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Home My WebLink AboutCUP 2018-0023; BUENA VISTA RESERVOIR SITE (PARK); PRIORITY DEVELOPMENT PROJECT (PDP) STORM WATER QUALITY MANAGEMENT PLAN (SWQMP); 2020-07-01CITY OF CARLSBAD PRIORITY DEVELOPMENT PROJECT (PDP) STORM WATER QUALITY MANAGEMENT PLAN (SWQMP) FOR BUENA VISTA RESERVOIR SITE (PARK) CUP 2018-0023 I GR2019-0040 I DWG 521-lA ENGINEER OF WORK: RECORD COPY Initial Date Nick Psyhogios, PE I RCE 67697 PREPARED FOR: SCHMIDT DESIGN GROUP, INC. 1310 ROSECRANS STREET, SUITE G SAN DIEGO, CA 92106 (619) 236-1462 PREPARED BY: latitudeJ PLANNING & ENGINEERING LATITUDE 33 PLANNING & ENGINEERING 9968 HIBERT STREET SECOND FLOOR SAN DIEGO, CA 92131 (858) 751-0633 DATE: July, 2020 .3 ( CITY OF CARLSBAD PRIORITY DEVELOPMENT PROJECT (PDP) STORM WATER QUALITY MANAGEMENT PLAN (SWQMP) FOR BUENA VISTA RESERVOIR SITE (PARK) CUP 2018-0023 I GR2019-0040 I DWG 521-IA ENGINEER OF WORK: C 5 Z LAND DEVELOPME ENGPNLEING Nick Psyhogios, PE I RCE 67697 " - ~' (/-, .2, , yo I / " "- 1;k11911I.)3 SCHMIDT DESIGN GROUP, INC. 1310 ROSECRANS STREET, SUITE G SAN DIEGO, CA 92106 (619) 236-1462 PREPARED BY: latitude 33] PLANNING & ENGINEERING LATITUDE 33 PLANNING & ENGINEERING 9968 HIBERT STREET SECOND FLOOR SAN DIEGO, CA 92131 (858) 751-0633 DATE: July, 2020 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 POP Structural BMPs Attachment 1: Backup for POP Pollutant Control BMPs Attachment Ia: DMA Exhibit Attachment 1 b: Tabular Summary of DMAs and Design Capture Volume Calculations Attachment IC: Harvest and Use Feasibility Screening (when applicable) Attachment 1d: Categorization of Infiltration Feasibility Condition (when applicable) Attachment I e: 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 Attachment 2d: Flow Control Facility Design Attachment 3: Structural BMP Maintenance Thresholds and Actions Attachment 4: Single Sheet BMP (SSBMP) Exhibit Attachment 5: Geotechnical Report for Project Site Attachment 6: Drainage Report for Project Site CERTIFICATION PAGE Project Name: Buena Vista Reservoir Site Project ID: CUP 2018-00231GR2019-0040!DWG 521-IA I hereby declare that I am the Engineer in Responsible Charge of design of storm water BMPs for this project, and that I have exercised responsible charge over the design of the project as defined in Section 6703 of the Business and Professions Code, and that the design is consistent with the requirements of the BMP Design Manual, which is based on the requirements of SDRWQCB Order No. R9-2013-0001 (MS4 Permit) or the current Order. I have read and understand that the City Engineer has adopted minimum requirements for managing urban runoff, including storm water, from land development activities, as described in the BMP Design Manual. I certify that this SWQMP has been completed to the best of my ability and accurately reflects the project being proposed and the applicable source control and site design BMPs proposed to minimize the potentially negative impacts of this project's land development activities on water quality. I understand and acknowledge that the plan check review of this SWQMP by the City Engineer is confined to a review and does not relieve me, as the Engineer in Responsible Charge of design of storm water BMPs for this project, of my responsibilities for project design. _ 'flg7 I _ of Work's Signature, PE Number & Expiration"" Date Nick shogios Print Name C Latitude 33 Plannina & Enaineerina . M- Company Date PROJECT VICINITY MAP I I I I I I I I I I- - I I : Ir -- I I I I I I I I I I -U, VICINITY City's Storm Water Standard Questionnaire (Form E-34) (Pam-City of STORM WATER STANDARDS Development Services Carlsbad QUESTIONNAIRE Land Development Engineering 1635 Faraday Avenue E-34 (760) 602-2750 www.carlsbadca.gov INSTRUCTIONS: 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 or be subject to PRIORITY DEVELOPMENT PROJECT' (PDP) 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 stions, please seek assistance from Land Development Engineering staff. 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: Buena Vista Reservoir Site (Park) PROJECT ID: CUP20I8-0023 ADDRESS: 1605 Buena Vista Way, Carlsbad, CA 92008 APN: 156-200-16 The project is (check one): CK New Development 0 Redevelopment The total proposed disturbed area is: 126,603 ft2 ( 2.9 ) acres The total proposed newly created and/or replaced impervious area is: 23,382 ft2 ( 0.5 ) 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 I and follow the instructions. When completed, sign the form at the end and submit this with your application to the city. E-34 Page 1 of 4 REV 02/16 STEP I TO BE COMPLETED FOR ALL PROJECTS 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 o 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 5, mark the third 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: tour 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: Designed and constructed to direct storm water runoff to adjacent vegetated areas, or other non- erodible permeable areas; Designed and constructed to be hydraulically disconnected from paved streets or roads; Designed and constructed with permeable pavements or surfaces in accordance with USEPA Green Streets guidance? 2. Retrofitting or redeveloping existing paved alleys, streets, or roads that are designed and constructed in o accordance 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? 0 I If you answered "yes" to one or more of the above questions, provide discussion/justification below, then go to Step 5, 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): I ii you answered "no" to the above questions, your project is not exempt from POP, go to Step 3. E-34 Page 2of4 REV 04/17 STEP TO BE COMPLETED FOR ALL NEW OR REDEVELOPMENT PROJECTS determine if your project is a POP, please answer the following questions (MS4 Permit Provision E.3.b.(1)): YES NO Is your project a new development that creates 10,000 square feet or more of impervious surfaces collectively over the entire project site? This includes commercial, industrial, residential, mixed-use, C9 0 and public development projects on public or private land. 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 of impervious surface? This includes commercial, industrial, residential, mixed-use, and public development projects on public or private land. Is your project a new or redevelopment project that creates and/or replaces 5,000 square feet or more of impervious 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 0 refreshment stands selling prepared foods and drinks for immediate consumption (Standard Industrial Classification (SIC) code 5812). 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 hillside 0 development project includes development on any natural slope that is twenty-five percent or greater. Is your project a new or redevelopment project that creates and/or replaces 5,000 square feet or more of impervious 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. Is your project a new or redevelopment project that creates and/or replaces 5,000 square feet or more of impervious street, road, highway, freeway or driveway surface collectively over the entire project El N site? A street, road, highway, freeway or driveway is any paved impervious surface used for the transportation of automobiles, trucks, motorcycles, and other vehicles. Is your project a new or redevelopment project that creates and/or replaces 2,500 square feet or more of impervious surface collectively over the entire site, and discharges directly to an Environmentally Sensitive Area (ESA)? "Discharging Directly to" includes flow that is conveyed overland a distance of 0 CR 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).* Is your project a new development or redevelopment project that creates and/or replaces 5,000 square feet 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. Is your project a new development or redevelopment project that creates and/or replaces 5,000 square feet or more of impervious area that supports a retail gasoline outlet (RGO)? This category includes El 0 RGO'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. Is your project a new or redevelopment project that results in the disturbance of one or more acres of land and are expected to generate pollutants post construction? 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%? (CMC 0 21.203.040) If you answered "yes" to one or more of the above questions, your project is a POP. If your project is a redevelopment project, go to step 4. If your project is a new project, go to step 5, check the first box stating "My project is a PDP . and complete applicant information. If you answered uflO to all of the above questions, your project is a 'STANDARD PROJECT.' Go to step 5, check the second box stating "My project is a 'STANDARD PROJECT'...' and complete applicant information. E-34 Page 3of4 REV 04/17 STEP TO BE COMPLETED FOR REDEVELOPMENT PROJECTS THAT ARE PRIORITY DEVELOPMENT PROJECTS (PDP) 0 ONLY . S mplete the questions below regarding your redevelopment project (MS4 Permit Provision E.3.b.(2)): YES NO Does the redevelopment project result in the creation or replacement of impervious surface in an amount of less than 50% of the surface area of the previously existing development? Complete the percent impervious calculation below: Existing impervious area (A) = 10,240 sq. ft. 0 Total proposed newly created or replaced impervious area (B) = 23,382 sq. ft. Percent impervious area created or replaced (BIA)100 = 228 % If you answered "yes", the structural BMPs required for POP apply only to the creation or replacement of impervious surface and not the entire development. Go to step 5 check the first box stating "My project is a PDP ..." and complete applicant information. If you answered "no," the structural BMP's required for PDP apply to the entire development. Go to step 5, check the check the first box stating "My project is a PDP ..." and complete applicant information. STEP5 . S •. CHECK THE APPROPRIATE BOX AND COMPLETE APPLICANT INFORMATION My project is a PDP and must comply with PDP stormwater requirements of the BMP Manual. I understand I must prepare a Storm Water Quality Management Plan (SWQMP) for submittal at time of application. 0 My project is a 'STANDARD PROJECT' OR EXEMPT from PDP and must only comply with 'STANDARD PROJECT' stormwater requirements of the BMP Manual. As part of these requirements, I will submit a "Standard Project Requirement Checklist Form E-36" and incorporate low impact development strategies throughout my project. te: For projects that are close to meeting the POP threshold, staff may require detailed impervious area calculations id exhibits to verify if 'STANDARD PROJECT' stormwater requirements apply. fl My Project is NOT a 'development project' and is not subject to the requirements of the BMP Manual. Applicant Information and Signature Box Applicant Name: Nick Psyhopios Applicant Title: Principal Applicant Signaturer"(.. Date: nvurunmentauuy oensiuve areas inciuoe out are not uimiiea to aii L,Iean vvaier #kCT ziection JUJ(0) impaired water 000ies; areas designated as Areas of Special Biological Significance by the State Water Resources control Board (Water Quality Control Plan for the San Diego Basin (1994) and amendments); water bodies designated with the RARE beneficial use by the State Water Resources Control Board (Water Quality Control Plan for the San Diego Basin (1994) and amendments); areas designated as preserves or their equivalent under the Multi Species Conservation Program within the Cities and County of San Diego: Habitat Management Plan; and any other equivalent environmentally sensitive areas which have been identified by the City. This Box for City Use Univ City Concurrence: YES NO 0 By: Date: Project ID: E-34 Page 4of4 REV 04/17 SITE INFORMATION CHECKLIST Project Summary Information Project Name Buena Vista Reservoir Site Project ID :up 2018-0023 I GR2018-0040 Project Address 1605 Buena Vista Way, Carlsbad, CA 92008 Assessor's Parcel Number(s) (APN(s)) 156-200-16 Project Watershed (Hydrologic Unit) Carlsbad 904 Parcel Area 2.82 Acres (122,758 Square Feet) Existing Impervious Area (subset of Parcel Area) 0.24 Acres (10.240 Square Feet) Area to be disturbed by the project (Project Area) 2.91 Acres (126.603 Square Feet) Project Proposed Impervious Area (subset of Project Area) 0.54 Acres (23.382 Square Feet) Project Proposed Pervious Area (subset of