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Home My WebLink AboutPD2024-0021; ELKHORN SERVICES TRASH CAPTURE; TRASH CAPTURE STORM WATER QUALITY MANAGEMENT PLAN; 2025-01-13E-35A REV 12/2024 Development Services Land Development Engineering 1635 Faraday Avenue 442-339-2750 www.carlsbadca.gov TRASH CAPTURE STORM WATER QUALITY MANAGEMENT PLAN (SWQMP) E-35B CITY OF CARLSBAD TRASH CAPTURE STORM WATER QUALITY MANAGEMENT PLAN (SWQMP) FOR ELKHORN SERVICES TRASH CAPTURE PD2024-0021; EAGREE2024-0024 [INSERT DRAWING No. (DWG ___-__)] [INSERT GR No. _________] ENGINEER OF WORK: [INSERT CIVIL ENGINEER'S NAME AND PE NUMBER HERE, PROVIDE WET SIGNATURE AND STAMP ABOVE LINE] PREPARED FOR: ELKHORN SERVICES, LLC2801 CENTERVILLE ROAD, FLOOR 1 WILMINGTON, DELAWARE 19808 302-440-5343 PREPARED BY: JACOBS SOLUTIONS, IN 2001 MARKET ST., STE 900 PHILADELPHIA, PA 19103 (215) 569-2900 DATE: JANUARY 13, 2025 Michael S. McAmis P.E. #C60573 26 . City of Carlsbad 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 Project Name: [Insert] Project ID: [Insert] 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. ________________________________________________________ Engineer of Work's Signature, PE Number & Expiration Date ________________________________________________________ Print Name ________________________________________________________ Company ____________________________ Date ELKHORN SERVICES TRASH CAPTURE PD2024-0021; EAGREE2024-0024 ~l#r~ PROJECT VICINITY MAP PROJECT SITE 2293 COSMOS COURT EL C A M I N O R E A L CAMINO VIDA ROBLE CORTE DE LA PINA PROJECT VICINITY MAPCARLSBAD, CA N Page 1 of 4 REV 12/2024 E-34 To address post-development pollutants that may be generated from development projects, the city requires that new development and significant redevelopment priority projects incorporate Permanent Storm Water Best Management Practices (BMPs) into the project design per Carlsbad BMP Design Manual (BMP Manual). To view the BMP Manual, refer to the Engineering Standards (Volume 5). This questionnaire must be completed by the applicant in advance of submitting for a development application (subdivision, discretionary permits and/or construction permits). The results of the questionnaire determine the level of storm water standards that must be applied to a proposed development or redevelopment project. Depending on the outcome, your project will either be subject to ‘STANDARD PROJECT’ requirements, “PRIORITY DEVELOPMENT PROJECT (PDP) requirements or not considered a development project. This questionnaire will also determine if the project is subject to TRASH CAPTURE REQUIREMENTS. Your responses to the questionnaire represent an initial assessment of the proposed project conditions and impacts. City staff has responsibility for making the final assessment after submission of the development application. If staff determines that the questionnaire was incorrectly filled out and is subject to more stringent storm water standards than initially assessed by you, this will result in the return of the development application as incomplete. In this case, please make the changes to the questionnaire and resubmit to the city. If you are unsure about the meaning of a question or need help in determining how to respond to one or more of the questions, please seek assistance from Land Development Engineering staff. A completed and signed questionnaire must be submitted with each development project application. Only one completed and signed questionnaire is required when multiple development applications for the same project are submitted concurrently. PROJECT INFORMATION PROJECT NAME: APN: ADDRESS: The project is (check one): New Development Redevelopment The total proposed disturbed area is: ft2 ( ) acres The total proposed newly created and/or replaced impervious area is: ft2 ( ) acres If your project is covered by an approved SWQMP as part of a larger development project, provide the project ID and the SWQMP # of the larger development project: Project ID SWQMP #: Then, go to Step 1 and follow the instructions. When completed, sign the form at the end and submit this with your application to the city. This Box for City Use Only City Concurrence: YES NO Date: Project ID: By: Development Services Land Development Engineering 1635 Faraday Avenue 442-339-2750www.carlsbadca.gov STORM WATER STANDARDS QUESTIONNAIRE E-34 INSTRUCTIONS: C cityof Carlsbad □ □ □ □ E-34 Page 2 of 4 REV 12/2024 STEP 1 TO BE COMPLETED FOR ALL PROJECTS To determine if your project is a “development project”, please