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HomeMy WebLinkAboutCT 2022-0001; HOPE APARTMENTS; PRIORITY DEVELOPMENT PROJECT (PDP) FINAL STORM WATER QUALITY MANAGEMENT PLAN (SWQMP); 2024-07-01 CITY OF CARLSBAD PRIORITY DEVELOPMENT PROJECT (PDP) FINAL STORM WATER QUALITY MANAGEMENT PLAN (SWQMP) FOR HOPE APARTMENTS 945 & 955 GRAND AVENUE 2944 HOPE AVENUE 1006 CARLBAD VILLAGE DRIVE CT 2022-0001 / SDP 2022-0006 GR2023-0044 / DWG 546-4A ROW2023-0851 / DWG 546-4 ENGINEER OF WORK: _____________________________________________ TYLER G LAWSON, PE #80356 PREPARED FOR: CARLSBAD VILLAGE II, LLC 5120 SHOREHAM PLACE #150 SAN DIEGO, CA 92122 PH: (858)-623-4962 PREPARED BY: PASCO, LARET, SUITER & ASSOCIATES 535 N. HWY 101, SUITE A SOLANA BEACH, CA 92075 PH: (858) 259-8212 DATE: July 2024 TABLE OF CONTENTS Certification Page Project Vicinity Map FORM E-34 Storm Water Standard Questionnaire Site Information FORM E-36 Standard Project Requirement Checklist Summary of PDP Structural BMPs Attachment 1: Backup for PDP Pollutant Control BMPs Attachment 1a: DMA Exhibit Attachment 1b: Tabular Summary of DMAs and Design Capture Volume Calculations Attachment 1c: Harvest and Use Feasibility Screening (when applicable) Attachment 1d: Categorization of Infiltration Feasibility Condition (when applicable) Attachment 1e: Pollutant Control BMP Design Worksheets / Calculations Attachment 2: Backup for PDP Hydromodification Control Measures Attachment 2a: Hydromodification Management Exhibit Attachment 2b: Management of Critical Coarse Sediment Yield Areas Attachment 2c: Geomorphic Assessment of Receiving Channels (Not Included) Attachment 2d: Flow Control Facility Design Attachment 3: Structural BMP Maintenance Thresholds and Actions Attachment 4: Single Sheet BMP (SSBMP) Exhibit Page 1 of 4 REV 04/23 E-34 To address post-development pollutants that may be generated from development projects, the city requires that new development and significant redevelopment priority projects incorporate Permanent Storm Water Best Management Practices (BMPs) into the project design per Carlsbad BMP Design Manual (BMP Manual). To view the BMP Manual, refer to the Engineering Standards (Volume 5). This questionnaire must be completed by the applicant in advance of submitting for a development application (subdivision, discretionary permits and/or construction permits). The results of the questionnaire determine the level of storm water standards that must be applied to a proposed development or redevelopment project. Depending on the outcome, your project will either be subject to ‘STANDARD PROJECT’ requirements, “PRIORITY DEVELOPMENT PROJECT (PDP) requirements or not considered a development project. This questionnaire will also determine if the project is subject to TRASH CAPTURE REQUIREMENTS. Your responses to the questionnaire represent an initial assessment of the proposed project conditions and impacts. City staff has responsibility for making the final assessment after submission of the development application. If staff determines that the questionnaire was incorrectly filled out and is subject to more stringent storm water standards than initially assessed by you, this will result in the return of the development application as incomplete. In this case, please make the changes to the questionnaire and resubmit to the city. If you are unsure about the meaning of a question or need help in determining how to respond to one or more of the questions, please seek assistance from Land Development Engineering staff. A completed and signed questionnaire must be submitted with each development project application. Only one completed and signed questionnaire is required when multiple development applications for the same project are submitted concurrently. PROJECT INFORMATION PROJECT NAME: APN: ADDRESS: The project is (check one): New Development Redevelopment The total proposed disturbed area is: ft2 ( ) acres The total proposed newly created and/or replaced impervious area is: ft2 ( ) acres If your project is covered by an approved SWQMP as part of a larger development project, provide the project ID and the SWQMP # of the larger development project: Project ID SWQMP #: Then, go to Step 1 and follow the instructions. When completed, sign the form at the end and submit this with your application to the city. This Box for City Use Only City Concurrence: YES NO Date: Project ID: By: Development Services Land Development Engineering 1635 Faraday Avenue 442-339-2750www.carlsbadca.gov STORM WATER STANDARDS QUESTIONNAIRE E-34 INSTRUCTIONS: E-34 Page 2 of 4 REV 04/23 STEP 1 TO BE COMPLETED FOR ALL PROJECTS To determine if your project is a “development project”, please answer the following question: YES NO Is your project LIMITED TO routine maintenance activity and/or repair/improvements to an existing building or structure that do not alter the size (See Section 1.3 of the BMP Design Manual for guidance)? If you answered “yes” to the above question, provide justification below then go to Step 6, mark the box stating “my project is not a ‘development project’ and not subject to the requirements of the BMP manual” and complete applicant information. Justification/discussion: (e.g. the project includes only interior remodels within an existing building): If you answered “no” to the above question, the project is a ‘development project’, go to Step 2. STEP 2 TO BE COMPLETED FOR ALL DEVELOPMENT PROJECTS To determine if your project is exempt from PDP requirements pursuant to MS4 Permit Provision E.3.b.(3), please answer the following questions: Is your project LIMITED to one or more of the following: YES NO 1.Constructing new or retrofitting paved sidewalks, bicycle lanes or trails that meet the following criteria:a)Designed and constructed to direct storm water runoff to adjacent vegetated areas, or other non- erodible permeable areas; ORb)Designed and constructed to be hydraulically disconnected from paved streets or roads; OR c)Designed and constructed with permeable pavements or surfaces in accordance with USEPAGreen Streets guidance? 2. Retrofitting or redeveloping existing paved alleys, streets, or roads that are designed and constructed inaccordance with the USEPA Green Streets guidance? 3.Ground Mounted Solar Array that meets the criteria provided in section 1.4.2 of the BMP manual? If you answered “yes” to one or more of the above questions, provide discussion/justification below, then go to Step 6, mark the second box stating “my project is EXEMPT from PDP …” and complete applicant information. Discussion to justify exemption (e.g. the project redeveloping existing road designed and constructed in accordance with the USEPA Green Street guidance): If you answered “no” to the above questions, your project is not exempt from PDP, go to Step 3. E-34 Page 3 of 4 REV 04/23 * Environmentally Sensitive Areas include but are not limited to all Clean Water Act Section 303(d) impaired water bodies; areas designated as Areas of SpecialBiological Significance by the State Water Resources Control Board (Water Quality Control Plan for the San Diego Basin (1994) and amendments); water bodiesdesignated with the RARE beneficial use by the State Water Resources Control Board (Water Quality Control Plan for the San Diego Basin (1994) and amendments); areas designated as preserves or their equivalent under the Multi Species Conservation Program within the Cities and County of San Diego; Habitat ManagementPlan; and any other equivalent environmentally sensitive areas which have been identified by the City. STEP 3 TO BE COMPLETED FOR ALL NEW OR REDEVELOPMENT PROJECTS To determine if your project is a PDP, please answer the following questions (MS4 Permit Provision E.3.b.(1)): YES NO 1. Is your project a new development that creates 10,000 square feet or more of impervious surfacescollectively over the entire project site? This includes commercial, industrial, residential, mixed-use,and public development projects on public or private land. 2. Is your project a redevelopment project creating and/or replacing 5,000 square feet or more of impervious surface collectively over the entire project site on an existing site of 10,000 square feet or more ofimpervious surface? This includes commercial, industrial, residential, mixed-use, and public development projects on public or private land. 3. Is your project a new or redevelopment project that creates and/or replaces 5,000 square feet or more ofimpervious surface collectively over the entire project site and supports a restaurant? A restaurant is a facility that sells prepared foods and drinks for consumption, including stationary lunch counters and refreshment stands selling prepared foods and drinks for immediate consumption (Standard Industrial Classification (SIC) code 5812). 4. Is your project a new or redevelopment project that creates 5,000 square feet or more of impervious surface collectively over the entire project site and supports a hillside development project? A hillsidedevelopment project includes development on any natural slope that is twenty-five percent or greater. 5. Is your project a new or redevelopment project that creates and/or replaces 5,000 square feet or more ofimpervious surface collectively over the entire project site and supports a parking lot? A parking lot is a land area or facility for the temporary parking or storage of motor vehicles used personally for business or for commerce. 6. Is your project a new or redevelopment project that creates and/or replaces 5,000 square feet or moreof impervious street, road, highway, freeway or driveway surface collectively over the entire projectsite? A street, road, highway, freeway or driveway is any paved impervious surface used for the transportation of automobiles, trucks, motorcycles, and other vehicles. 7. Is your project a new or redevelopment project that creates and/or replaces 2,500 square feet or more ofimpervious surface collectively over the entire site, and discharges directly to an EnvironmentallySensitive Area (ESA)? “Discharging Directly to” includes flow that is conveyed overland a distance of 200 feet or less from the project to the ESA, or conveyed in a pipe or open channel any distance as an isolated flow from the project to the ESA (i.e. not commingled with flows from adjacent lands).* 8.Is your project a new development or redevelopment project that creates and/or replaces 5,000 squarefeet or more of impervious surface that supports an automotive repair shop? An automotive repair shop is a facility that is categorized in any one of the following Standard Industrial Classification (SIC)codes: 5013, 5014, 5541, 7532-7534, or 7536-7539. 9. Is your project a new development or redevelopment project that creates and/or replaces 5,000 squarefeet or more of impervious area that supports a retail gasoline outlet (RGO)? This category includesRGO’s that meet the following criteria: (a) 5,000 square feet or more or (b) a project Average Daily Traffic (ADT) of 100 or more vehicles per day. 10. Is your project a new or redevelopment project that results in the disturbance of one or more acres of landand are expected to generate pollutants post construction? 11. Is your project located within 200 feet of the Pacific Ocean and (1) creates 2,500 square feet or more of impervious surface or (2) increases impervious surface on the property by more than 10%? (CMC21.203.040) If you answered “yes” to one or more of the above questions, your project is a PDP. If your project is a redevelopment project, go to step 4. If your project is a new project, go to step 5, complete the trash capture question. If you answered “no” to all of the above questions, your project is a ‘STANDARD PROJECT’. Go to step 5, complete the trash capture question. SITE INFORMATION CHECKLIST Project Summary Information Project Name HOPE APARTMENTS Project ID (CT 2022-0001) Project Address 945 & 955 Hope Avenue, 2944 Hope Avenue, 1006 Carlsbad Village, Carlsbad, CA 92008 Assessor's Parcel Number(s) (APN(s)) 230-320-20, 230-320-02, 230-320-41, 230-320- 48 Project Watershed (Hydrologic Unit) Carlsbad 904.21 (Buena Vista Creek) Parcel Area 2.93 Acres (127,724 Square Feet) Existing Impervious Area (subset of Parcel Area) 1.151 Acres (50,139 Square Feet) Area to be disturbed by the project (Project Area Onsite) (Project Area w/ ROW) 1.865 Acres (81,237 Square Feet) 2.014 Acres (87,710 Square Feet) Project Proposed Impervious Area (subset of Project Area) 1.646 Acres (71,716 Square Feet) 1.541 Acres (67,116 Square Feet) Onsite 0.106 Acres (4,600 Square Feet) ROW Project Proposed Pervious Area (subset of Project Area) 0.367 Acres (15,994 Square Feet) Note: Proposed Impervious Area + Proposed Pervious Area = Area to be Disturbed by the Project. This may be less than the Parcel Area. Description of Existing Site Condition and Drainage Patterns Current Status of the Site (select all that apply): Existing Development Previously graded but not built out Agricultural or other non-impervious use Vacant, undeveloped/natural Description / Additional Information: Existing Land Cover Includes (select all that apply): Vegetative Cover Non-Vegetated Pervious Areas Impervious Areas Description / Additional Information: Underlying Soil belongs to Hydrologic Soil Group (select all that apply): NRCS Type A NRCS Type B NCRS Type C NRCS Type D Approximate Depth to Groundwater (GW): GW Depth < 5 feet 5 feet < GW Depth < 10 feet 10 feet < GW Depth < 20 feet GW Depth > 20 feet Existing Natural Hydrologic Features (select all that apply): Watercourses Seeps Springs Wetlands None Description / Additional Information: Description of Existing Site Topography and Drainage [How is storm water runoff conveyed from the site? At a minimum, this description should answer (1) whether existing drainage conveyance is natural or urban; (2) describe existing constructed storm water conveyance systems, if applicable; and (3) is runoff from offsite conveyed through the site? if so, describe]: (1) Existing drainage conveyance can be categorized as urban. There is not any significant drainage infrastructure onsite to convey storm water, and water travels through the site on the surface by means of sheet flow. Water eventually leaves the site in two locations. The majority of the site drains towards the northern property line and toward the intersection of Grand and Hope Avenue before entering the public storm drain system. The remaining portion of the site drains to the eastern property line. Runoff draining to the east enter curb inlets within the private drive between Grand Avenue and Carlsbad Village Drive. From there runoff is treated then routed south through a buried network to the public storm drain under Carlsbad Village Drive. (2) There is an existing storm water conveyance system located within the private drive between Grand Avenue and Carlsbad village. As runoff drains to the east runoff enters curb cuts to be treated by either modular wetland systems located in the sourthern and mid sections of the private drive or by a biofiltration basin at the south end of the private drive by Carlsbad Village Drive. After being treated water is then routed through a private buried storm drain system to the public storm drain system under Carlsbad Village Drive. (3) No, there does not appear to be any runoff from offsite entering the project site. Does the project include changes to site drainage (e.g., installation of new storm water conveyance systems)? Yes No Description / Additional Information: Although