Project Area) 2.37 Acres (103.221 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): o Existing development 0 Previously graded but not built out F] Agricultural or other non-impervious use E] Vacant, undeveloped/natural Description /Additional Information: The site has been mass graded and houses water supply infrastructure for the Carlsbad Municipal Water District. No additional structures have been built on site and the lot is primarily pervious landscape with some paving for vehicle access. Existing Land Cover Includes (select all that apply): Vegetative Cover Non-Vegetated Pervious Areas Z Impervious Areas Description /Additional Information: Vegetation consists primarily of scattered grass and bushes with a small number of trees. Approximately 1/3 of the site is non-vegetated dirt. Addit'ionally, there is a paved vehicle access road in the center of the lot. Underlying Soil belongs to Hydrologic Soil Group (select all that apply): LJNRCS Type A ZNRCS Type B DNRCS Type C EJNRCS Type D Approximate Depth to Groundwater (GW): E GW Depth < 5 feet 05 feet <GW Depth < 10 feet El lo feet <GW Depth <20feet Z GW Depth > 20 feet Existing Natural Hydrologic Features (select all that apply): o Watercourses 0 Seeps 0 Springs 0 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]: Under pre-project conditions, the site is in a non-built out, mass graded state and has ground cover consisting of scattered grasses and bushes with some paved areas for vehicle access. The existing site does not have any storm drain infrastructure built up and all drainage is conveyed via non-channelized, surface sheet flow. Currently, the project site discharges runoff to the surrounding lots to the East, West, and South and Buena Vista Way to the North. After leaving the property, runoff is captured by existing storm drain facilities in the surrounding streets and conveyed northwest to Buena Vista Lagoon. Offsite flows are not conveyed over the project site. Description of Proposed Site Development and Drainage Patterns Project Description / Proposed Land Use and/or Activities: This project proposes to construct a public park on site as well as improvements along the property's frontage on Buena Vista Way that include parking stalls, curb ramps at street crossings, and concrete sidewalk. The park will have a concrete drainage ditch constructed at its perimeter to prevent runoff from leaving the site to adjacent parcels as it does in the existing condition. The park will consist primarily of garden and lawn areas with a pedestrian walkway for circulation to a proposed playground and picnic table/bench locations placed throughout the lot. The existing water distribution infrastructure onsite will be protected in place and fenced off from public access. Additional fencing is proposed at the perimeter of the lot to provide a barrier between the park and the adjacent private lots. List/describe proposed impervious features of the project (e.g., buildings, roadways, parking lots, courtyards, athletic courts, other impervious features): Concrete Sidewalk Asphalt Paving for Parking Stalls Picnic Tables and Benches List/describe proposed pervious features of the project (e.g., landscape areas): Lawn Areas Garden Areas Pollution Control Basins Does the project include grading and changes to site topography? ZYes F] No Description /Additional Information: The lot will be regraded to allow for-the construction of the public park. Existing retaining walls onsite will be removed, and proposed landscape mounding will be used as a visual barrier between the park and the surrounding properties. Does the project include changes to site drainage (e.g., installation of new storm water conveyance systems)? ZYes flNo Description / Additional Information: A concrete brow ditch will be installed at the lot perimeter to prevent site runoff from flowing onto adjacent properties as it does in the existing condition. Storm water will be conveyed to a proposed biofiltration basin and then discharged North to a single outfall onto Buena Vista Way. 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 9 Interior floor drains and elevator shaft sump pumps O Interior parking garages El Need for future indoor & structural pest control Z Landscape/Outdoor Pesticide Use 0 Pools, spas, ponds, decorative fountains, and other water features 0 Food service Refuse areas 0 Industrial processes 0 Outdoor storage of equipment or materials El Vehicle and Equipment Cleaning El Vehicle/Equipment Repair and Maintenance 0 Fuel Dispensing Areas 0 Loading Docks O Fire Sprinkler Test Water 0 Miscellaneous Drain or Wash Water Z 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): The project site discharges storm water to the surrounding parcels and adjacent public street. From here, runoff surface flows to existing storm drain infrastructure in the surrounding roadways and is then conveyed Northwest before being discharged into Buena Vista Lagoon. 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 Indicator Bacteria TMDL Estimate 2008 Nutrients TMDL Estimate 2019 Buena Vista Lagoon Sedimentation/Siltation TMDL Estimate 2019 Toxicity TMDL Estimate 2027 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): Also a Receiving Not Applicable to Anticipated from the Water Pollutant of Pollutant the Project Site Project Site Concern Sediment X X Nutrients X X Heavy Metals Organic Compounds Trash & Debris X Oxygen Demanding Substances Oil& Grease X Bacteria & Viruses X X Pesticides X uirements 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. O 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. O 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 I Additional Information (to be provided if a 'No' answer has been selected above): Storm water is discharged from the project site and then conveyed via roadway surface flow before entering existing storm drain infrastructure offsite. From here it is then discharged into Buena Vista Lagoon, which is a hydromodification exempt water body. Additionally, the proposed project is a public park that consists primarily of pervious landscape. The site's DMAs are either De Minimis, Self-Mitigating, or Self-Retaining which are all exempt from Hydromodification requirements. Critical Coarse Sediment Yield Areas* *This Section only reauired if hvdromodification manaaement reauirements aoolv Based on the maps provided within the WMAA, do potential critical coarse sediment yield areas exist within the project drainage boundaries? O Yes No, No Critical course 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? O 6.2.1 Verification of Geomorphic Landscape Untits (GLUs) Onsite O 6.2.2 Downstream Systems Sensitivity to Coarse Sediment El 6.2.3 Optional Additional Analysis of Potential Critical Course Sediment Yield Areas Onsite O No optional analyses performed, the project will avoid critical course sediment yield areas identified based on WMAA maps If optional analyses were performed, what is the final result? O No critical course sediment yield areas to be protect based on verification of GLUs onsite Critical course sediment yield areas exist but additional analysis has determined that protection is not required. Documentation attached in Attachment 8 of the SWQMP. O Critical course 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. Storm water will be conveyed to a proposed biofiltration basin and then discharged North to a single outfall onto Buena Vista Way. This outfall is the only POC of the project and is identified on the HMP exhibit as POC#1. Has a geomorphic assessment been performed for the receiving channel(s)? No, the low flow threshold is 0.1 Q2 (default low flow threshold) U Yes, the result is the low flow threshold is 0.1 Q2 O Yes, the result is the low flow threshold is 0.3Q2 0 Yes, the result is the low flow threshold is 0.5Q2 If a geomorphic assessment has been performed, provide title, date, and preparer: 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. A lack of existing storm drain infrastructure in the surrounding area means that the project will need to discharge to grade. This will affect the design for the proposed structural BMP, specifically the outlet structure. 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. (Cit y o f Carlsbad STANDARD PROJECT REQUIREMENT CHECKLIST E-36 Development Services Land Development Engineering 1635 Faraday Avenue (760) 602-2750 www.carlsbadca.gov Project Information Project Name: Buena Vista Reservoir Site Project ID: CUP 2018.00231 GR2019-0040 DWG No. or Building Permit No.: DM 521-IA Source Control BMPs All development projects must implement source control BMPs SC-I through SC-6 where applicable and feasible. See Chapter 4 and Appendix E.1 of the BMP Design Manual (Volume 5 of City Engineering Standards) for information to implement source control BMPs shown in this checklist. Answer each category below pursuant to the following. "Yes" means the project will implement the source control BMP as described in Chapter 4 and/or Appendix EA of the Model BMP Design Manual. Discussion/justification is not required. "No" means the BMP is applicable to the project but it is not feasible to implement. Discussion/justification must be provided. Please add attachments if more space is needed. "N/A" means the BMP is not applicable at the project site because the project does not include the feature that is addressed by the BMP (e.g., the project has no outdoor materials storage areas). Discussion/justification may be provided. I Source Control Requirement Applied? .C-1 Prevention of Illicit Discharges into the MS4 III Yes 0 No 1 0 N/A Discussion/justification if SC-1 not implemented: SC-2 Storm Drain Stenciling or Signage IN Yes 0 No 0 N/A Discussion/justification if SC-2 not implemented: SC-3 Protect Outdoor Materials Storage Areas from Rainfall, Run-On, Runoff, and Wind Ill Yes 0 No 0 N/A Dispersal Discussion/justification if SC-3 not implemented: E-36 Page 1 of 4 Revised 09/16 Source Control Requirement (continued) I Applied? SC-4 Protect Materials Stored in Outdoor Work Areas from Rainfall Run-On Runoff, and Wind Dispersal HYes 0 No 0 N/A liscussion/justification if SC-4 not implemented: SC-5 Protect Trash Storage Areas from Rainfall, Run-On, Runoff, and Wind Dispersal 1J Yes 0 No 0 N/A Discussion/justification if SC-5 not implemented: SC-6 Additional BMPs based on Potential Sources of Runoff Pollutants must answer for each source listed below and identify additional BMPs. (See Table in Appendix E.1 of BMP Manual for guidance). III On-site storm drain inlets ill Yes 0 No 0 N/A Interior floor drains and elevator shaft sump pumps 0 Yes 0 No 0 N/A Interior parking garages. 