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20200309_WQMP_03-09-2020
Preliminary Water Quality Management Plan (WQMP) Project Name: Newport Beach Fire Station No. 2 2807 Newport Beach Boulevard, Newport Beach, CA 92663 Prepared for: City of Newport Beach – Public Works Department 100 Civic Center Drive Newport Beach, CA 92660 949-644-3330 Prepared by: MSL Engineering, Inc. Engineer _Aaron D. Pellow______ Registration No._77193___ 402 W. Arrow Highway, Suite 4 San Dimas, CA 91773 909-305-2395 Original Date: 03-09-2020 PA2019-098 Water Quality Management Plan (WQMP) Newport Beach Fire Station No.2 City of Newport Beach Owner’s Certification Project Owner’s Certification Permit/Application No. TBD Grading Permit No. TBD Tract/Parcel Map No. N/A Building Permit No. TBD CUP, SUP, and/or APN (Specify Lot Numbers if Portions of Tract) APN: 047-110-36 This Water Quality Management Plan (WQMP) has been prepared for the City of Newport Beach by MSL Engineering, Inc. The WQMP is intended to comply with the requirements of the local NPDES Stormwater Program requiring the preparation of the plan. The undersigned, while it owns the subject property, is responsible for the implementation of the provisions of this plan and will ensure that this plan is amended as appropriate to reflect up-to-date conditions on the site consistent with the current Orange County Drainage Area Management Plan (DAMP) and the intent of the non-point source NPDES Permit for Waste Discharge Requirements for the County of Orange, Orange County Flood Control District and the incorporated Cities of Orange County within the Santa Ana Region. Once the undersigned transfers its interest in the property, its successors-in-interest shall bear the aforementioned responsibility to implement and amend the WQMP. An appropriate number of approved and signed copies of this document shall be available on the subject site in perpetuity. Owner: Title Company City of Newport Beach Address 100 Civic Center Drive, Newport Beach, CA 92660 Email Telephone # Signature Date I I PA2019-098 Water Quality Management Plan (WQMP) Newport Beach Fire Station No.2 CITY OF NEWPORT BEACH Owner’s Certification Contents Page No. Section I Discretionary Permit(s) and Water Quality Conditions ....................... 1 Section II Project Description ............................................................................... 2 II.1 Project Description ................................................................................... 2 II.2 Potential Stormwater Pollutants ............................................................. 3 II.3 Hydrologic Conditions of Concern ......................................................... 4 II.4 Post Development Drainage Characteristics ......................................... 4 II.5 Property Ownership/Management ......................................................... 4 Section III Site Description .................................................................................... 5 III.1 Physical Setting ....................................................................................... 5 III.2 Site Characteristics ................................................................................. 5 III.3 Watershed Description .......................................................................... 7 Section IV Best Management Practices (BMPs) ................................................... 8 IV. 1 Project Performance Criteria ................................................................. 8 IV.2. Site Design and Drainage Plan ............................................................ 9 IV.3 LID BMP Selection and Project Conformance Analysis ...................... 10 IV.3.1 Hydrologic Source Controls ....................................................................... 10 IV.3.2 Infiltration BMPs ......................................................................................... 11 IV.3.3 Evapotranspiration, Rainwater Harvesting BMPs .................................... 12 IV.3.4 Biotreatment BMPs ..................................................................................... 13 IV.3.5 Hydromodification Control BMPs ............................................................. 14 IV.3.6 Regional/Sub-Regional LID BMPs ............................................................ 14 IV.3.7 Treatment Control BMPs ........................................................................... 14 IV.3.8 Non-structural Source Control BMPs ........................................................ 15 IV.3.9 Structural Source Control BMPs ................................................................ 17 IV.4 Alternative Compliance Plan ................................................................ 19 IV.4.1 Water Quality Credits ................................................................................ 19 IV.4.2 Alternative Compliance Plan Information ........................................ 19 Section V Inspection/Maintenance Responsibility for BMPs ............................. 20 Section VI WQMP Site Plan and Reference Plans ............................................... 21 VI.1 WQMP Site Plan and Reference Plans .................................................. 21 WQMP Site Plan Sheet C20 ..................................................................................... 22 Hydromodification Susceptibility Map ................................................................... 23 Section VII Educational Materials ...................................................................... 24 Attachments Attachment A ................................................................................................ BIO-7 Sizing Attachment B .............................................................. Operations and Maintenance Plan Attachment C .............. Geotechnical Investigation Report and Infiltration Rate Testing PA2019-098 Water Quality Management Plan (WQMP) Newport Beach Fire Station No. 2 City of Newport Beach Section I Newport Beach FS 2 - WQMP 03-09-20 Page 1 Section I Discretionary Permit(s) and Water Quality Conditions Project Infomation Permit/Application No. TBD Tract/Parcel Map No. N/A Additional Information/ Comments: 2807 Newport Beach Boulevard, Newport Beach, CA 92663 Water Quality Conditions Water Quality Conditions (list verbatim) There are no Water Quality Conditions specifically identified by the City of Newport Beach for this project. Preparation of Conceptual or Preliminary WQMPs and Project WQMPs is required by the municipal National Pollutant Discharge Elimination System (NPDES) permit held jointly by the Permittees. As authorized by the Federal Clean Water Act (CWA), the NPDES permit program controls water pollution by regulating sources that discharge pollutants into waters of the United States. The Fire Station project is subject to the requirements of the Regional Water Quality Control Boards (RWQCBs) for “North Orange County” (NOC) permit area under the jurisdiction of the Santa Ana Regional Water Quality Control Board (SARWQCB). Local jurisdictions within the NOC Permit Area will review and approve Conceptual or Preliminary WQMPs and final Project WQMPs as part of the development plan and entitlement approval process and the discretionary permit approval process for new development projects as defined in DAMP Section 7.6 and Table 7.II-2. Watershed-Based Plan Conditions Provide applicable conditions from watershed - based plans including WIHMPs and TMDLS. The Watershed Infiltration and Hydromodification Management Plan (WIHMP) for the Newport Bay watershed has not yet been approved. Approved TMDLS: Sediment, Nutrients, and Fecal Coliform, per Resolution 98-9, as amended by Resolution 98-100. PA2019-098 Water Quality Management Plan (WQMP) Newport Beach Fire Station No. 2 City of Newport Beach Section III Newport Beach FS 2 - WQMP 03-09-20 Page 2 Section II Project Description II.1 Project Description Description of Proposed Project Development Category (Verbatim from WQMP): Significant redevelopment projects, where significant redevelopment is defined as the addition or replacement of 5,000 or more square feet of impervious surface on an already developed site. Redevelopment does not include routine maintenance activities that are conducted to maintain original line and grade, hydraulic capacity, original purpose of the facility, or emergency redevelopment activity required to protect public health and safety. Project Area (ft2): 17,693 Number of Dwelling Units: None SIC Code: 9224 and 8231 Narrative Project Description: The project consists of the redevelopment of the existing 0.4 acre site that previously contained a McDonald’s restaurant that has since been demolished in preparation of the fire station development. All remaining site improvements will be demolished and removed from the site as a part of the redevelopment. New construction will include a fire station, three new driveways, onsite concrete paved parking on the north portion of the site, a trash enclosure, emergency generator, and new landscaped areas. Project Area Pervious Impervious Area (acres or sq ft) Percentage Area (acres or sq ft) Percentage Pre-Project Conditions 2,850 SF 16.1% 14,843 SF 83.9% Post-Project Conditions 1,800 SF 10.2% 15,893 SF 89.8% Drainage Patterns/Connections The site is part of the Newport Bay watershed, with existing flows primarily discharging to the east side of the site