the project proposes onsite grading, the drainage patterns after precise grading mimic pre-development patterns. The majority of the site will continue to drain to the northern property line, and discharge on Grand Avenue near the intersection with Hope Avenue, after being treated in a biofiltration raised planter BMPs. A portion of runoff will continue to drain towards the east before entering existing pollutant control BMPs or a proposed tree well within the private drive. The remainder of runoff will be treated with tree well BMPs along Grand Ave treating an area equivalent to the area that cannot be feasibly routed to the tree wells on Grand Ave. Identify whether any of the following features, activities, and/or pollutant source areas will be present (select all that apply): On-site storm drain inlets Interior floor drains and elevator shaft sump pumps Interior parking garages Need for future indoor & structural pest control Landscape/Outdoor Pesticide Use Pools, spas, ponds, decorative fountains, and other water features Food service Refuse areas Industrial processes Outdoor storage of equipment or materials Vehicle and Equipment Cleaning Vehicle/Equipment Repair and Maintenance Fuel Dispensing Areas Loading Docks Fire Sprinkler Test Water Miscellaneous Drain or Wash Water Plazas, sidewalks, and parking lots Identification of Receiving Water Pollutants of Concern Describe path of storm water from the project site to the Pacific Ocean (or bay, lagoon, lake or reservoir, as applicable): Drainage leaving the site eventually makes its way to Buena Vista Lagoon through the buried public storm drain conveyance system. Runoff continues in Buena Vista Lagoon before entering the Pacific Ocean. List any 303(d) impaired water bodies within the path of storm water from the project site to the Pacific Ocean (or bay, lagoon, lake or reservoir, as applicable), identify the pollutant(s)/stressor(s) causing impairment, and identify any TMDLs for the impaired water bodies: 303(d) Impaired Water Body Pollutant(s)/Stressor(s) TMDLs Buena Vista Lagoon Indicator Bacteria Nutrients Sedimentation / Siltation Toxicity Identification of Project Site Pollutants Identify pollutants anticipated from the project site based on all proposed use(s) of the site (see BMP Design Manual Appendix B.6): Pollutant Not Applicable to the Project Site Anticipated from the Project Site Also a Receiving Water Pollutant of Concern Sediment X Nutrients X Heavy Metals Organic Compounds Trash & Debris X Oxygen Demanding Substances X Oil & Grease X Bacteria & Viruses X Pesticides X Hydromodification Management Requirements Do hydromodification management requirements apply (see Section 1.6 of the BMP Design Manual)? Yes, hydromodification management flow control structural BMPs required. No, the project will discharge runoff directly to existing underground storm drains discharging directly to water storage reservoirs, lakes, enclosed embayments, or the Pacific Ocean. No, the project will discharge runoff directly to conveyance channels whose bed and bank are concrete-lined all the way from the point of discharge to water storage reservoirs, lakes, enclosed embayments, or the Pacific Ocean. No, the project will discharge runoff directly to an area identified as appropriate for an exemption by the WMAA for the watershed in which the project resides. Description / Additional Information (to be provided if a 'No' answer has been selected above): Per “Hydromodification Exemption analyses for the select Carlsbad Watersheds” dated June 10, 2013 by Chang Consultants our project site is considered HMP exempt. Critical Coarse Sediment Yield Areas* *This Section only required if hydromodification management requirements apply Based on the maps provided within the WMAA, do potential critical coarse sediment yield areas exist within the project drainage boundaries? Yes No, No critical coarse sediment yield areas to be protected based on WMAA maps If yes, have any of the optional analyses presented in Section 6.2 of the BMP Design Manual been performed? 6.2.1 Verification of Geomorphic Landscape Units (GLUs) Onsite 6.2.2 Downstream Systems Sensitivity to Coarse Sediment 6.2.3 Optional Additional Analysis of Potential Critical Coarse Sediment Yield Areas Onsite No optional analyses performed, the project will avoid critical coarse sediment yield areas identified based on WMAA maps If optional analyses were performed, what is the final result? No critical coarse sediment yield areas to be protected based on verification of GLUs onsite Critical coarse sediment yield areas exist but additional analysis has determined that protection is not required. Documentation attached in Attachment 8 of the SWQMP. Critical coarse sediment yield areas exist and require protection. The project will implement management measures described in Sections 6.2.4 and 6.2.5 as applicable, and the areas are identified on the SWQMP Exhibit. Discussion / Additional Information: Flow Control for Post-Project Runoff* *This Section only required if hydromodification management requirements apply List and describe point(s) of compliance (POCs) for flow control for hydromodification management (see Section 6.3.1). For each POC, provide a POC identification name or number correlating to the project's HMP Exhibit and a receiving channel identification name or number correlating to the project's HMP Exhibit. Has a geomorphic assessment been performed for the receiving channel(s)? No, the low flow threshold is 0.1Q2 (default low flow threshold) Yes, the result is the low flow threshold is 0.1Q2 Yes, the result is the low flow threshold is 0.3Q2 Yes, the result is the low flow threshold is 0.5Q2 If a geomorphic assessment has been performed, provide title, date, and preparer: N/A Discussion / Additional Information: (optional) Other Site Requirements and Constraints When applicable, list other site requirements or constraints that will influence storm water management design, such as zoning requirements including setbacks and open space, or City codes governing minimum street width, sidewalk construction, allowable pavement types, and drainage requirements. Optional Additional Information or Continuation of Previous Sections As Needed This space provided for additional information or continuation of information from previous sections as needed. Describe the general strategy for structural BMP implementation at the site. This information must describe how the steps for selecting and designing storm water pollutant control BMPs presented in Section 5.1 of the BMP Design Manual were followed, and the results (type of BMPs selected). For projects requiring hydromodification flow control BMPs, indicate whether pollutant control and flow control BMPs are integrated together or separate. After development of the project site plan (including size of proposed structures) in accordance with City of Carlsbad General Plan and local zoning ordinance, the structural BMPs deemed most feasible for the site were biofiltration raised planters and a tree well. The project will also utilize the existing BMPs within the private drive between Grand Avenue and Carlsbad Village Drive. The existing area within this projects portion of the shared private drive currently draining to the existing Modular Wetland BMPs as shown in MS 16-06 (DWG 515-5A) is approximately 9,193 SF impervious and 245 SF pervious. The proposed impervious area draining to the existing BMPs is 5,291 SF resulting in a reduction of 3,902 SF of impervious area draining to the existing BMPs. The existing northerly and southerly Modular Wetland BMP currently receive 5,077 SF and 4,116 SF of impervious area respectively. The project proposes to drain 3,538 SF of impervious area to the northerly existing Modular Wetland BMP and 1,7353 SF of impervious area to the existing southerly Modular Wetland BMP. The project proposes twelve biofiltration raised planters to be located onsite. Runoff that lands on the roof will be routed to a raised planter BMP through a pipe system. Runoff from DMA 13 will not land on the roof and will sheet flow to the proposed tree well. The majority of runoff generated from DMA 13 will be treated by BMP 13. BMP 13 is a 10-ft diameter tree canopy that cannot full treat DMA 13. The portion of DMA 13 that is not treated by BMP 13 will be accounted for with an equivalent area swap and will be treated by BMP 14. Runoff from the disturbed area within Grand Avenue will also be treated by a tree well. Runoff from DMA 14 will treat the improvements along Grand Ave with a tree well. A portion of runoff from DMA 14 (DMA 14-1) cannot be feasibly routed to the tree well. Similarly, runoff generated from DMA 15 cannot be feasibly routed to a BMP. Runoff from DMA 14 and 15 not reaching a tree well will use equivalent area swaps in accordance with section 3.5 of the City of Carlsbad BMP design manual. BMP 14 will treat existing impervious areas from Grand Ave (DMA EQ-1) equivalent to the DCV that is not treated within DMAs 13, 14 and 15. The project is HMP exempt and the BMPs will be used for treatment control only. Structural BMP Summary Information [Copy this page as needed to provide information for each individual proposed structural BMP] Structural BMP ID No. DWG ____ Sheet No. ___ Type of structural BMP: Retention by harvest and use (HU-1) Retention by infiltration basin (INF-1) Retention by bioretention (INF-2) Retention by permeable pavement (INF-3) Partial retention by biofiltration with partial retention (PR-1) Biofiltration (BF-1) Flow-thru treatment control included as pre-treatment/forebay for an onsite retention or biofiltration BMP (provide BMP type/description and indicate which onsite retention or biofiltration BMP it serves in discussion section below) Detention pond or vault for hydromodification management Other (describe in discussion section below) Purpose: Pollutant control only Hydromodification control only Combine pollutant control and hydromodification control Pre-treatment/forebay for another structural BMP Other (describe in discussion section below) Discussion (as needed): SF biofiltration basin located within the pool/courtyard area with a finished grade elevation of 50.5. Refer to project DMA Exhibit for size of drainage area tributary to basin and cross-section of BMP. Emergency overflow structure included in BMP for higher intensity storm events to convey water offsite also provided. Structural BMP Summary Information [Copy this page as needed to provide information for each individual proposed structural BMP] Structural BMP ID No. DWG ____ Sheet No. ___ Type of structural BMP: Retention by harvest and use (HU-1) Retention by infiltration basin (INF-1) Retention by bioretention (INF-2) Retention by permeable pavement (INF-3) Partial retention by biofiltration with partial retention (PR-1) Biofiltration (BF-1) Flow-thru treatment control included as pre-treatment/forebay for an onsite retention or biofiltration BMP (provide BMP type/description and indicate which onsite retention or biofiltration BMP it serves in discussion section below) Detention pond or vault for hydromodification management Other (describe in discussion section below) Purpose: Pollutant control only Hydromodification control only Combine pollutant control and hydromodification control Pre-treatment/forebay for another structural BMP Other (describe in discussion section below) Discussion (as needed): SF biofiltration basin located within the pool/courtyard area with a finished grade elevation of 50.5. Refer to project DMA Exhibit for size of drainage area tributary to basin and cross-section of BMP. Emergency overflow structure included in BMP for higher intensity storm events to convey water offsite also provided. ATTACHMENT 1 BACKUP FOR PDP POLLUTANT CONTROL BMPS This is the cover sheet for Attachment 1. Check which Items are Included behind this cover sheet: Attachment Sequence Contents Checklist Attachment 1a DMA Exhibit (Required) See DMA Exhibit Checklist on the back of this Attachment cover sheet. (24”x36” Exhibit typically required) Included Attachment 1b Tabular Summary of DMAs Showing DMA ID matching DMA Exhibit, DMA Area, and DMA Type (Required)* *Provide table in this Attachment OR on DMA Exhibit in Attachment 1a Included on DMA Exhibit in Attachment 1a Included as Attachment 1b, separate from DMA Exhibit Attachment 1c Form K-7, Harvest and Use Feasibility Screening Checklist (Required unless the entire project will use infiltration BMPs) Refer to Appendix B of the BMP Design Manual to complete Form K-7. Included Not included because the entire project will use infiltration BMPs Attachment 1d Infiltration Feasibility Analysis (Required unless the project will use harvest and use BMPs) Refer to Appendix D of the BMP Design Manual. Included Not included because the entire project will use harvest and use BMPs Attachment 1e Pollutant Control BMP Design Worksheets / Calculations (Required) Refer to Appendices B, E, and I of the BMP Design Manual for structural pollutant control and significant site design BMP design guidelines Included Attachment 1f Trash Capture BMP Design Calculations Refer to Appendices J of the BMP Design Manual for Trash capture BMP design guidelines Included Not included because the entire project is not subject to trash capture requirements Use this checklist to ensure the required information has been included on the DMA Exhibit: The DMA Exhibit must identify: √ Underlying hydrologic soil group √ Approximate depth to groundwater (N/A) Existing natural hydrologic features (watercourses, seeps, springs, wetlands) (N/A) Critical coarse sediment yield areas to be protected (if present) √ Existing topography and impervious areas √ Existing and proposed site drainage network and connections to drainage offsite √ Proposed grading √ Proposed impervious features √ Proposed design features and surface treatments used to minimize imperviousness √ Drainage management area (DMA) boundaries, DMA ID numbers, and DMA areas (square footage or acreage), and DMA type (i.e., drains to BMP, self-retaining, or self-mitigating) √ Structural BMPs (identify location and type of BMP) 9"TP9"TP 9"TP9"TP 7"TD4"TD 8"TD(4) 8"TD (4) 10"TD 12"TD 14 " T D 1 0 " T D 1 0 " T D 6"TD 6"TD 16"TC 42"TC 16"TC 15"TC 12"TC 16"TP 16"TP 16"TP 16"TP 11"TD 11"TD 12"TD 11"TD 11"TD 12"TD 11"TP 11"TP X X X X X X X XXXX X X X X X X X X X X X X X X X X OEOEOEOEOEOEOEOEOEOEOEOE OE OEOE OE OE OE OE OE OE OE OE OE OE OE OEOE OE OE OE OE OE OE OE OE OE OE OE OE OE OE OE OE OE OE OE OE OE OE OE OE OE OEOEOEOEOE OEOEOEOEOEOEOE OE OEOE OEOEOE OE OE OEOEOEOEOEOEOEOEOEOEOEOE O E OE OE OE OE OE OE E G GG G D D D D D D D D D SSS S SS EEE E E E E C C E WW W WW WW R A M P WOOD WALL 71 70 70 69 69 69 69 6 9 69 69 69 68 68 68 68 68 68 68 68 68 67 67 67 67 6 6 66 66 65 65 65 65 65 65 65 6 5 65 65 65 65 64 64 64 64 64 64 6 4 6 4 64 63 63 63 63 6 3 63 63 63 63 63 63 63 63 62 62 62 CONC PAD MON. WELL GEO GRIDTRANS PAD MON. WELL 67.10 TC 66.65 FL 67.84 TC 67.30 FL 67.73 TC 67.24 FL 68.49 TC 68.06 FL 68.59 TC 68.09 FL 68.61 TC 68.22 FL 69.33 TC 68.87 FL 68.98 TC 68.47 FL 68.79 TC 68.35 FL 68.97 TC 68.58 FL 69.12 TC 68.70 FL 68.47 TC 68.10 FL 69.16 TC 68.81 FL 69.52 TC 69.16 FL 69.08 TC 68.56 FL 69.50 TC 69.23 FL 69.58 TC 69.50 FL 68.30 TC 68.27 FL 68.64 TC 68.19 FL 68.44 TC 68.03 FL 68.17 TC 67.74 FL 68.09 TC 67.70 FL 68.67 TC 68.67 FL 68.48 TC 68.43 FL 68.98 TC 68.48 FL 69.22 TC 68.78 FL 68.09 TC 67.65 FL 69.30 TC 68.84 FL 68.52 TC 68.04 FL 68.96 TC 68.59 FL 69.30 TC 68.80 FL 69.12 TC 68.70 FL 68.94 TC 68.54 FL 68.58 TC 68.16 FL 68.34 TC 67.95 FL 68.36 TC 67.93 FL 68.70 TC 68.28 FL 68.53 TC 68.08 FL 68.76 TC 68.76 FL 68.75 TC 68.31 FL67.95 TC 67.90 FL 67.41 TC 67.31 FL 65.86 TC 65.80 FL 65.20 TC 64.71 FL63.18 TC 62.73 FL 62.80 TC 62.31 FL 63.07 TC 63.04 FL 63.29 TC 63.25 FL 67.58 TC 67.08 FL 67.88 TC 67.44 FL 67.43 67.68 67.77 67.89 68.00 68.41 68.79 68.32 67.90 67.66 68.54 68.6 9 68.21 68.63 69.38 69.43 69.55 69.44 69.51 69.39 69.42 69.4969.4669.45 69.41 69.37 69.39 69.38 69.42 69.26 69.29 69.17 69.10 68.76 67.49 67.89 TC 67.51 FL 68.74 TC 68.24 FL 68.22 68.18 67.96 TC 67.56 FL 68.45 TC 68.00 FL 69.45 61.72 62.05 62.06 62.67 63.46 64.75 65.46 66.60 67.77 69.43 70.32 63.43 63.30 63.2162 . 