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SDP 2023-0014; CARLSBAD VILLAGE MIXED-USE - SB 330; SWQMP STUDY - NOVEMBER 1, 2023; 2023-11-01
E-35 REV 04/23 Development Services Land Development Engineering 1635 Faraday Avenue 442-339-2750 www.carlsbadca.gov STORM WATER QUALITY MANAGEMENT PLAN (SWQMP) TEMPLATE E-35 (FOR PDP PROJECTS ONLY) CITY OF CARLSBAD PRIORITY DEVELOPMENT PROJECT (PDP) STORM WATER QUALITY MANAGEMENT PLAN (SWQMP) FOR [INSERT PROJECT NAME] [INSERT PROJECT ID (CT/MS/SDP/CDP/PD)] [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: [INSERT APPLICANT NAME] [INSERT ADDRESS] [INSERT CITY, STATE ZIP CODE] [INSERT TELEPHONE NUMBER] PREPARED BY: [INSERT COMPANY NAME] [INSERT ADDRESS] [INSERT CITY, STATE ZIP CODE] [INSERT TELEPHONE NUMBER] DATE: [INSERT MONTH, DAY, YEAR] _________________________________________________________ Provide Wet Signature and Stamp Above Line Chelisa Pack, PE, RCE 71026 November 1st, 2023 Carlsbad Village Mixed Use GRT Carlsbad Village, LLC 2001 Wilshire Blvd, Suite 420 Santa Monica, CA 90403 818-731-3646 JN:4488.00 PRELIMINARY SDP 2023-0014 SDP 2023-0014 TABLE OF CONTENTS Certification Page Project Vicinity Map FORM E-34 Storm Water Standard Questionnaire Site Information FORM E-36 Standard Project Requirement Checklist Summary of PDP Structural BMPs Attachment 1: Backup for PDP Pollutant Control BMPs Attachment 1a: DMA Exhibit Attachment 1b: Tabular Summary of DMAs and Design Capture Volume Calculations Attachment 1c: Harvest and Use Feasibility Screening (when applicable) Attachment 1d: Infiltration Feasibility Analysis (when applicable) Attachment 1e: Pollutant Control BMP Design Worksheets / Calculations Attachment 1f: Trash Capture BMP Requirements 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 P:\4488\Engr\Reports\SWQMP-Prelim\ 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 Carlsbad Village Mixed Use 71026, 6-30-25 SDP 2023-0014 PROJECT VICINITY MAP Page 1 of 4 REV 04/23 E-34 To address post-development pollutants that may be generated from development projects, the city requires that new development and significant redevelopment priority projects incorporate Permanent Storm Water Best Management Practices (BMPs) into the project design per Carlsbad BMP Design Manual (BMP Manual). To view the BMP Manual, refer to the Engineering Standards (Volume 5). This questionnaire must be completed by the applicant in advance of submitting for a development application (subdivision, discretionary permits and/or construction permits). The results of the questionnaire determine the level of storm water standards that must be applied to a proposed development or redevelopment project. Depending on the outcome, your project will either be subject to ‘STANDARD PROJECT’ requirements, “PRIORITY DEVELOPMENT PROJECT (PDP) requirements or not considered a development project. This questionnaire will also determine if the project is subject to TRASH CAPTURE REQUIREMENTS. Your responses to the questionnaire represent an initial assessment of the proposed project conditions and impacts. City staff has responsibility for making the final assessment after submission of the development application. If staff determines that the questionnaire was incorrectly filled out and is subject to more stringent storm water standards than initially assessed by you, this will result in the return of the development application as incomplete. In this case, please make the changes to the questionnaire and resubmit to the city. If you are unsure about the meaning of a question or need help in determining how to respond to one or more of the questions, please seek assistance from Land Development Engineering staff. A completed and signed questionnaire must be submitted with each development project application. Only one completed and signed questionnaire is required when multiple development applications for the same project are submitted concurrently. PROJECT INFORMATION PROJECT NAME: APN: ADDRESS: The project is (check one): New Development Redevelopment The total proposed disturbed area is: ft2 ( ) acres The total proposed newly created and/or replaced impervious area is: ft2 ( ) acres If your project is covered by an approved SWQMP as part of a larger development project, provide the project ID and the SWQMP # of the larger development project: Project ID SWQMP #: Then, go to Step 1 and follow the instructions. When completed, sign the form at the end and submit this with your application to the city. This Box for City Use Only City Concurrence: YES NO Date: Project ID: By: Development Services Land Development Engineering 1635 Faraday Avenue 442-339-2750www.carlsbadca.gov STORM WATER STANDARDS QUESTIONNAIRE E-34 INSTRUCTIONS: E-34 Page 2 of 4 REV 04/23 STEP 1 TO BE COMPLETED FOR ALL PROJECTS To determine if your project is a “development project”, please answer the following question: YES NO Is your project LIMITED TO routine maintenance activity and/or repair/improvements to an existing building or structure that do not alter the size (See Section 1.3 of the BMP Design Manual for guidance)? If you answered “yes” to the above question, provide justification below then go to Step 6, mark the box stating “my project is not a ‘development project’ and not subject to the requirements of the BMP manual” and complete applicant information. Justification/discussion: (e.g. the project includes only interior remodels within an existing building): If you answered “no” to the above question, the project is a ‘development project’, go to Step 2. STEP 2 TO BE COMPLETED FOR ALL DEVELOPMENT PROJECTS To determine if your project is exempt from PDP requirements pursuant to MS4 Permit Provision E.3.b.(3), please answer the following questions: Is your project LIMITED to one or more of the following: YES NO 1.Constructing new or retrofitting paved sidewalks, bicycle lanes or trails that meet the following criteria:a)Designed and constructed to direct storm water runoff to adjacent vegetated areas, or other non- erodible permeable areas; ORb)Designed and constructed to be hydraulically disconnected from paved streets or roads; OR c)Designed and constructed with permeable pavements or surfaces in accordance with USEPAGreen Streets guidance? 2. Retrofitting or redeveloping existing paved alleys, streets, or roads that are designed and constructed inaccordance with the USEPA Green Streets guidance? 3.Ground Mounted Solar Array that meets the criteria provided in section 1.4.2 of the BMP manual? If you answered “yes” to one or more of the above questions, provide discussion/justification below, then go to Step 6, mark the second box stating “my project is EXEMPT from PDP …” and complete applicant information. Discussion to justify exemption (e.g. the project redeveloping existing road designed and constructed in accordance with the USEPA Green Street guidance): If you answered “no” to the above questions, your project is not exempt from PDP, go to Step 3. E-34 Page 3 of 4 REV 04/23 * Environmentally Sensitive Areas include but are not limited to all Clean Water Act Section 303(d) impaired water bodies; areas designated as Areas of SpecialBiological Significance by the State Water Resources Control Board (Water Quality Control Plan for the San Diego Basin (1994) and amendments); water bodiesdesignated with the RARE beneficial use by the State Water Resources Control Board (Water Quality Control Plan for the San Diego Basin (1994) and amendments); areas designated as preserves or their equivalent under the Multi Species Conservation Program within the Cities and County of San Diego; Habitat ManagementPlan; and any other equivalent environmentally sensitive areas which have been identified by the City. STEP 3 TO BE COMPLETED FOR ALL NEW OR REDEVELOPMENT PROJECTS To determine if your project is a PDP, please answer the following questions (MS4 Permit Provision E.3.b.(1)): YES NO 1. Is your project a new development that creates 10,000 square feet or more of impervious surfacescollectively over the entire project site? This includes commercial, industrial, residential, mixed-use,and public development projects on public or private land. 2. Is your project a redevelopment project creating and/or replacing 5,000 square feet or more of impervious surface collectively over the entire project site on an existing site of 10,000 square feet or more ofimpervious surface? This includes commercial, industrial, residential, mixed-use, and public development projects on public or private land. 3. Is your project a new or redevelopment project that creates and/or replaces 5,000 square feet or more ofimpervious surface collectively over the entire project site and supports a restaurant? A restaurant is a facility that sells prepared foods and drinks for consumption, including stationary lunch counters and refreshment stands selling prepared foods and drinks for immediate consumption (Standard Industrial Classification (SIC) code 5812). 4. Is your project a new or redevelopment project that creates 5,000 square feet or more of impervious surface collectively over the entire project site and supports a hillside development project? A hillsidedevelopment project includes development on any natural slope that is twenty-five percent or greater. 5. Is your project a new or redevelopment project that creates and/or replaces 5,000 square feet or more ofimpervious surface collectively over the entire project site and supports a parking lot? A parking lot is a land area or facility for the temporary parking or storage of motor vehicles used personally for business or for commerce. 6. Is your project a new or redevelopment project that creates and/or replaces 5,000 square feet or moreof impervious street, road, highway, freeway or driveway surface collectively over the entire projectsite? A street, road, highway, freeway or driveway is any paved impervious surface used for the transportation of automobiles, trucks, motorcycles, and other vehicles. 7. Is your project a new or redevelopment project that creates and/or replaces 2,500 square feet or more ofimpervious surface collectively over the entire site, and discharges directly to an EnvironmentallySensitive Area (ESA)? “Discharging Directly to” includes flow that is conveyed overland a distance of 200 feet or less from the project to the ESA, or conveyed in a pipe or open channel any distance as an isolated flow from the project to the ESA (i.e. not commingled with flows from adjacent lands).* 8.Is your project a new development or redevelopment project that creates and/or replaces 5,000 squarefeet or more of impervious surface that supports an automotive repair shop? An automotive repair shop is a facility that is categorized in any one of the following Standard Industrial Classification (SIC)codes: 5013, 5014, 5541, 7532-7534, or 7536-7539. 9. Is your project a new development or redevelopment project that creates and/or replaces 5,000 squarefeet or more of impervious area that supports a retail gasoline outlet (RGO)? This category includesRGO’s that meet the following criteria: (a) 5,000 square feet or more or (b) a project Average Daily Traffic (ADT) of 100 or more vehicles per day. 10. Is your project a new or redevelopment project that results in the disturbance of one or more acres of landand are expected to generate pollutants post construction? 11. Is your project located within 200 feet of the Pacific Ocean and (1) creates 2,500 square feet or more of impervious surface or (2) increases impervious surface on the property by more than 10%? (CMC21.203.040) If you answered “yes” to one or more of the above questions, your project is a PDP. If your project is a redevelopment project, go to step 4. If your project is a new project, go to step 5, complete the trash capture question. If you answered “no” to all of the above questions, your project is a ‘STANDARD PROJECT’. Go to step 5, complete the trash capture question. E-34 Page 4 of 4 REV 04/23 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: 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) Existing Impervious Area (subset of Parcel Area) ________ Acres (____________ Square Feet) Area to be disturbed by the project (Project Area) ________ Acres (____________ Square Feet) Project Proposed Impervious Area (subset of Project Area) ________ Acres (____________ Square Feet) Project Proposed Pervious Area (subset of Project Area) ________ Acres (____________ Square Feet) Note: Proposed Impervious Area + Proposed Pervious Area = Area to be Disturbed by the Project. This area includes but is not limited to off-site work including public improvements and temporary disturbance such as vehicle and equipment staging areas, construction worker foot traffic, soil/gravel piles, utility trenches, backfill cuts and slope keyways. Description of Existing Site Condition and Drainage Patterns Current Status of the Site (select all that apply): Existing development Previously graded but not built out Agricultural or other non-impervious use Vacant, undeveloped/natural Description / Additional Information: Existing Land Cover Includes (select all that apply): Vegetative Cover Non-Vegetated Pervious Areas Impervious Areas Description / Additional Information: Underlying Soil belongs to Hydrologic Soil Group (select all that apply): NRCS Type A NRCS Type B NRCS Type C NRCS Type D Approximate Depth to Groundwater (GW): GW Depth < 5 feet 5 feet < GW Depth < 10 feet 10 feet < GW Depth < 20 feet GW Depth > 20 feet Existing Natural Hydrologic Features (select all that apply): Watercourses Seeps Springs Wetlands None Description / Additional Information: Description of Existing Site Topography and Drainage [How is storm water runoff conveyed from the site? At a minimum, this description should answer (1) whether existing drainage conveyance is natural or urban; (2) describe existing constructed storm water conveyance systems, if applicable; and (3) is runoff from offsite conveyed through the site? if so, describe]: Description of Proposed Site Development and Drainage Patterns Project Description / Proposed Land Use and/or Activities: List/describe proposed impervious features of the project (e.g., buildings, roadways, parking lots, courtyards, athletic courts, other impervious features): List/describe proposed pervious features of the project (e.g., landscape areas): 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: Identify whether any of the following features, activities, and/or pollutant source areas will be present (select all that apply): On-site storm drain inlets Interior floor drains and elevator shaft sump pumps Interior parking garages Need for future indoor & structural pest control Landscape/Outdoor Pesticide Use Pools, spas, ponds, decorative fountains, and other water features Food service Refuse areas Industrial processes Outdoor storage of equipment or materials Vehicle and Equipment Cleaning Vehicle/Equipment Repair and Maintenance Fuel Dispensing Areas Loading Docks Fire Sprinkler Test Water Miscellaneous Drain or Wash Water Plazas, sidewalks, and parking lots Identification of Receiving Water Pollutants of Concern Describe path of storm water from the project site to the Pacific Ocean (or bay, lagoon, lake or reservoir, as applicable): 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 Identification of Project Site Pollutants Identify pollutants anticipated from the project site based on all proposed use(s) of the site (see Table B.6-1 below): Pollutant Not Applicable to the Project Site Anticipated from the Project Site Also a Receiving Water Pollutant of Concern Sediment Nutrients Heavy Metals Organic Compounds Trash & Debris Oxygen Demanding Substances Oil & Grease Bacteria & Viruses Pesticides TABLE Error! No text of specified style in document.-1. Anticipated and Potential Pollutants Generated by Land Use Type General Pollutant Categories Priority Project Categories Sediment Nutrients Heavy Metals Organic Compounds Trash & Debris Oxygen Demanding Substances Oil & Grease Bacteria & Viruses Pesticides Detached Residential Development X X X X X X X Attached Residential Development X X X P(1) P(2) P X Commercial Development >one acre P(1) P(1) X P(2) X P(5) X P(3) P(5) Heavy Industry X X X X X X Automotive Repair Shops X X(4)(5) X X Restaurants X X X X P(1) Hillside Development >5,000 ft2 X X X X X X Parking Lots P(1) P(1) X X P(1) X P(1) Retail Gasoline Outlets X X X X X Streets, Highways & Freeways X P(1) X X(4) X P(5) X X P(1) X = anticipated P = potential (1) A potential pollutant if landscaping exists onsite. (2) A potential pollutant if the project includes uncovered parking areas. (3) A potential pollutant if land use involves food or animal waste products. (4) Including petroleum hydrocarbons. (5) Including solvents. Trash Capture BMP Requirements The project must meet the following Trash Capture BMP Requirements (see Section 4.4 of the BMP Design Manual): 1) The trash capture BMP is sized for a one-year, one-hour storm event or equivalent storm drain system, and 2) the trash capture BMP captures trash equal or greater to 5mm. Description / Discussion of Trash Capture BMPs: Hydromodification Management Requirements Do hydromodification management requirements apply (see Section 1.6 of the BMP Design Manual)? Yes, hydromodification management flow control structural BMPs required. No, the project will discharge runoff directly to existing underground storm drains discharging directly to water storage reservoirs, lakes, enclosed embayments, or the Pacific Ocean. No, the project will discharge runoff directly to conveyance channels whose bed and bank are concrete-lined all the way from the point of discharge to water storage reservoirs, lakes, enclosed embayments, or the Pacific Ocean. No, the project will discharge runoff directly to an area identified as appropriate for an exemption by the WMAA for the watershed in which the project resides. Description / Additional Information (to be provided if a 'No' answer has been selected above): Critical Coarse Sediment Yield Areas* *This Section only required if hydromodification management requirements apply Based on the maps provided within the WMAA, do potential critical coarse sediment yield areas exist within the project drainage boundaries? Yes No, no critical coarse sediment yield areas to be protected based on WMAA maps If yes, have any of the optional analyses presented in Appendix H of the manual been performed? H.6.1 Site-Specific GLU Analysis H.7 Downstream Systems Sensitivity to Coarse Sediment H.7.3 Coarse Sediment Source Area Verification No optional analyses performed, the project will avoid critical coarse sediment yield areas identified based on WMAA maps If optional analyses were performed, what is the final result? No critical coarse sediment yield areas to be protected based on verification of GLUs onsite. Critical coarse sediment yield areas exist but additional analysis has determined that protection is not required. Documentation attached in Attachment 8 of the SWQMP. Critical coarse sediment yield areas exist and require protection. The project will implement management measures described in Sections H.2, H.3, and H.4 as applicable, and the areas are identified on the SWQMP Exhibit. Discussion / Additional Information: Flow Control for Post-Project Runoff* *This Section only required if hydromodification management requirements apply List and describe point(s) of compliance (POCs) for flow control for hydromodification management (see Section 6.3.1). For each POC, provide a POC identification name or number correlating to the project's HMP Exhibit and a receiving channel identification name or number correlating to the project's HMP Exhibit. Has a geomorphic assessment been performed for the receiving channel(s)? No, the low flow threshold is 0.1Q2 (default low flow threshold) Yes, the result is the low flow threshold is 0.1Q2 Yes, the result is the low flow threshold is 0.3Q2 Yes, the result is the low flow threshold is 0.5Q2 If a geomorphic assessment has been performed, provide title, date, and preparer: Discussion / Additional Information: (optional) Other Site Requirements and Constraints When applicable, list other site requirements or constraints that will influence storm water management design, such as zoning requirements including setbacks and open space, or City codes governing minimum street width, sidewalk construction, allowable pavement types, and drainage requirements. Optional Additional Information or Continuation of Previous Sections As Needed This space provided for additional information or continuation of information from previous sections as needed. 