and flowing to northbound Newport Each Boulevard. Curb and gutter flow on Newport Beach Boulevard flows to the north and is eventually captured within a public catch basin near 30th Street. --------------------------------------------------------------------------------------------------------------------------------------------------------------------------~ -- ------ ------------ ------ -- ----------------------------------------------------------------------------------------------- -- ---------------------- ------------------------------, ---- PA2019-098 Water Quality Management Plan (WQMP) Newport Beach Fire Station No. 2 City of Newport Beach Section III Newport Beach FS 2 - WQMP 03-09-20 Page 3 II.2 Potential Stormwater Pollutants Pollutants of Concern Pollutant Check One: E=Expected to be of concern N=Not Expected to be of concern Additional information and comments Suspended-Solid/ Sediment E N Nutrients E N Heavy Metals E N Pathogens (Bacteria/Virus) E N Pesticides E N Oil and Grease E N Toxic Organic Compounds E N Trash and Debris E N [8J ' i [8J ! i [8J I □ □ ! . ' □ I ! □ □ □ □ □ PA2019-098 Water Quality Management Plan (WQMP) Newport Beach Fire Station No. 2 City of Newport Beach Section III Newport Beach FS 2 - WQMP 03-09-20 Page 4 II.3 Hydrologic Conditions of Concern No – See map in Section 7. Yes – Describe applicable hydrologic conditions of concern below. Refer to Section 2.2.3 in the TGD. II.4 Post Development Drainage Characteristics Runoff in the post development conditions will be primarily captured onsite and treated, excepting a small portion of site landscaping along the frontage of the property. Runoff from the parking area is collected within a new drain box inlet in the northeast corner of the site and is conveyed directly to a proposed Modular Wetlands stormwater treatment system. Roof drainage from the new building is conveyed directly to the new underground storm drain system. All runoff from the site is eventually discharged via surface flow to Newport Beach Boulevard at the northeast corner of the site (after onsite treatment). II.5 Property Ownership/Management The property is owned and operated by the City of Newport Beach. All ongoing maintenance and operation of the facility and any stormwater Best Management Practices will be the responsibility of the City. □ PA2019-098 Water Quality Management Plan (WQMP) Newport Beach Fire Station No. 2 City of Newport Beach Section III Newport Beach FS 2 - WQMP 03-09-20 Page 5 Section III Site Description III.1 Physical Setting Planning Area/ Community Name Corona Del Mar Location/Address 2807 Newport Beach Boulevard Land Use Public Facilities Zoning Public Facilities Acreage 0.40 Predominant Soil Type Silty fine sand over medium dense sand with free ground water encountered at 7’ below existing grade. III.2 Site Characteristics Precipitation Zone 0.65” Topography Slopes from southwest to northeast. Generally flat. Drainage Patterns/Connections Newport Bay Watershed via surface flow to City storm drain system. Soil Type, Geology, and Infiltration Properties Per the Geotechnical Investigation for this project: 4.2 Geotechnical Conditions Pavements: Asphaltic concrete pavements were encountered at the ground surface at Boring Nos. B-1 and B-3. At these boring locations, the pavements consist of 3± inches of asphaltic concrete with 0 to 8± inches of underlying aggregate base. Portland cement concrete pavements were encountered at the ground surface at Boring No. B-2. The pavement section at this boring consists of 4± inches of Portland cement concrete with no discernible layer of underlying aggregate base. Artificial Fill: Artificial fill soils were encountered beneath the pavements at Boring Nos. B-1 and B-2 extending to depths of 3 to 4½± feet below the existing site grades. The PA2019-098 Water Quality Management Plan (WQMP) Newport Beach Fire Station No. 2 City of Newport Beach Section III Newport Beach FS 2 - WQMP 03-09-20 Page 6 fill soils generally consist of medium dense silty fine sands. These soils possess a disturbed appearance and occasional artificial debris including nails and metallic fragments resulting in their classification as artificial fill. Alluvium: Native alluvium was encountered beneath the artificial fill at Boring Nos. B-1 and B-2, and beneath the pavements at Boring No. B-3. The alluvium generally consists of medium dense fine sands and fine to medium sands with occasional silty sand layers. Occasional loose fine sand and fine to medium sand strata were present in the upper 8± feet. Boring Nos. B-1 and B- 2 were both terminated in a dense fine to medium sand stratum encountered at depths of 42 to 47± feet, extending to the maximum depth explored of 50± feet. Hydrogeologic (Groundwater) Conditions Groundwater: Free water was encountered at a depth of 7± feet at Boring Nos. B- 1 and B-2, and at a depth of 5½± feet at Boring No. B-3. Based on the water level measurements and the moisture contents of the recovered soil samples, the static groundwater table is considered to have existed at a depth between 5½ and 7± feet below the existing site grades at the time of the subsurface investigation. Geotechnical Conditions (relevant to infiltration) Shallow groundwater will prohibit the feasibility of infiltration at the site, as County required separation between infiltration devices and groundwater will not be possible. Off-Site Drainage Runoff is discharged via surface flow to Newport Beach Boulevard at the northeast corner of the site and flows via curb and gutter to the public storm drain system where it is conveyed to Newport Bay. Utility and Infrastructure Information There are existing dry and wet utilities at the site since it was previously an operating McDonald’s restaurant. New connections will be made at the property line or in the adjacent alley as needed. PA2019-098 Water Quality Management Plan (WQMP) Newport Beach Fire Station No. 2 City of Newport Beach Section III Newport Beach FS 2 - WQMP 03-09-20 Page 7 III.3 Watershed Description Receiving Waters Newport Bay 303(d) Listed Impairments Chlordane, Copper, DDT (Dichlorodiphenyltrichloroethane), Nutrients PCBs (Polychlorinated biphenyls), Pesticides, Sediment Toxicity Applicable TMDLs Sediment, Nutrients, and Fecal Coliform, per Resolution 98-9, as amended by Resolution 98-100. Pollutants of Concern for the Project Nutrients, Sediment, Heavy Metals, Pathogens, and Pesticides. Environmentally Sensitive and Special Biological Significant Areas ASBS 32 at Lower Newport Bay PA2019-098 Water Quality Management Plan (WQMP) Newport Beach Fire Station No. 2 CITY OF NEWPORT BEACH Section IV Newport Beach FS 2 - WQMP 03-09-20 Page 8 Section IV Best Management Practices (BMPs) IV. 1 Project Performance Criteria (NOC Permit Area only) Is there an approved WIHMP or equivalent for the project area that includes more stringent LID feasibility criteria or if there are opportunities identified for implementing LID on regional or sub-regional basis? YES NO If yes, describe WIHMP feasibility criteria or regional/sub-regional LID opportunities. Project Performance Criteria (continued) If HCOC exists, list applicable hydromodification control performance criteria (Section 7.II-2.4.2.2 in MWQMP) N/A List applicable LID performance criteria (Section 7.II-2.4.3 from MWQMP) Per the Model WQMP, “The primary goal of using LID BMPs is to preserve a site’s predevelopment hydrology in order to preserve the integrity of receiving water bodies. The adverse effects of changes to runoff patterns and pollutant loading on receiving water bodies caused by land use modifications can be reduced through the use of structural and non-structural techniques that store, infiltrate, evaporate, and detain runoff.” List applicable treatment control BMP performance criteria (Section 7.II-3.2.2 from MWQMP) None. Project runoff will be treated using LID BMPs as described above. Calculate LID design storm capture volume for Project. N/A – See BMP Selection below. □ ~ PA2019-098 Water Quality Management Plan (WQMP) Newport Beach Fire Station No. 2 CITY OF NEWPORT BEACH Section VII Newport Beach FS 2 - WQMP 03-09-20 Page 9 IV.2. Site Design and Drainage Plan There are two major constraints impacting the selection and design of onsite stormwater treatment facilities for this project: 1.) Infiltration is not feasible, as described in Section III.2 above; and 2.) The site layout is fixed by the fire station use on a very small site (0.4 acres), which results in very minimal landscaped areas that could be used for surface treatment such as Bioretention. Per Section 7.II-2.4.4 of the Model WQMP, on-site LID practices that should be considered include, but are not limited to, the following: • Maximize Natural Infiltration Capacity and Groundwater Recharge (where appropriate) o Not appropriate for this site due to the high groundwater table. • Preserve Existing Drainage Patterns and Time of Concentration o Done. • Protect Existing Vegetation and Sensitive Areas o Not applicable. There is only minimal existing landscaped areas, which must be redeveloped to incorporate the new site layout. There are no sensitive areas. • Minimize Impervious Area o Impervious areas were minimized where possible. • Disconnect Impervious Areas o The impervious areas are simply connected to the storm drain system, since there is no substantial benefit to directing impervious areas to pervious areas because of the high groundwater