answer the following question: YES NO Is your project LIMITED TO routine maintenance activity and/or repair/improvements to an existing building or structure that do not alter the size (See Section 1.3 of the BMP Design Manual for guidance)? If you answered “yes” to the above question, provide justification below then go to Step 6, mark the box stating “my project is not a ‘development project’ and not subject to the requirements of the BMP manual” and complete applicant information. Justification/discussion: (e.g. the project includes only interior remodels within an existing building): If you answered “no” to the above question, the project is a ‘development project’, go to Step 2. STEP 2 TO BE COMPLETED FOR ALL DEVELOPMENT PROJECTS To determine if your project is exempt from PDP requirements pursuant to MS4 Permit Provision E.3.b.(3), please answer the following questions: Is your project LIMITED to one or more of the following: YES NO 1.Constructing new or retrofitting paved sidewalks, bicycle lanes or trails that meet the following criteria:a)Designed and constructed to direct storm water runoff to adjacent vegetated areas, or other non- erodible permeable areas; ORb)Designed and constructed to be hydraulically disconnected from paved streets or roads; OR c)Designed and constructed with permeable pavements or surfaces in accordance with USEPAGreen Streets guidance? 2. Retrofitting or redeveloping existing paved alleys, streets, or roads that are designed and constructed inaccordance with the USEPA Green Streets guidance? 3.Ground Mounted Solar Array that meets the criteria provided in section 1.4.2 of the BMP manual? If you answered “yes” to one or more of the above questions, provide discussion/justification below, then go to Step 6, mark the second box stating “my project is EXEMPT from PDP …” and complete applicant information. Discussion to justify exemption (e.g. the project redeveloping existing road designed and constructed in accordance with the USEPA Green Street guidance): If you answered “no” to the above questions, your project is not exempt from PDP, go to Step 3. Interior Tenant Improvements and associated site work. Site work includes utility pads for generators and mechanical equipment, trenching for utilities, and a new guard kiosk and mechanized gate. □ □ □ □ □ □ □ □ E-34 Page 3 of 4 REV 12/2024 * Environmentally Sensitive Areas include but are not limited to all Clean Water Act Section 303(d) impaired water bodies; areas designated as Areas of SpecialBiological Significance by the State Water Resources Control Board (Water Quality Control Plan for the San Diego Basin (1994) and amendments); water bodiesdesignated with the RARE beneficial use by the State Water Resources Control Board (Water Quality Control Plan for the San Diego Basin (1994) and amendments); areas designated as preserves or their equivalent under the Multi Species Conservation Program within the Cities and County of San Diego; Habitat ManagementPlan; and any other equivalent environmentally sensitive areas which have been identified by the City. STEP 3 TO BE COMPLETED FOR ALL NEW OR REDEVELOPMENT PROJECTS To determine if your project is a PDP, please answer the following questions (MS4 Permit Provision E.3.b.(1)): YES NO 1.Is your project a new or redevelopment project that creates 10,000 square feet or more of impervioussurfaces collectively over the entire project site? This includes commercial, industrial, residential, mixeduse, and public development projects on public or private land. 2. Is your project a redevelopment project creating and/or replacing 5,000 square feet or more of impervious surface collectively over the entire project site on an existing site of 10,000 square feet or more ofimpervious surface? This includes commercial, industrial, residential, mixed-use, and public development projects on public or private land. 3. Is your project a new or redevelopment project that creates and/or replaces 5,000 square feet or more ofimpervious surface collectively over the entire project site and supports a restaurant? A restaurant is a facility that sells prepared foods and drinks for consumption, including stationary lunch counters and refreshment stands selling prepared foods and drinks for immediate consumption (Standard Industrial Classification (SIC) code 5812). 4. Is your project a new or redevelopment project that creates 5,000 square feet or more of impervious surface collectively over the entire project site and supports a hillside development project? A hillsidedevelopment project includes development on any natural slope that is twenty-five percent or greater. 