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 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 preventmaterials from contacting rainfall orrunoff? (See Fact Sheet BL-5) Select all feasible BMPs for each work area 3.Where will runoff from thework 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 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: SUMMARY OF PDP STRUCTURAL BMPS PDP Structural BMPs 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). PDP’s subject to trash capture requirements must implement trash capture devices (see Chapter 4 of the BMP Design Manual). Storm water pollutant control, flow control for hydromodification management and trash capture can all be achieved within the same structural BMP(s). PDP 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 and trash capture devices, indicate whether pollutant control, trash capture and flow control BMPs are integrated together or separate. [Continue on next page as necessary.] [Continued from previous page – This page is reserved for continuation of description of general strategy for structural BMP implementation at the site.] Structural BMP Summary Information [Copy this page as needed to provide information for each individual proposed structural BMP] Structural BMP ID No. DWG _________ Sheet No. __________ Type of structural BMP: Retention by harvest and use (HU-1) Retention by infiltration basin (INF-1) Retention by bioretention (INF-2) Retention by permeable pavement (INF-3) Dry Wells (INF-4) Partial retention by biofiltration with partial retention (PR-1) Biofiltration (BF-1) Proprietary Biofiltration (BF-3) Flow-thru treatment control included as pre-treatment/forebay for an onsite retention or biofiltration BMP (provide BMP type/description and indicate which onsite retention or biofiltration BMP it serves in discussion section below) Detention pond or vault for hydromodification management Trash capture device Other (describe in discussion section below) Purpose: Pollutant control only Hydromodification control only Combined pollutant control and hydromodification control Pre-treatment/forebay for another structural BMP Trash Capture Other (describe in discussion section below) Discussion (as needed): Structural BMP Summary Information [Copy this page as needed to provide information for each individual proposed structural BMP] Structural BMP ID No. DWG _________ Sheet No. __________ Type of structural BMP: Retention by harvest and use (HU-1) Retention by infiltration basin (INF-1) Retention by bioretention (INF-2) Retention by permeable pavement (INF-3) Dry Wells (INF-4) Partial retention by biofiltration with partial retention (PR-1) Biofiltration (BF-1) Proprietary Biofiltration (BF-3) Flow-thru treatment control included as pre-treatment/forebay for an onsite retention or biofiltration BMP (provide BMP type/description and indicate which onsite retention or biofiltration BMP it serves in discussion section below) Detention pond or vault for hydromodification management Trash capture device Other (describe in discussion section below) Purpose: Pollutant control only Hydromodification control only Combined pollutant control and hydromodification control Pre-treatment/forebay for another structural BMP Trash Capture Other (describe in discussion section below) Discussion (as needed): Structural BMP Summary Information [Copy this page as needed to provide information for each individual proposed structural BMP] Structural BMP ID No. DWG _________ Sheet No. __________ Type of structural BMP: Retention by harvest and use (HU-1) Retention by infiltration basin (INF-1) Retention by bioretention (INF-2) Retention by permeable pavement (INF-3) Dry Wells (INF-4) Partial retention by biofiltration with partial retention (PR-1) Biofiltration (BF-1) Proprietary Biofiltration (BF-3) Flow-thru treatment control included as pre-treatment/forebay for an onsite retention or biofiltration BMP (provide BMP type/description and indicate which onsite retention or biofiltration BMP it serves in discussion section below) Detention pond or vault for hydromodification management Trash capture device Other (describe in discussion section below) Purpose: Pollutant control only Hydromodification control only Combined pollutant control and hydromodification control Pre-treatment/forebay for another structural BMP Trash Capture Other (describe in discussion section below) Discussion (as needed): Structural BMP Summary Information [Copy this page as needed to provide information for each individual proposed structural BMP] Structural BMP ID No. DWG _________ Sheet No. __________ Type of structural BMP: Retention by harvest and use (HU-1) Retention by infiltration basin (INF-1) Retention by bioretention (INF-2) Retention by permeable pavement (INF-3) Dry Wells (INF-4) Partial retention by biofiltration with partial retention (PR-1) Biofiltration (BF-1) Proprietary Biofiltration (BF-3) Flow-thru treatment control included as pre-treatment/forebay for an onsite retention or biofiltration BMP (provide BMP type/description and indicate which onsite retention or biofiltration BMP it serves in discussion section below) Detention pond or vault for hydromodification management Trash capture device Other (describe in discussion section below) Purpose: Pollutant control only Hydromodification control only Combined pollutant control and hydromodification control Pre-treatment/forebay for another structural BMP Trash Capture Other (describe in discussion section below) Discussion (as needed): Structural BMP Summary Information [Copy this page as needed to provide information for each individual proposed structural BMP] Structural BMP ID No. DWG _________ Sheet No. __________ Type of structural BMP: Retention by harvest and use (HU-1) Retention by infiltration basin (INF-1) Retention by bioretention (INF-2) Retention by permeable pavement (INF-3) Dry Wells (INF-4) Partial retention by biofiltration with partial retention (PR-1) Biofiltration (BF-1) Proprietary Biofiltration (BF-3) Flow-thru treatment control included as pre-treatment/forebay for an onsite retention or biofiltration BMP (provide BMP type/description and indicate which onsite retention or biofiltration BMP it serves in discussion section below) Detention pond or vault for hydromodification management Trash capture device Other (describe in discussion section below) Purpose: Pollutant control only Hydromodification control only Combined pollutant control and hydromodification control Pre-treatment/forebay for another structural BMP Trash Capture Other (describe in discussion section below) Discussion (as needed): Structural BMP Summary Information [Copy this page as needed to provide information for each individual proposed structural BMP] Structural BMP ID No. DWG _________ Sheet No. __________ Type of structural BMP: Retention by harvest and use (HU-1) Retention by infiltration basin (INF-1) Retention by bioretention (INF-2) Retention by permeable pavement (INF-3) Dry Wells (INF-4) Partial retention by biofiltration with partial retention (PR-1) Biofiltration (BF-1) Proprietary Biofiltration (BF-3) Flow-thru treatment control included as pre-treatment/forebay for an onsite retention or biofiltration BMP (provide BMP type/description and indicate which onsite retention or biofiltration BMP it serves in discussion section below) Detention pond or vault for hydromodification management Trash capture device Other (describe in discussion section below) Purpose: Pollutant control only Hydromodification control only Combined pollutant control and hydromodification control Pre-treatment/forebay for another structural BMP Trash Capture Other (describe in discussion section below) Discussion (as needed): Structural BMP Summary Information [Copy this page as needed to provide information for each individual proposed structural BMP] Structural BMP ID No. DWG _________ Sheet No. __________ Type of structural BMP: Retention by harvest and use (HU-1) Retention by infiltration basin (INF-1) Retention by bioretention (INF-2) Retention by permeable pavement (INF-3) Dry Wells (INF-4) Partial retention by biofiltration with partial retention (PR-1) Biofiltration (BF-1) Proprietary Biofiltration (BF-3) Flow-thru treatment control included as pre-treatment/forebay for an onsite retention or biofiltration BMP (provide BMP type/description and indicate which onsite retention or biofiltration BMP it serves in discussion section below) Detention pond or vault for hydromodification management Trash capture device Other (describe in discussion section below) Purpose: Pollutant control only Hydromodification control only Combined pollutant control and hydromodification control Pre-treatment/forebay for another structural BMP Trash Capture Other (describe in discussion section below) Discussion (as needed): Structural BMP Summary Information [Copy this page as needed to provide information for each individual proposed structural BMP] Structural BMP ID No. DWG _________ Sheet No. __________ Type of structural BMP: Retention by harvest and use (HU-1) Retention by infiltration basin (INF-1) Retention by bioretention (INF-2) Retention by permeable pavement (INF-3) Dry Wells (INF-4) Partial retention by biofiltration with partial retention (PR-1) Biofiltration (BF-1) Proprietary Biofiltration (BF-3) Flow-thru treatment control included as pre-treatment/forebay for an onsite retention or biofiltration BMP (provide BMP type/description and indicate which onsite retention or biofiltration BMP it serves in discussion section below) Detention pond or vault for hydromodification management Trash capture device Other (describe in discussion section below) Purpose: Pollutant control only Hydromodification control only Combined pollutant control and hydromodification control Pre-treatment/forebay for another structural BMP Trash Capture Other (describe in discussion section below) Discussion (as needed): Structural BMP Summary Information [Copy this page as needed to provide information for each individual proposed structural BMP] Structural BMP ID No. DWG _________ Sheet No. __________ Type of structural BMP: Retention by harvest and use (HU-1) Retention by infiltration basin (INF-1) Retention by bioretention (INF-2) Retention by permeable pavement (INF-3) Dry Wells (INF-4) Partial retention by biofiltration with partial retention (PR-1) Biofiltration (BF-1) Proprietary Biofiltration (BF-3) Flow-thru treatment control included as pre-treatment/forebay for an onsite retention or biofiltration BMP (provide BMP type/description and indicate which onsite retention or biofiltration BMP it serves in discussion section below) Detention pond or vault for hydromodification management Trash capture device Other (describe in discussion section below) Purpose: Pollutant control only Hydromodification control only Combined pollutant control and hydromodification control Pre-treatment/forebay for another structural BMP Trash Capture Other (describe in discussion section below) Discussion (as needed): Structural BMP Summary Information [Copy this page as needed to provide information for each individual proposed structural BMP] Structural BMP ID No. DWG _________ Sheet No. __________ Type of structural BMP: Retention by harvest and use (HU-1) Retention by infiltration basin (INF-1) Retention by bioretention (INF-2) Retention by permeable pavement (INF-3) Dry Wells (INF-4) Partial retention by biofiltration with partial retention (PR-1) Biofiltration (BF-1) Proprietary Biofiltration (BF-3) Flow-thru treatment control included as pre-treatment/forebay for an onsite retention or biofiltration BMP (provide BMP type/description and indicate which onsite retention or biofiltration BMP it serves in discussion section below) Detention pond or vault for hydromodification management Trash capture device Other (describe in discussion section below) Purpose: Pollutant control only Hydromodification control only Combined pollutant control and hydromodification control Pre-treatment/forebay for another structural BMP Trash Capture Other (describe in discussion section below) Discussion (as needed): Structural BMP Summary Information [Copy this page as needed to provide information for each individual proposed structural BMP] Structural BMP ID No. DWG _________ Sheet No. __________ Type of structural BMP: Retention by harvest and use (HU-1) Retention by infiltration basin (INF-1) Retention by bioretention (INF-2) Retention by permeable pavement (INF-3) Dry Wells (INF-4) Partial retention by biofiltration with partial retention (PR-1) Biofiltration (BF-1) Proprietary Biofiltration (BF-3) Flow-thru treatment control included as pre-treatment/forebay for an onsite retention or biofiltration BMP (provide BMP type/description and indicate which onsite retention or biofiltration BMP it serves in discussion section below) Detention pond or vault for hydromodification management Trash capture device Other (describe in discussion section below) Purpose: Pollutant control only Hydromodification control only Combined pollutant control and hydromodification control Pre-treatment/forebay for another structural BMP Trash Capture Other (describe in discussion section below) Discussion (as needed): Structural BMP Summary Information [Copy this page as needed to provide information for each individual proposed structural BMP] Structural BMP ID No. DWG _________ Sheet No. __________ Type of structural BMP: Retention by harvest and use (HU-1) Retention by infiltration basin (INF-1) Retention by bioretention (INF-2) Retention by permeable pavement (INF-3) Dry Wells (INF-4) Partial retention by biofiltration with partial retention (PR-1) Biofiltration (BF-1) Proprietary Biofiltration (BF-3) Flow-thru treatment control included as pre-treatment/forebay for an onsite retention or biofiltration BMP (provide BMP type/description and indicate which onsite retention or biofiltration BMP it serves in discussion section below) Detention pond or vault for hydromodification management Trash capture device Other (describe in discussion section below) Purpose: Pollutant control only Hydromodification control only Combined pollutant control and hydromodification control Pre-treatment/forebay for another structural BMP Trash Capture Other (describe in discussion section below) Discussion (as needed): Structural BMP Summary Information [Copy this page as needed to provide information for each individual proposed structural BMP] Structural BMP ID No. DWG _________ Sheet No. __________ Type of structural BMP: Retention by harvest and use (HU-1) Retention by infiltration basin (INF-1) Retention by bioretention (INF-2) Retention by permeable pavement (INF-3) Dry Wells (INF-4) Partial retention by biofiltration with partial retention (PR-1) Biofiltration (BF-1) Proprietary Biofiltration (BF-3) Flow-thru treatment control included as pre-treatment/forebay for an onsite retention or biofiltration BMP (provide BMP type/description and indicate which onsite retention or biofiltration BMP it serves in discussion section below) Detention pond or vault for hydromodification management Trash capture device Other (describe in discussion section below) Purpose: Pollutant control only Hydromodification control only Combined pollutant control and hydromodification control Pre-treatment/forebay for another structural BMP Trash Capture Other (describe in discussion section below) Discussion (as needed): Structural BMP Summary Information [Copy this page as needed to provide information for each individual proposed structural BMP] Structural BMP ID No. DWG _________ Sheet No. __________ Type of structural BMP: Retention by harvest and use (HU-1) Retention by infiltration basin (INF-1) Retention by bioretention (INF-2) Retention by permeable pavement (INF-3) Dry Wells (INF-4) Partial retention by biofiltration with partial retention (PR-1) Biofiltration (BF-1) Proprietary Biofiltration (BF-3) Flow-thru treatment control included as pre-treatment/forebay for an onsite retention or biofiltration BMP (provide BMP type/description and indicate which onsite retention or biofiltration BMP it serves in discussion section below) Detention pond or vault for hydromodification management Trash capture device Other (describe in discussion section below) Purpose: Pollutant control only Hydromodification control only Combined pollutant control and hydromodification control Pre-treatment/forebay for another structural BMP Trash Capture Other (describe in discussion section below) Discussion (as needed): ATTACHMENT 1 BACKUP FOR PDP POLLUTANT CONTROL BMPS This is the cover sheet for Attachment 1. Check which Items are Included behind this cover sheet: Attachment Sequence Contents Checklist Attachment 1a DMA Exhibit (Required) See DMA Exhibit Checklist on the back of this Attachment cover sheet. (24”x36” Exhibit typically required) Included Attachment 1b Tabular Summary of DMAs Showing DMA ID matching DMA Exhibit, DMA Area, and DMA Type (Required)* *Provide table in this Attachment OR on DMA Exhibit in Attachment 1a Included on DMA Exhibit in Attachment 1a Included as Attachment 1b, separate from DMA Exhibit Attachment 1c Form K-7, Harvest and Use Feasibility Screening Checklist (Required unless the entire project will use infiltration BMPs) Refer to Appendix B of the BMP Design Manual to complete Form K-7. Included Not included because the entire project will use infiltration BMPs Attachment 1d Infiltration Feasibility Analysis (Required unless the project will use harvest and use BMPs) Refer to Appendix D of the BMP Design Manual. Included Not included because the entire project will use harvest and use BMPs Attachment 1e Pollutant Control BMP Design Worksheets / Calculations (Required) Refer to Appendices B, E, and I of the BMP Design Manual for structural pollutant control and significant site design BMP design guidelines Included Attachment 1f Trash Capture BMP Design Calculations Refer to Appendices J of the BMP Design Manual for Trash capture BMP design guidelines Included Not included because the entire project is not subject to trash capture requirements ATTACHMENT 1A/1B DMA EXHIBIT/TABULAR SUMMARY OF BMPS 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 (if present) Existing topography and impervious areas Existing and proposed site drainage network and connections to drainage offsite Proposed grading Proposed impervious features Proposed design features and surface treatments used to minimize imperviousness Drainage management area (DMA) boundaries, DMA ID numbers, and DMA areas (square footage or acreage), and DMA type (i.e., drains to BMP, self-retaining, or self-mitigating) Structural BMPs (identify location and type of BMP) Tabular DMA Summary CAP PA PA PA PA PA PA PA PA PA PA PA PA PA PA PA PA PA PAPA PA PA PA PA PA PA PA PA PA PAPA PA PA PA PA PA PA PAPA PA PA PA PA PA PA PA PA PA PA PA PA PA PA PAPA PA PA BMP PA PA PA PA PA PA PA PA PA PA PA PA PA PA PA PA PA PA PA PAPAPAPAPAPA PA PA PA PA PA PA BMP PA PA BMP PA PA PA PA PA PA PA BMP BMP PA PAPA PA PA PA PA PA CITY OF CARLSBAD CARLSBAD VILLAGE MIXED USE CITY OF CARLSBAD CARLSBAD VILLAGE MIXED USE ATTACHMENT 1C FORM I-7 HARVEST AND USE FEASIBILITY SCREENING CHECKLIST Appendix K: Forms and Checklists K-2 Jan. 2023 Harvest and Use Feasibility Checklist Form K-7 1. Is there a demand for harvested water (check all that apply) at the project site that is reliably present during the wet season? Toilet and urinal flushing Landscape irrigation Other:______________ 2. If there is a demand; estimate the anticipated average wet season demand over a period of 36 hours. Guidance for planning level demand calculations for toilet/urinal flushing and landscape irrigation is provided in Section B.3.2. [Provide a summary of calculations here] 3. Calculate the DCV using worksheet B-2.1. DCV = __________ (cubic feet) 3a. Is the 36 hour demand greater than or equal to the DCV? . Yes / No 3b. Is the 36 hour demand greater than 0.25DCV but less than the full DCV? Yes / No 3c. Is the 36 hour demand less than 0.25DCV? Yes Harvest and use appears to be feasible. Conduct more detailed evaluation and sizing calculations to confirm that DCV can be used at an adequate rate to meet drawdown criteria. Harvest and use may be feasible. Conduct more detailed evaluation and sizing calculations to determine feasibility. Harvest and use may only be able to be used for a portion of the site, or (optionally) the storage may need to be upsized to meet long term capture targets while draining in longer than 36 hours. Harvest and use is considered to be infeasible. Is harvest and use feasible based on further evaluation? Yes, refer to Appendix E to select and size harvest and use BMPs. No, select alternate BMPs. Note: 36-hour demand calculations are for feasibility analysis only. Once feasibility analysis is complete the applicant may be allowed to use a different drawdown time provided they meet the 80% annual capture standard (refer to B.4.2) and 96-hour vector control drawdown requirement. Landscape Irrigation: Landscaping area = 0.24 ac Assume Mod. Water Use:1470 g/ac/36 hours x 0.24 Ac. = 353 gallons (CF/7.48 gallons) = 48 CF Toilet & urinal flushing: Expected Total Population: 54536 hr Demand = 9.3 gal/res/day x 1.5 days/36 hr x 545 pop = 7603 gallons (CF/7.48 gal) = 1016 CF Total Demand = 48 + 1016 = 1064 CF 7299 ATTACHMENT 1D INFILTRATION FEASIBILITY SUPPORTING DOCUMENTATION Geotechnical Investigation Carlsbad Village Mixed-Use, Carlsbad, California NOVA Project No. 2022210 November 21, 2022 24 8. INFILTRATION FEASIBILITY 8.1. Overview At this time, stormwater BMP locations have not been finalized. NOVA assumes that stormwater BMP facilities will be designed utilizing an underdrain. Two infiltration tests were conducted near the northwestern portion of the site for planning purposes. NOVA evaluated the site using guidance contained in the BMP Manual. Based on the calculated infiltration rates and restriction elements in Table D.1-1 of the BMP Manual (Figure 8-1 below), it is NOVA’s judgement that the site is not suitable for permanent stormwater infiltration due to the potential for groundwater levels within 10 feet below planned stormwater BMPs. Figure 8-1 outlines infiltration restriction considerations for proposed BMP facilities. The SWQMP preparer should review the restriction elements. Figure 8-1. Infiltration Restriction Considerations Geotechnical Investigation Carlsbad Village Mixed-Use, Carlsbad, California NOVA Project No. 2022210 November 21, 2022 25 8.2. Percolation Testing The percolation test wells were pre-soaked by filling the test holes with water to the ground surface level, and testing commenced within a 26-hour window. On the day of testing, two 25-minute trials were conducted in each test well. The pre-soak water percolated more than 6 inches into the soil within 25 minutes. Based on the results of the trials, water levels were recorded every 10 minutes for 1 hour. At the beginning of each test interval, the water level was raised to approximately the same level as the previous tests to maintain a near-constant head during each test period. Table 8-1 summarizes the percolation test conditions and infiltration rates. Table 8-1. Summary of Borehole Percolation Tests Test Location Test Depth (feet) Material at Test Depth Tested Infiltration Rate (in/hr, FS=2)1 P-1 5 Old paralic deposits: silty sand 2.39 P-2 5 Old paralic deposits: silty sand 2.12 Note 1: FS indicates ‘Factor of Safety’ As shown in Table 8-1, a factor of safety (FS) is applied to the infiltration rate (I) determined by the percolation testing. This factor of safety, calculated for this site as FS=2, considers the nature and variability of subsurface materials, as well as the natural tendency of infiltration structures to become less efficient with time. A default factor of safety of 2 is applied for BMPs utilizing an underdrain. The calculated infiltration rates at locations P-1 and P-2 after applying FS = 2 are 2.39 and 2.12 inches per hour, respectively. 8.3. Recommendation for No Infiltration As previously mentioned, due to the relatively high groundwater levels, it is NOVA’s judgment that the site is restricted by elements that cannot be reasonably resolved through site design changes. In our opinion, the site is not suitable for permanent stormwater infiltration. BMP facilities should be lined throughout with an impermeable geomembrane to reduce the potential for water-related distress to adjacent structures or improvements. A subdrain system should be installed at the bottom of BMP facilities. Additionally, BMP facilities should be kept at least 10 feet from structural foundations. ATTACHMENT 1E POLLUTANT CONTROL BMP DESIGN WORKSHEETS/CALCULATIONS Us e t h e f o l l o w i n g t a b l e f o r T a b u l a r D M A S u m m a r y SEE NEXT PAGE FOR CONTINUATION SEE NEXT PAGE FOR CONTINUATION Us e t h e f o l l o w i n g t a b l e f o r T a b u l a r D M A S u m m a r y 4.1912 TREATMENT SWAP TREATMENT SWAP TREATMENT SWAP TREATMENT SWAP Category #Description i ii iii iv v vi vii viii ix x Units 1 Drainage Basin ID or Name Overall Site 2 3A 3B 3C 3D 4A 4B unitless 2 85th Percentile 24-hr Storm Depth 0.58 0.58 0.58 0.58 0.58 0.58 0.58 0.58 inches 3 Impervious Surfaces Not Directed to Dispersion Area (C=0.90) 165,431 4,000 1,475 2,900 24,599 2,775 sq-ft 4 Semi-Pervious Surfaces Not Serving as Dispersion Area (C=0.30)sq-ft 5 Engineered Pervious Surfaces Not Serving as Dispersion Area (C=0.10) 19,937 765 sq-ft 6 Natural Type A Soil Not Serving as Dispersion Area (C=0.10)sq-ft 7 Natural Type B Soil Not Serving as Dispersion Area (C=0.14)sq-ft 8 Natural Type C Soil Not Serving as Dispersion Area (C=0.23)sq-ft 9 Natural Type D Soil Not Serving as Dispersion Area (C=0.30)sq-ft 10 Does Tributary Incorporate Dispersion, Tree Wells, and/or Rain Barrels? Yes No No No No No Yes No No No yes/no 11 Impervious Surfaces Directed to Dispersion Area per SD-B (Ci=0.90) 533 533 sq-ft 12 Semi-Pervious Surfaces Serving as Dispersion Area per SD-B (Ci=0.30)sq-ft 13 Engineered Pervious Surfaces Serving as Dispersion Area per SD-B (Ci=0.10) 536 536 sq-ft 14 Natural Type A Soil Serving as Dispersion Area per SD-B (Ci=0.10)sq-ft 15 Natural Type B Soil Serving as Dispersion Area per SD-B (Ci=0.14)sq-ft 16 Natural Type C Soil Serving as Dispersion Area per SD-B (Ci=0.23)sq-ft 17 Natural Type D Soil Serving as Dispersion Area per SD-B (Ci=0.30)sq-ft 18 Number of Tree Wells Proposed per SD-A # 19 Average Mature Tree Canopy Diameter ft 20 Number of Rain Barrels Proposed per SD-E # 21 Average Rain Barrel Size gal 22 Total Tributary Area 186,437 0 0 4,000 1,475 2,900 1,069 25,364 2,775 0 sq-ft 23 Initial Runoff Factor for Standard Drainage Areas 0.81 0.00 0.00 0.90 0.90 0.90 0.00 0.88 0.90 0.00 unitless 24 Initial Runoff Factor for Dispersed & Dispersion Areas 0.50 0.00 0.00 0.00 0.00 0.00 0.50 0.00 0.00 0.00 unitless 25 Initial Weighted Runoff Factor 0.81 0.00 0.00 0.90 0.90 0.90 0.50 0.88 0.90 0.00 unitless 26 Initial Design Capture Volume 7,299 0 0 174 64 126 26 1,079 121 0 cubic-feet 27 Total Impervious Area Dispersed to Pervious Surface 533 0 0 0 0 0 533 0 0 0 sq-ft 28 Total Pervious Dispersion Area 536 0 0 0 0 0 536 0 0 0 sq-ft 29 Ratio of Dispersed Impervious Area to Pervious Dispersion Area 1.00 n/a n/a n/a n/a n/a 1.00 n/a n/a n/a ratio 30 Adjustment Factor for Dispersed & Dispersion Areas 0.00 1.00 1.00 1.00 1.00 1.00 0.00 1.00 1.00 1.00 ratio 31 Runoff Factor After Dispersion Techniques 0.81 n/a n/a 0.90 0.90 0.90 0.00 0.88 0.90 n/a unitless 32 Design Capture Volume After Dispersion Techniques 7,299 0 0 174 64 126 0 1,079 121 0 cubic-feet 33 Total Tree Well Volume Reduction 0 0 0 0 0 0 0 0 0 0 cubic-feet 34 Total Rain Barrel Volume Reduction 0 0 0 0 0 0 0 0 0 0 cubic-feet 35 Final Adjusted Runoff Factor 0.81 0.00 