table. • Minimize Construction Footprint o With the re-development of a 0.4 acres site for a fire station use, there is no opportunity to minimize the construction footprint. • Re-vegetate Disturbed Areas o Done, where possible. For preliminary purposes, the entire site area will be considered a single Drainage Management Area (DMA). The proposed site is shown on the Preliminary WQMP Site Plan Sheet C20 in Section VI. Drainage Management Areas Drainage Area No. (DMA) Area (SF) Proposed BMP A 23,920 BIO-7 Proprietary Bioretention. Additional drainage details will be shown on the Grading and Drainage Plan Sheet C5 and the Storm Drain and Utility Plan Sheet C6 during the project’s construction document phase. PA2019-098 Water Quality Management Plan (WQMP) Newport Beach Fire Station No. 2 CITY OF NEWPORT BEACH Section VII Newport Beach FS 2 - WQMP 03-09-20 Page 10 IV.3 LID BMP Selection and Project Conformance Analysis IV.3.1 Hydrologic Source Controls Name Included? Localized on-lot infiltration Impervious area dispersion (e.g. roof top disconnection) Street trees (canopy interception) Residential rain barrels (not actively managed) Green roofs/Brown roofs Blue roofs Impervious area reduction (e.g. permeable pavers, site design) Other: Other: Hydrologic Source Controls have not been implemented for this project. Due to the very limited potential for stormwater infiltration, there would be no benefit to any of the infiltration based HSC’s like Localized on- lot infiltration, impervious area dispersion, or impervious area reduction. These controls would not provide the intended benefit of reduced runoff from the site, and would result in an ongoing maintenance issue for the City if improperly implemented. LJ □ □ □ □ □ □ □ □ PA2019-098 Water Quality Management Plan (WQMP) Newport Beach Fire Station No. 2 CITY OF NEWPORT BEACH Section VII Newport Beach FS 2 - WQMP 03-09-20 Page 11 IV.3.2 Infiltration BMPs Name Included? Bioretention without underdrains Rain gardens Porous landscaping Infiltration planters Retention swales Infiltration trenches Infiltration basins Drywells Subsurface infiltration galleries French drains Permeable asphalt Permeable concrete Permeable concrete pavers Other: Other: There are no proposed Infiltration BMPs due to the geological constraints described in Section III.2 above. Infiltration is not feasible for this project. □ □ □ □ □ □ □ □ □ □ □ □ □ □ □ PA2019-098 Water Quality Management Plan (WQMP) Newport Beach Fire Station No. 2 CITY OF NEWPORT BEACH Section VII Newport Beach FS 2 - WQMP 03-09-20 Page 12 IV.3.3 Evapotranspiration, Rainwater Harvesting BMPs Name Included? All HSCs; See Section IV.3.1 Surface-based infiltration BMPs Biotreatment BMPs Above-ground cisterns and basins Underground detention Other: Evapotranspiration/Rainwater Harvesting It has been determined that Evapotranspiration/Rainwater Harvesting is not a feasible solution for this project. There is simply not an established actual water demand that is reliably present to drain stormwater cisterns during the wet season and especially within short-term (week to a couple of weeks) series of storms that are typical. Based on this result, and the fact that infiltration is not feasible for this site, Bioretention BMPs will be provided for stormwater treatment. I I □ □ ~ □ □ □ PA2019-098 Water Quality Management Plan (WQMP) Newport Beach Fire Station No. 2 CITY OF NEWPORT BEACH Section VII Newport Beach FS 2 - WQMP 03-09-20 Page 13 IV.3.4 Biotreatment BMPs Name Included? Bioretention with underdrains Stormwater planter boxes with underdrains Rain gardens with underdrains Constructed wetlands Vegetated swales Vegetated filter strips Proprietary vegetated biotreatment systems Wet extended detention basin Dry extended detention basins Bioretention for 100% of Area A will be provided for stormwater treatment. Due to constraint #2 described in Section IV.2, there is not sufficient space onsite to provide a surface Bioretention system that would meet the sizing requirements shown in the Technical Guidance. In order to incorporate Bioretention at the site, we have chosen proprietary Bioretention. Specifically, we have chosen the Modular Wetlands unit to provide this proprietary Bioretention, which will allow us to connect to the system via the new onsite underground storm drain system, rather than through surface flow only, as some other proprietary systems allow. Sizing and additional information for the Modular Wetlands is shown in Appendix A. Since there is no offsite storm drain, in close proximity to the site outlet, treated runoff from the site will be discharged from a manhole with a sump pump. Runoff from the site in excess of the water quality event will back up upstream of the Modular Wetlands unit and “bubble-up” through the new drain box near the property line on Newport Beach Boulevard to flow through a new parkway drain to the street. The Modular Wetlands has been sized as a Flow-Based BMP, using the Simple Method Runoff Coefficient for Flow-based BMP Sizing from the Technical Guidance: Q = C × i × A Where: Q = design flowrate, cfs; C = runoff coefficient = (0.75 × imp + 0.15) = (0.75 × 0.898 + 0.15) = 0.83; imp = impervious fraction of drainage area (ranges from 0 to 1); i = design intensity (inches) = 0.27 inches/hour (Appendix A); A = tributary area (acres) = 0.4 acres Q = 0.83x0.27x0.40 = 0.09 cfs Treatment Flow for Modular Wetlands MWS-L-4-8-V = 0.115 cfs (Appendix A) □ □ □ □ □ □ ~ □ □ PA2019-098 Water Quality Management Plan (WQMP) Newport Beach Fire Station No. 2 CITY OF NEWPORT BEACH Section VII Newport Beach FS 2 - WQMP 03-09-20 Page 14 Per the cut sheet provided in Appendix A, a MWS-L-4-8 model will be used for this project to meet the Model WQMP sizing requirements. IV.3.5 Hydromodification Control BMPs Not applicable. Hydromodification Control BMPs BMP Name BMP Description IV.3.6 Regional/Sub-Regional LID BMPs Regional/Sub-Regional LID BMPs Not Applicable. IV.3.7 Treatment Control BMPs Not applicable. Treatment Control BMPs BMP Name BMP Description PA2019-098 Water Quality Management Plan (WQMP) Newport Beach Fire Station No. 2 CITY OF NEWPORT BEACH Section VII Newport Beach FS 2 - WQMP 03-09-20 Page 15 IV.3.8 Non-structural Source Control BMPs Non-Structural Source Control BMPs Identifier Name Check One If not applicable, state brief reason Included Not Applicable N1 Education for Property Owners, Tenants and Occupants N2 Activity Restrictions N3 Common Area Landscape Management N4 BMP Maintenance N5 Title 22 CCR Compliance (How development will comply) No hazardous wastes anticipated. N6 Local Industrial Permit Compliance Not an industrial facility. N7 Spill Contingency Plan No hazardous wastes anticipated. N8 Underground Storage Tank Compliance No underground storage tank. N9 Hazardous Materials Disclosure Compliance No hazardous wastes anticipated. N10 Uniform Fire Code Implementation No hazardous wastes anticipated. N11 Common Area Litter Control N12 Employee Training N13 Housekeeping of Loading Docks No loading docks. N14 Common Area Catch Basin Inspection N15 Street Sweeping Private Streets and Parking Lots N16 Retail Gasoline Outlets Not a retail gasoline outlet N1. Education for Property Owners, Tenants and Occupants: Section VII of this document contains BMP fact sheets and education material relevant to the City of Newport Beach project, for use by City employees that will use the facility. The list of the materials provided is shown in the Table of Contents. It will be the City’s responsibility to provide employees with this educational material. This educational material will provide employees with the information necessary to maintain effective water pollution prevention techniques. This material should be given to new City employees within one month of hire, as well as annually during the annual employee training to existing employees. □ ·······~··············o········ □ ·······~··············o········ □ ·······o··············~········ □ □ □ □ ·······~··············o········ ·······~··············o········ ·······o··············~········ ·······~················o········ □ ·······o······· ·········[gj········ PA2019-098 Water Quality Management Plan (WQMP) Newport Beach Fire Station No. 2 CITY OF NEWPORT BEACH Section VII Newport Beach FS 2 - WQMP 03-09-20 Page 16 N2. Activity Restriction: The City of Newport Beach will be required to maintain a list of restricted activities, regarding stormwater and urban runoff. In addition to the requirements provided here, it is required that the City of Newport Beach review and add additional requirements as necessary. The following requirements shall be enforced at all times at the site: • Dumpster lids must always remain closed and trash shall not be placed next to the dumpster at any time. • Discharges of fertilizer or pesticides to the stormwater drainage system, are prohibited. • Landscaping maintenance waste must be disposed of properly and no waste shall enter the stormwater drainage system. N3. Common Area Landscape Management (SC-41): The City of Newport Beach will be required to properly maintain the landscaping at the facility. The sprinkler system shall be consistently monitored to prevent the chance of overspray or non-stormwater discharge from the site. All federal, state and local laws and regulations will be followed governing the use, storage, and disposal of fertilizers and pesticides. Irrigation schedules shall be offset from pesticide application to prevent non-stormwater discharge. N4. BMP Maintenance: BMP maintenance, implementation schedules, and responsible parties are included with each specific BMP narrative. N11. Common Area Litter Control (SC-34): The City of Newport Beach is required to maintain a litter-free common area and is required to provide a sufficient number of litter receptacles for the facility. The City of Newport Beach will implement a schedule for the proper removal of the litter receptacles for the purposes of keeping the site free of loose litter or overfilled receptacles. N12. Employee Training: The City of Newport Beach will be required to develop employee-training procedures that correspond to the Best Management Practices provided in this report. Training should focus on the project-specific concepts related to the prevention of stormwater pollution at the site. Any employee that will be working at the site shall perform new-hire training, as well as annual refresher training. N14. Common Area Catch Basin Inspection: The City is required to maintain and inspect the onsite drain boxes. The minimum requirements for inspection will be before and after the rainy season (Nov.