2 6 62 . 1 9 62.95 61.70 61.51 61.42 61.8062.45 62.69 62 . 6 0 62.15 62.44 62 . 5 3 62.30 62.58 62.9362.52 62.63 62.55 63.09 62.84 62.95 63.32 63.00 63.16 62.56 63.13 62.37 TC 61.91 FL 62.41 TC 61.92 FL 63.04 TC 62.59 FL 63.65 TC 63.25 FL 64.83 TC 64.38 FL 66.04 TC 65.54 FL 66.80 TC 66.37 FL 68.05 TC 67.53 FL 69.79 TC 69.31 FL 70.65 TC 70.19 FL 68.93 TC 68.46 FL 67.95 TC 67.52 FL66.84 TC 66.32 FL65.03 TC 64.54 FL 63.90 TC 63.37 FL 62.19 TC 61.77 FL62.08 TC 61.62 FL 61.54 TC 61.49 FL 61.47 TC 61.39 FL 62.04 RIM 66.60 RIM 68.69 RIM 69.33 RIM 68.87 RIM 68.33 RIM 68.30 RIM 68.29 RIM 64.94 RIM 63.34 IE 66.29 IE62.38 TW 63.21 TW 68.02 TW 68.61 TW 67.60 TW 67.54 TW 70.75 TW 70.77 TW 70.83 TW 70.79 TW 70.79 TW 68.82 TW 65.22 TW 65.33 TW68.77 TW 68.70 TW 62.1 63.8 64.4 64.563.862.7 63.3 63.7 64.2 64.763.363.6 69.70 TW 69.71 TW 69.71 TW 69.75 TW 70.42 TW 70.31 TW 74.23 TW 74.24 TW 69.59 TW 74.36 TW 69.54 TW 69.54 TW 68.21 TW 63.61 63 . 6 2 68 . 3 2 63.73 67 . 4 0 63.36 68 . 6 7 63 . 6 3 69.16 64.55 64.80 69.02 65 66 67 6 2 6968 67 65.33 64.35 63.2362.91 62.71 63.36 63.27 64.15 64.47 65.06 66.06 TC 65.77 FL 64.91 65.17 TC64.85 FL 65.68 TC65.36 FL65.11 TC 64.64 FL 65.81 TC 65.50 FL EXISTING 1 STORY BUILDING EXISTING MULTI STORY BUILDING EXISTING MULTI STORY BUILDING EXISTING MULTI STORY BUILDING EXISTING MULTI STORY BUILDING EXISTING MULTI STORY BUILDING EXISTING 1 STORY BUILDING EXISTING 1 STORY BUILDING W W W W W W W W W W W W W W W W W W W S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S W W W W W W W W W W W W W W W W W W W WW W W W W W W W W S S G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G S S G G G G G GGG G G G G G G G G G G G G G G G G G G G OE OE OE OE OE OE OE OE OE OE OE OE OE OE OE OE OE OE OE OE OE OE OE OE OE OE OE OE OE OE E E E E E E E SD S S S S S S S SD SD SD SD W W W W W W W W W SD SD SD SD W W WW SD W W W W SD SD SD SD W W G G S WWW WW XXXXX X XXX XXX X X X X X X X XXXXXX X X X X X X X X X X X X X X X X X X XXXXXX X X X X X X X BMP 16 EXISTING 8' X 12' MODULAR WETLAND BMP; SEE DWG 515-5A / MS 16-06 BMP 17 EXISTING 8' X 12' MODULAR WETLAND BMP; SEE DWG 515-5A / MS 16-06 9'10' 19' 40 ' 30 ' 30 ' 60 ' CARLSBAD VILLAGE DRIVE HO P E A V E N U E GRAND AVENUE N 3 3 ° 5 7 ' 5 9 " W 6 1 . 9 0 ' N 11 ° 0 2 ' 0 1 " E 1 3 7 . 5 6 ' N 3 3 ° 5 7 ' 5 9 " W 2 0 9 . 9 4 ' PCL 1 PM 2868 APN: 203-320-40 BLOCK 67 MAP 775 N 56°00'18" E 328.77' TOTAL BASIN AREA =91,384 SF =2.10 AC 1ST FF = 68.60 POOLCOURTYARD 68.5 FS ME T E R S ME T E R S 1ST FF = 68.60 LEASING DMA 1 =5,452 SF =0.13 AC DMA 2 =4,838 SF =0.11 AC DMA 3 =5,825 SF =0.13 AC DMA 5 = 8,104 SF =0.19 AC DMA 4 =8,124 SF =0.19 AC DMA 7 =5,679 SF =0.13 AC DMA 6 =1,219 SF =0.03 AC PORT. DMA 10 =9,594 SF =0.22 AC PORT. DMA 10 =7,348 SF =0.17 AC DMA 11 =4,146 SF =0.10 AC BMP 12 A =271 SFBMP 11 A =139 SF N 55°58'09" E 35.02' N 56°51'49" E 162.88' N 3 3 ° 5 7 ' 2 9 " E 4 2 6 . 7 5 ' COURTYARD 68.5 FS 1ST FF = 68.60 1ST FF = 68.60 1ST FF = 68.60 DMA 8 =1,900 SF =0.04 AC DMA 9 =2,064 SF =0.05 AC DMA 12 =9,525 SF =0.22 AC L=43.20' R=55.00' D=45°00'00" N 56° 00' 18" E 5.00'N 33° 57' 29" E 15.00' 10-FT DIA. TREE WELL BMP 13 L=47.12' R=60.00' D=45°00'00" BMP 2 A =317 SF BMP 5 A =264 SF BMP 3 A =235 SF BMP 4 A =443 SF BMP 7 A =615 SF BMP 8 A =400 SF BMP 9 A =253 SF DMA 16 =2,092 SF =0.05 AC POC-2 BMP 10 A =555 SF DMA 17 =488 SF =0.01 AC DMA 19 DE-MINIMIS A=225 SF BMP 1 A =268 SF DMA 18 =1,166 SF =0.03 AC DMA 20 =605 SF =0.01 AC TRASH CAPTURE BMP FROG CREEK MUNDUS BAG TTC TRASH CAPTURE BMP FROG CREEK MUNDUS BAG TTC TRASH CAPTURE BMP FROG CREEK MUNDUS BAG TTC DMA 13 =1,252 SF =0.02 AC L=6.28' R=5.50' D=65°24'37" POC-1 DMA 14 =7,429 SF =0.17 AC EQ-1; EQUIVALENT AREA SWAP FOR UNTREATED DCV IN DMA 13, 14 & 15 A = 3,180 SF = 0.07 AC BMP 14 25-FT DIA. TREE WELL TRASH CAPTURE BMP FROG CREEK MUNDUS BAG TTC TRASH CAPTURE BMP FROG CREEK MUNDUS BAG TTC TRASH CAPTURE BMP FROG CREEK MUNDUS BAG TTC TRASH CAPTURE BMP FROG CREEK MUNDUS BAG TTC DMA 22 DE-MINIMIS A=250 SF; **SEE NOTE SHEET2 N 33° 58' 05" E 2.98' BMP 6 A=164 SF TRASH CAPTURE BMP FROG CREEK MUNDUS BAG TTC DMA 21 =29 SF =0.001 AC DMA 14-1: 2,804 SF PORTION OF DMA 14 NOT DRAINING TO BMP 14; AREA TO BE TREATED WITH EQUIVALENT AREA SWAP EQ-1 TRASH CAPTURE BMP FROG CREEK MUNDUS BAG TTC DMA 15 =276 SF =0.01 AC PLAN VIEW - DMA EXHIBIT SCALE: 1" = 30' HORIZONTAL J:\ACTIVE JOBS\3802 WERMERS\CIVIL\REPORTS\SWQMP\_FINAL\ATTA_1\3802-ATT1A-DMA.DWG 0 30 60 90 SCALE: 1" = 30 HORIZONTAL LEGEND PROPERTY LINE RIGHT-OF-WAY CENTERLINE OF ROAD EXISTING CONTOUR LINE PROPOSED CONTOUR LINE FLOW DIRECTION PROPOSED DMA BOUNDARY PROPOSED EQUIVALENT AREA SWAP BOUNDARY PROPOSED DISTURBED AREA INFEASIBLE TO REACH TREE WELL BMP PROPOSED EQUIVALENT AREA FOR DVC GENERATED FROM DMA 13, 14 & 15 (3,180 SF) PROPOSED DMA DRAINING TO EXISTING BMP PER MS 16-06 PROPOSED BIOFILTRATION BASIN / RAISED PLANTER BMP AREA PROPOSED DE MINIMIS AREA PER CITY OF CARLSBAD BMP DESIGN MANUAL SECTION 5.2.2 PROPOSED REMOVED / REPLACED HARDSCAPE TREATED BY EXISTING NORTHERLY BMP (BMP 16) PROPOSED REMOVED / REPLACED HARDSCAPE TREATED BY EXISTING SOUTHERLY BMP (BMP 17) PROPOSED SELF-MITIGATING AREA PER CITY OF CARLSBAD BMP DESIGN MANUAL 5.2.1 PROPOSED TREE WELL PROPOSED TRASH CAPTURE BMP FROG CREEK MUNDUS BAG TTC (PLACED INSIDE BMP RISERS) 150 150 BMP LEGEND POST-CONSTRUCTION SITE DESIGN BMPs SD-1 MAINTAIN NATURAL DRAINAGE PATHWAYS AND HYDROLOGIC FEATURES SD-2 CONSERVE NATURAL AREAS, SOILS AND VEGETATION SD-3 MINIMIZE IMPERVIOUS AREA SD-4 MINIMIZE SOIL COMPACTION SD-5 IMPERVIOUS AREA DISPERSION SD-6 RUNOFF COLLECTION SD-7 LANDSCAPING WITH NATIVE OR DROUGHT TOLERANT SPECIES SD-8 HARVIESTING AND USE PERCIPITATION POST-CONSTRUCTION SITE DESIGN BMPs SD-1 PREVENTION OF ILLICIT DISCHARGE INTO THE MS4 YES SD-2 STORM DRAIN STENCILING AND POSTING OF SIGNAGE YES SD-3 PROTECTED OUTDOOR MATERIALS STORAGE AREAS N/A SD-4 PROTECT MATERIAL STORED IN OUTDOOR WORK AREAS YES SD-5 ADDITIONAL BMPs BASED ON POTENTIAL RUNOFF POLLUTANTS: A ONSITE STARDOM DRAIN INLET YES D1 NEED FOR FUTURE INDOOR & STR. PEST CONTROL YES D2 LANDSCAPE / OUTDOOR PESTICIDE USE YES N FIRE SPRINKLER TEST WATER YES SOIL TYPE INFORMATION SOIL: TYPE D HYDROLOGIC SOILS PER WEB SOIL SURVEY APPLICATION AVAILABLE THROUGH UNITED STATES DEPARTMENT OF AGRICULTURE COARSE SEDIMENT YIELD NO CRITICAL COARSE SEDIMENT YIELD AREAS TO BE PROTECTED. REFER TO PRIORITY DEVELOPMENT PROJECT SWQMP PREPARED BY PASCO, LARET, SUITER AND ASSOCIATES GROUNDWATER INFORMATION GROUND WATER ENCOUNTERED AT DEPTHS OF 5-10 FT TREATMENT CONTROL BMPS BIOFILTRATION BF-1 TREE WELL SD-A PROJECT SITE AREA CALCULATIONS PLSA 3802 TOTAL GROSS SITE AREA 127,724 SF / 2.93 AC TOTAL DISTURBED AREA 87,710 SF / 2.01 AC EXISTING IMPERVIOUS AREA 50,139 SF / 1.15 AC EXISTING PERVIOUS AREA 34,833 SF / 0.79 AC TOTAL ONSITE REMOVED / REPLACED 67,116 SF / 1.54 AC IMPERVIOUS AREA TOTAL REMOVED / REPLACED 71,716 SF / 1.65 AC IMPERVIOUS AREA W/ ROW TOTAL DMA SIZE = 4,692 SF IMP. SIZING FACTOR = 0.03 (FOR BIOFILTRATION BMPS) MIN. AREA REQUIRED = 141 268 SF PROVIDED > 141 SF MINIMUM **STANDARD BIOFILTRATION SIZING MEET DMA 2 - AREA CALCULATIONS IMPERVIOUS AREA (BUILDING ROOF)4,521 SF PERVIOUS AREA (BIOFILTRATION BASIN)317 SF TOTAL BASIN AREA 4,838 SF IMPERVIOUS AREA %93.4% TOTAL DMA SIZE = 4,101 SF IMP. SIZING FACTOR = 0.03 (FOR BIOFILTRATION BMPS) MIN. AREA REQUIRED = 123 317 SF PROVIDED > 123 SF MINIMUM **STANDARD BIOFILTRATION SIZING MEET DMA 3 - AREA CALCULATIONS IMPERVIOUS AREA (BUILDING ROOF)5,590 SF PERVIOUS AREA (BIOFILTRATION BASIN)235 SF TOTAL BASIN AREA 5,825 SF IMPERVIOUS AREA %96.0% TOTAL DMA SIZE = 5,055 SF IMP. SIZING FACTOR = 0.03 (FOR BIOFILTRATION BMPS) MIN. AREA REQUIRED = 152 235 SF PROVIDED > 152 SF MINIMUM **STANDARD BIOFILTRATION SIZING MEET DMA 1 - AREA CALCULATIONS IMPERVIOUS AREA (BUILDING ROOF)5,184 SF PERVIOUS AREA (BIOFILTRATION BASIN)268 SF TOTAL BASIN AREA 5,452 SF IMPERVIOUS AREA %95.1% DMA 4 - AREA CALCULATIONS IMPERVIOUS AREA (BUILDING ROOF)7,681 SF PERVIOUS AREA (BIOFILTRATION BASIN)443 SF TOTAL BASIN AREA 8,124 SF IMPERVIOUS AREA %94.5% TOTAL DMA SIZE = 6,957 SF IMP. SIZING FACTOR = 0.03 (FOR BIOFILTRATION BMPS) MIN. AREA REQUIRED = 209 443 SF PROVIDED > 209 SF MINIMUM **STANDARD BIOFILTRATION SIZING MEET DMA 5 - AREA CALCULATIONS IMPERVIOUS AREA (BUILDING ROOF)7,840 SF PERVIOUS AREA (BIOFILTRATION BASIN)264 SF TOTAL BASIN AREA 8,104 SF IMPERVIOUS AREA %96.7% TOTAL DMA SIZE = 7,082 SF IMP. SIZING FACTOR = 0.03 (FOR BIOFILTRATION BMPS) MIN. AREA REQUIRED = 213 264 SF PROVIDED > 213 SF MINIMUM **STANDARD BIOFILTRATION SIZING MEET DMA 6 - AREA CALCULATIONS IMPERVIOUS AREA (BUILDING ROOF)1,055 SF PERVIOUS AREA (BIOFILTRATION BASIN)164 SF TOTAL BASIN AREA 1,219 SF IMPERVIOUS AREA %86.5% TOTAL DMA SIZE =966 SF IMP. SIZING FACTOR = 0.03 (FOR BIOFILTRATION BMPS) MIN. AREA REQUIRED = 29 164 SF PROVIDED > 29 SF MINIMUM **STANDARD BIOFILTRATION SIZING MEET SHEET 1 OF 4 ATTACHMENT 1A - DMA EXHIBIT HOPE APARTMENTS CITY OF CARLSBAD - CA 92008 8"TD(4) 8"TD (4) 10"TD 12"TD 14" T D 1 0 " T D 10 " T D 6"TD 6"TD 42"TC 16"TC 15"TC 12"TC 12"TD 11"TD 11"TD OEOEOEOEOEOEOEOEOEOEOEOEOE OEOEOEOEOE OEOE OE OEOEOEOEOEOEOE D D D D D D D E E WW R A M P 70 69 69 69 69 6 9 69 69 69 68 68 68 68 68 68 68 68 67 66 6 5 MON. WELL GEO GRIDTRANS PAD 67.84 TC 67.30 FL 67.73 TC 67.24 FL 68.49 TC 68.06 FL 68.59 TC 68.09 FL 68.61 TC 68.22 FL 69.33 TC 68.87 FL 68.98 TC 68.47 FL 68.79 TC 68.35 FL 68.97 TC 68.58 FL 69.12 TC 68.70 FL 68.47 TC 68.10 FL 69.16 TC 68.81 FL 69.52 TC 69.16 FL 69.08 TC 68.56 FL 69.50 TC 69.23 FL 69.58 TC 69.50 FL 68.30 TC 68.27 FL 68.64 TC 68.19 FL 68.44 TC 68.03 FL 68.17 TC 67.74 FL 68.48 TC 68.43 FL 68.98 TC 68.48 FL 69.22 TC 68.78 FL 68.09 TC 67.65 FL 69.30 TC 68.84 FL 68.52 TC 68.04 FL 68.96 TC 68.59 FL 69.30 TC 68.80 FL 69.12 TC 68.70 FL 68.94 TC 68.54 FL 68.58 TC 68.16 FL 68.34 TC 67.95 FL 68.36 TC 67.93 FL 68.70 TC 68.28 FL 67.58 TC 67.08 FL 67.88 TC 67.44 FL 67.68 67.77 67.89 68.00 68.41 68.79 68.32 67.90 67.66 68.54 68.6 9 68.21 68.63 69.38 69.43 69.55 69.44 69.51 69.39 69.42 69.4969.46 69.41 69.37 69.39 69.38 69.42 69.26 69.29 69.17 69.10 68.76 67.49 68.74 TC 68.24 FL 68.22 68.18 68.45 TC 68.00 FL 69.45 70.65 TC 70.19 FL 68.93 TC 68.46 FL 67.52 FL66.32 FL 68.33 RIM 68.30 RIM 68.29 RIM 66.29 IE 68.02 TW 68.61 TW 67.60 TW 67.54 TW 70.75 TW 70.77 TW 70.83 TW 70.79 TW 70.79 TW 64.80 69.02 EXISTING MULTI STORY BUILDING EXISTING MULTI STORY BUILDING EXISTING MULTI STORY BUILDING EXISTING MULTI STORY BUILDING WW SOEOEOEOEOEOEOE OE OEEEEEE S S S S SD SD SD SD W W W W W W W W W SD SD SD SD SD SD XXXXX X X X X X X X X X XXXX X X X X PROPOSED AREA DRAINING TO EXISTING NORTHERLY MODULAR WETLAND BMP; SEE DWG 515-5A / MS 16-06 A= 3,538 SF / 0.08 AC BMP 16 EXISTING 8' X 12' MODULAR WETLAND BMP; SEE DWG 515-5A / MS 16-06 BMP 17 EXISTING 8' X 12' MODULAR WETLAND BMP; SEE DWG 515-5A / MS 16-06 PROPOSED AREA DRAINING TO EXISTING NORTHERLY MODULAR WETLAND BMP; SEE DWG 515-5A / MS 16-06 A= 1,753 SF / 0.04 AC ADDITIONAL 1,539 SF OF IMPERVIOUS AREA USED TO SIZE EXISTING NORTHERLY BMP; SEE DMA 1 FROM DMA EXHIBIT FROM MS 16-06 IN THIS REPORT ADDITIONAL 2,363 SF OF IMPERVIOUS AREA USED TO SIZE EXISTING SOUTHERLY BMP; SEE DMA 2 ON DMA EXHIBIT FROM MS 16-06, INCLUDED FOR REFERENCE IN THIS REPORT DMA 22 DE MINIMIS A = 250 SF 8"TD(4) 8"TD (4) 10"TD 12"TD 14" T D 1 0 " T D 10 " T D 6"TD 6"TD 42"TC 16"TC 15"TC 12"TC 12"TD 11"TD 11"TD OEOEOEOEOEOEOEOEOEOEOEOEOE OEOEOEOEOE OEOE OE OEOEOEOEOEOEOE D D D D D D D E E WW R A M P 70 69 69 69 69 6 9 69 69 69 68 68 68 68 68 68 68 68 67 66 6 5 MON. WELL GEO GRIDTRANS PAD 67.84 TC 67.30 FL 67.73 TC 67.24 FL 68.49 TC 68.06 FL 68.59 TC 68.09 FL 68.61 TC 68.22 FL 69.33 TC 68.87 FL 68.98 TC 68.47 FL 68.79 TC 68.35 FL 68.97 TC 68.58 FL 69.12 TC 68.70 FL 68.47 TC 68.10 FL 69.16 TC 68.81 FL 69.52 TC 69.16 FL 69.08 TC 68.56 FL 69.50 TC 69.23 FL 69.58 TC 69.50 FL 68.30 TC 68.27 FL 68.64 TC 68.19 FL 68.44 TC 68.03 FL 68.17 TC 67.74 FL 68.48 TC 68.43 FL 68.98 TC 68.48 FL 69.22 TC 68.78 FL 68.09 TC 67.65 FL 69.30 TC 68.84 FL 68.52 TC 68.04 FL 68.96 TC 68.59 FL 69.30 TC 68.80 FL 69.12 TC 68.70 FL 68.94 TC 68.54 FL 68.58 TC 68.16 FL 68.34 TC 67.95 FL 68.36 TC 67.93 FL 68.70 TC 68.28 FL 67.58 TC 67.08 FL 67.88 TC 67.44 FL 67.68 67.77 67.89 68.00 68.41 68.79 68.32 67.90 67.66 68.54 68.6 9 68.21 68.63 69.38 69.43 69.55 69.44 69.51 69.39 69.42 69.4969.46 69.41 69.37 69.39 69.38 69.42 69.26 69.29 69.17 69.10 68.76 67.49 68.74 TC 68.24 FL 68.22 68.18 68.45 TC 68.00 FL 69.45 68.93 TC 68.46 FL 67.52 FL66.32 FL 68.33 RIM 68.30 RIM 68.29 RIM 66.29 IE 68.02 TW 68.61 TW 67.60 TW 67.54 TW 70.75 TW 70.77 TW 70.83 TW 70.79 TW 70.79 TW 64.80 69.02 EXISTING MULTI STORY BUILDING EXISTING MULTI STORY BUILDING EXISTING MULTI STORY BUILDING EXISTING MULTI STORY BUILDING XXXXX X X X X X X X X X XXXX X X X X BMP 16 EXISTING 8' X 12' MODULAR WETLAND BMP; SEE DWG 515-5A / MS 16-06 BMP 17 EXISTING 8' X 12' MODULAR WETLAND BMP; SEE DWG 515-5A / MS 16-06 EXISTING AREA DRAINING TO EXISTING SOUTHERLY BMP PER DWG 515-5A A= 5,077 SF / 0.12 AC EXISTING AREA DRAINING TO EXISTING SOUTHERLY BMP (BMP #14) PER DWG 515-5A A= 4,116 SF / 0.09 AC DMA 7 - AREA CALCULATIONS IMPERVIOUS AREA (BUILDING ROOF)5,064 SF PERVIOUS AREA (BIOFILTRATION BASIN)615 SF TOTAL BASIN AREA 5,679 SF IMPERVIOUS AREA %89.2% TOTAL DMA SIZE = 4,619 SF IMP. SIZING FACTOR = 0.03 (FOR BIOFILTRATION BMPS) MIN. AREA REQUIRED = 139 615 SF PROVIDED > 139 SF MINIMUM **STANDARD BIOFILTRATION SIZING MEET DMA 8 - AREA CALCULATIONS IMPERVIOUS AREA (BUILDING ROOF)1,500 SF PERVIOUS AREA (BIOFILTRATION BASIN)400 SF TOTAL BASIN AREA 1,900 SF IMPERVIOUS AREA %78.9% TOTAL DMA SIZE =1,390 SF IMP. SIZING FACTOR = 0.03 (FOR BIOFILTRATION BMPS) MIN. AREA REQUIRED = 42 435 SF PROVIDED > 42 SF MINIMUM **STANDARD BIOFILTRATION SIZING MEET DMA 9 - AREA CALCULATIONS DMA 18 & 20 - AREA CALCULATIONS TOTAL DMA 18 BASIN SIZE = 1,166 SF TOTAL DMA 20 BASIN SIZE = 605 SF SECTION 5.2.1 OF CITY OF CARLSBAD BMP DESIGN MANUAL ALLOWS FOR SELF-MITIGATING DMA AREAS THAT DRAIN DIRECTLY OFFSITE OR TO THE PUBLIC STORM DRAIN SYSTEM, WITH INCIDENTAL IMPERVIOUS AREAS THAT ARE LESS THAN 5% OF THE SELF-MITIGATING AREA. PLSA 3802 PLAN VIEW - EXISTING IMPERVIOUS AREA SCALE: 1" = 30' HORIZONTAL J:\ACTIVE JOBS\3802 WERMERS\CIVIL\REPORTS\SWQMP\_FINAL\ATTA_1\3802-ATT1A-DMA.DWG 0 30 60 80 SCALE: 1" = 30 HORIZONTAL PLAN VIEW - PROPOSED IMPERVIOUS AREA SCALE: 1" = 30' HORIZONTAL DMA 16 - AREA CALCULATION DMA 16 WILL UTILIZE AN EXISTING TREATMENT CONTROL BMP WITHIN THE PRIVATE DRIVE. THE EXISTING IMPERVIOUS AREA WITHIN THIS PROJECTS PORTION OF THE SHARED DRIVE DRAINING TO THE EXISTING BMPS IS APPROXIMATELY 5,077 SF AS SHOWN IN MS 16-06 SWQMP DMA EXHIBIT. THE PROJECT PROPOSES TO REPLACE IMPERVIOUS SURFACES WITH PERVIOUS SURFACES THUS REDUCING THE IMPERVIOUS AREA DRAINING TO THE EXISTING BMPS TO 3,538 SF; A REDUCTION OF 1,539 SF. DMA 10 - AREA CALCULATIONS IMPERVIOUS AREA (HARDSCAPE)8,500 SF (ROOF) 5,385 SF PERVIOUS AREA (LANDSCAPE)2,502 SF (BIOFILTRATION BASIN)555 SF TOTAL BASIN AREA 16,942 SF IMPERVIOUS AREA %82.0% TOTAL DMA SIZE = 13,303 IMP. SIZING FACTOR = 0.03 (FOR BIOFILTRATION BMPS) MIN. AREA REQUIRED = 399 555 SF PROVIDED > 399 SF MINIMUM **STANDARD BIOFILTRATION SIZING MEET DMA 11 - AREA CALCULATIONS IMPERVIOUS AREA (HARDSCAPE)2,689 SF PERVIOUS AREA (LANDSCAPE)1,318 SF (BIOFILTRATION BASIN)139 SF TOTAL BASIN AREA 4,146 SF IMPERVIOUS AREA %64.9% TOTAL DMA SIZE =2,829 SF IMP. SIZING FACTOR = 0.03 (FOR BIOFILTRATION BMPS) MIN. AREA REQUIRED = 85 139 SF PROVIDED > 85 SF MINIMUM **STANDARD BIOFILTRATION SIZING MEET DMA 17 - AREA CALCULATION DMA 17 WILL UTILIZE AN EXISTING TREATMENT CONTROL BMP WITHIN THE PRIVATE DRIVE. THE EXISTING IMPERVIOUS AREA WITHIN THIS PROJECTS PORTION OF THE SHARED DRIVE DRAINING TO THE EXISTING BMPS IS APPROXIMATELY 4,116 SF AS SHOWN IN MS 16-06 SWQMP DMA EXHIBIT. THE PROJECT PROPOSES TO REPLACE IMPERVIOUS SURFACES WITH PERVIOUS SURFACES THUS REDUCING THE IMPERVIOUS AREA DRAINING TO THE EXISTING BMPS TO 1,753 SF; A REDUCTION OF 2,363 SF. DMA 19 & 21 - AREA CALCULATIONS TOTAL DMA 19 BASIN SIZE = 225 SF %OF OVERALL IMPERVIOUS AREA = 225 SF / 69,999 SF = 0.3% TOTAL DMA 21 BASIN SIZE = 29 SF %OF OVERALL IMPERVIOUS AREA = 29 SF / X SF = 0.04% SECTION 5.2.2 OF CITY OF CARLSBAD BMP DESIGN MANUAL ALLOWS FOR DE MINIMIS DMA AREAS THAT ARE LESS THAN 250 SQUARE FEET. ALL THE DE MINIMIS AREAS REPRESENT LESS THAN TWO PERCENT OF THE TOTAL ADDED OR REPLACED IMPERVIOUS AREA, AND ARE NOT HYDRAULICALLY CONNECTED TO OTHER DE MINIMIS AREAS. LEGEND EXISTING IMPERVIOUS AREA TREATED BY EXISTING NORTHERLY BMP EXISTING IMPERVIOUS AREA TREATED BY EXISTING SOUTHERLY BMP PROPOSED REMOVED / REPLACED IMPERVIOUS AREA TREATED BY EXISTING NORTHERLY BMP PROPOSED REMOVED / REPLACED IMPERVIOUS AREA TREATED BY EXISTING SOUTHERLY BMP TOTAL DMA SIZE =1,706 SF IMP. SIZING FACTOR = 0.03 (FOR BIOFILTRATION BMPS) MIN. AREA REQUIRED = 52 253 SF PROVIDED > 52 SF MINIMUM **STANDARD BIOFILTRATION SIZING MEET SHEET 2 OF 4 DMA 19 - AREA CALCULATIONS TOTAL BASIN SIZE = 250 SF SECTION 5.2.2 OF CITY OF CARLSBAD BMP DESIGN MANUAL ALLOWS FOR DE MINIMIS DMA AREAS THAT ARE LESS THAN 250 SQUARE FEET. ALL THE DE MINIMIS AREAS REPRESENT LESS THAN TWO PERCENT OF THE TOTAL ADDED OR REPLACED IMPERVIOUS AREA, AND ARE NOT HYDRAULICALLY CONNECTED TO OTHER DE MINIMIS AREAS. **NOTE: RIDGELINE IN ROAD TO BE ADJUSTED TO PROVIDE A MAXIMUM 250 SQUARE FOOT DE MINIMIS AREA. (BMP 13) STRUCTURAL SOIL REQUIREMENT CALCULATIONS ATTACHMENT 1A - DMA EXHIBIT HOPE APARTMENTS CITY OF CARLSBAD - CA 92008 IMPERVIOUS AREA (BUILDING ROOF)1,811 SF PERVIOUS AREA (BIOFILTRATION BASIN)253 SF TOTAL BASIN AREA 2,064 SF IMPERVIOUS AREA %87.7% TOTAL DMA SIZE =7,525 SF IMP. SIZING FACTOR = 0.03 (FOR BIOFILTRATION BMPS) MIN. AREA REQUIRED = 226 271 SF PROVIDED > 226 SF MINIMUM **STANDARD BIOFILTRATION SIZING MEET DMA 12 - AREA CALCULATIONS IMPERVIOUS AREA (HARDSCAPE)2,727 SF (ROOF 5,143 SF PERVIOUS AREA (LANDSCAPE)1,609 SF (BIOFILTRATION BASIN)271 SF TOTAL BASIN AREA 9,525 SF IMPERVIOUS AREA %82.6% TOTAL DMA SIZE = 1,015 SF RUNOFF FACTOR = 0.82 85TH PRECENTILE RAINFALL DEPTH = 0.60 DCV = 50.75 CU FT 10-FT DIAMETER TREE WELL DVC CREDIT = 40.0 CU FT 50.75 CU FT - 40.0 CU FT = **10.75 CU. FT **10.75 CU. FT NOT TREATED BY BMP 13 WILL BE TREATED BY AN EQUIVALENT AREA EQ-1 AND WILL BE ROUTED TO BMP 14. DMA 13 - AREA CALCULATIONS IMPERVIOUS AREA (HARDSCAPE)1,076 SF PERVIOUS AREA (LANDSCAPE)155 SF TOTAL BASIN AREA 1,231 SF IMPERVIOUS AREA %87.4% A MINIMUM OF SOIL VOLUME OF 2 CUBIC FEET PER SQUARE FOOT OF CANOPY PROJECTION VOLUME IS PROVIDED FOR EACH TREE PER TREE WELL FACT SHEET SD-A 10-FT MATURE CANOPY DIAMETER (3.5 X 4.5' X 10' TREE WELL) SQUARE FEET OF CANOPY PROJECTION:(10/2)² * 3.14 = 78.5 SQUARE FEET VOLUME REQUIRED:78.5 * 2 = 157 CUBIC FEET VOLUME PROVIDED:3.5*4.5*10 = 157.5 CUBIC FEET 157.5 CU. FT PROVIDED > 157 CU. FT REQUIRED *ALL OF THE DISTURBED AREA WITHIN DMA 13 CANNOT BE FEASIBLY ROUTED TO A BMP; PER SECTION 3.5 OF THE CITY OF CARLSBAD BMP DESIGN MANUAL BMP 13 WILL TREAT AN AREA EQUIVALENT TO THE DCV GENERATED BY THE DISTURBED AREA WITHIN DMA 13 16"TC 42"TC 16"TC 15"TC 12"TDXXXX OEOEOEOEOEOEOEOEOEOEOEOE OE OEOE OE OE OE OEOEOEOEOE OEOEOEOEOEOEOE OE OEOE OEOEOE OE OE OEOEOEOEOEOEOEOEOEOEOEOE OE OE OEOE OE OE GG D S SS C E WW WWWOOD WALL 71 70 6967 67 6 6 66 6 5 64 63 63 63 62 62 GEO GRIDTRANS PAD 67.10 TC 67.84 TC 67.73 TC 67.24 FL 68.49 TC 68.06 FL 68.61 TC 68.22 FL 69.33 TC 68.87 FL 61.72 62.05 62.06 62.67 63.46 64.75 65.46 66.60 67.77 69.43 70.32 63.2162 . 2 6 62 . 1 9 61.51 61.42 63.13 62.37 TC 61.91 FL 62.41 TC 61.92 FL 63.04 TC 62.59 FL 63.65 TC 63.25 FL 64.83 TC 64.38 FL 66.04 TC 65.54 FL 66.80 TC 66.37 FL 68.05 TC 67.53 FL 69.79 TC 69.31 FL 70.65 TC 70.19 FL 68.93 TC 68.46 FL 67.95 TC 67.52 FL66.84 TC 66.32 FL65.03 TC 64.54 FL 63.90 TC 63.37 FL 62.19 TC 61.77 FL62.08 TC 61.62 FL 61.54 TC 61.49 FL 61.47 TC 61.39 FL 62.04 RIM 66.60 RIM 68.69 RIM 69.33 RIM 63.34 IE 66.29 IE62.38 TW 63.21 TW 68.02 TW 68.61 TW 67.60 TW 67.54 TW 69.70 TW 63.61 63.73 6 2 6968 67WWWWWWWWWWWWW W W W W W W S S S S S S S S S S S S S S S S S S S WW S S G G G G G G G G G G G G G G G G G G G G G G G S S G G OE OE OE OE OE OE OE OE OE OE OE OE OE OE OE OE OE OE OE E E E E E ES S S S W W SD SD SD W W WW W SD W W G G S S WWW WW XXXXX X XXXXXXXXX 30 ' 30 ' 60 ' GRAND AVENUE N 56°00'18" E 328.77' N 56° 00' 18" E 5.00'N 33° 57' 29" E 15.00' L=6.28' POC-1 DMA 14 =7,429 SF =0.17 AC EQ-1; EQUIVALENT AREA SWAP FOR UNTREATED DCV IN DMA 13, 14 & 15 A = 3,180 SF = 0.07 AC BMP 14 25-FT DIA. TREE WELL DMA 14-1: 2,804 SF PORTION OF DMA 14 NOT DRAINING TO BMP 14; AREA TO BE TREATED WITH EQUIVALENT AREA SWAP EQ-1 PLSA 3802 J:\ACTIVE JOBS\3802 WERMERS\CIVIL\REPORTS\SWQMP\_FINAL\ATTA_1\3802-ATT1A-DMA.DWG DMA 14 (*TREE WELL DMA) - AREA CALCULATIONS IMPERVIOUS AREA (HARDSCAPE)4,799 SF PERVIOUS AREA (LANDSCAPE)2,630 SF TOTAL BASIN AREA 7,429 SF IMPERVIOUS AREA %64.6% TOTAL DMA SIZE =5,108 SF DCV CALCULATION - DMA 14 AREA TRIBUTARY TO BMP (A)=7,429 SF (0.17 AC) TOTAL DMA SIZE (Cx * Ax)=5,108 SF (0.12 AC) WEIGHTED RUNOFF COEFFICIENT =0.69 85TH PERCENTILE STORM DEPTH = 0.60 IN DCV (C*D*A*3,600)=255.4 CU. FT 25-FT DIAMETER TREE WELL DVC CREDIT = 290.00 CU.FT 290.0 DCV CREDIT > 255.4DCV REQUIRED PLAN VIEW - GRAND AVENUE DMA SCALE: 1" = 30'0 30 60 90 SCALE: 1" = 30 HORIZONTAL SHEET 3 OF 4 (BMP 14) STRUCTURAL SOIL REQUIREMENT CALCULATIONS A MINIMUM OF SOIL VOLUME OF 2 CUBIC FEET PER SQUARE FOOT OF CANOPY PROJECTION VOLUME IS PROVIDED FOR EACH TREE PER TREE WELL FACT SHEET SD-A 25-FT MATURE CANOPY DIAMETER (5' X 10' X 26' TREE WELL) SQUARE FEET OF CANOPY PROJECTION:(25 2)² * 3.14 = 490.625 SQUARE FEET VOLUME REQUIRED:490.625 * 2 = 981.25 CUBIC FEET VOLUME PROVIDED:5'*10'*26' - 8 SF * 26' - 3 SF *26' = 1,014 CUBIC FEET 1,014 CU. FT PROVIDED > 981.25 CU. FT REQUIRED PROPOSED DMA BOUNDARY PROPOSED EQUIVALENT AREA SWAP BOUNDARY PROPOSED DISTURBED AREA INFEASIBLE TO REACH TREE WELLS BMP PROPOSED EQUIVALENT AREA FOR DMA 16 (4,471 SF); EXISTING IMPERVIOUS AREA PROPOSED TREE WELL LEGEND ATTACHMENT 1A - DMA EXHIBIT HOPE APARTMENTS CITY OF CARLSBAD - CA 92008 DMA 15 (*TREE WELL DMA) - AREA CALCULATIONS IMPERVIOUS AREA (HARDSCAPE)276 SF TOTAL BASIN AREA 276 SF IMPERVIOUS AREA %100.0% TOTAL DMA SIZE =248 SF DCV CALCULATION - DMA 15 AREA TRIBUTARY TO BMP (A)=276 SF (0.01 AC) TOTAL DMA SIZE (Cx * Ax)=248 SF (0.01 AC) WEIGHTED RUNOFF COEFFICIENT =0.9 85TH PERCENTILE STORM DEPTH = 0.60 IN DCV (C*D*A*3,600)=**12.4 CU. FT **RUNOFF FROM DMA 15 CAN NOT BE FEASIBLY ROUTED TO A BMP AND WILL BE TREATED WITH AN EQUIVALENT AREA IN DMA EQ-1 *ALL OF THE DISTURBED AREA WITHIN DMA 14 CANNOT BE FEASIBLY ROUTED TO THE TREE WELL (BMP 14); PER SECTION 3.5 OF THE CITY OF CARLSBAD BMP DESIGN MANUAL BMP 14 WILL TREAT AN AREA EQUIVALENT TO THE DCV GENERATED BY THE PORTION OF DISTURBED ARE WITHIN DMA 14 NOT DRAINING TO BMP 14 *ALL OF THE DISTURBED AREA WITHIN DMA 15 CANNOT BE FEASIBLY ROUTED TO A BMP; PER SECTION 3.5 OF THE CITY OF CARLSBAD BMP DESIGN MANUAL BMP 15 WILL TREAT AN AREA EQUIVALENT TO THE DCV GENERATED BY THE DISTURBED AREA WITHIN DMA 15 DMA 14 - EQUIVALENT AREA CALCULATIONS AREA OF DMA 14 NOT REACHING BMP 14 2,804 SF IMPERVIOUS AREA (HARDSCAPE)2,595 SF PERVIOUS AREA (LANDSCAPE)209 SF TOTAL BASIN AREA 2,804 SF IMPERVIOUS AREA %92.5% EQUIVALENT DCV CALCULATION - DMA 14 EQUIVALENT AREA TO BE TREATED (A)=2,804 SF (0.06 AC) TOTAL DMA SIZE (Cx * Ax)=2,398 SF (0.06 AC) WEIGHTED RUNOFF COEFFICIENT =0.86 85TH PERCENTILE STORM DEPTH = 0.60 IN EQUIVALENT DCV (C*D*A*3,600)=**119.9 CU. FT **PORTION OF DMA 14 THAT CAN NOT BE FEASIBLY ROUTED TO BMP 14 AND WILL BE TREATED WITH AN EQUIVALENT AREA IN DMA EQ-1 TOTAL DMA SIZE =2,398 SF EQ-1 (EQUIVALENT AREA) - AREA CALCULATIONS IMPERVIOUS AREA (EX. HARDSCAPE) 3,180 SF TOTAL BASIN AREA 3,180 SF IMPERVIOUS AREA %100.0% TOTAL DMA SIZE =2,862 SF DCV CALCULATION - EQ-1 AREA TRIBUTARY TO BMP (A)=3,180 SF (0.07 AC) TOTAL DMA SIZE (Cx * Ax)=2,862 SF (0.07 AC) WEIGHTED RUNOFF COEFFICIENT =0.9 85TH PERCENTILE STORM DEPTH = 0.60 IN DCV (C*D*A*3,600)=**143.1 CU. FT EQUIVALENT AREA SWAP SUMMARY **UNTREATED DCV GENERATED 10.8 CU. FT + 119.9 CU. FT + 12.4 CU. FT. BY DMAS 13, 14 & 15 = 143.1 CU. FT **TREATED DCV GENERATED 143.1 CU. FT BY EQ-1 143.1 CU. FT UNTREATED = 143.1 CU. FT TREATED EQUIVALENT AREA EQ-1 TREATS A DCV EQUAL TO OR GREATER THAN THE UNTREATED DCV GENERATED FROM DMA 13, 14 & 15 SEE TABLE FOR PONDING DEPTH 6" LAYER OF 3/4" CLEAN CRUSHED ROCK 18" THICK LAYER OF ENGINEERED SOIL; *SEE NOTE BELOW PLANTER WATERPROOFING PER SEPARATE BUILDING PLANS ROOF DOWNSPOUT PIPE TO CONVEY STORMWATER TO PLANTER DEEP ROOTED, DENSE, DROUGHT TOLERANT PLANTING SUITABLE FOR WELL-DRAINED SOIL CATCH BASIN BY BROOKS PRODUCTS OR APPROVED EQUAL FOR EMERGENCY BACKFLOW; SEE TABLE FOR SIZE 6" PVC OUTLET PIPE (TYP.) 3" 6" DIAMETER PERFORATE UNDERDRAIN PIPE PLANTER WATER PROOFING IMPERVIOUS LINER PER BUILDING PLANS FS ELEV. PER PLAN RAISED PLANTER WALL AND FOUNDATION PER SEPARATE BUILDING PLANS CBR2024-0862; REFER TO SEPARATE LANDSCAPE PLANS FOR COLOR AND FINISH TW ELEV. = PER PLAN FG= PER PLAN 12"X12"11 TERRACED WALL 1.0' C/O RIM EL. = TG PER PLAN + 1" RAISED PLANTER WALL AND FOUNDATOIN PER SEPARATE BUILDING PLANS CBR2024-0862; REFER TO SEPARATE LANDSCAPE PLANS FOR COLOR AND FINISH 3" LAYER OF 3/8" PEA GRAVEL 3" LAYER OF HYDRAULIC MULCH 12 TERRACED WALL SPLASH GUARD FOR ROOF DRAIN 9" 6"18"X18" NOTE: ALL PLANTERS SHALL HAVE 2" MINIMUM FREE BOARD *BIOFILTRATION "ENGINEERED SOIL" LAYER SHALL BE MINIMUM 18" DEEP "SANDY LOAM" SOIL MIX WITH NO MORE THAN 5% CLAY CONTENT. THE MIX SHALL CONTAIN 50-60% SAND, 20-30% COMPOST OR HARDWOOD MULCH, AND 20-30% TOPSOIL. PCC CURB & GUTTER (SIZE PER PLAN) PCC CURB & GUTTER (SIZE PER PLAN) B B A A 18" WIDE CURB CUT CENTERED ON TREE WELL (SEE DETAIL D-D) LA SPLASH PAD PER GS-5.06 LA 25' DIAMETER CANOPY STREET TREE WITH 982 CF MIN STRUCTURAL SOIL LIMITS OF 30 MIL PLASTIC IMPERMEABLE LINER ALONG SIDES OF STRUCTURAL SOIL 6" THICK, 18" DEEPENED EDGE SIDEWALK TREATMENT, SEE SECTION B-B BELOW TREE WELL GRATE COVER 4' X 8' CONSTRUCT CONTIGUOUS PCC SIDEWALK 4.0' CLEAR MIN LIMITS OF STRUCTURAL SOIL BELOW (5' DEEP X 10' X 26') ROOT BALL 26.0' LIMITS OF STRUCTURAL SOIL 6" SAND FILTER LAYER ROOT BARRIER PER SDRSD L-6 30 MIL PLASTIC IMPERMEABLE LINER *60" DEEP STRUCTURAL SOIL; STRUCTURAL PER A-1 STRUCTURAL SOIL OR APPROVED EQUAL DEEP ROOT TREE BUBBLER PER SDRSD DWG I-4 UNCOMPACTED SUBGRADE 30 MIL PLASTIC IMPERMEABLE LINER REMOVE AND REPLACE EXISTING SIDEWALK AS NECESSARY 8" ROOT BARRIER PER SDRSD L-6 30 MIL PLASTIC IMPERMEABLE LINER 3" MULCH 9.0' 8.0' TREE GRATE FRAME 9" X 30" TREE GRATE SUPPORT 4" X 8 SMOOTH DOWELS @ 18" OC, GREASED ON ONE END, TYP. ALL SIDES PER SDC GS DS GS-1.02 #4 @ 18" O.C. BOTH WAYS PER SDC GS DS GS-1.02 INSTALL 30 MIL PLASTIC IMPERMEABLE LINER WHERE CONCRETE IS POURED OVER ENGINEERED SOIL (TYP.) 4' X 8' CASCADE TREE GATE FRAME BY URBAN ACCESSORIES; INSTALL GRATE PER MANUFACTER'S SPECIFICATIONS 3" 6" PCC C&G PER SDRSD G-2 STREET FLOW COMPACTED SUBGRADE 1:1 CUT 10.0' LIMITS OF STRUCTURAL SOIL ROOT BARRIER PER SDRSD L-6 30 MIL PLASTIC IMPERMEABLE LINER 60" DEEP STRUCTURAL SOIL; STRUCTURAL PER A-1 STRUCTURAL SOIL OR APPROVED EQUAL DEEP ROOT TREE BUBBLER PER SDRSD DWG I-4 UNCOMPACTED SUBGRADE 3" MIN MULCH LAYER 4" OPENING FOR DRAINAGE 30 MIL PLASTIC IMPERMEABLE LINER SPLASH PAD PER SDC GS DS GS-5.06 6"8" PCC SIDEWALK PER SDRSD G-7 4.0' TREE GRATE FRAME 4" X 8" SMOOTH DOWELS @ 18" OC, GREASED ON ONE END, TYP. ALL SIDES PER SDC GS DS GS-1.00 #4 @ 18" O.C. BOTH WAYS PER SDC GS DS GS 1-.00 CURB CUT PER DETAIL THIS SHEET 4' X 8' CASCADE TREE GATE FRAME BY URBAN ACCESSORIES; INSTALL GRATE PER MANUFACTER'S SPECIFICATIONS 6" SAND FILTER LAYER 1:1 CUT PROPOSED RETAINING WALL PER DWG 544-4 PL COMPACTED SUBGRAED COMPACTED SUBGRAED ROOT BARRIER PER SDRSD L-6 9" X 30" TREE GRATE SUPPORT 3" 3 SF 8 SF 9" x 30" x 12" DEEP TYPE 1 SPLASH PAD PER SDC DS GS-5.06 (NO. 2 COARSE AGGREGATE ROCK) R=6" (TYP.) 6" PCC C&G PER SDRSD G-02GUTTER LIP 2 . 5 ' 1 . 0 ' 1 . 0 ' C C D 18" CURB CUT OPENING CENTERED AT TREE WELL LOCATION AS SHOWN ON SHEET 4 GUTTER LIP 4 . 5 ' G U T T E R D E P R E S S I O N 6" PCC C&G PER SDRSD G-02 LIMITS OF 9" X 30" TREE GRATE SUPPORT 6" PCC C&G PER SDRSD G-2 STREET FLOW COMPACTED SUBGRADE CURB CUT PER DETAIL THIS SHEET 30 MIL PLASTIC IMPERMEABLE LINER AND ROOT BARRIER 9" X 30" PCC TREE GRATE SUPPORT PER SDRSD L-4 SPLASH PAD PER GS-5.06 12" 12" TOP OF 6" PCC C&G TOP OF 6" PCC C&G 4.5' FLOWLINE (PER PLAN) FLOWLINE (PER PLAN)1" GUTTER DEPRESSION @ TREE WELL1" VERTICAL GUTTER TRANSITION OVER 1' HORIZONTAL * 1.5' CURB CUT OPENING 1.0' 1.0' 7" 1" 2.5' *REPLACE CURB TO NEAREST JOINT 6" PCC C&G PER SDRSD G-2 STREET FLOW COMPACTED SUBGRADE 6" SAND FILTER LAYER 4.5' LIMITS OF STRUCTURAL SOIL ROOT BARRIER PER SDRSD L-6 30 MIL PLASTIC IMPERMEABLE LINER 42" DEEP STRUCTURAL SOIL; STRUCTURAL PER A-1 STRUCTURAL SOIL OR APPROVED EQUAL UNCOMPACTED SUBGRADE 3" MIN MULCH LAYER ROOT BALL 1" 7" DEPRESSION @ CURB CUT PER DETAIL B-B 30 MIL PLASTIC IMPERMEABLE LINER SPLASH PAD PER SDC GS DS GS-5.06 4:1 6" 30 MIL PLASTIC IMPERMEABLE LINER ADJACENT LANDSCAPED AREA COMPACTED SUBGRADE 8" PERFORATED PVC STORM DRAIN 63.65 IE OUT; CONNECT TO PVT STORM DRAIN 67.65 FG 1.0' 1.0' 6" SAND FILTER LAYER 10.0' LIMITS OF STRUCTURAL SOIL ROOT BARRIER PER SDRSD L-6 30 MIL PLASTIC IMPERMEABLE LINER 42" DEEP STRUCTURAL SOIL; STRUCTURAL PER A-1 STRUCTURAL SOIL OR APPROVED EQUAL UNCOMPACTED SUBGRADE COMPACTED SUBGRADE ROOT BALL 30 MIL PLASTIC IMPERMEABLE LINER 3" MULCH ADJACENT LANDSCAPED AREA ON PROJECT SITE COMPACTED SUBGRADE 4:1 ADJACENT LANDSCAPED AREA ON PROJECT SITE ROOT BARRIER PER SDRSD L-6 30 MIL PLASTIC IMPERMEABLE LINER 3" MULCH 8" PVC PERFORATED STORM DRAIN 63.65 IE; CONNECT TO PVT STORM DRAIN 10' DIAMETER CANOPY STREET TREE WITH 157 CF MIN STRUCTURAL SOIL** PCC CURB & GUTTER (SIZE PER PLAN) PCC CURB & GUTTER (SIZE PER PLAN) B B A A LIMIT OF STRUCTUAL SOIL LA LIMITS OF 30 MIL PLASTIC IMPERMEABLE LINER ALONG SIDES OF STRUCTURAL SOIL SPLASH PAD PER GS-5.06 LA 4.5'4:1 SLOPE 4:1 SLOPE GRATE SIZEBMP 1 2 3 4 5 6 7 8 9 10 12"X12"11 PONDING DEPTH LOCATION TYPE PODIUM LEVEL TERRACED WALL TERRACED WALL PODIUM LEVEL PODIUM LEVEL PODIUM LEVEL PODIUM LEVEL PODIUM LEVEL PODIUM LEVEL PODIUM LEVEL 10" 12"X12" 2 -12"X12" 24" X 24" 18"X18" 16" 12 TERRACED WALL 12"X12" PODIUM LEVEL 10" 9" 16" 16" 16" 10" 6" 2 -12"X12" 3 -12"X12" 6" 12"X12" 12"X12" 12"X12" 6" 6"18"X18" ATTACHMENT 1A - DMA EXHIBIT HOPE APARTMENTS CITY OF CARLSBAD - CA 92008 PLSA 3802 J:\ACTIVE JOBS\3802 WERMERS\CIVIL\REPORTS\SWQMP\_FINAL\ATTA_1\3802-ATT1A-DMA.DWG TYPICAL DETAIL - RAISED PLANTER BMP NOT TO SCALE PLAN VIEW - CURB CUT @ TREE WELL (BMP 14) NOT TO SCALE NOT TO SCALE NOT TO SCALE PLAN VIEW - CURB CUT @ TREE WELL SDC GS DS GS-5.01 (BMP 13 & 14) NOT TO SCALE SECTION C-C CURB CUT @ TREE WELL SDC GS DS GS-5.01 (BMP 13 & 14) NOT TO SCALE SECTION D-D CURB CUT @ TREE WELL SDC GS DS GS-5.01 (BMP 13 & 14) NOT TO SCALE PERMANENT WATER QUALITY TREATMENT FACILITY KEEPING OUR WATERWAYS CLEAN MAINTAIN WITH CARE - NO MODIFICATIONS WITHOUT AGENCY APPROVAL **** WATER QUALITY SIGN TO BE INCLUDED W/ EACH BASIN SHEET 4 OF 4 SECTION A-A TREE WELL W/ GRATE MODIFIED SDC GS 1.02 (LARGE TREE WELL - BMP 14) SECTION B-B TREE WELL W/ GRATE MODIFIED SDC GS 1.02 (LARGE TREE WELL - BMP 14) NOT TO SCALE SECTION B-B TREE WELL W/ GRATE MODIFIED SDC GS 1.02 (TREE WELL - BMP 13) NOT TO SCALE SECTION A-A TREE WELL W/ GRATE MODIFIED SDC GS 1.02 (TREE WELL - BMP 13) PLAN VIEW - CURB CUT @ TREE WELL (BMP 13) NOT TO SCALE OTIS G E N 3 350 0 L B / 3 5 0 F P M 5'-6" P I T 13'- 7 " O V E R R U N 7'-9 " C A B H E I G H T C L R 100 ' M A X . T R A V E L NO P I T L A D D E R R E C E S S R E Q ' D 9'-0" ( 8 ' - 8 " r e q ' d ) 6'-11" OTIS G E N 3 3500 L B / 3 5 0 F P M 5'-6 " P I T 13' - 7 " O V E R R U N 7'-9 " C A B H E I G H T C L R 100' M A X . T R A V E L NO P I T L A D D E R R E C E S S R E Q ' D 9'-0" ( 8 ' - 8 " r e q ' d ) 6'-11" 30" D I A . 