0.00 0.90 0.90 0.90 0.00 0.88 0.90 0.00 unitless 36 Final Effective Tributary Area 151,014 0 0 3,600 1,328 2,610 0 22,320 2,498 0 sq-ft 37 Initial Design Capture Volume Retained by Site Design Elements 0 0 0 0 0 0 26 0 0 0 cubic-feet 38 Final Design Capture Volume Tributary to BMP 7,299 0 0 174 64 126 0 1,079 121 0 cubic-feet False False Automated Worksheet B.1: Calculation of Design Capture Volume (V2.0) Dispersion Area, Tree Well & Rain Barrel Inputs (Optional) Standard Drainage Basin Inputs Results Tree & Barrel Adjustments Initial Runoff Factor Calculation Dispersion Area Adjustments No Warning Messages Overall Site included to show Volume Retention Compliance Category #Description i ii iii iv v vi vii viii ix x Units 1 Drainage Basin ID or Name Overall Site -2 3A 3B 3C 3D 4A 4B - unitless 2 85th Percentile Rainfall Depth 0.58 - 0.58 0.58 0.58 0.58 0.58 0.58 0.58 - inches 3 Predominant NRCS Soil Type Within BMP Location B B B B B B B B unitless 4 Is proposed BMP location Restricted or Unrestricted for Infiltration Activities? Restricted Restricted Restricted Restricted Restricted Restricted Restricted Restricted unitless 5 Nature of Restriction Groundwater Groundwater Groundwater Groundwater Groundwater Groundwater Groundwater Groundwater unitless 6 Do Minimum Retention Requirements Apply to this Project? Yes Yes Yes Yes Yes Yes Yes Yes yes/no 7 Are Habitable Structures Greater than 9 Stories Proposed? No No No No No No No No yes/no 8 Has Geotechnical Engineer Performed an Infiltration Analysis? Yes Yes Yes Yes Yes Yes Yes Yes yes/no 9 Design Infiltration Rate Recommended by Geotechnical Engineer 0.000 0.000 0.000 0.000 0.000 0.000 0.000 in/hr 10 Design Infiltration Rate Used To Determine Retention Requirements 0.000 - 0.000 0.000 0.000 0.000 0.000 0.000 0.000 - in/hr 11 Percent of Average Annual Runoff that Must be Retained within DMA 4.5% - 4.5% 4.5% 4.5% 4.5% 4.5% 4.5% 4.5% - percentage 12 Fraction of DCV Requiring Retention 0.02 - 0.02 0.02 0.02 0.02 0.02 0.02 0.02 - ratio 13 Required Retention Volume 146 -0 3 1 3 0 22 2 - cubic-feet False False Automated Worksheet B.2: Retention Requirements (V2.0) Advanced Analysis Basic Analysis Result No Warning Messages Overall Site Volume Retention needed Category #Description i ii iii iv v vi vii viii ix x Units 1 Drainage Basin ID or Name Overall Site -2 3A 3B 3C 3D 4A 4B -sq-ft 2 Design Infiltration Rate Recommended 0.000 -0.000 0.000 0.000 0.000 0.000 0.000 0.000 -in/hr 3 Design Capture Volume Tributary to BMP 7,209 -4 174 64 126 0 1,114 121 -cubic-feet 4 Is BMP Vegetated or Unvegetated?Vegetated Vegetated Vegetated Vegetated Vegetated Vegetated unitless 5 Is BMP Impermeably Lined or Unlined?Lined Lined Lined Lined Lined Lined unitless 6 Does BMP Have an Underdrain?Underdrain Underdrain Underdrain Underdrain Underdrain Underdrain unitless 7 Does BMP Utilize Standard or Specialized Media?Standard Standard Standard Standard Standard Standard unitless 8 Provided Surface Area 1,088 120 44 80 750 107 sq-ft 9 Provided Surface Ponding Depth 6 6 6 6 6 6 inches 10 Provided Soil Media Thickness 21 21 21 21 21 21 inches 11 Provided Gravel Thickness (Total Thickness)15 15 15 15 15 15 inches 12 Underdrain Offset 3 3 3 3 3 3 inches 13 Diameter of Underdrain or Hydromod Orifice (Select Smallest)8.00 8.00 8.00 8.00 8.00 8.00 inches 14 Specialized Soil Media Filtration Rate in/hr 15 Specialized Soil Media Pore Space for Retention unitless 16 Specialized Soil Media Pore Space for Biofiltration unitless 17 Specialized Gravel Media Pore Space unitless 18 Volume Infiltrated Over 6 Hour Storm 0 0 0 0 0 0 0 0 0 0 cubic-feet 19 Ponding Pore Space Available for Retention 0.00 1.00 1.00 0.00 0.00 0.00 1.00 0.00 0.00 1.00 unitless 20 Soil Media Pore Space Available for Retention 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 unitless 21 Gravel Pore Space Available for Retention (Above Underdrain)0.00 0.40 0.40 0.00 0.00 0.00 0.40 0.00 0.00 0.40 unitless 22 Gravel Pore Space Available for Retention (Below Underdrain)0.40 0.40 0.40 0.40 0.40 0.40 0.40 0.40 0.40 0.40 unitless 23 Effective Retention Depth 2.25 0.00 0.00 2.25 2.25 2.25 0.00 2.25 2.25 0.00 inches 24 Fraction of DCV Retained (Independent of Drawdown Time)0.03 0.00 0.00 0.13 0.13 0.12 0.00 0.13 0.17 0.00 ratio 25 Calculated Retention Storage Drawdown Time 120 0 0 120 120 120 0 120 120 0 hours 26 Efficacy of Retention Processes 0.04 0.00 0.00 0.15 0.15 0.14 0.00 0.15 0.19 0.00 ratio 27 Volume Retained by BMP (Considering Drawdown Time)261 0 0 26 10 18 0 168 23 0 cubic-feet 28 Design Capture Volume Remaining for Biofiltration 6,948 0 4 148 54 108 0 946 98 0 cubic-feet 29 Max Hydromod Flow Rate through Underdrain 2.8704 0.0000 0.0000 2.8704 2.8704 2.8704 0.0000 2.8704 2.8704 0.0000 cfs 30 Max Soil Filtration Rate Allowed by Underdrain Orifice 113.97 0.00 0.00 1,033.35 2,818.23 1,550.03 0.00 165.34 1,158.90 0.00 in/hr 31 Soil Media Filtration Rate per Specifications 5.00 5.00 5.00 5.00 5.00 5.00 5.00 5.00 5.00 5.00 in/hr 32 Soil Media Filtration Rate to be used for Sizing 5.00 0.00 0.00 5.00 5.00 5.00 0.00 5.00 5.00 0.00 in/hr 33 Depth Biofiltered Over 6 Hour Storm 30.00 0.00 0.00 30.00 30.00 30.00 0.00 30.00 30.00 0.00 inches 34 Ponding Pore Space Available for Biofiltration 1.00 0.00 0.00 1.00 1.00 1.00 0.00 1.00 1.00 0.00 unitless 35 Soil Media Pore Space Available for Biofiltration 0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.20 unitless 36 Gravel Pore Space Available for Biofiltration (Above Underdrain)0.40 0.40 0.40 0.40 0.40 0.40 0.40 0.40 0.40 0.40 unitless 37 Effective Depth of Biofiltration Storage 15.00 0.00 0.00 15.00 15.00 15.00 0.00 15.00 15.00 0.00 inches 38 Drawdown Time for Surface Ponding 1 0 0 1 1 1 0 1 1 0 hours 39 Drawdown Time for Effective Biofiltration Depth 3 0 0 3 3 3 0 3 3 0 hours 40 Total Depth Biofiltered 45.00 0.00 0.00 45.00 45.00 45.00 0.00 45.00 45.00 0.00 inches 41 Option 1 - Biofilter 1.50 DCV: Target Volume 10,422 0 6 222 82 162 0 1,419 147 0 cubic-feet 42 Option 1 - Provided Biofiltration Volume 4,080 0 0 222 82 162 0 1,419 147 0 cubic-feet 43 Option 2 - Store 0.75 DCV: Target Volume 5,211 0 3 111 41 81 0 709 73 0 cubic-feet 44 Option 2 - Provided Storage Volume 1,360 0 0 111 41 81 0 709 73 0 cubic-feet 45 Portion of Biofiltration Performance Standard Satisfied 0.39 0.00 0.00 1.00 1.00 1.00 0.00 1.00 1.00 0.00 ratio 46 Do Site Design Elements and BMPs Satisfy Annual Retention Requirements?Yes -Yes Yes Yes Yes Yes Yes Yes -yes/no 47 Overall Portion of Performance Standard Satisfied (BMP Efficacy Factor)0.43 0.00 0.00 1.00 1.00 1.00 0.00 1.00 1.00 0.00 ratio 48 Deficit of Effectively Treated Stormwater -4,109 n/a -4 0 0 0 n/a 0 0 n/a cubic-feet Retention Calculations Automated Worksheet B.3: BMP Performance (V2.0) False False BMP Inputs Biofiltration Calculations -This BMP does not fully satisfy the performance standards for pollutant control for the drainage area. - BMPs sized at <3% of the effective tributary areas must be accompanied by Reduced Size BMP Maintenance calculations (see last tab). False False Result False False Attention! Sum of all Walled Biofiltration Planters Overall Site Volume Retention met with multiple biofiltration BMPs and SSD-BMPs (See Form I-6 for additional information) Required Volume Retention 144 CF Provided Biofiltration BMP Volume Retention 234 CF + SDD-BMP Volume Retention(See next sheet for calc) 100CF = 324 CF Sum of all Walled Biofiltration Planters & Site Design Dispersion Areas DCV= 234 CF DMA 2&3D treated Via Modular Wetland Unit (See next sheet for sizing calculations) Appendix I: Significant Site Design BMP Sizing Methods & Calculations I-5 Jan. 2023 Step 2: Dispersion Areas Dispersion areas are dedicated pervious areas, typically vegetated, with in-situ soil infiltration capacity for partial or full infiltration (Figure I.3-1). Impervious area dispersion refers to the practice of effectively disconnecting impervious areas from directly draining to the storm drain system by routing runoff from the impervious area onto an adjacent pervious dispersion area. The pervious dispersion area surface may consist of natural in-situ soils, amended soils, or permeable pavement. This appendix discusses natural in-situ soils and amended soils. For permeable pavement dispersion areas, refer to Section 5.2.3. Figure I.3-1 Dispersion Area Schematic When a dispersion area is proposed to be used as a SSD-BMP, the calculated DCV (Line 37 of the SSD-BMP Automated Worksheet I-1 depicted on the previous pages, “Remaining Design Capture Volume Tributary to Tree Well(s)”) must be zero. This is achieved when the ratio of dispersed impervious surface area to total engineered pervious surface and/or natural hydrologic soil group A or B soil dispersion area meets the requirements outlined in Fact Sheet SD-B (2:1 or 1:1 depending on the dispersion area surface and whether hydromodification control applies) and there are no other surfaces within the DMA that contribute to the project DCV, such as surfaces not directed to the dispersion area, semi-pervious surface used as dispersion area, or natural (non-amended) hydrologic soil group C or D soils used as dispersion area. Semi-pervious surfaces and/or natural (non-amended) hydrologic soil group C or D soils that receive runoff from impervious surfaces may be used as a regular site design BMP to reduce DCV but may not be used as a SSD-BMP because they do not reduce DCV to zero. When soils are amended in accordance with Fact Sheet SD-F, this is considered “engineered pervious surface” regardless of the subgrade. Any natural hydrologic soil group or fill soil may be amended in accordance with Fact Sheet SD-F and then be considered engineered pervious surface. Appendix I: Significant Site Design BMP Sizing Methods & Calculations I-6 Jan. 2023 If the dispersion area is used for pollutant control plus hydromodification control, the dispersion area must include amended soil. As a minimum, the top 11 inches of the pervious area must use amended soils in accordance with Fact Sheet SD-F. Table I.3-1 summarizes certain design criteria for the use of dispersion areas as SSD-BMPs and illustrates the difference between the criteria for pollutant control only and for pollutant control plus hydromodification control. Refer to Fact Sheet SD-B for additional requirements applicable to all types of dispersion areas. Table I.3-1 Criteria for use as of Dispersion Areas as SSD-BMPs for Pollutant Control Only vs. Pollutant Control Plus Hydromodification Control SSD-BMP Criteria for Pollutant Control Only Criteria for Pollutant Control Plus Hydromodification Control Dispersion Area (SD- B) • Ratio of impervious area to engineered pervious surface and/or natural hydrologic soil group A soil area is 2:1 or less; OR ratio of impervious area to natural hydrologic soil group B soil area is 1:1 or less • Sheet flow travel length across dispersion area is 10 feet or more* • Slope is less than 5% • Ratio of impervious area to engineered pervious surface area is 1:1 or less • Sheet flow travel length across dispersion area is 10 feet or more* • Slope is less than 5% • The top 11 inches of soil is amended in accordance with Fact Sheet SD-F *Exemption to this minimum travel length criterion may be allowed when the contributing flow path length of the impervious area /pervious area travel length ≤ 2 The dispersion area sheet flow travel length, slope, and amended soil when applicable must be shown on the project plans. When the SSD-BMP Automated Worksheet is used, these characteristics may be documented in SSD-BMP Automated Worksheet I-2: Step 2. Dispersion Area Validation depicted on the following page in addition to the plans. Dispersion areas meeting the SSD-BMP criteria do not need an additional downstream BMP. Dispersion areas not meeting the SSD-BMP criteria can be used as regular site design BMPs to reduce the DCV draining to a tree well just as they can be used to reduce the DCV draining to a structural BMP pursuant to Appendix B. If the project includes tree wells, proceed to Step 3: Tree Wells. Modular Wetland Sizing Calculations 85th percentile 24-hr storm depth from Figure B.1.=0.58 in BMP-ID DCV DCV retained DCV biofiltered DCV flow- thru A (sf) Impervious Area (sf) %IMP C 1.5 x Q (cfs) Treatment Capacity (cfs) Q100 (cfs) BMP Size BMP-1B 2184 0 0 2184 53540 49792 93%0.84 0.311 7.4 MWS-L-8-16 BMP-2 1308 0 0 1308 32009 29832 93%0.85 0.186 3.9 MWS-L-8-8 BMP-3A-D 1834 0 0 1834 51272 41018 80%0.74 0.261 9.8 MWS-L-8-16 BMP-Treatment Swap 632 0 0 632 15194 14434 95%0.86 0.090 2.8 MWS-L-8-8 Notes: 1. Water quality flow rate = 1.5 x 0.2 x C x A 2. Q100 is based on Hydrology Calculation in Drainage Report See BMP detail on BMP Details sheet in Attachment 1 Category #Description i ii iii iv v vi vii viii ix x Units 1 Drainage Basin ID or Name 13A&B unitless 2 85th Percentile 24-hr Storm Depth 0.58 inches 3 Is Hydromodification Control Applicable? No yes/no 4 Impervious Surfaces Not Directed to Dispersion Area (C=0.90) sq-ft 5 Semi-Pervious Surfaces Not Serving as Dispersion Area (C=0.30)sq-ft 6 Engineered Pervious Surfaces Not Serving as Dispersion Area (C=0.10)sq-ft 7 Natural Type A Soil Not Serving as Dispersion Area (C=0.10)sq-ft 8 Natural Type B Soil Not Serving as Dispersion Area (C=0.14)sq-ft 9 Natural Type C Soil Not Serving as Dispersion Area (C=0.23)sq-ft 10 Natural Type D Soil Not Serving as Dispersion Area (C=0.30)sq-ft 11 Does Tributary Incorporate Dispersion and/or Rain Barrels? Yes yes/no 12 Does Tributary Incorporate Tree Wells? No yes/no 13 Impervious Surfaces Directed to Dispersion Area per SD-B (Ci=0.90) 2,163 sq-ft 14 Semi-Pervious Surfaces Serving as Dispersion Area per SD-B (Ci=0.30)sq-ft 15 Engineered Pervious Surfaces Serving as Dispersion Area per SD-B (Ci=0.10) 1,057 sq-ft 16 Natural Type A Soil Serving as Dispersion Area per SD-B (Ci=0.10)sq-ft 17 Natural Type B Soil Serving as Dispersion Area per SD-B (Ci=0.14)sq-ft 18 Natural Type C Soil Serving as Dispersion Area per SD-B (Ci=0.23)sq-ft 19 Natural Type D Soil Serving as Dispersion Area per SD-B (Ci=0.30) 0 sq-ft 20 Number of Rain Barrels Proposed per SD-E # 21 Average Rain Barrel Size gal 22 Total Tributary Area 3,220 0 0 0 0 0 0 0 0 0 sq-ft 23 Initial Runoff Factor for Standard Drainage Areas 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 unitless 24 Initial Runoff Factor for Dispersed & Dispersion Areas 0.64 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 unitless 25 Initial Weighted Runoff Factor 0.64 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 unitless 26 Initial Design Capture Volume 100 0 0 0 0 0 0 0 0 0 cubic-feet 27 Total Impervious Area Dispersed to Pervious Surface 2,163 0 0 0 0 0 0 0 0 0 sq-ft 28 Total Pervious Dispersion Area 1,057 0 0 0 0 0 0 0 0 0 sq-ft 29 Ratio of Dispersed Impervious Area to Pervious Dispersion Area for DCV Reduction 2.00 n/a n/a n/a n/a n/a n/a n/a n/a n/a ratio 30 Adjustment Factor for Dispersed & Dispersion Areas 0.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 ratio 31 Runoff Factor After Dispersion Techniques 0.00 n/a n/a n/a n/a n/a n/a n/a n/a n/a unitless 32 Design Capture Volume After Dispersion Techniques 0 0 0 0 0 0 0 0 0 0 cubic-feet 33 Total Rain Barrel Volume Reduction 0 0 0 0 0 0 0 0 0 0 cubic-feet 34 Final Adjusted Runoff Factor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 unitless 35 Final Effective Tributary Area 0 0 0 0 0 0 0 0 0 0 sq-ft 36 Initial Design Capture Volume Retained by Dispersion Area and Rain Barrel(s) 100 0 0 0 0 0 0 0 0 0 cubic-feet 37 Remaining Design Capture Volume Tributary to Tree Well(s) 0 0 0 0 0 0 0 0 0 0 cubic-feet False False SSD-BMP Automated Worksheet I-1: Step 1. Calculation of Design Capture Volume (V1.0) Standard Drainage Basin Inputs Results No Warning Messages Dispersion Area Adjustment & Rain Barrel Adjustment SSD-BMPs Proposed Dispersion Area & Rain Barrel Inputs (Optional) Initial Runoff Factor Calculation False Dispersion Area SSD-BMP meets total DCV. Sheet flow travel length is less than 10', but the contributing flow path length of the impervious area/ pervious travel length is less than or equal to 2 per Table I.3-1 of the City of Carlsbad 2023 BMP Design Manual Appendices. PLAN VIEW ELEVATION VIEW RIGHT END VIEW LEFT END VIEW SITE SPECIFIC DATA GENERAL NOTES INSTALLATION NOTES STANDARD DETAILSTORMWATER BIOFILTRATION SYSTEMMWS-L-8-8-V FOR PATENT INFORMATION, GO TOwww.ContechES.com/IP PLAN VIEW ELEVATION VIEW RIGHT END VIEW LEFT END VIEW SITE SPECIFIC DATA GENERAL NOTES INSTALLATION NOTES STANDARD DETAILSTORMWATER BIOFILTRATION SYSTEMMWS-L-8-16-V FOR PATENT INFORMATION, GO TOwww.ContechES.com/IP ENGINEERED SOLUTIONS Modular Wetlands® Linear Stormwater Biofiltration Your Contech Team Contech is the leader in stormwater solutions, helping engineers, contractors and owners with infrastructure and land development projects throughout North America. With our responsive team of stormwater experts, local regulatory expertise and flexible solutions, Contech is the trusted partner you can count on for stormwater management solutions. The experts you need to solve your stormwater challenges STORMWATER CONSULTANT It’s my job to recommend the best solution to meet permitting requirements. STORMWATER DESIGN ENGINEER I work with consultants to design the best approved solution to meet your project’s needs. REGULATORY MANAGER I understand the local stormwater regulations and what solutions will be approved. SALES ENGINEER I make sure our solutions meet the needs of the contractor during construction. Contech is your partner in stormwater management solutions Your Contech Team Contech is your partner in stormwater management solutions The Modular Wetlands® Linear is the only biofiltration system to utilize patented horizontal flow, allowing for a small footprint, high treatment capacity, and design versatility. It is also the only biofiltration system that can be routinely installed downstream of storage for additional volume control and treatment. With numerous regulatory approvals, the system’s aesthetic appeal and superior pollutant removal make it the ideal solution for a wide range of stormwater applications, including urban development projects, commercial parking lots, residential streets, mixed-use developments, streetscapes, and more. As cities grow, there is less space for natural solutions to treat stormwater. Contech understands this and is committed to providing compact, Low Impact Development (LID) solutions like the Modular Wetlands Linear to protect our nation’s waterways. Restoring Nature’s Presence in Urban Areas – Modular Wetlands® Linear ENGINEERED SOLUTIONS Using horizontal flow to improve performance 1. PRETREATMENT | Stormwater enters the pretreatment chamber where total suspended solids settle, and trash and debris are contained within the chamber. Stormwater then travels through the pretreatment filter boxes that provide additional treatment. 2. BIOFILTRATION | As water enters the biofiltration chamber, it fills the void space in the chamber’s perimeter. Horizontal forces push the water inward through the biofiltration media, where nutrients and metals are captured. The water then enters the drain pipe to be discharged. 3. DISCHARGE | The specially designed vertical drain pipe and orifice control plate control the flow of water through the media to a level lower than the media’s capacity, ensuring media effectiveness. The water then enters the horizontal drain pipe to be discharged. 4. BYPASS | During peak flows, an internal weir in the side-by-side configuration allows high flows to bypass treatment, eliminating flooding and the need for a separate bypass structure. Bypass is not provided in the end-to end configuration. How the Modular Wetlands® Linear Works 1 2 3 4 21 1 3 4 End View VEGETATION MANHOLE 8’-0”6”6” 4’ - 8 ” 8¹/2” 8” 3 ’ - 3 ¹ / 2 ” C/L 9’-0” CURB OPENING PLANTESTABLISHMENTMEDIA Using horizontal flow to improve performance FEATURE BENEFITS Pretreatment chamber Enhanced pollutant removal, faster maintenance Horizontal flow biofiltration Greater filter surface area Performance verified by both the WA DOE and NJ DEP Superior pollutant capture with confidence Built-in high flow bypass Eliminates flooding and the need for a separate bypass structure Available in multiple configurations and sizes Flexibility to meet site-specific needs Modular Wetlands Linear is approved through numerous local, state and federal programs, including but not limited to: Washington State Department of Ecology TAPE California Water Resources Control Board, Full Capture Certification Virginia Department of Environmental Quality (VA DEQ) New Jersey Department of Environmental Protection (NJDEP) Maryland Department of the Environment - Environmental Site Design (ESD) Rhode Island Department of Environmental Management BMP Texas Commission on Environmental Quality (TCEQ) Atlanta Regional Commission Certification Modular Wetlands® Linear Features and Benefits Select Modular Wetlands® Linear Approvals The Modular Wetlands system offers many different configurations. ENGINEERED SOLUTIONS VEGETATION MANHOLE 8’-0”6”6” 4’ - 8 ” 8¹/2” 8” 3 ’ - 3 ¹ / 2 ” C/L 9’-0” CURB OPENING PLANTESTABLISHMENTMEDIA Modular Wetlands® Linear Maintenance The Modular Wetlands® Linear is a self-contained treatment train. Maintenance requirements for the unit consist of five simple steps that can be completed using a vacuum truck. The system can also be cleaned by hand. Remove trash from the screening device Remove sediment from the separation chamber Periodically replace the pretreatment cartridge filter media Replace the drain down filter media Trim vegetation Most Modular Wetland Linear systems can be cleaned in about thirty minutes. Modular Wetlands® Performance The Modular Wetlands® Linear continues to outperform other treatment methods with superior pollutant removal for TSS, heavy metals, nutrients, and hydrocarbons. The Modular Wetlands® Linear is field-tested on numerous sites across the country and is proven to effectively remove pollutants through a combination of physical, chemical, and biological filtration processes. Multiple configurations allow for easy site integration POLLUTANT OF CONCERN MEDIAN REMOVAL EFFICIENCY MEDIAN EFFLUENT CONCENTRATION (MG/L) Total Suspended Solids (TSS)89%12 Total Phosphorus - TAPE (TP)61%0.041 Nitrogen (TN)23%1 Total Copper (TCu)50%0.006 Total Dissolved Copper 37%0.006 Total Zinc (TZn)66%0.019 Dissolved Zinc 60%0.0148 Motor Oil 79%0.8 Sources: TAPE Field Study - 2012 TAPE Field Study - 2013 Note: Some jurisdictions recognize higher removal rates. Contact your Contech Stormwater Consultant for performance expectations. VEGETATION MANHOLE 8’-0”6”6” 4’ - 8 ” 8¹ / 2 ” 8” 3 ’ - 3 ¹ / 2 ” C/L 9’-0” CURB OPENING PLANTESTABLISHMENTMEDIA VEGETATIONMANHOLE 8’-0”6”6” 4’ - 8 ” 8¹/2” 8” 3 ’ - 3 ¹ / 2 ” C/L 9’-0” CURB OPENING PLANTESTABLISHMENTMEDIA Modular Wetlands® Linear Configurations Multiple system configurations integrate with site hydraulic design and layout ... The Modular Wetlands Linear is offered in multiple configurations to meet site specific needs. This highly versatile system has available “pipe-in” options on most models, along with built-in curb or grated inlets for simple integration into your storm drain design. Curb Inlet The Curb Inlet configuration accepts sheet flow through a curb opening and is commonly used along roadways and parking lots. It can be used in sump or flow-by conditions. Vault The Vault configuration can be used in end-of-the-line installations. Another benefit of the “pipe-in” design is the ability to install the system downstream of underground detention systems to meet water quality volume requirements, or for traffic-rated designs (no plants). Downspout The Downspout configuration is designed to accept a vertical downspout pipe from rooftop and podium areas. Some models have the option of utilizing an internal bypass, simplifying the overall design. The system can be installed as a raised planter, and the exterior can be stuccoed or covered with other finishes to match the look of adjacent buildings. Multiple configurations allow for easy site integration ENGINEERED SOLUTIONS © 2022 Contech Engineered Solutions LLC, a QUIKRETE Company All Rights Reserved. Printed in the USA. A partner you can rely on Few companies offer the wide range of high- quality stormwater resources you can find with us — state-of-the-art products, decades of expertise, and all the maintenance support you need to operate your system cost-effectively. Get social with us: 800-338-1122 | www.ContechES.com NOTHING IN THIS CATALOG SHOULD BE CONSTRUED AS A WARRANTY. APPLICATIONS SUGGESTED HEREIN ARE DESCRIBED ONLY TO HELP READERS MAKE THEIR OWN EVALUATIONS AND DECISIONS, AND ARE NEITHER GUARANTEES NOR WARRANTIES OF SUITABILITY FOR ANY APPLICATION. CONTECH MAKES NO WARRANTY WHATSOEVER, EXPRESS OR IMPLIED, RELATED TO THE APPLICATIONS, MATERIALS, COATINGS, OR PRODUCTS DISCUSSED HEREIN. ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND ALL IMPLIED WARRANTIES OF FITNESS FOR ANY PARTICULAR PURPOSE ARE DISCLAIMED BY CONTECH. SEE CONTECH’S CONDITIONS OF SALE (AVAILABLE AT WWW.CONTECHES.COM/COS) FOR MORE INFORMATION. ENGINEERED SOLUTIONS THE CONTECH WAY Contech® Engineered Solutions provides innovative, cost-effective site solutions to engineers, contractors, and developers on projects across North America. Our portfolio includes bridges, drainage, erosion control, retaining wall, sanitary sewer and stormwater management products. TAKE THE NEXT STEP For more information: www.ContechES.com STORMWATER SOLUTIONS PIPE SOLUTIONS STRUCTURES SOLUTIONS July 2017 GENERAL USE LEVEL DESIGNATION FOR BASIC, ENHANCED, AND PHOSPHORUS TREATMENT For the MWS-Linear Modular Wetland Ecology’s Decision: Based on Modular Wetland Systems, Inc. application submissions, including the Technical Evaluation Report, dated April 1, 2014, Ecology hereby issues the following use level designation: 1. General use level designation (GULD) for the MWS-Linear Modular Wetland Stormwater Treatment System for Basic treatment Sized at a hydraulic loading rate of 1 gallon per minute (gpm) per square foot (sq ft) of wetland cell surface area. For moderate pollutant loading rates (low to medium density residential basins), size the Prefilters at 3.0 gpm/sq ft of cartridge surface area. For high loading rates (commercial and industrial basins), size the Prefilters at 2.1 gpm/sq ft of cartridge surface area. 2. General use level designation (GULD) for the MWS-Linear Modular Wetland Stormwater Treatment System for Phosphorus treatment Sized at a hydraulic loading rate of 1 gallon per minute (gpm) per square foot (sq ft) of wetland cell surface area. For moderate pollutant loading rates (low to medium density residential basins), size the Prefilters at 3.0 gpm/sq ft of cartridge surface area. For high loading rates (commercial and industrial basins), size the Prefilters at 2.1 gpm/sq ft of cartridge surface area. 3. General use level designation (GULD) for the MWS-Linear Modular Wetland Stormwater Treatment System for Enhanced treatment Sized at a hydraulic loading rate of 1 gallon per minute (gpm) per square foot (sq ft) of wetland cell surface area. For moderate pollutant loading rates (low to medium density residential basins), size the Prefilters at 3.0 gpm/sq ft of cartridge surface area. For high loading rates (commercial and industrial basins), size the Prefilters at 2.1 gpm/sq ft of cartridge surface area. 4. Ecology approves the MWS - Linear Modular Wetland Stormwater Treatment System units for Basic, Phosphorus, and Enhanced treatment at the hydraulic loading rate listed above. Designers shall calculate the water quality design flow rates using the following procedures: Western Washington: For treatment installed upstream of detention or retention, the water quality design flow rate is the peak 15-minute flow rate as calculated using the latest version of the Western Washington Hydrology Model or other Ecology-approved continuous runoff model. Eastern Washington: For treatment installed upstream of detention or retention, the water quality design flow rate is the peak 15-minute flow rate as calculated using one of the three methods described in Chapter 2.2.5 of the Stormwater Management Manual for Eastern Washington (SWMMEW) or local manual. Entire State: For treatment installed downstream of detention, the water quality design flow rate is the full 2-year release rate of the detention facility. 5. These use level designations have no expiration date but may be revoked or amended by Ecology, and are subject to the conditions specified below. Ecology’s Conditions of Use: Applicants shall comply with the following conditions: 1. Design, assemble, install, operate, and maintain the MWS – Linear Modular Wetland Stormwater Treatment System units, in accordance with Modular Wetland Systems, Inc. applicable manuals and documents and the Ecology Decision. 2. Each site plan must undergo Modular Wetland Systems, Inc. review and approval before site installation. This ensures that site grading and slope are appropriate for use of a MWS – Linear Modular Wetland Stormwater Treatment System unit. 3. MWS – Linear Modular Wetland Stormwater Treatment System media shall conform to the specifications submitted to, and approved by, Ecology. 4. The applicant tested the MWS – Linear Modular Wetland Stormwater Treatment System with an external bypass weir. This weir limited the depth of water flowing through the media, and therefore the active treatment area, to below the root zone of the plants. This GULD applies to MWS – Linear Modular Wetland Stormwater Treatment Systems whether plants are included in the final product or not. 5. Maintenance: The required maintenance interval for stormwater treatment devices is often dependent upon the degree of pollutant loading from a particular drainage basin. Therefore, Ecology does not endorse or recommend a “one size fits all” maintenance cycle for a particular model/size of manufactured filter treatment device. Typically, Modular Wetland Systems, Inc. designs MWS - Linear Modular Wetland systems for a target prefilter media life of 6 to 12 months. Indications of the need for maintenance include effluent flow decreasing to below the design flow rate or decrease in treatment below required levels. Owners/operators must inspect MWS - Linear Modular Wetland systems for a minimum of twelve months from the start of post-construction operation to determine site-specific maintenance schedules and requirements. You must conduct inspections monthly during the wet season, and every other month during the dry season. (According to the SWMMWW, the wet season in western Washington is October 1 to April 30. According to SWMMEW, the wet season in eastern Washington is October 1 to June 30). After the first year of operation, owners/operators must conduct inspections based on the findings during the first year of inspections. Conduct inspections by qualified personnel, follow manufacturer’s guidelines, and use methods capable of determining either a decrease in treated effluent flowrate and/or a decrease in pollutant removal ability. When inspections are performed, the following findings typically serve as maintenance triggers: Standing water remains in the vault between rain events, or Bypass occurs during storms smaller than the design storm. If excessive floatables (trash and debris) are present (but no standing water or excessive sedimentation), perform a minor maintenance consisting of gross solids removal, not prefilter media replacement. Additional data collection will be used to create a correlation between pretreatment chamber sediment depth and pre-filter clogging (see Issues to be Addressed by the Company section below) 6. Discharges from the MWS - Linear Modular Wetland Stormwater Treatment System units shall not cause or contribute to water quality standards violations in receiving waters. Applicant: Modular Wetland Systems, Inc. Applicant's Address: PO. Box 869 Oceanside, CA 92054 Application Documents: Original Application for Conditional Use Level Designation, Modular Wetland System, Linear Stormwater Filtration System Modular Wetland Systems, Inc., January 2011 Quality Assurance Project Plan: Modular Wetland system – Linear Treatment System performance Monitoring Project, draft, January 2011. Revised Application for Conditional Use Level Designation, Modular Wetland System, Linear Stormwater Filtration System Modular Wetland Systems, Inc., May 2011 Memorandum: Modular Wetland System-Linear GULD Application Supplementary Data, April 2014 Technical Evaluation Report: Modular Wetland System Stormwater Treatment System Performance Monitoring, April 2014. Applicant's Use Level Request: General use level designation as a Basic, Enhanced, and Phosphorus treatment device in accordance with Ecology’s Guidance for Evaluating Emerging Stormwater Treatment Technologies Technology Assessment Protocol – Ecology (TAPE) January 2011 Revision. Applicant's Performance Claims: The MWS – Linear Modular wetland is capable of removing a minimum of 80-percent of TSS from stormwater with influent concentrations between 100 and 200 mg/l. The MWS – Linear Modular wetland is capable of removing a minimum of 50-percent of Total Phosphorus from stormwater with influent concentrations between 0.1 and 0.5 mg/l. The MWS – Linear Modular wetland is capable of removing a minimum of 30-percent of dissolved Copper from stormwater with influent concentrations between 0.005 and 0.020 mg/l. The MWS – Linear Modular wetland is capable of removing a minimum of 60-percent of dissolved Zinc from stormwater with influent concentrations between 0.02 and 0.30 mg/l. Ecology Recommendations: Modular Wetland Systems, Inc. has shown Ecology, through laboratory and field-testing, that the MWS - Linear Modular Wetland Stormwater Treatment System filter system is capable of attaining Ecology's Basic, Total phosphorus, and Enhanced treatment goals. Findings of Fact: Laboratory Testing The MWS-Linear Modular wetland has the: Capability to remove 99 percent of total suspended solids (using Sil-Co-Sil 106) in a quarter-scale model with influent concentrations of 270 mg/L. Capability to remove 91 percent of total suspended solids (using Sil-Co-Sil 106) in laboratory conditions with influent concentrations of 84.6 mg/L at a flow rate of 3.0 gpm per square foot of media. Capability to remove 93 percent of dissolved Copper in a quarter-scale model with influent concentrations of 0.757 mg/L. Capability to remove 79 percent of dissolved Copper in laboratory conditions with influent concentrations of 0.567 mg/L at a flow rate of 3.0 gpm per square foot of media. Capability to remove 80.5-percent of dissolved Zinc in a quarter-scale model with influent concentrations of 0.95 mg/L at a flow rate of 3.0 gpm per square foot of media. Capability to remove 78-percent of dissolved Zinc in laboratory conditions with influent concentrations of 0.75 mg/L at a flow rate of 3.0 gpm per square foot of media. Field Testing Modular Wetland Systems, Inc. conducted monitoring of an MWS-Linear (Model # MWS-L-4-13) from April 2012 through May 2013, at a transportation maintenance facility in Portland, Oregon. The manufacturer collected flow-weighted composite samples of the system’s influent and effluent during 28 separate storm events. The system treated approximately 75 percent of the runoff from 53.5 inches of rainfall during the monitoring period. The applicant sized the system at 1 gpm/sq ft. (wetland media) and 3gpm/sq ft. (prefilter). Influent TSS concentrations for qualifying sampled storm events ranged from 20 to 339 mg/L. Average TSS removal for influent concentrations greater than 100 mg/L (n=7) averaged 85 percent. For influent concentrations in the range of 20-100 mg/L (n=18), the upper 95 percent confidence interval about the mean effluent concentration was 12.8 mg/L. Total phosphorus removal for 17 events with influent TP concentrations in the range of 0.1 to 0.5 mg/L averaged 65 percent. A bootstrap estimate of the lower 95 percent confidence limit (LCL95) of the mean total phosphorus reduction was 58 percent. The lower 95 percent confidence limit of the mean percent removal was 60.5 percent for dissolved zinc for influent concentrations in the range of 0.02 to 0.3 mg/L (n=11). The lower 95 percent confidence limit of the mean percent removal was 32.5 percent for dissolved copper for influent concentrations in the range of 0.005 to 0.02 mg/L (n=14) at flow rates up to 28 gpm (design flow rate 41 gpm). Laboratory test data augmented the data set, showing dissolved copper removal at the design flow rate of 41 gpm (93 percent reduction in influent dissolved copper of 0.757 mg/L). Issues to be addressed by the Company: 1. Modular Wetland Systems, Inc. should collect maintenance and inspection data for the first year on all installations in the Northwest in order to assess standard maintenance requirements for various land uses in the region. Modular Wetland Systems, Inc. should use these data to establish required maintenance cycles. 2. Modular Wetland Systems, Inc. should collect pre-treatment chamber sediment depth data for the first year of operation for all installations in the Northwest. Modular Wetland Systems, Inc. will use these data to create a correlation between sediment depth and pre-filter clogging. Technology Description: Download at http://www.modularwetlands.com/ Contact Information: Applicant: Zach Kent BioClean A Forterra Company. 398 Vi9a El Centro Oceanside, CA 92058 zach.kent@forterrabp.com Applicant website: http://www.modularwetlands.com/ Ecology web link: http://www.ecy.wa.gov/programs/wg/stormwater/newtech/index.html Ecology: Douglas C. Howie, P.E. Department of Ecology Water Quality Program (360) 407-6444 douglas.howie@ecy.wa.gov Revision History Date Revision June 2011 Original use-level-designation document September 2012 Revised dates for TER and expiration January 2013 Modified Design Storm Description, added Revision Table, added maintenance discussion, modified format in accordance with Ecology standard December 2013 Updated name of Applicant April 2014 Approved GULD designation for Basic, Phosphorus, and Enhanced treatment December 2015 Updated GULD to document the acceptance of MWS-Linear Modular Wetland installations with or without the inclusion of plants July 2017 Revised Manufacturer Contact Information (name, address, and email) Appendix F: Biofiltration Standard and Checklist F-3 Jan. 2023 7. Biofiltration BMP must include operations and maintenance design features and planning considerations to provide for continued effectiveness of pollutant and flow control functions. Biofiltration Criteria Checklist The applicant shall provide documentation of compliance with each criterion in this checklist as part of the project submittal. The right column of this checklist identifies the submittal information that is recommended to document compliance with each criterion. Biofiltration BMPs that substantially meet all aspects of Fact Sheets PR-1, BF-1, or BF-3 should still use this checklist; however additional documentation (beyond what is already required for project submittal) should not be required. 1. Biofiltration BMPs shall be allowed to be used only as described in the BMP selection process based on a documented feasibility analysis. Intent: This manual defines a specific prioritization of pollutant treatment BMPs, where BMPs that retain water (retained includes evapotranspired, infiltrated, and/or harvested and used) must be used before considering BMPs that have a biofiltered discharge to the MS4 or surface waters. Use of a biofiltration BMP in a manner in conflict with this prioritization (i.e., without a feasibility analysis justifying its use) is not permitted, regardless of the adequacy of the sizing and design of the system. □ The project applicant has demonstrated that it is not technically feasible to retain the full DCV onsite. Document feasibility analysis and findings in project SWQMP per Appendix D. 2. Biofiltration BMPs must be sized using acceptable sizing methods. Intent: The MS4 Permit and this manual defines specific sizing methods that must be used to size biofiltration BMPs. Sizing of biofiltration BMPs is a fundamental factor in the amount of storm water that can be treated and also influences volume and pollutant retention processes. □ The project applicant has demonstrated that biofiltration BMPs are sized to meet one of the biofiltration sizing options available (Appendix B). Submit sizing worksheets (Appendix B) or other equivalent documentation with the project SWQMP. 3. Biofiltration BMPs must be sited and designed to achieve maximum feasible infiltration and evapotranspiration. Intent: Various decisions about BMP placement and design influence how much water is retained via infiltration and evapotranspiration. The MS4 Permit requires that biofiltration BMPs achieve maximum feasible retention (evapotranspiration and infiltration) of storm water volume. Appendix F: Biofiltration Standard and Checklist F-4 Jan. 2023 □ The biofiltration BMP is sited to allow for maximum infiltration of runoff volume based on the feasibility factors considered in site planning efforts. It is also designed to maximize evapotranspiration through the use of amended media and plants. Document site planning and feasibility analyses in project SWQMP per Section 5.3. □ For biofiltration BMPs categorized as “Partial Infiltration Condition,” the infiltration storage depth in the biofiltration design has been selected to drain in 36 hours (+/-25%) or an alternative value shown to maximize infiltration on the site. Include documentation of estimated infiltration rate per Appendix D; provide calculations using Appendix B.3 to show that the infiltration storage depth meets this criterion. Note, depths that are too shallow or too deep may not be acceptable. □ For biofiltration BMP locations categorized as “Partial Infiltration Condition,” the infiltration storage is over the entire bottom of the biofiltration BMP footprint. Document on plans that the infiltration storage covers the entire bottom of the BMP (i.e., not just underdrain trenches); or an equivalent footprint elsewhere on the site. □ For biofiltration BMP locations categorized as “Partial Infiltration Condition,” the sizing factor used for the infiltration storage area is not less than the minimum biofiltration BMP sizing factors calculated using Worksheet B.3 to achieve 40% average annual percent capture within the BMP or downstream of the BMP. Provide calculations using Worksheet B.3. Note: The infiltration storage area could be a separate storage feature located downstream of the biofiltration BMP, not necessarily within the same footprint. □ An impermeable liner or other hydraulic restriction layer is only used when needed to avoid geotechnical and/or subsurface contamination issues in locations identified as “No Infiltration Condition.” If using an impermeable liner or hydraulic restriction layer, provide documentation of feasibility findings per Appendix D that recommend the use of this feature. □ The use of proprietary biofiltration BMP design2 is permitted only in conditions identified as “No Infiltration Condition” and where site-specific documentation demonstrates that the use of larger footprint biofiltration BMPs would be infeasible. Provide documentation of feasibility findings that recommend no infiltration is feasible. Provide site-specific information to demonstrate that a larger footprint biofiltration BMP would not be feasible. 2 Proprietary biofiltration BMPs are defined as features with infiltration storage footprint less than the minimum sizing factors required to achieve 40% volume retention. Note that if a biofiltration BMP is accompanied by an infiltrating area downstream that has a footprint equal to at least the minimum sizing factors calculated using Appendix F: Biofiltration Standard and Checklist F-5 Jan. 2023 4. Biofiltration BMPs must be designed with a hydraulic loading rate to maximize pollutant retention, preserve pollutant control processes, and minimize potential for pollutant washout. Intent: Various decisions about biofiltration BMP design influence the degree to which pollutants are retained. The MS4 Permit requires that biofiltration BMPs achieve maximum feasible retention of storm water pollutants. □ □ Media selected for the biofiltration BMP meets minimum quality and material specifications, including the maximum allowable design filtration rate and minimum thickness of media. OR Alternatively, for proprietary designs and custom media mixes not meeting the media specifications, field scale testing data are provided to demonstrate that proposed media meets the pollutant treatment performance criteria in Section F.1 below. Provide documentation that media meets the specifications. Provide documentation of performance information as described in Section F.1. □ To the extent practicable, filtration rates are outlet controlled (e.g., via an underdrain and orifice/weir) instead of controlled by the infiltration rate of the media. Include outlet control in designs or provide documentation of why outlet control is not practicable. □ The water surface drains to at least 12 inches below the media surface within 24 hours from the end of storm event flow to preserve plant health and promote healthy soil structure. Include calculations to demonstrate that drawdown rate is adequate. Surface ponding drawdown time greater than 24-hours but less than 96 hours may be allowed at the discretion of the City Engineer if certified by a landscape architect or agronomist. Worksheet B.3 assuming a partial infiltration condition, then it is not considered to be a proprietary biofiltration BMP for the purpose of Item 4 of the checklist. For potential configurations with a higher rate biofiltration BMP upstream of an larger footprint infiltration area, the BMP would still need to comply with Item 5 of this checklist for pollutant treatment effectiveness. Appendix F: Biofiltration Standard and Checklist F-6 Jan. 2023 □ If nutrients are a pollutant of concern, design of the biofiltration BMP follows nutrient- sensitive design criteria. Follow specifications for nutrient sensitive design in Fact Sheet BF-2. Or provide alternative documentation that nutrient treatment is addressed and potential for nutrient release is minimized. □ Media gradation calculations or geotextile selection calculations demonstrate that migration of media between layers will be prevented and permeability will be preserved. Follow specification for choking layer or geotextile in Fact Sheet PR-1 or BF-1. Or include calculations to demonstrate that choking layer is appropriately specified. 5. Biofiltration BMPs must be designed to promote appropriate biological activity to support and maintain treatment processes. Intent: Biological processes are an important element of biofiltration performance and longevity. □ Plants have been selected to be tolerant of project climate, design ponding depths and the treatment media composition. Provide documentation justifying plant selection. Refer to the plant list in Appendix E.21. □ Plants have been selected to minimize irrigation requirements. Provide documentation describing irrigation requirements for establishment and long term operation. □ Plant location and growth will not impede expected long-term media filtration rates and will enhance long term infiltration rates to the extent possible. Provide documentation justifying plant selection. Refer to the plant list in Appendix E.21. 6. Biofiltration BMPs must be designed with a hydraulic loading rate to prevent erosion, scour, and channeling within the BMP. Intent: Erosion, scour, and/or channeling can disrupt treatment processes and reduce biofiltration effectiveness. □ Scour protection has been provided for both sheet flow and pipe inflows to the BMP, where needed. Provide documentation of scour protection as described in Fact Sheets PR-1 or BF-1 or approved equivalent. □ Where scour protection has not been provided, flows into and within the BMP are kept to non-erosive velocities. Provide documentation of design checks for erosive velocities as described in Fact Sheets PR-1 or BF-1 or approved equivalent. Appendix F: Biofiltration Standard and Checklist F-7 Jan. 2023 □ For proprietary BMPs, the BMP is used in a manner consistent with manufacturer guidelines and conditions of its third-party certification3 (i.e., maximum tributary area, maximum inflow velocities, etc., as applicable). Provide copy of manufacturer recommendations and conditions of third- party certification. 