0 Yes 0 No 0 N/A Need for future indoor & structural pest control 0 Yes 0 No 0 N/A ii Landscape/Outdoor Pesticide Use IJ Yes 0 No 0 N/A Cl Pools, spas, ponds, decorative fountains, and other water features 0 Yes 0 No 0 N/A Food service 0 Yes 0 No 0 N/A Refuse areas 0 Yes 0 No 0 N/A Industrial processes 0 Yes 0 No 0 N/A Outdoor storage of equipment or materials 0 Yes 0 No 0 N/A Vehicle and Equipment Cleaning 0 Yes 0 No 0 N/A Vehicle/Equipment Repair and Maintenance 0 Yes 0 No 0 N/A Cl Fuel Dispensing Areas 0 Yes 0 No 0 N/A Loading Docks 0 Yes 0 No 0 N/A Fire Sprinkler Test Water 0 Yes 0 No 0 N/A Miscellaneous Drain or Wash Water 0 Yes 0 No 0 N/A X Plazas, sidewalks, and parking lots l!l Yes 0 No 0 N/A For 'Yes" answers, identify the additional BMP per Appendix E.1. Provide justification for "No" answers. All storm water runoff on site will be captured and treated in a Biofiltration (BF-1) BMP prior to discharge. On-site Storm Drain Inlets will be marked with the words "No Dumping! Flows to Bay" or similar. Landscape/Outdoor Pesticide Use will be designed to minimize irrigation and runoff, promote surface infiltration where applicable, and minimize the use of fertilizers and pesticides that can contribute to storm water pollution. Plazas, Sidewalks, and Parking Lots will be swept regularly to prevent debris from accumulating and entry into the storm drain system. E-36 Page 2 of 4 Revised 09/16 Site Design BMPs All development projects must implement site design BMPs SD-1 through SD-8 where applicable and feasible. See Chapter 4 and Appendix E.2 thru E.6 of the BMP Design Manual (Volume 5 of City Engineering Standards) for information implement site design BMPs shown in this checklist. Answer each category below pursuant to the following. "Yes" means the project will implement the site design BMPs as described in Chapter 4 and/or Appendix E.2 thru E.6 of the Model BMP Design Manual. Discussion /justification is not required. "No" means the BMPs is applicable to the project but it is not feasible to implement. Discussion/justification must be provided. Please add attachments if more space is needed. "N/A" means the BMPs is not applicable at the project site because the project does not include the feature that is addressed by the BMPs (e.g., the project site has no existing natural areas to conserve). Discussion/justification may be provided. Site Design Requirement Applied? SO-1 Maintain Natural Drainage Pathways and Hydrologic Features 0 Yes I i No I 0 N/A Discussion/justification if SD-1 not implemented: The existing drainage pattern for the site directs runoff to adjacent parcels. To correct this, the project area will be regraded to capture and treat all runoff onsite prior to discharge at a single point of compliance onto Buena Vista Way. SD-2 Conserve Natural Areas, Soils, and Vegetation I 0 Yes I M No 1 0 N/A Discussion/justification if SD-2 not implemented: The existing site soil and vegetation have already been altered from their natural state by the original mass grading of the lot. The site as currently graded will be replaced with lawn and garden areas to facilitate public park use. SD-3 Minimize Impervious Area I a Yes I 0 No I 0 N/A Discussion/justification if SD-3 not implemented: SD-4 Minimize Soil Compaction I iii Yes I 0 No I 0 N/A Discussion/justification if SD-4 not implemented: SD-5 Impervious Area Dispersion I l!I Yes I 0 No I 0 N/A Discussion/justification if 50-5 not implemented: E-36 Page 3 of 4 Revised 09/16 Site Design Requirement (continued) Applied? SD-6 Runoff Collection Yes I 0 No 0 N/A Discussion/justification if SD-6 not implemented: SD-7 Landscaping with Native or Drought Tolerant Species I I!I Yes I 0 No I 0 N/A Discussion/justification if SD-7 not implemented: SD-8 Harvesting and Using Precipitation I 0 Yes I ii No I 0 N/A Discussion/justification if SD-8 not implemented: Per included Harvest and Use Feasibility Form 1-7, harvest and use is deemed infeasible for the project site. E-36 Page 4 of 4 Revised 09/16 All PDPs must implement structural BMPs for storm water pollutant control (see Chapter 5 of the BMP Design Manual). Selection of PDP structural BMPs for storm water pollutant control must be based on the selection process described in Chapter 5. PDPs subject to hydromodification management requirements must also implement structural BMPs for flow control for hydromodification management (see Chapter 6 of the BMP Design Manual). Both storm water pollutant control and flow control for hydromodification management can be achieved within the same structural BMP(s). POP structural BMPs must be verified by the City at the completion of construction. This may include requiring the project owner or project owner's representative to certify construction of the structural BMPs (see Section 1.12 of the BMP Design Manual). PDP structural BMPs must be maintained into perpetuity, and the City must confirm the maintenance (see Section 7 of the BMP Design Manual). Use this form to provide narrative description of the general strategy for structural BMP implementation at the project site in the box below. Then complete the PDP structural BMP summary information sheet for each structural BMP within the project (copy the BMP summary information page as many times as needed to provide summary information for each individual structural BMP). 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. Step 1: Per the included Harvest and Use feasibility form 1-7, the project is considered infeasible for harvest and use. Step 2: Per the included Form 1-8 Categorization of Infiltration Feasibility Condition the feasibility screening category is No Infiltration. Based on this condition the proposed project has selected biofiltration (BF-1) to mitigate for pollutant control requirements. Step 3: Due to the lack of existing underground storm drain in the area, it was determined that the outlet structure for the Biofiltration basin will need to be designed to discharge to grade. Step 4: Proposed Biofiltration is sized to account for Hydromodification. One of the DMAs on the proposed project is categorized as Self-Mitigating and therefore exempt from Hydromodification requirements. Step 5: A Storm Water BMP Maintenance agreement will be executed to ensure long-term maintenance of all structural BMPs. Structural BMP Summary Information [Copy this page as needed to provide information for each individual proposed structural BMP] Structural BMP ID No.: BMP #10 DWG: 521-IA Sheet No.: C-4.0 Type of structural BMP: El Retention by harvest and use (HU-l) Retention by infiltration basin (INF-I) Retention by bioretention (INF-2) 0 Retention by permeable pavement (INF-3) Partial retention by biofiltration with partial retention (PRA) Biofiltration (BF-1) Flow-thru treatment control included as pre-treatment I 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 0 Combined pollutant control and hydromodification control Pre-treatment / forebay for another structural BMP O Other (describe in discussion section below Discussion (as needed): BMP 10 will consist of a BF-1 Biofiltration Basin for pollution and flow control. This basin will consist of 12-inches of surface ponding, 18 inches of amended soil with the top 3-inches being mulch, a 6" filter course layer, and 12-inch gravel storage layer with a perforated pipe underdrain. The underdrain will be located a minimum 3-inches above the bottom of the basin. The basin will be equipped with an outlet structure that will be sized to allow for the safe conveyance of the 100-year storm event. Per the geotechnical engineer's recommendations, due to the poor infiltration feasibility and expansive soils, infiltration should be avoided. To mitigate for this impact, the basin will be wrapped in an impervious liner. ATTACHMENT I BACKUP FOR PDP POLLUTANT CONTROL BMPS This is the cover sheet for Attachment I. Check which Items are Included behind this cover sheet: Attachment Contents Checklist Sequence Attachment 1 DMA Exhibit (Required) Z Included See DMA Exhibit Checklist on the back of this Attachment cover sheet. (24"x36" Exhibit typically required) Attachment lb Tabular Summary of DMAs Showing Included on DMA DMA ID matching DMA Exhibit, DMA Exhibit in Attachment la Area, and DMA Type (Required)* *provide table in this Attachment OR El Included as Attachment b, separate from DMA on DMA Exhibit in Attachment 1 Exhibit Attachment Ic Form 1-7, Harvest and Use Feasibility Z Included Screening Checklist (Required unless the entire project will use infiltration El Not included because the BMPs) entire project will use infiltration BMPs Refer to Appendix 13.3-1 of the BMP Design Manual to complete Form 1-7. Attachment Id Form 1-8, Categorization of Infiltration Z Included Feasibility Condition (Required unless the project will use harvest and use El Not included because the BMPs) entire project will use harvest and use BMPs Refer to Appendices C and 0 of the BMP Design Manual to complete Form 1-8. Attachment le Pollutant Control BMP Design Z Included Worksheets I Calculations (Required) Refer to Appendices B and E of the BMP Design Manual for structural pollutant control BMP design guidelines 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 Existing natural hydrologic features (watercourses, seeps, springs, wetlands) Critical coarse sediment yield areas to be protected Z Existing topography and impervious areas Existing and proposed site drainage network and connections to drainage offsite Z Proposed grading Z 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) Potential pollutant source areas and corresponding required source controls (see Chapter 4, Appendix E. 1, and Form 1-313) Z Structural BMPs (identify location, type of BMP, and size/detail) EXISTING SITE INFORMATION LEGEND HYDROLOGIC SOIL GROUP: B GROUND WA TER: GROUND WA TER DEPTH IS GREA TER THAN 7 FEET PER CEO TECHNICAL INVEST/CA TION BY CEOCON INC., DATED FEBRUARY 9, 2018, PROJECT NO. G2225-52-01. EXISTING NATURAL HYDROLOGIC FEATURES: NO NATURAL HYDROLOGIC FEATURES EXIST ONSITE CRITICAL COARSE SEDIMENT YIELD AREAS: NO CRITICAL COARSE SEDIMENT YIELD AREAS (CCSYAS) EXIST ONSITE. NO PROTECTION OF CCSYAS REQUIRED. EXISTING TOPOGRAPHY AND IMPERVIOUS AREA: EXISTING TOPOGRAPHY SHOWN HEREON. SEE AREA SUMMARY TABLE FOR EXISTING IMPERVIOUS AREA. EXISTING DRAINAGE: THE EXISTING DRAINAGE CONVEYANCE IS SURFACE FLOW OVER PREVIOUSLY GRADED TERRAIN. IT OVERFLOWS TO THE ADJACENT PARCELS TO THE WEST EAST, AND SOUTH AND TO BUENA VISTA WAY TO THE NORTH. FROM THESE POINTS OF DISCHARGE IT IS THEN CONVEYED TO THE EXISTING STORM DRAIN SYSTEM IN THE NEARBY ROAD WA YS. PROPOSED DRAINAGE: THE PROPOSED PUBLIC PARK WILL CONSIST PRIMARILY OF LANDSCAPED LAWN AND GARDEN AREAS WITH SMALL AMOUNTS OF IMPERVIOUS SURFACES FOR PEDESTRIAN WALKWAYS AND PLAZA AREAS THROUGHOUT THE SITE. ADDITIONALLY, PUBLIC IMPROVEMENTS INCLUDING PARKING STALLS AND A CONCRETE SIDEWALK ARE PROPOSED ALONG THE SOUTHERN EDGE OF BUENA VISTA WAY. IMPERVIOUS-ASPHALT IMPERVIOUS-CONCRETE PAVEMENT 1 SEMI -PER VIOUS TURF PERVIOUS-LANDSCAPING DECOMPOSED GRANITE IMPERVIOUS-BROW DITCH STORM WATER RUNOFF WILL PRIMARILY BE CONVEYED VIA SURFACE SHEET FLOW TOWARDS A PROPOSED BIOFILTRATION FACILITY AT THE NORTHWEST CORNER OF THE PROPERTY. IMPERVIOUS AREAS ONSITE WILL BE DIRECTED TOWARDS PROPOSED LANDSCAPING ACTING AS DISPERSION PR/OR TO REACHING THE BMP. RUNOFF NEAR THE WEST EAST, AND SOUTH PER/METER OF THE PROPERTY WILL FLOW INTO A PROPOSED CONCRETE BROW DITCH WHERE IT WILL THEN BE CONVEYED TO THE NORTHWEST CORNER OF THE SITE. FROM HERE IT WILL BE DISPERSED TO LANDSCAPING BEFORE SURFACE FLOWING INTO THE PROPOSED BIOFIL TRA TION BASIN. THE BASIN ULTIMATELY DISCHARGES NORTH TO SURFACE GRADE ON BUENA VISTA WAY. PROPOSED GRADING: SHOWN HEREON. PROPOSED IMPERVIOUS FEATURES: SHOWN HEREON. PROPOSED DESIGN FEATURES: SITE DESIGN REQUIREMENTS SHOWN HEREON. SEE FORM 1-58 FOR EXPLANA TION. DRAINAGE MANAGEMENT AREAS: SHOWN HEREON. SEE DMA SUMMARY TABLE. POTENTIAL POLLUTANT SOURCE AREAS AND SOURCE CONTROL: SHOWN HEREON. SEE FORMS 1-38 AND 1-4 FOR EXPLANATION. STRUCTURAL BMPS. ALL PROPOSED IMPROVEMENTS DRAIN TO A STRUCTURAL BMP (SHOWN HEREON AS BMP#10). BMP#10 IS A BIOFIL TRA 77ON BASIN (TC-32). s - - - - DMA BOUNDARY = = PROPOSED STORM DRAIN SYSTEM DMA IDENTIFIER AREA DMA 1.1 NAME AREA (SF) SOIL TYPE POST PROJECT DMA RUNOFF DMA AREA X SURFACE FACTOR RUNOFF DMA 1.1-1 2,450 B IMPERVIOUS 0.9 2,205 AC PAVEMENT DMA 1 3,260 B SEMI-PER VIOUS.1-2 0.3 978 DG DMA 1,1-3 13,400 B IMPERVIOUS 0.9 12,060 CONCRETE DMA 1.1-4 72,713 B PERVIOUS 0.1 7,274 LANDSCAPE DMA 1.1-5 2,860 B SEMI-PERVIOUS TURF 0.3 858 TOTAL AREA 94,683 AREA DMA 1.2 NAME AREA (SF) SOIL TYPE POST PROJECT DMA RUNOFF DMA AREA X SURFACE FACTOR RUNOFF IMPERVIOUS DMA 1.2-1 1,090 8 CONCRETE ACTING 0.9 981 AS BROW DITCH 'd DMA 1.2-2 9,530 B PERVIOUS 0.1 913 LANDSCAPE TOTAL AREA 10,620 SD-7 LANDSCAPING WITH NATIVE OR 3 DROUGHT TOLERANT SPECIES (TYP). SD-5 IMPERVIOUS AREA DISPERSION. \ - \ POC#1 / Z BUENA VISTA WAY ON S. POTENTIAL POLLUTANT SOURCE AREA: SIDEWALK (TYP). POTENTIAL POLLUTANT SOURCE AREA: PLAZA (TYP). vl - - - - - POTENTIAL POLLUTANT SOURCE lx ---- _-' AREA LANDSCAPING (TYP) \> N SD-7 LANDSCAPING WITH NATIVE OR PROPOSED ROCK LINED SWALE Z \X,\\ \\ \ DROUGHT TOLERANT SPECIES (TYP) SD-6 RUNOFF COLLECTION. SD-5 IMPERVIOUS AREA DISPERSION 1 A \7 POTENTIAL POLLUTANT SOURCE ,\ AREA SIDEWALK (TYP) POTENTIAL POLLUTANT SOURCE AREA LANDSCAPING (TYP) SD-7 LANDSCAPING WITH NATIVE OR DROUGH T TOLERANT SPECIES (TYP). ~xx 1.2 0, 1'.'A SD-5 IMPERVIOUS AREA DISPERSION. / t / PROPOSED ROCK LINED S WALE SD -6 RUNOFF COLLECTION. -1 - PROPOSED CONCRETE BROW DI TC P0 TEN LPOLWTANTSOURcE AREA: ONSITE STORM DRAIN INLET -6 RUNOFF COLLECTION. SD N SD-7 LANDSCAPING WITH NATIVE OR U3 - DROUGHT TOLERANT SPECIES (TYP). SD-5 IMPERVIOUS AREA DISPERSION. AREA DMA 2- SELF MITIGATING NAME AREA (SF) SOIL TYPE POST PROJECT DMA RUNOFF DMA AREA X SURFACE FACTOR RUNOFF DMA 2-1 370* B IMPERVIOUS 0.9 333 CONCRETE DMA 2-2 17,670 B PERVIOUS 0.1 1,767 LANDSCAPE DMA 2-3 150 B SEMI-PERVIOUS 0.3 45 DC IMPER VIOUS DMA 2-4 1,710 B CONCRETE ACTING 0.9 1,539 AS BROW DITCH TOTAL AREA 19,900 * 1.97. OF TOTAL AREA <5% AREA DMA 3* NAME AREA (SF) SOIL TYPE POST PROJECT DMA RUNOFF DMA AREA X SURFACE FACTOR RUNOFF DMA 3-1 1,250 B IMPERVIOUS 0.9 1,121 AC PA VEMEN T DMA 3-2 70 B PER VIOUS LANDSCAPE 0.1 7 DMA 3-3 80 B IMPERVIOUS 0.9 72 CONCRETE TOTAL AREA 1,400 o 25 50 700 150 ( IN FEET ) 1 inch = 50 ft. SCALE: NOTED DATE: 12/31/19 DRAWN BY: JOB NO: 1587.00 CHECKED BY: AREA SUMMARY TABLE EXISTING CONDITION POST-CONSTRUCTION CONDITION DIFFERENCE IMPERVIOUS AREA 10,240 SF (0.24 AC) - 8.17,, 23,382 SF (0.54 AC) - 18.5% +13,142 SF PERVIOUS AREA 116,363 (2.67 AC) - 91.9% 103,221 (2.37 AC) - 81.5% -13,142 SF TOTAL AREA 126,603 SF (2.91 AC) 126,603 SF (2.91 AC) - - - *DMA IS INFEASIBLE TO BE TREATED. HOWEVER, WILL BE INCLUDED FOR BIOFIL TRA TION SIZING TO ACCOUNT FOR STORM WATER QUALITY AND HMP REQUIREMENTS JO latituda' SS PLANNING & ENGINEERING 9968 Hibert Street Floor, San Diego, CA 92131 Tel 858.751.0633 SHEET: 1 OF 2 H:\1500\1587.00 - Schmidt Design Group - Carlsbad Park\Engineering\Reports\Water auality\flnal\Attachment 1 - Pollutant Control 8ackup\Attochment la & 1W24 9Ethib\45BAløO EIMA.dwg 0.75 0.75 0.5 0.5 0.5 SEAWA L RISC Op tit- YO C\ lqp 0 i W so,~k qr 04f 1.05 09 74 W RD -J 09S 1 / I OLD MILKY: L_IIIJ \ I / 08 0.75 PY C IT ix UCAD A - I j N VALLEY RD HAVERFORD EPILE ST/ \ ( ( y /TA ID iL MTN'J4R - CAIW DEL GID - ND VALLEY RD MONTECITO HANSON LN 01 \ / J r YE RD ------ — -j \ \ r / \\\\\\ \ RD \\\\\ I 4, a San Diego County 0 1 0 \ 'As, SAN DIEGO" ------- MEL \ /J ! f 85th Percentile Isopluv ials H \ \ r I \ GHTS RD RD / t I / I \ / f j I I ' PARKS / POWAY PY , / ,f nJ.cpl:.