30 48 SIDE APPR O A C H +54 " M A X . A . F . S . 1 SIDE CLR. 1 SIDE CLR. 30" D I A . 30 48 SIDE APPR O A C H +54 " M A X . A . F . S . 1 SIDE CLR. 1 SIDE CLR. 30" D I A . 30 48SIDE APPR O A C H +54" M A X . A . F . S . 1 SIDE CLR. 1 SIDE CLR. 30" D I A . 30 48SIDE APPR O A C H +54" M A X . A . F . S . 1 SIDE CLR. 1 SIDE CLR. E.P. HUB MOVABLEISLAND E.P. HUB HUB MOV A B L E ISL A N D CBCB E.P. MOV A B L E ISL A N D FU R N I T U R E PIE C E HUB E.P. MO V A B L E IS L A N D FUR N I T U R E PIE C E CBCB E.P. HUB E.P. HUB FIX E D IS L A N D MOV A B L E ISLA N D FUR N I T U R E PIEC E CB CB E.P. HUB HUB MOVABLEISLAND CB CB E.P. HUB E.P. HUB E.P. MOVABLEISLANDFURNITUREPIECE HUB E.P. HUB MOVABLEISLAND CB CB E.P. E.P. HUB MO V A B L E IS L A N D FUR N I T U R E PIE C E E.P. HUB MOVABLEISLANDFURNITUREPIECE E.P. HUB MOVABLEISLANDFURNITUREPIECE E.P. HUB MOV A B L E ISL A N D FU R N I T U R E PIE C E E.P. HU B MOV A B L E ISL A N D FU R N I T U R E PIE C E E.P. HU B MOVABLEISLAND MOVABLEISLAND MOVABLEISLAND MOV A B L E ISL A N D MO V A B L E IS L A N D HUB MO V A B L E IS L A N D CB CB E.P. HUB MO V A B L E IS L A N D CBCB E.P. HUB MOVABLEISLAND CB CB E.P. MOVABLEISLANDFURNITUREPIECE CB CB E.P. HUB MO V A B L E ISL A N D FUR N I T U R E PIE C E HUB E.P. MOVABLEISLANDFURNITUREPIECE CB CB E.P. HUB MOVABLEISLAND TRASH RM. TRASH RM. SHAFT STOR. STAIR 1 SEE SHT A3.23 STAIR 2 SEE SHT A3.24 STAIR 4 SEE SHT A3.25 SHAFT E.P. MOVABLEISLANDFURNITUREPIECE HUB E.P. HUB E. P . HUB MOVABLEISLANDFURNITUREPIECE E.P.HUBOTIS G E N 3 350 0 L B / 3 5 0 F P M 5'-6" P I T 13'-7 " O V E R R U N 7'-9" C A B H E I G H T C L R 100 ' M A X . T R A V E L NO P I T L A D D E R R E C E S S R E Q ' D 9'-0" ( 8 ' - 8 " r e q ' d ) 6'-11" MOVABLEISLAND CB CB E.P. HUB MOVABLEISLAND ROOF AMENITY MOVABLEISLAND CB CB E.P. HUB SEE SHT A3.1.17 418 C1B SEE SHT A3.1.11 420 B2A SEE SHT A3.1.11 422 B2A SEE SHT A3.1.7 430 A3B SEE SHT A3.1.15 432 C1 SEE SHT A3.1.10 427 B2 SEE SHT A3.1.10 413 B2 SEE SHT A3.1.10 402 B2 SEE SHT A3.1.10 414 B2 SEE SHT A3.1.10 434 B2 SEE SHT A3.1.4 425 A2 SEE SHT A3.1.4 401 A2 SEE SHT A3.1.4 446 A2 SEE SHT A3.1.4A 439 A2A SEE SHT A3.1.4 438 A2 SEE SHT A3.1.8 416 B1 SEE SHT A3.1.8 415 B1 SEE SHT A3.1.8 423 B1 SEE SHT A3.1.8 435 B1 SEE SHT A3.1.13 417 B3 SEE SHT A3.1.3 419 A1 SEE SHT A3.1.3 412 A1 SEE SHT A3.1.3 411 A1 SEE SHT A3.1.3 407 A1 SEE SHT A3.1.3 441 A1 SEE SHT A3.1.3 429 A1 SEE SHT A3.1.13 409 B3 SEE SHT A3.1.16 410 C1A SEE SHT A3.1.2 437 A0 SEE SHT A3.1.2A 447 A0A SEE SHT A3.1.2 408 A0 SEE SHT A3.1.2 436 A0 SEE SHT A3.1.14 442 B4 SEE SHT A3.1.12 440 B2B SEE SHT A3.1.1 404 S1 SEE SHT A3.1.1 406 S1 SEE SHT A3.1.9 403 B1A SEE SHT A3.1.8 449 B1 SEE SHT A3.1.14 448 B4 SEE SHT A3.1.10 450 B2 2FB 2FB 2FB 2FB 2FB 2FB 2FB 2FB 2FB2FB2FB2FB2FB 2FB 2FB 2FB 2FB 2FB 2FB 2FB2FB 2FB 2FB 2FB IDF IDF IDF STOR. S.A. = 1658 SQ. FT. 2355 SQ. FT. 1055 SQ. FT. 3257 SQ. FT. 1735 SQ. FT. 1330 SQ. FT. 2259 SQ. FT. 1589 SQ. FT. 1988 SQ. FT. 3397 SQ. FT. 1059 SQ. FT. 2177 SQ. FT. 1310 SQ. FT. 2264 SQ. FT. 1403 SQ. FT. 1682 SQ. FT. 1390 SQ. FT. 1936 SQ. FT.1130 SQ. FT. 1807 SQ. FT. 1617 SQ. FT. 1204 SQ. FT. 1637 SQ. FT. 4204 SQ. FT. 1500 SQ. FT. 1811 SQ. FT. 2258 SQ. FT. 1.1 1.1 2.9 2.9 5.8 5.8 8.9 8.9 A1 A1 D3 D3 G9 G9 K9 K9 Q Q 12.9 13 1 A A 1 13 12.9 2 A9.1 1 A9.2 2 A9.3 1 A9.3 1 A9.4 1 A9.4 1 A9.5 2 A9.5 3 A9.5 4 A9.5 3 4 3 4 5 5 1401 N. Batavia, #103 Orange, CA 92867 Ph: 714-538-3802;Fx: 714-538-3812 ConsultingTADTADConsulting Henry Cao Seal Consultant S H E E T Client Project Number: Plan Check Number: 2021-0109 # HO P E AP A R T M E N T S 94 5 & 9 5 5 G R A N D A V E . CA R L S B A D , C A 9 2 0 0 8 1ST CITY SUBMITTAL 04/08/2024 WERMERS PROPERTIES 5120 SHOREHAM PLACE, SUITE 150 SAN DIEGO, CA 92122 (858)535-1475 / info@wermerscompanies.com BUILDNG OVERALL ROOF PLAN 1/16"=1'-0"1 P6.5 PL U M B I N G B U I L D I N G RO O F P L A N KEYPLAN SEGMENT 1 SEGMENT 2 SEGMENT 4 SEGMENT 3 Category # Description i ii iii iv v vi vii viii ix x Units 1 Drainage Basin ID or Name 1 2 3 4 5 6 7 8 9 10 unitless 2 85th Percentile 24-hr Storm Depth 0.60 0.60 0.60 0.60 0.60 0.60 0.60 0.60 0.60 0.60 inches 3 Impervious Surfaces Not Directed to Dispersion Area (C=0.90) 5,184 4,521 5,590 7,681 7,840 1,055 5,064 1,500 1,811 13,885 sq-ft 4 Semi-Pervious Surfaces Not Serving as Dispersion Area (C=0.30) 2,502 sq-ft 5 Engineered Pervious Surfaces Not Serving as Dispersion Area (C=0.10) 268 317 235 443 264 164 615 400 253 555 sq-ft 6 Natural Type A Soil Not Serving as Dispersion Area (C=0.10) sq-ft 7 Natural Type B Soil Not Serving as Dispersion Area (C=0.14) sq-ft 8 Natural Type C Soil Not Serving as Dispersion Area (C=0.23) sq-ft 9 Natural Type D Soil Not Serving as Dispersion Area (C=0.30) sq-ft 10 Does Tributary Incorporate Dispersion, Tree Wells, and/or Rain Barrels? No No No No No No No No No No yes/no 11 Impervious Surfaces Directed to Dispersion Area per SD-B (Ci=0.90) sq-ft 12 Semi-Pervious Surfaces Serving as Dispersion Area per SD-B (Ci=0.30) sq-ft 13 Engineered Pervious Surfaces Serving as Dispersion Area per SD-B (Ci=0.10) sq-ft 14 Natural Type A Soil Serving as Dispersion Area per SD-B (Ci=0.10) sq-ft 15 Natural Type B Soil Serving as Dispersion Area per SD-B (Ci=0.14) sq-ft 16 Natural Type C Soil Serving as Dispersion Area per SD-B (Ci=0.23) sq-ft 17 Natural Type D Soil Serving as Dispersion Area per SD-B (Ci=0.30) sq-ft 18 Number of Tree Wells Proposed per SD-A # 19 Average Mature Tree Canopy Diameter ft 20 Number of Rain Barrels Proposed per SD-E # 21 Average Rain Barrel Size gal 22 Total Tributary Area 5,452 4,838 5,825 8,124 8,104 1,219 5,679 1,900 2,064 16,942 sq-ft 23 Initial Runoff Factor for Standard Drainage Areas 0.86 0.85 0.87 0.86 0.87 0.79 0.81 0.73 0.80 0.79 unitless 24 Initial Runoff Factor for Dispersed & Dispersion Areas 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 unitless 25 Initial Weighted Runoff Factor 0.86 0.85 0.87 0.86 0.87 0.79 0.81 0.73 0.80 0.79 unitless 26 Initial Design Capture Volume 234 206 253 349 353 48 230 69 83 669 cubic-feet 27 Total Impervious Area Dispersed to Pervious Surface 0 0 0 0 0 0 0 0 0 0 sq-ft 28 Total Pervious Dispersion Area 0 0 0 0 0 0 0 0 0 0 sq-ft 29 Ratio of Dispersed Impervious Area to Pervious Dispersion Area n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a ratio 30 Adjustment Factor for Dispersed & Dispersion Areas 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 ratio 31 Runoff Factor After Dispersion Techniques 0.86 0.85 0.87 0.86 0.87 0.79 0.81 0.73 0.80 0.79 unitless 32 Design Capture Volume After Dispersion Techniques 234 206 253 349 353 48 230 69 83 669 cubic-feet 33 Total Tree Well Volume Reduction 0 0 0 0 0 0 0 0 0 0 cubic-feet 34 Total Rain Barrel Volume Reduction 0 0 0 0 0 0 0 0 0 0 cubic-feet 35 Final Adjusted Runoff Factor 0.86 0.85 0.87 0.86 0.87 0.79 0.81 0.73 0.80 0.79 unitless 36 Final Effective Tributary Area 4,689 4,112 5,068 6,987 7,050 963 4,600 1,387 1,651 13,384 sq-ft 37 Initial Design Capture Volume Retained by Site Design Elements 0 0 0 0 0 0 0 0 0 0 cubic-feet 38 Final Design Capture Volume Tributary to BMP 234 206 253 349 353 48 230 69 83 669 cubic-feet False False Automated Worksheet B.1: Calculation of Design Capture Volume (V2.0) Dispersion Area, Tree Well & Rain Barrel Inputs (Optional) Standard Drainage Basin Inputs Results Tree & Barrel Adjustments Initial Runoff Factor Calculation Dispersion Area Adjustments No Warning Messages Category # Description i x Units 1 Drainage Basin ID or Name 11 12 unitless 2 85th Percentile 24-hr Storm Depth 0.60 0.60 inches 3 Impervious Surfaces Not Directed to Dispersion Area (C=0.90) 2,689 7,870 sq-ft 4 Semi-Pervious Surfaces Not Serving as Dispersion Area (C=0.30) 1,318 1,609 sq-ft 5 Engineered Pervious Surfaces Not Serving as Dispersion Area (C=0.10) 139 271 sq-ft 6 Natural Type A Soil Not Serving as Dispersion Area (C=0.10) sq-ft 7 Natural Type B Soil Not Serving as Dispersion Area (C=0.14) sq-ft 8 Natural Type C Soil Not Serving as Dispersion Area (C=0.23) sq-ft 9 Natural Type D Soil Not Serving as Dispersion Area (C=0.30) sq-ft 10 Does Tributary Incorporate Dispersion, Tree Wells, and/or Rain Barrels? No No yes/no 11 Impervious Surfaces Directed to Dispersion Area per SD-B (Ci=0.90) sq-ft 12 Semi-Pervious Surfaces Serving as Dispersion Area per SD-B (Ci=0.30) sq-ft 13 Engineered Pervious Surfaces Serving as Dispersion Area per SD-B (Ci=0.10) sq-ft 14 Natural Type A Soil Serving as Dispersion Area per SD-B (Ci=0.10) sq-ft 15 Natural Type B Soil Serving as Dispersion Area per SD-B (Ci=0.14) sq-ft 16 Natural Type C Soil Serving as Dispersion Area per SD-B (Ci=0.23) sq-ft 17 Natural Type D Soil Serving as Dispersion Area per SD-B (Ci=0.30) sq-ft 18 Number of Tree Wells Proposed per SD-A # 19 Average Mature Tree Canopy Diameter ft 20 Number of Rain Barrels Proposed per SD-E # 21 Average Rain Barrel Size gal 22 Total Tributary Area 4,146 9,750 sq-ft 23 Initial Runoff Factor for Standard Drainage Areas 0.68 0.78 unitless 24 Initial Runoff Factor for Dispersed & Dispersion Areas 0.00 0.00 unitless 25 Initial Weighted Runoff Factor 0.68 0.78 unitless 26 Initial Design Capture Volume 141 380 cubic-feet 27 Total Impervious Area Dispersed to Pervious Surface 0 0 sq-ft 28 Total Pervious Dispersion Area 0 0 sq-ft 29 Ratio of Dispersed Impervious Area to Pervious Dispersion Area n/a n/a ratio 30 Adjustment Factor for Dispersed & Dispersion Areas 1.00 1.00 ratio 31 Runoff Factor After Dispersion Techniques 0.68 0.78 unitless 32 Design Capture Volume After Dispersion Techniques 141 380 cubic-feet 33 Total Tree Well Volume Reduction 0 0 cubic-feet 34 Total Rain Barrel Volume Reduction 0 0 cubic-feet 35 Final Adjusted Runoff Factor 0.68 0.78 unitless 36 Final Effective Tributary Area 2,819 7,605 sq-ft 37 Initial Design Capture Volume Retained by Site Design Elements 0 0 cubic-feet 38 Final Design Capture Volume Tributary to BMP 141 380 cubic-feet False False Automated Worksheet B.1: Calculation of Design Capture Volume (V2.0) Dispersion Area, Tree Well & Rain Barrel Inputs (Optional) Standard Drainage Basin Inputs Results Tree & Barrel Adjustments Initial Runoff Factor Calculation Dispersion Area Adjustments No Warning Messages Category # Description i ii iii iv v vi vii viii ix x Units 1 Drainage Basin ID or Name 1 2 3 4 5 6 7 8 9 10 unitless 2 85th Percentile Rainfall Depth 0.60 0.60 0.60 0.60 0.60 0.60 0.60 0.60 0.60 0.60 inches 3 Predominant NRCS Soil Type Within BMP Location D D D D D D D D D D unitless 4 Is proposed BMP location Restricted or Unrestricted for Infiltration Activities? Restricted Restricted Restricted Restricted Restricted Restricted Restricted Restricted Restricted Restricted unitless 5 Nature of Restriction unitless 6 Do Minimum Retention Requirements Apply to this Project? Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes yes/no 7 Are Habitable Structures Greater than 9 Stories Proposed? No No No No No No No No No No yes/no 8 Has Geotechnical Engineer Performed an Infiltration Analysis? No No No No No No No No No No yes/no 9 Design Infiltration Rate Recommended by Geotechnical Engineer in/hr 10 Design Infiltration Rate Used To Determine Retention Requirements 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 in/hr 11 Percent of Average Annual Runoff that Must be Retained within DMA 4.5% 4.5% 4.5% 4.5% 4.5% 4.5% 4.5% 4.5% 4.5% 4.5% percentage 12 Fraction of DCV Requiring Retention 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.02 ratio 13 Required Retention Volume 5 4 5 7 7 1 5 1 2 13 cubic-feet False False Automated Worksheet B.2: Retention Requirements (V2.0) Advanced Analysis Basic Analysis Result No Warning Messages Category # Description i x Units 1 Drainage Basin ID or Name 11 12 unitless 2 85th Percentile Rainfall Depth 0.60 0.60 inches 3 Predominant NRCS Soil Type Within BMP Location D D unitless 4 Is proposed BMP location Restricted or Unrestricted for Infiltration Activities? Restricted Restricted unitless 5 Nature of Restriction unitless 6 Do Minimum Retention Requirements Apply to this Project? Yes Yes yes/no 7 Are Habitable Structures Greater than 9 Stories Proposed? No No yes/no 8 Has Geotechnical Engineer Performed an Infiltration Analysis? No No yes/no 9 Design Infiltration Rate Recommended by Geotechnical Engineer in/hr 10 Design Infiltration Rate Used To Determine Retention Requirements 0.000 0.000 in/hr 11 Percent of Average Annual Runoff that Must be Retained within DMA 4.5% 4.5% percentage 12 Fraction of DCV Requiring Retention 0.02 0.02 ratio 13 Required Retention Volume 3 8 cubic-feet False False Automated Worksheet B.2: Retention Requirements (V2.0) Advanced Analysis Basic Analysis Result No Warning Messages Category #Description i ii iii iv v vi vii viii ix x Units 1 Drainage Basin ID or Name 1 2 3 4 5 6 7 8 9 10 sq-ft 2 Design Infiltration Rate Recommended 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 in/hr 3 Design Capture Volume Tributary to BMP 234 206 253 349 353 48 230 69 83 669 cubic-feet 4 Is BMP Vegetated or Unvegetated?Vegetated Vegetated Vegetated Vegetated Vegetated Vegetated Vegetated Vegetated Vegetated Vegetated unitless 5 Is BMP Impermeably Lined or Unlined?Lined Lined Lined Lined Lined Lined Lined Lined Lined Lined unitless 6 Does BMP Have an Underdrain?Underdrain Underdrain Underdrain Underdrain Underdrain Underdrain Underdrain Underdrain Underdrain Underdrain unitless 7 Does BMP Utilize Standard or Specialized Media?Standard Standard Standard Standard Standard Standard Standard Standard Standard Standard unitless 8 Provided Surface Area 268 317 235 443 264 164 615 400 253 555 sq-ft 9 Provided Surface Ponding Depth 10 10 6 10 6 16 16 16 16 6 inches 10 Provided Soil Media Thickness 21 21 21 21 21 21 21 21 21 21 inches 11 Provided Gravel Thickness (Total Thickness)9 9 9 9 9 9 9 9 9 9 inches 12 Underdrain Offset 3 3 3 3 3 3 3 3 3 3 inches 13 Diameter of Underdrain or Hydromod Orifice (Select Smallest)6.00 6.00 6.00 6.00 6.00 6.00 6.00 6.00 6.00 6.00 inches 14 Specialized Soil Media Filtration Rate in/hr 15 Specialized Soil Media