7. Biofiltration BMP must include operations and maintenance design features and planning considerations for continued effectiveness of pollutant and flow control functions. Intent: Biofiltration BMPs require regular maintenance in order provide ongoing function as intended. Additionally, it is not possible to foresee and avoid potential issues as part of design; therefore plans must be in place to correct issues if they arise. □ The biofiltration BMP O&M plan describes specific inspection activities, regular/periodic maintenance activities and specific corrective actions relating to scour, erosion, channeling, media clogging, vegetation health, and inflow and outflow structures. Include O&M plan with project submittal as described in Chapter 7. □ Adequate site area and features have been provided for BMP inspection and maintenance access. Illustrate maintenance access routes, setbacks, maintenance features as needed on project water quality plans. □ For proprietary biofiltration BMPs, the BMP maintenance plan is consistent with manufacturer guidelines and conditions of its third-party certification (i.e., maintenance activities, frequencies). Provide copy of manufacturer recommendations and conditions of third- party certification. 3 Certifications or verifications issued by the Washington Technology Acceptance Protocol-Ecology program and the New Jersey Corporation for Advanced Technology programs are typically accompanied by a set of guidelines regarding appropriate design and maintenance conditions that would be consistent with the certification/verification ATTACHMENT 1F TRASH CAPTURE REQUIREMENTS TRASH CAPTURE DEVICES ONSITE ARE ON THE APPROVED WATER BOARD LIST Page 1 of 10 State Water Resources Control Board Certified Trash Full Capture Systems Available to the Public (Updated October 13, 2022) Trash Provisions To qualify as a trash full capture system (System) as described below and satisfy the requirements of the Trash Provisions,1 a System installed after December 2, 2015, must be certified, prior to installation, by the State Water Resources Control Board (State Water Board) Executive Director, or designee, that meets the full capture system definition. The Trash Provisions define a full capture system as a treatment control, or series of treatment controls, including but not limited to, a multi-benefit project or a low impact development control that traps all particles that are 5-millimeter or greater, and has a design treatment capacity that is either: 1. Of not less than the peak flow rate resulting from a one-year, one-hour storm event (design storm) in the subdrainage area, or 2. Appropriately sized and designed to carry at least the same flows as the corresponding storm drain. Consistent with these requirements, the Systems shall not bypass trash below the design storm under maximum operational loading conditions and shall not have a diversion structure present upstream such that a portion of the peak flow is not treated to trap all particles 5-millimeter or greater. Vector Control Accessibility According to the California Health and Safety Code,2 California landowners are legally responsible to abate (eliminate the source of) a public nuisance arising from their property, including mosquitoes. Mosquito vector control districts have substantial authority to access public and private property, inspect known or suspected sources of 1 Amendment to the Water Quality Control Plan for Ocean Waters of California to Control Trash and Part 1 Trash Provisions of the Water Quality Control Plan for Inland Surface Waters, Enclosed Bays, and Estuaries of California adopted by the State Water Board. 2 Health & Safety Code sections 2001-2002, 2060-2067, 100170, and 131075. Certified Trash Full Capture Systems Available to the Public Page 2 of 10 mosquitoes, abate mosquito sources, and charge the landowner for work performed and/or charge fees if a landowner is unwilling or unable to address a mosquito source arising from their property. If not designed properly, a System may impede the mosquito vector control district’s ability to (1) visually inspect the System and/or storm vault for mosquito breeding, and (2) apply the appropriate chemical treatment. Moreover, some Systems may create a habitat for mosquitoes. All the Systems in the tables below have been reviewed and approved by the Mosquito Vector Control Association of California for vector control accessibility. However, prior to installation of any Systems, the local mosquito vector control district should be contacted to ensure the installation conforms to the local district’s visual inspection, treatment, and vector breeding minimizing guidelines. The Mosquito Vector Control Association of California may also be contacted via email at Trashtreatment@mvcac.org. Certified Trash Full Capture System Tables The Systems included in the tables below are: 1) new Systems certified by the State Water Board Executive Director after adoption of the Trash Provisions, and 2) legacy Systems that were certified pursuant to the Trash Provisions include those full capture systems that were listed in Appendix I of the Bay Area-wide Trash Capture Demonstration Project, Final Project Report (May 8, 2014). All Systems remain certified unless and until they are decertified by the State Water Board’s Executive Director or designee. Legacy Systems’ descriptions are included in “fact sheets” that have been updated to address the application requirements for new Systems. The tables do not include the Department of Transportation’s Systems as its Systems are not available to the public. Multi-benefit trash treatment systems are listed separately on the State Water Board’s Trash Implementation webpage at: https://www.waterboards.ca.gov/water_issues/programs/stormwater/trash_implementati on.html. Systems are either identified by their application number or, for legacy Systems, by a fact sheet alpha numeric designation. Please note: Only Systems originally manufactured or distributed by the listed applicants are certified full capture systems. The alphabetical tables of System applicants are divided into two categories: ·Catch Basin Inserts and Other Insert Systems. These Systems typically are inserted into existing stormwater infrastructure; and Certified Trash Full Capture Systems Available to the Public Page 3 of 10 ·High Flow Capacity Trash Full Capture Systems. These Systems are generally self-contained units that typically are not inserted into existing stormwater infrastructure and that are designed to treat trash from large drainage areas. How to Access Certified System Applications and Legacy System Fact Sheets Other than those applications pertaining to the Department of Transportation’s certified Systems, all certified System applications and legacy System fact sheets may be obtained from the California Stormwater Quality Association’s trash webpage at: https://www.casqa.org/resources/trash/certified-full-capture-system-trash-treatment- control-devices. To obtain the Department of Transportation’s certified applications, please contact Leo Cosentini (contact information below). All questions concerning the Trash Provisions and the tables below should be directed to Leo Cosentini by email at Leo.Cosentini@waterboards.ca.gov or by phone at (916) 341-5524. Certified Trash Full Capture Systems Available to the Public Page 4 of 10 TABLE 1. Catch Basin Inserts and Other Insert Systems Applicant/Owner Full Capture System Name Date of Application Certification and Update (if applicable), or Fact Sheet Update Date of Vector Control Accessibility Approval AbTech Industries, Inc.Ultra Urban Filter Curb Opening and Drop-In Application 25 06/30/20 04/8/20 Advanced Drainage Systems, Inc. FLEXSTORM PURE Full Trash Capture Inserts Application 3 03/15/18 Updated 04/21/21 03/30/21 Advanced Drainage Systems, Inc. FLEXSTORM Connector Pipe Screen Fact Sheet ADS-1 Updated 06/08/21 03/30/21 Bio Clean® Environmental Services, Inc. Curb Inlet and Grate Inlet Filters Application 4 03/15/18 Updated 10/21/21 10/20/21 Bio Clean® Environmental Services, Inc. Modular Connector Pipe Trash Screen Fact Sheet BC-3 Updated 04/30/20 03/10/20 BrightWater™Connector Pipe Screen Application 29 03/15/18 Updated 12/29/20 11/19/20 BrightWater™Curb Inlet Filter Application 26 06/30/20 04/17/20 Certified Trash Full Capture Systems Available to the Public Page 8 of 10 TABLE 2. High Flow Capacity Trash Full Capture Systems Applicant/Owner Full Capture System Name Date of Application Certification and Update (if applicable), or Fact Sheet Update Date of Vector Control Accessibility Approval Advanced Drainage Systems, Inc.Barracuda Hydrodynamic Separator Application 21 06/26/19 Updated 05/21/21 03/15/19 AquaShield, Inc.Aqua-Swirl® Stormwater Treatment System Application 1 08/04/17 Updated 11/06/20 12/03/20 Bio Clean® Environmental Services, Inc.Debris Separating Baffle Box Application 6 03/15/18 07/28/20 Bio Clean® Environmental Services, Inc.Bio Clean® Deflective Screening Device Application 20 06/26/19 07/28/20 Bio Clean® Environmental Services, Inc.Modular Wetland System® Application 15 07/10/18 03/15/19 Coanda Inc.Coanda Trash Screen and Debris Fence Fact Sheet COA-1 12/02/15 Updated 09/10/21 09/07/21 ATTACHMENT 2 BACKUP FOR PDP HYDROMODIFICATION CONTROL MEASURES [This is the cover sheet for Attachment 2.] Indicate which Items are Included behind this cover sheet: Attachment Sequence Contents Checklist Attachment 2a Hydromodification Management Exhibit (Required) Included See Hydromodification Management Exhibit Checklist on the back of this Attachment cover sheet. Attachment 2b Management of Critical Coarse Sediment Yield Areas (WMAA Exhibit is required, additional analyses are optional) See Section 6.2 of the BMP Design Manual. Exhibit showing project drainage boundaries marked on WMAA Critical Coarse Sediment Yield Area Map (Required) Optional analyses for Critical Coarse Sediment Yield Area Determination Appendix H.6.1 Verification of Geomorphic Landscape Units Onsite Appendix H.7 Downstream Systems Sensitivity to Coarse Sediment Attachment 2c Geomorphic Assessment of Receiving Channels (Optional) See Section 6.3.4 of the BMP Design Manual. Not performed Included Attachment 2d Flow Control Facility Design and Structural BMP Drawdown Calculations (Required) See Chapter 6 and Appendix G of the BMP Design Manual Included Use this checklist to ensure the required information has been included on the Hydromodification Management Exhibit: The Hydromodification Management Exhibit must identify: Underlying hydrologic soil group Approximate depth to groundwater Existing natural hydrologic features (watercourses, seeps, springs, wetlands) Critical coarse sediment yield areas to be protected (if present) Existing topography Existing and proposed site drainage network and connections to drainage offsite Proposed grading Proposed impervious features Proposed design features and surface treatments used to minimize imperviousness Point(s) of Compliance (POC) for Hydromodification Management Existing and proposed drainage boundary and drainage area to each POC (when necessary, create separate exhibits for pre-development and post-project conditions) Structural BMPs for hydromodification management (identify location, type of BMP, and size/detail) PROJECT IS EXEMPT FROM HYDROMODIFICATION ATTACHMENT 2B MANAGEMENT OF CRITICAL COARSE SEDIMENT YIELD AREAS Pacific Ocean PPAASSEEOOAALLIISSOO CC AA RR LL SS BB AA DD VVIILL LL AA GG EE DD RR AA VV EE NN IIDD AA DD EE LL OO UU IISSAA LAGU N A D R LAGUN A D R DOVE L N DOVE L N CC AA MM II NNII TT OO SS IIEE RR RR AA VVIISSTTAA MMAA RRIIAA NN AA CHINQUA P I N A V CHINQUAP I N A V GGEEOODDEE LLNN PALO M A R A I R P O R T R D PALO M A R A I R P O R T R D LL IINN DD EE NN TT RR AA RREENNAALL RRDD AM B E R W O O D C T AM B E R W O O D C T AD A M S S T AD A M S S T CC AALL LL EE SSUUSSAANNAA PPAASSEE OO PPLLOOMMOO BBRREEAAKKWWAATTEERRRRDD VV IIAA PPUUEE RR TTAA PPIIRRAAGGUUAA SSTT BBEEAACC HH WW OO OO DD CCTT WINDVANE LNWINDVANE LN SSAALLTTIIEECCTT CCHHEESSTTNNUUTT AAVV AAZZAALLEEAA PP LL J A M E S D R JA M E S D R TTEERRRRAA ZZAAPP OO RRTTIICCOO BBLLUUEEBBIIRRDDLLNN ALDER AVALDER A V CCAANNNNOONNRRDD POINSETTIA LNPOINSETTIA LN GRAND A V GRAND A V HEATHER WYHEATHER WYSSAANNCC AA RR LLOOSS AA VV EE NN II DD AA SSOOLLEE DD AA DD SSAANNFFOO RR DD LL NN XX AA NN AA WW YY PP AA SS EE OO AACCAAMM PP OO CC AA MMIINN OO HHIILL LL SS DD RR PP OO II NN SS EETT TT IIAA LLNN H A R D I N G S T H A R D I N G S T DD OO NN JJUUAANN DDRR CIND Y A V CINDY A V BBRRII AA RR WW OOOODD DDRR STER N W Y STERN W Y EEDDGGEEWWAARREE WWYY MM OO NN RR OO EE SS TT BUTTER S R D BUTTER S R D SSOOLLAANNOOSSTT TE L E S C O P E A V TE L E S C O P E A V LL EEXXIINNGG TTOONNCCRR CCAAMMIINNOO CCAAPPIISSTTRRAANNOO NNYYGGAAAARRDDSSTT BBAACCCCHHAARRIISS AAVV SSOORRAA WW YY B R O W N I N G R D B R O W N I N G R D LLAA CCOOSSTTAAAAVV MMIILLTTOONNRR DD PPAALLAACCIIOO DDRR GGRREEEE NN HH AA VV EE NN DD RR SANDSIDE CTSANDSIDE CT TT UU TT TT LLEESSTT LEVAN T E S T LEVA N T E S T CA R L S B A D B L CA R L S B A D B L HOO V E R S T HOO V E R S T EE SSFFEE RR AA SS TT MMOONNTTEECCIITTOO DD RR FFAARRAADDAAYY AA VV MMAALLAACCHHIITTEE PPLL SSEEAAWWAARRDDAAVV SOCO R R O L N SOCOR R O L N RRAANNCCHHOOCCAARRLLSSBBAADDDDRR CCAALLLLEE MM EE JJ OO RR CCOOTTTTAAGGEE DDRR SAND SHELL AVSAND SHELL AV RREEDDKKNNOOTTSSTT CCAAMMIINNOOMMIICCHHEELLLLEE SSPPOOKKAANNEEWWYY CC OO RR TT EE DD EE LL AA VVIISS TT AA TT AA NNZZAANNIITTEEDDRR DDEELLRREEYY AAVV FFRROOSSTTAAVV TTAANNAAGGEERR DDRR PP EE AA CC HH TT RR EE EE RR DD SSUURRFFCCRREESSTTSSTT KKNNOOLL LL WW OOOODD DDRR EEDDIINNBBUURRGGHH DDRR PP AA LL II SS AA DD EE SS DD RR RR UU BB YY WW YY AA BB EE DD UU LL SS TT TT EE RR RR AA ZZAA RRIIBBEERRAA AA VVEENNAA CCTT LANDS E N D C T LANDS E N D C T WW EE SS TTWWOOOODD DDRR DD OO NN MM IIGG UU EE LL DD RR PP AA SS EE OO CC AA PP UU CC HHIINN AA PP OO RRTTAA GG EE WW YY WILSHIRE A VWILSHIRE A V VVIIAA BBAARROONNAA SSWWAA LL LLOOWW LLNN DDOORRAADDOOPPLL BBLLAACCKKSSWWAANN PP LL WWIICCKKHHAAMMWWYY CCAAMMIINNOODDEELLAASSOONNDDAASS BUOY A V BUOY A V NNEEBBLLIINNAADDRR SE A W I N D C T SE A W I N D C T AAMMAARR GG OO SS AA DD RR KK AA RR SS TT RR DD SAN L U C A S SAN L U C A S CCOORRTTEEEESSPPEERRAANNZZAA CC AA MM II NN OO VV II DD AA RR OO BB LL EE CCYYPPRREESSSSAAVV S T A T E S T S T A T E S T SSWWEEEETTWWAATTEERR SSTT AALLOONNDDRRAAWWYY AUBUR N A V AUBUR N A V HHEEAATTHH CCTT PINE AVPINE AV BEECH A V BEECH A V PALM AVPALM A V MMII LL FF OO RRDD PPLL CCAADDEENN CCII AA SS TT CA L L E J A L I S C O CA L L E J A L I S C O RRUUDDDDEERRAAVV LLOOWWDDEERR LL NN BBLLUUFFFF CC TT CC AA MM II NN OO DDEE AAMMIIGG OOSS TH R A S H E R P L TH R A S H E R P L LL AA GG OO LL OO NN DD RR II NN AA SS TT CASSIA R D CASSI A R D CCOONNCCOORRDDSSTT BBUULLRRUUSS HH CC TT VVIICCTTOORRIIAA AAVV CCAALLLLIIAANNDDRR AA RR DD GG AA LL EE NN AA AA VV TW A I N A V T W A I N A V SSIITTIIOO CCAALLIIEENNTTEE GG RR AA NN DD PPAACCIIFFIICC DD RR RU S T I C O D R RU S T I C O D R CCAAMMIINNOOLLIINNDD OO AA LL YY SS SS UU MM RR DD SSHHOORREELLIINNEE DD RR SS HHOORREEBBIIRR DD LLNN HHOOSSPP WWYY DDOONN MM AA TT AA DD RR LLAAUURREELL TTRR EE EE LL NN CCAAZZAADDEERROO DDRR CC OO RR TT EE DDUULLCCEE PP AA NN NN OO NN II AA RRDD SSUUMMMMEERRWWIINNDDPPLL CYNT H I A L N CYNTH I A L N PPLLUUMMTTRREEEERRDD LL OO MM AA LL AA GGUUNNAA DDRR VVEE RRDDEE AAVV PPAARRKKSSIIDDEE PPLL PPAA SS EEOO TTUULLIIPPEERROO R O C K F I E L D C T R O C K F I E L D C T AANNIILLLLOO WWYY KNOW L E S A V KNOW L E S A V RR AANN CC HH OO FFAAMMOOSSAA CCOO RR TTEE PP EENN CCAA PACIFIC A V PACIFIC A V GGRREEBBEE DD RR AARRGGOONNAA UU TTAA SSTT LLII LLIIUUMMLLNN SSIITTIIOO BBAAYYAA CCOORR TTEEVVEERRSSOO CCAAMMIINNOO AALLVVAA RROO GATEWAY R D GATEWAY R D SUTTER S T SUTTE R S T AASSCCOOTT AAVV LLAA NN CC AA SS TT EE RR RRDD CCAARRRRIILLLLOOWWYY FFLLAAMMEE NN CC OO SS TT LO T U S C T LO T U S C T MMAARRLLIINNLLNN AANNDDRREEAA AA VV YYOORRKK RR DD RRAANNCCHHOO PPAA NN CC HHOO HAWTH O R N E A V HAWT H O R N E A V WALNU T A V WALNUT A V HHAALLSSIINNGGCCTT MAGNOLIA A V MAGNOLIA A V LLAA DDUUEELLAALLNN WWHHIITTEECCAAPP DDRR CCAALLLLEETTIIMMIITTEEOO RRAANNCCHHOOBBRRAAVV AA DD OO MM AA DD RR IILL EE NN AA WW YY EESSTTUURRIIOONNSSTT JANIS W Y JANIS W Y DDOOGGWWOOOODDRRDD KI R K P L KI R K P L MMAANNZZAANNIITTAA SSTT CCAALLLLEELLOOMMAASS AAVVEENNIIDDAA HH EE LL EE CCHHOO RROOCCIIOO SSTT MANZANO D R MANZANO D R VVAALLEENNCC IIAA AAVV BBEELLLLEEFFLLOOWWEERRRRDD AN N D R AN N D R FORES T A V FORES T A V CALLE V A L L A R T A CALLE VA L L A R T A LIL A C C T LIL A C C T AAVVEENNIIDDAA NNII EE VV EE SS AA PP PP HH II RR EE DD RR DDOOCCEENNAA RRDD SSEEAABBUURRYYSSTT OO RR II OO NN SSTT WA S H I N G T O N S T WA S H I N G T O N S T SSIIEERR RR AA MM OORR EENNAA AAVV CCAALLLLEE AACCEERRVVOO VVIIAA FFEELLIIZZ AA VV EE NN II DD AA VV AA LLEE RR AA BEAC O N B A Y D R BEAC O N B A Y D R CCRREESSCCEENNTT PPOOIINNTTRRDD LLAARRIIMMAARRAAVV JJEEAANNNN EE PPLL AABBEELLIIAAAAVV SS AA NNDDEERR LLIINN GG CCTT URU B U S T URU B U S T LL LL AA MM AA SS TT SUMMIT TRAIL CTSUMMIT TRAIL CT KK EE SS TT RREELLDD RR EE LL AA GG UU II LL AA SS TT FFAALL CC OONN DDRR AA LL GG AA RR DD BBUUTTTTEERRCCUUPP RR DD TTOOBBRRIIAA TTEE RRRRAACC EE CAL L E C O N I F E R A CAL L E C O N I F E R A RREEDDBBLLUUFFFF PP LL TTOOWWHHEEEELLNN LL AA PP AA LL OO MM AA SS TT AAVVEENNIIDDAA PPAANNTTEERRAA HHAATTAACCAA RRDD IINNVVEERRNN EE SS SS DD RR DDAAVVIISS AAVV DDOONN LL OO RR EE NN ZZ OO DD RR SSAANNDDCCAASSTTLLEEDDRR MMEERRLLIINN DDRR CC OO BBBBLLEESSTTOONN EE RR DD ARUND E L A V ARUNDE L A V CCAAMMIINNOOGGAATTOO SSUU NN BB UU RR SS TT RRDD HOME A V HOME A V CCEE BB UU PP LL FF OO SS CC AA SS TT HHEELLEENNIITTEE PP LL BOB C A T C T BO B C A T C T CCOORRTTEECCAASSTTIILLLLOO GGOOLLDDEENNBBUUSSHHDDRR KIP L I N G L N KI P L I N G L N CALLE DE L S U R CALLE DEL S U R VIA D E F O R T U N A VIA DE F O R T U N A SEA L I O N P L SEA L I O N P L GE I G E R C T GE I G E R C T GGAARRBBOOSSOO SSTT CCAALLLLEECCAANNCCUUNNAA CC II TT RR IINNEEDDRR SS AA UUSSAALLIITTOOAAVV IINNNNOOVVAATTIIOONNWWYY CC AA LL LL EE GGAAVVAANNZZOO AASSTTEERR PPLL OAK AVOAK AV DDAAFFFF OO DD II LL PPLL SSEE AA CC RR EESSTT DD RR HHIIDDDDEENNVVAALLLLEEYY RRDD BB OO LL EE RR OO SSTT CCOONNTTOOUURRPPLL BBUUCCKKIINNGGHHAAMMLLNN WWIINNDD CCRR EESSTT DDRR DDAAVVIIDDPPLL RRIIFFTTRRDD CCLLOOVVEERR CCTT SCO T T D R SCO T T D R TTHHEE CCRROOSSSSIINNGGSSDDRR BBAASSAALLTTOOSSTT WW RRIIGGHHTT PP LL PIRIN E O S W Y PIRI N E O S W Y CCAALLAAVVOO CCTT AVOCADO L N AVOCADO L N AA LL CCYYOONN CCTT BB OONNIITTAA LL NN BB RRIIGG HH TT OONN RR DD PPAACCIIFFIICCOORRDD VVIIAACC AALLAAFFIIAA PP RR II EE SS TT LL YY DD RR PO L L Y L N PO L L Y L N GR E C O U R T W Y GR E C O U R T W Y CCUUMMBBRREECCTT MM OOOORR HH EE NN PPLL MMOONN TTAA NN EE SSLLNN SYCAMO R E A V SYCAMO R E A V NORTH FOR K A V NORTH FOR K A V WH I T E S A I L S T WH I T E S A I L S T AD A I R W Y AD A I R W Y SSPPIINNDDRRIIFFTT LLNN VVIIAA EEMMEERRAADDOO EELLRRAASSTTRROOLLNN BEGO N I A C T BEGO N I A C T RRUUSSSSEELLIIAA CCTT AATTAADDEERROOCCTT EENNCCAANNTTOODDRR SSIITTIIOOCCAASSTTAANNOO CC OO RR TT EE DD EE LL NN OO GG AA LL TIBURO N A V TIBURO N A V NNAA PPLL EE SS CC TT CCOOMMPPAASSSS CCTT PPRRIIMMAAVVEERRAA WW YY AA VV EE NN II DD AA MM AA RR AAVVIILL LLAA FF AALLDDAAPPLL SS AA NN BBEENNIITTOO SSIITTIIOOCCAAUUCCHHOO SC A U P S T SC A U P S T GG RR AA NNIITT EECCTT CC AA LL LL EE AA LL HH EE NN AA AVALON AV AVALON A V MM OO OONN FFIIEELLDD DD RR T Y L E R S T TY L E R S T WWAATTEERRCCOOUURRSSEE DDRR AA VV EE NN IIDD AA DDEE SSUUEENNOO LI N C O L N S T LI N C O L N S T MAPLE A V MAPLE A V SEAHO R S E C T SEAH O R S E C T JACARA N D A A V JACARA N D A A V LEE CTLEE CT ACACIA A V ACACIA A V GA R F I E L D S T GA R F I E L D S T CHERRY A V CHERRY A V HIL L T O P S T HIL L T O P S T OMWD D Y OMWD D Y PPLLAATTEEAAUUPPLL HH OORRIIZZOONN DD RR LLAAMMBBEETTHH CC TT MMAARRCC AA PPLL JUNIPE R A V JUNIPE R A V CCAALLLLEE MMAADDEERROO FF EE RR NNPPLL CCAALLLLEECCOOZZUU MMEELL OO WW EE NN SS AAVV HEMLO C K A V HEMLO C K A V CC OO UU GGAA RR DD RR HH EE MM II NN GG WW AA YY DDRR AAVVIIAA RR AA RREESSOORRTTDDRR CA R C O U N T R Y D R CA R C O U N T R Y D R OLIVE A V OLIVE A V REDWO O D A V REDWO O D A V CCAALLIINNAA WW YY VV AA NN AA LL LL EE NN WW YY TTOOLLKKIIEENN WW YY NAVAR R A D R NAVAR R A D R SSHHEEAARRWWAATTEERR DD RR AA RR AA PP AA HH OO PPLL JJ AA SS PP EE RR WW YY PPAASSEEOO CC AALLLLAADDOO CC HH AA NNCCEERRYYCCTT LATIT U D E L N LATIT U D E L N IIRRIISS CCTT CCAAMMPPHH OO RR PP LL TT RR II GG OO LL NN MCCAUL E Y L N MCCAUL E Y L N TTUUOOLLUUMMNNEEPPLL AARRBBOORRRROOSSEEDDRR MMAARR TT II NNGGAA LLEE CCTT MM EEDDFFOORRDD CCTT LL UU CCIIAACCTT MM EERRMMAAIIDD LLNN DDAARRWWIINN CC TT FR A N C I S C A N R D FR A N C I S C A N R D SSTTOONNEERRIIDDGGEE RRDD NNEEWWLL AA NN DD CC TT OOBBEELLIISSCCOO PPLL NN EEWW TT OO NN DD RR CCAALLLLEE PP OO SS AA DD AA AA SS TT OO NN AA VV BBRRIIGGAANNTTII NN EE DD RR EL M W O O D S T EL M W O O D S T GGEERRAANNIIUUMMSSTT BBRR UU CCEERRDD DATE AVDATE A V CCOORRTTEECCIICCUUTTAA EU C A L Y P T U S L N EU C A L Y P T U S L N YYOOUURREELLLLAAVV CORTE A C I A N O CORTE A C I A N O SSIITTIIOO AAVV EELLLLAANNAA OOLLIIVVEENNHHAAIINNRRDD SSEEAAVVIIEEWWWWYY CCAANNAARRIIOO SS TT SSAANNTTAA CCRRUUZZ TTOOUURRMMAALLIINNEEPPLL PPAASSEEOOPPRRIIVVAADD OO VVIIVVIIEENNDDAACCRR DISCOV E R Y R D DISCO V E R Y R D TRITO N S T TRITO N S T MUS L O L N MUS L O L N PPAA SS EE OO CC AAZZAADDOORR SSOOLLAANN DDRRAA DDRR GG AA ZZ EE LLLLEE CCTT HA R B O R D R HA R B O R D R PPAASS EE OO EE LL EE GG AA NN CC II AA AANNDDOOVVEERR AAVV CC OO LL EE RRIIDD GGEECCTT GGRRUULLLL AA SS TT AANNTT IILLOOPPEESSTT MC K I N L E Y S T MC K I N L E Y S T CCAA LL IIDD RRII SS LLNN CCAAMMPP BBEELLLL PPLL D O N R I C A R D O D R DO N R I C A R D O D R CL E A R V I E W D R CL E A R V I E W D R SSTTRRAATTFFOORRDDLLNN TTEERRNNPPLL JJEERREEZZCCTT JJAASS MMIINN EE CC TT AA RR LL AA NNDD RRDD CC OO RR TT EE DD EE LL FF II NNIIOO RRAAVVIINN EE DDRR PPLLAAZZUU EE LL AA SS TT AA ZZUURR EECCRR SS II TT II OO BB OO RR DD EE S A L K A V S A L K A V FE R M I C T FE R M I C T AAVVEENNIIDDAASSEECCRREETTOO BBRRAANNDDOONNCCRR HHYYAACCIINNTT HHCCRR LI N M A R L N LI N M A R L N MMAARRCCAASSIITTEEPPLL OO LL EE AA LLNN RROOCCKKDDOOVVEESSTT KKEELLLLYY DDRR ZZOODDIIAACCSSTT CC OO LL LL EE GG EE BB LL AA MMAANNTTEE CC TT PPOOPPPPYY LLNN SS EEVV II LL LL AA WW YY PPIINN TT OO RR EE SS CC OO CCTT SS AAVVAANNNNAAHHLLNN CC AA YY EE NN NN EE LL NN OOLLEEAANNDDEERR WWYY LL OOSS RR OOBB LL EE SS DD RR CCHHEESSHHIIRREE AA VV DD RR YYDDEENN PPLL ANCHOR W Y ANCHOR W Y AA TT HH EE NN SS AA VV CCOOLLIIBBRRIILLNN KK II NN GG SSTTOO NN SS TT RREE FF UU GGII OO AA VV CA R L S B A D B L CA R L S B A D B L PPOONNTTOO DDRR BBUUCCKKRRIIDDGGEEAAVV SS II TT II OO CC AA BBAALLLL EE RR OO EEUURREEKKAA PPLL SS AA LL II EENNTTEE WW YY MMEELL AA LL EEUUCCAAAAVV CCOORRVVIIDDAAEE SSTT CCOOSSTTAA DD EE LL MM AA RR RR DD TTIIGG EE RR RR UU NNCCTT KKIINNGGFFIISSHHEERRLL NN PP AA LL OO MM AA RR PP OO II NN TTWWYY AAVVEENNIIDDAA DDEELL AA LL BB AA AZAHAR STAZAHAR ST AA LL TTIIVVAA PPLL RRAANNCCHHOO BBRRAASSAADDOO IIMMPPAALLAADDRR LLIIOONNSSHHEEAADDAAVV W I L S O N S T W I L S O N S T PPEENNIINNSSUU LLAA DD RR WW EE SS TT OOAAKK SS WW YY LAS P A L M A S D R LAS PA L M A S D R LL OO KK EE RR AA VV WW EE SS TT PPAASS EE OO DD EE LL NN OO RR TT EE JJ EE FF FF EE RR SS OO NN SS TT PPAALLMMEERR WWYY EE AA SS YY SS TT NN AA VV II GG AA TTOORRCCRR AA VV EE NNIIDDAADDEE AANNIITTAA LLIIGGHHTTHHOOUUSSEERRDD CCAARRNNAATTIIOONN DDRR BBRRAASSSS PPLL HHIIGG HH LL AA NN DD DDRR SSAANN BB AA RR TT OO LL OO DO N C A R L O S D R DO N C A R L O S D R VVIIAA II RRIISS AA RR GG OO SS YY LLNN LE E W A R D S T LE E W A R D S T LL OO SS PP IINNOOSSCCRR TTAA TT LL EE RR RR DD AALLIICCAANNTTEE RRDD WE S T H A V E N D R WE S T H A V E N D R SSAANN LLUUIISS LAS F L O R E S D R LAS FL O R E S D R NNIICCOO LL II AA DD RR VVIIAA MMOONNTTEEBBEELLLLOO RR IIDDGGEE CC RR EE SSTTDDRR MM UURRIILL LLOO LL NN CCUURRLLEEWWTTEERRRRAACCEE PP EE AA RR TT RR EEEEDDRR NA U