-Mar.) each year. The drain boxes are required to remain clear and shall be cleaned whenever an inspection reports that a catch basin is more than 25% clogged. N15. Street Sweeping Private Streets and Parking Lots: The City of Newport Beach shall provide sweeping and cleaning for its parking areas as needed. Hosing down the parking lot and patios is prohibited. No runoff is allowed to drain into the drain box inlets. Use proper procedure with pollution prevention measures to avoid discharges of was water and other materials into the storm drain system. PA2019-098 Water Quality Management Plan (WQMP) Newport Beach Fire Station No. 2 CITY OF NEWPORT BEACH Section VII Newport Beach FS 2 - WQMP 03-09-20 Page 17 IV.3.9 Structural Source Control BMPs Fill out structural source control check box forms or provide a brief narrative explaining if Structural source controls were not used. Structural Source Control BMPs Identifier Name Check One If not applicable, state brief reason Included Not Applicable S1 Provide storm drain system stenciling and signage S2 Design and construct outdoor material storage areas to reduce pollution introduction S3 Design and construct trash and waste storage areas to reduce pollution introduction S4 Use efficient irrigation systems & landscape design, water conservation, smart controllers, and source control S5 Protect slopes and channels and provide energy dissipation No adjacent slopes or channels. S6 Dock areas No dock areas S7 Maintenance bays No maintenance bays S8 Vehicle wash areas No outdoor vehicle wash areas, all washing activities shall be conducted within the apparatus bay. S9 Outdoor processing areas No outdoor processing areas S10 Equipment wash areas No outdoor equipment wash areas, all washing activities shall be conducted within the apparatus bay. S11 Fueling areas No fuel tanks onsite. S12 Hillside landscaping No hillside landscaping S13 Wash water control for food preparation areas No outdoor food preparation areas S14 Community car wash racks Community car washes not allowed S1. Provide storm drain system stenciling and signage (BMP No. SD-13): Storm drain signage has been incorporated to the project design for each onsite drain box. Next to the drain box there shall be a painted I C=r=J ~ □ ~ □ ~ □ ~ □ □ ~ □ ~ □ ~ □ ~ □ ~ □ ~ □ ~ □ ~ □ ~ □ ~ PA2019-098 Water Quality Management Plan (WQMP) Newport Beach Fire Station No. 2 CITY OF NEWPORT BEACH Section VII Newport Beach FS 2 - WQMP 03-09-20 Page 18 note “No dumping drains to ocean” stenciled on top of the onsite pavement or on top of the curb next to the drain box. The City of Newport Beach will be required to inspect that the stenciling remains legible a minimum of once per year. S3. Design and construct trash and waste storage areas to reduce pollution introduction (BMP No. SD-32): The designed trash storage facility is designed to contain any pollutant that could occur within the area. The parking lot paving directly adjacent to the trash storage area is sloped away from the trash enclosure in order to prevent run-on to the area. All trash bin lids shall remain closed at all times when not in use. The City of Newport Beach shall inspect the trash storage areas for the integrity of the designed trash enclosure a minimum of once per year. S4. Use efficient irrigation systems & landscape design (BMP No. SD-10): The landscape design for the project has been designed to minimize impervious land coverage. The City of Newport Beach shall consistently monitor the sprinkler system to prevent the possibility of non-stormwater discharge due to over-spray. PA2019-098 Water Quality Management Plan (WQMP) Newport Beach Fire Station No. 2 CITY OF NEWPORT BEACH Section VII Newport Beach FS 2 - WQMP 03-09-20 Page 19 IV.4 Alternative Compliance Plan IV.4.1 Water Quality Credits There are no Water Quality Credits for this project. Description of Proposed Project Project Types that Qualify for Water Quality Credits (Select all that apply): Redevelopment projects that reduce the overall impervious footprint of the project site. Brownfield redevelopment, meaning redevelopment, expansion, or reuse of real property which may be complicated by the presence or potential presence of hazardous substances, pollutants or contaminants, and which have the potential to contribute to adverse ground or surface WQ if not redeveloped. Higher density development projects which include two distinct categories (credits can only be taken for one category): those with more than seven units per acre of development (lower credit allowance); vertical density developments, for example, those with a Floor to Area Ratio (FAR) of 2 or those having more than 18 units per acre (greater credit allowance). Mixed use development, such as a combination of residential, commercial, industrial, office, institutional, or other land uses which incorporate design principles that can demonstrate environmental benefits that would not be realized through single use projects (e.g. reduced vehicle trip traffic with the potential to reduce sources of water or air pollution). Transit-oriented developments, such as a mixed use residential or commercial area designed to maximize access to public transportation; similar to above criterion, but where the development center is within one half mile of a mass transit center (e.g. bus, rail, light rail or commuter train station). Such projects would not be able to take credit for both categories, but may have greater credit assigned Redevelopment projects in an established historic district, historic preservation area, or similar significant city area including core City Center areas (to be defined through mapping). Developments with dedication of undeveloped portions to parks, preservation areas and other pervious uses. Developments in a city center area. Developments in historic districts or historic preservation areas. Live-work developments, a variety of developments designed to support residential and vocational needs together – similar to criteria to mixed use development; would not be able to take credit for both categories. In-fill projects, the conversion of empty lots and other underused spaces into more beneficially used spaces, such as residential or commercial areas. Calculation of Water Quality Credits (if applicable) IV.4.2 Alternative Compliance Plan Information There is no alternative compliance proposed for this project. □ □ □ ·o :0 :D □ □ □ □ PA2019-098 Water Quality Management Plan (WQMP) Newport Beach Fire Station No. 2 CITY OF NEWPORT BEACH Section VII Newport Beach FS 2 - WQMP 03-09-20 Page 20 Section V Inspection/Maintenance Responsibility for BMPs BMP Inspection/Maintenance BMP Reponsible Party(s) Inspection/ Maintenance Activities Required Minimum Frequency of Activities N1 Education for Property Owners City of Newport Beach Provide materials to new employees and annual refresher to existing employees. Annually N3 Common Area Landscape Management City of Newport Beach Inspect vegetation annually. Monthly N11 Common Area Litter Control City of Newport Beach Maintain a litter-free common area and provide a sufficient number of litter receptacles for the facility. The City will implement a schedule for the proper removal of the litter receptacles for the purposes of keeping the site free of loose litter or overfilled receptacles. Continuous N14 Common Area Catch Basin Inspection City of Newport Beach Maintain and inspect the onsite drain boxes. The minimum requirements for inspection will be before and after the rainy season (Nov.