5. Is your project a new or redevelopment project that creates and/or replaces 5,000 square feet or more ofimpervious surface collectively over the entire project site and supports a parking lot? A parking lot is a land area or facility for the temporary parking or storage of motor vehicles used personally for business or for commerce. 6. Is your project a new or redevelopment project that creates and/or replaces 5,000 square feet or moreof impervious street, road, highway, freeway or driveway surface collectively over the entire projectsite? A street, road, highway, freeway or driveway is any paved impervious surface used for the transportation of automobiles, trucks, motorcycles, and other vehicles. 7. Is your project a new or redevelopment project that creates and/or replaces 2,500 square feet or more ofimpervious surface collectively over the entire site, and discharges directly to an EnvironmentallySensitive Area (ESA)? “Discharging Directly to” includes flow that is conveyed overland a distance of 200 feet or less from the project to the ESA, or conveyed in a pipe or open channel any distance as an isolated flow from the project to the ESA (i.e. not commingled with flows from adjacent lands).* 8.Is your project a new development or redevelopment project that creates and/or replaces 5,000 squarefeet or more of impervious surface that supports an automotive repair shop? An automotive repair shop is a facility that is categorized in any one of the following Standard Industrial Classification (SIC)codes: 5013, 5014, 5541, 7532-7534, or 7536-7539. 9. Is your project a new development or redevelopment project that creates and/or replaces 5,000 squarefeet or more of impervious area that supports a retail gasoline outlet (RGO)? This category includesRGO’s that meet the following criteria: (a) 5,000 square feet or more or (b) a project Average Daily Traffic (ADT) of 100 or more vehicles per day. 10. Is your project a new or redevelopment project that results in the disturbance of one or more acres of landand are expected to generate pollutants post construction? 11. Is your project located within 200 feet of the Pacific Ocean and (1) creates 2,500 square feet or more of impervious surface or (2) increases impervious surface on the property by more than 10%? (CMC21.203.040) If you answered “yes” to one or more of the above questions, your project is a PDP. If your project is a redevelopment project, go to step 4. If your project is a new project, go to step 5, complete the trash capture question. If you answered “no” to all of the above questions, your project is a ‘STANDARD PROJECT’. Go to step 5, complete the trash capture question. □ □ □ □ □ □ □ □ □ □ □ □ □ □ □ □ □ □ □ □ □ □ E-34 Page 4 of 4 REV 12/2024 STEP 4 TO BE COMPLETED FOR REDEVELOPMENT PROJECTS THAT ARE PRIORITY DEVELOPMENT PROJECTS (PDP) ONLY Complete 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) = sq. ft. Total proposed newly created or replaced impervious area (B) = sq. ft. Percent impervious area created or replaced (B/A)*100 = % If you answered “yes”, the structural BMPs required for PDP apply only to the creation or replacement of impervious surface and not the entire development. Go to step 5, complete the trash capture question. If you answered “no,” the structural BMP’s required for PDP apply to the entire development. Go to step 5, complete the trash capture question. STEP 5 TO BE COMPLETED FOR ALL DEVELOPMENT PROJECTS Complete the question below regarding your Project (SDRWQCB Order No. 2017-0077): YES NO Is the Project within any of the following Priority Land Use (PLU) categories? R-23 (15-23 du/ac), R-30 (23-30 du/ac), PI (Planned Industrial), CF (Community Facilities), GC (General Commercial), L (Local Shopping Center), R (Regional Commercial), V-B (Village-Barrio), VC (VisitorCommercial), O (Office), VC/OS (Visitor Commercial/Open Space), PI/O (Planned Industrial/Office), or Public Transportation Station If you answered “yes”, the ‘PROJECT’ is subject to TRASH CAPTURE REQUIREMENTS. Go to step 6, check the first box stating, “My project is subject to TRASH CAPTURE REQUIREMENTS …” and the second or third box as determined in step 3. If you answered “no”, Go to step 6, check the second or third box as determined in step 3. STEP 6 CHECK THE APPROPRIATE BOX(ES) AND COMPLETE APPLICANT INFORMATION My project is subject to TRASH CAPTURE REQUIREMENTS and must comply with TRASH CAPTURE REQUIREMENTS of the BMP Manual. I understand I must prepare a Storm Water Quality Management Plan (SWQMP). 