Pore Space for Retention unitless 16 Specialized Soil Media Pore Space for Biofiltration unitless 17 Specialized Gravel Media Pore Space unitless 18 Volume Infiltrated Over 6 Hour Storm 0 0 0 0 0 0 0 0 0 0 cubic-feet 19 Ponding Pore Space Available for Retention 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 unitless 20 Soil Media Pore Space Available for Retention 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 unitless 21 Gravel Pore Space Available for Retention (Above Underdrain)0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 unitless 22 Gravel Pore Space Available for Retention (Below Underdrain)0.40 0.40 0.40 0.40 0.40 0.40 0.40 0.40 0.40 0.40 unitless 23 Effective Retention Depth 2.25 2.25 2.25 2.25 2.25 2.25 2.25 2.25 2.25 2.25 inches 24 Fraction of DCV Retained (Independent of Drawdown Time)0.21 0.29 0.17 0.24 0.14 0.64 0.50 1.09 0.57 0.16 ratio 25 Calculated Retention Storage Drawdown Time 120 120 120 120 120 120 120 120 120 120 hours 26 Efficacy of Retention Processes 0.23 0.30 0.19 0.26 0.16 0.56 0.46 0.79 0.51 0.18 ratio 27 Volume Retained by BMP (Considering Drawdown Time)54 61 48 89 57 27 106 54 43 121 cubic-feet 28 Design Capture Volume Remaining for Biofiltration 180 145 205 260 296 21 124 15 40 548 cubic-feet 29 Max Hydromod Flow Rate through Underdrain 1.5914 1.5914 1.4948 1.5914 1.4948 1.7261 1.7261 1.7261 1.7261 1.4948 cfs 30 Max Soil Filtration Rate Allowed by Underdrain Orifice 256.52 216.87 274.80 155.19 244.61 454.68 121.25 186.42 294.73 116.35 in/hr 31 Soil Media Filtration Rate per Specifications 5.00 5.00 5.00 5.00 5.00 5.00 5.00 5.00 5.00 5.00 in/hr 32 Soil Media Filtration Rate to be used for Sizing 5.00 5.00 5.00 5.00 5.00 5.00 5.00 5.00 5.00 5.00 in/hr 33 Depth Biofiltered Over 6 Hour Storm 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 30.00 inches 34 Ponding Pore Space Available for Biofiltration 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 unitless 35 Soil Media Pore Space Available for Biofiltration 0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.20 unitless 36 Gravel Pore Space Available for Biofiltration (Above Underdrain)0.40 0.40 0.40 0.40 0.40 0.40 0.40 0.40 0.40 0.40 unitless 37 Effective Depth of Biofiltration Storage 16.60 16.60 12.60 16.60 12.60 22.60 22.60 22.60 22.60 12.60 inches 38 Drawdown Time for Surface Ponding 2 2 1 2 1 3 3 3 3 1 hours 39 Drawdown Time for Effective Biofiltration Depth 3 3 3 3 3 5 5 5 5 3 hours 40 Total Depth Biofiltered 46.60 46.60 42.60 46.60 42.60 52.60 52.60 52.60 52.60 42.60 inches 41 Option 1 - Biofilter 1.50 DCV: Target Volume 270 217 307 390 444 32 185 22 61 822 cubic-feet 42 Option 1 - Provided Biofiltration Volume 270 217 307 390 444 32 185 22 61 822 cubic-feet 43 Option 2 - Store 0.75 DCV: Target Volume 135 108 154 195 222 16 93 11 30 411 cubic-feet 44 Option 2 - Provided Storage Volume 135 108 154 195 222 16 93 11 30 411 cubic-feet 45 Portion of Biofiltration Performance Standard Satisfied 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 ratio 46 Do Site Design Elements and BMPs Satisfy Annual Retention Requirements?Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes yes/no 47 Overall Portion of Performance Standard Satisfied (BMP Efficacy Factor)1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 ratio 48 Deficit of Effectively Treated Stormwater 0 0 0 0 0 0 0 0 0 0 cubic-feet Retention Calculations Automated Worksheet B.3: BMP Performance (V2.0) False False BMP Inputs Biofiltration Calculations False False False False Result False False No Warning Messages Category # Description i x Units 1 Drainage Basin ID or Name 11 12 sq-ft 2 Design Infiltration Rate Recommended 0.000 0.000 in/hr 3 Design Capture Volume Tributary to BMP 141 380 cubic-feet 4 Is BMP Vegetated or Unvegetated? Vegetated Vegetated unitless 5 Is BMP Impermeably Lined or Unlined? Lined Lined unitless 6 Does BMP Have an Underdrain? Underdrain Underdrain unitless 7 Does BMP Utilize Standard or Specialized Media? Standard Standard unitless 8 Provided Surface Area 139 271 sq-ft 9 Provided Surface Ponding Depth 9 9 inches 10 Provided Soil Media Thickness 21 21 inches 11 Provided Gravel Thickness (Total Thickness) 9 9 inches 12 Underdrain Offset 3 3 inches 13 Diameter of Underdrain or Hydromod Orifice (Select Smallest) 6.00 6.00 inches 14 Specialized Soil Media Filtration Rate in/hr 15 Specialized Soil Media Pore Space for Retention unitless 16 Specialized Soil Media Pore Space for Biofiltration unitless 17 Specialized Gravel Media Pore Space unitless 18 Volume Infiltrated Over 6 Hour Storm 0 0 cubic-feet 19 Ponding Pore Space Available for Retention 0.00 0.00 unitless 20 Soil Media Pore Space Available for Retention 0.05 0.05 unitless 21 Gravel Pore Space Available for Retention (Above Underdrain) 0.00 0.00 unitless 22 Gravel Pore Space Available for Retention (Below Underdrain) 0.40 0.40 unitless 23 Effective Retention Depth 2.25 2.25 inches 24 Fraction of DCV Retained (Independent of Drawdown Time) 0.18 0.13 ratio 25 Calculated Retention Storage Drawdown Time 120 120 hours 26 Efficacy of Retention Processes 0.20 0.15 ratio 27 Volume Retained by BMP (Considering Drawdown Time) 28 57 cubic-feet 28 Design Capture Volume Remaining for Biofiltration 113 323 cubic-feet 29 Max Hydromod Flow Rate through Underdrain 1.5678 1.5678 cfs 30 Max Soil Filtration Rate Allowed by Underdrain Orifice 487.26 249.92 in/hr 31 Soil Media Filtration Rate per Specifications 5.00 5.00 in/hr 32 Soil Media Filtration Rate to be used for Sizing 5.00 5.00 in/hr 33 Depth Biofiltered Over 6 Hour Storm 30.00 30.00 inches 34 Ponding Pore Space Available for Biofiltration 1.00 1.00 unitless 35 Soil Media Pore Space Available for Biofiltration 0.20 0.20 unitless 36 Gravel Pore Space Available for Biofiltration (Above Underdrain) 0.40 0.40 unitless 37 Effective Depth of Biofiltration Storage 15.60 15.60 inches 38 Drawdown Time for Surface Ponding 2 2 hours 39 Drawdown Time for Effective Biofiltration Depth 3 3 hours 40 Total Depth Biofiltered 45.60 45.60 inches 41 Option 1 - Biofilter 1.50 DCV: Target Volume 169 484 cubic-feet 42 Option 1 - Provided Biofiltration Volume 169 484 cubic-feet 43 Option 2 - Store 0.75 DCV: Target Volume 84 242 cubic-feet 44 Option 2 - Provided Storage Volume 84 242 cubic-feet 45 Portion of Biofiltration Performance Standard Satisfied 1.00 1.00 ratio 46 Do Site Design Elements and BMPs Satisfy Annual Retention Requirements? Yes Yes yes/no 47 Overall Portion of Performance Standard Satisfied (BMP Efficacy Factor) 1.00 1.00 ratio 48 Deficit of Effectively Treated Stormwater 0 0 cubic-feet Biofiltration Calculations False False -Vegetated BMPs with surface ponding drawdown times over 24 hours must be certified by a landscape architect or agronomist. All BMPs must have a surface False Result False False Attention! Retention Calculations Automated Worksheet B.3: BMP Performance (V2.0) False False BMP Inputs Category # Description i ii iii viii ix Units 1 Drainage Basin ID or Name 13 14 15 14-1 EQ-1 unitless 2 85th Percentile 24-hr Storm Depth 0.60 0.60 0.60 0.60 0.60 inches 3 Is Hydromodification Control Applicable? No No No No No yes/no 4 Impervious Surfaces Not Directed to Dispersion Area (C=0.90) 1,076 4,799 276 2,595 3,180 sq-ft 5 Semi-Pervious Surfaces Not Serving as Dispersion Area (C=0.30) 155 2,630 209 sq-ft 6 Engineered Pervious Surfaces Not Serving as Dispersion Area (C=0.10) sq-ft 7 Natural Type A Soil Not Serving as Dispersion Area (C=0.10) sq-ft 8 Natural Type B Soil Not Serving as Dispersion Area (C=0.14) sq-ft 9 Natural Type C Soil Not Serving as Dispersion Area (C=0.23) sq-ft 10 Natural Type D Soil Not Serving as Dispersion Area (C=0.30) sq-ft 11 Does Tributary Incorporate Dispersion and/or Rain Barrels? No No No yes/no 12 Does Tributary Incorporate Tree Wells? Yes Yes Yes yes/no 13 Impervious Surfaces Directed to Dispersion Area per SD-B (Ci=0.90) sq-ft 14 Semi-Pervious Surfaces Serving as Dispersion Area per SD-B (Ci=0.30) sq-ft 15 Engineered Pervious Surfaces Serving as Dispersion Area per SD-B (Ci=0.10) sq-ft 16 Natural Type A Soil Serving as Dispersion Area per SD-B (Ci=0.10) sq-ft 17 Natural Type B Soil Serving as Dispersion Area per SD-B (Ci=0.14) sq-ft 18 Natural Type C Soil Serving as Dispersion Area per SD-B (Ci=0.23) sq-ft 19 Natural Type D Soil Serving as Dispersion Area per SD-B (Ci=0.30) sq-ft 20 Number of Rain Barrels Proposed per SD-E # 21 Average Rain Barrel Size gal 22 Total Tributary Area 1,231 7,429 276 2,804 3,180 sq-ft 23 Initial Runoff Factor for Standard Drainage Areas 0.82 0.69 0.90 0.86 0.90 unitless 24 Initial Runoff Factor for Dispersed & Dispersion Areas 0.00 0.00 0.00 0.00 0.00 unitless 25 Initial Weighted Runoff Factor 0.82 0.69 0.90 0.86 0.90 unitless 26 Initial Design Capture Volume 50 256 12 121 143 cubic-feet 27 Total Impervious Area Dispersed to Pervious Surface 0 0 0 0 0 sq-ft 28 Total Pervious Dispersion Area 0 0 0 0 0 sq-ft 29 Ratio of Dispersed Impervious Area to Pervious Dispersion Area for DCV Reduction n/a n/a n/a n/a n/a ratio 30 Adjustment Factor for Dispersed & Dispersion Areas 1.00 1.00 1.00 1.00 1.00 ratio 31 Runoff Factor After Dispersion Techniques 0.82 0.69 0.90 0.86 0.90 unitless 32 Design Capture Volume After Dispersion Techniques 50 256 12 121 143 cubic-feet 33 Total Rain Barrel Volume Reduction 0 0 0 0 0 cubic-feet 34 Final Adjusted Runoff Factor 0.82 0.69 0.90 0.86 0.90 unitless 35 Final Effective Tributary Area 1,009 5,126 248 2,411 2,862 sq-ft 36 Initial Design Capture Volume Retained by Dispersion Area and Rain Barrel(s) 0 0 0 0 0 cubic-feet 37 Remaining Design Capture Volume Tributary to Tree Well(s) 50 256 12 121 143 cubic-feet False False SSD-BMP Automated Worksheet I-1: Step 1. Calculation of Design Capture Volume (V1.0) Standard Drainage Basin Inputs Results No Warning Messages Dispersion Area Adjustment & Rain Barrel Adjustment SSD-BMPs Proposed Dispersion Area & Rain Barrel Inputs (Optional) Initial Runoff Factor Calculation False Category # Description i ii Units 1 Drainage Basin ID or Name 13 14 unitless 2 Design Capture Volume Tributary to BMP 50 256 cubic-feet 3 Is Hydromodification Control Applicable? No No yes/no 4 Predominant NRCS Soil Type Within Tree Well(s) Location D unitless 5 Select a Tree Species for the Tree Well(s) Consistent with SD-A Tree Palette Table Note: Numbers shown in list are Tree Species Mature Canopy Diameters 10' - California Mountain Lilac 25' - Other unitless 6 Tree Well(s) Soil Depth (Installation Depth) Must be 30, 36, 42, or 48 Inches; Select from Standard Depths**42 48 inches 7 Number of Identical* Tree Wells Proposed for this DMA 1 1 trees 8 Proposed Width of Tree Well(s) Soil Installation for One (1) Tree 4.5 10.0 feet 9 Proposed Length of Tree Well(s) Soil Installation for One (1) Tree 10.0 26.0 feet 10 Botanical Name of Tree Species Ceanothus 'Ray Hartman' Provide in PDP SWQMP unitless 11 Tree Species Mature Height per SD-A 30 Provide in PDP SWQMP feet 12 Tree Species Mature Canopy Diameter per SD-A 10 25 feet 13 Minimum Soil Volume Required In Tree Well (2 Cubic Feet Per Square Foot of Mature Tree Canopy Projection Area)157 982 cubic-feet 14 Credit Volume Per Tree 40 290 cubic-feet 15 DCV Multiplier To Meet Flow Control Requirements n/a n/a unitless 16 Required Retention Volume (RRV) To Meet Flow Control Requirements n/a n/a cubic-feet 17 Number of Trees Required 2 1 trees 18 Total Area of Tree Well Soil Required for Each Tree 45 245 sq-ft 19 Approximate Required Width of Tree Well Soil Area for Each Tree 7 16 feet 20 Approximate Required Length of Tree Well Soil Area for Each Tree 7 16 feet 21 Number of Trees Proposed for this DMA 1 1 trees 22 Total Area of Tree Well Soil Proposed for Each Tree 45 260 sq-ft 23 Minimum Spacing Between Multiple Trees To Meet Soil Area Requirements (when applicable)***10.0 n/a feet 24 Are Tree Well Soil Installation Requirements Met? Yes Yes yes/no 25 Is Remaining DCV Requirement Fully Satisfied by Tree Well(s)?No Yes yes/no 26 Is Hydromodification Control Requirement Satisfied by Tree Well(s)? n/a n/a yes/no Notes: *If using more than one mature canopy diameter within the same DMA, only the smallest mature canopy diameter should be entered. Alternatively, if more than one mature canopy diameter is proposed and/or the dimensions of multiple tree well installations will vary, separate DMAs may be delineated. **If the actual proposed installation depth is not available in the table of standard depths, select the next lower depth. ***Tree Canopy or Agency Requirements May Also Influence the Minimum Spacing of Trees. Standard Tree Well Inputs Attention! Tree Data Tree Well Sizing Calculations Results -[Line 21] The number of trees proposed do not provide enough credit volume to meet the requirement (i.e., to satisfy the DCV or RRV as applicable). Increase the number of trees or -[Line 22] The length and width dimensions proposed for the tree well(s) in Lines 8 and 9 do not provide enough area to meet the tree well soil volume requirement (Line 13) at the False False SSD-BMP Automated Worksheet I-3: Step 3. Tree Well Sizing (V1.0) False -[Line 12] Applicant to provide supporting documentation for tree species in PDP SWQMP. Category # Description i ii Units 1 Drainage Basin ID or Name 13 14 unitless 2 Design Capture Volume Tributary to BMP 50 256 cubic-feet 3 Is Hydromodification Control Applicable? No No yes/no 4 Predominant NRCS Soil Type Within Tree Well(s) Location D unitless 5 Select a Tree Species for the Tree Well(s) Consistent with SD-A Tree Palette Table Note: Numbers shown in list are Tree Species Mature Canopy Diameters 10' - California Mountain Lilac 25' - Western Redbud unitless 6 Tree Well(s) Soil Depth (Installation Depth) Must be 30, 36, 42, or 48 Inches; Select from Standard Depths**42 48 inches 7 Number of Identical* Tree Wells Proposed for this DMA 1 1 trees 8 Proposed Width of Tree Well(s) Soil Installation for One (1) Tree 4.5 10.0 feet 9 Proposed Length of Tree Well(s) Soil Installation for One (1) Tree 10.0 26.0 feet 10 Botanical Name of Tree Species Ceanothus 'Ray Hartman'Cercis Occidentalis unitless 11 Tree Species Mature Height per SD-A 30 25 feet 12 Tree Species Mature Canopy Diameter per SD-A 10 25 feet 13 Minimum Soil Volume Required In Tree Well (2 Cubic Feet Per Square Foot of Mature Tree Canopy Projection Area)157 982 cubic-feet 14 Credit Volume Per Tree 40 290 cubic-feet 15 DCV Multiplier To Meet Flow Control Requirements n/a n/a unitless 16 Required Retention Volume (RRV) To Meet Flow Control Requirements n/a n/a cubic-feet 17 Number of Trees Required 2 1 trees 18 Total Area of Tree Well Soil Required for Each Tree 45 245 sq-ft 19 Approximate Required Width of Tree Well Soil Area for Each Tree 7 16 feet 20 Approximate Required Length of Tree Well Soil Area for Each Tree 7 16 feet 21 Number of Trees Proposed for this DMA 1 1 trees 22 Total Area of Tree Well Soil Proposed for Each Tree 45 260 sq-ft 23 Minimum Spacing Between Multiple Trees To Meet Soil Area Requirements (when applicable)***10.0 n/a feet 24 Are Tree Well Soil Installation Requirements Met? Yes Yes yes/no 25 Is Remaining DCV Requirement Fully Satisfied by Tree Well(s)?No Yes yes/no 26 Is Hydromodification Control Requirement Satisfied by Tree Well(s)? n/a n/a yes/no Notes: *If using more than one mature canopy diameter within the same DMA, only the smallest mature canopy diameter should be entered. Alternatively, if more than one mature canopy diameter is proposed and/or the dimensions of multiple tree well installations will vary, separate DMAs may be