\ RUt h,1. ,.U.(. — I 'S 85th Percentile Rainfall in Inches -4 111?~, V-- 10 P, MESA "lop Freeway Highway G vp CAI) w C3 Major Road o.95 Street N ELo r 0 AO RD 1~1 Water Body C ST AIREM60 r BL •* I/ / ALPINE o____ / OS PIP /C/f4\\\ ,PLB0A A\\\IERRASAN N / I - - 095 Q: C7 - SSIONC EBRADtAV ''- o' Note \ AEROO\\ I py — 0 ;G9A ° - k a - a ( U) (1 The 85th percentile is a 24-hour rainfall total. - •AIST, EN,ADISON - \ \ N \ \ ' ,\ \ \ 0 •'j' 0 \ DALLA 11ISSION B- 11 E observed 24-hour rainfall totals will be less > Q5 WAS~~4 A ILI than that value. 0 --ttpf~§ -4 4toll;JEZIL)h A RD SEA WORLD ADAMSA 2 AV EADE AV N1. < MADISON W LEWIS ST t~l- 10<1 AY LIN+srry F- 01- RO 6S 0,, U) AS STj QWNCE ?%,I1- ØYST 1 1.35 to TH HARBOR a! X BROA Y 21 pF WLETWAJLRRLSERJ'OIR / --' - _RIAL AN ET UJ 74 1.05 0 74i 05 OIAX H ST 09 0 51 0.85 Land Use & Environment Group / Geographic Information Service 0 1 2 3 4 Miles ' 'jt t1 / c: I -MAtN' ( ANGE AV S ST THIS MAPA)ATA IS PROVIDED WITHOUT WARRANTY OF ANY KINDr EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED To, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. Note This product may contain information forn the SANDAG Regional Information Systemhich carrotbe reprodvoedwithout the written pemission of SANDA This product may contain information reproduced with permission granted by RAND MONALLY & COMPANY(g) all or any part t1erebf. whetlier for personal use or resale, without the priorwritten pem ission of to SahGIS. Thi map is copyrighted by RAND MCNALLY & COMPANY(R), It is unt—ful to copy or reproduce RAND LY & COMPANY& Copyright 2011 Eagle Aarial;maging, all rightsreserved, Cpynght \IT SanGIS2011-AlRsghl~lese—cl. Full text of this legal notice can be found W: Oc 10.75 _. 40 05 Projection; Stat Plane, Zone VI, OV Feet. OFLOOD CONTROL\851h Percentile Iso 85th Percentile 5uoiaIs 36o48nud I I Coon4yof9anDieg LUEGGIS, 11130/11 I 1 If) 1 1 '7 1 U 0.75 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 Contents Checklist Sequence Attachment 2a Hydromodification Management Included Exhibit (Required) See Hydromodification Management Exhibit Checklist on the back of this Attachment cover sheet. Attachment 2b Management of Critical Coarse Z Exhibit showing project Sediment Yield Areas (WMAA Exhibit drainage boundaries is required, additional analyses are marked on WMAA Critical optional) Coarse Sediment Yield Area Map (Required) See Section 6.2 of the BMP Design Manual. Optional analyses for Critical Coarse Sediment Yield Area Determination 0 6.2.1 Verification of Geomorphic Landscape Units Onsite O 6.2.2 Downstream Systems Sensitivity to Coarse Sediment 0 6.2.3 Optional Additional Analysis of Potential Critical Coarse Sediment Yield Areas Onsite Attachment 2c Geomorphic Assessment of Receiving Not Performed Channels (Optional) 0 Included See Section 6.3.4 of the BMP Design Manual. Attachment 2d Flow Control Facility Design and Included Structural BMP Drawdown Calculations (Required) See Chapter 6 and Appendix G of the BMP Design Manual 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) Z Critical coarse sediment yield areas to be protected Z Existing topography Z Existing and proposed site drainage network and connections to drainage offsite Proposed grading Z 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) EXISTING SITE INFORMATION WA. LEGEND HYDROLOGIC SOIL GROUP: B GROUND WA TER: GROUND WA TER DEPTH IS GREATER THAN 7 FEET PER CEO TECHNICAL IN VEST/CA TION BY CEOCON INC., DATED FEBRUARY 9, 2018, PROJECT NO. 02225-52-01, EXIST/NC NATURAL HYDROLOGIC FEATURES: NO NATURAL HYDROLOGIC FEATURES EXIST ONS/TE. CRITICAL COARSE SEDIMENT YIELD AREAS: NO CRITICAL COARSE SEDIMENT YIELD AREAS (CCSYAS) EXIST ONSITE. NO PROTECTION OF CCSYAS REQUIRED. EXIST/NC TOPOGRAPHY AND IMPERVIOUS AREA. EXISTING TOPOGRAPHY SHOWN HEREON. SEE AREA SUMMARY TABLE FOR EXIST/NC IMPERVIOUS AREA. EXISTING DRAINAGE: THE EXISTING DRAINAGE CONVEYANCE IS SURFACE FLOW OVER PREVIOUSLY GRADED TERRAIN. IT OVERFLOWS TO THE ADJACENT PARCELS TO THE WEST EAST, AND SOUTH AND TO BUENA VISTA WAY TO THE NORTH. FROM THESE POINTS OF DISCHARGE IT IS THEN CONVEYED TO THE EXISTING STORM DRAIN SYSTEM IN THE NEARBY ROADWAYS. IMPERVIOUS—ASPHALT iIRiE vA v____.rAà .ii-iu AT TACH' IIAIENT 1A + AIG::1 IMPERVIOUS—CONCRETE PAVEMENT SEMI—PER VIOUS— TURF PERVIOUS—LANDSCAPING DECOMPOSED GRANITE PROPOSED SITE INFORMATION SD-7 LANDSCAPING WITH NATIVE OR 3 DROUGHT TOLERANT SPECIES (TYP). SD-5 IMPERVIOUS AREA DISPERSION. \ ': .......:.' ' IMPERVIOUS—BROW DITCH PROPOSED DRAINAGE: THE PROPOSED PUBLIC PARK WILL CONSIST PRIMARILY OF LANDSCAPED LAWN AND GARDEN AREAS WITH SMALL AMOUNTS OF IMPERVIOUS SURFACES FOR PEDESTRIAN WALKWAYS AND PLAZA AREAS THROUGHOUT THE SITE. ADDITIONALLY, PUBLIC IMPROVEMENTS INCLUDING PARKING STALLS AND A CONCRETE SIDEWALK ARE PROPOSED ALONG THE SOUTHERN EDGE OF BUENA VISTA WAY STORM WATER RUNOFF WILL PRIMARILY BE CONVEYED VIA SURFACE SHEET FLOW TOWARDS A PROPOSED BIOFIL TRA TION FACILITY AT THE NORTHWEST CORNER OF THE PROPERTY IMPERVIOUS AREAS ONS'ITE WILL BE DIRECTED TOWARDS PROPOSED LANDSCAPING ACTING AS DISPERSION PRIOR TO REACHING THE BMP. RUNOFF NEAR THE WEST EAST AND SOUTH PERIMETER OF THE PROPERTY WILL FLOW INTO A PROPOSED CONCRETE BROW DITCH WHERE IT WILL THEN BE CONVEYED TO THE NORTHWEST CORNER OF THE SITE FROM HERE IT WILL BE DISPERSED TO LANDSCAPING BEFORE SURFACE FLOWING INTO THE PROPOSED BIOFIL TRA TION BASIN. THE BASIN ULTIMATELY DISCHARGES NORTH TO SURFACE GRADE ON BUENA VISTA WAY PROPOSED GRAD/NC: SHOWN HEREON. PROPOSED IMPERVIOUS FEATURES: SHOWN HEREON. PROPOSED DESIGN FEATURES: SITE DESIGN REQUIREMENTS SHOWN HEREON. SEE FORM I—SB FOR EXPLANA TION. POC#1 _. — — — — DMA BOUNDARY PROPOSED STORM DRAIN SYSTEM DMA IDENTIFIER BMP#10 BIOFIL TRA TION BASIN (TC-32). DRAINAGE MANAGEMENT AREAS: SHOWN HEREON. SEE DMA SUMMARY TABLE. POTENTIAL POLLUTANT SOURCE AREAS AND SOURCE CONTROL: SHOWN HEREON. SEE FORMS I-3B AND 1-4 FOR EXPLANA TION. POTENTIAL POLLUTANT SOURCE AREA: PLAZA (TYP). POTENT/AL POLLUTANT SOURCE AREA: LANDSCAPING (TYP). STRUCTURAL BMPS: ALL PROPOSED IMPROVEMENTS DRAIN TO A STRUCTURAL BMP (SHOWN HEREON AS BMP#10). BMP#JO IS A BIOFIL IRA TION BASIN (TC-32). / - \ / BUENA VISTA WAY _ - " — \ F / \\ *A 'n POTENTIAL POLLUTANT SOURCE AREA: SIDEWALK (TYP). L . --Xv AA S A A A 4 \ . t e v N A 50-7 LANDSCAPING WITH NATIVE OR DROUGHT TOLERANT SPECIES (TYP). SD-5 IMPERVIOUS AREA DISPERSION. POTEN77AL POLLUTANT SOURCE AREA: LANDSCAPING (TYP). PROPOSED ROCK LINED SWALE ILL AREA DMA DMA 11 SD-6 RUNOFF COLLECTION A NAME AREA (SF) SOIL TYPE POST PROJECT DMA RUNOFF DMA AREA X SURFACE FACFOR RUNOFF ' IMPER VIOUS DMA 11-1 2,450 B AC PAVEMENT 09 2,205 POTENTIAL POLLUTANT SOURCE AREA SIDEWALK (TYP) DMA 1.1-2 3,260 B SEMI—PER VIOUS 03 978 DC 13400 B IMPERVIOUS 1O6 N DMA 1 1-3 CONCRETE 09 - DMA 1.1 PER VIOUS —4 72,713 B LANDSCAPE 0.1 7,274 A 'A DMA 7.1-5 2,860 B SEMI—PERVIOUS TURF 03 858 1 TOTAL AREA 94683 50-7 LANDSCAPING WITH NATIVE OR DROUGHT TOLERANT SPECIES (TYP) \'\ 4- SD-5 IMPERVIOUS AREA DISPERSION tan PROPOSED ROCK LINED S WALE /4 AREA DMA 12 50-6 RUNOFF COLLECTION. NAME AREA (SF) SOIL TYPE POS SURFACE FA C TOR RUNOFF T PROJECT DMA RUNOFF DMA AREA X PROPOSED CONCRETE BROW DITCH IMPERVIOUS 50-6 RUNOFF COLLECTION DMA 1.2-1 1,090 B CONCRETE ACTING 0.9 981 ' AS BROW DITCH , POTENTIAL POLLUTANT SOURCE AREA: ONS/TE STORM DRAIN INLET H:I DMA 1.2-2 9,530 B ] PER VIOUS 0.1 [_913 LANDSCAPE TOTAL AREA 10,620 SD-7 LANDSCAPING WITH NATIVE OR DROUGHT TOLERANT SPECIES (TYP). SD-5 IMPERVIOUS AREA DISPERSION. AREA DMA 2 - SELF MGA11NG NAME AREA (SF) SOIL TYPE POST PROJECT DMA RUNOFF DMA AREA X SURFACE FACTOR RUNOFF DMA 2-1 370* B IMPERVIOUS 0.9 333 CONCRETE DMA 2-2 17,670 B PER VIOUS 0.1 1,767 LANDSCAPE I DMA 2-3 150 B SEMI—PERVIOUS 0.3 45 00 IMPER VIOUS DMA 2-4 1,710 B CONCRETE ACTING 0.9 1,539 AS BROW DITCH TOTAL AREA 19,900 * 1.9% OF TOTAL AREA <5% AREA DMA 3* NAME AREA (SF) SOIL TYPE POST PROJECT DMA RUNOFF DMA AREA X SURFACE FACTOR RUNOFF DMA 3-1 1,250 B IMPERVIOUS 0.9 1,121 AC PA VEMEN T DMA 3-2 70 B PERVIOUS 0.1 7 LANDSCAPE DMA 3-3 80 B IMPERVIOUS 0.9 72 CONCRETE TOTAL AREA 1,400 o 25 50 100 150 ( IN FEET ) 1 inch = 50 ft. AREA SUMMARY TABLE EXISTING CONDITION POST—CONSTRUCTION CONDITION DIFFERENCE IMPERVIOUS AREA 10,240 SF (0.24 AC) — 8.7% 23,382 SF (0.54 AC) — 18.5% + 13,142 SF PERVIOUS AREA 116,363 (2.67 AC) — 91.91-. 103,221 (2.37 AC) — 81.5% —13,142 SF TOTAL AREA 126,603 SF (2.91 AC) 726,603 SF (2.91 AC) *DMA IS INFEASIBLE TO BE TREATED. HOWEVER, WILL BE INCLUDED FOR BIOFIL TRA TION SIZING TO ACCOUNT FOR STORM WA TER QUALITY AND HMP REQUIREMENTS H\1500\1587.00 Schmidt Design Group - Carlsbad Pork\Engineering — DMA.dwq 1 Pollutant Control Backup\Attachnient la & 07 CCSYA EXHIBIT I'm N BUENA VISTA PARK -; - latitude !' PLANNING & ENGINEERING 9968 Hibert Street 2 Floor, San Diego, CA 92131 Tel 858.751.0633 0 250 500 0OO I IN FEET 1 inch = 500 ft. SDHM 3.1 PROJECT REPORT 1. General Model Information Project Name: 1587 sdhm Site Name: Site Address: City: Report Date: 2/20/2019 Gage: OCEANSID Data Start: 10/01/1959 Data End: 09/30/2004 Timestep: Hourly Precip Scale: 1.000 Version Date: 2019/01/02 POC Thresholds Low Flow Threshold for POC1: 10 Percent of the 2 Year High Flow Threshold for POCI: 10 Year 1587 sdhm 2/20/2019 4:59:11 PM Page 2 Landuse Basin Data Predeveloped Land Use Basin I Bypass: No Ground Water: No Pervious Land Use acre B, NatVeg, Moderate 2.91 Pervious Total 2.91 Impervious Land Use acre Impervious Total 0 Basin Total 2.91 Element Flows To: Surface Interfiow Groundwater 1587 sdhm 2/20/2019 4:59:11 PM Page 3 Mitigated Land Use Basin 1&3 Bypass: No Ground Water: No Pervióus Land Use acre B, NatVeg, Moderate 1.89 Pervious Total. 