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. If my project is subject to TRASH CAPTURE REQUIREMENTS, I will submit a TRASH CAPTURE Storm Water Quality Management Plan (TCSWQMP) per E-35A. 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) per E-35 template for submittal at time of application. Note: For projects that are close to meeting the PDP threshold, staff may require detailed impervious area calculations and exhibits to verify if ‘STANDARD PROJECT’ stormwater requirements apply. 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: Applicant Title: Applicant Signature: Date: □ □ □ □ □ □ □ □ ~J.cp!i~ SITE INFORMATION CHECKLIST Project Summary Information Project Name Project ID Project Address Assessor's Parcel Number(s) (APN(s)) Project Watershed (Hydrologic Unit) Carlsbad 904 Parcel Area ________ Acres (____________ Square Feet) 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]: Description of Proposed Site Development and Drainage Patterns Project Description / Proposed Land Use and/or Activities: Does the project include grading and changes to site topography? Yes No Description / Additional Information: Does the project include changes to site drainage (e.g., installation of new storm water conveyance systems)? Yes No Description / Additional Information: 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. E-36 Page 1 of 4 Revised 04/23 Development Services Land Development Engineering 1635 Faraday Avenue 442-339-2750 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 Sidewalks & walkways Parking areas & lots Driveways Patios, decks, & courtyards Hardcourt recreation areas □ □ □ □ □ □ □ □ □ C cityof Carlsbad □ □ □ □ □ □ □ □ □ □ □ □ □ □ □ □ □ E-36 Page 2 of 4 Revised 04/23 Other: _______________ infeasible to do so. 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 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 □ □ □ D □ □ □ D D □ □ □ □ □ □ □ □ □ □ □ □ □ □ □ E-36 Page 3 of 4 Revised 04/23 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): □ □ □ □ □ □ □ □ □ □ □ □ □ □ □ □ □ □ □ □ □ □ □ □ □ □ □ □ □ □ □ □ □ □ □ □ □ □ □ □ □ □ □ E-36 Page 4 of 4 Revised 04/23 Form Certification This E-36 Form is intended to comply with applicable requirements of the city’s BMP Design Manual. I certify that it has been completed to the best of my ability and accurately reflects the project being proposed and the applicable BMPs proposed to minimize the potentially negative impacts of this project's land development activities on water quality. I understand and acknowledge that the review of this form by City staff is confined to a review and does not relieve me as the person in charge of overseeing the selection and design of storm water BMPs for this project, of my responsibilities for project design. Preparer Signature: Date: Print preparer name: '111ldwJJ.'f/1~ I SUMMARY OF TRASH CAPTURE BMPS Trash Capture BMPs All projects subject to trash capture requirements must implement trash capture BMPs (see Chapter 4 of the BMP Design Manual). Selection of trash capture BMPs must be based on the selection process described in Chapter 4. Trash capture 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 trash capture BMPs (see Section 1.12 of the BMP Design Manual). Trash capture 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 trash capture BMP implementation at the project site in the box below. Then complete the trash capture BMP summary information sheet for each trash capture BMP within the project (copy the BMP summary information page as many times as needed to provide summary information for each trash capture BMP). Describe the general strategy for trash capture BMP implementation at the site. This information must describe how the steps for selecting and designing trash capture BMPs presented in Section 4.4 of the BMP Design Manual were followed, and the results (type of BMPs selected). [Continue on next page as necessary.] [Continued from previous page – This page is reserved for continuation of description of general strategy for trash capture BMP implementation at the site.] Trash Capture BMP Summary Information BMP ID No. Type of Trash Capture BMP Permit No. Drawing No. ATTACHMENT 1 BACKUP FOR TRASH CAPTURE BMPS This is the cover sheet for Attachment 1. Check which Items are Included behind this cover sheet: Attachment Sequence Contents Checklist Attachment 1a DMA Exhibit (Required) See DMA Exhibit