delineated. **If the actual proposed installation depth is not available in the table of standard depths, select the next lower depth. ***Tree Canopy or Agency Requirements May Also Influence the Minimum Spacing of Trees. -[Line 21] The number of trees proposed do not provide enough credit volume to meet the requirement (i.e., to satisfy the DCV or RRV as applicable). Increase the number of trees or -[Line 22] The length and width dimensions proposed for the tree well(s) in Lines 8 and 9 do not provide enough area to meet the tree well soil volume requirement (Line 13) at the False False SSD-BMP Automated Worksheet I-3: Step 3. Tree Well Sizing (V1.0) False False Standard Tree Well Inputs Attention! Tree Data Tree Well Sizing Calculations Results iple tree well installations will vary, separate DMAs may b 1.F) Trash Capture BMP Design Calculations Q = CIA *Rational Method Equation I = 0.471 in/hr *BMP design manual rainfall intensity for 1-hr 1-yr storm Total Site Area Calcs Total Area = 84,914 sf  1.95 Acres Impervious Area = 70,790 sf  1.63 Ac Pervious Area = 14,124 sf  0.32 Ac Cn, Weighted Runoff Coefficient, - 0.35, Cn value for natural ground, Type D Soils *Per San Diego County Hydrology Manual (SDCHM) Section 3.1.2 - 0.90, Cn value for developed/impervious surface *Per SDCHM Section 3.1.2 Cn = 0.9 x 70,790 sf + 0.35 x 14,124 sf = 0.81 84,914 sf ATTACHMENT 2 BACKUP FOR PDP HYDROMODIFICATION CONTROL MEASURES [This is the cover sheet for Attachment 2.] Indicate which Items are Included behind this cover sheet: Attachment Sequence Contents Checklist Attachment 2a Hydromodification Management Exhibit (Required) Included Attachment 2b Management of Critical Coarse Sediment Yield Areas (WMAA Exhibit is required, additional analyses are optional) See Section 6.2 of the BMP Design Manual. Exhibit showing project drainage boundaries marked on WMAA Critical Coarse Sediment Yield Area Map (Required) Optional analyses for Critical Coarse Sediment Yield Area Determination 6.2.1 Verification of Geomorphic Landscape Units Onsite 6.2.2 Downstream Systems Sensitivity to Coarse Sediment 6.2.3 Optional Additional Analysis of Potential Critical Coarse Sediment Yield Areas Onsite Attachment 2c Geomorphic Assessment of Receiving Channels (Optional) See Section 6.3.4 of the BMP Design Manual. Not performed Included Attachment 2d Flow Control Facility Design and Structural BMP Drawdown Calculations (Required) See Chapter 6 and Appendix G of the BMP Design Manual Included Use this checklist to ensure the required information has been included on the Hydromodification Management Exhibit: The Hydromodification Management Exhibit must identify: Underlying hydrologic soil group Approximate depth to groundwater Existing natural hydrologic features ( watercourses, seeps, springs, wetlands) Critical coarse sediment yield areas to be protected (if present) Existing topography Existing and proposed site drainage network and connections to drainage offsite Proposed grading Proposed impervious features Proposed design features and surface treatments used to minimize imperviousness Point(s) of Compliance (POC) for Hydromodification Management Existing and proposed drainage boundary and drainage area to each POC (when necessary, create separate exhibits for pre-development and post-project conditions) Structural BMPs for hydromodification management (identify location, type of BMP, and size/detail) Drawdown Calculation for BMP-1 Project Name Project No 3802 Surface Drawdown Time: 2.0 hr Surface Area 268 sq ft Underdrain Orifice Diameter: in 6 in C:0.6 Surface Ponding (to invert of lowest surface discharge opening in outlet structure): 0.83 ft Amended Soil Depth: 1.75 ft Gravel Depth: 0.75 ft Orifice Q = 1.658 cfs Effective Depth 17.76 in Infiltration controlled by orifice 267.318 in/hr Infiltration controlled by media 5.000 in/hr Hope Ave Apartments Drawdown Calculation for BMP-2 Project Name Project No 3802 Surface Drawdown Time: 2.0 hr Surface Area 317 sq ft Underdrain Orifice Diameter: in 6 in C:0.6 Surface Ponding (to invert of lowest surface discharge opening in outlet structure): 0.83 ft Amended Soil Depth: 1.75 ft Gravel Depth: 0.75 ft Orifice Q = 1.658 cfs Effective Depth 17.76 in Infiltration controlled by orifice 225.998 in/hr Infiltration controlled by media 5.000 in/hr Hope Ave Apartments Drawdown Calculation for BMP-3 Project Name Project No 3802 Surface Drawdown Time: 0.0 hr Surface Area 235 sq ft Underdrain Orifice Diameter: in 6 in C:0.6 Surface Ponding (to invert of lowest surface discharge opening in outlet structure): 0.5 ft Amended Soil Depth: 1.75 ft Gravel Depth: 0.75 ft Orifice Q = 1.567 cfs Effective Depth 13.8 in Infiltration controlled by orifice 288.062 in/hr Infiltration controlled by media 5.000 in/hr Hope Ave Apartments Drawdown Calculation for BMP-4 Project Name Project No 3802 Surface Drawdown Time: 2.0 hr Surface Area 443 sq ft Underdrain Orifice Diameter: in 6 in C:0.6 Surface Ponding (to invert of lowest surface discharge opening in outlet structure): 0.83 ft Amended Soil Depth: 1.75 ft Gravel Depth: 0.75 ft Orifice Q = 1.658 cfs Effective Depth 17.76 in Infiltration controlled by orifice 161.718 in/hr Infiltration controlled by media 5.000 in/hr Hope Ave Apartments Drawdown Calculation for BMP-5 Project Name Project No 3802 Surface Drawdown Time: 1.2 hr Surface Area 264 sq ft Underdrain Orifice Diameter: in 6 in C:0.6 Surface Ponding (to invert of lowest surface discharge opening in outlet structure): 0.5 ft Amended Soil Depth: 1.75 ft Gravel Depth: 0.75 ft Orifice Q = 1.567 cfs Effective Depth 13.8 in Infiltration controlled by orifice 256.419 in/hr Infiltration controlled by media 5.000 in/hr Hope Ave Apartments Drawdown Calculation for BMP-6 Project Name Project No 3802 Surface Drawdown Time: 3.2 hr Surface Area 164 sq ft Underdrain Orifice Diameter: in 6 in C:0.6 Surface Ponding (to invert of lowest surface discharge opening in outlet structure): 1.33 ft Amended Soil Depth: 1.75 ft Gravel Depth: 0.75 ft Orifice Q = 1.788 cfs Effective Depth 23.76 in Infiltration controlled by orifice 470.961 in/hr Infiltration controlled by media 5.000 in/hr Hope Ave Apartments Drawdown Calculation for BMP-7 Project Name Project No 3802 Surface Drawdown Time: 3.2 hr Surface Area 615 sq ft Underdrain Orifice Diameter: in 6 in C:0.6 Surface Ponding (to invert of lowest surface discharge opening in outlet structure): 1.33 ft Amended Soil Depth: 1.75 ft Gravel Depth: 0.75 ft Orifice Q = 1.788 cfs Effective Depth 23.76 in Infiltration controlled by orifice 125.590 in/hr Infiltration controlled by media 5.000 in/hr Hope Ave Apartments Drawdown Calculation for BMP-8 Project Name Project No 3802 Surface Drawdown Time: 3.2 hr Surface Area 400 sq ft Underdrain Orifice Diameter: in 6 in C:0.6 Surface Ponding (to invert of lowest surface discharge opening in outlet structure): 1.33 ft Amended Soil Depth: 1.75 ft Gravel Depth: 0.75 ft Orifice Q = 1.788 cfs Effective Depth 23.76 in Infiltration controlled by orifice 193.094 in/hr Infiltration controlled by media 5.000 in/hr Hope Ave Apartments Drawdown Calculation for BMP-9 Project Name Project No 3802 Surface Drawdown Time: 3.2 hr Surface Area 253 sq ft Underdrain Orifice Diameter: in 6 in C:0.6 Surface Ponding (to invert of lowest surface discharge opening in outlet structure): 1.33 ft Amended Soil Depth: 1.75 ft Gravel Depth: 0.75 ft Orifice Q = 1.788 cfs Effective Depth 23.76 in Infiltration controlled by orifice 305.287 in/hr Infiltration controlled by media 5.000 in/hr Hope Ave Apartments Drawdown Calculation for BMP-10 Project Name Project No 3802 Surface Drawdown Time: 1.2 hr Surface Area 555 sq ft Underdrain Orifice Diameter: in 6 in C:0.6 Surface Ponding (to invert of lowest surface discharge opening in outlet structure): 0.5 ft Amended Soil Depth: 1.75 ft Gravel Depth: 0.75 ft Orifice Q = 1.567 cfs Effective Depth 13.8 in Infiltration controlled by orifice 121.972 in/hr Infiltration controlled by media 5.000 in/hr Hope Ave Apartments Drawdown Calculation for BMP-11 Project Name Project No 3802 Surface Drawdown Time: 1.8 hr Surface Area 139 sq ft Underdrain Orifice Diameter: in 6 in C:0.6 Surface Ponding (to invert of lowest surface discharge opening in outlet structure): 0.75 ft Amended Soil Depth: 1.75 ft Gravel Depth: 0.75 ft Orifice Q = 1.637 cfs Effective Depth 16.8 in Infiltration controlled by orifice 508.667 in/hr Infiltration controlled by media 5.000 in/hr Hope Ave Apartments Drawdown Calculation for BMP-12 Project Name Project No 3802 Surface Drawdown Time: 1.8 hr Surface Area 271 sq ft Underdrain Orifice Diameter: in 6 in C:0.6 Surface Ponding (to invert of lowest surface discharge opening in outlet structure): 0.75 ft Amended Soil Depth: 1.75 ft Gravel Depth: 0.75 ft Orifice Q = 1.637 cfs Effective Depth 16.8 in Infiltration controlled by orifice 260.903 in/hr Infiltration controlled by media 5.000 in/hr Hope Ave Apartments ATTACHMENT 3 Structural BMP Maintenance Information Use this checklist to ensure the required information has been included in the Structural BMP Maintenance Information Attachment: Preliminary Design/Planning/CEQA level submittal: Attachment 3 must identify: √ Typical maintenance indicators and actions for proposed structural BMP(s) based on Section 7.7 of the BMP Design Manual Final Design level submittal: Attachment 3 must identify: √ Specific maintenance indicators and actions for proposed structural BMP(s). This shall be based on Section 7.7 of the BMP Design Manual and enhanced to reflect actual proposed components of the structural BMP(s) √ How to access the structural BMP(s) to inspect and perform maintenance √ Features that are provided to facilitate inspection (e.g., observation ports, cleanouts, silt posts, or other features that allow the inspector to view necessary components of the structural BMP and compare to maintenance thresholds) Manufacturer and part number for proprietary parts of structural BMP(s) when applicable Maintenance thresholds for BMPs subject to siltation or heavy trash(e.g., silt level posts or other markings shall be included in all BMP components that will trap and store sediment, trash, and/or debris, so that the inspector may determine how full the BMP is, and the maintenance personnel may determine where the bottom of the BMP is . If required, posts or other markings shall be indicated and described on structural BMP plans.) √ Recommended equipment to perform maintenance When applicable, necessary special training or certification requirements for inspection and maintenance personnel such as confined space entry or hazardous waste management SD-A Tree Wells www.sandiegocounty.gov/stormwater E-13 Effective September 15, 2020 Summary of Standard Inspection and Maintenance The property owner is responsible to ensure inspection, operation and maintenance of permanent BMPs on their property unless responsibility has been formally transferred to an agency, community facilities district, homeowners association, property owners association, or other special district. Maintenance frequencies listed in this table are average/typical frequencies. Actual maintenance needs are site-specific, and maintenance may be required more frequently. Maintenance must be performed whenever needed, based on maintenance indicators presented in this table. The BMP owner is responsible for conducting regular inspections to see when maintenance is needed based on the maintenance indicators. During the first year of operation of a structural BMP, inspection is recommended at least once prior to August 31 and then monthly from September through May. Inspection during a storm event is also recommended. After the initial period of frequent inspections, the minimum inspection and maintenance frequency can be determined based on the results of the first year inspections. Threshold/Indicator Maintenance Action Inspection and Maintenance Frequency Tree health Routine actions as necessary to maintain tree health. • Inspect monthly. • Maintain when needed. Dead or diseased tree Remove dead or diseased tree. Replace per original plans. • Inspect monthly. • Maintain when needed. Standing water in tree well for longer than 24 hours following a storm event Surface ponding longer than approximately 24 hours following a storm event may be detrimental to tree health Loosen or replace soils surrounding the tree to restore drainage. • Inspect monthly and after every 0.5-inch or larger storm event. If standing water is observed, increase inspection frequency to after every 0.1-inch or larger storm event. • Maintain when needed. Presence of mosquitos/larvae For images of egg rafts, larva, pupa, and adult mosquitos, see http://www.mosquito.org/biology Disperse any standing water from the tree well to nearby landscaping. Loosen or replace soils surrounding the tree to restore drainage (and prevent standing water). • Inspect monthly and after every 0.5-inch or larger storm event. If mosquitos are observed, increase inspection frequency to after every 0.1-inch or larger storm event. • Maintain when needed SD-A Tree Wells www.sandiegocounty.gov/stormwater E-14 Effective September 15, 2020 Threshold/Indicator Maintenance Action Inspection and Maintenance Frequency Entrance / opening to the tree well is blocked such that storm water will not drain into the tree well (e.g., a curb inlet opening is blocked by debris or a grate is clogged causing runoff to flow around instead of into the tree well; or a surface depression is filled such that runoff drains away from the tree well) Make repairs as appropriate to restore drainage into the tree well. • Inspect monthly. • Maintain when needed. 35 | P a g e • Pooling of water in the MB can also be indicative of hydrocarbon loading from stormwater runoff. Add MYCELX to remove hydrocarbons from stormwater to rectify the problem; • Visually inspect the MB to determine if the filter media has any holes greater than 5mm in size. Replace MB if necessary; • Visually inspect the Device to check if any significant gaps exist between the UGF and the inlet’s grate shelf; • Visually inspect the filter hanger for accumulated debris. Excessive accumulation of debris on the filter hanger or particularly the progressive trash screen may indicate a full MB that needs emptying or replacing; • Visually inspect the diverter screen or inlet screen (if present). If either are covered with debris, then they should be wiped off to ensure proper filtration for future storm events; • Inspect the DIF frame to make sure all components look or feel secure; • Inspect after first rain event greater than ¼”; • Inspect after every storm of ½” or greater; • Inspect every one (1) to two (2) months during the first year than at least quarterly thereafter; and • See 5.C. for more information. 5.B. Maintenance frequency consideration, procedures, and a description of necessary equipment and materials. The Device may be serviced in one of two simple ways through manual maintenance or vac truck maintenance as described below: Manual Maintenance: To service the Device manually within three (3) to seven (7) minutes, follow these steps: Equipment needed for manual maintenance: PPE, safety equipment, grate puller, broom, weight scale, FCP Field App mobile device, replacement media, disposal receptacle (trash bag, dumpster, trailer, etc.). 