-Mar.) each year. The drain boxes are required to remain clear and shall be cleaned whenever an inspection reports that a catch basin is more than 25% clogged. Before and after rainy season N15 Seeping of Parking Lot City of Newport Beach Provide sweeping and cleaning for its parking areas as needed. Hosing down the parking lot and patios is prohibited. No runoff is allowed to drain into the drain box inlets. Monthly, as needed S1 Storm Drain Signage City of Newport Beach Stencilling shall be inspected annually and repaired at anytime the stencilling is deemed illegible. Annually PA2019-098 Water Quality Management Plan (WQMP) Newport Beach Fire Station No. 2 CITY OF NEWPORT BEACH Section VII Newport Beach FS 2 - WQMP 03-09-20 Page 21 S3 Trash storage areas City of Newport Beach Inspect the trash storage areas for the integrity of the designed trash enclosure a minimum of once per year Annually S4 Efficient Irrigation Systems City of Newport Beach Inspect sprinkler system monthly to prevent overspray. Monthly Modular Wetlands City of Newport Beach Per manufacturer’s recommendations. Remove trash from screening device. Remove sediment from sedimentation chamber. Replace cartridge filter media. Trim vegetation Every 6 months. Section VI WQMP Site Plan and Reference Plans VI.1 WQMP Site Plan and Reference Plans The following plans are included for reference: • WQMP Site Plan Sheet C20 • Hydromodification Susceptibility Map PA2019-098 Water Quality Management Plan (WQMP) Newport Beach Fire Station No. 2 CITY OF NEWPORT BEACH Section VII Newport Beach FS 2 - WQMP 03-09-20 Page 22 WQMP Site Plan Sheet C20 PA2019-098 DRAINAGE DIRECTIONMODULAR WETLANDS LOCATIONBLDG. ROOF DRAINAGE CONVEYED TO MODULAR WETLANDSTRASH ENCLOSURE LOCATIONTRENCH DRAIN LOCATION TO CAPTURE RESPONSE DRIVEWAY RUNOFF.PROJECT DISCHARGE LOCATIONL NEWPORT LEGEND: L< »>I PERVIOUS LANDSCAPE AREA 7 ' □ PROPOSED NEW PORT BEACH FIRE STATION NO. 2 2807 NEWPORT BLVD _J T 6L\JD 7 dOJS I I I ,_. (/J I I I I 'oy/ ~I I I I I I ®., I I I 4, I L :I: o .. C"') N (.) 0::: c.o z <C <(~ w >m 0 al w ■ _J <( -I-::::) (_) I-0::: 0 .. c:C 0 ca I D.. I-(_) I-3: 0::: <( en w 0~ z a.. I-w LL s 0::: 0::: 0 wo ->-z a.. LL I-r--s -ow (.) ~z DRAWN: S.J. CHECKED: M.S.L. DATE: 03-20-20 SCALE: AS SHOWN PROJECT NUMBER: PRELIMINARY WOMP SITE PLAN DRAWING NUMBER: C20 PA2019-098 Water Quality Management Plan (WQMP) Newport Beach Fire Station No. 2 CITY OF NEWPORT BEACH Section VII Newport Beach FS 2 - WQMP 03-09-20 Page 23 Hydromodification Susceptibility Map PA2019-098 P:\9526E\6-GIS\Mxds\SuceptabilityMaps_20100505\9526E_NewportBaySusceptibility_20100430.mxdRiverside County Santa Ana RiverWatershed Santa Ana RiverWatershed South OrangeCounty Anaheim Bay-Huntington HarborWatershed JohnWayneAirport Lower PetersCanyonRetarding Basin Hicks CanyonRetardingBasin SiphonReservoir Round CanyonRetardingBasin Bee CanyonRetardingBasin EastfootRetardingBasin Orchard EstatesRetention Basin Agua ChinonRetardingBasin VillagePond Park Sand CanyonReservoir San JoaquinReservoir LagunaReservoir Big CanyonReservoir BonitaCanyonReservoir BasinNumber 1 NorthLake SouthLake BasinNumber 2 El Modena-IrvineRetarding Basin HarborView Dam East HicksCanyonRetarding Basin RattlesnakeReservoir TrabucoRetardingBasin MarshburnRetardingBasin FIGURE 4JOBTITLESCALE1" = 12000'DESIGNEDDRAWINGCHECKEDBMP04/30/10DATEJOB NO.9526-ETHTHORANGE COUNTYWATERSHEDMASTER PLANNINGORANGE CO.CASUSCEPTIBILITY ANALYISNEWPORT BAY-NEWPORT COASTAL STREAMS0 9,000 18,000Feet Susceptibility Potential Areas of Erosion, Habitat, &Physical Structure Susceptibility Channel Type Earth (Unstable) Earth (Stabilized) Stabilized Tidel Influence <= Mean High Water Line (4.28') Water Body Basin Dam Lake Reservoir Other Lands Airport/Military PRELIMINARY MAP – SUBJECT TO FURTHER REVISION SUSCEPTIBILITY MAP UPDATE (DEC 2012) PA2019-098 Water Quality Management Plan (WQMP) Newport Beach Fire Station No. 2 CITY OF NEWPORT BEACH Section VII Newport Beach FS 2 - WQMP 03-09-20 Page 24 Section VII Educational Materials Education Materials Residential Material (http://www.ocwatersheds.com) Check If Applicable Business Material (http://www.ocwatersheds.com) Check If Applicable The Ocean Begins at Your Front Door Tips for the Automotive Industry Tips for Car Wash Fund-raisers Tips for Using Concrete and Mortar Tips for the Home Mechanic Tips for the Food Service Industry Homeowners Guide for Sustainable Water Use Proper Maintenance Practices for Your Business Household Tips Other Material Check If Attached Proper Disposal of Household Hazardous Waste Recycle at Your Local Used Oil Collection Center (North County) OCwatersheds.com “Sewer Spill” Recycle at Your Local Used Oil Collection Center (Central County) CASQA BMP SC-41 “Building & Grounds Maintenance” Recycle at Your Local Used Oil Collection Center (South County) CASQA BMP SC-34 “Waste Handling and Disposal” Tips for Maintaining a Septic Tank System CASQA BMP SD-13 “Storm Drain Signage” Responsible Pest Control CASQA BMP SD-32 “Trash Storage Areas” Sewer Spill CASQA BMP SD-10 “Site Design & Landscape Planning” Tips for the Home Improvement Projects CASQA BMP SD-52 “Drain Inserts” Tips for Horse Care Tips for Landscaping and Gardening Tips for Pet Care Tips for Pool Maintenance Tips for Residential Pool, Landscape and Hardscape Drains Tips for Projects Using Paint D I □ □ □ □ □ □ □ ~ □ I I □ □ ~ □ ~ □ ~ □ ~ □ ~ ~ ~ □ ~ □ □ □ □ □ □ □ □ □ □ □ □ PA2019-098 Sewage Spill Regulatory Requirements This brochure was designed courtesy of the Orange County Sanitation District (OCSD). For additional information, call (714) 962-2411, or visit their website at www.ocsd.com Your Responsibilities as a Private Property Owner Reference Guide Sewage Spill Allowing sewage to discharge to a gutter or storm drain may subject you to penalties and/or out-of- pocket costs to reimburse cities or public agencies for clean-up efforts. Here are the pertinent codes, fines, and agency contact information that apply. Orange County Stormwater Program 24 Hour Water Pollution Reporting Hotline 1-877-89-SPILL (1-877-897-7455) !County and city water quality ordinances prohibit discharges containing pollutants. California Health and Safety Code, Sections 5410-5416 !No person shall discharge raw or treated sewage or other waste in a manner that results in contamination, pollution or a nuisance. !Any person who causes or permits a sewage discharge to any state waters: •must immediately notify the local health agency of the discharge. •shall reimburse the local health agency for services that protect the public’s health and safety (water-contact receiving waters). •who fails to provide the required notice to the local health agency is guilty of a misdemeanor and shall be punished by a fine (between $500–$1,000) and/or imprisonment for less than one year. !Requires the prevention, mitigation, response to and reporting of sewage spills. California Water Code, Article 4, Chapter 4, Sections 13268-13271 California Code of Regulations, Title 23, Division 3, Chapter 9.2, Article 2, Sections 2250-2260 !Any person who causes or permits sewage in excess of 1,000 gallons to be discharged to state waters shall immediately notify the Office of Emergency Services. !Any person who fails to provide the notice required by this section is guilty of a misdemeanor and shall be punished by a fine (less than $20,000) and/or imprisonment for not more than one year. Orange County Health Care Agency Environmental Health (714) 433-6419 Regional Water Quality Control Board Santa Ana Region San Diego Region (951) 782-4130 (858) 467-2952 California Office of Emergency Services (800) 852-7550 What is a Sewage Spill? You Are Responsible for a Sewage Spill Caused by a Blockage or Break in Your Sewer Lines! Grease builds up inside and eventually blocks sewer pipes. Grease gets into the sewer from food establishments, household drains, as well as from poorly maintained commercial grease traps and interceptors. Structure problems caused by tree roots in the lines, broken/cracked pipes, missing or broken cleanout caps or undersized sewers can cause blockages. Infiltration and inflow (I/I) impacts pipe capacity and is caused when groundwater or rainwater enters the sewer system through pipe defects and illegal connections. Time is of the essence in dealing with sewage spills. You are required to immediately: Control and minimize the spill. Keep spills contained on private property and out of gutters, storm drains and public waterways by shutting off or not using the water. Use sandbags, dirt and/or plastic sheeting to prevent sewage from entering the storm drain system. Clear the sewer blockage. Always wear gloves and wash your hands. It is recommended that a plumbing professional be called for clearing blockages and making necessary repairs. Always notify your city sewer/public works department or public sewer district of sewage spills. If the spill enters the storm drains also notify the Health Care Agency. In addition, if it exceeds 1,000 gallons notify the Office of Emergency Services. Refer to the numbers listed in this brochure. Caution Allowing sewage from your home, business or property to discharge to a gutter or storm drain may subject you to penalties and/or out-of-pocket costs to reimburse cities or public agencies for clean-up and enforcement efforts. See Regulatory Codes & Fines section for pertinent codes and fines that apply. What to Look For You Could Be Liable Sewage spills can be a very noticeable gushing of water from a manhole or a slow water leak that may take time to be noticed. Don’t dismiss unaccounted-for wet areas. Look for: !Drain backups inside the building. !Wet ground and water leaking around manhole lids onto your street. !Leaking water from cleanouts or outside drains. !Unusual odorous wet areas: sidewalks, external walls or ground/landscape around a building. Rev 4/06 printed on recycled paper Common Causes of Sewage Spills Overflowing cleanout pipe located on private property Keep people and pets away from the affected area. Untreated sewage has high levels of disease-causing viruses and bacteria. Call your local health care agency listed on the back