Checklist on the back of this Attachment cover sheet. (24”x36” Exhibit typically required) Included Attachment 1b Tabular Summary of DMAs Showing DMA ID matching DMA Exhibit, DMA Area, and DMA Type (Required)* *Provide table in this Attachment OR on DMA Exhibit in Attachment 1a Included on DMA Exhibit in Attachment 1a Included as Attachment 1b, separate from DMA Exhibit Attachment 1c Trash Capture BMP Design Worksheets / Calculations (Required) Refer to Appendices J of the BMP Design Manual for trash capture BMP design guidelines Included Use this checklist to ensure the required information has been included on the DMA Exhibit: The DMA Exhibit must identify: Site topography and impervious areas Site drainage network and connections to drainage offsite Proposed grading (if applicable) Drainage management area (DMA) boundaries, DMA ID numbers, and DMA areas (square footage or acreage) Trash Capture BMPs (identify location and type of BMP) ~ w ...J u:: o._ ::a ~ w ::a ;:: 0 7.29 ) / 254.Q4 I I • ~ 'tA \ DMAID# 1 2 LEGEND: OMA DESCRIPTION DRAINS TO BMP-1,4,5,6 DRAINS TO BMP-2,3 BMP ID# NOTES - -250 - -EXISTING MAJOR CONTOUR -251 EXISTING MINOR CONTOUR -250 -PROPOSED MAJOR CONTOUR -251 -PROPOSED MINOR CONTOUR -- -PROPERTYLINE +--FLOW DIRECTION 1111111111111111111111 CONCRETE CHANNEL IMPERVIOUS TRIBUTARY AREA PERVIOUS TRIBUTARY AREA ··-·-•-1. ·-■-■-■I DMA-1 BOUNDARY 1•-·-•-1. ·-■-■-■I DMA-2 BOUNDARY PROJECT AREA CONSISTS OF NRCS SOIL TYPE B SOIL SAMPLES PRESENTED IN GEOTECHNICAL REPORT SHOW NO PRESENCE OF GROUNDWATER WITHIN 20 fl BGS TRASH CAPTURE BMP TABLE BMPTYPE SYMBOL CASQA NO. QUANTITY DRAWING NO. SHEET NO.(S) INSPECTION * FREQUENCY TRASH CAPTURE BMPs INLET Ill QUARTERLY (i)-0 TC-50 4EA. (MONTHLY DURING FILTER WET SEASON) CURB INLET II QUARTERLY ® TC-50 1 EA. (MONTHLY DURING FILTER WET SEASON) TRENCH DRAIN QUARTERLY ® IIIIIIIIIIHIIII TC-50 1 EA. (MONTHLY DURING INLET FILTER WET SEASON) SOURCE CONTROL (]) PERMEABLE ~ TC-10 3,760SF SEMI-ANNUALLY PAVEMENT OMA SUMMARY* MAINTENANCE * FREQUENCY QUARTERLY QUARTERLY QUARTERLY ANNUAL AREA PROVIDED (SF) BMPTYPE OMA AREA (SF) OMA AREA (AC) IMPERVIOUS AREA (SF) PERVIOUS AREA (SF) WEIGHTED C VALUE AREA (SF) REQUIRED FOR DISPERSION FORWQ {PERMEABLE PAYERS) TRASH CAPTURE I 54,910 1.26 54,910 480 0.90 31,330 3,760 SOURCE CONTROL BMP TRASH CAPTURE 28,330 0.65 28,330 0 0.90 5,610 BMP TOTAL AREA 83,240 1.91 83,240 480 • CALCULATIONS SHOWN FOR REFERENCE ONLY, THIS PROJECT IS A STANDARD PROJECT AND DOES NOT REQUIRE STRUCTURAL BMPS. ~ ot::===================================================================================================~----------------~ Jacobs 777 Main St Fort Worth, TX 76102 P 817.735.6000 F 817.735.6148 www .jacobs.com sea 13280 Evening Creek Drive South I Suite 125 San Diego, CA92128 858.793.4777 I sca-sd.com A RCHITECT UR E 0 10 N COSMOS OMA EXHIBIT 20 --~ 2293 COSMOS COURT Discipline: CARLSBAD, CA 92011 CIVIL Project Number: K4018372 Scale: 1" = 20' J.2 Trash Capture Design Requirements J.2.1 Design Flow Rate Date 1/8/2025 C = 0.9 I = 0.471 in/hr A (DMA 1) = 54910 sf 1.26 ac A (DMA 2) = 28330 sf 0.65 ac Q (DMA 1) = 0.53 cfs Q (DMA 2) = 0.28 cfs Q=CXiXA here: Q = Design flow rate in cubic feet per second = Run ff fact r area-weighted e timate using Table B.1-1. i = Rainfall intensity in inches per hour. (typical i= .471 in/hr) = Tributary area (acres) which includes the total area draining to the trash capture Bi\1P, including any ff ite r n ite area that c mingle with pr ject run ff and drain t the tra h capture BMP. '\ hen calculatin fi r de ign fl , race, u e the 1ati nal ceanic and cm spheric dmini tration ational O ) 'i; eather ervice's Precipitation Frequency Data erver for rainfall intensity value . Project can u e the rainfall inten ity of 0.4 1 in/hr for one-year, one-hour storm event which is ba ed on the precipitation frequency data station at Oceanside Pumping Plant (Latirudc:33.2103°, Longitude: -117 .3536°). If the engineer chooses to utilize a rainfall intensity within closer proximity to the project location, include the latitude and longirude and/or address in the Trash Capture 'i; QMP so staff reviewer can verify the rainfall intensity alue. Table B.1-1: Runoff factors for surfaces draining to BMPs-Pollutant Control BMPs Impervious 0.90 urfaccs mposed bles, rushed urfaccs IC, ompactcd soil (unpaved 0.30 D-D, Engineered 0.10 Pcrvious urfaccs l..1ndscapcd/ tllulchcd oils 0.10 1 arural Pervious 0.14 Surfaces 0.23 0.30 Dispersion Area Areas routed to or sen·in,, as a dispersion cc Dispersion area per