1.89 Impervious Land Use acre IMPERVIOUS-MOD 0.49 Impervious Total 0.49 Basin Total 2.38 Element Flows To: Surface I nterflow Groundwater Surface Biofilter I Surface Biofllter 1 1587 sdhm 2/20/2019 4:59:11 PM Page 4 Basin 2 Bypass: Yes Ground Water: No Pervious Land Use acre B, NatVeg, Moderate 0.47 Pervious Total 0.47 Impervious Land Use acre IMPERVIOUS-MOD 0.05 Impervious Total 0.05 Basin Total 0.52 Element Flows To: Surface Interfiow Groundwater 1587 sdhm 2/20/2019 4:59:11 PM Page 5 Routing Elements Prede veloped Routing 1587 sdhm 2/20/2019 4:59:11 PM Page 6 Mitigated Routing Biofilter I Bottom Length: Bottom Width: Material thickness of first layer: Material type for first layer: Material thickness of second layer: Material type for second layer: Material thickness of third layer: Material type for third layer: Underdrain used 'Underdrain Diameter (feet): Orifice Diameter (in.): Offset (in.): Flow Through Underdrain (ac-ft.): Total Outflow (ac-ft.): Percent Through Underdrain: Discharge Structure Riser Height: 1 ft. Riser Diameter: 12 in. Element Flows To: Outlet I Outlet 2 50.00 ft. 49.00 ft. 1.5 ESM 0.5 FILTER LAYER I GRAVEL I 0.9 3 20.11 23.44 85.8 Biofilter Hydraulic Table Stage(feet) Area(ac.) Vol ume(ac-ft.) Discharge(cfs) I nfl lt(cfs) 0.0000 0.0562 0.0000 0.0000 0.0000 0.0495 0.0562 0.0008 0.0000 0.0000 0.0989 0.0562 0.0017 0.0000 0.0000 0.1484 0.0562 0.0025 0.0000 0.0000 0.1978 0.0562 0.0033 0.0000 0.0000 0.2473 0.0562 0.0042 0.0000 0.0000 0.2967 0.0562 0.0050 0.0000 0.0000 0.3462 0.0562 0.0058 0.0000 0.0000 0.3956 0.0562 0.0067 0.0000 0.0000 0.4451 0.0562 0.0075 0.0000 0.0000 0.4945 0.0562 0.0083 0.0000 0.0000 0.5440 0.0562 0.0092 0.0000 0.0000 0.5934 0.0562 0.0100 0.0000 0.0000 0.6429 0.0562 0.0108 0.0000 0.0000 0.6923 0.0562 0.0117 0.0000 0.0000 0.7418 0.0562 0.0125 0.0000 0.0000 0.7912 0.0562 0.0134 0.0000 0.0000 0.8407 0.0562 0.0142 0.0000 0.0000 0.8901 0.0562 0.0150 0.0000 0.0000 0.9396 0.0562 0.0159 0.0000 0.0000 0.9890 0.0562 0.0167 0.0000 0.0000 1.0385 0.0562 0.0175 0.0000 0.0000 1.0879 0.0562 0.0184 0.0000 0.0000 1.1374 0.0562 0.0192 0.0000 0.0000 1.1868 0.0562 0.0200 0.0000 0.0000 1.2363 0.0562 0.0209 0.0000 0.0000 1.2857 0.0562 0.0217 0.0000 0.0000 1.3352 0.0562 0.0225 0.0000 0.0000 1.3846 0.0562 0.0234 0.0011 0.0000 1587 sdhm 2/20/2019 4:59:11 PM Page 7 1.4341 0.0562 0.0242 0.0017 0.0000 1.4835 0.0562 0.0250 0.0029 0.0000 1.5330 0.0562 0.0259 0.0035 0.0000 1.5824 0.0562 0.0267 0.0045 0.0000 1.6319 0.0562 0.0275 0.0049 0.0000 1.6813 0.0562 0.0284 0.0057 0.0000 1.7308 0.0562 0.0292 0.0061 0.0000 1.7802 0.0562 0.0300 0.0067 0.0000 1.8297 0.0562 0.0309 0.0070 0.0000 1.8791 0.0562 0.0317 0.0076 0.0000 1.9286 0.0562 0.0325 0.0078 0.0000 1.9780 0.0562 0.0334 0.0083 0.0000 2.0275 0.0562 0.0345 0.0086 0.0000 2.0769 0.0562 0.0357 0.0090 0.0000 2.1264 0.0562 0.0368 0.0093 0.0000 2.1758 0.0562 0.0380 0.0097 0.0000 2.2253 0.0562 0.0391 0.0099 0.0000 2.2747 0.0562 0.0403 0.0103 0.0000 2.3242 0.0562 0.0415 0.0105 0.0000 2.3736 0.0562 0.0426 0.0109 0.0000 2.4231 0.0562 0.0438 0.0110 0.0000 2.4725 0.0562 0.0449 0.0114 0.0000 2.5220 0.0562 0.0461 0.0116 0.0000 2.5714 0.0562 0.0472 0.0117 0.0000 2.6209 0.0562 0.0484 0.0123 0.0000 2.6703 0.0562 0.0495 0.0130 0.0000 2.7198 0.0562 0.0507 0.0138 0.0000 2.7692 0.0562 0.0518 0.0146 0.0000 2.8187 0.0562 0.0530 0.0154 0.0000 2.8681 0.0562 0.0542 0.0161 0.0000 2.9176 0.0562 0.0553 0.0169 0.0000 2.9670 0.0562 0.0565 0.0176 0.0000 3.0000 0.0562 0.0572 0.0365 0.0000 Biofilter Hydraulic Table Stage(feet)Area(ac.)Vol ume(ac-ft.)Discharge(cfs)To Amended(cfs)l nfl lt(cfs) 3.0000 0.0562 0.0572 0.0000 0.0365 0.0000 3.0495 0.0569 0.0600 0.0000 0.0365 0.0000 3.0989 0.0576 0.0629 0.0000 0.0365 0.0000 3.1484 0.0583 0.0657 0.0000 0.0365 0.0000 3.1978 0.0590 0.0686 0.0000 0.0365 0.0000 3.2473 0.0597 0.0716 0.0000 0.0365 0.0000 3.2967 0.0604 0.0745 0.0000 0.0365 0.0000 3.3462 0.0611 0.0775 0.0000 0.0365 0.0000 3.3956 0.0618 0.0806 0.0000 0.0365 0.0000 3.4451 0.0625 0.0836 0.0000 0.0365 0.0000 3.4945 0.0632 0.0867 0.0000 0.0365 0.0000 3.5440 0.0639 0.0899 0.0000 0.0365 0.0000 3.5934 0.0646 0.0931 0.0000 0.0365 0.0000 3.6429 0.0654 0.0963 0.0000 0.0365 0.0000 3.6923 0.0661 0.0995 0.0000 0.0365 0.0000 3.7418 0.0668 0.1028 0.0000 0.0365 0.0000 3.7912 0.0676 0.1061 0.0000 0.0365 0.0000 3.8407 0.0683 0.1095 0.0000 0.0365 0.0000 3.8901 0.0690 0.1129 0.0000 0.0365 0.0000 3.9396 0.0698 0.1163 0.0000 0.0365 0.0000 3.9890 0.0705 0.1198 0.0000 0.0365 0.0000 4.0385 0.0713 0.1233 0.0800 0.0365 0.0000 1587 sdhm 2/20/20194:59:11 PM Page 8 4.0879 0.0721 0.1268 0.2754 0.0365 0.0000 4.1374 0.0728 0.1304 0.5323 0.0365 0.0000 4.1868 0.0736 0.1340 0.8261 0.0365 0.0000 4.2363 0.0744 0.1377 1.1332 0.0365 0.0000 4.2857 0.0751 0.1414 1.4294 0.0365 0.0000 4.3352 0.0759 0.1451 1.6924 0.0365 0.0000 4.3846 0.0767 0.1489 1.9054 0.0365 0.0000 4.4341 0.0775 0.1527 2.0620 0.0365 0.0000 4.4835 0.0783 0.1566 2.1721 0.0365 0.0000 4.5000 0.0786 0.1579 2.2994 0.0365 0.0000 1587 sdhm 2/20/2019 4:59:11 PM Page 9 Surface Biofllter 1 Element Flows To: Outlet I Outlet 2 Biofilter I 1587 sdhm 2/20/20194:59:11 PM Page 10 Duration Flows The Facility PASSED Flow(cfs) Predev Mit Percentage Pass/Fail 0.0468 439 382 87 Pass 0.0603 370 267 72 Pass 0.0738 315 217 68 Pass 0.0873 271 189 69 Pass 0.1007 212 165 77 Pass 0.1142 171 141 82 Pass 0.1277 155 126 81 Pass 0.1412 142 113 79 Pass 0.1547 138 104 75 Pass 0.1682 133 92 69 Pass 0.1817 129 86 66 Pass 0.1952 126 83 65 Pass 0.2087 118 74 62 Pass 0.2222 111 71 63 Pass 0.2356 106 68 64 Pass 0.2491 101 64 63 Pass 0.2626 97 62 63 Pass 0.2761 93 59 63 Pass 0.2896 87 57 65 Pass 0.3031 85 55 64 Pass 0.3166 78 54 69 Pass 0.3301 74 52 70 Pass 0.3436 71 49 69 Pass 0.3570 67 41 61 Pass 0.3705 64 40 62 Pass 0.3840 61 39 63 Pass 0.3975 59 38 64 Pass 0.4110 57 38 66 Pass 0.4245 52 37 71 Pass 0.4380 51 33 64 Pass 0.4515 46 32 69 Pass 0.4650 44 31 70 Pass 0.4785 41 30 73 Pass 0.4919 37 30 81 Pass 0.5054 37 29 78 Pass 0.5189 35 28 80 Pass 0.5324 32 28 87 Pass 0.5459 30 26 86 Pass 0.5594 30 25 83 Pass 0.5729 29 23 79 Pass 0.5864 27 22 81 Pass 0.5999 27 22 81 Pass 0.6134 26 21 80 Pass 0.6268 25 20 80 Pass 0.6403 23 20 86 Pass 0.6538 22 19 86 Pass 0.6673 21 17 80 Pass 0.6808 20 17 85 Pass 0.6943 19 16 84 Pass 0.7078 18 15 83 Pass 0.7213 18 15 83 Pass 0.7348 18 15 83 Pass 0.7482 18 15 83 Pass 1587 sdhm 2/20/2019 4:59:20 PM Page 12 0.7617 18 13 72 Pass 0.7752 15 13 86 Pass 0.7887 15 12 80 Pass 0.8022 15 11 73 Pass 0.8157 14 10 71 Pass 0.8292 13 10 76 Pass 0.8427 12 9 75 Pass 0.8562 12 9 75 Pass 0.8697 12 9 75 Pass 0.8831 10 8 80 Pass 0.8966 10 8 80 Pass 0.9101 10 8 80 Pass 0.9236 10 8 80 Pass 0.9371 10 8 80 Pass 0.9506 10 8 80 Pass 0.9641 10 8 80 Pass 0.9776 10 8 80 Pass 0.9911 10 8 80 Pass 1.0045 9 8 88 Pass 1.0180 9 7 77 Pass 1.0315 9 7 77 Pass 1.0450 9 7 77 Pass 1.0585 8 6 75 Pass 1.0720 6 6 100 Pass 1.0855 6 6 100 Pass 1.0990 6 6 100 Pass 1.1125 5 5 100 Pass 1.1260 5 4 80 Pass 1.1394 5 4 80 Pass 1.1529 5 4 80 Pass 1.1664 5 4 80 Pass 1.1799 5 4 80 Pass 1.1934 5 4 80 Pass 1.2069 5 4 80 Pass 1.2204 5 4 80 Pass 1.2339 5 4 80 Pass 1.2474 5 4 80 Pass 1.2609 5 4 80 Pass 1.2743 5 4 80 Pass 1.2878 4 4 100 Pass 1.3013 4 4 100 Pass 1.3148 4 4 100 Pass 1.3283 4 4 100 Pass 1.3418 4 4 100 Pass 1.3553 4 4 100 Pass 1.3688 4 4 100 Pass 1.3823 4 4 100 Pass 1587 sdhm 2/20/2019 4:59:20 PM Page 13 Water Quality Drawdown Time Results Pond: Biofilter I Days Stage(feet) Percent of Total Run Time I 2.368 1.5658 2 0.000 N/A 3 0.000 N/A 4 0.000 N/A 5 0.000 N/A Maximum Stage: 3.000 Drawdown Time: 0109:24:40 1587 sdhm 2/20/2019 4:59:20 PM Page 14 POC2 POC #2 was not reported because POC must exist in both scenarios and both scenarios must have been run. 1587 sdhm 2/20/2019 4:59:20 PM Page 15 Model Default Modifications Total of 0 changes have been made. PERLND Changes No PERLND changes have been made. IMPLND Changes No IMPLND changes have been made. 1587 sdhm 2/20/2019 4:59:20 PM Page 16 Predeveloped UCI File RUN GLOBAL WWHM4 model simulation START 1959 10 01 END 2004 09 30 RUN INTERP OUTPUT LEVEL 3 0 RESUME 0 RUN 1 IT SYSTEM 1 END GLOBAL FILES <File> <-ID-> WDM 26 1587 sdhm.wdm MESSU 25 Pre1587 sdhm.MES 27 Pre].587 sdhm.L6]. 28 Pre1587 sdhm.L62 30 P0C1587 sdhml.dat END FILES OPN SEQUENCE INGRP INDELT 00:60 PERLND 11 COPY 501 DISPLY 1 END INGRP END OPN SEQUENCE DISPLY DISPLY- INFOl if - #< ---------- Title ----------- >***TRAN PIVL DIG1 FILl 1 Basin 1 MAX END DISPLY-INFO]. END DISPLY COPY TIMESERIES if - if NPT NNN 1 1 1 501 1 1 END TIMESERIES END COPY GENER OPCODE if if OPCD END OPCODE PARM if if END PARM END GENER PERLND GEN- INFO PYR DIG2 FIL2 YRND 1 2 30 9 File Name ------------------------------>*** <PLS >< ------- Name ------- >NBLKS Unit-systems Printer *** if - if User t-series Engl Metr in out 11 B,NatVeg,Moderate 1 1 1 1 27 0 END GEN-INFO Section PWATER*** ACTIVITY <PLS > ************* Active Sections if - if ATMP SNOW PWAT SED PST PWG PQAL MSTL PEST NITR PHOS TRAC 11 0 0 1 0 0 0 0 0 0 0 0 0 END ACTIVITY UN PRINT-INFO <PLS > ***************** Print-flags ***************************** PIVL PYR if - if ATMP SNOW PWAT SED PST PWG PQAL MSTL PEST NITR PHOS TRAC 11 0 0 4 0 0 0 0 0 0 0 0 0 1 9 END PRINT-INFO 1587 sdhm 2/20/2019 4:59:40 PM Page 19 PWAT - PARM1 <PLS > PWATER variable monthly parameter value flags * - # CSNO RTOP UZFG VCS VUZ VNN VIFW VIRC VLE INFC HWT 11 0 1 1 1 0 0 0 0 1 1 0 END PWAT-PARM1 PWAT - PARM2 <PLS > PWATER input info: Part 2 * - * ***FOREST LZSN INFILT LSUR SLSUR KVARY AGWRC 11 0 3.7 0.055 80 0.1 2.5 0.915 END PWAT - PARM2 PWAT- PARM3 <PLS > PWATER input info: Part 3 * - * ***p'fl4)( PETMIN INFEXP INFILD DEEPFR BASETP AGWETP 11 0 0 2 2 0 0.05 0.05 END PWAT - PARM3 PWAT- PARN4 <PLS > PWATER input info: Part 4 * - CEPSC UZSN NSUR INTFW 11 0 0.6 0.04 1 END PWAT- PARM4 MON- LZETPARM <PLS > PWATER input info: Part 3 * - * JAN FEB MAR APR MAY JUN JUL AUG SEP 11 0.4 0.4 0.4 0.4 0.6 0.6 0.6 0.6 0.6 END MON-LZETPARN MON- INTERCEP <PLS > PWATER input info: Part 3 * - * JAN FEB MAR APR MAY JUN JUL AUG SEP 11 0.1 0.1 0.1 0.1 0.06 0.06 0.06 0.06 0.06 END MON-INTERCEP IRC LZETP *** 0.3 0 OCT NOV DEC *** 0.4 0.4 0.4 OCT NOV DEC *** 0.1 0.1 0.1 PWAT - STATE 1 <PLS > * Initial conditions at start of simulation ran from 1990 to end of 1992 (pat 1-11-95) RUN 21 *** * - CEPS SURS UZS IFWS LZS AGWS GWVS 11 0 0 0.01 0 0.4 0.01 0 END PWAT-STATE1 END PERLND IMPLND GEN- INFO <PLS >< -------Name-------> Unit-systems Printer *** * - * User t-series Engi Metr in out END GEN-INFO Section IWATER*** ACTIVITY <PLS > ************* Active Sections * - * ATMP SNOW IWAT SLD IWG IQAL END ACTIVITY PRINT-INFO <ILS > ******** Print-flags ******** PIVL PYR * - * ATMP SNOW IWAT SLD IWG IQAL END PRINT-INFO IWAT- PARM1 <PLS > IWATER variable monthly parameter value flags * - # CSNO RTOP VRS VNN RTLI END IWAT- PARN1 IWAT- PARM2 <PLS > IWATER input info: Part 2 * - LSUR SLSUR NSUR RETSC END IWAT-PARM2 1587 sdhm 2/20/2019 4:59:40 PM Page 20 IWAT- PARM3 <PLS > IWATER input info: Part 3 - # ***PETMAX PETMIN END IWAT-PARM3 IWAT- STATE1 <PLS > *** Initial conditions at start of simulation - RETS SURS END IWAT-STATEI. END IMPLND SCHEMATIC <-Source-> <Name> * Basin l*** PERLND 11 PERLND 11 ******Routing****** END SCHEMATIC <--Area--> <-Target-> MBLK <-factor-> <Name> * Tb1# 2.91 COPY 501 12 2.91 COPY 501 13 NETWORK <-Volume-> <-Grp> <-Member-><--Mult-->Tran <-Target vols> <-Grp> <-Member-> *** <Name> * <Name> # #.c-factor->strg <Name> # # <Name> * # COPY 501 OUTPUT MEAN 1 1 12.1 DISPLY 1 INPUT TIMSER 1 <-Volume-> <-Grp> <-Member-><- -Mult- - >Tran <-Target vols> <-Grp> <-Member-> *** <Name> * <Name> * #<-factor->strg <Name> * * <Name> * * END NETWORK RCHRES GEN- INFO RCHRES Name Nexits Unit Systems Printer * - *<------------------><---> User T-series Engi Metr LKFG in out END GEN-INFO *** Section RCHRES*** ACTIVITY <PLS > ************* Active Sections * - * HYFG ADFG CNFG HTFG SDFG GQFG OXFG NUFG PKFG PHFG END ACTIVITY PRINT-INFO <PLS > ***************** Print-flags ******************* PIVL PYR * - * HYDR ADCA CONS HEAT SED GQL OXRX NUTR PLNK PHCB PIVL PYR END PRINT-INFO HYDR- PARN1 RCHRES Flags for each HYDR Section * - # VC Al A2 A3 ODFVFG for each ODGTFG for each FUNCT for each FG FG FG FG possible exit possible exit possible exit * * * * * * * * * * * * * * *** END HYDR-PARM1 HYDR- PARN2 * - * FTABNO LEN DELTH STCOR KS DBSO ->< -------->< -------->< -------->< -------->< -------->< --------> END HYDR-PARM2 HYDR- INIT RCHRES Initial conditions for each HYDR section *** * - * *** VOL Initial value of COLIND Initial value of OUTDGT ac-ft for each possible exit for each possible exit ->< --------> <---><---><---><---><---> *** END HYDR-INIT END RCHRES 1587 sdhm 2/20/2019 4:59:40 PM Page 21 SPEC-ACTIONS END SPEC-ACTIONS FTABLES END FTABLES EXT SOURCES <-Volume-> <Member> SsysSgap<--Mult-->Tran <-Target vols> <-Grp> <-Member-> *** <Name> # <Name> # tern strg<-factor->strg <Name> * * <Name> * * WDM 2 PREC ENGL 1 PERLND 1. 999 EXTNL PREC WDM 2 PREC ENGL 1 IMPLND 3. 999 EXTNL PREC WDM 1 EVAP ENGL 1. PERLND 3. 999 EXTNL PETINP WDM 1 EVAP ENGL 1 IMPLND 1 999 EXTNL PETINP END EXT SOURCES EXT TARGETS <-Volume-> <-Grp> <-Member-><--Mult-->Tran <-Volume-> <Member> Tsys Tgap Amd <Name> * <Name> * *<-factor->strg <Name> * <Name> tern strg strg*** COPY 501 OUTPUT MEAN 1 1 12.1 WDM 501 FLOW ENGL REPL END EXT TARGETS MASS-LINK <Volume> <-Grp> <-Member-><--Mult--> <Name> <Name> * *<-factor-> MASS-LINK 12 PERLND PWATER SURO 0.083333 END MASS-LINK 12 <Target> <Name> COPY <-Grp> <_Mernber_>*** <Name> * INPUT MEAN MASS-LINK 13 PERLND PWATER IFWO 0.083333 COPY INPUT MEAN END MASS-LINK 13 END MASS-LINK END RUN 1587 sdhm 2/20/2019 4:59:40 PM Page 22 Mitigated UCI File RUN GLOBAL WWHM4 model simulation START 1959 10 01 END RUN INTERP OUTPUT LEVEL 3 0 RESUME 0 RUN 1 END GLOBAL FILES <File> <-ID-> WDM 26 1587 sdhm.wdm MESSU 25 Mit1587 sdhm.MES 27 Mit1587 sdhm.L61 28 Mit1587 sdhm.L62 30 POC1587 sdhml.dat END FILES OPN SEQUENCE 2004 09 30 UNIT SYSTEM 1 FileName ------------------------------- INGRP INDELT 00:60 PERLND 11 IMPLND 2 RCHRES 1 RCHRES 2 COPY 1 COPY 501 COPY 601 DISPLY 1 END INGRP END OPN SEQUENCE DISPLY DISPLY- INFO]. - #<---------- Title ----------- >***TRAN PIVL DIG]. FILl 1 Surface Biofilter 1 MAX END DISPLY-INFOl END DISPLY COPY TIME S ER IE S # * NPT vj*** 1 1 1 501 1 1 601 1 1 END TIMESERIES END COPY GENER OPCODE # * OPCD END OPCODE PARM .