pid=138617&bid=SDC-0001&sic=n... 6/20/2013 Project Summary Project Name 1 - LA COSTA TOWN SQUARE - COMMERCIAL -1 Project Applicant PDC Jurisdiction City of Carisbad Parcel (APN) 223-060-32 Hydrologic Unit Carisbad Compliance Basin Summary Basin Name: LCTS Receiving Water: ENCINITAS CREEK Rainfall Basin Oceanside Mean Annual Precipitation (inches) 13.3 Project Basin Area (acres): 43.10 Watershed Area (acres): 43.10 SCCWRP Lateral Channel Susceptiblity (H, M, L): Low (Lateral) SCCWRP Vertifical Channel Susceptiblity (H, M, L): Low (Vertical) Overall Channel Susceptibility (H, M, L): LOW Lower Flow Threshold (% of 2-Year Flow): 0.5 Drainage Management Area Summary 10 Type BMP ID Description Area (ac) Pre-Project Cover Post Surface Type Drainage Soil Slope 2673S Drains to LID BMP 7 DA47-AC 0.10 Pervious (Pre) Concrete or asphalt Type D (high runoff - day soi... Steep (greater 10%) 26736 Drains to LID BMP 7 DA47-LS 0.00 Pervious (Pre) Landscaping Type D (high runoff - day soi... Steep (greater 10%) 26737 Drains to LID BMP 7 DA47-SW 0.01 Pervious (Pre) Concrete or asphalt Type D (high runoff - day soi... Steep (greater 10%) 26739 Drains to LID BMPS DA48-AC 0.20 Pervious (Pre) Concrete or asphalt Type D (high runoff - day soi... Steep (greater 10%) 26740 Drains to LID BMPS DA48-LS 0.03 Pervious (Pre) Landscaping Type D (high runoff - day soi... Steep (greater 10%) 26741 Drains to LID BMP 8 DA4S-SW 0.00 Pervious (Pre) Concrete or asphalt Type D (high runoff - day soi... Steep (greater 10%) LID Facility Summary Project Summary Project Name Project Summary Project Name Project Applicant 1 - LA COSTA TOWN SQUARE - COMMERCIAL - 1 Jurisdiction City of Carisbad Parcel (APN) 223-060-32 Hydrologic Unit Carisbad Compliance Basin Summary Basin Name: Receiving Water: Rainfall Basin Mean Annual Precipitation (inches) ENCINITAS CREEK Oceanside 13.3 Project Basin Area (acres): Watershed Area (acres): 43.10 43.10 SCCWRP Lateral Channel Susceptiblity (H, M, L)- SCCWRP Vertifical Channel Susceptiblity (H, M, L)- Low (Lateral) Low (Vertical) Drainage Management Area Summary LID Facility Summary Recprt Result PagaJ of 1 Drainage Management Area Summary Project Summary Project Name LA COSTA TOWN SQUARE Project Applicant PDC Jurisdiction City of Carlsbad Parcel (APN) 223-060-32 Hydrologic Unit Carlsbad Compliance Basin Summary Basin Name: LCTS Receiving Water ENCINITAS CREEK Rainfall Basin Oceanside Mean Annual Precipitation (inches) 13.3 Project Basin Area (acres): 43.10 Watershed Area (acres): 43.10 SCCWRP Lateral Channel Susceptiblity (H, M, L): Low (Lateral) SCCWRP Vertifical Channel Susceptiblity (H, M, L): Low (Vertical) Overall Channel Susceptibility (H, M, L): HIGH Lower Flow Threshold {% of 2-Year Flow): 0.1 ID Type BMP ID Description Area (ac) Pre-Project Cover Post Surface Type Drainage Soil Slope 28210 Drains to LID BMP 3 DA53-AC 0.14 Pervious (Pre) Concrete or asphalt Type D (high runoff - clay soi... Steep (greater 10%) 28211 Drains to LID BMP 3 DA53-LS 0.01 Pervious (Pre) Landscaping Type D (high mnoff - clay soi... Steep (greater 10%) 28212 Drains to LID BMPS DA53-SW 0.01 Pervious (Pre) Concrete or asphalt Type D (high runoff - clay soi... Steep (greater 10%) 28214 Drains to LID BMP 4 DA54-AC 0.15 Pervious (Pre) Concrete or asphalt Type D (high runoff - clay soi... Steep (greater 10%) 28215 Drains to LID BMP 4 DA54-SW 0.00 Pervious (Pre) Concrete or asphalt Type D (high runoff - clay soi... Steep (greater 10%) LID Facility Summary BMP ID Type Description Plan Area (sqft) Volume 1(cft) Volume 2(cn| Orifice Flow (cfs) Orifice Size (inch) BMPS Bioretention + Vault DASS 292 1168 0.00 0.004 0.2 BMP 4 Bioretention + Vault DA54 280 1122 0.00 0.003 0.2 http://ukiiow.brwncald.com/wastewater/Toolkits/Watershed/SiteTooIkit/RepoitResult.aspx?pid=138617&bid=SDC-0001&sic=n... 6/20/2013 Project Summary LID Facility Summary Keport Result ?as2J of 1 Drainage Management Area Summary Project Summary Project Name LA COSTA TOWN SQUARE Project Applicant PDC Jurisdiction City of Carisbad Parcel (APN) 223-060-32 Hydrologic Unit Carlsbad Compliance Basin Summary Basin Name: LCTS Receiving Water: Rainfall Basin Oceanside Mean Annual Precipitation (inches) 13.3 Project Basin Area (acres): 43.10 Watershed Area (acres): 43.10 SCCWRP Lateral Channel Susceptiblity (H, M, L): Low (Lateral) SCCWRP Vertifical Channel Susceptiblity (H, M, L): Low (Vertical) Overall Channel Susceptibility (H, M, L): LOW Lower Flow Threshold (% of 2-Year Flow): 0.5 ID Type BMP ID Description Area (ac) Pre-Project Cover Post Surface Type Drainage Soil Slope 28278 Drains to LID BMP 1 DA57-AC 0.06 Pen/ious (Pre) Concrete or asphalt Type D (high runoff - clay soi... Steep (greater 10%) 28281 Drains to LID BMP 1 DA57-LS 0.00 Pervious (Pre) Landscaping Type D (high mnoff - clay soi... Steep (greater 10%) 28282 Drains to LID BMP 1 DA57-SW 0.00 Pervious (Pre) Roofs Type D (high mnoff - clay soi... Steep (greater 10%) LID Facility Summary BMP ID Type Description Plan Area (sqft) Volume 1(cft) Volume 2(cft) Orifice Flow (cfs) Orifice Size (inch) BMP 1 Bioretention DA57 148 123 38 0.008 0.4 http://uknow.brwncald.com/wastewater/Toolkits/Watershed/SiteToolkit/ReportResult.aspx?pid= 138617&bid=SDC-0001 &sic=n... 6/21/2013 Kecort Result P^^ ofl Drainage Management Area Summary Project Summary Project Name LA COSTA TOWN SQUARE Project Applicant PDC Jurisdiction City of Carisbad Parcel (APN) 223-060-32 Hydrologic Unit Carlsbad Compliance Basin Summary Basin Name: LCTS Receiving Water: ENCINITAS CREEK Rainfall Basin Oceanside Mean Annual Precipitation (inches) 13.3 Project Basin Area (acres): 43.10 Watershed Area (acres): 43,10 SCCWRP Lateral Channel Susceptiblity (H, M, L): Low (Lateral) SCCWRP Vertifical Channel SusceptiblKy (H, M, L): Low (Vertical) Overall Channel Susceptibility (H, M, L): LOW Lower Flow Threshold (% of 2-Year Flow): 0.5 ID Type BMP ID Description Area (ac) Pre-Project Cover Post Surface Type Drainage Soil Slope 28205 Drains to LID BMPl DA58A-AC 0.05 Pervious (Pre) Concrete or asphalt Type D (high runoff - clay soi... Steep (greater 10%) 28206 Drains to LID BMP 2 DA58B-AC 0.09 Pervious (Pre) Concrete or asphalt Type D (high ojnoff- day soi... Steep (greater 10%) 28207 Drains to LID BMP 3 DA58C-AC 0.14 Pervious (Pre) Concrete or asphalt Type D (high runoff - clay soi... Steep (greater 10%) UD Facility Summary BiMP ID Type Description Plan Area (sqft) Volume 1(cft) Volume 2(cft) Orifice Flow (<:fs) Orifice Size (inch) BMP 1 Bioretention DA58A 126 105 75 0.007 0.4 BMP 2 Bioretention DA58B 215 179 129 0.012 0.5 BMP 3 Bioretention DA58C 304 264 182 0.017 0.7 http://uknow.brwncald.com/wastewater/Toolkits/Watershed/SiteToolkit/ReportResult.aspx?pid=138617&bid=SDC-0001&sic=n... 6/20/2013 Project Summary Project Name 1 - LA COSTA TOWN SQUARE - COMMERCIAL - Project Applicant PDC Jurisdiction City of Cartsbad Parcel (APN) 223-060-32 Hydrologic Unit Carisbad Compliance Basin Summary Basin Name: Receiving Water: LCTS ENCINITAS CREEK ' ' " Rainfall Basin Oceanside Mean Annual Precipitation (inches) 13.3 Project Basin Area (acres): 43.10 Watershed Area (acres): 43.10 SCCWRP Lateral Channel Susceptiblity (H, M, L): SCCWRP Vertifical Channel Susceptiblity (H, M, L): Low (Lateral) Overall Channel Susceptibility (H, M, L): LOW Drainage Management Area Summary Type Drains to LID j^rt Result Project Summary Project Name LA COSTA TOWN SQUARE Project Applicant PDC Jurisdiction City of Cartsbad Parcel (APN) 223-060-32 Hydrologic Unit Carisbad Compliance Basin Summary Basin Name: LCTS Receiving Water: ENCINITAS CREEK Rainfall Basin Oceanside Mean Annual Precipitation (inches) 13.3 Project Basin Area (acres): 43.10 Watershed Area (acres): 43.10 SCCWRP Lateral Channel Susceptiblity (H, M, L): Low (Lateral) SCCWRP Vertifical Channel Susceptiblity (H, M, L): Low (Vertical) OveraU Channel Susceptibility (H, M, L): LOW Lower Flow Threshold (% of 2-Year Flow): 0.5 Pa^of2 Drainage Management Area Summary ID Type BMP ID Description Area (ac) Pre-Project Cover Post Surface Type Drainage Soil Slope 28222 Drains to LID BMP1 DA61A-AC 0.07 Pen/ious (Pre) Concrete or asphah Type D (high mnoff - clay soi... Steep (greater 10%) 28223 Drains to LID BMP 1 DA61A-LS 0.00 Pervious (Pre) Landscaping Type D (high mnoff - clay soi... Steep (greater 10%) 2S227 Drains to LID BMP 2 DA6 IB-AC 0.13 Pen/ious (Pre) Concrete or asphalt Type D (high mnoff - clay soi... Steep (greater 10%) 28228 Drains to LID BMP 2 DA61B-LS 0.01 Pervious (Pre) Landscaping Type D (high mnoff - clay soi... Steep (greater 10%) SOI... LID Facility Summary http://uknow.brwncald.com/wastewater/Toolkits/Watershed/SiteToolkit/ReDOrtResult.asDX?Did=138617&bid=SDC-0001&sic=n... 6/20/2013 Renprt Result l^^i Pa||^of 2 BMP ID Type Description Plan Area (sqft) Volume 1(cft) Volume 2(cft) Oriflce Flow (cfs) Orifice Size (inch) BMP 1 Bioretention DA61A 162 135 97 0.010 0.5 BMP 2 Bioretention DA61B 304 254 182 0.019 0.7 http://uknow.brwncald.com/wastewater/Toolkits/Watershed/SiteToolkit/ReportResult.aspx?pid= 138617&bid=SDC-0001 &sic=n... 6/20/2013 rt Result PaasJ of 1 Project Summary Drainage Management Area Summary Project Name LA COSTA TOWN SQUARE Project Applicant PDC Jurisdiction City of Carisbad Parcel (APN) 223-060-32 Hydrologic Unit Carlsbad Compliance Basin Summary Basin Name: LCTS Receiving Water: Rainfall Basin Oceanside Mean Annual Precipitation (inches) 13.3 Project Basin Area (acres): 43.10 Watershed Area (acres): 43.10 SCCWRP Lateral Channel SuscepUblity (H, M, L): Low (Lateral) SCCWRP Vertifical Channel Susceptiblity (H. M, L): Low (Vertical) Overall Channel Susceptibility (H, M, L): LOW Lower Flow Threshold (% of 2-Year Flow): 0.5 ID Type BMP ID Description Area (ac) Pre-Project Cover Post Surface Type Drainage Soil Slope 28278 Drains to LID BMP 1 DA62-AC 0.23 Pervious (Pre) Concrete or asphalt Type D (high runoff - clay soi... Steep (greater 10%) 28281 Drains to LID BMPl DA62-LS 0.39 Pervious (Pre) Landscaping Type D (high mnoff - clay soi... Steep (greater 10%) 28282 Drains to LID BMP 1 DA62-SW 0.00 Pervious (Pre) Concrete or asphalt Type D (high mnoff - clay soi... Steep (greater 10%) LID Facility Summary BMP ID Type Description Plan Area (sqft) Volumet (eft) Volume 2(cft) Orifice Flow (cfs) Orifice Size (inch) BMP 1 Bioretention DA62 607 506 364 0.077 1.00 /wastewater/TonIkits/Watershed/SiteToolkit/ReDortResult.aspx?pid=138617&bid=SDC-0001&sic-n... 6/21/2013 Project Summary Project Name Project Applicant Jurisdiction Parcel (APN) Hydrologic Unit LID Facility Summary Kenort Result PagfiJ of 1 Project Summary Project Name LA COSTA TOWN SQUARE Project Applicant PDC Jurisdiction City of Carisbad Parcel (APN) 223-060-32 Hydrologic Unit Carlsbad Compliance Basin Summary Basin Name: LCTS Receiving Water: Rainfall Basin Oceanside Mean Annual Precipitation (inches) 13.3 Project Basin Area (acres): 43.10 Watershed Area (acres): 43.10 SCCWRP Lateral Channel Susceptiblity (H, M, L): Low (Lateral) SCCWRP Vertifical Channel Susceptiblity (H, M, L): Low (Vertical) Overall Channel Susceptibility (H, M, L): LOW Lower Flow Threshold (% of 2-Year Flow): 0.5 Drainage Management Area Summary ID Type BMP ID Description Area (ac) Pre-Project Cover Post Surface Type Drainage Soil Slope 28278 Drains to LID BMP 1 DA62-AC 0.23 Pen/ious (Pre) Concrete or asphalt Type D (high runoff - clay soi... Steep (greater 10%) 2S2S1 Drains to LID BMP 1 DA62-LS 0.39 Pervious (Pre) Landscaping Type D (high mnoff - clay soi... Steep (greater 10%) 2S282 Drains to LID BMP 1 DA62-SW 0.00 Pervious (Pre) Concrete or asphalt Type D (high mnoff - clay soi... Steep (greater 10%) LID Facility Summary BMP ID Type Description Plan Area (sqft) Volumet (eft) Volume 2(cft) Oriflce Flow (cfs) Oriflce