D-8 rea ATTACHMENT 2 Trash Capture 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 2 must identify: Typical maintenance indicators and actions for proposed trash capture BMP(s) based on Section 7.7 of the BMP Design Manual Final Design level submittal: Attachment 2 must identify: Specific maintenance indicators and actions for proposed trash capture BMP(s). This shall be based on Section 7.7 of the BMP Design Manual and enhanced to reflect actual proposed components of the trash capture BMP(s) How to access the trash capture BMP(s) to inspect and perform maintenance Features that are provided to facilitate inspection (e.g., observation ports, cleanouts, silt posts, or other features that allow the inspector to view necessary components of the trash capture BMP and compare to maintenance thresholds) Manufacturer and part number for proprietary parts of trash capture BMP(s) when applicable Maintenance thresholds for BMPs subject to siltation or heavy trash (e.g., silt level posts or other markings shall be included in all BMP components that will trap and store sediment, trash, and/or debris, so that the inspector may determine how full the BMP is, and the maintenance personnel may determine where the bottom of the BMP is . If required, posts or other markings shall be indicated and described on structural BMP plans.) Recommended equipment to perform maintenance When applicable, necessary special training or certification requirements for inspection and maintenance personnel such as confined space entry or hazardous waste management Attachment 2: BMP Maintenance Information 1 The following maintenance information is applicable for FloGard by Oldcastle Infrastructure (www.oldcastleinfrastructure.com) and permeable pavement. Maintenance of these BMPs will include the following key components: 1. Regular Sweeping and Removal of Debris The site and parking lot will be swept by a driver operated, hybrid, sweeping vehicle on a regular basis. Sediment and debris (litter, leaves, papers, cans, etc.) within the area, especially around the drainage inlet, will be collected and removed. The frequency of the sweeping will be done on a weekly basis. 2. Regular Inspections The Oldcastle FloGard filters and their components will be inspected on a regular basis. The frequency of the inspections will be based on pollutant loading, amount of debris, leaves, etc., and amount of runoff. Inspections during the wet season should be performed on a monthly basis. At a minimum, there will be four (4) inspections per year. 3. Conduct of the Visual Inspection FloGard Filter a. Inspect after every storm event. b. Broom sweep around the drain inlet and remove the grate. c. Check the condition of the Liner, Fossil Rock pouches inside the Liner, and the GeoGrid Support Basket & Cable. d. Replace components if they show signs of serviceability following maintenance procedure below. e. After inspection, replace any removed components and replace the grate to the inlet. Permeable Pavement f. Remove accumulation of sediment, litter, debris, or weeds from pavement surface. g. Inspect the pavement to determine if runoff is infiltrating properly or if there is any standing water; inspect monthly. h. Inspect the surface of pavement to identify any damaged areas that may need replacement. i. At least twice per year during storm events. Additional inspections after periods of heavy runoff are desirable. Attachment 2: BMP Maintenance Information 2 4. Cleaning & Maintenance The FloGard and permeable pavement must be cleaned out on a recurring basis. FloGard Filter a. Broom sweep around the drain inlet and remove the grate. b. Unclip and remove the Fossil Rock pouches from the inside Liner. c. Lift the FloGard from the catch basin. d. Using a slotted screw driver, carefully pry open the metal tabs holding the GeoGrid and Cable in place. Separate the GeoGrid and Liner from the FloGard frame. e. Unclip the Liner from the inside of the GeoGrid. If you are reusing the Liner, rinse thoroughly with water and inspect for tears. (If torn, mend with stainless steel wire or replace the Liner). f. Rinse and inspect the GeoGrid Basket and the reinforcing cable. (If torn, mend with stainless steel wire or replace the GeoGrid). g. Rinse and inspect the Stainless Steel FloGard frame. h. To reassemble FloGard after performing maintenance: i. Fully expand the GeoGrid Basket and orient to the FloGard frame. Hook cable and GeoGrid to the FloGard frame metal tabs and close the tabs using slotted screwdriver. Move around