T I C A L D R NA U T I C A L D R CO R T E D E L C E D R O CO R T E D E L C E D R O DAISY A V DAISY A V PPIIOO PPIICCOO DDRR AA II DD AA NNCC RR BA T I Q U I T O S D R BA T I Q U I T O S D R WW HHIITT MM AA NN WW YY SSIIMMSSBBUURRYYCCTT LUCIERNAGA STLUCIERNAGA ST GAVIO T A C R GAVIO T A C R MM AA RRIITTIIMMEEDDRR VVEENNAADDOOSSTT CCOOLLUUMM BBIINN EE DDRR O C E A N S T O C E A N S T DO N N A D R DO N N A D R LL AA NN TT AANNAA TTRR SS AA NN DD AA SS TT EE RR DD RR CC AA MMIINN OO CC EE RR EEZZAA WWOO OO DDSSTT OOCC KK SS TT TR I E S T E D R TR I E S T E D R CA M I N I T O S U E N O CA M I N I T O S U E N O PPAALLMMEETTTTOODDRR CCOORRTTEETTAAMMAARRIINNDDOO DDAAYY LL II LLYY DDRR OL Y M P I A D R OL Y M P I A D R BEA C H B L U F F R D BE A C H B L U F F R D PPAASSEEOOAAVVEELLLLAANNOO CC AAYY DDRR KKAA LL MMIIAACCRR MM AARRRROONNRRDD CC OO RR DD OO BBAA PPLL MMAASS TTOODD OO NN CC TT BBEERRGGEENN PP EE AAKK PP LL HHAARRWWIICCHH DDRR TT AA MM AA RR AACC KK AAVV SSPPOOOONNBBIILLLL LLNN EELLCCAAMMIINNOORREEAALL EL C A M I N O R E A L E L C A M I N O R E A L NNEE PPTTUUNNEEDDRR MMEERR WW IINN DDRR QQUUIIEETTCCOOVVEE DD RR HHAALLIITTEE PPLL CC AA SS SS II NN SS SS TT CC OO RR II NN TT II AA SS TT SSOOUUTTHH AAMMPPTT OO NN RRDD PP AA RR KK DDRR CCOORRTTEEBBRREEZZOO CCAALLLLEEAARRRROO YYOO SSNNAAPPDDRRAAGGOONNDDRR CIR C U L O P A P A Y O CIR C U L O P A P A Y O AZ A H A R P L AZ A H A R P L PPAA SS EE OO MMOONNOONNAA PPAASSEEOO CC AA NN DD EELLEERROO TTOOPPMMAASSTTDDRR GG LL AA SS GG OO WW DD RR FF OO OOTTHHIILLLL AAVV CCAALLLLEECCAATTAALLOONNIIAA EEAA SS TT PP OO II NN TT EE AA VV MMIICCAARR DD RR OO SS EE DDRR VV AA LL LL EE YY SS TT CC OORR MMOO RR AA NNTT DDRR AA PPPPII AA NN RR DD LL OO NN GGFFEELLLLOOWWRR DD MM EE AA DD OO WW DDRR SS TT RR AATTAA DD RR HH II BB II SS CC UU SS CC RR LLAAPPIISS RRDD SSKKYYLLIINNEE RR DD GLEN AVGLEN AV SSIITTIIOO MMAANNAANNAA PP OO NN TTIIAA CC DDRR GGOO LL DD SS TTOONN EE RR DD RRAANNCCHHOODDIIAAMM OO NN TT EE CCAALLLLEESSAANNBBLLAASS LLOONNIICCEE RR AA SS TT CCAABBEELLAAPPLL PPOONNTTOO RRDD JJEETTTTYY PPTT MMIIMMOOSSAA DDRR MMAARRIINNEERRSSTT IISSLLEEDDRR PPAALLOOMMAARROOAAKKSS WW YY CC AA LL LL EE PP AALLMMIITTOO AA MM BB RR OO SS II AA LL NN SSAANNTTAACCLLAARRAA WWYY SSEEAAFF AA RR EE RR PPLL HH II GG HH RRIIDDGGEEAAVV RROOCCKKRRIIDDGGEE RRDD QQUUEEBBRRAADDAA CCRR MMAARRSSHHWWRREENNSSTT EELL GGAAVVII LLAANNCCTT C A N Y O N S T C A N Y O N S T OO BB EE LLIISSCCOO CC RR PPAA SS EE OO DD EE SS CC AA NN SS OO CCAACCAATTUUAA SSTT CCAAMMIINNOOSSEERR BBAALL VVIIAA CCOONNQQUUIISSTTAADDOORR CC EE LL II NN DD AA DD RR RRUUSSHH RROOSSEE DD RR CCAAMMIINN OO DDEELL PP RR AADDOO TTUURRQQUUOOIISSEE DDRR SSIILLVVEERRLLEEAA FF CCRR ALANDER CT ALANDER CT RRAANNCCHHOOCCOORRTTEESS KK EE EENNEELL AA NN DD DD RR SSOOMMBBRROOSSAA SSTT PP AA SS EE OO EESSMMEERRAADDOO MMAARRIIPP OO SSAA RRDD IIVVYY SSTT AL V E R T O N D R AL V E R T O N D R BBLLUUEE OO RRCCHHIIDDLLNN TO P I A R Y S T TO P I A R Y S T PPAASSEEOO SSAAUU CC EE DD AALL AAVVEENNIIDDAA LLAA CCIIMMAA CCAAMMIINNOO AARREENNAA AA VV EE NNII DD AA AA NN AA CCAAPPAA BBLLAACCKK RRAAIILL RRDD MA L L E E S T MA L L E E S T WWOOLLVVEERRIINNEETTRR GGAABBBBIIAANNOO LLNN LLIIMMOONNIITTEE CC TT AA VV EE NNIIDDAA CC IIRRUUEELLAA HHAASSTTIINNGGSS DDRR LL AA PP OO RR TT AA LL AA DD AA DD RR CC AA MMIINN OO RR OOBBLLEEDDOO SSEELL LLOOLLNN SSTTEEIINNBB EE CC KK CC TT RRAA NNCCHH OO SS AA NNTT AA FF EE RR DD PPAA SSEE OO PP AA LL EE RROO CCLLIIFFFF CCRR SE G O V I A W Y SE G O V I A W Y SSTTAANNFFOORRDDSSTT CCAAVVEERRNNPPLL SSAAGGEEBBRRUUSSHHRRDD WWIILLDDRROOSSEETTRR CCOORRTTEEPPAANNOORRAAMMAA WW IINNDD RR OO SS EE CCRR DDOONNAALLVVAA RREEZZDDRR CCAA MMIINN OO CC OO RR OO NNAA DD OO OORRIIOOLLEE CCTT MMIILLAANNOO DDRR BB LLEE NN KK AA RR NN EE DD RR CCAAMM II NN OO DDEE LL PPAARRQQUUEE CCIIRRCCUULLOO SSEE QQ UU OO II AA GGOOLLDDEENNSSTTAARRLLNN EESSTTAANNCCIIAA SSTT GGAATTEESSHHEEAADD RRDD AVIARA PYAVIARA PY GGAALLLLEEOONN WWYY TTOORRRR EEYYAANNNNAA CC RR G A L I C I A W Y G A L I C I A W Y PP II NN TT AA II LL DD RR RIMRIM CRCR VV IISS TT AA 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LLAARREE DD OO SS TT YYAARRRROOWWDDRR CO R V A L L I S S T CO R V A L L I S S T SS WWEEEETTBBRR IIAARRCCRR TO P E K A S T TO P E K A S T AA GG UU II LL AASSTT TTIITT AANNIITTEE PP LL RREE PP RREESSAA CC RR LLOONNGGVVIIEEWW DDRR AALLEEXXAA NNDDRRIICCRR CC II RR CC UU LL OO SSAANN TT II AA GG OO SH O R E D R SH O R E D R OORRIIOONN WW YY SSUURRFFBBIIRR DD CC RR CC OO VV EE DDRR RR EE EE FF CC RR SSIITT II OO AALL GGOO DD OO NN CA T A M A R A N D R CA T A M A R A N D R RROO CC KK RROOSSEE TTRR SSII TT II OO OO CC EE AANNOO QQ UU AA IILL PP LL AA RR EENNAALL LLNN TR A D E W I N D S D R TR A D E W I N D S D R TTOO RR RR EEJJOONN PP LL IIVVOORRYY PPLL TT OO RR RR YY CC TT CC AA RRIINNGGAA WWYY CC AA LL LLEE MM AA DD RR IIDD CCIIRRCCUULL OO AADDOO RR NN OO CCRREE SSTT DD RR AAVVIILLAA AAVV CC AATTAA LL PP AA RRDD LLAASSOOLLAASSCCTT RRII SSIINN GGGG LL EE NN WWYY RREEGGEENNTT RRDD CC II TT RR AACCAADDOO CCRR MMAARRBB RR IISSAA CC RR KKEELLLLOOGGGG AAVV VV II LL LL AA GG EE DDRR FL E E T S T FL E E T S T BB AA BB IILL OO NN II AA SSTT FFIILLOO LL II CC RR LLAANNAAKKAAIILLNN EESSTTRREELLLLAA DDEE MM AA RR RRDD Document Path: J:\RequestsMarch2015\ComEconDev\LandDevEng\0004727_15\PCCSYA_ArchE.mxdDate: 06/03/2015 Legend Potential Critical Coarse Sediment Yield Area WMAA Potential Critical Coarse Sediment Yield Areas 0 1,000 2,000 3,000500 FeetI SOURCE: San Diego County Regional Watershed Management Area Analysis," September 8, 2014, prepared by Geosyntec Consultants and Rick Engineering Company PROJECT SITE ATTACHMENT 3 Structural BMP Maintenance Information Use this checklist to ensure the required information has been included in the Structural BMP Maintenance Information Attachment: Preliminary Design/Planning/CEQA level submittal: Attachment 3 must identify: Typical maintenance indicators and actions for proposed structural BMP(s) based on Section 7.7 of the BMP Design Manual Final Design level submittal: Attachment 3 must identify: Specific maintenance indicators and actions for proposed structural BMP(s). This shall be based on Section 7.7 of the BMP Design Manual and enhanced to reflect actual proposed components of the structural BMP(s) How to access the structural BMP(s) to inspect and perform maintenance Features that are provided to facilitate inspection (e.g., observation ports, cleanouts, silt posts, or other features that allow the inspector to view necessary components of the structural BMP and compare to maintenance thresholds) Manufacturer and part number for proprietary parts of structural BMP(s) when applicable Maintenance thresholds for BMPs subject to siltation or heavy trash(e.g., silt level posts or other markings shall be included in all BMP components that will trap and store sediment, trash, and/or debris, so that the inspector may determine how full the BMP is, and the maintenance personnel may determine where the bottom of the BMP is . If required, posts or other markings shall be indicated and described on structural BMP plans.) Recommended equipment to perform maintenance When applicable, necessary special training or certification requirements for inspection and maintenance personnel such as confined space entry or hazardous waste management ATTACHMENT 3 – STRUCTURAL BMP MAINTENANCE PLAN Maintenance of Biofiltration BMP (BF-1) Inspection. Perform pre- and post-rainy season inspections as well as several inspections after significant storm events of the basins for sediment/trash accumulation, inlet and outlet structures, vegetation health, basin erosion and standing water in basins. Typical Maintenance Indicators: • Insufficient cover or patchy in appearance. Areas of bare earth are exposed, or mulch layer is less than 3 inches in depth. • Trash and debris accumulated in area. • Accumulation of sediment. (Overflow inlets should be at least 6 inches above bottom of basin). • Poor vegetation establishment, overgrown vegetation, and presence of weeds. • Erosion due to concentrated irrigation flow or storm water flow. • Clogging at inlet and outlet structures. • Standing water (beyond 96 hours after a rain event) Maintenance Actions: • Remove and replace with fresh mulch as needed. • Remove and dispose of trash and debris properly. • Remove and properly dispose of accumulated materials, without damage to the vegetation. Maintain integrity of side slopes. • Re-seed, re-plant, or re-establish vegetation per original plans. Maintain vegetation health. Mow or trim vegetation as appropriate. Remove weeds. • Inspect soil and repair/re-seed/re-plant eroded areas after big storm events or as needed. Repair energy dissipation (riprap or splashblock). • Clear obstructions causing clogging for inlet and outlet structures using drain snake. • Make appropriate corrective measures such as adjusting irrigation system, removing obstructions of debris or invasive vegetation, unclogging perforated underdrain, 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, the County shall be contacted prior to any additional repairs or reconstruction. Modular Wetland Maintenance: Refer to the attached maintenance guides for maintenance information for the proprietary wetland devices. BrightWater Connector Pipe Screen Maintenance: Refer to the attached maintenance guides for maintenance information for the BrightWater connector pipe screen. ENGINEERED SOLUTIONS Modular Wetlands® Linear Operation & Maintenance Manual 2 MODULAR WETLANDS® LINEAR OPERATION & MAINTENANCE MANUAL TABLE OF CONTENTS Overview ........................................................................................................3 Inspection Summary .......................................................................................4 Inspection Process ..........................................................................................5 Maintenance Indicators ..................................................................................6 Inspection Process ..........................................................................................7 Maintenance Summary ..................................................................................8 Pretreatment Chamber ................................................................9 Prefilter Cartridge ......................................................................10 Biofiltration Chamber ................................................................11 Discharge Chamber ...................................................................12 Inspection Report .........................................................................................13 Cleaning and Maintenance Report ................................................................14 3 OVERVIEW The Modular Wetlands® Linear Biofilter is designed to remove high levels of trash, debris, sediments, nutrients, metals, and hydrocarbons. Its simple design allows for quick and easy installation. The system is housed in a standard precast structure and can be installed at various depths to meet site-specific conditions. INTRODUCTION This is the Modular Wetlands Linear Biofilter operation and maintenance manual. Before starting, read the instructions and equipment lists closely. It is important to follow all necessary safety procedures associated with state and local regulations. Some steps required confined space entry. Please contact Contech for more information on pre-authorized third party contractors who can provide installation services in your area. For a list of service providers in your area please visit: www.conteches.com/maintenance. Pretreatment Chamber Biofiltration Chamber Discharger Chamber Prefilter Box Biofiltration Media Flow Control Riser Vertical Underdrain Outflow Inflow 4 INSTRUCTIONS INSPECTION SUMMARY Stormwater regulations require BMPs be inspected and maintained to ensure they are operating as designed to allow for effective pollutant removal and provide protection to receiving water bodies. It is recommended that inspections be performed multiple times during the first year to assess the site specific loading conditions. The first year of inspections can be used to set inspection and maintenance intervals for subsequent years to ensure appropriate maintenance is provided. •Inspect pre-treatment, biofiltration, and discharge chambers an average of once every six to twelve months. Varies based on site specific and local conditions. •Average inspection time is approximately 15 minutes. Always ensure appropriate safety protocol and procedures are followed. The following is a list of equipment required to allow for simple and effective inspection of the Modular Wetlands Linear: •Modular Wetlands Linear Inspection Form •Flashlight •Manhole hook or appropriate tools to remove access hatches and covers •Appropriate traffic control signage and procedures •Measuring pole and/or tape measure •Protective clothing and eye protection •7/16” open or closed ended wrench •Large permanent black marker (initial inspections only - first year) Note: entering a confined space requires appropriate safety and certification. It is generally not required for routine inspections of the system INSPECTION AND MAINTENANCE NOTES 1. Following maintenance and/or inspection, it is recommended that the maintenance operator prepare a maintenance/inspection record. The record should include any maintenance activities performed, amount and description of debris collected, and condition of the system and its various filter mechanisms. 2. The owner should keep maintenance/inspection record(s) for a minimum of five years from the date of maintenance. These records should be made available to the governing municipality for inspection upon request at any time. 3. Transport all debris, trash, organics, and sediments to approved facility for disposal in accordance with local and state requirements. 4. Entry into chambers may require confined space training based on state and local regulations. 5. No fertilizer shall be used in the biofiltration chamber. 6. Irrigation should be provided as recommended by manufacturer and/or landscape architect. Amount of irrigation required is dependent on plant species. Some plants may not require irrigation after initial establishment. 5 INSPECTION PROCESS 1. Prepare the inspection form by writing in the necessary information including project name, location, date & time, unit number and other information (see inspection form). 2. Observe the inside of the system through the access covers. If minimal light is available and vision into the unit is impaired, utilize a flashlight to see inside the system and all of its chambers. 3. Look for any out of the ordinary obstructions in the inflow pipe, pre-treatment chamber, biofiltration chamber, discharge chamber or outflow pipe. Write down any observations on the inspection form. 4. Through observation and/or digital photographs, estimate the amount of trash, debris accumulated in the pre-treatment chamber. Utilizing a tape measure or measuring stick, estimate the amount of sediment in this chamber. Record this depth on the inspection form. 5. Through visual observation, inspect the condition of the pre-filter cartridges. Look for excessive build-up of sediment on the cartridges, any build-up on the tops of the cartridges, or clogging of the holes. Record this information on the inspection form. The prefilter cartridges can be further inspected by removing the cartridge tops and assessing the color of the BioMediaGREEN filter cubes (requires entry into pre-treatment chamber - see notes previous notes regarding confined space entry). Record the color of the material. New material is a light green color. As the media becomes clogged, it will turn darker in color, eventually becoming dark brown or black. The closer to black the media is the higher percentage that the media is exhausted and is in need of replacement. 6. The biofiltration chamber is generally maintenance-free due to the system’s advanced pre-treatment chamber. For units which have open planters with vegetation, it is recommended that the vegetation be inspected. Look for any plants that are dead or showing signs of disease or other negative stressors. Record the general health of the plants on the inspection form and indicate through visual observation or digital photographs if trimming of the vegetation is required. 7. The discharge chamber houses the orifice control structure, drain down filter (only in California - older models), and is connected to the outflow pipe. It is important to check to ensure the orifice is in proper operating conditions and free of any obstructions. It is also important to assess the condition of the drain down filter media which utilizes a block form of the BioMediaGREEN. Assess in the same manner as the cubes in the pre- filter cartridge as mentioned above. Generally, the discharge chamber will be clean and free of debris. Inspect the water marks on the side walls. If possible, inspect the discharge chamber during a rain event to assess the amount of flow leaving the system while it is at 100% capacity (pre-treatment chamber water level at peak HGL - top of bypass weir). The water level of the flowing water should be compared to the watermark level on the side walls, which is an indicator of the highest discharge rate the system achieved when initially installed. Record on the form if there is any difference in level from the watermark in inches. INSPECTION •Excessive accumulation of sediment in the pre-treatment chamber of more than 6" in depth. •Excessive accumulation of sediment on the BioMediaGREEN media housed within the pre- treatment cartridges. The following chart shows photos of the condition of the BioMediaGREENcontained within the pre-filter cartridges. When media is more than 85% clogged, replacement is required. 7 ©2022 COPYRIGHT | CONTECH ENGINEERED SOLUTIONS INSPECTION •Excessive accumulation of sediment in the pre-treatment chamber of more than 6" in depth. •Excessive accumulation of sediment on the BioMediaGREEN media housed within the pre-treatment cartridges. The following chart shows photos of the condition of the BioMediaGREEN contained within the pre-filter cartridges. When media is more than 85% clogged, replacementis required. 7 ©2022 COPYRIGHT | CONTECH ENGINEERED SOLUTIONS New BioMediaGREEN 0% Exhausted BioMediaGREEN 100%85% 6 MAINTENANCE INDICATORS Based upon the observations made during inspection, maintenance of the system may be required based on the following indicators: •Missing or damaged internal components or cartridges •Obstructions in the system or its inlet and/or outlet pipes •Excessive accumulation of floatables in the pretreatment chamber in which the length and width of the chamber is fully impacted more than 18”. See photo below. •Excessive accumulation of sediment in the pretreatment chamber of more than 6” in depth. •Excessive accumulation of sediment on the BioMediaGREEN media housed within the pretreatment cartridges. The following chart shows photos of the condition of the BioMediaGREEN contained within the pre-filter cartridges. When media is more than 85% clogged, replacement is required. •Excessive accumulation of sediment on the BioMediaGREEN media housed within the pretreatment cartridges. When media is more than 85% clogged, replacement is required. The darker the BioMediaGREEN, the more clogged it is and in need of replacement. INSPECTION MAINTENANCE INDICATORS Based upon the observations made during inspection, maintenance of the system may be required based on the following indicators: •Missing or damaged internal components or cartridges •Obstructions in the system or its inlet and/or outlet pipes•Excessive accumulation of floatables in the pre-treatment chamber in which the length and width of the chamber is fully impacted more than 18". See photo below. 8.Finalize the inspection report for analysis by the maintenance manager to determine if maintenance is required. 6 ©2022 COPYRIGHT | CONTECH ENGINEERED SOLUTIONS INSPECTION •Excessive accumulation of sediment in the pre-treatment chamber of more than 6" in depth. •Excessive accumulation of sediment on the BioMediaGREEN media housed within the pre-treatment cartridges. The following chart shows photos of the condition of the BioMediaGREENcontained within the pre-filter cartridges. When media is more than 85% clogged, replacement is required. 7 ©2022 COPYRIGHT | CONTECH ENGINEERED SOLUTIONS INSPECTION MAINTENANCE INDICATORS Based upon the observations made during inspection, maintenance of the system may be required based on the following indicators: •Missing or damaged internal components or cartridges •Obstructions in the system or its inlet and/or outlet pipes•Excessive accumulation of floatables in the pre-treatment chamber in which the length and width of the chamber is fully impacted more than 18". See photo below. 8.Finalize the inspection report for analysis by the maintenance manager to determine if maintenance is required. 6 ©2022 COPYRIGHT | CONTECH ENGINEERED SOLUTIONS INSPECTION MAINTENANCE INDICATORS Based upon the observations made during inspection, maintenance of the system may be required based on the following indicators: •Missing or damaged internal components or cartridges •Obstructions in the system or its inlet and/or outlet pipes•Excessive accumulation of floatables in the pre-treatment chamber in which the length and width of the chamber is fully impacted more than 18". See photo below. 8.Finalize the inspection report for analysis by the maintenance manager to determine if maintenance is required. 6 ©2022 COPYRIGHT | CONTECH ENGINEERED SOLUTIONS NOTE: During the first few storms, the water level in the outflow chamber should be observed and a 6” long horizontal watermark line drawn (using a large permanent marker) at the water level in the discharge chamber while the system is operating at 100% capacity. The diagram below illustrates where the line should be drawn. This line is a reference point for future inspections of the system. Water level in the discharge chamber is a function of flow rate and pipe size. Observation of the water level during the first few months of operation can be used as a benchmark level for future inspections. The initial mark and all future observations shall be made when the system is at 100% capacity (water level at maximum level in the pre-treatment chamber). If future water levels are below this mark when the system is at 100% capacity, this is an indicator that maintenance to the pre-filter cartridges may be needed. 8. Finalize the inspection report for analysis by the maintenance manager to determine if maintenance is required. 7 INSPECTION PROCESS •Excessive accumulation of sediment on the BioMediaGREEN media housed within the drain down filter (California only - older models). The following photos show the condition of the BioMediaGREEN contained within the drain down filter. When media is more than 85% clogged, replacement is required. •Overgrown vegetation. •Water level in the discharge chamber during 100% operating capacity (pretreatment chamber water level at max height) is lower than the water mark by 20%. INSPECTION •Excessive accumulation of sediment on the BioMediaGREEN media housed within the drain down filter (California only - older models). The following photos show the condition of the BioMediaGREEN contained within the drain down filter. When media is more than 85% clogged, replacement is required. •Overgrown vegetation. •Water level in the discharge chamber during 100% operating capacity (pre-treatment chamber water level at max height) is lower than the watermark by 20%. 8 ©2022 COPYRIGHT | CONTECH ENGINEERED SOLUTIONS INSPECTION •Excessive accumulation of sediment on the BioMediaGREEN media housed within the drain down filter (California only - older models). The following photos show the condition of the BioMediaGREEN contained within the drain down filter. When media is more than 85% clogged, replacement is required. •Overgrown vegetation. •Water level in the discharge chamber during 100% operating capacity (pre-treatment chamber water level at max height) is lower than the watermark by 20%. 