Size (inch) BMP 1 Bioretention DA62 607 506 364 0.077 1.00 http://uknow.brwncald.com/wastewater/Toolkits/Watershed/SiteToolkit/ReportResult.aspx?pid=138617&bid=SDC-0001&sic=n... 6/21/2013 ^^rt Result Project Summary Project Name LA COSTA TOWN SQUARE Project Applicant PDC Jurisdiction City of Carisbad Parcel (APN) 223-060-32 Hydrologic Unit Carisbad Compliance Basin Summary Basin Name: LCTS Receiving Water: Rainfall Basin Oceanside Mean Annual Precipitation (inches) 13.3 Project Basin Area (acres): 43.10 Watershed Area (acres): 43.10 SCCWRP Lateral Channel Susceptiblity (H, M, L): Low (Lateral) SCCWRP Vertifical Channel Susceptiblity (H, M, L): Low (Vertical) Overall Channel Susceptibility (H, M, L): LOW Lower Flow Threshold (% of 2-Year Flow): 0.5 Pa^of 1 Drainage Management Area Summary a^^ ID Type BMP ID Description Area (ac) Pre-Project Cover Post Surface Type Drainage Soil Slope 28278 Drains to LID BMP 1 DA65-AC 0.18 Pen/ious (Pre) Concrete or asphalt Type D (high mnoff - clay soi... Steep (greater 10%) 2S2S1 Drains to LID BMP 1 DA65-RF 0.02 Pervious (Pre) Roofs Type D (high mnoff - clay soi... Steep (greater 10%) 28282 Drains to LID BMP 1 DA65-SW 0.04 Pervious (Pre) Concrete or asphalt Type D (high mnoff - clay soi... Steep (greater 10%) LID Facility Summary BMP ID Type Description Plan Area (sqft) Volumet (eft) Volume 2(cft) Orifice Flow (cfs) Orifice Size (inch) BMP 1 Bioretention + Vault DASS 446 1338 0.00 0.031 0.7 http://uknow.brwncald.com/wastewater/Toolkits/Watershed/SiteToolkit/ReportResult.asDX?Did= 138617«&bid=SDC-0001 &sic=n... 6/21 /2013 m^rt Result • Project Summary Project Name LA COSTA TOWN SQUARE Project Applicant PDC Jurisdiction City of Cartsbad Parcel (APN) 223-060-32 Hydrologic Unit Carisbad ?amLof 1 Compliance Basin Summary Basin Name: LCTS Receiving Water: Rainfall Basin Oceanside Mean Annual Precipitation (inches) 13.3 Project Basin Area (acres): 43.10 Watershed Area (acres): 43.10 SCCWRP Lateral Channel Susceptiblity (H, M, L): Low (Lateral) SCCWRP Vertifical Channel Susceptiblity (H, M, L): Low (Vertical) Overall Channel Susceptibility (H, M, L): LOW Lower Flow Threshold (% of 2-Year Flow): 0.5 Drainage Management Area Summary ID Type BMP ID Description Area (ac) Pre-Project Cover Post Surface Type Drainage Soil Slope 28288 Drains to LID BMP 1 DA70B-AC 1.03 Pervious (Pre) Concrete or asphalt Type D (high runoff - clay soi... Steep (greater 10%) 28290 Drains to LID BMP 1 DA70B-LS 0.44 Pervious (Pre) Landscaping Type D (high mnoff - clay soi... Steep (greater 10%) LID Facility Summary BMP ID Type Description Plan Area (sqft) Volume 1 (eft) Volume 2(cft) Oriflce Flow (efs) Orifice Size (Inch) BMP 1 Bioretention DA70B 2339 1951 1403 0.179 2.00 http://uknow.brwncald.com/wastewater/Toolkits/Watershed/SiteToolkit/ReDortResult.asDX?Did=138617«febid=SDC-0001&sic=n..^ 6/21/201 Result Project Summary Project Name LA COSTA TOWN SQUARE Project Applicant PDC Jurisdiction City of Cartsbad Parcel (APN) 223-060-32 Hydrologic Unit Carisbad Compliance Basin Summary Basin Name: LCTS Receiving Water: ENCINITAS CREEK Rainfall Basin Oceanside Mean Annual Precipitation (inches) 13.3 Project Basin Area (acres): 43.10 Watershed Area (acres): 43.10 SCCWRP Lateral Channel Susceptiblity (H, M, L): Low (Lateral) SCCWRP Vertifical Channel Susceptiblity (H, M, L): Low (Vertical) Overall Channel Susceptibility (H, M, L): LOW Lower Flow Threshold (% of 2-Year Flow): 0.5 Pa^of2 Drainage Management Area Summary ID Type BMP ID j Description Area (ac) Pre-Project Cover Post Surface Type Drainage Soil Slope 28222 Drains to LID BMPS DA66A-AC 0.16 Pen/ious (Pre) Concrete or asphalt Type D (high mnoff - clay soi... Steep (greater 10%) 28223 Drains to LID BMP 6 DA66A-LS 0.02 Pen/ious (Pre) Landscaping Type D (high mnoff - clay soi... Steep (greater 10%) 28227 Drains to LID BMP 6 DA66A-RF 0.04 Pervious (Pre) Roofs Type D (high mnoff - clay soi... Steep (greater 10%) 2822B Drains to LID BMP 7 DA66B-AC 0.04 Pervious (Pre) Concrete or asphalt Type D (high mnoff - clay soi... Steep (greater 10%) 28256 Drains to LID BMP 7 DA66B-LS 0.00 Pen/ious (Pre) Landscaping Type D (high mnoff - clay soi... Steep (greater 10%) 28258 Drains to LID BMP 7 DA66B-RF 0.05 Pen/ious (Pre) Roofs Type D (high mnoff - clay soi... Steep (greater 10%) http://uknow.brwncald.com/wastewater/Toolkits/Watershed/SiteToolkit/ReDortRe<?ult.asnx?nid=l 38617&bid=Snr:-0001 ^sir=n 6/90/7013 Result Pa^^of2 LID Facility Summary BMP ID Type Description Plan Area (sqft) Volume 1(cft) Volume 2(cft) Orifice Flow (cfs) Orifice Size (inch) BMP 6 Bioretention DA66A 439 366 263 0.026 0.8 BMP 7 Bioretention DA66B 223 186 134 0.013 0.6 httD://uknow.brwncald.com/wastewater/Tooikit<5/Watershed/SiteTf)olkit/RenortResiilt.a.snx?nid= 138617^hiH=Snr.nn01 <^sir=n 6/70/9013 K-eDon Kesuii Pa|j|^of 1 Drainage Management Area Summary Project Summary Project Name LA COSTA TOWN SQUARE Project Applicant PDC Jurisdiction City of Oceanside Parcel (APN) 223-060-32 Hydrologic Unit Carisbad Compliance Basin Summary Basin Name: LCTS Receiving Water: ENCINITAS CREEK Rainfall Basin Oceanside Mean Annual Precipitation (inches) 13.3 Project Basin Area (acres): 43.10 Watershed Area (acres): 43.10 SCCWRP Lateral Channel Susceptiblity (H, M, L): Low (Lateral) SCCWRP Vertifical Channel SuscepUblity (H, M, L): Low (Vertical) Overall Channel Susceptibility (H, M, L): LOW Lower Flow Threshold (% of 2-Year Flow): 0.5 ID Type BMP ID Description Area (ac) Pre-Project Cover Post Surface Type Drainage Soil Slope 28040 Drains to LID BMP 7 67A-AC 0.15 Pervious (Pre) Concrete or asphalt Type D (high runoff - clay soi... Steep (greater 10%) 28041 Drains to LID BMP 7 67A-LS 0.02 Pervious (Pre) Landscaping Type D (high runoff - clay soi... Steep (greater 10%) 28043 Drains to LID BMP 17 67B-AC 0.15 Pervious (Pre) Concrete or asphalt Type D (high mnoff - day soi... Steep (greater 10%) LID Facility Summary BMP ID Type Description Plan Area (sqft) Volume 1(cft) Volume 2(cft) Oriflce Flow (cfs) Orifice Size (inch) BMP 7 Bioretention 67A 344 287 206 0.012 0.6 BMP 17 Bioretention 67B 331 276 198 0.010 0.5 http://uknow.brwncald.com/wastewater/Toolkits/Watershed/SiteToolkit/ReportResult.aspx7pid-138617&bid=SDC-0001 &sic=n... 6/14/2013 I^rt Result Project Summary Project Name LA COSTA TOWN SQUARE Project Applicant PDC Jurisdiction City of Carisbad Parcel (APN) 223-060-32 Hydrologic Unit Carisbad Compliance Basin Summary Basin Name: LCTS Receiving Water: ENCINITAS CREEK Rainfall Basin Oceanside Mean Annual Precipitation (inches) 13.3 Project Basin Area (acres): 43.10 Watershed Area (acres): 43.10 SCCWRP Lateral Channel Susceptiblity (H, M. L): Low (Lateral) SCCWRP Vertifical Channel Susceptiblity (H, M, L): Low (Vertical) Overall Channel Susceptibility (H, M, L): LOW Lower Flow Threshold (% of 2-Year Flow): 0.5 Drainage Management Area Summary Pa^^of 1 ID Type BMP ID Description Area (ac) Pre-Project Cover Post Surface Type Drainage Soil Slope 28222 Drains to LID BMPS DA68A-AC 0.12 Pervious (Pre) Concrete or asphalt Type D (high runoff - day soi... Steep (greater 10%) 28223 Drains to LID BMP 8 DA68A-LS 0.01 Pervious (Pre) Landscaping Type D (high runoff - clay soi... Steep (greater 10%) 28227 Drains to LID BMP 9 DA68B-AC 0.12 Pervious (Pre) Concrete or asphalt Type D (high mnoff - clay soi... Steep (greater 10%) LID Facility Summary BMP ID Type Description Plan Area (sqft) Volume 1 (eft) Volume 2(cft) Orifice Flow (efs) Orifice Size (inch) BMPS Bioretention DA68A 283 236 170 0.017 0.7 BMP 9 Bioretention DA68B 261 217 156 0.014 0.6 http://uknow.brwncald.com/wastewater/Toolkits/Watershed/SiteToolkit/ReportResult.aspx?pid= 138617&bid=SDC-0001 &sic=n... 6/20/2013 Keoort Result i^^i Pa^^^of 1 Drainage Management Area Summary Project Summary Project Name LA COSTA TOW/N SQUARE Project Applicant PDC Jurisdiction City of Cartsbad Parijel (APN) 223-060-32 Hydrologic Unit Carisbad Compliance Basin Summary Basin Name: LCTS Receiving Water: Rainfall Basin Oceanside Mean Annual Precipitation (Inches) 13.3 Project Basin Area (acres): 43.10 Watershed Area (acres): 43.10 SCCWRP Lateral Channel Susceptiblity (H, M, L): Low (Lateral) SCCWRP Vertlflcal Channel Susceptiblity (H, M, L): Low (Vertical) Overall Channel Susceptibility (H, M, L): LOW Lower Flow Threshold (% of 2-Year Flow): 0.5 ID Type BMP ID Description Area (ae) Pre-Project Cover Post Surface Type Drainage Soil Slope 28278 Drains to LID BMP 1 DA69-LS 0.08 Pervious (Pre) Landscaping Type D (high mnoff - clay soi... Steep (greater 10%) 2S2S1 Drains to LID BMPl DA69-RF 0.14 Pen/ious (Pre) Roofs Type D (high runoff - clay soi... Steep (greater 10%) 28282 Drains to LID BMP 1 DA69-SW 0.04 Pervious (Pre) Concrete or asphalt Type D (high mnoff - clay soi... Steep (greater 10%) LID Facility Summary BMP ID Type Description Plan Area (sqft) Volume 1(eft) Volume 2(eft) Oriflce Flow (cfs) Oriflce Size (inch) BMP 1 Bioretention DA69 426 355 255 0.033 0.9 http://uknow.brwncald.com/wastewater/Toolkits/Watershed/SiteToolkit/ReportResult.aspx?pid= 138617&bid=SDC-0001 &sic=n... 6/21/2013 rt Result Pa|^ ofl Project Summary Project Name LA COSTA TOWN SQUARE Project Applicant PDC Jurisdiction City of Cartsbad Parcel (APN) 223-060-32 Hydrologic Unit Carisbad Compliance Basin Summary Basin Name: LCTS Receiving Water: Rainfall Basin Oceanside Mean Annual Precipitation (inches) 13.3 Project Basin Area (acres): 43.10 Watershed Area (acres): 43.10 SCCWRP Lateral Channel Susceptiblity (H, M, L): Low (Lateral) SCCWRP Vertiflcal Channel Susceptiblity (H, M, L): Low (Vertical) Overall Channel Susceptibility (H, M, L): LOW Lower Flow Threshold (% of 2-Year Flow): 0.5 Drainage Management Area Summary ID Type BMP ID Description Area (ac) Pre-Project Cover Post Surface Type Drainage Soil Slope 2S28S Drains to LID BMP 1 DA70A-LS 0.06 Pervious (Pre) Landscaping Type D (high runoff - clay soi... Steep (greater 10%) 28290 Drains to LID BMP 1 DA70A-RF 0.15 Pervious (Pre) Roofs Type D (high mnoff - clay soi... Steep (greater 10%) 28291 Drains to LID BMP 1 DA70A-SW 0.14 Pen/ious (Pre) Concrete or asphalt Type D (high mnoff - clay soi... Steep (greater 10%) LID Facility Summary BMP ID Type Description Plan Area (sqft) Volume 1 (eft) Volume 2(eft) Oriflce Flow (cfs) Oriflce Size (inch) BMP 1 Bioretention DA70A 677 564 406 0.045 1.00 http://uknow.brwncald.com/wastewater/Toolkits/Watershed/SiteToolkit/ReportResult.asDx?Did=138617&bid=SDC-0001«&sic=n... 6/21/2013 Prpject Summary Project Name BMP 10 BMP 1 BMP 2 Type Bioretention Bioretention DA71 DA72 Description Plan Area (sqft) Volume 1(cft) \ 197 164 170 142 Project Summary Project Name Project Applicant Jurisdiction Parcel (APN) Hydrologic Unit Compliance Basin Summary Basin Name: Receiving Water: Rainfall Basin Mean Annual Precipitation (inches) Project Basin Area (acres): Watershed Area (acres): SCCWRP Lateral Channel Susceptiblity (H. M. Ll: SCCWRP Vertifical Channel Susceptiblity (H, M, L): Overall Channel Susceptibility (H, M, L): Lower Flow Threshold (% of 2.Year Flow): City of Carisbad 223-060-32 Carisbad LCTS ENCINITAS CREEK Oceanside 13.3 43.10 43.10 Low (Lateral) Low (Vertical) Drainage Management Area Summary Type 26776 26777 26779 26780 Drains to LID BMP ID BMPS BMPS Description DA73-AC BMP 3 Drains to UD Drains to LID BMP 4 DA73-LS DA73-SW BMP 4 DA74-RF DA74-SW LID Facility Summary 0.01 0.00 0.09 0.09 Pre-Project Cover Post Surface Type [ Drainage Soil Slope Pervious (Pre) Concrete or asphalt Type D (high runoff - day SOL.. Steep (greater 10%) Pervious (Pre) Landscaping Type D (high runoff-day sou.. Steep (greater 10%) Pervious (Pre) Concrete or asphalt Type D (high runoff-day soi... Steep (greater 10%) Pervious (Pre) Roofs Type D (high runoff-day soi... Steep (greater 10%) Pervious (Pre) Concrete or asphalt Type D (high runoff-day soi... Steep (greater 10%) Orifice Size (inch) 0.4 Uprt Result Project Summary Project Name LA COSTA TOWN SQUARE Project Applicant PDC Jurisdiction City of Cartsbad Parcel (APN) 223-060-32 Hydrologic Unit Carlsbad Compliance Basin Summary Basin Name: LCTS Receiving Water: Rainfall Basin Oceanside Mean Annual Precipitation (inches) 13.3 Project Basin Area (aeres): 43.10 Watershed Area (aeres): 43.10 SCCWRP Lateral Channel Susceptiblity (H, M, L): Low (Lateral) SCCWRP Vertifical Channel Susceptiblity (H, Mi L): Low (Vertical) Overall Channel Susceptibility (H, M, L): LOW Lower Flow Threshold (% of 2-Year Flow): 0.5 Drainage Management Area Summary ofl ID Type BMP ID Description Area (ac) Pre-Project Cover Post Surface Type Drainage Soil Slope 2827S Drains to LID BMP 1 DA75-RF 0.13 Pervious (Pre) Roofs Type D (high mnoff - clay soi... Steep (greater 10%) 28281 Drains to LID BMP 1 DA75-RF 0.08 Pervious (Pre) Concrete or asphalt Type D (high mnoff - clay soi... Steep (greater 10%) LID Facility Summary BMP ID Type Description Plan Area (sqft) Volumet (eft) Volume 2(cft) Oriflce Flow (cts) Orifice Size (inch) BMP 1 Bioretention DA75 476 397 286 0.026 0.8 httD://uknow.brwncald.com/wastewater/Toolkits/Watershed/SiteTonlkif/RennrtRes;iilt a'?tiY7niH=138617<erhiH=<;nr-nnni J2r<=ir^=n f.ni n(\ Kepon Result PagfiJ of 1 Drainage Management Area Summary Project Summary Project Name LA COSTA TOWN SQUARE Project Applicant PDC Jurisdiction City of Cartsbad Parcel (APN) 223-060-32 Hydrologic Unit Carlsbad Compliance Basin Summary Basin Name: LCTS Receiving Water: ENCINITAS CREEK Rainfall Basin Oceanside Mean Annual Precipitation (inches) 13.3 Project Basin Area (acres): 43.10 Watershed Area (acres): 43.10 SCCWRP Lateral Channel Susceptiblity (H, M, L): Low (Lateral) SCCWRP Vertifical Channel SuscepUblity (H, M| L): Low (Vertical) Overall Channel Susceptibility (H, M, L): LOW Lower Flow Threshold (% of 2-Year Flow): 0.5 ID Type BMP ID Description Area (ac) Pre-Project Cover Post Surface Type Drainage Soil Slope 28222 Drains to LID BMPS DA76-AC 0.44 Pervious (Pre) Concrete or asphalt Type D (high mnoff - clay soi... Steep (greater 10%) 2S223 Drains to LID BMP 6 DA76-RF 0.99 Pen/ious (Pre) Roofs Type D (high mnoff - clay soi... Steep (greater 10%) LID Facility Summary BMP ID Type Description Plan Area (sqft) Volumet (eft) Volume 2(eft) Oriflce Flow (cfs) Orifice Size (inch) BMP 6 Bioretention DA76 3132 2612 1879 0.175 2.00 http://uknow.brwncald.com/wastewater/Toolkits/Watershed/SiteToolkit/ReportResult.aspx?pid= 138617&bid=SDC-0001 &sic-n... 6/20/2013 Report Result ofl Project Summary Project Name LA COSTA TOWN SQUARE Project Applicant PDC Jurisdiction City of Carisbad Parcel (APN) 223-060-32 Hydrologic Unit Cartst)ad Compliance Basin Summary Basin Name: LCTS Receiving Water: ENCINITAS CREEK Rainfall Basin Oceanside Mean Annual Precipitation (inches) 13.3 Project Basin Area (acres): 43.10 Watershed Area (acres): 43.10 SCCWRP Lateral Channel Susceptiblity (H, M, L): Low (Lateral) SCCWRP Vertifical Channel Susceptiblity (H, M. L): Low (Vertical) Overall Channel Susceptibility (H| M, L): LOW Lower Flow Threshold (% of 2-Year Flow): 0.5 Drainage Management Area Summary ID Type BMP ID Description Area (ac) Pre-Project Cover Post Surface Type Drainage Soil Slope 28222 Drains to LID BMPS DA78-AC 0.42 Pervious (Pre) Concrete or asphalt Type D (high mnoff - clay soi... Steep (greater 10%) 28223 Drains to LID BMPS DA78-LS 0.13 Pervious (Pre) Landscaping Type D (high runoff - clay soi... Steep (greater 10%) 28224 Drains to LID BMPS DA78-RF 0.36 Pervious (Pre) Roofs Type D (high mnoff - clay soi... Steep (greater 10%) 28225 Drains to LID BMPS DA78-SW 0.17 Pervious (Pre) Concrete or asphalt Type D (high mnoff - clay soi... Steep (greater 10%) LID Facility Summary BMP ID Type Description Plan Area (sqft) Volume 1(cft) Volume 2(cft) Orifice Flow (cfs) Orifice Size (inch) BMPS Bioretention DA78 2139 1784 1283 0.134 ! 1.00 http://uknow.brwncald.com/wastewater/Toolkits/Watershed/SiteToolkit/ReportResult.aspx?pid=138617&bid=SDC-0001&sic=n... 6/20/2013 Project Summary Project Name 1 - LA COSTA TOWN SQUARE - COMMERCIAL - 1 Project Applicant PDC Jurisdiction City of Carisbad Parcel (APN) 223-060-32 Hydrologic Unit Carisbad Compliance Basin Summary Basin Name: LCTS Receiving Water: ENCINITAS CREEK Rainfall Basin Oceanside Mean Annual Precipitation (inches) 13.3 Project Basin Area (acres): 43.10 Watershed Area (acres): 43.10 SCCWRP Lateral Channel Susceptiblity (H, M, L): Low (Lateral) SCCWRP Vertifical Channel Susceptiblity (H, M, L): Low (Vertical) Overall Channel Susceptibility (H, M, L): LOW Lower Flow Threshold (% of 2-Year Flow): 0.5 Drainage Management Area Summary ID Type BMP ID Description Area (ac) Pre-Project Cover Post Surface Type Drainage Soil Slope 26995 Drains to LID BMP 9 DA79-AC 0.34 Pervious (Pre) Roofs Type D (high runoff - day soi... Steep (greater 10%) 26996 Drains to LIO BMP 9 DA79-LS 0.13 Pervious (Pre) Landscaping Type D (high runoff - day soi... Steep (greater 10%) 26997 Drains to LID BMP 9 DA79-SW 0.23 Pervious (Pre) Concrete or asphalt Type D (high runoff - day SOL.. Steep (greater 10%) 26999 Drains to LID BMP 10 DA80-AC 0.2S Pervious (Pre) Roofs Type D (high runoff - day soi... Steep (greater 10%) 27000 Drains to LID BMP 10 DA80-LS 0.04 Pervious (Pre) Landscaping Type D (high runoff - day soi... Steep (greater 10%) 27001 Drains to LID BMP 10 DA80-RF 0.04 Pervious (Pre) Roofs Type D (high runoff - day SOL.. Steep (greater 10%) Project Summary Project Name LID Facility Summary BMP ID Orifice Size (inch) BMP 3 Bioretention + Vault DA83 305 917 BMP 4 Bioretention + Vault DA84 766 2300 0.00 0.00 0.026 0.053 0.7 1.00 ATTACHMENT 6 URBAN GREEN® BIOFILTRATION SPECIFICATIONS AND DETAILS IJrbanGreen™ Sformwafer Solutions from Contech SoturioK Jus/- (::?£)(- JCti^sfcK:.. It's simple to choose the right low impoct development (LID) solution to achieve your runoff reduction goals with the Contech UrbanGreen Staircase. First, select the runoff reduction practices that are most appropnate for your site, paying particular attention to pretreatment needs. If the entire design storm cannot be retained, select a treatment best management practice (BMP) for the balance. Finally, select a detention system fo address any outstanding downstream erosion. WEI Surface Infiltration Subsurface Infiltrafion Rainwater Harvesting I Biofiltration I ,, Filtration i Hydrodynamic Separation © 2012 Contech Engineered Solutions LLC . TM \ Learn more about ail of our stormwater fechnologies at www.ContechES.com/u^b^(,^.x.<,M JrbanGreen™ SioFilfei Where stormwater runoff mitigation goals can't be met through infiltration and rcnwater harvest,n"l biofiltration can provide a high level of freatment and reduction of runoff volume due to soil saturation. The UrbanGreen BioFilter is a compact, versatile and reliable alternative to conventional designs. The UrbanGreen BioFilter soil media is optimized for pollutant removal, hydraulic conductivity and plant vitality. Pollutants are primarily removed by filtration during a storm event and are transformed, assimilated and/or absorbed between runoff events by the microbiology within a soil ecosystem. The UrbanGreen BioFilter may also include one or more StormFilter cartridges which provide reliable pollutant removal for the portion of fhe design storm that e.xceeds the capacity of the biofilter bay. t\6ri( • Two well-known and accepted practices in one system - Biofiltration and media filtration • Proven removal capability ~ >95% solids removal (mean particle size 25 um) • Integrated bypass - eliminates cost of an additional bypass inlet. Offline designs also available. • Easy installation - Delivered on-site with all intemal components installed, ready to lift and place • Multiple inline and offline sizes available to meet site-specific needs • Aesthetic landscape solutions will enhance the sife Inline and Inline XP units can be connected together fo eliminate junction structure for a lower nstalled cost '^""r Levels of Treatment in One - Inline Models ' —™-. — . • Dry weather runoff and small storms are absorbed by the biofiltration media and returned to the atmosphere c'iorilryr.A'i.r^i'X: • Medium size storms are treated by biofiltration and released downsfream Remaining water qualify flow is treated with the StormFilter cartridges Peak events are bypassed before reaching the treatment bays With multiple sizes and add-on filtration options, you can easily specify the nght system for your site. Stormwater Management StormFilter® Cartridges: • Expand capacity to reduce system size Extend life between maintenance events "f 'A -L IK. b 0^. >A ri? y f, n 6 i ^ f- iff?, r D11 i V t K- S... • Optional infiltration rates from 5 to 100 in/ hr (125 to 2540 mm/hr) fo meet approval standards. • Flow controlled outlet to maximize system longevity and perfoimance. • Vertical drop into fhe system to collc-ct debris Without clogging inlet opening. • Optimized medio fo meet standard guidelines for easy approval. • Integrated bypass reduces cost by eliminating downstream structures. Optional offline sizes Without integrated bypass available. \ Learn more about the StormFilter at www.ContechES.com/sf-o^iMfilf-tK- Curb Inlet Capacity is the amount of flow that can enter through a curb inlet This is basert r.r, I I • conditions including depth of flow in the autter rnrh or,«nino A1 J 'met. Ihis is based on local requirements and site (sag or on-grade). ' ' ^ "'*^' ^"^^^'^^ ^"'^ 9^^^^ design and location of the curb inlet Vault Size (in) Biofiltration Only Media Surface j StormFilter I Treatment Area j Cartriclges [ Capacity* <^'' ! I (gpm) r [cfsj components. Integrated Bypass Capacity (cfs)~~ 4X6 49 17 6X8 49 41 6X12 ____49__| 65 8X16 49 121 Biofiltration & Filtration 4X6 49 6X8 49 6X12 49 8X16 49 NOTE: Non-sfandard/tusfom depths and configurations available Confatt jfour locol Contech representative for more information. 2^33or5^33j Inline model* 1 Offline - Bypass flows are r 1 42" Rim to Invert. outed externally. All depths are Vault 1 Size Media Surface Area Treatment Capacity* Throat Length (in) (ft=) (gpm) (cfs) (ft) 4X4 16 16 0.036 4 4X6 24 24 0.054 6 or 4 4X8 32 32 0.071 8 or4 6X6 ' 36 36 0.080 1 . 