the FloGard until all tabs are closed and GeoGrid is secured to the Frame. ii. Expand and orient the Liner, locating the clips at each corner and side. Push the Liner through the center of the FloGard frame and secure the clips to the GeoGrid Basket close to the top support cable. Push the Liner to expand inside of the basket. iii. Clip new Fossil Rock Rubberizer pouches to the inside of the liner iv. Lower FloGard back into the inlet, replace grate. i. Replace filter components every 6 months to 1 year, per manufacturer’s recommendations. Permeable Pavement a. Preventive vacuum and sweeping should be performed at least twice per year. Pavement should be swept with a vacuum power or regenerative air street sweeper to maintain infiltration through paving surface. b. Cleanings include removal of accumulated sediments and debris. If sediment build up occurs, inspect surrounding area for any exposed soil or other sources of sediment that may require source control. c. If standing water occurs after sweeping and vacuuming the surface, BMP may require retrofit to restore infiltration. Attachment 2: BMP Maintenance Information 3 5. Stencilling Legibility of stencils and/or signs at all storm drain inlets and catch basins within the project area must be maintained at all times. 6. Maintenance Log Keep a log of all inspection and maintenance performed on the Oldcastle Infrastructure FloGard and permeable pavement. Keep this log on-site. Attachment 2: BMP Maintenance Information 4 Table 7-3 and Table 7-6 provide the maintenance indicators and actions from the BMP Design Manual Section 7.7 TABLE 7-3. Maintenance Indicators and Actions for Non-Vegetated Infiltration BMPs Accumulation of sediment, litter, or debris in infiltration basin, pre- treatment device, or on permeable pavement surface Standing water in infiltration basin without subsurface infiltration gallery for longer than 96 hours following a storm event Standing water in subsurface infiltration gallery for longer than 96 hours following a storm event Maintenance :Actions Remove and properly dispose accumulated materials. Remove and replace clogged surface soils. This condition requires investigation of why infiltration is not occurring. lf feasible, corrective action shaJJ be taken to restore infiltration (e.g. flush fine sediment or remove and replace clogged soils). BMP may require retrofit if infiltration cannot be restored. If retrofit is necessary, the City Engineer shaU be contacted prior to any repairs or reconstruction. Standing water in permeable paving Flush fine sediment from paving and subsurface gravel. Provide area routine vacuuming of permeable paving areas to prevent clogging. Damage to permeable paving surface Repair or replace damaged surface as appropriate. Note: When inspection or maintenance indicates sediment is accumulating in an infiltration BMP, the D:MA draining to the infiltration BMP should be examined to determine the source of the sediment, and corrnctive measures should be made as applicable to minimize the sediment supply. TABLE 7-6. Maintenance Indicators and Actions for Trash Captures BMPs -II ----I . ,. -·-.... ~ ,., lnL~ -.! l•l'III■~ Accumulation of sediment, litter, or Remove and properly dispose accumulated materials. debris Obstructed inlet or outlet structure Clear obstructions. Clogged filter media Remove and properly dispose filter media, and replace with fresh media. Damage to components of the filtration Repair or replace as applicable. system Note: For trash capture BMPs, refer to the manufacturer's maintenance guide. ATTACHMENT 3 City standard Trash Capture BMP Exhibit [Use the City’s standard Trash Capture BMP Plan.] Feet 4020010 --...___ 1 7.29 EXISTING INLET --so J_ I __ _,.. I I o I 0 0 0 OURT --- EXISTING STORM STRUCTURE SCALE: 1" = 20' ,- 1 I I I I I I DATE PARTY RESPONSIBLE FOR MAINTENANCE: BMP CONSTRUCTION AND INSPECTION NOTES: NAME ELKHORN SERVICES, LLC ADDRESS 2801 CENTERVILLE RD. CONTACT MATT DOUGHTY 1ST FLOOR, PMB 811 WILMINGTON, DE 19808 EMAIL : elkhomservices-ops@seafaninfra.com THE EOW WILL VERIFY THAT PERMANENT BMPS ARE CONSTRUCTED AND OPERATING IN COMPLIANCE WITH THE APPLICABLE REQUIREMENTS. PRIOR TO OCCUPANCY THE EOW MUST PROVIDE: PHONE NO. (302) 440-5343 PLAN PREPARED BY: NAME MICHAELS. McAMIS, PE QSD COMPANY~JA~C~O=B~S ____ _ SIGNATURE ADDRESS 2600 MICHELSON DR. STE. 500 IRVINE, CA 92612-6506 US PHONE NO. +1 9411-224-7946 BMPNOTES: CERTIFICATION C60573 I 23876 1. THESE BMPS ARE MANDATORY TO BE INSTALLED PER MANUFACTURER'S RECOMMENDATIONS AND/OR THESE PLANS. 