for more information. DTP113 Sewage spills occur when the wastewater being transported via underground pipes overflows through a manhole, cleanout or broken pipe. Sewage spills can cause health hazards, damage to homes and businesses, and threaten the environment, local waterways and beaches. Health Care Agency Environmental Health C A AILI NFOR FO OYRTAN NGUEOCIf You See a Sewage Spill Occurring, Notify Your City Sewer/Public Works Department or Public Sewer District IMMEDIATELY! www.ocwatersheds.com P R O J E C T P R E V E N T I O N Residences Businesses Homeowner/Condominium Associations Federal and State Complexes Military Facilities Orange County Sanitation District PA2019-098 How a Sewer System Works Orange County Agency Responsibilites You Could Be Liable for Not Protecting the Environment Local and state agencies have legal jurisdic- tion and enforcement authority to ensure that sewage spills are remedied. They may respond and assist with contain- ment, relieving pipe blockages, and/or clean-up of the sewage spill, especially if the spill is flowing into storm drains or onto public property. A property owner may be charged for costs incurred by these agencies responding to spills from private properties . How You Can Prevent Sewage Spills A property owner's sewer pipes are called service laterals and are connected to larger local main and regional trunk lines. Service laterals run from the connection at the home to the connection with the public sewer (including the area under the street). These laterals are the responsibility of the property owner and must be maintained by the property owner. Many city agencies have adopted ordinances requiring maintenance of service laterals. Check with your city sewer/local public works department for more information. Operation and maintenance of local and regional sewer lines are the responsi- bility of the city sewer/public works depart- ments and public sewer districts. Preventing Grease Blockages The drain is not a dump! Recycle or dispose of grease properly and never pour grease down the drain. Homeowners should mix fats, oils and grease with absor- bent waste materials such as paper, coffee grounds, or kitty litter and place it in the trash. Wipe food scraps from plates and pans and dump them in the trash. Restaurants and commercial food service establishments should always use “Kitchen Best Management Practices.” These include: !Collecting all cooking grease and liquid oil from pots, pans and fryers in covered grease containers for recycling. !Scraping or dry-wiping excess food and grease from dishes, pots, pans and fryers into the trash. !Installing drain screens on all kitchen drains. !Having spill kits readily available for cleaning up spills. !Properly maintaining grease traps or interceptors by having them serviced regularly. Check your local city codes. !City Sewer/Public Works Departments— Responsible for protecting city property and streets, the local storm drain system, sewage collection system and other public areas. !Public Sewer/Sanitation District— Responsible for collecting, treating and disposing of wastewater. !County of Orange Health Care Agency— Responsible for protecting public health by closing ocean/bay waters and may close food-service businesses if a spill poses a threat to public health. !Regional Water Quality Control Boards— Responsible for protecting State waters. !Orange County Stormwater Program— Responsible for preventing harmful pollutants from being discharged or washed by stormwater runoff into the municipal storm drain system, creeks, bays and the ocean. 2 3 1 Never put grease down garbage disposals, drains or toilets. Perform periodic cleaning to eliminate grease, debris and roots in your service laterals. Repair any structural problems in your sewer system and eliminate any rainwater infiltration/inflow leaks into your service laterals. Sewage spills can cause damage to the environment. Help prevent them! Regional Trunk line Sewer Wastewater Treatment Plant Cleanout CleanoutGrease Trap Downspout (rain water goes into the storm drain system, not the sewer) RESIDENCE BUSINESS Manhole Local Main Sewer Line Private Service Laterals Manhole City Sewer/Public Works Departments Aliso Viejo . . . . . . . . . . . . . . . . . . . . . . . . . (949) 425-2500 Anaheim. . . . . . . . . . . . . . . . . . . . . . . . . . . (714) 765-6860 Brea . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (714) 990-7691 Buena Park . . . . . . . . . . . . . . . . . . . . . . . . (714) 562-3655 Costa Mesa . . . . . . . . . . . . . . . . . . . . . . . . (949) 645-8400 Cypress . . . . . . . . . . . . . . . . . . . . . . . . . . . (714) 229-6760 Dana Point. . . . . . . . . . . . . . . . . . . . . . . . . (949) 248-3562 Fountain Valley . . . . . . . . . . . . . . . . . . . . . (714) 593-4600 Fullerton. . . . . . . . . . . . . . . . . . . . . . . . . . . (714) 738-6897 Garden Grove. . . . . . . . . . . . . . . . . . . . . . . (714) 741-5375 Huntington Beach . . . . . . . . . . . . . . . . . . . (714) 536-5921 Irvine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (949) 453-5300 Laguna Beach . . . . . . . . . . . . . . . . . . . . . . (949) 497-0765 Laguna Hills. . . . . . . . . . . . . . . . . . . . . . . . (949) 707-2650 Laguna Niguel . . . . . . . . . . . . . . . . . . . . . . (949) 362-4337 Laguna Woods. . . . . . . . . . . . . . . . . . . . . . (949) 639-0500 La Habra. . . . . . . . . . . . . . . . . . . . . . . . . . . (562) 905-9792 Lake Forest . . . . . . . . . . . . . . . . . . . .(949) 461-3480 La Palma . . . . . . . . . . . . . . . . . . . . . . . . . . (714) 690-3310 Los Alamitos . . . . . . . . . . . . . . . . . . . . . . . (562) 431-3538 Mission Viejo. . . . . . . . . . . . . . . . . . . . . . . (949) 831-2500 Newport Beach . . . . . . . . . . . . . . . . . . . . . (949) 644-3011 Orange . . . . . . . . . . . . . . . . . . . . . . . . . . . . (714) 532-6480 Orange County. . . . . . . . . . . . . . . . . . . . . . (714) 567-6363 Placentia . . . . . . . . . . . . . . . . . . . . . . . . . . (714) 993-8245 Rancho Santa Margarita . . . . . . . . . . . .(949) 635-1800 San Clemente. . . . . . . . . . . . . . . . . . . . . . . (949) 366-1553 San Juan Capistrano . . . . . . . . . . . . . . . . (949) 443-6363 Santa Ana . . . . . . . . . . . . . . . . . . . . . . . . . (714) 647-3380 Seal Beach. . . . . . . . . . . . . . . . . . . . . . . . . (562) 431-2527 Stanton . . . . . . . . . . . . . . . . . . . . . . . . . . . (714) 379-9222 Tustin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (714) 962-2411 Villa Park . . . . . . . . . . . . . . . . . . . . . . . . . . (714) 998-1500 Westminster . . . . . . . . . . . . . . . . . . . . . . . (714) 893-3553 Yorba Linda . . . . . . . . . . . . . . . . . . . . . . . . (714) 961-7170 Public Sewer/Water Districts Costa Mesa Sanitary District . . . . . . . . . . (714) 393-4433/ (949) 645-8400 El Toro Water District . . . . . . . . . . . . . . . . (949) 837-0660 Emerald Bay Service District . . . . . . . . . . (949) 494-8571 Garden Grove Sanitary District . . . . . . . . . (714) 741-5375 Irvine Ranch Water District . . . . . . . . . . . . (949) 453-5300 Los Alamitos/Rossmoor Sewer District . . . (562) 431-2223 Midway City Sanitary District (Westminster)(714) 893-3553 Moulton Niguel Water District . . . . . . . . . (949) 831-2500 Orange County Sanitation District. . . . . . . (714) 962-2411 Santa Margarita Water District . . . . . . . . (949) 459-6420 South Coast Water District . . . . . . . . . . . . (949) 499-4555 South Orange County Wastewater Authority (949) 234-5400 Sunset Beach Sanitary District. . . . . . . . . (562) 493-9932 Trabuco Canyon Sanitary District . . . . . . . (949) 858-0277 Yorba Linda Water District . . . . . . . . . . . . (714) 777-3018 Other Agencies Orange County Health Care Agency . . . . . (714) 433-6419 Office of Emergency Services. . . . . . . . . . (800) 852-7550 Report Sewage Spills!-PA2019-098 For more information, please call the Orange County Stormwater Program at 1-877-89-SPILL (1-877-897-7455) or visit www.ocwatersheds.com To report a spill, call the Orange County 24-Hour Water Pollution Problem Reporting Hotline at 1-877-89-SPILL (1-877-897-7455). For emergencies, dial 911. Proper Maintenance Practices for Your Business The Ocean Begins at Your Front Door PROJECT PREVENTION Help Prevent Ocean Pollution: Preventing water pollution at your commercial/industrial site Clean beaches and healthy creeks, rivers, bays and ocean are important to Orange County. However, many landscape and building maintenance activities can lead to water pollution if you’re not careful. Paint, chemicals, plant clippings and other materials can be blown or washed into storm drains that flow to the ocean. Unlike water in sanitary sewers (from sinks and toilets), water in storm drains is not treated before entering our waterways. You would never pour soap or fertilizers into the ocean, so why would you let them enter the storm drains? Follow these easy tips to help prevent water pollution. Some types of industrial facilities are required to obtain coverage under the State General Industrial Permit. For more information visit: www.swrcb.ca.gov/stormwater/industrial.html Printed on Recycled Paper RECYCLE USED OIL 0 PA2019-098 Tips for Pool Maintenance Call your trash hauler to replace leaking dumpsters. Do not dump any toxic substance or liquid waste on the pavement, the ground, or near a storm drain. Even