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Home My WebLink AboutMS 2021-0002; JUNIPER BEACH HOMES; TRASH CAPTURE STORM WATER QUALITY MANAGEMENT PLAN (SWQMP); 2021-10-21 CITY OF CARLSBAD TRASH CAPTURE STORM WATER QUALITY MANAGEMENT PLAN (SWQMP) FOR JUNIPER BEACH HOMES MS/2021-002/CDP 2021-0007/SDP 2021-004 DWG NO.: 533-7A GR. NO.: 2021-0036 ENGINEER OF WORK: Bryan A. Knapp R.C.E NO.: 86542 Expiration date: 03-31-2023 ___________________ PREPARED FOR: RREG Investments Series, LLC Series I039, A Delaware Limited Liability Company 5315 Avenida Encinas, Suite 200 Carlsbad, CA 92008 (949) 637-3254 PREPARED BY: PLSA Engineering 1911 San Diego Avenue, Suite 100 San Diego, CA 92110 (858) 259-8212 DATE: 10/21/2021 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 Trash Capture Structural BMPs Attachment 1: Backup for Trash Capture BMPs Attachment 1a: DMA Exhibit Attachment 1b: Tabular Summary of DMAs Attachment 1c: Trash Capture BMP Design Calculations Attachment 2: Trash Capture BMP Maintenance Thresholds and Actions Attachment 3: Single Sheet BMP (SSBMP) Exhibit CERTIFICATION PAGE Juniper Beach Homes MS/2021-002/CDP 2021-0007/SDP 2021-004 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. Bryan A. Knapp, R.C.E. NO. 86542, 3/31/2023 PLSA Engineering Company Date SITE TAMAR A CK AVEJUNIPE R AVE GAR F I E L D S TCOA S T HW Y 1 0 1 VICINITY MAP NOT TO SCALE Description of Existing Site Condition and Drainage Patterns Select applicable Land Use Category: High Density Residential  R-23 (15-23 du/ac)  R-30 (23-30 du/ac) Industrial  PI (Planned Industrial) Commercial  CF (Community Facilities)  GC (General Commercial)  L (Local Shopping Center)  R (Regional Commercial)  V-B (Village-Barrio)  VC (Visitor Commercial)  O (Office)  VC/OS (Visitor Commercial/Open Space) Mixed Urban  PI/O (Planned Industrial/Office)  Public Transportation Stations 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]: The existing site can be categorized into one major drainage basin, with one primary discharge location leaving the property. Drainage basin EX-1 consists of the entirety of the project site and primarily drains from the southeast corner of the property to the northwest, discharging to the Juniper Avenue right-of-way by surface and sheet flow methods. Once in the Juniper Avenue right-of-way, runoff leaving the site travels northwest approximately 45 feet toward an existing storm drain inlet. The storm drain inlet is on the north side of Juniper Avenue, which is a superelevated road sloping to the north. Surface flow enters the storm drain inlet ultimately are conveyed south to outlet in the Agua Hedionda Lagoon prior to entering the Pacific Ocean. After review of the site edge conditions, existing topography, and adjacent developments, it was determined that there is no additional offsite runon entering the site from the neighboring properties. E-36 Page 1 of 3 Revised 09/21 Development Services Land Development Engineering 1635 Faraday Avenue (760) 602-2750 www.carlsbadca.gov STANDARD PROJECT REQUIREMENT CHECKLIST E-36 Project Information Project Name: Project ID: DWG No. or Building Permit No.: Baseline BMPs for Existing and Proposed Site Features Complete the Table 1 - Site Design Requirement to document existing and proposed site features and the BMPs to be implemented for them. All BMPs must be implemented where applicable and feasible. Applicability is generally assumed if a feature exists or is proposed. BMPs must be implemented for site design features where feasible. Leaving the box for a BMP unchecked means it will not be implemented (either partially or fully) either because it is inapplicable or infeasible. Explanations must be provided in the area below. The table provides specific instructions on when explanations are required. Table 1 - Site Design Requirement A. Existing Natural Site Features (see Fact Sheet BL-1) 1. Check the boxes below for each existing feature on the site. 1. Select the BMPs to be implemented for each identified feature. Explain why any BMP not selected is infeasible in the area below. SD-G Conserve natural features SD-H Provide buffers around waterbodies Natural waterbodies Natural storage reservoirs & drainage corridors -- Natural areas, soils, & vegetation (incl. trees) -- B. BMPs for Common Impervious Outdoor Site Features (see Fact Sheet BL-2) 1. Check the boxes below for each proposed feature. 2. Select the BMPs to be implemented for each proposed feature. If neither BMP SD-B nor SD-I is selected for a feature, explain why both BMPs are infeasible in the area below. SD-B Direct runoff to pervious areas SD-I Construct surfaces from permeable materials Minimize size of impervious areas Streets and roads Check this box to confirm that all impervious areas on the site will be minimized where feasible. If this box is not checked, identify the surfaces that cannot be minimized in area below, and explain why it is infeasible to do so. Sidewalks & walkways Parking areas & lots Driveways Patios, decks, & courtyards Hardcourt recreation areas Other: _______________ C. BMPs for Rooftop Areas: Check this box if rooftop areas are proposed and select at least one BMP below. If no BMPs are selected, explain why they are infeasible in the area below. (see Fact Sheet BL-3) SD-B Direct runoff to pervious areas SD-C Install green roofs SD-E Install rain barrels E-36 Page 2 of 3 Revised 09/21 D. BMPs for Landscaped Areas: Check this box if landscaping is proposed and select the BMP below SD-K Sustainable Landscaping If SD-K is not selected, explain why it is infeasible in the area below. (see Fact Sheet BL-4) Provide discussion/justification for site design BMPs that will not be implemented (either partially or fully): Baseline BMPs for Pollutant-generating Sources All development projects must complete Table 2 - Source Control Requirement to identify applicable requirements for documenting pollutant-generating sources/ features and source control BMPs. BMPs must be implemented for source control features where feasible. Leaving the box for a BMP unchecked means it will not be implemented (either partially or fully) either because it is inapplicable or infeasible. Explanations must be provided in the area below. The table provides specific instructions on when explanations are required. Table 2 - Source Control Requirement A. Management of Storm Water Discharges 1. Identify all proposed outdoor work areas below Check here if none are proposed 2. Which BMPs will be used to prevent materials from contacting rainfall or runoff? (See Fact Sheet BL-5) Select all feasible BMPs for each work area 3. Where will runoff from the work area be routed? (See Fact Sheet BL-6) Select one or more option for each work area SC-A Overhead covering SC-B Separation flows from adjacent areas SC-C Wind protection SC-D Sanitary sewer SC-E Containment system Other Trash & Refuse Storage Materials & Equipment Storage Loading & Unloading Fueling Maintenance & Repair Vehicle & Equipment Cleaning Other: _________________ B. Management of Storm Water Discharges (see Fact Sheet BL-7) Select one option for each feature below: • Storm drain inlets and catch basins … are not proposed will be labeled with stenciling or signage to discourage dumping (SC-F) • Interior work surfaces, floor drains & sumps … are not proposed will not discharge directly or indirectly to the MS4 or receiving waters • Drain lines (e.g. air conditioning, boiler, etc.) … are not proposed will not discharge directly or indirectly to the MS4 or receiving waters • Fire sprinkler test water … are not proposed will not discharge directly or indirectly to the MS4 or receiving waters Provide discussion/justification for source control BMPs that will not be implemented (either partially or fully):