2. NO CHANGES TO THE PROPOSED BMPS ON THIS SHEET WITHOUT PRIOR APPROVAL FROM THE CITY ENGINEER. 3. NO SUBSTITUTIONS TO THE MATERIAL OR TYPES OR PLANTING TYPES WITHOUT PRIOR APPROVAL FROM THE CITY ENGINEER. 4. NO OCCUPANCY WILL BE GRANTED UNTIL THE CITY INSPECTION STAFF HAS INSPECTED THIS PROJECT FOR APPROPRIATE BMP CONSTRUCTION AND INSTALLATION. 5. REFER TO MAINTENANCE AGREEMENT DOCUMENT. 6. SEE PROJECT SWQMP FOR ADDITIONAL INFORMATION. 1. PHOTOGRAPHS OF THE INSTALLATION OF PERMANENT BMPS PRIOR TO CONSTRUCTION, DURING CONSTRUCTION, AND AT FINAL INSTALLATION. 2. A WET STAMPED LETTER VERIFYING THAT PERMANENT BMPS ARE CONSTRUCTED AND OPERATING PER THE REQUIREMENTS OF THE APPROVED PLANS. 3. PHOTOGRAPHS TO VERIFY THAT PERMANENT WATER QUALITY TREATMENT SIGNAGE HAS BEEN INSTALLED. PRIOR TO RELEASE OF SECURITIES, THE DEVELOPER IS RESPONSIBLE FOR ENSURING THE PERMANENT BMPS HAVE NOT BEEN REMOVED OR MODIFIED BY THE NEW HOMEOWNER OR HOA WITHOUT THE APPROVAL OF THE CITY ENGINEER. TRASH CAPTURE BMP TABLE •O' ,.,. ,:o ,a-s,;•J BMP ID# BMPTYPE SYMBOL CASQA NO. QUANTITY TRASH CAPTURE BMPs INLET ■ CD-0 TC-50 FILTER CURB INLET ■ ® TC-50 FILTER TRENCH DRAIN ® 1111111111111111 I IIII I TC-50 INLET FILTER SOURCE CONTROL (j) PERMEABLE PAVEMENT ~ TC-10 _, --"""" / orm "" FL-rn ELEMENT \'I TH GE·~TD TILc SL~EVE 4EA. 1 EA. 1 EA. 3,760 SF FILTE'i ELE\E'V NITH •!EOTD<T L~ SLECVE DRAWING NO. SHEET NO.(S) INSPECTION * MAINTENANCE * FREQUENCY FREQUENCY c\.TLET __L " ~ B"PASS r•,c TEE. --' ' ' ', I ' " ./ DETAIL B SECTION VIEW 1,1_m,•,,.,E >DAPTER ~O>FlCU""HC.S FF-12D FF-IOcl 11--1"~· FF-IB:l6SD rr-24Y-O FF-24'600•~ QUARTERLY (MONTHLY DURING QUARTERLY WET SEASON) QUARTERLY (MONTHLY DURING QUARTERLY WET SEASON) QUARTERLY (MONTHLY DURING QUARTERLY WET SEASON) SEMI-ANNUALLY ANNUAL SPECIFIER CHART li'X12" IC"X IS' GRI\TED INLE, IC"Xla" IH"SIO GHAl~UINL~ IC'X1B" 2'l''X2C-' GRATED INIF, IS"XC'o" 1e··s-"J '3HAl~UINL~ 1wx1~· 18"X'•l COM~lrJATION INIFT 24" x24· '6" X2"" GRATED INLE •4· x:,5· 24" X40" GRATED INLE 14" X2<" 18" X2S' COMEINATION lf•ILET 24· x:w 24"X4(•" COMElr-11\TIQN ltllET Ff-JiD (2 r lECE;, \f,"XJfi" JG' X4C' GRATED INLET FS-J:.1or, :2 PIECE', ;o"X4&" 40"XW GR.~TED INLE [)' rn:AL -[)COIL SJCK A~~Jci~N~c,j'.t~~\-~ i s~~1n ~~s STCCL 01LT~R mAM~ __J . __ V.'11~ RUBBER ,:"(:KU. I PCHF~OPYLE~E SEOTETI.E _,1_ FILTER ELE'.IENT. I --GPA""E (llY ,:) HI.Wi'.• '" :e,:• ,,, SPECIFIER CHART STA1r<.E% STEEL ,·uFPCRl HOOK.-'-. FC-J,S El-Cr, I '-, ' <;;,•:,.; ,.le '·'"'·'"-'' •cc-,u~ 10.0 ,:;o· "CH C.l~ PO c·«• -Cc-'<JO, '"·" ,_•,,·; -o,.,c-:,c, 10.0 ,:,,· .,.,_,, ·~ "" ''"' ·ac.,o·,c, ,-~ :m• ·cr-,u~ ce., ,,,.., '·" 1,:0:~01 ,.-o '-'"'"' "·'"'''"·' •:C, ~•JO/SJ., '""''"'' l. rit,· "'"' ,,..~, '"" t, ,,rnnJM•"-or, ,tolnles, ,,..,, T·;,ei)4 FO,· m,JI-,"", >,II C• ~,,,:: ll,cc< ~ ~,,,11,; ,o~ moJn\Olrioe,noc:oe:ar,c, *"" ""'"~"'"''""'~"'"'"" ,,,,~, "P"'" ,.,,~, scr,, Of ma~mm oc1a, "'"""" l"'·''""'l~•·Jo,l,l e"•J·0''H noGo•O" cuea "'-CT CILTCR /,SSo.<IL, -C,i,R 'l ----, ~ ~ OPC•<IN:; I -,----jc'+---1 ~ \ri ,_J B 12,yo· )' j CSTCH "'"'" 8 F"I.FS '""' ~ , l~•:lel """ FG-lOOF3 PIPE• J.0 FC-TOOF'-rlPE. L.0 SG-TOOS6 PIPF '3.0 FC-TOOF~ FIPE 1.0 FG-TOOFlfi PIP[ 11U FG-TOOFl2 PIPE 12.0 l·Ci-lLXJI lU FleL 1".'J SG-TMF2-: PIPF ~1 0 FG-TDQNJ .~ANCL !.0 FG-ll•J~'L1 e>f,>JFI 1uc, FG-TDQA·2 PA>JEL 12.0 FG-TDOA24 PAN EC 24 0 I ~ .. 5 • rJ. TERN,\TE ~D,.PTERCQ~FIGOJR,'.TIQ~. SEE DET,\L E "Clll'.",Cm' ern 5 rT $E(WE'ff U$ED C·4 S.5 cs '' '' 15 °' U.b NOTES F Lu, scowl l,urnc· shall k crn,Occld ·""' ,1,;, less sn1 r,r, ,cu F "" rneo;o•n ,1,,11 oe FossiCRoci< , ;,,,1"""' "'"' rnintiinc,: ir ax:ordar,cc ,.;111 nmJfc.::':JJrcr spcc;l:,aOons S1m ro .,aeac t; oallecl< 1:% .,f ra9<i-r•rn solffi .,c loct;on ~,;,c l> ;,-,-!p&(' r(I I t•r;n; 0)4a,o < ® ~;~:a~~~nsert Filler Q g~~r~~i~:., ,,., ,, -·. _..;, Curb Jnlef Style ,,';:'°. o~~·-, .n, . a.1 ", ® ::~:a::~~nsert Filler Q,g\g~~!!!~:,-,,,. .... _ - "·'~" Trench Dram Style "" ,,.,1,, ,m;c, "<m • o,, INITIAL * CHOOSE FROM THE LIST BELOW FOR COMPLETING THE FIELDS IN THE INSPECTIONS & MAINTENANCE FREQUENCY COLUMNS: 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 DATE INITIAL DATE INITIAL 11 AS BUILT" RCE EXP, DATE REVIE\vED BY• REV. 512021 INSPECTOR DATE I SHEET I CITY OF CARLSBAD I SHEETS I ENGINEERING DEPARTMENT SINGLE SHEET TRASH CAPTURE BMP SITE PLAN TITLE SHEET APPROVED: JASON S. GELDERT ENGINEERING MANAGER RCE 63912 EXPIRES 9/30/26 DATE OWN BY: PROJECT NO. CHKD BY: ENGINEER OF WORK REVISION DESCRIPTION OTHER APPROVAL CITY APPROVAL RVWD BY: I II DRAWING NO.I