6 4X12 48 48 0.107 12 or 4 6X8 48 48 0.107 8 or 6 6X10 60 60 0.134 10 or6 6X12 72 72 0.161 12 or 6 7X13 91 91 0.203 •Cartridges are optional for these models Offline model Biofiltration Applications Combine biofiltration with subsurface infiltration to expand runoff reduction capacity. Create small drainage areas and use multiple units in parking lots. Add volume storage upstream. Slotted Drainand pervious pavers can extend the inlet capacity and inlet location for challenging drainage areas. Multiple offline models are also available where separate high flow bypass drainage inlets may be required. Installation and Maintenance • On-site planting and activation included with every system • Straightforward and simple to maintain - Clean biofiltration bay with simple landscape tools (rake and shovel) • Extended maintenance interval - Biofiltration extends cartndge maintenance inten/als to 2 - 3 years No confined space entry required - Everything can be accessed from the surface Installation and Maintenance Manuals available www.ContechES.com/biofil f-ti^ An elementary school utilizes the UrbanGreen BioFilter in a busy porking lof, •* i Next Steps Read Biofilfrafion - Design, Operation and Maintenance Considerations available at www. Co ntech ES. CO m/U.K-bi>,^^jKtx^^ to^i'A^Jiv with iXs We're always available to make your iob easier. Search for your local rep at v^ww.ContechES.com. While you're there, be sure to check out our upcoming seminar schedule or request an in-house technical presentation. StfX.yt oX. p>D^''-C^ If you are ready to begin a project, you can find fhe UrbanGreen BioFilter specification, standard details, design guide and more on our website at www. Co nfech ES. CO m/biof 11 ttir. To use the Land Value Calculator, visit: WMAv. Contech ES. com/[ v t (Please scroll to the bottom right to download the Lond Value Calculator) To use the Design Your Own Detention System tool, visit: www.ContechES.com/^i >^ 0 CPt s To use the Rain Water Harvesting Runoff Reduction Calculator tool, visit: www.ContechES.com/K-wh-c-w-icuUf-OK- CONTECH' ENGINEERED SOLUTIONS ©2012 Contech Engineered Solutions LLC 800.338, n 22 v/v/v/.Contech£S,com All Rights Reserved. Printed in the USA. NOTHING IN THIS CATALOG SHOULD BE CONSTRUED AS AN EXPRESSED VMRRANTY OR AN IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE. SEE THE CONTECH STANDARD CONDITIONS OF SALE (VIEV^ABLE AT VAVW.CONTECHES.COM/COS) FOR MORE INFORAMTIOH feet Sodal Wifti UsI UGBF Brochure 1/12 SM Ws print our brochure! antirely on Forest Stewardship Council certified paper FSC certification ensures that tho paper in our brochures contain fiber from well- managed and responsibly harvested forests that meet strict environmental and socioeconomic standards. URBANGREEN# . UrbanGreen™ BioFilter Design, Operation and Performance CONTECH ENGINEERED SOLUTIONS BioFilter UrbanGreen™ BioFilter Overview The UrbanGreen - BioFilter is an enhanced biofiltration system that combines nature's ability to treat stormwater runoff with the proven performance capabilities of cartridge-based media filtration. This combination of biological and engineered media filtration create the perfect balance for the removal of common pollutants found in stormwater runoff. Although the UrbanGreen BioFilter will complement any site It was specifically developed as a component for low impact' development (LID) sites. UD is an approach to stormwater management, emphasizing the use of small, decentralized management practices to treat rainfall close to its source and facilitate infiltration back into the ground. The goal of LID is to maintain the predevelopment hydrology and to lower the overall environmental impact footprint of the site. Common LID practices include biofiltration, bioretention and media filtration. The UrbanGreen BioFilter incorporates all three of these processes into one system to maximize the pollutant removal capabilities. Furthermore, the UrbanGreen BioFilter is specifically designed to treat small catchment areas and can easily be combined with underground infiltration, so runoff can be treated and infiltrated close to where the rain falls This decentralized approach to managing stormwater is a core principle of LID. Basic Operation The UrbanGreen BioFilter is constructed in a curb inlet configuration and designed to treat runoff from roadways parking lots, rooftops, and other runoff generating surfaces The basic operation and components ofthe UrbanGreen BioFilter are illustrated in Figure 1, As illustrated, initial runoff enters the system and is directed by the inlet weir into the bioretention bay. A variety of complex treatment processes including physical chemical, and biological activities occur as stormwater infiltrates through the engineered soil mixture and interfaces with the root system of the tree or other vegetation. The specific components of the engineered soil mixture were selected to provide high pollutant removal and permeability while maintaining sufficient moisture content for plant growth. After infiltrating through the engineered soil mixture stormwater exits the bioretention bay via the bioretention bay underdrain which directs the treated stormwater to the outlet chamber The UrbanGreen BioFilter employs two distinct treatment components. The first is the bioretention component as descnbed above. The second is an optional media filtration component When the bioretention bay reaches its treatment capacity, runoff begins to flow through the cartridge bay inlet located at a set elevation above the surface of the engineered soil mixture This runoff is treated by Stormwater Management StormFilter^ (StormFilter) media cartndges prior to discharging into the outlet chamber. StormFilter media cartridges are among the most thoroughly tested and proven stormwater treatment devices and can be designed with a variety of media types including kCSF leaf compost, Perlite and ZPG (a blend of Zeolite, Perlite and FGranular Activated Carbon) to target the specific pollutants of concern. More information on the operation and performance of the StormFilter media cartridge can be found in the StormFilter Configuration Guide available at wwyy^ontechESxo^ The two stage treatment process of the UrbanGreen BioFilter ensures that the initial runoff from small urban catchments which commonly cames the highest pollutant concentrations is treated via bioretention. Higher flows are treated by StormFilter media cartridges. Consequently, unlike similar manufactured tree box filters, the bioretention bay is not inundated with a higher degree of runoff or pollution than it can reasonably handle without causing frequent bypass or maintenance issues NATIVE VEGETATION (numerous types available) IMLETWEIR/ INTERNAL BYPASS BIOFILTRATION BAY (engineered soil mixture) CURB INLET (other configurations available) MEDIA ^ CARTRIDGES OUTLET CHAMBER BIOFILTRATION BAY UNDERDRAIN OUTLET Figure 1: Basic Operation & Components of ttie Inline unit with cartridges The UrbanGreen BioFilter is designed with an optional internal bypass to allow runoff exceeding the capacity of both the bioretention bay and the media cartridges to discharge directly into the outlet chamber This unique feature of the UrbanGreen BioFilter protects against high flow washout of previously captured pollutants and reduces overall project costs by eliminating the ed tor external bypass structures. Treated and bypassed flows are joined in the outlet bay of the system where they can then be directed into a detention or retention system as site conditions and regulations dictate. If infiltration is feasible based on soil conditions Contechrecommends that the UrbanGreen BioFilter be Combined with subsurface infiltration BMPs such as the ChamberMaxx ' or perforated CMP system (more information available at M^2Qied3£SxorTL) to facilitate groundwater recharge and reduce runoff from the site. www.ContechES.com/biofilter Design Process The UrbanGreen BioFilter provides a vanety of stormwater management and development benefits including a high level of removal of the primary pollutants of concern, unconstrained placement ofthe system on the site, improved aesthetics, improved air quality and potential LEED credits. Another benefit IS the simple sizing process for this technology The UrbanGreen BioFilter is available in multiple sizes and configurations to allow for maximum efficiency If the system IS a combination BioFilter and Media Filter, the total treatment capacity is the aggregate of the treatment capacities of the bioretention bay and StormFilter media cartridges. The design infiltration rate of the bioretention bay is controlled by the initial media permeability and a flow control onfice. Although the infiltration rate may vary in different jurisdictions, 100 in/ hr (approximately 1 gpm per square foot) of surface area is the typical design infiltration rate. The surface of the engineered soil mixture varies with model size for ultimate specification flexibility. Testing has shown that the engineered soil mixture in the bioretention bay can infiltrate at a rate of up to 500 in/hr at the design driving head of 6 inches, however an outlet flow control limits the rate so significant pollutant loads can accumulate before the media drops below the design infiltration rate. Using an outlet flow control to control infiltration rates rather than the media itself allows soil with a higher void volume to be used This substantially decreases the frequency of maintenance because there is more storage volume for captured pollutants within the soil media. It also improves performance by reducing velocities in the pore spaces within the media. The treatment capacity of the media cartridge portion of the UrbanGreen BioFilter is based on treating runoff at a rate of 2 gpm per square foot of cartridge surface area. Like the soil mixture, the media cartndges are designed with a flow contiol so flow through each cartridge is restncted to the design rate ' This feature improves both the performance and longevity of the cartridges. Local regulations will typically determine how much flow needs to be treated. Many regulatory agencies specify a water quality "design storm" such as a 6-month or 1-year retum period storm event. Refer to local guidelines for the calculation of required design storm. Once the treatment flow rate has been determined, simply divide that amount by the total treatment capacity of the UrbanGreen BioFilter to determine the number of units needed. When placing the system on site, there are few constraints on the location of the UrbanGreen BioFilter system (unlike similar systems that cannot be placed at the low point of a parking lot or require unidirectional flow along a curb face in order to function). Once a location forthe UrbanGreen BioFilter has been determined, compare the anticipated peak conveyance flow with the bypass capacity to ensure that the system has sufficient capacity to handle these higher flows. Two hydraulic controls impact the bypass capacity of the UrbanGreen BioFilter. The throat opening controls the hydraulic capacity as a function of the opening width, allowable top width, gutter cross slope, manning's "n," and other relative factors. State and local junsdictions typically provide inlet desiqn guidelines for flow hydraulics. (If this information is not available refer to the FHWA HEC 12 Drainage of Highway Pavements The second hydraulic control is the internal bypass weir The crest elevation is 7 inches below the grade break point of the curb opening inlet at the face of curb and has a weir length that vanes with the model type and size. It is a sharp crested weir The capacity of the bypass weir is calculated using the discharge equation, 0 = cLH' ^ with a c of 3.3. For example, with 7 inches of driving head, a discharge coefficient of 3.3, and a weir length of 2'4", the peak bypass capacity is 3.4 cfs. This is given the conservative assumption that there is no flow through the treatment system itself in the event that proper maintenance practices are not observed. The UrbanGreen BioFilter has been hydraulically tested and evaluated for scour at peak flows with results showing that no scour was present in the system. These observations indicate that the system could handle higher flows without compromising performance. The maximum bypass capacity of the UrbanGreen BioFilter is therefore a function of the maximum allowable depth of flow at the curb face as defined by the goveming jurisdiction. This substantial internal bypass capacity is a key advantage of the UrbanGreen BioFilter as it eliminates the need for additional external structures. However, if the bypass capacity of the UrbanGreen BioFilter is less than the anticipated peak conveyance flow rate, then an external bypass may be used. www. Contech ES. com/biofilter Performance Testing As part of the development of the UrbanGreen BioFilter, several soil mixtures were subject to large-scale column tests in'order to identify a combination of soil components that offered the best combination of porosity, conductivity, treatment