1. Deploy safety equipment: place cones around area and make sure it is safe to remove storm grate. Wear personal protective equipment (PPE). No confined space entry is required. The Engineer will make the final determination of necessary safety equipment, processes, and permits. All maintenance personnel may be above the catch basin during maintenance of the Device; 2. Remove covering: Use grate puller or another tool to remove the inlet to expose the Device; 36 | P a g e 3. Stuff MB: Push overflowing pollutions (if any) into the MB with hand tool or spray wand. Be sure to inspect the trash screen around filter hanger and remove any debris that may have blocked the screen; 4. Remove & record: Remove MB by lifting handle or hoop. Weigh the MB with a common crane scale (FCP can provide if necessary). Record weight of MB and any other pollution data such as density, pollutant type, etc. Dispose of pollutants properly and in accordance with local laws; 5. Dump and dispose: The MB has the unique capability of being reused or replaced. To dump, remove fastener at the bottom of the MB. Dump contents into approved receptacle. Alternatively, one can dispose of the whole MB if the filtration media is compromised. Dispose of filter media and captured pollutants in accordance with local regulations or as directed by the Engineer; 6. Replace MB & cover: Close the bottom of the MB with a zip tie or wire, replace the bag into the receiver on the Device’s filter hanger, and replace the grate. It is important to note that this method is the most efficient way to perform maintenance on a low volume of Gutter Bins and in space restricted areas. Service can be done in conjunction with a service hand cart, 4-wheeler with trailer/bed, or a pickup truck. A low height trailer can also be useful. Vac truck maintenance: To service the Device with a vac truck within four (4) to twelve (12) minutes, follow these steps: Equipment needed for vac truck maintenance: PPE, safety equipment, vacuum truck, cover removal tool, weight scale, FCP Field App mobile device, replacement media, disposal receptacle (vac truck vessel), and replacement media. Prepare vac truck: deploy safety equipment (cones, lights, etc.) and vac truck for operation (turn on pumps, adjust valves, deploy boom, etc.). The Engineer will make the final determination of necessary safety equipment, processes, and permits. No confined space entry is required. All maintenance activities can take place with personnel above the catch basin. 1. Remove covering: Use hook or another tool to remove the drop inlet cover to expose the Device; 2. Stuff MB (optional): Push overflowing pollutions (if any) into the MB with hand tool or spray wand. Be sure to inspect the trash screen around filter hanger and remove any debris that may have blocked the screen; 3. Record (optional): Lift MB by pulling up the handle or hoop. Weigh the bag with a common crane scale. Record weight of MB plus any other pollution data such as density, pollutant type, etc.; 37 | P a g e 4. Evacuate MB: Vacuum contents out of MB. The bag may be sucked inside out so one may have to push the bag right side out and realign the MB. Be careful that the MB is not sucked into the vacuum. One may need to secure the MB to the MH to prevent loss of flexible filter media. A vac truck crew can evacuate the contents of an MB with proper instruction by FCP and minor alterations to the standard MB; 7. Replace MB & cover: replace the MB (or reuse existing MB if TTC-MB is used) into the receiver on the Device’s filter hanger, drape handle over the handle hook, and replace the grate; 5. Prepare vac truck for relocation: gather safety equipment, turn off pumps, close valves, deploy boom, etc. It is important to note that the use of a vac truck can be highly inefficient due to its maintenance requirements, truck purchase costs, and the fact that it requires the waste removed by a vac truck to be handled at least three (3) times before it reaches the landfill (suck, decant, load, haul, dump). It may also take a few minutes longer to service a Gutter Bin with a vac truck rather than doing it manually because of the set-up/take- down time required to operate a vac truck. As with any manufactured device, there may be product limits that need acceptance or correction. At times, it may be prudent to relocate or modify the Device or move to another location as polluting behaviors and infrastructure changes. Each Device installation is unique based on location conditions and targeted pollutants. • The inspection frequency mainly depends upon climate events and pollutant load. o Inspect after the first and second rain event to ensure proper function (break-in period); o For construction sites, one should inspect the Device after each storm event greater than ½” of precipitation or heavy snow melt; and o For post construction and permanent installations, one should inspect the Device three (3) to four (4) times per year or as directed by the Engineer. Maintenance frequency considerations include: • Typical pollutant load: areas with bulky trash and debris may require more frequent service intervals to ensure that pollutants don’t bypass the MB via the Device’s adjustable overflow; • Local climate conditions: areas with heavy rainfall or snowfall may require a more frequent maintenance cycle if pollutant load is high. During the autumn leaf 38 | P a g e fall, more frequent maintenance may be required. High rainfall does not always equate to more frequent service visits; • Infrastructure constraints: drop inlets with large drainage areas and high pollutant loads may require more frequent service intervals. Smaller drop inlets may require smaller diameter MBs thereby decreasing the pollutant capacity and shortening the service interval; • Type of MB being used: Total Trash Capture (TTC-MB) model MBs typically have a longer service life than the Trash Debris & Sediment (TDS-MB) model MB because the TTC-MB allows anything smaller than 5mm to pass the filtration system. The VAC-MB can last for several years. Replace or empty a MB if it is more than 75% full or if MB water filter has blinded and as directed by the Engineer. It is important that the Device be maintained to ensure proper function, minimize any pollution bypass and mitigate flooding risks during extreme weather events. The Engineer may prescribe an alternative means of maintenance per local regulations, site requirements, and/or contract requirement. Captured pollutants and spent media must be disposed of in accordance with all Federal, State, and Local Laws and Regulations. 5.C. Effects of delayed maintenance on Device structural integrity, performance, odors. Delayed maintenance may cause the MB to become completely full of material thereby causing stormwater to bypass the filter system and the Device not performing as designed. It is unlikely that a completely full MB will affect the structural integrity of the Device because of its solid frame suspension system and configuration. The MB will drain between rainstorms but there may be trash within the bag that holds water and causes odors. Performance and odor problems can be solved by more frequent servicing of the Device. Maintenance Troubleshooting: • Pooling of water inside of a MB is most likely indicative of: o A full MB that needs emptying or replacement; o A TDS-MB model with a sediment capture liner with too fine of filter is clogging due to hydrocarbon loading. A coarser filter material can be substituted or MYCELX can be added to the filter chain to remove hydrocarbons before they foul the sediment liner. A sediment liner is not required for full trash capture. • Pooling of water below the Device can be caused from the catch basin sump or irregularities in the catch basin construction; ATTACHMENT 4 City standard Single Sheet BMP (SSBMP) Exhibit [Use the City’s standard Single Sheet BMP Plan.] 9"TP9"TP 9"TP9"TP 7"TD4"TD 8"TD(4) 8"TD (4) 10"TD 12"TD 14 " T D 1 0 " T D 1 0 " T D 6"TD 6"TD 16"TC 42"TC 16"TC 15"TC 12"TC 16"TP 16"TP 16"TP 16"TP 11"TD 11"TD 12"TD 11"TD 11"TD 12"TD 11"TP 11"TP X X X X X X X XXXX X X X X X X X X X X X X X X X X OEOEOEOEOEOEOEOEOEOEOEOE OE OEOE OE OE OE OE OE OE OE OE OE OE OE OEOE OE OE OE OE OE OE OE OE OE OE OE OE OE OE OE OE OE OE OE OE OE OE OE OE OE OEOEOEOEOE OEOEOEOEOEOEOE OE OEOE OEOEOE OE OE OEOEOEOEOEOEOEOEOEOEOEOE O E OE OE OE OE OE E G GG G D D D D D D D D SSS S SS EEE E E E E C C E WW W WW WW RAMP WOOD WALL CONC PAD MON. WELL GEO GRIDTRANS PAD MON. WELL EXISTING 1 STORY BUILDING EXISTING MULTI STORY BUILDING EXISTING MULTI STORY BUILDING EXISTING MULTI STORY BUILDING EXISTING MULTI STORY BUILDING EXISTING MULTI STORY BUILDING EXISTING 1 STORY BUILDING EXISTING 1 STORY BUILDING W W W W W W W W W W W W W W W W W W S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S WW W W W W W W W W S S G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G G S S G G G G G GGG G G G G G G G G G G G G G G G G G G G G G G G OE OE OE OE OE OE OE OE OE OE OE OE OE OE OE OE OE OE OE OE OE OE OE OE OE OE OE OE OE E E E E E E SD S S S S S S S SD SD SD SD W W W W W W W W W SD SD SD SD W W W WWWWWW SD W W W W SD SD SD SD W G G G G G G W W W W S WWW WW W W S S S S S S S S S S RAMP WOOD WALL 71 70 70 69 69 69 69 69 69 69 69 68 68 68 68 68 68 68 68 68 67 67 67 67 66 66 66 65 65 65 65 65 65 65 65 65 65 65 65 64 64 64 64 64 64 64 64 64 63 63 63 63 63 63 63 63 63 63 63 63 63 62 62 62 CONCPAD MON. WELL GEO GRIDTRANS PAD MON. WELL 67.10 TC66.65 FL 67.84 TC67.30 FL 67.73 TC67.24 FL 68.49 TC 68.06 FL 68.59 TC 68.09 FL 68.61 TC68.22 FL 69.33 TC68.87 FL 68.98 TC 68.47 FL 68.79 TC68.35 FL 68.97 TC68.58 FL 69.12 TC68.70 FL 68.47 TC68.10 FL 69.16 TC 68.81 FL 69.52 TC69.16 FL 69.08 TC68.56 FL 69.50 TC69.23 FL 69.58 TC69.50 FL 68.30 TC 68.27 FL 68.64 TC68.19 FL 68.44 TC 68.03 FL 68.17 TC 67.74 FL 68.09 TC 67.70 FL 68.67 TC 68.67 FL 68.48 TC 68.43 FL 68.98 TC68.48 FL 69.22 TC68.78 FL 68.09 TC 67.65 FL 69.30 TC 68.84 FL 68.52 TC68.04 FL 68.96 TC68.59 FL 69.30 TC 68.80 FL 69.12 TC 68.70 FL 68.94 TC 68.54 FL 68.58 TC68.16 FL 68.34 TC67.95 FL 68.36 TC 67.93 FL 68.70 TC68.28 FL 68.53 TC 68.08 FL 68.76 TC 68.76 FL 68.75 TC 68.31 FL67.95 TC67.90 FL 67.41 TC 67.31 FL 65.86 TC65.80 FL 65.20 TC64.71 FL63.18 TC 62.73 FL 62.80 TC62.31 FL 63.07 TC63.04 FL 63.29 TC 63.25 FL 67.58 TC 67.08 FL 67.88 TC 67.44 FL 67.89 TC67.51 FL 68.74 TC68.24 FL 67.96 TC67.56 FL 68.45 TC 68.00 FL 62.41 TC61.92 FL 63.04 TC62.59 FL 63.65 TC 63.25 FL 64.83 TC64.38 FL 66.04 TC65.54 FL 66.80 TC66.37 FL 68.05 TC 67.53 FL 70.65 TC70.19 FL 68.93 TC 68.46 FL 67.95 TC67.52 FL66.84 TC 66.32 FL65.03 TC 64.54 FL 63.90 TC 63.37 FL 62.19 TC 61.77 FL 62.08 TC61.62 FL 61.54 TC61.49 FL 61.47 TC61.39 FL 62.04 RIM 66.60 RIM 68.69 RIM 68.87 RIM 68.33 RIM 68.30 RIM 68.29 RIM 64.94 RIM 63.34 IE 66.29 IE62.38 TW 63.21 TW 68.02 TW 68.61 TW 67.60 TW 67.54 TW 70.75 TW 70.77 TW 70.83 TW 70.79 TW 70.79 TW 68.82 TW 65.22 TW 65.33 TW 68.77 TW 68.70 TW 69.70 TW 69.71 TW 69.71 TW 69.75 TW 70.42 TW 70.31 TW 74.23 TW 74.24 TW 69.59 TW 74.36 TW 69.54 TW 69.54 TW 66.06 TC65.77 FL 65.17 TC64.85 FL 65.68 TC65.36 FL 65.11 TC64.64 FL 65.81 TC65.50 FL 67.43 67.68 67.77 67.89 68.00 68.41 68.79 68.32 67.90 67.66 68.54 68.69 68.21 68.63 69.38 69.43 69.55 69.44 69.51 69.39 69.42 69.4969.4669.45 69.41 69.37 69.39 69.38 69.42 69.26 69.29 69.17 69.10 68.76 67.49 68.22 68.18 69.45 61.72 62.05 62.06 62.67 63.46 64.75 65.46 66.60 67.77 69.43 70.32 63.43 63.30 63.2162 . 2 6 62 . 1 9 62.95 61.70 61.51 61.42 61.8062.45 62.69 62 . 6 0 62.15 62.44 62. 5 3 62.30 62.58 62.9362.52 62.63 62.55 63.09 62.84 62.95 63.32 63.00 63.16 62.56 63.13 62.1 63.8 64.4 64.563.862.7 63.3 63.7 64.2 64.763.363.6 63.61 63 . 6 2 68. 3 2 63.73 67. 4 0 63.36 68 . 6 7 63 . 6 3 69.16 64.55 64.80 69.02 65.33 64.35 63.2362.91 62.71 63.36 63.27 64.15 64.47 65.06 64.91 9"TP 9"TP 9"TP 9"TP 7"TD4"TD 8"TD(4) 8"TD (4) 10"TD 12"TD 14" T D 10 " T D 10"TD 6"TD 6"TD 16"TC 42"TC 16"TC 15"TC 12"TC 16"TP 16"TP 16"TP 16"TP 11"TD 11"TD 12"TD 11"TD 11"TD 12"TD 11"TP 11"TP 65 66 67 6 2 69 68 67 XXXXX X XXX XXX X X X X X X X XXXXXX X X X X X X X X X X X X X X X X X X XXXXXX X X X X X X X E E E E E E CARLSBAD VILLAGE DRIVE GRAND AVENUE PCL 1 PM 2868 APN: 203-320-40 PORT. PARCEL A APN: 203-320-52 30 ' 30 ' 60 ' BLOCK 67 MAP 775 PORT. PARCEL A APN: 203-320-50 HO P E A V E N U E BLOCK 67 MAP 775 L=43.20' R=55.00' D=45°00'00" N 11 ° 0 2 ' 0 1 " E 1 3 7 . 5 6 ' N 3 3 ° 5 7 ' 5 9 " W 2 0 9 . 9 4 ' N 56° 00' 18" E 5.00' N 33° 57' 29" E 15.00'N 56°00'18" E 328.77' N 3 3 ° 5 6 ' 4 6 " W 6 1 . 9 0 ' Δ=65.41 L=6.28' R=5.5' L=47.12' R=60.00' D=45°00'00" N 55°58'09" E 35.02' N 56°51'49" E 162.88' N 3 3 ° 5 7 ' 2 9 " E 4 2 6 . 7 5 ' N 33° 58' 05" E 2.98' 1 2 3 5 4 7 8 9 13 15 16 17 18 19 20 21 22 23 24 25 26 34 35 36 37 10 14 LA LA LA LA 28 29 32 31 30 15 27 27 6 11 12 33 38 39 J:\ACTIVE JOBS\3802 WERMERS\CIVIL\REPORTS\SWQMP\_Final\Attachment 4 - Single Sheet BMP PA S C O , L A R E T , S U I T E R & A S S O C I A T E S 19 1 1 S A N D I E G O A V E N U E , S A N D I E G O , C A 9 2 1 1 0 PH : ( 8 5 8 ) 2 5 9 - 8 2 1 2 F A X : ( 8 5 8 ) 2 5 9 - 4 8 1 2 REVIEWED BY: DATEINSPECTOR DATE "AS BUILT" ENGINEERING DEPARTMENT RCE EXP. SDP 2022-0006GR 2023-0044 HOPE APARTMENTS HOPE AVENUE SINGLE SHEET BMP PLAN VIEW - SSBMP EXHIBIT SCALE: 1" = 30' HORIZONTAL (949)-637-3254 RICHARD LEMMEL5315 AVENIDA ENCINAS, SUITE 200 CARLSBAD, CA 92008 CARLSBAD VILLAGE II, LLC PROPERTY BOUNDARY CENTERLINE OF ROAD ADJACENT PROPERTY LINE PUBLIC RIGHT-OF-WAY LEGEND (858) 259-8212 SAN DIEGO, CA 92110 1911 SAN DIEGO AVENUNE PLSA ENGINEERING TYLER LAWSON THE EOW WILL VERIFY THAT PERMANENT BMPS ARE CONSTRUCTED AND OPERATING IN COMPLIANCE WITH THE APPLICABLE REQUIREMENTS. PRIOR TO OCCUPANCY THE EOW MUST PROVIDE: 1.PHOTOGRAPHS OF THE INSTALLATION OF PERMANENT BMPS PRIOR TO CONSTRUCTION, DURING CONSTRUCTION, AND AT FINAL INSTALLATION. 2.A WET STAMPED LETTER VERIFYING THAT PERMANENT BMPS ARE CONSTRUCTED AND OPERATING PER THE REQUIREMENTS OF THE APPROVED PLANS. 3.PHOTOGRAPHS TO VERIFY THAT PERMANENT WATER QUALITY TREATMENT SIGNAGE HAS BEEN INSTALLED. PRIOR TO RELEASE OF SECURITIES, THE DEVELOPER IS RESPONSIBLE FOR ENSURING THE PERMANENT BMPS HAVE NOT BEEN REMOVED OR MODIFIED BY THE NEW HOMEOWNER OR HOA WITHOUT THE APPROVAL OF THE CITY ENGINEER. BMP CONSTRUCTION AND INSPECTION NOTES: SIGNATURE 6.SEE PROJECT SWQMP FOR ADDITIONAL INFORMATION. 5.REFER TO MAINTENANCE AGREEMENT DOCUMENT. COMPANY CERTIFICATION PHONE NO. ADDRESS NAME PLAN PREPARED BY: CONTACT PHONE NO. ADDRESS NAME PARTY RESPONSIBLE FOR MAINTENANCE:BMP NOTES: AND INSTALLATION. HAS INSPECTED THIS PROJECT FOR APPROPRIATE BMP CONSTRUCTION 4.NO OCCUPANCY WILL BE GRANTED UNTIL THE CITY INSPECTION STAFF WITHOUT PRIOR APPROVAL FROM THE CITY ENGINEER. 3.NO SUBSTITUTIONS TO THE MATERIAL OR TYPES OR PLANTING TYPES APPROVAL FROM THE CITY ENGINEER. 2.NO CHANGES TO THE PROPOSED BMPS ON THIS SHEET WITHOUT PRIOR RECOMMENDATIONS AND/OR THESE PLANS. 1.THESE BMPS ARE MANDATORY TO BE INSTALLED PER MANUFACTURER'S 80356 1 LA 3,924 LANDSCAPING SUSTAINABLE ANNUALLY & AS-NEEDED2 EA ______TC-32 SEMI-ANNUALLYTREE WELL SITE DESIGN MONTHLY & AFTER 0.05" RAIN______SF.TC-32 SEMI-ANNUALLYRAISED PLANTER BIOFILTRATION TREATMENT CONTROL QUANTITY FREQUENCY INSPECTION BMP TABLE FREQUENCY MAINTENANCESHEET NO.(S)DRAWING NO.CASQA NO.SYMBOLBMP ID #BMP TYPE 14,915 SF. TO IMPERVIOUSDIRECT RUNOFF AREA 12- 15 18- 19 26- SD-A ______SD-K ______SD-B AS-NEEDEDANNUALLY MONTHLYANNUALLY TRASH CAPTURE BMPS 39- DWG 546-4A SHEETS 3-5 MUNDUS BAG TTC FROG CREEK28 TC-50 12 EA ANNUALLY & AS-NEEDEDSEMI-ANNUALLY PERVIOUS PAVEMENT27 ______SD-D AS-NEEDED350SF.SEMI-ANNUALLY DWG 546-4A SHEETS 3-5 DWG 546-4A SHEETS 3-5 DWG 546-4A SHEETS 3-5 DWG 546-4A SHEETS 3-5 DWG 546-4A SHEETS 3-5 13 15-