# # END PARM END GENER PERLND GEN- INFO. PYR DIG2 FIL2 YRND 1 2 30 9 <PLS >< ------- Name ------- >NBLKS Unit-systems Printer *** * - User t-series Engl Metr in out 11 B,NatVeg,Moderate 1 1 1 1 27 0 END GEN- INFO *** Section PWATER*** ACTIVITY <PLS > ************* Active Sections ***************************** - * ATMP SNOW PWAT SED PST PWG PQAL MSTL PEST NITR PHOS TRAC 11 0 0 1 0 0 0 0 0 0 0 0 0 END ACTIVITY 1587 sdhm 2/20/2019 4:59:40 PM Page 23 PRINT-INFO <PLS > ***************** Print-flags PIVL PYR - # ATMP SNOW PWAT SED PST PWG PQAL MSTL PEST NITR PHOS TRAC 11 0 0 4 0 0 0 0 0 0 0 0 0 1 9 END PRINT-INFO PWAT- PARM1 <PLS > PWATER variable monthly parameter value flags - # CSNO RTOP UZFG VCS VUZ VNN VIFW VIRC VLE INK HWT 11 0 1 1 1 0 0 0 0 1 1 0 END PWAT- PARM1 PWAT- PARM2 <PLS > PWATER input info: Part 2 - * ***FOREST LZSN INFILT LSUR SLSUR KVARY 11 0 3.7 0.055 80 0.1 2.5 END PWAT- PARM2 AGWRC 0.915 PWAT-PARM3 <PLS > PWATER input info: Part 3 * - * ***'fl4)( PETMIN INFEXP INFILD DEEPFR 11 0 0 2 2 0 END PWAT- PARN3 PWAT - PARM4 <PLS > PWATER input info: Part 4 * - # CEPSC UZSN NSUR INTFW IRC 11 0 0.6 0.04 1 0.3 END PWAT - PARM4 MON- LZETPARM <PLS > PWATER input info: Part 3 * - # JAN FEB MAR APR MAY JUN JUL AUG SEP 11 0.4 0.4 0.4 0.4 0.6 0.6 0.6 0.6 0.6 END MON-LZETPARM MON- INTERCEP <PLS > PWATER input info: Part 3 * - # JAN FEB MAR APR MAY JUN JUL AUG SEP 11 0.1 0.1 0.1 0.1 0.06 0.06 0.06 0.06 0.06 END MON-INTERCEP BASETP AGWETP 0.05 0.05 LZETP 0 OCT NOV DEC *** 0.4 0.4 0.4 OCT NOV DEC *** 0.1 0.1 0.1 PWAT- STATE 1 <PLS > *** Initial conditions at start of simulation ran from 1990 to end of 1992 (pat 1-11-95) RUN 21 *** * - * CEPS SURS UZS IFWS LZS AGWS GWVS 11 0 0 0.01 0 0.4 0.01 0 END PWAT-STATE1 END PERLND IMPLND GEN- INFO <PLS >< -------Name------- *- * 2 IMPERVIOUS-MOD END GEN-INFO Section IWATER*** Unit-systems Printer *** User t-series Engl Metr in out 1 1 1 27 0 ACTIVITY <PLS > ************* Active Sections * - * ATMP SNOW IWAT SLD IWG IQAL 2 0 0 1 0.0 0 END ACTIVITY PRINT-INFO <ILS > ******** Print-flags ******** PIVL PYR * - * ATMP SNOW IWAT SLD IWG IQAL 2 0 0 4 0 0 0 1 9 END PRINT-INFO IWAT-PARM1 1587 sdhm 2/20/2019 4:59:40 PM Page 24 <PLS > IWATER variable monthly parameter value flags - * CSNO RTOP '/RS VNN RTLI 2 0 0 0 0 1 END IWAT-PARM1 IWAT-PARM2 <PLS > IWATER input info: Part 2 * - * LSUR SLSUR NSUR RETSC 2 100 0.1 0.011 0.08 END IWAT- PARM2 IWAT-PARM3 <PLS > IWATER input info: Part 3 * - * ***PET114AX PETMIN 2 0 0 END IWAT-PARM3 IWAT- STATE1 <PLS > Initial conditions at start of simulation * - RETS SURS 2 0 0 END IWAT-STATE1 END IMPLND SCHEMATIC <-Source-> <--Area--> <-Target-> MBLK <Name> * <-factor-> <Name> * Tb1# *** Basin 1&3*** PERLND 11 1.89 RCHRES 1 2 PERLND 11 1.89 RCHRES 1 3 IMPLND 2 0.49 RCHRES 1 5 Basin 2*** PERLND 11 0.47 COPY 501 12 PERLND 11 0.47 COPY 601 12 PERLND 11 0.47 COPY 501 13 PERLND 11 0.47 COPY 601 13 IMPLND 2 0.05 COPY 501 15 IMPLND 2 0.05 COPY 601 15 ******Routing****** PERLND 11 1.89 COPY 1 12 IMPLND 2 0.49 COPY 1 15 PERLND 11 1.89 COPY 1 13 RCHRES 1 1 RCHRES 2 8 RCHRES 2 1 COPY 501 16 RCHRES 1 1 COPY 501 17 END SCHEMATIC NETWORK <-Volume-> <-Grp> <-Member-><--Mult-->Tran <-Target vols> <-Grp> <-Member-> *** <Name> * <Name> * *<-factor->strg <Name> * * <Name> * * COPY 501 OUTPUT MEAN 1 1 12.1 DISPLY 1 INPUT . TIMSER 1 <-Volume-> <-Grp> <-Member-><--Mult-->Tran <-Target vols> <-Grp> <-Member-> *** <Name> * <Name> * *<-factor->strg <Name> * * <Name> * * END NETWORK RCHRES GEN- INFO RCHRES Name Nexits Unit Systems Printer * - *<------------------><---> User T-series Engl Metr LKFG in out *** 1 Surface Biofilte-006 3 1 1 1 28 0 1 2 Biofilter 1 1 1 1 1 28 0 1 END GEN-INFO *** Section RCHRES*** 1587 sdhm 2/20/2019 4:59:40 PM Page 25 ACTIVITY <PLS > *** Active Sections it - it HYFG ADFG CNFG HTFG SDFG GQFG OXFG NIJFG PKFG PHFG 1 1 0 0 0 0 0 0 0 0 0 2 1 0 0 0 0 0 0 0 0 0 END ACTIVITY PRINT-INFO <PLS > ***************** Print-flags **'*************** PIVL PYR it - it HYDR ADCA CONS HEAT SED GQL OXRX NUTR PLNK PHCB PIVL PYR 1 4 0 0 0 0 0 0 0 0 0 1 9 2 4 0 0 0 0 0 0 0 0 0 ]. 9 END PRINT-INFO HYDR- PARM1 RCHRES Flags for each HYDR Section * - * VC Al A2 A3 ODFVFG for each ODGTFG for each FUNCT for each FG FG FG FG possible exit possible exit, possible exit * * * * * * * * * * * * * * *** 1 '0100 45600 00000 22222 2 0100 40000 00000 22222 END HYDR-PARM1 HYDR- PARN2 it - it FTABNO LEN DELTH STCOR KS DB50 ->< -------->< -------->< -------->< -------->< -------->< --------> 1 1 0.01 0.0 0.0 0.0 0.0 2 2 0.01 0.0 0.0 0.5 0.0 END HYDR-PARM2 HYDR- INIT RCHRES Initial conditions for each HYDR section *** - VOL Initial value of COLIND Initial value of OUTDGT *** ac-ft for each possible exit for each possible exit -> --------> <---><---><---><---><---> *** 1 0 4.0 5.0 6.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2 0 4.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 END HYDR-INIT END RCHRES SPEC-ACTIONS END SPEC-ACTIONS FTABLES FTABLE 2 62 4 Depth Area Volume Outflowl Velocity Travel Time*** (ft) (acres) (acre-ft) (cfs) (ft/sec) (Minutes) *** 0.000000 0.056244 0.000000 0.000000 0.049451 0.056244 0.000834 0.000000 0.098901 0.056244 0.001669 0.000000 0.148352 0.056244 0.002503 0.000000 0.197802 0.056244 0.003338 0.000000 0.247253 0.056244 0.004172 0.000000 0.296703 0.056244 0.005006 0.000000 0.346154 0.056244 0.005841 0.000000 0.395604 0.056244 0.006675 0.000000 0.445055 0.056244 0.007510 0.000000 0.494505 0.056244 0.008344 0.000000 0.543956 0.056244 0.009178 0.000000 0.593407 0.056244 0.010013 0.000000 0.642857 0.056244 0.010847 0.000000 0.692308 0.056244 0.011682 0.000000 0.741758 0.056244 0.012516 0.000000 0.791209 0.056244 0.013350 0.000000 0.840659 0.056244 0.014185 0.000000 0.890110 0.056244 0.015019 0.000000 0.939560 0.056244 0.015853 0.000000 0.989011 0.056244 0.016688 0.000000 1.038462 0.056244 0.017522 0.000000 1.087912 0.056244 0.018357 0.000000 1.137363 0.056244 0.019191 0.000000 1587 sdhm 2/20/2019 4:59:40 PM Page 26 1.186813 0.056244 0.020025 0.000000 1.236264 0.056244 0.020860 0.000000 1.285714 0.056244 0.021694 0.000000 1.335165 0.056244 0.022529 0.000000 1.384615 0.056244 0.023363 0.001113 1.434066 0.056244 0.024197 0.001670 1.483516 0.056244 0.025032 0.002904 1.532967 0.056244 0.025866 0.003521 1.582418 0.056244 0.026701 0.004465 1.631868 0.056244 0.027535 0.004938 1.681319 0.056244 0.028369 0.005686 1.730769 0.056244 0.029204 0.006060 1.780220 0.056244 0.030038 0.006689 1.829670 0.056244 0.030873 0.007003 1.879121 0.056244 0.031707 0.007553 1.928571 0.056244 0.032541 0.007828 1.978022 0.056244 0.033376 0.008324 2.027473 0.056244 0.034530 0.008572 2.076923 0.056244 0.035684 0.009026 2.126374 0.056244 0.036838 0.009254 2.175824 0.056244 0.037993 0.009677 2.225275 0.056244 0.039147 0.009888 2.274725 0.056244 0.040301 0.010286 2.324176 0.056244 0.041455 0.010484 2.373626 0.056244 0.042610 0.010860 2.423077 0.056244 0.043764 0.011047 2.472527 0.056244 0.044918 0.011405 2.521978 0.056244 0.046072 0.011583 2.571429 0.056244 0.047227 0.011729 2.620879 0.056244 0.048381 0.012266 2.670330 0.056244 0.049535 0.012991 2.719780 0.056244 0.050689 0.013782 2.769231 0.056244 0.051844 0.014583 2.818681 0.056244 0.052998 0.015369 2.868132 0.056244 0.054152 0.016131 2.917582 0.056244 0.055306 0.016868 2.967033 0.056244 0.056461 0.017586 3.000000 0.056244 0.060243 0.036451 END FTABLE 2 FTABLE 1 32 6 Depth Area Volume 0utf1ow1 Outflow2 outflow 3 Velocity Travel Time*** (ft) (acres) (acre-ft) (cfs) (cfs) (cfs) (ft/sec) (Minutes) *** 0.000000 0.056244 0.000000 0.000000 0.000000 0.000000 0.049451 0.056921 0.002798 0.000000 0.036451 0.000000 0.098901 0.057601 0.005630 0.000000 0.036451 0.000000 0.148352 0.058285 0.008495 0.000000 0.036451 0.000000 0.197802 0.058974 0.011394 0.000000 0.036451 0.000000 0.247253 0.059666 0.014328 0.000000 0.036451 0.000000 0.296703 0.060363 0.017295 0.000000 0.036451 0.000000 0.346154 0.061064 0.020298 0.000000 0.036451 0.000000 0.395604 0.061768 0.023335 0.000000 0.036451 0.000000 0.445055 0.062477 0.026407 0.000000 0.036451 0.000000 0.494505 0.063190 0.029514 0.000000 0.036451 0.000000 0.543956 0.063906 0.032656 0.000000 0.036451 0.000000 0.593407 0.064627 0.035834 0.000000 0.036451 0.000000 0.642857 0.065352 0.039048 0.000000 0.036451 0.000000 0.692308 0.066081 0.042298 0.000000 0.036451 0.000000 0.741758 0.066814 0.045584 0.000000 0.036451 0.000000 0.791209 0.067551 0.048906 0.000000 0.036451 0.000000 0.840659 0.068292 0.052265 0.000000 0.036451 0.000000 0.890110 0.069037 0.055660 0.000000 0.036451 0.000000 0.939560 0.069786 0.059093 0.000000 0.036451 0.000000 0.989011 0.070539 0.062562 0.000000 0.036451 0.000000 1.038462 0.071296 0.066069 0.079976 0.036451 0.000000 1.087912 0.072058 0.069614 0.275387 0.036451 0.000000 1.137363 0.072823 0.073196 0.532289 0.036451 0.000000 1.186813 0.073592 0.076816 0.826090 0.036451 0.000000 1587 sdhm 2/20/2019 4:59:40 PM Page 27 1.236264 0.074366 0.080474 1.285714 0.075143 0.084171 1.335165 0.075924 0.087906 1.384615 0.076710 0.091680 1.434066 0.077499 0.095493 1.483516 0.078293 0.099345 1.500000 0.078558 0.100638 END FTABLE 1 END FTABLES 1.133165 0.036451 0.000000 1.429395 0.036451 0.000000 1.692395 0.036451 0.000000 1.905359 0.036451 0.000000 2.061968 0.036451 0.000000 2.172110 0.036451 0.000000 2.299375 0.036451 0.000000 EXT SOURCES <-Volume-> <Member> SsysSgap<- -Mult-->Tran <-Target vols> <-Grp> <-Member-> *** <Name> * <Name> * tern strg.c-factor->strg <Name> # * <Name> # * WDM 2 PREC ENGL 1 PERLND 1 999 EXTNL PREC WDM 2 PREC ENGL 1 IMPLND 1 999 EXTNL PREC WDM 1 EVAP ENGL 1 PERLND 1 999 EXTNL PETINP WDM 1 EVAP ENGL 1 IMPLND 1 999 EXTNL PETINP WDM 2 PREC ENGL 1 RCHRES 1 EXTNL PREC WDM 1 EVAP ENGL 0.5 RCHRES 1 EXTNL POTEV WDM 1 EVAP ENGL 0.7 RCHRES 2 EXTNL POTEV END EXT SOURCES EXT TARGETS <-Volume-> <-Grp> <-Member-><--Mult-->Tran <-Volume-> <Member> Tsys Tgap Amd <Name> * <Name> # *<-factor->strg <Name> # <Name> tem strg strg*** RCHRES 2 HYDR RO 1 1 1 WDM 1000 FLOW ENGL REPL RCHRES 2 HYDR STAGE 1 1 1 WDM 1001 STAG ENGL REPL RCHRES 1 HYDR STAGE 1 1 1 WDM 1002 STAG ENGL REPL RCHRES 1 HYDR 0 1 1 1 WDM 1003 FLOW ENGL REPL COPY 1 OUTPUT MEAN 1 1 12.1 WDM 701 FLOW ENGL REPL COPY 501 OUTPUT MEAN 1 1 12.1 WDM 801 FLOW ENGL REPL COPY 601 OUTPUT MEAN 1 1 12.1 WDM 901 FLOW ENGL REPL END EXT TARGETS MASS-LINK <Volume> <-Grp> <-Member-><--Mult--> <Name> <Name> * #<-f actor-> MASS-LINK 2 PERLND PWATER SURO 0.083333 END MASS-LINK 2 <Target> <Name> RCHRES <-Grp> <_Member_>*** <Name> # INFLOW IVOL MASS-LINK 3 PERLND PWATER IFWO END MASS-LINK 3 MASS-LINK 5 IMPLND IWATER SURO END MASS-LINK 5 MASS-LINK 8 RCHRES OFLOW OVOL END MASS-LINK 8 MASS-LINK 12 PERLND PWATER SURO END MASS-LINK 12 MASS-LINK 13 PERLND PWATER IFWO END MASS-LINK 13 MASS-LINK 15 IMPLND IWATER SURO END MASS-LINK 15 MASS-LINK 16 RCHRES ROFLOW END MASS-LINK 16 0.083333 RCHRES 0.083333 RCHRES 2 RCHRES 0.083333 COPY 0.083333 COPY 0.083333 COPY COPY INFLOW IVOL INFLOW IVOL INFLOW IVOL INPUT MEAN INPUT MEAN INPUT MEAN 1587 sdhm 2/20/2019 4:59:40 PM Page 28 MASS-LINK 17 RCHRES OFLOW OVOL 1 COPY INPUT MEAN END MASS-LINK 17 END MASS-LINK END RUN 1587 sdhm 2/20/2019 4:59:40 PM Page 29 Predeveloped HSPF Message File 1587 sdhm 2/20/2019 4:59:40 PM Page 30 Mitigated HSPF Message File 1587 sdhm 2/20/2019 4:59:40 PM Page 31 Disclaimer Legal Notice This program and accompanying documentation are provided 'as-is' without warranty of any kind. The entire risk regarding the performance and results of this program is assumed by End User. Clear Creek Solutions Inc. and the governmental licensee or sublicensees disclaim all warranties, either expressed or implied, including but not limited to implied warranties of program and accompanying documentation. In no event shall Clear Creek Solutions Inc. be liable for any damages whatsoever (including without limitation to damages for loss of business profits, loss of business information, business