capacity, water retention capacity and performance (de Ridder, 11/17/08). Testing was conducted using an apparatus that simulated a 1.8- ft^ section of a full-scale UrbanGreen BioFilter soil bed. Experiments included: 1. Retention ~ water retention characteristics 2. Head Loss - stage discharge relationships 3. Sediment Removal - assessment of sediment removal capabilities 4. Nutrient removal - Phosphorous removal capabilities Two mixtures were identified for use with the UrbanGreen BioFilter. The West Coast 4P Blend consists of a specific mixture of sand, processed leaf compost, porous aggregate and special additives. The East Coast 2P Blend consists of natural sand and sufficient organic matter for plant growth. With respect to water retention, a fresh sample of the chosen soil mixture demonstrated a 1-hr specific retention (ratio of volume of water retained against gravity in 1 -hr to the total volume of soil) of 0.32. These values were similar to those observed for soil mixtures with particle size distnbutions that were much finer than the chosen soil mixture. The biofiltration component of the UrbanGreen BioFilter treats stormwater at rates up to 100 in/hr The high conductivity of the chosen soil mi.xture provides the desired hydraulic loading rate at a much lower driving head (Figure 2). This suggests that the soil mix allows the system to operate at design hydraulic loading rates for an extended period of time despite continuous interstitial sediment accumulation. Sediment removal charactenstics of the chosen soil mix were very high. Greater than 90% removal was observed at the design operating rate of 100 in/hr using the Sil-Co-Sil 106 sediment removal testing standard (SG = 2.65, dSO = 25-um). More information on the evaluation of the UrbanGreen BioFilter is available upon request. 200 250 Figure 2 50 100 150 Hydraulic Loading Rate (in/hr) Hydraulic Loading Characteristics ofthe UrbanGreen BioFilter C«INTECH ENGINEERED SOLUTIONS .02012 CON TECH EflGII lEERED SOtUTIOtIS, UC 300-338-1122 ^v.w.ConlechES.com •Ml Riglits Reser.ed- printed in Ine USA. Contech Eng,„eered Sol.„ons LLC provides s„e »l„t,ons forthe cvj ang:neenng ,„dus,„ Contech', p,n(ol,o includes bndges, dromoge, sonitari,. sewer, stormwote, ond eorth stobrfootion products. Fo, informotion on other Contech div.ion otfenngs, /r.it ContechES com or coll SOO 338 1 122 The productlsl descnbed ,™y be protected by one or more of the (ollow.ng US ootents- 5 322 629- 5 624 576- 5,707,527: 5,759,415; 5,788,848, 5,985,157; 6,027,639; 6,350,374; 6,J06 218; 6 641 720-6 511 595-' 6,649,048; 6,991,1 14; 6,998,038; 7,186,058; 7,296,692; 7,297,266; reloted foce.gn poten. or ;,her pote'nis pend.ng. The S,o,mv,o.er Monogement StormFilter, ,',tf5 ond CDS are trademorb, registered trodemorfcs, or licensed trodemori-, of Contech Engineered Sol>;l,ons LLC LEED is a registered trodemort of the U.S, Greer, BwUing Council NOTHING IN THIS CATALOG SHOULD BE CONSTRUED AS AN EXPRESSED WARRANTY OR AN IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE, SEE THE CONTECH STANDARD CONDITIONS OF SALE MEWAPLE AT W\WCONTECHES.COM/COSl FOR MORE NFORMATION iupport Drawings and specifications ars avoiloble at contechstormwoler.com, • Site-specific design support is available from our engineers. ub_bf_design guide 06/12 CC^NTECH' ENGINEERED SOLUTIONS PERFORMANCE OVERVIEW Performance of the UrbanGreen- BioFilter with 2P Biomedia for the Removal of Suspended Solids, Total Phosphorus and Heavy Metals from Stormwater Runoff Introduction The effectiveness of biofiltration systems as a means of treating urban runoff is well documented A growing body of biofilter performance data demonstrates that flow through biofiltratZ y consistently remove high levels of many common stormwater pollutants. A biofi^ r rn^oTed fo several years at the University of Mew Hampshire Stormwater Center achieved 870/ Xnr.i . ^ . Solids(TSS) removal, ,9% Total Petroleum Hydrocarbons-Diesel e ipt 20097A r ')7'^'^^f'^ —' -d-ed avera e annua?peaTfLt^^^^^^^^^ au/o IK, y//o LUU and 67% Oil and Grease (Yu et al, 1999). Biofiltration combines physical filtration and reactive processes with biological processes to maximize the removal of stormwater pollutants. Biofiltration systems are typically composed of a so mTdiaT at includes an organic component such as compost, peat or mulch as well as native vegeta ion aTof w ch fii e^s '^''''T.rT 7''" ' "^"'^^^'^ ^^^^-^ °^ svstem where t ond and^^^^^^^ filters through the soil media. The soil media filters particulate pollutants both at the surface as wei a within the media bed. The addition of an organic component such as compost or p t tem d a a ows the system to sequester dissolved pollutants through reactive processes such as cation exchTng Th inclusion of vegetation also adds a number of benefits to the system including nu ri nt upt e increased evapotranspiration, promotion of beneficial bacterial growth, improved aesthetics and increased hydraulic conductivity. While much of the pollutant load is removed v titration z^z:^:::::^:~--------"^ UrbanGreen BioFilter The UrbanGreen™ BioFilter is a high capacity tree well style biofilter housed within a concrete vault The biofilter IS modeled after conventional biofilter designs with a few notable enhanc men o maximize performance, hydraulic conductivity and longevity The engineered biomeHiri. ^ !t . an optimized blend of sand and peat granules. The cLsistent, en f:::^^^^^^^^^ e ch unit performs as intended, and eliminates the complications and uncertainty caused by t y n^to blend a biofiltration media to specification onsite. The UrbanGreen BioFilter utilizL ^interna h' n - - oniin:ro:t^rnee?fr; The UrbanGreen BioFilter has a design saturated hydraulic conductivity (infiltration rate) of 100 in/hr and a media bed depth of 24 inches. An outlet flow control limits the nfiltrat on ate so sLnifiran pollutant loads can accumulate before the media drops below the d n nfi trati n and maintenance is required. Unregulated, 2P biomedia has been shown to have a satur ted vdrau ic cor, uctivity exceeding 300 in/hr. Using an outlet flow control rather than the mel to contri infiltration rates allows soil with a higher void volume to be used and makes system per orLnce m cH more consistent over time. This substantially decreases the frequency of maintenance bru Lr more storage volume for captured pollutants within the biomedia Performance is aknT^n TJ reducing velocities in the pore spaces Within the biomedia (Contech 2011) ' The UrbanGreen BioFNter utilizes biomedia with a high hydraulic conductivity and operates as a deoth ter rather than a surface filter, which is the principal of operation for lower infiltration a^e b ofNte rA re nt review of the availabie performance data on similar high rate biofiltration syste^ o luded me ian ffl 7"""*"^'°"^ ^^^'^^^'^ ^^"-"'^ studies were generally equal to or lowe n median effluent concentrations for the biofilter and media filter classes of BMPs reported in the International Stormwater BMP Database" (Lenth et al, 2010). reported in the 2P biomedia The UrbanGreen BioFilter utilizes a 24 inch deep bed of 2P biomedia to treat urban runoff. 2P biomedia (DSO = 4 mm) consists of an engineered blend of coarse sand and peat granules Thk unJl. .^^^J.^ was created specifically to achieve high levels of pollutant removalThilfma Tainan a^ i nfZ^^^^^^ rate w lie maximizing longevity and minimizing the potential leaching of nutrients froft e tg^ "^ onten For most applications 2P biomedia has a design infiltration rate of 100 in/hr corlpond to 1.04 gallons per minute per square foot of biomedia surface area. <-orresponaing to Suspended Solids Removal T'' S'°^"ter to sequester suspended solids with 2P biomedia at e design inf. tration rate of 100 in/hr a series of column scale trials was initiated using Sil-Co S P 106 n s r^'d H °. '"^'-''^ ' g-dation of silica par les t t ha EcoToriWA^^^^^^^ 'T'"'"* ^"^'^^'"^ ^-hington Dep tm t Ecology (WADOE), for use in evaluating stormwater management practices for solids retention As depicted in Figure 1, Sil-Co-SiP 106 has a median particle size (dSO) of -25 ^m 3 0.4 10 100 Particle Size (pm) Figure 1. Particle Size Distribution tor Sil-Co-Sil 106 Silica Gradation IOOO concentrations between 0 and 300 mg/L. The 2P biomedia showed excellen retenttn of so i^sln a^^^ trials. Based on the regression of EMC method the 2P biomedia removed 93% of Si - "o SH^^^ the seven trials, the results of which are plotted in Figure 2 (Ma and Tracy 2012I) ' ©2012 Contech Engineered Solutions, LLC www.ConfechES.com Page 2 of 7 PERFORMANCE OVERVIEW 2P Biomedia 24 inch @ 100 iahr 200 i50 'J •/i IOO 50 • Raw (lita —Lower 95»'o — Hiahw95?» y-0.07j 'OOS 8' - 0.99 Influent SSC. mgX 40O Figure 2. Comparison ot tnt.uent and effluent Sil-Co-SII X06 concentrations for seven 2P biomedia performanJe trials at 100 in/hr To demonstrate the ability of 2P biomedia to remove Sil-Co-Sil- 106 at higher infiltration rates a second set of performance trials was conducted at a design infiltration rate of 200 in/hr. Aside from doubling he design infHtration rate, all test conditions were kept consistent with the aforementioned Sil-Co-Sil' 106 rials conducted at 100 in/hr. Seven trials were conducted at influent concentrations between 2 o Sil Jo snL!7 r Tf"""" °' '''' ' '''' °f 2P media removed 89% of Sil-Co-Sil 106 at a design infiltration rate of 200 in/hr. The results of these trials are plotted in Figure 2P Biomedia 24 mch '3 200inhr 200 150 v! 100 • Raw data —Lower SS'o ~ Higher95% y-O.lU +2.05 R" - 0.97 IOO 200 ioO InSiueat SSC, raj L 400 Figure 3. Comparison of influent and effluent Sil-Co-Sil« 106 concentrations for seven 2P biomedia performance trials at 200 in/hr ©2012 Contech Engineered Solutions, LLC www.ContechES.com ge3of7 n addition to the Sil-Co-Sir 106 trials, additional testing was carried out to assess the performance of 2P biomedia for a wider gradation of stormwater solids and total phosphorus. Actual stormwater solids were screened to remove all particles larger than SOOum and then added to source wate Tan av r ge mf uent concentration of 156 mg/L. Hourly sampling was conducted over multiple days result ng in a dataset spanning 30 hours of system operation. The 2P biomedia demonstrated excellent reteZ of studv 1°^ /? T r ^""^^ -"^^ concentration dur g the stu^y was 2 mg/L. As shown in Figure 4, the average removal of suspended solids during this study v^a! •a" u 100 80 60 40 20 Average removal = 99% Average influent SSC = 1 56 mg/L 0 10 15 20 25 30 Testing titne, hrs Figure 4. Removal of stormwater solids less than 500 ^m by 2P biomedia at a a design infiltration rate of 100 in/hr Phosphorus Removal In order to assess the ability of 2P biomedia to remove phosphorus from stormwater runoff influent and effluent samples were also collected and analyzed for total phosphorus. Stormwater soliJs known to contain phosphorous were screened to remove all particles larger than SOOum and the d ed o sir e water at an average solids concentration of 156 mg/L. All samples were sent to an i dependent th^^^^ party analytica laboratory for total phosphorus analysis. The resulting average influent o al Phosphorus (TP) concentration was 0.128 mg/L. Hourly sampling conducted over multip days and SSylZT, " °' 'demonstrated that the 2P biomedia remo d n a. r e 83/„ of the TP. The average effluent TP concentration for the study was 0.021 mg/L very close to the detect-on limit of 0.02 mg/L. The results of these trials are plotted in Figure 5 (Ma and Tr 7y 20 'J^ ©2012 Contech Engineered Solutions, LLC wvw.ContechES.com Page 4 of 7 s a. 100 95 90 85 80 75 70 Average influent TP = 0.128 mg/L Average effluent