materials that seem harmless such as latex paint or biodegradable cleaners can damage the environment. Recycle paints, solvents and other materials. For more information about recycling and collection centers, visit www.oclandfills.com. Store materials indoors or under cover and away from storm drains. Use a construction and demolition recycling company to recycle lumber, paper, cardboard, metals, masonry, carpet, plastic, pipes, drywall, rocks, dirt, and green waste. For a listing of construction and demolition recycling locations in your area, visit www.ciwmb.ca.gov/recycle. Properly label materials. Familiarize employees with Material Safety Data Sheets. Landscape Maintenance Compost grass clippings, leaves, sticks and other vegetation, or dispose of it at a permitted landfill or in green waste containers. Do not dispose of these materials in the street, gutter or storm drain. Irrigate slowly and inspect the system for leaks, overspraying and runoff. Adjust automatic timers to avoid overwatering. Follow label directions for the use and disposal of fertilizers and pesticides. Do not apply pesticides or fertilizers if rain is expected within 48 hours or if wind speeds are above 5 mph. Do not spray pesticides within 100 feet of waterways. Fertilizers should be worked into the soil rather than dumped onto the surface. If fertilizer is spilled on the pavement or sidewalk, sweep it up immediately and place it back in the container. Building Maintenance Never allow washwater, sweepings or sediment to enter the storm drain. Sweep up dry spills and use cat litter, towels or similar materials to absorb wet spills. Dispose of it in the trash. If you wash your building, sidewalk or parking lot, you must contain the water. Use a shop vac to collect the water and contact your city or sanitation agency for proper disposal information. Do not let water enter the street, gutter or storm drain. Use drop cloths underneath outdoor painting, scraping, and sandblasting work, and properly dispose of materials in the trash. Use a ground cloth or oversized tub for mixing paint and cleaning tools. Use a damp mop or broom to clean floors. Cover dumpsters to keep insects, animals, rainwater and sand from entering. Keep the area around the dumpster clear of trash and debris. Do not overfill the dumpster. PROJECT PREVENTION Proper Maintenance Practices for your Business Never Dispose of Anything in the Storm Drain. ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ PoHuhol'l PA2019-098 Building & Grounds Maintenance SC-41 Description St ormwat er mno ff from building and grou nds m aint en an ce act ivities can b e contaminated with t oxic h ydrocarbon s in solvents, fertilizer s and p esticides, s u spended solid s, h eavy met als , and abnormal pH. Utilizing the followin g p rotocols will prevent or r educe the disch arge of pollutants t o st o rmwat er from buildin g a nd grounds m aintenance activities b y washing and clea ning up with as little wat e r as p ossible, following good landscap e m an agem e nt practices, preventing an d cle aning up s pills imme diat ely, ke ep ing debris from ente ring the s tor m drains , and m a intaining the st o rmwat er collection syst e m . Approach Pollution Pre vention ■ Swit ch t o n o n-toxic ch emicals for m ainten a n ce wh e n possible. ■ Ch oose cleaning agents that can b e r ecycled. ■ Enco urage proper l awn m an agement and la n dscaping, including u se of n ative veget atio n. ■ Encourage u s e of Integrated P est Man age ment techniques for pest control. ■ Encourage p rop er ons ite r ecycling of yard trimmings. ■ Recycle r esidual p aints, solvents, lumber , a nd other m at erial as much as p ossible . January 2003 Californi a Sto rmwater BMP Handbook Municipal www .cabmphandbooks.com Objectives ■ Cover ■ Contain ■ Educate ■ Reduce/Minimize ■ Product Substitution Targeted Constituents Sediment Nutrients Trash Metals Bacteria Oil and Grease Organics Oxygen Demanding CALIFORKI/\STOR.\.IWATER L I 1 of 5 PA2019-098 SC-41 Building & Grounds Maintenance Suggested Protocols Pressure Washing of Buildings, Rooftops, and Other Large Objects ■ In situations where soaps or detergents are used and the surrounding area is paved, pressure washers must use a waste water collection device that enables collection of wash water and associated solids. A sump pump, wet vacuum or similarly effective device must be used to collect the runoff and loose materials. The collected runoff and solids must be disposed of properly. ■ If soaps or detergents are not used, and the surrounding area is paved, wash water runoff does not have to be collected but must be screened. Pressure washers must use filter fabric or some other type of screen on the ground and/or in he catch basin to trap the particles in wash water runoff. ■ If you are pressure washing on a grassed area (with or without soap), runoff must be dispersed as sheet flow as much as possible, rather than as a concentrated stream. The wash runoff must remain on the grass and not drain to pavement. Ensure that this practice does not kill grass. Landscaping Activities ■ Do not apply any chemicals (insecticide, herbicide, or fertilizer) directly to surface waters, unless the application is approved and permitted by the state. ■ Dispose of grass clippings, leaves, sticks, or other collected vegetation as garbage, or by composting. Do not dispose of collected vegetation into waterways or storm drainage systems. ■ Use mulch or other erosion control measures on exposed soils. ■ Check irrigation schedules so pesticides will not be washed away and to minimize non- stormwater discharge. Building Repair, Remodeling, and Construction ■ Do not dump any toxic substance or liquid waste on the pavement, the ground, or toward a storm drain. ■ Use ground or drop cloths underneath outdoor painting, scraping, and sandblasting work, and properly dispose of collected material daily. ■ Use a ground cloth or oversized tub for activities such as paint mixing and tool cleaning. ■ Clean paint brushes and tools covered with water-based paints in sinks connected to sanitary sewers or in portable containers that can be dumped into a sanitary sewer drain. Brushes and tools covered with non-water-based paints, finishes, or other materials must be cleaned in a manner that enables collection of used solvents (e.g., paint thinner, turpentine, etc.) for recycling or proper disposal. 2 of S California Stormwater BMP Handbook Municipal www.cabmphandbooks.com January 2003 PA2019-098 Building & Grounds Maintenance SC-41 ■ Use a storm drain cover, filter fabric, or similarly effective runoff control mechanism if dust, grit, wash water, or other pollutants may escape the work area and enter a catch basin. The containment device(s) must be in place at the beginning of the work day, and accumulated dirty runoff and solids must be collected and disposed of before removing the containment device(s) at the end of the work day. ■ If you need to de-water an excavation site, you may need to filter the water before discharging to a catch basin or off-site. In which case you should direct the water through hay bales and filter fabric or use other sediment filters or traps. ■ Store toxic material under cover with secondary containment during precipitation events and when not in use. A cover would include tarps or other temporary cover material. Mowing, Trimming, and Planting ■ Dispose of leaves, sticks, or other collected vegetation as garbage, by composting or at a permitted landfill. Do not dispose of collected vegetation into waterways or storm drainage systems. ■ Use mulch or other erosion control measures when soils are exposed. ■ Place temporarily stockpiled material away from watercourses and drain inlets, and berm or cover stockpiles to prevent material releases to the storm drain system. ■ Consider an alternative approach when bailing out muddy water; do not put it in the storm drain, pour over landscaped areas. ■ Use hand or mechanical weeding where practical. Fertilizer and Pesticide Management ■ Follow all federal, state, and local laws and regulations governing the use, storage, and disposal of fertilizers and pesticides and training of applicators and pest control advisors. ■ Follow manufacturers' recommendations and label directions. Pesticides must never be applied if precipitation is occuring or predicted. Do not apply insecticides within 100 feet of surface waters such as lakes, ponds, wetlands, and streams. ■ Use less toxic pesticides that will do the job, whenever possible. Avoid use of copper-based pesticides if possible. ■ Do not use pesticides if rain is expected. ■ Do not mix or prepare pesticides for application near storm drains. ■ Use the minimum amount needed for the job. ■ Calibrate fertilizer distributors to avoid excessive application. ■ Employ techniques to minimize off-target application ( e.g. spray drift) of pesticides, including consideration of alternative application techniques. January 2003 California Stormwater BMP Handbook Municipal www.cabmphandbooks.com 3 of 5 PA2019-098 SC-41 Building & Grounds Maintenance ■ Apply pesticides only when wind s peeds a re low . ■ Work fertilizers into the soil rather than dumping o r broadcasting them onto the surface. ■ Irrigate slowly to prevent runoff and then only as much as is needed. ■ Clean pavem ent and s idewalk if fertilizer is s pilled o n these s mfaces before applying irrigation wat er. ■ Dis p ose of empty