interruption, and the like) arising out of the use of, or inability to use this program even if Clear Creek Solutions Inc. or their authorized representatives have been advised of the possibility of such damages. Software Copyright© by: Clear Creek Solutions, Inc. 2005-2019; All Rights Reserved. Clear Creek Solutions, Inc. 6200 Capitol Blvd. Ste F Olympia, WA. 98501 Toll Free 1(866)943-0304 Local (360)943-0304 www.clearcreeksolutions.com 1587 sdhm 2/20/2019 4:59:40 PM Page 32 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) Z How to access the structural BMP(s) to inspect and perform maintenance Z 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 BMP(s) 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 requires, posts or other marking shall be indicated and described on structural BMP plans.) Z 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 Chapter 7: Long Term Operation and Maintenance TABLE 7-3. Maintenance Indicators and Actions for Vegetated BMPs Accumulation of sediment, litter, or Remove and properly dispose of accumulated materials, without debris damage to the vegetation. Poor vegetation establishment Re-seed, re-plant, or re-establish vegetation per original plans. Overgrown vegetation Mow or trim as appropriate, but not less than the design height of the vegetation per original plans when applicable (e.g. a vegetated swale may require a minimum vegetation height). Erosion due to concentrated irrigation Repair/re-seed/re-plant eroded areas and adjust the irrigation flow system. Erosion due to concentrated storm Repair/re-seed/re-plant eroded areas, and make appropriate water runoff flow corrective measures such as adding erosion control blankets, adding stone at flow entry points, or minor re-grading to restore proper drainage according to the original plan. If the issue is not corrected by restoring the BMP to the original plan and grade, The County must be contacted prior to any additional repairs or reconstruction. Standing water in vegetated swales Make appropriate corrective measures such as adjusting irrigation system, removing obstructions of debris or invasive vegetation, loosening or replacing top soil to allow for better infiltration, or minor re-grading for proper drainage. If the issue is not corrected by restoring the BMP to the original plan and grade, County staff in the Watershed Protection Program must be contacted prior to any additional repairs or reconstruction. Standing water in bioretention, Make appropriate corrective measures such as adjusting irrigation biofiltration with partial retention, or system, removing obstructions of debris or invasive vegetation, biofiltration areas, or flow-through clearing underdrains (where applicable), or repairing/replacing planter boxes for longer than 96 hours clogged or compacted soils. following a storm event* Obstructed inlet or outlet structure Clear obstructions. Damage to structural components such Repair or replace as applicable. as weirs, inlet or outlet structures *These BMPs typically include a surface ponding layer as part of their function which may take 96 hours to drain following a storm event. 7-14 Effective February 26, 2016 BF-1 Biofiltration BMP MAINTENANCE FACT SHEET FOR STRUCTURAL BMP BF-1 BIOFILTRATION Biofiltratlon facilities are vegetated surface water systems that filter water through vegetation, and soil or engineered media prior to discharge via underdrain or overflow to the downstream conveyance system. Biofiltration facilities have limited or no infiltration. They are typically designed to provide enough hydraulic head to move flows through the underdrain connection to the storm drain system. Typical biofiltration components include: Inflow distribution mechanisms (e.g., perimeter flow spreader or filter strips) Energy dissipation mechanism for concentrated inflows (e.g., splash blocks or riprap) Shallow surface ponding for captured flows Side slope and basin bottom vegetation selected based on climate and ponding depth Non-floating mulch layer Media layer (planting mix or engineered media) capable of supporting vegetation growth Filter course layer consisting of aggregate to prevent the migration of fines into uncompacted native soils or the aggregate storage layer Aggregate storage layer with underdrain(s) Impermeable liner or uncompacted native soils at the bottom of the facility Overflow structure Normal Expected Maintenance Biofiltration requires routine maintenance to: remove accumulated materials such as sediment, trash or debris; maintain vegetation health; maintain infiltration capacity of the media layer; replenish mulch; and maintain integrity of side slopes, inlets, energy dissipators, and outlets. A summary table of standard inspection and maintenance indicators is provided within this Fact Sheet. Non-Standard Maintenance or BMP Failure If any of the following scenarios are observed, the BMP is not performing as intended to protect downstream waterways from pollution and/or erosion. Corrective maintenance, increased inspection and maintenance, BMP replacement, or a different BMP type will be required. The BMP is not drained between storm events. Surface ponding longer than approximately 24 hours following a storm event may be detrimental to vegetation health, and surface ponding longer than approximately 96 hours following a storm event poses a risk of vector (mosquito) breeding. Poor drainage can result from clogging of the media layer, filter course, aggregate storage layer, underdrain, or outlet structure. The specific cause of the drainage issue must be determined and corrected. Sediment, trash, or debris accumulation greater than 25% of the surface ponding volume within one month. This means the load from the tributary drainage area is too high, reducing BMP function or clogging the BMP. This would require pretreatment measures within the tributary area draining to the BMP to intercept the materials. Pretreatment components, especially for sediment, will extend the life of components that are more expensive to replace such as media, filter course, and aggregate layers. Erosion due to concentrated storm water runoff flow that is not readily corrected by adding erosion control blankets, adding stone at flow entry points, or minor re-grading to restore proper drainage according to the original plan. If the issue is not corrected by restoring the BMP to the original plan and grade, the [City Engineer] shall be contacted prior to any additional repairs or reconstruction. BF-1 Page 1 of 11 January 12, 2017 BF-1 Biofiltration Other Special Considerations Biofiltration is a vegetated structural BMP. Vegetated structural BMPs that are constructed in the vicinity of, or connected to, an existing jurisdictional water or wetland could inadvertently result in creation of expanded waters or wetlands. As such, vegetated structural BMPs have the potential to come under the jurisdiction of the United States Army Corps of Engineers, SDRWQCB, California Department of Fish and Wildlife, or the United States Fish and Wildlife Service. This could result in the need for specific resource agency permits and costly mitigation to perform maintenance of the structural BMP. Along with proper placement of a structural BMP, routine maintenance is key to preventing this scenario. BF-1 Page 2ofll January 12, 2017 BF-1 Biofiltration SUMMARY OF STANDARD INSPECTION AND MAINTENANCE FOR BF-1 BIOFILTRATION 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 Typical Maintenance Frequency Accumulation of sediment, litter, or debris Remove and properly dispose of accumulated materials, Inspect monthly. If the BMP is 25% full* or more in without damage to the vegetation or compaction of the one month, increase inspection frequency to monthly media layer. plus after every 0.1-inch or larger storm event. Remove any accumulated materials found at each inspection. - Obstructed Inlet or outlet structure Clear blockage. Inspect monthly and after every 0.5-inch or larger storm event. Remove any accumulated materials found at each inspection. Damage to structural components such as weirs, inlet or Repair or replace as applicable Inspect annually. outlet structures Maintenance when needed. Poor vegetation establishment Re-seed, re-plant, or re-establish vegetation per original Inspect monthly. plans. Maintenance when needed. Dead or diseased vegetation Remove dead or diseased vegetation, re-seed, re-plant, Inspect monthly. or re-establish vegetation per original plans. Maintenance when needed. Overgrown vegetation Mow or trim as appropriate. Inspect monthly. Maintenance when needed. 2/3 of mulch has decomposed, or mulch has been Remove decomposed fraction and top off with fresh Inspect monthly. removed mulch to a total depth of 3 inches. Replenish mulch annually, or more frequently when needed based on inspection. "25% full" is defined as Y4 of the depth from the design bottom elevation to the crest of the outflow structure (e.g., if the height to the outflow opening is 12 inches from the bottom elevation, then the materials must be removed when there is 3 inches of accumulation —this should be marked on the outflow structure). BF-1 Page 3 of 11 January 12, 2017 BF-1 Biofiltration SUMMARY OF STANDARD INSPECTION AND MAINTENANCE FOR BF-1 BIOFILTRATION (Continued from previous page) Threshold/Indicator Maintenance Action Typical Maintenance Frequency Erosion due to concentrated irrigation flow Repair/re-seed/re-plant eroded areas and adjust the Inspect monthly. irrigation system. Maintenance when needed. Erosion due to concentrated storm water runoff flow Repair/re-seed/re-plant eroded areas, and make Inspect after every 0.5-inch or larger storm event. If appropriate corrective measures such as adding erosion erosion due to storm water flow has been observed, control blankets, adding stone at flow entry points, or increase inspection frequency to after every 0.1-inch minor re-grading to restore proper drainage according or larger storm event. to the original plan. If the Issue is not corrected by Maintenance when needed. If the issue is not restoring the BMP to the original plan and grade, the corrected by restoring the BMP to the original plan [City Engineer] shall be contacted prior to any additional and grade, the (City Engineer) shall be contacted prior repairs or reconstruction, to any additional repairs or reconstruction. Standing water In BMP for longer than 24 hours Make appropriate corrective measures such as adjusting Inspect monthly and after every 0.5-inch or larger following a storm event irrigation system, removing obstructions of debris or storm event. If standing water is observed, increase Surface ponding longer than approximately 24 hours invasive vegetation, clearing underdrains, or inspection frequency to after every 0.1-inch or larger following a storm event may be detrimental to repairing/replacing clogged or compacted soils. storm event. vegetation health Maintenance when needed. Presence of mosquitos/larvae If mosquitos/larvae are observed: first, immediately Inspect monthly and after every 0.5-inch or larger remove any standing water by dispersing to nearby storm event. If mosquitos are observed, increase For images of egg rafts, larva, pupa, and adult landscaping; second, make corrective measures as inspection frequency to after every 0.1-inch or larger mosquitos, see applicable to restore BMP drainage to prevent standing storm event. http://www.mosQuito.org/biology water. Maintenance when needed. If mosquitos persist following corrective measures to remove standing water, or if the BMP design does not meet the 96-hour drawdown criteria due to release rates controlled by an orifice Installed on the underdrain, the [City Engineer] shall be contacted to determine a solution. A different BMP type, or a Vector Management Plan prepared with concurrence from the County of San Diego Department of Environmental Health, may be required. Underdrain clogged Clear blockage. Inspect if standing water is observed for longer than 24-96 hours following a storm event. Maintenance when needed. BF-1 Page 4 of 11 January 12, 2017 BF-1 Biofiltration References American Mosquito Control Association. http://www.mosciuito.org] California Storm Water Quality Association (CASQA). 2003. Municipal BMP Handbook. https://www.casga.orgJresóu rces/bmr,-handbooks/municipal-bmp-handbook County of San Diego. 