8 ©2022 COPYRIGHT | CONTECH ENGINEERED SOLUTIONS 8 MAINTENANCE SUMMARY The time has come to maintain your Modular Wetlands® Linear. All necessary pre-maintenance steps must be carried out before maintenance occurs. Once traffic control has been set up per local and state regulations and access covers have been safely opened, the maintenance process can begin. It should be noted that some maintenance activities require confined space entry. All confined space requirements must be strictly followed before entry into the system. In addition, the following is recommended: •Prepare the maintenance form by writing in the necessary information including project name, location, date & time, unit number and other info (see maintenance form). •Set up all appropriate safety and cleaning equipment. •Ensure traffic control is set up and properly positioned. •Prepared pre-checks (OSHA, safety, confined space entry) are performed. The following is a list of equipment to required for maintenance of the Modular Wetlands® Linear: •Modular Wetlands Linear Maintenance Form •Manhole hook or appropriate tools to access hatches and covers •Protective clothing, flashlight, and eye protection •7/16” open or closed ended wrench •Vacuum assisted truck with pressure washer •Replacement BioMediaGREEN for pre-filter cartridges if required (order from one of Contech’s Maintenance Team members at https://www.conteches.com/maintenance). 9 MAINTENANCE | PRETREATMENT CHAMBER 1. Remove access cover over pre-treatment chamber and position vacuum truck accordingly. 2. With a pressure washer, spray down pollutants accumulated on walls and pre-filter cartridges. 3. Vacuum out pre-treatment chamber and remove all accumulated pollutants including trash, debris, and sediments. Be sure to vacuum the floor until the pervious pavers are visible and clean. 4. If pre-filter cartridges require media replacement, continue to step 5. If not, replace access cover and move to step 11. 1.MAINTENANCE (PRE-TREATMENT CHAMBER)Remove access cover over pre-treatment chamber and position vacuum truck accordingly.2.With a pressure washer, spray down pollutants accumulated on walls and pre-filter cartridges. 3.Vacuum out pre-treatment chamber and remove all accumulated pollutants including trash, debris, and sediments. Be sure to vacuum the floor until the pervious pavers are visible and clean. 4.If pre-filter cartridges require media replacement, move on to next page. If not, replace access cover. 11 ©2022 COPYRIGHT | CONTECH ENGINEERED SOLUTIONS 1.MAINTENANCE (PRE-TREATMENT CHAMBER)Remove access cover over pre-treatment chamber and position vacuum truck accordingly.2.With a pressure washer, spray down pollutants accumulated on walls and pre-filter cartridges. 3.Vacuum out pre-treatment chamber and remove all accumulated pollutants including trash, debris, and sediments. Be sure to vacuum the floor until the pervious pavers are visible and clean. 4.If pre-filter cartridges require media replacement, move on to next page. If not, replace access cover. 11 ©2022 COPYRIGHT | CONTECH ENGINEERED SOLUTIONS 1.MAINTENANCE (PRE-TREATMENT CHAMBER)Remove access cover over pre-treatment chamber and position vacuum truck accordingly.2.With a pressure washer, spray down pollutants accumulated on walls and pre-filter cartridges. 3.Vacuum out pre-treatment chamber and remove all accumulated pollutants including trash, debris, and sediments. Be sure to vacuum the floor until the pervious pavers are visible and clean. 4.If pre-filter cartridges require media replacement, move on to next page. If not, replace access cover. 11 ©2022 COPYRIGHT | CONTECH ENGINEERED SOLUTIONS 1.MAINTENANCE (PRE-TREATMENT CHAMBER)Remove access cover over pre-treatment chamber and position vacuum truck accordingly.2.With a pressure washer, spray down pollutants accumulated on walls and pre-filter cartridges. 3.Vacuum out pre-treatment chamber and remove all accumulated pollutants including trash, debris, and sediments. Be sure to vacuum the floor until the pervious pavers are visible and clean. 4.If pre-filter cartridges require media replacement, move on to next page. If not, replace access cover. 11 ©2022 COPYRIGHT | CONTECH ENGINEERED SOLUTIONS 10 MAINTENANCE | PREFILTER CARTRIDGES 5. After successfully cleaning out the pre-treatment chamber (previous page) enter the pre-treatment chamber. 6. Unscrew the two bolts (circles shown below) holding the lid on each cartridge filter and remove lid. 7. Place the vacuum hose over each individual media filter to suck out filter media. 8. Once filter media has been sucked out, use a pressure washer to spray down the inside of the cartridge and it’s media cages. Remove cleaned media cages and place to the side. Once removed, the vacuum hose can be inserted into the cartridge to vacuum out any remaining material near the bottom of the cartridge. 9. Reinstall media cages and fill with new media from the manufacturer or outside supplier. Manufacturer will provide specification of media and sources to purchase. Utilize the manufacture-provided refilling tray and place on top of the cartridge. Fill the tray with new bulk media and shake down into place. Using your hands, lightly compact the media into each filter cage. Once the cages are full, remove the refilling tray and replace the cartridge top, ensuring bolts are properly tightened. 10. Exit the pre-treatment chamber. Replace access hatch or manhole cover. 1.MAINTENANCE (PRE-FILTER CARTRIDGES) After successfully cleaning out the pre-treatment chamber (previous page) enter the pre-treatment chamber. 2. Unscrew the two bolts (red circles) holding the lid on each cartridge filter and remove lid. 3.Place the vacuum hose over each individual media filter to suck out filter media. 4.Once filter media has been sucked out, use a pressure washer to spray down the inside of the cartridge and it's media cages. Remove cleaned media cages and place to the side. Once removed, the vacuum hose can be inserted into the cartridge to vacuum out any remaining material near the bottom of the cartridge. 12 ©2022 COPYRIGHT | CONTECH ENGINEERED SOLUTIONS 0 0 1. MAINTENANCE (PRE-FILTER CARTRIDGES) After successfully cleaning out the pre-treatment chamber (previous page) enter the pre-treatment chamber. 2. Unscrew the two bolts (red circles) holding the lid on each cartridge filter and remove lid. 3.Place the vacuum hose over each individual media filter to suck out filter media. 4.Once filter media has been sucked out, use a pressure washer to spray down the inside of the cartridge and it's media cages. Remove cleaned media cages and place to the side. Once removed, the vacuum hose can be inserted into the cartridge to vacuum out any remaining material near the bottom of the cartridge. 12 ©2022 COPYRIGHT | CONTECH ENGINEERED SOLUTIONS 0 0 1.MAINTENANCE (PRE-FILTER CARTRIDGES)After successfully cleaning out the pre-treatment chamber (previous page) enter the pre-treatment chamber. 2. Unscrew the two bolts (red circles) holding the lid on each cartridge filter and remove lid. 3.Place the vacuum hose over each individual media filter to suck out filter media. 4.Once filter media has been sucked out, use a pressure washer to spray down the inside of the cartridge and it's media cages. Remove cleaned media cages and place to the side. Once removed, the vacuum hose can be inserted into the cartridge to vacuum out any remaining material near the bottom of the cartridge. 12 ©2022 COPYRIGHT | CONTECH ENGINEERED SOLUTIONS 0 0 5. MAINTENANCE (PRE-FILTER CARTRIDGES) Reinstall media cages and fill with new media from the manufacturer or outside supplier. Manufacturer will provide specification of media and sources to purchase. utilize the manufacture-provided refilling tray and place on top of the cartridge. Fill the tray with new bulk media and shake down into place. using your hands, lightly compact the media into each filter cage. Once the cages are full, remove the refilling tray and replace the cartridge top, ensuring bolts are properly tightened. 6.Exit the pre-treatment chamber. Replace access hatch or manhole cover. 13 ©2022 COPYRIGHT | CONTECH ENGINEERED SOLUTIONS 5. MAINTENANCE (PRE-FILTER CARTRIDGES) Reinstall media cages and fill with new media from the manufacturer or outside supplier. Manufacturer will provide specification of media and sources to purchase. utilize the manufacture-provided refilling tray and place on top of the cartridge. Fill the tray with new bulk media and shake down into place. using your hands, lightly compact the media into each filter cage. Once the cages are full, remove the refilling tray and replace the cartridge top, ensuring bolts are properly tightened. 6.Exit the pre-treatment chamber. Replace access hatch or manhole cover. 13 ©2022 COPYRIGHT | CONTECH ENGINEERED SOLUTIONS 5. MAINTENANCE (PRE-FILTER CARTRIDGES) Reinstall media cages and fill with new media from the manufacturer or outside supplier. Manufacturer will provide specification of media and sources to purchase. utilize the manufacture-provided refilling tray and place on top of the cartridge. Fill the tray with new bulk media and shake down into place. using your hands, lightly compact the media into each filter cage. Once the cages are full, remove the refilling tray and replace the cartridge top, ensuring bolts are properly tightened. 6.Exit the pre-treatment chamber. Replace access hatch or manhole cover. 13 ©2022 COPYRIGHT | CONTECH ENGINEERED SOLUTIONS 11 MAINTENANCE | BIOFILTRATION CHAMBER 11. In general, the biofiltration chamber is maintenance-free with the exception of maintaining the vegetation. The Modular Wetlands Linear utilizes vegetation similar to surrounding landscape areas, therefore trim vegetation to match surrounding vegetation. If any plants have died, replace them with new ones. 12. Each vertical under drain on the biofiltration chamber has a removable (threaded cap) that can be taken off to check any blockages or root growth. Once removed, a jetting attachment can be used to clean out the under drain and orifice riser. 13. As with all biofilter systems, at some point the biofiltration media (WetlandMedia) will need to be replaced. Either because of physical clogging of sorptive exhaustion of the media ion exchange capacity (to remove dissolved metals and phosphorous). The general life of this media is 10 to 20 years based on site specific conditions and pollutant loading. Utilize the vacuum truck to vacuum out the media by placing the hose into the chamber. Once all the media is removed use the power washer to spray down all the netting on the outer metal cage. Inspect the netting for any damage or holes. If the netting is damaged it can be repaired or replaced with guidance by the manufacturer. 14. Contact one of Contech’s Maintenance Team members at https://www.conteches.com/maintenance to order new WetlandMedia. The quantity of media needed can be determined by providing the model number and unit depth. Media will be provided in super sacks for easy installation. Each sack will weigh between 1000 and 2000 lbs. A lifting apparatus (backhoe, boom truck, or other) is recommended to position the super sack over the biofiltration chamber. Fill the media cages up to the same level as the old media. Replant with vegetation. 1.MAINTENANCE (BIOFILTRATION CHAMBER)In general, the biofiltration chamber is maintenance-free with the exception of maintaining the vegetation. Using standard gardening tools, properly trim back the vegetation to healthy levels. The MW Linear™ utilizes vegetation similar to surrounding landscape areas, therefore trim vegetation to match surrounding vegetation. If any plants have died, replace them with new ones. 14 ©2022 COPYRIGHT | CONTECH ENGINEERED SOLUTIONS 3.As with all biofilter systems, at some point the biofiltration media (WetlandMedia) will need to be replaced. Either because of physical clogging of sorptive exhaustion of the media ion exchange capacity (to remove dissolved metals and phosphorous). The general life of this media is 10 to 20 years based on site specific conditions and pollutant loading. Utilize the vacuum truck to vacuum out the media by placing the hose into the chamber. Once all the media is removed use the power washer to spray down all the netting on the outer metal cage. Inspect the netting for any damage or holes. If the netting is damaged it can be repaired or re- placed with guidance by the manufacturer. 4.The first step is to contact the manufacturer and order new WetlandMedia. The quantity of media needed can be determined by providing the model number and unit depth. Media will be provided in super sacks for easy installation. Each sack will weigh between 1000 and 2000 lbs. A lifting apparatus (backhoe, boom truck, or other) is rec-ommended to position the super sack over the biofiltration chamber. Fill the media cages up to the same level as the old media. Replant with vegetation. 2.Each vertical under drain on the biofiltration chamber has a removable (threaded) that can be taken off to check any blockages or root growth. Once removed a a jetting attachment can be used to clean out the under drain and orifice riser. 1.MAINTENANCE (BIOFILTRATION CHAMBER)In general, the biofiltration chamber is maintenance-free with the exception of maintaining the vegetation. Using standard gardening tools, properly trim back the vegetation to healthy levels. The MW Linear™ utilizes vegetation similar to surrounding landscape areas, therefore trim vegetation to match surrounding vegetation. If any plants have died, replace them with new ones. 14 ©2022 COPYRIGHT | CONTECH ENGINEERED SOLUTIONS 3.As with all biofilter systems, at some point the biofiltration media (WetlandMedia) will need to be replaced. Either because of physical clogging of sorptive exhaustion of the media ion exchange capacity (to remove dissolved metals and phosphorous). The general life of this media is 10 to 20 years based on site specific conditions and pollutant loading. Utilize the vacuum truck to vacuum out the media by placing the hose into the chamber. Once all the media is removed use the power washer to spray down all the netting on the outer metal cage. Inspect the netting for any damage or holes. If the netting is damaged it can be repaired or re- placed with guidance by the manufacturer. 4.The first step is to contact the manufacturer and order new WetlandMedia. The quantity of media needed can be determined by providing the model number and unit depth. Media will be provided in super sacks for easy installation. Each sack will weigh between 1000 and 2000 lbs. A lifting apparatus (backhoe, boom truck, or other) is rec-ommended to position the super sack over the biofiltration chamber. Fill the media cages up to the same level as the old media. Replant with vegetation. 2.Each vertical under drain on the biofiltration chamber has a removable (threaded) that can be taken off to check any blockages or root growth. Once removed a a jetting attachment can be used to clean out the under drain and orifice riser.1. MAINTENANCE (BIOFILTRATION CHAMBER) In general, the biofiltration chamber is maintenance-free with the exception of maintaining the vegetation. Using standard gardening tools, properly trim back the vegetation to healthy levels. The MW Linear™ utilizes vegetation similar to surrounding landscape areas, therefore trim vegetation to match surrounding vegetation. If any plants have died, replace them with new ones. 14 ©2022 COPYRIGHT | CONTECH ENGINEERED SOLUTIONS 3.As with all biofilter systems, at some point the biofiltration media (WetlandMedia) will need to be replaced. Either because of physical clogging of sorptive exhaustion of the media ion exchange capacity (to remove dissolved metals and phosphorous). The general life of this media is 10 to 20 years based on site specific conditions and pollutant loading. Utilize the vacuum truck to vacuum out the media by placing the hose into the chamber. Once all the media is removed use the power washer to spray down all the netting on the outer metal cage. Inspect the netting for any damage or holes. If the netting is damaged it can be repaired or re- placed with guidance by the manufacturer. 4.The first step is to contact the manufacturer and order new WetlandMedia. The quantity of media needed can be determined by providing the model number and unit depth. Media will be provided in super sacks for easy installation. Each sack will weigh between 1000 and 2000 lbs. A lifting apparatus (backhoe, boom truck, or other) is rec-ommended to position the super sack over the biofiltration chamber. Fill the media cages up to the same level as the old media. Replant with vegetation. 2.Each vertical under drain on the biofiltration chamber has a removable (threaded) that can be taken off to check any blockages or root growth. Once removed a a jetting attachment can be used to clean out the under drain and orifice riser. 12 MAINTENANCE | DISCHARGE CHAMBER 15. Remove access hatch or manhole cover over discharge chamber. 16. Enter chamber to gain access to the drain down filter. Unlock the locking mechanism and lift up drain down filter housing to remove used BioMediaGREEN filter block as shown below. NOTE: Drain down filter is only found on units installed in California prior to 2023. If no drain down filter is present, skip steps 16 and 17. 17. Insert a new BioMediaGREEN filter block and lock drain down filter housing back in place. 18. Replace access hatch or manhole cover over discharge chamber. INSPECTION •Excessive accumulation of sediment on the BioMediaGREEN media housed within the drain down filter (California only - older models). The following photos show the condition of the BioMediaGREEN contained within the drain down filter. When media is more than 85% clogged, replacement is required. •Overgrown vegetation. •Water level in the discharge chamber during 100% operating capacity (pre-treatment chamber water level at max height) is lower than the watermark by 20%. 8 ©2022 COPYRIGHT | CONTECH ENGINEERED SOLUTIONS INSPECTION •Excessive accumulation of sediment on the BioMediaGREEN media housed within the drain down filter (California only - older models). The following photos show the condition of the BioMediaGREEN contained within the drain down filter. When media is more than 85% clogged, replacement is required. •Overgrown vegetation. •Water level in the discharge chamber during 100% operating capacity (pre-treatment chamber water level at max height) is lower than the watermark by 20%. 8 ©2022 COPYRIGHT | CONTECH ENGINEERED SOLUTIONS 13 NOTES _______________________________________________________________________________________________________ _______________________________________________________________________________________________________ _______________________________________________________________________________________________________ _______________________________________________________________________________________________________ _______________________________________________________________________________________________________ _______________________________________________________________________________________________________ _______________________________________________________________________________________________________ _______________________________________________________________________________________________________ _______________________________________________________________________________________________________ _______________________________________________________________________________________________________ _______________________________________________________________________________________________________ _______________________________________________________________________________________________________ _______________________________________________________________________________________________________ _______________________________________________________________________________________________________ _______________________________________________________________________________________________________ _______________________________________________________________________________________________________ _______________________________________________________________________________________________________ _______________________________________________________________________________________________________ _______________________________________________________________________________________________________ _______________________________________________________________________________________________________ _______________________________________________________________________________________________________ _______________________________________________________________________________________________________ _______________________________________________________________________________________________________ _______________________________________________________________________________________________________ _______________________________________________________________________________________________________ 14 For Office Use Only (city) (Zip Code)(Reviewed By) Owner / Management Company (Date) Contact Phone ( )_ Inspector Name Date / /Time AM / PM Weather Condition Additional Notes Yes Depth: Yes No Modular Wetland System Type (Curb, Grate or UG Vault):Size (22', 14' or etc.): Other Inspection Items: Storm Event in Last 72-hours? No YesType of Inspection Routine Follow Up Complaint Storm Office personnel to complete section to the left. Inspection Report Modular Wetlands Linear Is the filter insert (if applicable) at capacity and/or is there an accumulation of debris/trash on the shelf system? Does the cartridge filter media need replacement in pre-treatment chamber and/or discharge chamber? Any signs of improper functioning in the discharge chamber? Note issues in comments section. Chamber: Is the inlet/outlet pipe or drain down pipe damaged or otherwise not functioning properly? Structural Integrity: Working Condition: Is there evidence of illicit discharge or excessive oil, grease, or other automobile fluids entering and clogging theunit? Is there standing water in inappropriate areas after a dry period? Damage to pre-treatment access cover (manhole cover/grate) or cannot be opened using normal lifting pressure? Damage to discharge chamber access cover (manhole cover/grate) or cannot be opened using normal lifting pressure? Does the MWS unit show signs of structural deterioration (cracks in the wall, damage to frame)? Project Name Project Address Inspection Checklist CommentsNo Does the depth of sediment/trash/debris suggest a blockage of the inflow pipe, bypass or cartridge filter? If yes, specify which one in the comments section. Note depth of accumulation in in pre-treatment chamber. Is there a septic or foul odor coming from inside the system? Is there an accumulation of sediment/trash/debris in the wetland media (if applicable)? Is it evident that the plants are alive and healthy (if applicable)? Please note Plant Information below. Sediment / Silt / Clay Trash / Bags / Bottles Green Waste / Leaves / Foliage Waste:Plant Information No Cleaning Needed Recommended Maintenance Additional Notes: Damage to Plants Plant Replacement Plant Trimming Schedule Maintenance as Planned Needs Immediate Maintenance ENGINEERED SOLUTIONS 15 For Office Use Only (city) (Zip Code)(Reviewed By) Owner / Management Company (Date) Contact Phone ( )_ Inspector Name Date / /Time AM / PM Weather Condition Additional Notes Site Map # Comments: Inlet and Outlet Pipe Condition Drain Down Pipe Condition Discharge Chamber Condition Drain Down Media Condition Plant Condition Media Filter Condition Long: MWS Sedimentation Basin Total Debris Accumulation Condition of Media 25/50/75/100 (will be changed@ 75%) Operational Per Manufactures' Specifications (If not, why?) Lat:MWS Catch Basins GPS Coordinates of Insert Manufacturer / Description / Sizing Trash Accumulation Foliage Accumulation Sediment Accumulation Type of Inspection Routine Follow Up Complaint Storm Storm Event in Last 72-hours? No Yes Office personnel to complete section to the left. Project Address Project Name Cleaning and Maintenance Report Modular Wetlands LinearENGINEERED SOLUTIONS SUPPORT DRAWINGS AND SPECIFICATIONS ARE AVAILABLE AT WWW.CONTECHES.COM © 2023 CONTECH ENGINEERED SOLUTIONS LLC, A QUIKRETE COMPANY 800-338-1122 WWW.CONTECHES.COM ALL RIGHTS RESERVED. PRINTED IN THE USA. CONTECH ENGINEERED SOLUTIONS LLC PROVIDES SITE SOLUTIONS FOR THE CIVIL ENGINEERING INDUSTRY. CONTECH’S PORTFOLIO INCLUDES BRIDGES, DRAINAGE, SANITARY SEWER, STORMWATER AND EARTH STABILIZATION PRODUCTS. FOR INFORMATION ON OTHER CONTECH DIVISION OFFERINGS, VISIT CONTECHES.COM OR CALL 800-338-1122. Modular Wetlands Maintenance Guide 1/2023 NOTHING IN THIS CATALOG SHOULD BE CONSTRUED AS A WARRANTY. APPLICATIONS SUGGESTED HEREIN ARE DESCRIBED ONLY TO HELP READERS MAKE THEIR OWN EVALUATIONS AND DECISIONS, AND ARE NEITHER GUARANTEES NOR WARRANTIES OF SUITABILITY FOR ANY APPLICATION. CONTECH MAKES NO WARRANTY WHATSOEVER, EXPRESS OR IMPLIED, RELATED TO THE APPLICATIONS, MATERIALS, COATINGS, OR PRODUCTS DISCUSSED HEREIN. ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND ALL IMPLIED WARRANTIES OF FITNESS FOR ANY PARTICULAR PURPOSE ARE DISCLAIMED BY CONTECH. SEE CONTECH’S CONDITIONS OF SALE (AVAILABLE AT WWW.CONTECHES.COM/COS) FOR MORE INFORMATION. ENGINEERED SOLUTIONS For more information, please contact customerservice@wearebrightwater.com P.O. Box 85430 │ San Diego, California 92186 │ (619) 821-1558 │www.wearebrightwater.com Manual - I&M - CPS - Version BW1.00.docx Inspection & Maintenance Guide for Connector Pipe Screens __________________________________________________________________________ Inspection and Maintenance Guide __________________________________________________________________________ For more information, please contact customerservice@wearebrightwater.com P.O. Box 85430 │ San Diego, California 92186 │ (619) 821-1558 │www.wearebrightwater.com 2 Manual - I&M - CPS - Version BW1.00.docx Inspection & Maintenance Guide for Connector Pipe Screens OVERVIEW: The BrightWaterTM Connector Pipe Screen (CPS) is a post-construction, stormwater Best Management Practice (BMP) designed to capture 100% of trash and debris 5mm and larger in size from stormwater systems. The device, which consists of a metal screen and mounting framework, installs in front of the outlet pipe (connector pipe) of a curb inlet or drop inlet catch basin and screens for gross pollutants such as trash and debris effectively converting an existing or new catch basin into a treatment device. The Device is typically implemented to comply with Federal, State, and Local Clean Water Act regulations and Full Trash Capture compliance. To ensure proper function of the Device and continued protection of the receiving water bodies, the Device must be regularly inspected and maintained. These requirements to inspect and maintain apply to all stormwater BMPs regardless of type, function or even brand. This guideline contains recommendations and requirements for the inspection and maintenance specific to the BrightWaterTM Connector Pipe Screen. INSPECTION OVERVIEW: A thorough inspection program is necessary to ensure the treatment Device is operating as intended and providing the necessary pollutant removal. An actively practiced inspection program can also minimize unnecessary maintenance and provide insight to the status of the CURB INLET CATCH BASIN CURB INLET OPENING CONNECTOR PIPE SCREEN GUTTER CURB MANHOLE COVER BRIGHTWATERTM CONNECTOR PIPE SCREEN INSTALLED IN A CURB INLET STYLE CATCH Figure 1- BrightwaterTM Connector Pipe Screen Diagram For more information, please contact customerservice@wearebrightwater.com P.O. Box 85430 │ San Diego, California 92186 │ (619) 821-1558 │www.wearebrightwater.com 3 Manual - I&M - CPS - Version BW1.00.docx Inspection & Maintenance Guide for Connector Pipe Screens receiving water bodies. An inspection program should be structured based on the type of treatment Device as well as the location and function of the treatment Device. It is critical to closely monitor and document the first year of operation after initial installation in order to develop a long term maintenance plan for the Device that is consistent with the environmental requirements of the installation. INSPECTION FREQUENCY AND TIMING: The BrightWaterTM Connector Pipe Screen should be inspected on a routine and recurring basis. The frequency and timing of the inspections can be variable based on the configuration of the Device, location of the Device within the drainage system, and the geographic region of installation. During the first year of operation, after initial installation, the Connector Pipe Screen should be inspected more frequently to create a baseline of understanding for operation of the Device. Subsequent years of operation can have reduced inspection provided no anomalous events occur during the year. First Year Inspection – A minimum of three inspections in the first year are recommended. The first inspection should occur on or around the start of the rainy season with the last inspection occurring on or around the end of the rainy season. If the region of installation has no definitive rainy season, inspections should be spaced evenly throughout the year. Maintenance visits may coincide with inspection visits. Second Year and Subsequent Year Inspections – A minimum of two inspections per year are recommended. The first inspection should occur on or around the start of the rainy season and the final inspection should occur on or around the end of the rainy season. If the region of installation has no definitive rainy season, inspections should be spaced evenly throughout the year. If during the first year inspection the Device and/or location is determined have high pollutant loadings or atypical loadings of sediment, trash and debris, additional inspections may be necessary. Maintenance visits may coincide with inspection visits. INSPECTION EQUIPMENT: The following equipment and tools are recommended to facilitate inspection of the BrightWaterTM Connector Pipe Screen: Personal Protective Equipment (PPE) including but not limited to pants, long sleeve shirt, boots, gloves, eye protection, hearing protection, head protection, and high visibility safety vest. Work Zone safety equipment including but not limited to safety cones, street barricades, traffic control signage, and open manhole barricades. For more information, please contact customerservice@wearebrightwater.com P.O. Box 85430 │ San Diego, California 92186 │ (619) 821-1558 │www.wearebrightwater.com 4 Manual - I&M - CPS - Version BW1.00.docx Inspection & Maintenance Guide for Connector Pipe Screens Manhole Hook/Removal Tool or similar. Flashlight. Tape Measure. Digital Camera. A treatment Device Inspection and Maintenance form for documenting the inspection visit. (A BrightWaterTM Inspection and Maintenance form is included with this document.) INSPECTION PROCEDURES: The BrightWaterTM Connector Pipe Screen can be inspected without entry into the catch basin. The Inspection should begin by preparing and installing all safety measures followed by the inspection and documentation. Specific procedures for the inspection are detailed below: Adorn all PPE and prepare documentation equipment. Install all Work Zone safety equipment and conduct a brief safety meeting. Work Zone safety equipment should protect the inspector(s) from vehicular traffic and should also isolate and protect pedestrians and vehicles from the work zone. Remove the manhole cover utilizing the manhole puller/remover and safely set aside out of the way of the inspection operations and pedestrians or vehicles. Inspect the gutter, curb face, and curb opening. – The areas outside of the catch basin should be free from debris, obstructions and standing water. The presence of any of these conditions outside of the catch basin are potential indicators of maintenance that may be necessary for the Connector Pipe Screen. If any of these maintenance indicators are encountered they should be documented and, depending on severity, should be rectified through recommended maintenance. Maintenance may occur simultaneously with inspection provided the maintenance indicators have already been documented. Utilizing a flashlight, inspect the interior of the catch basin – Once outfitted with a Connector Pipe Screen, the interior of the catch basin is converted into a stormwater treatment device and acts as both the treatment and storage vessel for pollutants. For more information, please contact customerservice@wearebrightwater.com P.O. Box 85430 │ San Diego, California 92186 │ (619) 821-1558 │www.wearebrightwater.com 5 Manual - I&M - CPS - Version BW1.00.docx Inspection & Maintenance Guide for Connector Pipe Screens Pollutants such as trash, debris, and sediment are expected to be captured inside of the catch basin. The presence of such pollutants are indicators the Device is operating as intended. Conversely, the lack of such pollutants present in the Device may be an indicator that the Device or stormwater system is not functioning as intended. The quantities of pollutants should be documented and compared with the maximum capacities for the Device and maintenance recommended as necessary. Inspect the area behind the CPS and the Connector pipe. - The area behind the Connector Pipe Screen and the Connector Pipe itself should be free from debris, obstructions, and standing water. The presence of any of these conditions downstream of the treatment Device are potential indicators of maintenance that may be necessary for the Connector Pipe Screen treatment system. If any of these maintenance indicators are encountered, they should be documented and depending on the severity, should be rectified through recommended maintenance. Maintenance may occur simultaneously with inspection provided the maintenance indicators have already been documented. Inspect the Connector Pipe Screen for physical or structural anomalies. – The CPS should be firmly mounted to the catch basin wall and floor and there should be no loose or missing hardware. No gaps in excess of 5mm should be present. Bent, Broken, or otherwise damaged structural components should documented and maintained. Finalize the Documentation and Inspection Form – Photograph the conditions of interior and exterior of the catch basin and Connector Pipe Screen. Document the inspection event utilizing the Treatment Device Inspection Form included with this manual or similar. The presence of standing water or vector such as mosquitos should be highlighted in the inspection form. The local vector control agency should be notified if mosquitos are present in the catch basin or treatment Device. Replace the manhole cover and remove all Work Zone Safety Equipment. Confined Space Entry is typically not required for routine inspections of standard installations. Confined space entry protocol should be followed should circumstances require entry into the catch basin for inspection. MAINTENANCE OVERVIEW: To ensure proper function of the BrightWaterTM Connector Pipe Screen and to ensure continued protection of the receiving water bodies, the Device must be regularly maintained. A maintenance program should be structured based on the type of treatment Device as well as the location and function of the treatment Device. It is also important to incorporate data received from the inspection program into the maintenance recommendations to ensure proper function but also to minimize unnecessary maintenance. It is important to recognize that maintenance operations include a wide variety of operations and not all operations have to occur during each maintenance cycle. Maintenance may consist solely of trash and debris For more information, please contact customerservice@wearebrightwater.com P.O. Box 85430 │ San Diego, California 92186 │ (619) 821-1558 │www.wearebrightwater.com 6 Manual - I&M - CPS - Version BW1.00.docx Inspection & Maintenance Guide for Connector Pipe Screens removal or may consist of repair and replacement of components. A customized maintenance program provides the most benefit to operation while minimizing maintenance costs. MAINTENANCE FREQUENCY AND TIMING: BrightWaterTM Connector Pipe Screens should be maintained on a routine and recurring basis. The frequency and timing of the maintenance can be variable based on the configuration of the Device, location of the Device within the drainage system, and the geographic region of installation. During the first year of operation, after initial installation, the Connector Pipe Screen may need to be maintained more frequently to create a baseline of understanding for operation of the Device. Subsequent years of operation may have reduced maintenance provided no anomalous events occur during the year. First Year Maintenance – A minimum of three maintenance visits in the first year are recommended. The first maintenance visit should occur on or around the start of the rainy season with the last maintenance visit occurring on or around the end of the rainy season. If the region of installation has no definitive rainy season, maintenance visits should be spaced evenly throughout the year. Maintenance visits may coincide with inspection visits. Second Year and Subsequent Year Maintenance – A minimum of two maintenance visits per year are recommended. The first maintenance visit should occur on or around the start of the rainy season and the final maintenance visit should occur on or around the end of the rainy season. If the region of installation has no definitive rainy season, maintenance visits should be spaced evenly throughout the year. If during the first year inspection the Device and/or location is determined have high pollutant loadings or atypical loadings of sediment, trash and debris, additional maintenance visits may be necessary. Maintenance visits may coincide with inspection visits. MAINTENANCE EQUIPMENT: The following equipment and tools are recommended to facilitate maintenance of the BrightWaterTM Connector Pipe Screen: Personal Protective Equipment (PPE) including but not limited to pants, long sleeve shirt, boots, gloves, eye protection, hearing protection, head protection, and high visibility safety vest. Work Zone safety equipment including but not limited to safety cones, street barricades, traffic control signage, and open manhole barricades. Manhole Hook/Removal Tool or similar. Flashlight. For more information, please contact customerservice@wearebrightwater.com P.O. Box 85430 │ San Diego, California 92186 │ (619) 821-1558 │www.wearebrightwater.com 7 Manual - I&M - CPS - Version BW1.00.docx Inspection & Maintenance Guide for Connector Pipe Screens Tape Measure. Digital Camera. Small hand tools such as wrenches, screw drivers, and socket set. Industrial Vacuum (Truck mounted, trailer mounted, or portable) A treatment Device Inspection and Maintenance form for documenting the inspection visit. (A BrightWaterTM Inspection and Maintenance form is included with this document.) MAINTENANCE PROCEDURES: The BrightWaterTM Connector Pipe Screen can be routinely maintained without entry into the catch basin for most applications. Maintenance should begin by preparing and installing all safety measures followed by Inspection and documentation. Specific procedures for Maintenance are detailed below: Adorn all PPE and prepare documentation equipment. Install all Work Zone safety equipment and conduct a brief safety meeting. Work Zone safety equipment should protect the maintenance personnel from vehicular traffic and should also isolate and protect pedestrians and vehicles from the work zone. Remove the manhole cover utilizing the manhole puller/remover and safely set aside out of the way of the inspection operations and pedestrians or vehicles. If during inspection it is determined the accumulated trash, debris, and sediment requires removal, an industrial vacuum should be utilized to remove the material. Using a reduced diameter suction hose, vacuum the trash, debris, and sediment from the interior of the catch basin. Figure 2 and Figure 3 illustrate typical maintenance scenarios. The suction hose is inserted through the manhole opening as illustrated in Figure 2 and Figure 3. The suction hose should be maneuvered around within the interior of the catch basin removing all trash, debris, and sediment. A pressure washing wand may be utilized to assist this process by freeing stubborn and clogged material from the screen of the Device. The suction hose should remain inside the catch basin at the front edge of the screen while the Device is being washed down. For more information, please contact customerservice@wearebrightwater.com P.O. Box 85430 │ San Diego, California 92186 │ (619) 821-1558 │www.wearebrightwater.com 8 Manual - I&M - CPS - Version BW1.00.docx Inspection & Maintenance Guide for Connector Pipe Screens BRIGHTWATERTM CONNECTOR PIPE SCREEN MAINTENANCE - SCENARIO 1 MANHOLE OPENING CURB INLET OPENING CURB INLET CATCH BASIN CONNECTOR PIPE SCREEN INDUSTRIAL VACUUM HOSE OUTLET PIPE Figure 2 - BrightwaterTM Connector Pipe Screen Maintenance Scenario 1 Figure 3 - BrightwaterTM Connector Pipe Screen Maintenance Scenario 2 INDUSTRIAL VACUUM HOSE MANHOLE OPENING CURB INLET CATCH BASIN OUTLET PIPE CONNECTOR PIPE SCREEN BRIGHTWATERTM CONNECTOR PIPE SCREEN MAINTENANCE - SCENARIO 2 DEFLECTOR PLATE ASSEMBLY For more information, please contact customerservice@wearebrightwater.com P.O. Box 85430 │ San Diego, California 92186 │ (619) 821-1558 │www.wearebrightwater.com 9 Manual - I&M - CPS - Version BW1.00.docx Inspection & Maintenance Guide for Connector Pipe Screens Trash and debris may accumulate on the top of the Deflector Plate Assembly. (See Figure 3.) This material should be removed during the maintenance visit by either utilizing the vacuum hose directly on top of the Deflector Plate or by utilizing the pressure washing wand to rinse the material from the Deflector Plate onto the floor of the catch basin where the vacuum hose can suck the material up. Removed trash, debris, and sediment should be disposed of following local, state, and federal guidelines. Typically this material is considered non-hazardous waste and can be disposed of in the standard waste stream. If oil and grease are determined to be present amongst the trash, debris, and sediment, the material should be disposed of following local, state, and federal guidelines. Depending on oil content, this material may be classified as hazardous waste and should be disposed of according to local, state, and federal guidelines. Finalize the Documentation and Maintenance Form – Photograph the conditions of interior and exterior of the catch basin and Connector Pipe Screen. Document the maintenance event utilizing the Treatment Device Inspection Form included with this manual or similar. The presence of standing water or vector such as mosquitos should be highlighted in the maintenance form. The local vector control agency should be notified if mosquitos are present in the catch basin or treatment Device. Replace the manhole cover and remove all Work Zone Safety Equipment. For more information, please contact customerservice@wearebrightwater.com P.O. Box 85430 │ San Diego, California 92186 │ (619) 821-1558 │www.wearebrightwater.com 10 Manual - I&M - CPS - Version BW1.00.docx Inspection & Maintenance Guide for Connector Pipe Screens INSPECTION & MAINTENANCE FORM Site Name: ____________________________________________________________________ Site Address: __________________________________________________________________ _____________________________________________________________________________ (City) (State) (Zip Code) NPDES Tracking No. ____________________________________________________________ Owner/Operator Name: __________________________________________________________ Site Contact: __________________________________________________________________ Phone: ( ) - Email: _____________________________________________ Inspector Name: _______________________________________________________________ Phone: ( ) - Email: _____________________________________________ Date of Visit: ________/________/_____________ Time of Visit: _________________ AM / PM Type of Visit: Scheduled Pre-Storm During Storm Post-Storm Emergency Visit Purpose: Inspection Maintenance Both BMP ID BMP Location (Site Map or GPS Coordinates) Trash Load (yd3) Debris Load (yd3) Sediment Load (yd3) Screen Condition Structure Condition General Condition of BMP Corrective Action Required or Performed (Continued on next page.) For more information, please contact customerservice@wearebrightwater.com P.O. Box 85430 │ San Diego, California 92186 │ (619) 821-1558 │www.wearebrightwater.com 11 Manual - I&M - CPS - Version BW1.00.docx Inspection & Maintenance Guide for Connector Pipe Screens INSPECTION & MAINTENANCE FORM (Continued) BMP ID BMP Location (Site Map or GPS Coordinates) Trash Load (yd3) Debris Load (yd3) Sediment Load (yd3) Screen Condition Structure Condition General Condition of BMP Corrective Action Required or Performed CERTIFICATION STATEMENT “I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gathered and evaluated the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations.” Print name and title: ___________________________________________________________________________ Signature:_________________________________________________________ Date:_____________________ ATTACHMENT 4 City standard Single Sheet BMP (SSBMP) Exhibit [Use the City’s standard Single Sheet BMP Plan.] CAP PA PA PA PA PA PA PA PA PA PA PA PA PA PA PA PA PA PAPA PA PA PA PA PA PA PA PA PA PAPA PA PA PA PA PA PA PAPA PA PA PA PA PA PA PA PA PA PA PA PA PA PA PAPA PA PA BMP PA PA PA PA PA PA PA PA PA PA PA PA PA PA PA PA PA PA PA PAPAPAPAPAPA PA PA PA PA PA PA BMP PA PA BMP PA PA PA PA PA PA PA BMP BMP PA PAPA PA PA PA PA PA 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. BMP NOTES: PARTY RESPONSIBLE FOR MAINTENANCE: NAME ADDRESS PHONE NO. CONTACT PLAN PREPARED BY: NAME ADDRESS PHONE NO. CERTIFICATION COMPANY SCALE : 1" = 5. REFER TO MAINTENANCE AGREEMENT DOCUMENT. 6. SEE PROJECT SWQMP FOR ADDITIONAL INFORMATION. SIGNATURE BMP CONSTRUCTION AND INSPECTION NOTES: THE EOW WILL VERIFY THAT PERMANENT BMPS ARE CONSTRUCTED ANDOPERATING IN COMPLIANCE WITH THE APPLICABLE REQUIREMENTS.PRIOR TO OCCUPANCY THE EOW MUST PROVIDE: 1.PHOTOGRAPHS OF THE INSTALLATION OF PERMANENT BMPSPRIOR TO CONSTRUCTION, DURING CONSTRUCTION, AND AT FINALINSTALLATION.2.A WET STAMPED LETTER VERIFYING THAT PERMANENT BMPS ARECONSTRUCTED AND OPERATING PER THE REQUIREMENTS OF THEAPPROVED PLANS.3.PHOTOGRAPHS TO VERIFY THAT PERMANENT WATER QUALITYTREATMENT SIGNAGE HAS BEEN INSTALLED. PRIOR TO RELEASE OF SECURITIES, THE DEVELOPER IS RESPONSIBLEFOR ENSURING THE PERMANENT BMPS HAVE NOT BEEN REMOVED ORMODIFIED BY THE NEW HOMEOWNER OR HOA WITHOUT THE APPROVALOF THE CITY ENGINEER. 30' N/A. TREATMENT CONTROL ONLY. PROJECT IS EXEMPT FROM HYDROMODIFICATION. MODULARWETLAND UNIT WALLEDBIOFILTRATIONPLANTER MODULARWETLAND UNIT CONNECTORPIPE SCREEN TBD MANYPER PLAN CHELISA PACK, PE PDC, A BOWMAN COMPANY 701 B STREET SUITE 800 SAN DIEGO, CA, 92101 619.235.6471 GRT CARLSBAD VILLAGE, LLC 2001 WILSHIRE BLVD, SUITE 420 SANTA MONICA, CA 90403 818.731.3646 ROOF DRAIN TOLANDSCAPING BMP TYPEBMP ID #SYMBOL CASQA NO.DRAWING NO.SHEET NO.(S)MAINTENANCEFREQUENCY BMP TABLE1B 2 3D 4A 8 SD-11 INSPECTION FREQUENCYQUANTITY TREATMENT CONTROL LOW IMPACT DESIGN (L.I.D.) SOURCE CONTROL HYDROMODIFICATION & TREATMENT CONTROL OTHER EA.SDP 4, 5 ANNUALLY ANNUALLY 12 TRASH ENCLOSURE SD-32 TWICE PER YEAR TWICE PER YEAR LANDSCAPING(PERVIOUS)SD-10 20, 743 SF SDP 4, 5 ANNUALLY MONTHLY MONTHLY TC-32 SF SDP 4, 5 STENCILS13 SD-13DRAINS TO OCEANNO DUMPING ** *CHOOSE FROM THE LIST BELOW FOR COMPLETING THE FIELDSIN THE INSPECTIONS & MAINTENANCE FREQUENCY COLUMNS: ANNUALSEMI-ANNUALLYQUARTERLYBIMONTHLYMONTHLYAS NEEDEDNONEWEEKLY1 TIME PER YEAR2 TIMES PER YEAR3 TIMES PER YEAR4 TIMES PER YEAR TWICE PER YEAR REV. 9/2022 TRASH CAPTURE BMPs TC-60 3 SDP 5 QUARTERLY QUARTERLY 1B 2 1188 SDP 4, 5 4 3A MONTHLYSDP4, 5 TWICE PER YEAR4 12 SEE PLAN SEE PLAN SEE PLAN 3A 3B 3B 3C 4B TOTAL 11 SEE PLAN 12 1A 7 3D 7 3C 4A 4B 4C 1A 4C PEAK FLOWATTENUATIONDETENTIONVAULT TWICE PER YEAR TWICE PER YEAR-SDP 4, 52 1B 2 3D 7 8 9 11 13 9