TP = 0.021 ma/L Non-cietect limit = 0.02 mg/L Average Removal = 83% 0 ID 15 20 25 30 Testing time, hrs Figures. of total phosphorus over time by 2P biomedia at a deslgninfiltration rate of 100 in/hr Heavy Metals Removal Heavy metals such as zinc, copper and lead are commonly transported by stormwater runoff and oose a metals a, varying „rge, i„„„en, ctcen ra IsVl '^-^J »' ^«-"< Run# Target Influent Dissolved Cu (CuCla-ZHjO) ppb 20 50 100 Target Influent Dissolved Zn (ZnCIa) ppb 100 200 400 Target Influent Dissolved Pb (PbClj) Table 1. Target Influent Concentration for UrbanGreen BioFilter Dissolved Metals Removal TrialsT ppb 20 50 100 Results of the dissolved rrietals trials were highly favorable. The UrbanGreen BioFilter removed 95% of dissolved zmc based on linear regression of all trials. The system removed 840/ nf i 1 based on linear regression of all trials. Removal of dissolved e d : rmore modest wi h i slT" achieving an average removal of 36% for all trials. Additional research is needed tn" I ^ ©2012 Contech Engineered Solutions, LLC www.ContechES.com Page S of 7 concentrations well below the intended target. More importantly, the system still achieved positive Pollutant Percent Removal Diss. Zn 95 Diss. Cu 84 Diss. Pb 36 Table 2. Results of UrbanGreen Biofilter Dissolved Metals Remova Laboratory Trials wi of lOOin/hr. with a 24 inch bed of 2P Biomedia at a Hydraulic Rate Overall, the UrbanGreen BioFilter showed excellent remnuai nf HICC^I, „^ . , concentrations. Retention of dissolved -tat" lirlo^^ht treT ;a^X^^^^ capability of systems only targeting particulate metals. exceeds the Conclusions solids, total Phosphor, and dissolved .etais ,roVs,r::«e:^lt ^'S^^ infiltration rate ot 200 in^hr^'h -1,1^. cr„^:a,r aSnrrr.Sltrr''.;'; "1" removed 89% of Sil-Co-Sil® 106. ^ biomedia ^trrrLitnd ^sxTo^^^^^^^^^^^ - study the 2P h^media retained on average 83% o~;i;Z ,::dTete a^e^^^^^^ concentration during the 30 hours of sampling was 0.021mg/L. Three laboratory trials spanning two days each showed that a 24 inch deen h^d nf 7P hi„ w at a controlled infiltration rate of lOOin/hr was able to remove 5% of di ol^^^^^^ ZT regression. Three additional laboratory trials demonstrated that a 24 inVh de p bed o 2P biomedi: operated at a controlled infiltration rate of lOOin/hr was able to remove 84% 'rd sso ved copp r ^sed on linear regression. Three laboratory trials spanning two days each showed tha a"tinch d^p be^^^ - - was ab. to reduce disSreal Hydraulic testing confirmed that the engineered 2P biompdia hi«nH hac • u , e«ceed,„. 300 in/hr. Pertormance .rials^en,ons.r:,e^^^ htrl^on'ap'pSnf'''"''"" °' ^™ '"'"' ™''"^ "'^"^ ,o, hfgh^'rat e;r.t;at;t;:e\tgtrh:roV^'' -"^ - = ©2012 Contech Engineered Solutions LLC www.ContechES.com Page 6 of 7 References GuTde'tnl' '"'^v' ^ Practice Design Guide Volume 2 Vegetated Biofilters. Cincinatti, OH, USEPA. Available Online- http://www.epa.gov/nrmrl/pubs/60nrn4121/60Qr04171;^ pHf """"='°™<- Ma, J. and Tracy, K. {2012a). Removal of Sil-Co-Sil 106 by 2P Biomedia (DSO ~ 4 rr,m» mn • /u ... inch Media Column Testing. Portland, OR. Author. ' ~ ""^^^ '""^ Ma, J. and Tracy, K (2012b). TP Removal Using UG 2P Biomedia. Portland, OR. Author Ma And Tracy, K. (2012c). Removal of Dissolved Metals and Nutrients by 2P Biomedia. Portland, OR. Lenth, J., Dugopolski, R., Quigley, M., Poresky, A., and Leisenring, M. (2010) Filterra Bioretentir^n ystems: Technical Basis for High Flow Rate Treatment and Evaluatio of Storlat r S Performance. Seattle, WA. Author. -^luimwaier quality AvtlTJle Oniinr ™^ httpy/www.„nh,ed.i/unhsc/.slteV,.nhedu.unhsr/fll,.,/p„h. .^..^s info/Pnog „„l.., .„r.,. r^f ,1": """f; 5'-=-. ("99). -field Testing of Ul,ra-„rban BMPs". Proceedings of ©2012 Contech Engineered Solutions LLC www.ContechES.com Page 7 of 7 C0NTECH ENGINEERED SOLUTIONS URBANGREEN BioFilter Maintenance Manual BioFilter UrbanGreen BioFilter'" Inspection and IVIaintenance The UrbanGreen"' BioFilter should be inspected at regular intervals and maintained when necessary to ensure optimum performance. The rate at which the system collects pollutants will depend more heavily on site activities than the size of the unit (i.e. unstable soils or heavy winter sanding will cause the system to fill more quickly but regular sweeping will slow accumulation). Maintenance of the UrbanGreen BioFilter should be performed by a qualified professional who has experience with maintenance of stormwater management systems. For more information, please contact CONTECH at 800.338.1122 or info@contech-cpi.com. inspection and Routine Maintenance Inspection is the key to effective maintenance Inspect annually unless local regulations or site conditions require more frequent inspection. Routine maintenance, defined as trash and debris removal and general upkeep, should be performed during each inspection if necessary First record the height, width and condition of the tree A sample log is provided. Once these recordings have been taken, the tree grate should be removed to observe the bioretention bay Any trash and debns that has collected here should be removed and disposed of appropriately As with all media filtration systems, captured pollutants and sediments will accumulate on the surface of the engineered soil mixture over time, reducing the treatment capacity of the system. If captured pollutants are observed to have occluded the media surface, or if standing water IS present in the biofiltration bay dunng dry periods then maintenance of the top layer of soil mixture is required Studies have shown that the majority of all captured pollutants reside in the top 2-3 inches of soil and therefore It IS hkely that only this layer needs to be replaced (California Stormwater Quality Association (CASQA) New ^^^JPn^ent and Redevelopment Handbook, January Replacement soil is available from CONTECH. Please note that when replacing the engineered soil mixture, the energy dissipation rocks which protect the inlet from scour should be collected and set aside for use with the new soil. Once the new soil has been installed, the energy dissipation rocks should be placed back at the inlet. Once the bioretention bay has been inspected and maintenance procedures completed, the tree grate placed should be put securely back in place. As part of the standard terms of system purchase, pNTECH will supply routine maintenance services as descnbed herein within approximately 1 year of system activation. Associated maintenance log records will be made available to the owner upon request. Irispection and maintenance of the media cartridge bay are also critical to the overall performance of the system Inspection should be performed at the same time as inspection of the bioretention bay Remove the cover over the media cartridge bay and observe the accumulated pollutants within the chamber. If more than three inches 0 sediment ,s found on the chamber floor or on the tops of the cartndges, then cartndge replacement should be performed. Additionally ,f standing water resides in the chamber for greater than twenty-four hours after a storm event, then cartridge replacement should be performed. Depending on site and climatic conditions, mamtenance frequency of the media cartridges should range from 3 to 5 years Instructions for cartndge replacement are provided m the Non-Routine Maintenance section below All observations from inspection of the media cartridge bay should be recorded in the maintenance log. Non-Routine Maintenance Non-routine maintenance is defined as clean-out of the media cartndge bay and replacement of cartndges rn^frT' '"''"^^'^ by contacting ' CONTECH at 800.338.1122. The first step in the clean-out of the media cartridge bay IS to remove the sediment and debris that has collected in this chamber, A vacuum truck or manual operation can be used for this procedure. Once the sediment and debns has been removed, the existmg cartridges should be removed from the system. Cartridges are connected to the underdrain manifold by a simple quarter-turn connection and are easily disconnected. Once the cartridges are removed from the vault any remainmg sediment and/or debns should be cleaned out The inal step m the cartridge replacement process is to ' insta I the replacement cartndges. Replacement cartndges should be installed securely to the quarter-turn connection system and the cover placed securely back over the media cartndge bay General Maintenance Notes All OSHA standards for health and safety should be foltowed at all times when inspecting or maintaining the UrbanGreen BioFilter. Furthermore, disposal of pollutants removed from the UrbanGreen BioFilter should be performed in accordance with all regulatory requirements UrbanGreen BioFilter Inspection & IVIaintenance Log Project Name: Location: Date of Installation: 1 Date Tree 't Height/WfdtIV Condition Bioretention Bay ' Routine Maintenance Performed Media CartildgeBay Observati"ons Media Cartridge Bay Maintenance •.^-v.Performed.-i'..,A*/- — — — — — ---— - — 1 UrbanGreen BioFilter Inspection & IVIaintenance Log Project Name: Walmart Location: Anywhere, USA Date of installation: 10/01/05 12/01/06 12/01/07 12/01/08 12/01/09 12/01/10 12/01/11 12/01/12 Tree Height/Width/' Condition i. Bioretention Bay Routine Maintenance Performed 367247good condition | Removed debns from chamber 387287good condition 427327needs irrigation 477387good condition 507397good condition 527427needs irngation 547407good condition Removed debris /replaced soil top layer Removed debris from chamber Removed debris from chamber Removed debris/replaced soil top laye Removed debris from chamber Media Cartridge Bay Obsen/ations Slight Sediment layer on floor 1" of sediment on floor 1 1/2" of sediment on floor 2" of sediment on floor 2 1/4" of sediment on floor 2 1/2" of sediment on floor Removed debris from chamber / replaced soil top laye | 3" of sediment on floor Media Cartridge Bay Maintenance Perfonned " None required None required None required None required None required None required Chamber cleaned/ cartridges replaced CONTECH ENGINEERED SOLUTIONS ©2012 CONTECH ENGINEERED SOLUTIONS, LLC. 800-338-1122 .vww cfjntechES.com AJ\ Rights Reserved. Printed in the USA. CONTECH Engineered Solutions, LLC. provides site solotions for the civil engineering inrJoslry. CONTECH's portfolio includes bridges, droinoge, sontor, sewer, slorr„.^oter ond eorlh stoblfaotlon prodocts. For information on other CONTECH division offerings, .sit contech-cpi com or ^oll 800.338.1 122 The produdls) described moy be protected by one or more ofthe following US patents: 5 322 629' 5,624,576; 5,70;,527; 5,759,415; 5,788,8«; 5,985,157; 6,027,639; 6,350,374; 6,406 218-' 6,641,720; 6,511,595; 6,649,048; 6,991,114; 6,998,038; 7,186,058; 7,296,692; 7,297 266; reloted foreign patents or other patents pending. NOTHING IN THIS CATALOG SHOULD BE CONSTRUED AS AN EXPRESSED WARRANTY •-.R AN UAPueO WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANf PARTICULAR PURPOSE. SEE THE CONTECH STAt-tDARD CONDITIONS OF SALE (ViEWABIE AT WVAVCONTECH-CPTCOM/COS) FOR MORE INFORMATION We print our brochures entirely on Forest Stewardship Council certified paper FSC certification ensures that the paper in our brochures contain fiber from well- managed and responsibly horvested forests that meet strict environmental and socioeconomic standards. ub bf mamtenance 02,'I2 ATTACHMENT 7 BIORETENTION BASIN SPECTIFICATIONS AND DETAILS PER CARLSBAD DRAWING 409-4C ATTACHMENT 8 HYDROMODIFICATION DESIGN FOR DETENTION BASIN BASIN 2 DETENTION BASIN AND HYDROMODIFICATION DESIGN FOR LA COSTA TOWN SQUARE - COMMERCIAL JobNo. 