2014. Low Impact Development Handbook. http://www.sandiegocou nty.gov/content/sdc/dpw/watersheds/susmp/lid.html San Diego County Copermittees. 2016. Model BMP Design Manual, Appendix E, Fact Sheet BF-1. http://www.proiectcleanwater.org/index.php?option=com content&view=article&id=250& Item id=220 BF-1 Page sofll January 12, 2017 BE-]. Biofiltration Page Intentionally Blank for Double-Sided Printing BF-1 Page 6of11 January 12, 2017 Biofiltration Date: Inspector: I BMP ID No.: Permit No.: APN(s): Property / Development Name: Responsible Party Name and Phone Number: Property Address of BMP: Responsible Party Address: INSPECTION AND MAINTENANCE CHECKLIST FOR BF-1 BIOFILTRATION PAGE 1 of 5 Threshold/Indicator Maintenance Recommendation Date Description of Maintenance Conducted Accumulation of sediment, litter, or debris 0 Remove and properly dispose of Maintenance Needed? accumulated materials, without damage to the vegetation DYES N 0 0 0 If sediment, litter, or debris accumulation D N/A exceeds 25% of the surface ponding volume within one month (25% full*), add a forebay or other pre-treatment measures within the tributary area draining to the BMP to intercept the materials. D Other/ Comments: Poor vegetation establishment D Re-seed, re-plant, or re-establish Maintenance Needed? vegetation per original plans DYES 0 Other/ Comments: 0 N D N/A "25% full" is defined as 9 of the depth from the design bottom elevation to the crest of the outflow structure (e.g., if the height to the outflow opening is 12 inches from the bottom elevation, then the materials must be removed when there is 3 inches of accumulation —this should be marked on the outflow structure). BF-1 Page 7 of 11 January 12, 2017 BF-1 Biofiltration Date: Inspector: I BMP ID No.: Permit No.: APN(s): INSPECTION AND MAINTENANCE CHECKLIST FOR BF-1 BIOFILTRATION PAGE 2 of S Threshold/Indicator Maintenance Recommendation Date Description of Maintenance Conducted Dead or diseased vegetation 0 Remove dead or diseased vegetation, re- Maintenance Needed? seed, re-plant, or re-establish vegetation per original plans 0 YES 0 Other/ Comments: 0 NO o N/A Overgrown vegetation 0 Mow or trim as appropriate Maintenance Needed? 0 Other / Comments: DYES D NO D N/A 2/3 of mulch has decomposed, or mulch has 0 Remove decomposed fraction and top off been removed with fresh mulch to a total depth of 3 Maintenance Needed? inches DYES 0 Other/ Comments: 0 N ON/A BF-1 Page 8 o 11 January 12, 2017 BF-1 Biofiltration Date: Inspector: I BMP ID No.: Permit No.: APN(s): INSPECTION AND MAINTENANCE CHECKLIST FOR BF-1 BIOFILTRATION PAGE 3 of 5 Threshold/Indicator Maintenance Recommendation Date Description of Maintenance Conducted Erosion due to concentrated Irrigation flow 0 Repair/re-seed/re-plant eroded areas and Maintenance Needed? adjust the irrigation system DYES 0 Other/ Comments: C3 NO D N/A Erosion due to concentrated storm water runoff 0 Repair/re-seed/re-plant eroded areas, flow and make appropriate corrective Maintenance Needed? measures such as adding erosion control blankets, adding stone at flow D YES entry points, or minor re-grading to NO restore proper drainage according to N/A the original plan D If the issue is not corrected by restoring the BMP to the original plan and grade, the [City Engineer] shall be contacted prior to any additional repairs or reconstruction 0 other / Comments: BF-1 Page 9 of 11 January 12, 2017 BF-].• Biofiltration Date: Inspector: I BMP ID No.: Permit No.: APN(s): INSPECTION AND MAINTENANCE CHECKLIST FOR BF-1 BIOFILTRATION PAGE 4 of S Threshold/Indicator Maintenance Recommendation Date Description of Maintenance Conducted Obstructed Inlet or outlet structure 0 Clear blockage Maintenance Needed? 0 Other/ Comments: DYES El NO o N/A Underdrain clogged (inspect underdrain if 0 Clear blockage standing water is observed for longer than 24-96 hours following a storm event) D Other/ Comments: Maintenance Needed? DYES 0 N DN/A Damage to structural components such as weirs, 0 Repair or replace as applicable inlet or outlet structures 0 Other/ Comments: Maintenance Needed? DYES 0 N 0 N/A BF-1 Page 10 of 11 January 12, 2017 BF-1 Biofiltration Date: Inspector: I BMP ID No.: Permit No.: APN(s): INSPECTION AND MAINTENANCE CHECKLIST FOR BF-1 BIOFILTRATION PAGE 5 of 5 Threshold/Indicator Maintenance Recommendation Date Description of Maintenance Conducted Standing water in BMP for longer than 24-96 0 Make appropriate corrective measures hours following a storm event such as adjusting irrigation system, Surface ponding longer than approximately 24 removing obstructions of debris or hours following a storm event may be invasive vegetation, clearing detrimental to vegetation health underdrains, or repairing/replacing clogged or compacted soils Maintenance Needed? Other / Comments: YES 11 NO N/A Presence of mosquitos/larvae 0 Apply corrective measures to remove standing water in BMP when standing For images of egg rafts, larva, pupa, and adult water occurs for longer than 24-96 mosquitos, see hours following a storm event. htto://www.mosguito.org/biology Other / Comments: Maintenance Needed? DYES D NO D N/A Surface ponding longer than approximately 24 hours following a storm event may be detrimental to vegetation health, and surface ponding longer than approximately 96 hours following a storm event poses a risk of vector (mosquito) breeding. Poor drainage can result from clogging of the media layer, filter course, aggregate storage layer, underdrain, or outlet structure. The specific cause of the drainage issue must be determined and corrected. **If mosquitos persist following corrective measures to remove standing water, or if the BMP design does not meet the 96-hour drawdown criteria due to release rates controlled by an orifice installed on the underdrain, the [City Engineer] shall be contacted to determine a solution. A different BMP type, or a Vector Management Plan prepared with concurrence from the County of San Diego Department of Environmental Health, may be required. BF-1 Page 11 of 11 January 12, 2017 ATTACHMENT 4 City standard Single Sheet BMP (SSBMP) Exhibit LEVEL BENCH IF TOP OF RISER ADJACENT TO FILL SLOPING GRA 2' MIN. I AROUND VELMOUND PIPE CA TCH BASIN SIZE PER PLAN BASIN 1 ELE VA liON (D 2' MIN. S. LEVEL BENCH IF ADJACENT TO FILL SLOPING ,,- 6" MIN. FREEBOARD suo - - (DNA71VE PLANTING 6" CLEAN-OUT PORT IMPERMEABLE LINER 6 6" SUB-DRAIN, (DRAIN BOTTOM BASIN TO UNDERGROUND PIPE SYSTEM) 12" MIN 18" AMENDED IMPER A SOIL MIN \j LINER G) BIORETENTION NOTES pill 11111,01 121 NINE %*..b ss. EMEN6601. 2" GRAVEL STORAGE LA YER. OUTLET PIPE PER PLAN TO STORM DRAIN 6" SUB-DRAIN KD "—IMPERMEABLE LINER () THREADED PVC CAP KITH DRILLED 0.9" LOW FLOW ORIFICE, SEE DETAIL 4 / SHEET C-2.0 THE 18' SOIL LAYER (PLANTING LAYER) SHALL BE COMPRISED OF A MIX17JRE OF WASHED SAND (70-857.) AND COMPOST OR AL TERNA 11W ORGANIC AMENDMENT (15-30%) AND SHALL MEET ASTM C33 STANDARDS. 2 THE 12" STORAGE LAYER SHALL BE COMPRISED OF 3/4" GRA VEL. GRA VEL STORAGE LAYER SHALL CONFORM TO THE STANDARD SPEC'IFIA liON PER APPENDIX F.5 OF THE CITY OF SAN DIEGO STORM WA TER STANDARDS MANUAL AND SHALL CONSIST OF 6" FILTER COURSE OVER 12" OF CLEAN WASHED ASTM #57 OPEN GRADED STONE. FILTER COURSE SHALL CONS/ST OF 3" LAYER OF CLEAN WASHED ASTM 33 FINE AGGREGATE SAND OVERLYING A 3" LAYER OF ASTM NO 8 STONE. PLAN 77NG TO BE A MIX OF NA liVE GRASS SPEC/ES, SPACED 18" 0. C. LINE W IN 30 MIL IMPERMEABLE HOPE OR PVC MEMBRANE PER GEO TECHNICAL RECOMMENDA 77 ON. FINISH GRADE OF THE FACILITY IS TO BE FLAT ®BOTTOM OF BASIN SHALL DRAIN TOWARD SUB-DRAIN PIPE AND HAVE A MAXIMUM 2% SLOPE. I A A I:][s]Ill:l[sII:!1Il 7 BMP TABLE BMP ID # BMP TYPE [ SYMBOL CASQA NO. QUANTITY DRAWING NO. j SHEET NO.(S) INSPECTION FREQUENCY [ MAINTENANCE * FREQUENCY TREATMENT CONTROL BIOFV..TRATION oil AREA TC-32 2.410 SF. 521-IA C-3,0 QUARTERLY I SEMI-ANNUALLY LOW IMPACT DESIGN (L.I.D.) __ ________ ________ ______= : VEGETATIVE TC-30 5.230 SF. 521-lA J C-3.0 - ANNUALLY MONTHLY SOURCE CONTROL BMP SIGNAGE (SEE NOTE 1) N/A TC-30 1 EA. 521-1A C-3.0 ONSIrE STORM DRAIN INLETS SC-A 3 EA. 521-1A C-3.0 LANSCAPE/OUTDOOR PESTICIDE USE J j TC-30 95.954 SF. 521-1A C-3.0 PLAZAS, SIDEWALKS, & PARKING LOTS I 1 TC-30 16.563 SF. 521-IA C-3.0 _',. _' II _-y- L •i!__ nrY RESPONOBLE1FOR1 NAME CITY OF CARLSBAD PARKS MAIN7ENANCE NOTE: 1. INSTALL DURABLE SIGN IN EACH BIOFILTRA liON BASIN THAT READS "PERMANENT WATER QUALITY TREATMENT FACILITY. KEEPING OUR WASTEWATER CLEAN. MAINTAIN WITH CARE. NO MODIFICATIONS WITHOUT AGENCY APPROVAL." OR SIMILAR. PLAN PREPARED BY: * CHOOSE FROM THE LIST BELOW FOR COMPLETING THE FIELDS IN THE INSPECTIONS & MAINTENANCE FRENQUENCY COLUMNS: NAME - _ 2Y'hViit1IJIJ4i4 .SAN DIEGO. CA 92131 ANNUAL SEMI-ANNUALLY QUARTERLY BIMONTHLY MONTHLY AS NEEDED NONE WEEKLY 1 TIME PER YEAR 2 TIMES PER YEAR 3 TIMES PER YEAR 4 TIMES PER YEAR PHONE NO. 858-875-1714 BMP NOTES: THESE BMPS ARE MANDATORY TO BE INSTALLED PER MANUFACTURER'S RECOMMENDA liONS OR THESE PLANS. NO CHANGES TO THE PROPOSED BMPS ON THIS SHEET WITHOUT PRIOR APPROVAL FROM THE CITY ENGINEER. NO SUBS17TU77ONS TO THE MATERIAL OR TYPES OR PLAN17NG TYPES WITHOUT PRIOR APPROVAL FROM THE CITY ENGINEER. NO OCCUPANCY WILL BE GRANTED UN17L THE CITY INSPEC liON STAFF HAS INSPECTED THIS PROJECT FOR APPROPRIATE BMP C0NS7RUC17ON AND INSTALLA liON. REFER TO MAINTENANCE AGREEMENT DOCUMENT SEE PROJECT SWQMP FOR ADOI17ONAL INFORMA liON. SC-A, ONSITE STORM DRAIN INLETS PERMANENT CONTROLS - MARK ALL INLETS WITH THE WORDS "NO DUMPING! FLOWS TO BAY" OR SIMILAR. OPERA 17ONAL BMPS - MAINTAIN AND PERIODICALLY REPAINT OR REPLACE INLET MARKINGS, PRO V'DE STORM WATER POLLU11ON PREVEN17ON INFORMA liON TO NEW SITE OWNERS, LESSEES, OR OPERATORS. SEE APPLICABLE OPERA 71ONAL BMPS IN FACT SHEET SC-44, "DRAINAGE SYSTEM MAINTENANCE," IN THE CASQA STORM WATER QUALITY HANDBOOKS AT WWW CABMPHANDBOOKS. COM. INCLUDE THE FOLLOWING IN LEASE AGREEMENTS: "TENANTS SHALL NOT ALLOW ANYONE TO DISCHARGE ANYTHING TO STORM DRAINS OR TO STORE OR DEPOSIT MA TERIALS SO AS TO CREATE A POTENTiAL DISCHARGE TO STORM DRAINS." SC-D2, LANDSCAPE/OUTDOOR PES77CIDE USE PERMANENT CONTROLS - FINAL LANDSCAPE PLANS WILL ACCOMPLISH ALL OF THE FOLLOWING. PRESERVE EXIS11NG DROUGHT TOLERANT TREES, SHRUBS, AND GROUND COVER TO THE MAXIMUM EXTENT POSSIBLE. DESIGN LANDSCAPING TO MINIMIZE IRRIGA liON AND RUNOFF, TO PROMOTE SURFACE INFIL TRA liON WHERE APPROPRIA 1E AND TO MINIMIZE THE USE OF FER17LIZERS AND PES77CIDES THAT CAN CONTRIBUTE TO STORM WATER POLLU170N. WHERE LANDSCAPED AREAS ARE USED TO RETAIN OR DETAIN STORM WATER, SPECIFY PLANTS THAT ARE TOLERANT OF PERIODIC SA TURA TED SOIL CONDI77ONS. CONSIDER USING PEST-RESISTANT PLANTS, ESPECIALLY ADJACENT TO HARDSCAPE. TO ENSURE SUCCESSFUL ESTABLISHMENT, SELECT PLANTS APPROPRIATE TO SITE SOILS, SLOPES, CLIMATE, SUN, WIND, RAIN, LAND USE, AIR MOVEMENT, ECOLOGICAL CONSISTENCY, AND PLANT INTERAC17ONS. OPERA 170NAL BMPS - MAINTAIN LANDSCAPING USING MINIMUM OR NO PES11CIDES. SEE APPLICABLE OPERA 11ONAL BMPS IN THE FACT SHEET SC-41, "BUILDING AND GROUNDS MAINTENANCE," IN THE CASQA STORMWA TER QUALITY HANDBOOKS AT THE WWW CA BMPHANDBOOKS. COM. PROVIDE IPM INFORMA liON TO NEW OWNERS LESSEES AND OPERATORS. *5C_0. MISCELLANEOUS DRAIN - ROOFING. GUTTERS, AND TRIM PERMANENT CONTROLS - AVOID ROOFING, GUTTERS, AND TRIM MADE OF COPPER OR OTHER !MJPPñTrWr) cZ ThJA T AJAi V I rAlU /MT/) PIIAI( No. 67697 C) olm Li IC) \- Exp:06/30/2021 ©P. SC- PLAZAS. SIDEWALKS. AND PARKING LOTS OPERA 77ONAL BMPS - PLAZAS, SIDEWALKS, AND PARKING LOTS SHALL BE SWEPT REGULARLY TO PREVENT THE ACCUMULA liON OF LITTER AND DEBRIS. DEBRIS FROM PRESSURE WASHING SHALL BE COLLECTED TO PREVENT ENTRY INTO THE STORM DRAIN SYSTEM. WASHWA TER CONTAINING ANY CLEANING AGENT OR DEGREASER SHALL BE COLLECTED AND DISCHARGED TO THE SANITARY SEWER AND NOT DISCHARGED TO A STORM DRAIN. *SOURCE CONTROL NOT LABELED ON EXHIBIT AND WILL BE PRO t4DED BY CONTRACTED CONSULTANT UPON FINAL ENGINEERING NOTE: ADDI17ONAL BMPS: POOLS & INTERIOR PARKING GARAGES WILL BE PROVIDED UPON FINAL ENGINEERING REV. 1/2020 fl "ASBUILT" RCE _______ EXP.__________ DATE REVIEWED BY' INSPECTOR DATE SHEET CITY OF CARLSBAD SHEETS -_I ENGINEERING DEPARTMENT I SINGLE SHEET BMP SITE PLAN BUENA VISTA RESERVOIR SITE (PARK) CR201 9-0040 BMP SITE PLAN APPROVED: JASON S. CELDERT Clii ENGINEER RCE 63912 EXPIRES 9/30/20 DATE DWN DRAWING NO. BY: PROJECT NO. 11 521-1A C~IKD BY: [R(WD BY: ______ CUP2OI 8-0023 I DATE INITIAL REVISION DESCRIPTION DATE INITIAL DATE INITIAL ENGINEER OF WORK OTHER APPROVAL CITY APPROVAL