10-1290 Prepared: June 13,2013 Revised: June 21, 2013 Revised: July 1, 2013 Prepared by: O'DAY CONSULTANTS, INC. 2710 Loker Avenue West Suite 100 Carlsbad, Califomia 92010 Tel: (760)931-7700 Fax: (760)931-8680 Tim O. Carroll RCE 55381 Date I;\001017\_Commercial\Stormwater\Drainage\LCTS Comm_DrainageRpt_Basin2_Det_Hydromod-SWMP.DOC SECTION 1 SECTION 2 SECTION 3 TABLE OF CONTENTS INTRODUCTION Purpose of Study Scope Hydrologic and Storm Water Management Analysis Detention Basin Sizing CONCLUSION SECTION 4 Vicinity Map Existing Hydrograph Proposed Inflow Hydrograph San Diego BMP Sizing Calculator Report Results Detention Basin Depth vs Storage vs Discharge from Outlet Structure Calculations for Detention Basin with Hydromodification Detention Basin Details per Grading Plan 409-4C I:\001017\_Commercial\Stonnwater\Drainage\LCTS Comin_Drainage Rpt_Basin2_Det_Hydromod-SWlvIP.DOC INTRODUCTION The La Costa Tovra Square Commercial project is located southeast of Rancho Santa Fe Road and north of La Costa Avenue in the City of Carlsbad, Califomia (see Vicinity Map below) and is a master planned development consisting of residential, office, and commercial uses. The commercial component will consist of retail shops, a grocery store, restaurants, a gas station, and a home improvement center that includes a garden center. The commercial project is divided into two separate basins. Basin 1 drains in a southeasterly direction toward La Costa Avenue, east of Camino De Los Coches. Basin 2 drains in a southwesterly direction toward La Costa Avenue into a proposed detention basin, west of Calle Timiteo Purpose of Study This study was prepared to determine the proposed sizing for the detention basin during an 100-year storm event in Basin 2 and incorporate hydromodification flow control for a portion of Drainage Management Axeas (DMAs) that currently utilize underground vaults for hydromodification. Scope This study analyzes the proposed flow control outlet stmcture of the detention basin during hydromodification flows from a low flow threshold (0.5Q2 year) to high flow threshold (QlOyear), and peak 100-year flows for developed conditions of the site. Incorporating hydromodification flow design into the outlet structure will eliminate the need for imdergroimd vaults in a majority of the DMAs. Hydrologic and Storm Water Management Analysis The proposed developed condition flows are taken from the Hydrology Study for La Costa Town Square, dated May 29, 2013. Drainage Management Areas are taken from the Storm Water Management Plan for La Costa Town Square Commercial Project, dated May 29, 2013. EXISTING PROPOSED BASIN C Q = 54.8 CFS BASIN 2 Q = 32.2 CFS** * This flow is ultimately routed into the existmg detention basin upstream from Camino de los Coches. See appendix. ** The 100-year peak developed flow from the Proposed Basin 2 is 139.5 cfs prior to being routed through the proposed on-site detention basin. The flow shown above is the peak outflow from said detention basin. I:\001017\_Commercial\Stonnwater\Drainage\LCTSComm_DrainageRpt_Basin2_Det_Hydromod-SWMP.DOC Detention Basin Sizing Information (See Section 3 for information listed below) • The existing hydrograph was taken from the hydrology study. • The proposed inflow hydrograph for the detention basin was taken from the hydrology study. • Areas of DMAs in the Storm Water Management Plan that drain into the detention basin for hydromodification are No's. 27R, 28, 32, 38, 39, 40, 41, 42, 44, 45, 49, 50, 53, 54, 56, 59, 60, 65, 80, 83 and 84. See Drainage Management Area Map. • The San Diego BMP Sizing Calculator was used to determine the detention basin size and outflow control for hydromodification purposes. • Detention Basin Depth vs Storage vs Discharge from the outlet structure for the detention basin was designed to allow hydromodification flows to be released at the rate determined by the BMP Sizing Calculator, and also attenuate the peak 100-year flow from Basin 2. CONCLUSION The detention basin in Basin 2 is designed to provide hydromodification for DMA No's. 27R, 28, 32, 38, 39, 41, 42, 44, 45, 49, 50, 53, 54, 56, 59, 60, 65, 80, 83 and 84, while also attenuating the peak 100-year flow from Basin 2. The hydromodification flows from the detention basin will be controlled by two pipes (a 5-inch pipe at an invert of 266.19 foot elevation, and a 12-inch pipe at an invert of 268.79 foot elevation) through a 3.0-foot high concrete weir surrounding the 30-inch outlet pipe. The bottom 3.0 feet of the detention basin will serve as temporary storage for the DMAs without hydromodification. The maximum storage corresponding to the hydromodification flow threshold is 0.924 ac-ft (40,249 ft''). Flows greater than the hydromodification flow threshold will over top the 20-foot long concrete weir. The detention basin analysis indicates that the peak 100-year flow is attenuated from 139.1 cfs to 54.9 cfs. The maximum storage volume used is 1.663 ac-ft (72,440 ft^), with a maximum water surface elevation at 6.3 feet from the bottom of the detention basin. I:\0010I7\_Commercial\Stormwater\Drainage\LCTS Comm_DrainageRpt_Basiii2_Det_Hydromod-SWMP.DOC SECTION 2 I:\001017\_Comniercial\Stormwater\Drainage\LCTS Comm_DrainageRpt_Basin2_Det_Hydromod-SWMP.DOC CITY OF OCEANSIDE 'ACIFIC OCEAN OF MARCOS SITE CITY OF ENCINITAS VICINITY MAP NO SCALE EXISTING HYDROGRAPH I:\001017\_Commercial\Stonnwater\Drainage\LCTS Comm_DrainageRpt_Basin2_Det_Hydromod-SWMP.DOC RUN DATE 10/21/2008 HYDROGRAPH FILE NAIVIE Text1 TIIVIE OF CONCENTRATION 18 MIN 6 HOUR RAINFALL 2,8 INCHES B.'- - 'AREA 30.2 ACRES ,R_ ."F COEFFICIENT 0 554 _Y DISCHARGE 54.757 CFS l^Iff' " ° DISCHARGE (CFS) = 0 ^WIE MIN)= 18 DISCHARPP rec ^o TIME (MIN = 36 5 ('CFI - 3 ' TIME (MIN) = 54 DISCHARGE (CFI - I 1 TIME (MIN) = 72 D SCHARPP rec ~ I TIME (MIN =90 §SRGI &1 TIME (MIN) = 108 DISCHARGLCFI : 4 TIME (MIN) = 126 DISCHARGI CFI - 4 9 TIME (MIN) = 144 D SCHARPP PP! " A TIME (MIN = 162 D SCHARGE CFS) - 5 5 TIME (MIN) = 180 DISCHARGE CFS - A TIME (MIN) = 198 DISCHARPP PPC " t t TIME (MIN) = 324 DISCHARGE CFH ' 4 TIME (MIN) = 342 D SCHARSE (CFI - ^ ^ TIME (MIN) = 360 DISCHARGE PF^ ' o o TIME (MIN) = 378 Dl'ISf [§p1J ! o^'^ 4 4 PROPOSED INFLOW HYDROGRAPH I:\001017\_CommerciaI\Stonnwater\Drainage\LCTS Comm_DrainageRpt_Basin2_Det_Hydromod-SWMP.DOC RUN DATE 11/18/2008 HYDROGRAPH FILE NAME Textl TIME OF CONCENTRATION 7 MIN 6 HOUR RAINFALL 2 8 INCHES B I AREA 37.22 ACRES f^:-^ JFF COEFFICIENT 0 61 DISCHARGE 139.15 CFS ^VE (MIN) = 0 TIME (MIN) = 7 TIME (MIN) = 14 TIME (MIN) = 21 TIME (MIN) = 23 TIME (MIN) = TIME (MIN) = TIME (MIN) = TIME (MIN) = TIME (MIN) = TIME (MIN) = TIME (MIN) = TIME (MIN) = TIME (MIN) = TIME (MIN) = TIME (MIN) = TIME (MIN) = TIME (MIN) = TIME (MIN) = TIME (MIN) = TIME (MIN) = TIME (MIN) = TIME (MIN) = TIME (MIN) = TIME (MIN) = TIME (MIN) = TIME (MIN) = TIME (MIN) = TIME (MIN) = T 'MIN) = T -. ;MIN) = —'YMIN) = •^KmiN) = T^P^1IN) = TIME(MIN)= 238 TIME (MIN) = 245 TIME (MIN) = 252 TIME (MIN) = 259 TIME (MIN) = 266 TIME (MIN) = 273 TIME (MIN) = TIME (MIN) = TIME (MIN) = TIME (MIN) = "IME (MIN) = 1ME (MIN) = 'IME (MIN) = 'IME (MIN) = IME (MIN) = 336 1ME (MIN) = 343 IME (MIN) = 350 IME (MIN) = 357 IME (MIN) = 364 35 42 49 56 63 70 77 84 91 98 105 112 119 126 133 140 147 154 161 168 175 182 189 ^ 196 203 210 217 224 231 280 287 294 301 308 315 322 329 DISCHARGE (CFS) = 0 DISCHARGE (CFS) = 3 8 DISCHARGE (CFS) =39 DISCHARGE (CFS) = 4 DISCHARGE (CFS) = 4 DISCHARGE (CFS) = 4 1 DISCHARGE (CFS) = 4 2 DISCHARGE (CFS) =43 DISCHARGE (CFS) =44 DISCHARGE (CFS) =45 DISCHARGE (CFS) =46 DISCHARGE (CFS) =48 DISCHARGE (CFS) =49 DISCHARGE (CFS) = 5 1 DISCHARGE (CFS) =52 DISCHARGE (CFS) = 5 4 DISCHARGE (CFS) =55 DISCHARGE (CFS) = 5 8 DISCHARGE (CFS) =59 DISCHARGE (CFS) = 6 2 DISCHARGE (CFS) =64 DISCHARGE (CFS) =68 DISCHARGE (CFS) = 7 DISCHARGE (CFS) = 7 6 DISCHARGE (CFS) = 7 8 DISCHARGE (CFS) = 8 5 DISCHARGE (CFS) = 8 9 DISCHARGE (CFS) =99 DISCHARGE (CFS) = 10 5 DISCHARGE (CFS) = 12 DISCHARGE (CFS) = 13 1 DISCHARGE (CFS) = 16 DISCHARGE (CFS) = 18 2 DISCHARGE (CFS) = 26 7 DISCHARGE (CFS) = 33 3 DISCHARGE (CFS) = 139 15 DISCHARGE (CFS) = 21 4 DISCHARGE (CFS) = 14 3 DISCHARGE (CFS) =112 DISCHARGE (CFS) =94 DISCHARGE (CFS) = 8 2 DISCHARGE (CFS) = 7 3 DISCHARGE (CFS) =66 DISCHARGE (CFS) = 6 1 DISCHARGE (CFS) = 5 6 DISCHARGE (CFS) =53 DISCHARGE (CFS) = 5 DISCHARGE (CFS) =47 DISCHARGE (CFS) = 4 5 DISCHARGE (CFS) =43 DISCHARGE (CFS) = 4 1 DISCHARGE (CFS) =39 DISCHARGE (CFS) = 0 SECTION 3 I:\00I017\_Commercial\Stonnwater\Drainage\LCTS Comm_DrainageRpt_Basin2_Det_Hydromod-SWMP.DOC SAN DIEGO BMP SIZING CALCULATOR REPORT RESULTS I:\001017\_Commercial\Stormwater\Drainage\LCTS Comm_DramageRpt_Basin2_Det_Hydromod-SWMP.DOC Report Result Page 1 of 1 Project Summary Project Name LA COSTA TOWN SQUARE -COMMERCIAL Project Applicant PDC Jurisdiction City of Carlsbad Parcel (APN) 223-060-32 Hydrologic Unit Carlsbad Compliance Basin Summary Basin Name: LCTS Receiving Water: ENCINITAS CREEK Rainfall Basin Oceanside Mean Annual Precipitation (inches) 13.3 Project Basin Area (acres): 43.10 Watershed Area (acres): 43.10 SCCWRP Lateral Channel Susceptiblity (H, M, L): Low (Lateral) SCCWRP Vertifical Channel Susceptiblity (H, M, L): Low (Vertical) Overall Channel Susceptibility (H, M, L): LOW Lower Flow Threshold (% of 2-Year Flow): 0.5 Drainage Management Area Summary ID Type BMPID Description Area (ac) Pre-Project Cover Post Surface Type Drainage Soil Slope AC -DMA'S DRAINING TO DETENTION 28480 Drains to Pond BMP 2 BASIN 27R -28 -32 -38 -39 -41 -42 -44 -4.86 Pervious (Pre) Concrete or asphalt Type D (high runoff -clay Steep (greater 10%) 45 -49 -50 -53 -54 -59 -60 -65 -80 -83 -soi. .. 84 LS -DMA'S DRAINING TO DETENTION 28504 Drains to Pond BMP 2 BASIN 27R -28 -32 -38 -39 -41 -42 -44 -0.49 Pervious (Pre) Landscaping Type D (high runoff -clay Steep (greater 10%) ~-~-W-~-M-W-~-~-~-M-soi. .. 83 -84 RF -DMA'S DRAINGING TO DETENTION 28505 Drains to Pond BMP2 BASIN 27R -28 -32 -38 -39 -41 -42 -44 -1.63 Pervious (Pre) Roofs Type D (high runoff -clay Steep (greater 10%) ~-~-~-W-~-M-W-~-~-~-soi ... 80 -83 -84 SW-DMA'S DRAINING TO DETENTION 28506 Drains to Pond BMP2 BASIN 27R-28 -32 -38 -39 -41 -42 -44 -0.82 Pervious (Pre) Concrete or asphalt Type D (high runoff -clay Steep (greater 10%) ~-~-W-~-M-W-~-~-~-M-soi ... 83 -84 Pond Facility Summary Scenario Description Bottom Area (sqft) Top Area (sqft) Depth (ft) Volume (cft) Low Orifice (in) Low Invert (ft) High Orifice (in) High Invert (ft) Weir Length (ft) Weir Invert (ft) Facility Soil Drawdown (hrs) Design A DETENTION BASIN WITH 9367 11834 3 31803.1 5.00 0.00 12.00 1.6 0.00 0.00 D 8.00 HYDROMODIFICATION -POC #2 http://uknow.brwncald.com/wastewater/Toolkits/W atershed/S ite Toolkit/ReportResult.aspx?pid= 13 8617 & bid=SDC-0001 &sic=null&pcid=reportContent 7/2/2013 DETENTION BASIN DEPTH vs STORAGE vs DISCHARGE FROM OUTLET STRUCTURE I:\001017\_Commercial\StonnwaterVDrainage\LCTS Comin_Drainage Rpt_Basin2_Det_Hydromod-S WMP.Doc Calculations for Detention Basin with Hydromodification stage (ft) Elevation (ft) Detention Basin Plan Area (sf) Average Area (cf) Storage (ac-ft) TOTAL STORAGE (ac ft) 5-inch pipe (Hydromod) (cfs) 12-inch pipe (Hydromod) (cfs) Weir (cfs) 30-inch pipe (cfs) Outlet Q (cfs) 0.0 266.0 0 0 0.000 0.000 0.0 0.0 0.0 0.0 0 1.0 267.0 5,387 2,694 0.062 0.062 0.6 0.0 0.0 0.0 0.6 1.6 267.6 8,892 4,284 0.098 0.160 0.8 0.0 0.0 0.0 0.8 2.0 268.0 11,229 4,024 0.092 0.253 0.9 1.2 0.0 0.0 2.1 2.5 268.5 12,121 5,838 0.134 0.387 1.0 1.7 0.0 0.0 2.7 3.0 269.0 13,013 6,284 0.144 0.531 1.1 2.6 0.0 32.3 3.7 3.5 269.5 13,544 6,639 0.152 0.683 1.2 3.2 21.2 36.6 25.7 4.0 270.0 14,074 6,904 0.159 0.842 1.3 3.7 See 30-inch Q 40.5 40.5 5.0 271.0 15,168 14,621 0.336 1.177 1.5 4.6 See 30-inch Q 47.3 47.3 6.0 272.0 16,300 15,734 0.361 1.539 1.6 5.4 See 30-inch Q 53.2 53.2 7.0 273.0 17,491 16,896 0.388 1.926 1.8 6.0 See 30-inch Q 58.5 58.5 Detention Basin Depth vs Storage vs Discharge from Outlet Structure Stage (ft) Storage (ac-ft) Outlet Q (cfs) 0.0 0.000 0.0 1.0 0.062 0.6 1.6 0.160 0.8 2.0 0.253 2.1 2.5 0.387 2.7 3.0 0.531 3.7 3.5 0.683 25.7 4.0 0.842 40.5 5.0 1.177 47.3 6.0 1.539 53.2 7.0 1.926 58.5 l:\001017\_Commercial\Stormwater\Drainage\Detention Basin with HydroMod\DET BASIN STORAGE W HYDROMOD CALCULATIONS FOR DETENTION BASIN WITH HYDROMODIFICATION I:\001017\_Commercial\Stormwater\Drainage\LCTS Comm_DrainageRpt_Basin2_Det_Hydromod-SWMP.DOC •I''>''l''l''k************i,*ic*i,**i,i,i,ir*****ic**********************i,i^ HYDRAULICS ELEMENTS - II PROGRAM PACKAGE STORAGE BASIN HYDROGRAPH ROUTING MODEL •l''l''l''*'l''*'k*********i,i,i!ic****i,***********************ic*****^ (c) Copyright 1983-2012 Advanced Engineering Software (aes) Ver. 19.0 Release Date: 06/01/2012 License ID 1423 Analysis prepared by: FILE NAME: 1290DB-2.DAT TIME/DATE OF STUDY: 16:45 06/30/2013 ENTERED INFORMATION: TOTAL NUMBER OF INFLOW HYDROGRAPH INTERVALS = 53 CONSTANT HYDROGRAPH TIME UNIT(MINUTES) = 7.000 ASSUMED INITIAL DEPTH(FEET) IN STORAGE BASIN = 1.00 ENTERED INFLOW HYDROGRAPH ORDINATES(CFS) * INTERVAL FLOW * INTERVAL FLOW * INTERVAL FLOW * * NUMBER (CFS * NUMBER (CFS * NUMBER (CFS) * * 1 : 0 . 00* 2 : 3 .80* 3 : 3 . 90* * 4 : 4 . 00* 5 : 4 . 00* 6 : 4 . 10* * 7 : 4 20* 8 : 4 30* 9 : 4 . 40* * 10 : 4 50* 11 4 60* 12 4 . 80* * 13 : 4 90* 14 5 10* 15 5 . 20* * 16 5 40* 17 5 50* 18 5 . 80* * 19 5 90* 20 6 20* 21 6 . 40* * 22 6 80* 23 7 00* 24 7 . 60* * 25 7 80* 26 8 50* 27 8 . 90* * 28 9 90* 29 10 50* 30 12 . 00* * 31 13 10* 32 16 00* 33 18 . 20* * 34 26 70* 35 33 . 30* 36 139. 15* * 37 21 40* 38 14 . 30* 39. 11. 20* * 40 9. 40* 41 8 . 20* 42 : 7. 30* * 43 . 6 . 60* 44 : 6 . 10* 45 : 5 . 60* * 46 : 5 . 30* 47 : 5 . 00* 48 : 4 . 70* * 49: 4 . 50* 50 : 4 . 30* 51: 4 . 10* * 52 : 3 . 90* 53 : 0. 00* DEPTH -VS.-STORAGE AND DEPTH-VS.-DISCHARGE INFORMATION: TOTAL NUMBER OF BASIN DEPTH INFORMATION ENTRIES = 11 *BASIN-DEPTH STORAGE OUTFLOW **BASIN-DEPTH STORAGE OUTFLOW * * (FEET) (ACRE-FEET) (CFS) ** (FEET) (ACRE-FEET) (CFS) * * 0 000 0 000 0 000** 1.100 0.062 0.600* * 1 600 0 160 0 800** 2 . 000 0 .253 2.100* * 2 500 0 387 2 700** 3 . 000 0.531 3.700* * 3 500 0 683 25 700** 4 . 000 0 . 842 40.500* * 5 000 1 177 47 300** 6 . 000 1.539 53 .200* * 7 000 1 926 58 500** * * * * * *********** *********** ************* ********************************** INITIAL BASIN DEPTH(FEET) = 1.00 INITIAL BASIN STORAGE(ACRE-FEET) = INITIAL BASIN OUTFLOW(CFS) = 0.55 0 . 06 BASIN STORAGE, OUTFLOW AND DEPTH ROUTING VALUES: INTERVAL NUMBER 1 2 3 4 5 9 10 11 {S-0*DT/2} (ACRE-FEET) 0.OOOOO 0.05911 0.15614 0.24288 0.37398 0.51316 0.55910 0.64675 0.94897 1.28253 1.64398 {S+0*DT/2} (ACRE-FEET) 0.OOOOO 0 . 06489 0 .16386 0.26312 0 .40002 0.54884 0. 80690 1. 03725 1.40503 1.79547 2.20802 WHERE S=STORAGE(AF);0=0UTFL0W(AF/MIN.);DT=UNIT(MIN.) *UNIT-HYDROGRAPH STORAGE-BASIN ROUTING* NOTE: COMPUTED BASIN DEPTH, OUTFLOW, AND STORAGE QUANTITIES OCCUR AT THE GIVEN TIME. BASIN INFLOW VALUES REPRESENT THE AVERAGE INFLOW DURING THE RECENT HYDROGRAPH UNIT INTERVAL. GRAPH NOTATION: "I"=MEAN UNIT INFLOW; "0"=OUTFLOW AT GIVEN TIME TIME INFLOW OUTFLOW (HOURS) (CFS) (CFS) 0.12 0.00 0.50 [BASIN DEPTH(FEET) = 0.23 3.80 0.64 [BASIN DEPTH(FEET) = 0.35 3.90 0.71 [BASIN DEPTH(FEET) = 0.47 4.00 0.77 [BASIN DEPTH(FEET) = 0.58 4.00 1.01 [BASIN DEPTH(FEET) = 0.70 4.10 1.40 STORAGE (ACRE-FT) 0. 0.051 O 0 . 91] 0.082 O 1.20] 0.114 0 1.36] 0.145 O 1.52] 0.175 O 1.66] 0.2 03 0 35 70 104 139 [BASIN DEPTH(FEET) = 1.78] 0.82 4.20 1.75 0.228 O [BASIN DEPTH(FEET) = 1.89] 0.93 4.30 2.08 0.251 O [BASIN DEPTH(FEET) = 1.9 9] 1.05 4.40 2.19 0.273 01 [BASIN DEPTH(FEET) = 2.08] 1-17 4.50 2.29 0.295 01 [BASIN DEPTH(FEET) = 2.16] 1-28 4.60 2.39 0.317 01 [BASIN DEPTH(FEET) = 2.24] 1-40 4.80 2.49 0.340 01 [BASIN DEPTH(FEET) = 2.32] 1-52 4.90 2.59 0.362 01 [BASIN DEPTH(FEET) = 2.41] 1-63 5.10 2.70 0.386 01 [BASIN DEPTH(FEET) = 2.5 0] 1-75 5.20 2.86 0.409 01 [BASIN DEPTH(FEET) = 2.58] 1-87 5.40 3.02 0.433 01 [BASIN DEPTH(FEET) = 2.66] 1-98 5.50 3.18 0.456 01 [BASIN DEPTH(FEET) = 2.74] 2.10 5.80 3.35 0.481 01 [BASIN DEPTH(FEET) = 2.83] 2.22 5.90 3.52 0.504 01 [BASIN DEPTH(FEET) = 2.91] 2.33 6.20 3.69 0.530 01 [BASIN DEPTH(FEET) = 2.99] 2.45 6.40 5.80 0.545 .0 [BASIN DEPTH(FEET) = 3.05] 2.57 6.80 6.62 0.551 .0 [BASIN DEPTH(FEET) = 3.07] 2.68 7.00 6.93 0.553 .0 [BASIN DEPTH(FEET) = 3.07] 2.80 7.60 7.48 0.557 .0 [BASIN DEPTH(FEET) = 3.09] 2.92 7.80 7.74 0.559 .0 [BASIN DEPTH(FEET) = 3.09] 3.03 8.50 8.37 0.563 .0 [BASIN DEPTH(FEET) = 3.11] 3.15 8.90 8.80 0.566 . 0 [BASIN DEPTH(FEET) = 3.12] 3.27 9.90 9.71 0.572 . O [BASIN DEPTH(FEET) = 3.14] 3.38 10.50 10.36 0.577 . 0 [BASIN DEPTH(FEET) = 3.15] 3.50 12.00 11.71 0.586 . 0 [BASIN DEPTH(FEET) = 3.18] 3.62 13.10 12.85 0.594 . 01 [BASIN DEPTH(FEET) = 3.21] 3.73 16.00 15.44 0.612 . O [BASIN DEPTH(FEET) = 3.27] 3.85 18.20 17.71 0.628 . 0 [BASIN DEPTH(FEET) = 3.97 26.70 25.10 [BASIN DEPTH(FEET) = 4.08 33.30 30.33 [BASIN DEPTH(FEET) = 4.20 139.15 54.90 [BASIN DEPTH(FEET) = 4.32 21.40 50.32 [BASIN DEPTH(FEET) = 4.43 14.30 44.58 [BASIN DEPTH(FEET) = 4.55 11.20 33.99 [BASIN DEPTH(FEET) = 4.67 9.40 16.49 [BASIN DEPTH(FEET) = 4.78 8.20 9.68 [BASIN DEPTH(FEET) = 4.90 7.30 7 .72 [BASIN DEPTH(FEET) = 5.02 6.60 6.80 [BASIN DEPTH(FEET) = 5.13 6.10 6.22 [BASIN DEPTH(FEET) = 5.25 5.60 5.71 [BASIN DEPTH(FEET) = 5.37 5.30 5.37 [BASIN DEPTH(FEET) = 5.48 5.00 5.07 [BASIN DEPTH(FEET) = 5.60 4.70 4.77 [BASIN DEPTH(FEET) = 5.72 4.50 4.55 [BASIN DEPTH(FEET) = 5.83 4.30 4.34 [BASIN DEPTH(FEET) = 5.95 4.10 4.14 [BASIN DEPTH(FEET) = 6.07 3.90 3.94 [BASIN DEPTH(FEET) = 6.18 0.00 3.46 [BASIN DEPTH(FEET) = 6.30 0.00 3.24 [BASIN DEPTH(FEET) = 6.42 0.00 3.03 [BASIN DEPTH(FEET) = 6.53 0.00 2.83 [BASIN DEPTH(FEET) = 6.65 0.00 2.67 [BASIN DEPTH(FEET) = 6.77 0.00 2.55 [BASIN DEPTH(FEET) = 6.88 0.00 2.45 [BASIN DEPTH(FEET) = 7.00 0.00 2.34 3 .32] 0.679 . 01 . 3.49] 0.733 . OI. 3 .66] 1.663 . . 0 6 .32] 1.363 .1.0 5.51] 1.043 .1 .0 4 .60] 0.772 . I O. 3 .78] 0.619 . 10 3.29] 0.572 .10 3 .14] 0.559 .0 3 . 09] 0.552 .0 3 . 07] 0.548 .0 3 . 06] 0.545 .0 3 .05] 0.543 .0 3 . 04] 0.540 .0 3 . 03] 0.538 .0 3 .02] 0.537 .0 3 . 02] 0.535 0 3 . 01] 0.534 O 3 .01] 0.533 O 3 . 01] 0.497 O 2 . 88] 0.465 O 2 .77] 0.434 0 2 .66] 0.406 O 2 .57] 0.380 O 2 .47] 0.354 0 2.38] 0.330 O 2.29] 0.307 0 [BASIN DEPTH(FEET) = 2.2 0] 7.12 0.00 2.24 0.285 0 [BASIN DEPTH(FEET) = 2.12] 7.23 0.00 2.15 0.264 O [BASIN DEPTH(FEET) = 2.04] 7.35 0.00 1.98 0.244 O [BASIN DEPTH(FEET) = 1.96] 7.47 0.00 1.73 0.226 0 [BASIN DEPTH(FEET) = 1.88] 7.58 0.00 1.51 0.211 O [BASIN DEPTH(FEET) = 1.82] 7.70 0.00 1.32 0.197 O [BASIN DEPTH(FEET) = 1.76] 7.82 0.00 1.15 0.185 O [BASIN DEPTH(FEET) = 1.71] 7.93 0.00 1.01 0.175 O [BASIN DEPTH(FEET) = 1.66] 8.05 0.00 0.88 0.166 0 [BASIN DEPTH(FEET) = 1.62] 8.17 0.00 0.80 0.158 O [BASIN DEPTH(FEET) = 1.5 9] 8.28 0.00 0.78 0.150 O [BASIN DEPTH(FEET) = 1.55] 8.40 0.00 0.76 0 .143 O [BASIN DEPTH(FEET) = 1.51] 8.52 0.00 0.75 0.135 O [BASIN DEPTH(FEET) = 1.4 7] 8.63 0.00 0.73 0.128 O [BASIN DEPTH(FEET) = 1.44] 8.75 0.00 0.72 0.121 O [BASIN DEPTH(FEET) = 1.4 0] 8.87 0.00 0.71 0.114 O [BASIN DEPTH(FEET) = 1.3 7] 8.98 0.00 0.69 0.107 0 [BASIN DEPTH(FEET) = 1.33] 9.10 0.00 0.68 0.101 0 [BASIN DEPTH(FEET) = 1.30] 9.22 0.00 0.67 0.094 O [BASIN DEPTH(FEET) = 1.27] 9.33 0.00 0.65 0.088 O [BASIN DEPTH(FEET) = 1.23] 9.45 0.00 0.64 0.082 O [BASIN DEPTH(FEET) = 1.20] 9.57 0.00 0.63 0.076 O [BASIN DEPTH(FEET) = 1.17] 9.68 0.00 0.62 0.070 O [BASIN DEPTH(FEET) = 1.14] 9.80 0.00 0.60 0.064 0 [BASIN DEPTH(FEET) = 1.11] 9.92 0.00 0.56 0.058 0 [BASIN DEPTH(FEET) = 1.03] 10.03 0.00 0.51 0.053 0 [BASIN DEPTH(FEET) = 0.94] 10.15 0.00 0.47 0.048 0 [BASIN DEPTH(FEET) = 0.86] 10.27 0.00 0.43 0.044 O [BASIN DEPTH(FEET) = 0.78] 10.38 0.00 0.39 0.040 O [BASIN DEPTH(FEET) = 0.71] 10.50 0.00 0.35 0.036 O [BASIN DEPTH(FEET) = 0.65] 10.62 0.00 0.32 0.033 O [BASIN DEPTH(FEET) = 0.59] 10.73 0.00 0.29 0.030 O [BASIN DEPTH(FEET) = 0.54] 10.85 0.00 0.27 0.028 O [BASIN DEPTH(FEET) = 0.4 9] 10.97 0.00 0.24 0.025 0 [BASIN DEPTH(FEET) = 0.45] 11.08 0.00 0.22 0.023 O [BASIN DEPTH(FEET) = 0.41] 11.20 0.00 0.20 0.021 O [BASIN DEPTH(FEET) = 0.3 7] 11.32 0.00 0.18 0.019 O [BASIN DEPTH(FEET) = 0.34] 11.43 0.00 0.17 0.017 0 [BASIN DEPTH(FEET) = 0.31] 11. 55 0.00 0 .15 0 . 016 0 [BASIN DEPTH(FEET) = 0.2 8] 11.67 0.00 0.14 0.014 O [BASIN DEPTH(FEET) = 0.25] 11.78 0.00 0.13 0.013 0 [BASIN DEPTH(FEET) = 0.23] 11.90 0.00 0.12 0.012 0 [BASIN DEPTH(FEET) = 0.21] 12 .02 0.00 0.10 0.Oil 0 [BASIN DEPTH(FEET) = 0.19] 12.13 0.00 0.10 0.010 O [BASIN DEPTH(FEET) = 0.17] 12.25 0.00 0.09 0.009 O [BASIN DEPTH(FEET) = 0.16] 12.37 0.00 0.08 0.008 O [BASIN DEPTH(FEET) = 0.15] 12.48 0.00 0.07 0.007 O [BASIN DEPTH(FEET) = 0.13] 12 .60 0.00 0.07 0.007 O [BASIN DEPTH(FEET) = 0.12] 12 .72 0.00 0.06 0.006 O [BASIN DEPTH(FEET) = 0.11] 12 . 83 0 . 00 0 . 05 0 . 006 0 [BASIN DEPTH(FEET) = 0.10] 12.95 0.00 0.05 0.005 O [BASIN DEPTH(FEET) = 0.09] 13 . 07 0 . 00 0 . 05 0 . 005 0 [BASIN DEPTH(FEET) = 0.08] 13.18 0.00 0.04 0.004 0 [BASIN DEPTH(FEET) = 0.08] 13.30 0.00 0.04 0.004 0 [BASIN DEPTH(FEET) = 0.07] 13.42 0.00 0.03 0.004 O [BASIN DEPTH(FEET) = 0.06] 13.53 0.00 0.03 0.003 O [BASIN DEPTH(FEET) = 0.06] 13 . 65 0.00 0 . 03 0 . 003 O [BASIN DEPTH(FEET) = 0.05] 13.77 0.00 0 . 03 0 . 003 0 [BASIN DEPTH(FEET) = 0.05] 13.88 0.00 0.02 0.002 0 [BASIN DEPTH(FEET) = 0.04] 14.00 0.00 0.02 0. 002 O [BASIN DEPTH(FEET) = 0.04] 14.12 0.00 0.02 0.002 O [BASIN DEPTH(FEET) = 0.04] 14 .23 0.00 0.02 0.002 O [BASIN DEPTH(FEET) = 0.03] 14 . 35 0.00 0.02 0.002 0 [BASIN DEPTH(FEET) = 0.03] 14 .47 0.00 0.01 0 . 002 0 [BASIN DEPTH(FEET) = 0.03] 14.58 0.00 0.01 0.001 O [BASIN DEPTH(FEET) = 0.02] 14.70 0.00 0.01 0.001 0 [BASIN DEPTH(FEET) = 0.02] 14 .82 0.00 0.01 0.001 0 [BASIN DEPTH(FEET) = 0.02] 14.93 0.00 0.01 0.001 O [BASIN DEPTH(FEET) = 0.02] 15.05 0.00 0.01 0.001 0 [BASIN DEPTH(FEET) = 0.02] 15.17 0.00 0.01 0.001 O [BASIN DEPTH(FEET) = 0.02] 15.28 0.00 0.01 0.001 0 [BASIN DEPTH(FEET) = 0.01] 15 .40 0.00 0.01 0.001 0 [BASIN DEPTH(FEET) = 0.01] 15.52 0.00 0.01 0.001 O [BASIN DEPTH(FEET) = 0.01] 15.63 0.00 0.01 0.001 O [BASIN DEPTH(FEET) = 0.01] 15.75 0.00 0.01 0.001 O [BASIN DEPTH(FEET) = 0.01] 15.87 0.00 0.00 0.000 O [BASIN DEPTH(FEET) = 0.01] 15.98 0.00 0.00 0.000 O [BASIN DEPTH(FEET) = 0.01] 16.10 0.00 0.00 0. 000 0 [BASIN DEPTH(FEET) = 0.01] 16.22 0.00 0.00 0.000 0 [BASIN DEPTH(FEET) = 0.01] 16.33 0.00 0.00 0.000 0 [BASIN DEPTH(FEET) = 0.01] 16.45 0.00 0.00 0.000 0 [BASIN DEPTH(FEET) = 0.01] 16.57 0.00 0.00 0.000 O [BASIN DEPTH(FEET) = 0.01] 16.68 0.00 0.00 0.000 O [BASIN DEPTH(FEET) = 0.00] 16 . 80 0 . 00 0 . 00 0 . 000 O [BASIN DEPTH(FEET) = 0.00] 16.92 0.00 0.00 0.000 0 [BASIN DEPTH(FEET) = 0.00] 17.03 0.00 0.00 0.000 O [BASIN DEPTH(FEET) = 0.00] 17.15 0.00 0.00 0.000 O [BASIN DEPTH(FEET) = 0.00] 17.27 0.00 0.00 0.000 0 [BASIN DEPTH(FEET) = 0.00] 17.38 0.00 0.00 0.000 O [BASIN DEPTH(FEET) = 0.00] 17.50 0.00 0.00 0.000 O [BASIN DEPTH(FEET) = 0.00] 17.62 0.00 0.00 0.000 O [BASIN DEPTH(FEET) = 0.0 0] 17.73 0.00 0.00 0 . 000 O [BASIN DEPTH(FEET) = 0.00] 17.85 0.00 0.00 0.000 O [BASIN DEPTH(FEET) = 0.00] 17. 97 0.00 0.00 0. 000 O [BASIN DEPTH(FEET) = 0.0 0] 18.08 0.00 0.00 0.000 O [BASIN DEPTH(FEET) = 0.00] 18.20 0.00 0.00 0.000 O [BASIN DEPTH(FEET) = 0.00] 18.32 0.00 0.00 0.000 O [BASIN DEPTH(FEET) = 0.00] 18.43 0.00 0.00 0.000 O [BASIN DEPTH(FEET) = 0.00] 18.55 0.00 0.00 0.000 O [BASIN DEPTH(FEET) = 0.00] 18.67 0.00 0.00 0.000 0 [BASIN DEPTH(FEET) = 0.00] SECTION 4 I:\001017\_Commercial\Stormwater\Drainage\LCTS Comm_Drainage Rpt_Basin2_Det_Hydromod-SWMP.Doc