pesticide containers according to the ins tructions o n the container label. ■ Use up the pes ticides. Rinse containers, a nd u se rinse water as product. Disp ose of unused pesticide as h azardous waste. ■ Implement st orage requirements for pesticide products with guidance from the l ocal fire department and County Agricultural Commissioner. Provide secondary containment for pesticides. Inspection ■ Ins pect inigation system pe1iodically to ensure that the 1ight amount of water is being a pplied and that excessive runoff is not occuning. Minimize excess watering, a nd repair leaks in the irrigation system as soon as they are observed. Training ■ Educat e a nd train employees on use of pesticides and in p esticide application t echniques to prevent pollution. ■ Train employees and contr actors in proper techniques for s pill containment a nd cleanup. ■ Be s ure the frequency of training t akes into account the complexity of the operations and the n atur e of the staff. Spill Response and Prevention ■ Refer to SC-11, Spill Prevention, Control & Cleanup ■ Keep your Spill Prevention Control and countermeasure (SPCC) plan up-to-date, and implement accordingly. ■ H ave spill cleanup m aterial s readily available and in a known location. ■ Cleanup spills immediat ely a nd u se dry methods if possible. ■ Properly dispose of spill cleanup mate1ial. Other Considerations ■ Alternative pest/weed controls may not be available, s uitable, or effective in m a n y cases. 4 of S California Stormwater BMP Handbook Municipal www .cabmphandbooks.com January 2003 PA2019-098 Building & Grounds Maintenance SC-41 Requirements Costs ■ Overall costs should be low in comparison to other BMPs. Maintenance ■ Sweep paved areas regularly to collect loose pa1ticles, and wipe up spills with rags and other absorbent material immediately, do not hose down the area to a storm drain. Supplemental Information Further Detail of the BMP Fire Sprinkler Line F/_ushing Building fire sprinkler line flushing may be a source of non-stormwater runoff pollution. The water entering the system is usually potable water though in some areas it may be non-potable reclaimed wastewater. There are subsequent factors that may drastically reduce the quality of the water in such systems. Black iron pipe is usually used since it is cheaper than potable piping but it is subject to rusting and results in lower quality water. Initially the black iron pipe has an oil coating to protect it from rusting between manufacture and installation; this will contaminate the water from the first flush but not from subsequent flushes. Nitrates, poly- phosphates and other corrosion inhibitors, as well as fire suppressants and antifreeze may be added to the sprinkler water system. Water generally remains in the sprinkler system a long time, typically a year, between flushes and may accumulate iron, manganese, lead, copper, nickel and zinc. The water generally becomes anoxic and contains living and dead bacteria and breakdown products from chlorination. This may result in a significant BOD problem and the water often smells. Consequently dispose fire sprinkler line flush water into the sanitary sewer. Do not allow discharge to storm drain or infiltration due to potential high levels of pollutants in fire sprinkler line water. References and Resources California's Nonpoint Source Program Plan http://www.swrcb.ca.gov/nps/index.html King County-ftp://dnr.metrokc.gov/wlr/dss/spcm/Chapter%2o3.PDF Orange County Stormwater Program http:/ /www.ocwatersheds.com/Storm Water/ swp_introduction.asp Mobile Cleaners Pilot Program: Final Report. 1997. Bay Area Stormwater Management Agencies Association (BASSMA) http://www.basmaa.org/ Pollution from Surface Cleaning Folder. 1996. Bay Area Stormwater Management Agencies Association (BASMAA) http://www.basmaa.org/ San Diego Stormwater Co-permittees Jurisdictional Urban Runoff Management Program (URMP)- http://www.projectcleanwater.org/pdf/Model%20Program%20Municipal%20Facilities.pdf January 2003 California Stormwater BMP Handbook Municipal www.cabmphandbooks.com S of S PA2019-098 Waste Handling & Disposal Description Improper s torage and handling of solid wast es can allow toxic compounds, oils and greases, heavy metals, nutrients, s u spended s olids, and other pollutants to enter stormwater runoff. The discharge of pollutants to stormwater from waste handling and dispos al can be prevented and reduced b y tracking waste generation, storage, and disposal; reducing waste generation and dis posal through source reduction, re-us e, and recy cling; and preventing runon and runoff. Approach Pollution Prevention ■ Reduction in the amount of waste generated can be accomplished u s ing the following source controls s uch as: Production planning and s equencing Process or equipment modification Raw material s ubstitution or elimination Lo ss prevention and h o u sekeeping Waste segregation and separation Close loop recycling ■ Establish a m aterial tracking system to increase awareness about material u sage . This may reduce s pills and minimize contamination, thus reducing the amount of waste produced . ■ Recycle m aterials whenever possible. January 2003 Californi a Stormwater BMP Handbook Municipal www .cabmphandbooks.com SC-34 Objectives ■ Cover ■ Contain ■ Ed ucate ■ Reduce/Mini mize ■ Product Substitution Targeted Constituents Sediment 0 Nutrients 0 Trash 0 Metals 0 Bacteria 0 Oil and Grease 0 Organics 0 Oxygen Demanding 0 CALIFOR!\I /\ STO R.\1\1' ,\ TER l 1 of 5 PA2019-098 SC-34 Waste Handling & Disposal Suggested Protocols General ■ Cover storage containers with leak proof lids or some other means. If waste is not in containers, cover all waste piles (plastic tarps are acceptable coverage) and prevent stormwater run on and runoff with a berm. The waste containers or piles must be covered except when in use. ■ Use drip pans or absorbent materials whenever grease containers are emptied by vacuum trucks or other means. Grease cannot be left on the ground. Collected grease must be properly disposed of as garbage. ■ Check storage containers weekly for leaks and to ensure that lids are on tightly. Replace any that are leaking, corroded, or otherwise deteriorating. ■ Sweep and clean the storage area regularly. If it is paved, do not hose down the area to a storm drain. ■ Dispose of rinse and wash water from cleaning waste containers into a sanitary sewer if allowed by the local sewer authority. Do not discharge wash water to the street or storm drain. ■ Transfer waste from damaged containers into safe containers. ■ Take special care when loading or unloading wastes to minimize losses. Loading systems can be used to minimize spills and fugitive emission losses such as dust or mist. Vacuum transfer systems can minimize waste loss. Controlling Litter ■ Post "No Littering" signs and enforce anti-litter laws. ■ Provide a sufficient number oflitter receptacles for the facility. ■ Clean out and cover litter receptacles frequently to prevent spillage. Waste Collection ■ Keep waste collection areas clean. ■ Inspect solid waste containers for structural damage or leaks regularly. Repair or replace damaged containers as necessary. ■ Secure solid waste containers; containers must be closed tightly when not in use. ■ Place waste containers under cover if possible. ■ Do not fill waste containers with washout water or any other liquid. ■ Ensure that only appropriate solid wastes are added to the solid waste container. Certain wastes such as hazardous wastes, appliances, fluorescent lamps, pesticides, etc. may not be 2 of S California Stormwater BMP Handbook Municipal www.cabmphandbooks.com January 2003 PA2019-098 Waste Handling & Disposal SC-34 disposed of in solid waste containers (see chemical/ hazardous waste collection section below). ■ Do not mix wastes; this can cause chemical reactions, make recycling impossible, and complicate disposal. Good Housekeeping ■ Use all of the product before disposing of the container. ■ Keep the waste management area clean at all times by sweeping and cleaning up spills immediately. ■ Use d1y methods when possible (e.g. sweeping, use of absorbents) when cleaning around restaurant/food handling dumpster areas. If water must be used after sweeping/using absorbents, collect water and discharge through grease interceptor to the sewer. ■ Stencil storm drains on the facility's property with prohibitive message regarding waste disposal. Chemical/Hazardous Wastes ■ Select designated hazardous waste collection areas on-site. ■ Store hazardous materials and wastes in covered containers protected from vandalism, and in compliance with fire and hazardous waste codes. ■ Place hazardous waste containers in secondary containment. ■ Make sure that hazardous waste is collected, removed, and disposed of only at authorized disposal areas. Runon/Runoff Prevention ■ Prevent stormwater runon from entering the waste management area by enclosing the area or building a berm around the area. ■ Prevent the waste materials from directly contacting rain. ■ Cover waste piles with temporary covering material such as reinforced tarpaulin, polyethylene, polyurethane, polypropyleneor hypalon. ■ Cover the area with a permanent roof if feasible. ■ Cover dumpsters to prevent rain from washing waste out of holes or cracks in the bottom of the dumpster. ■ Move the activity indoor after ensuring all safety concerns such as fire hazard and ventilation are addressed. Inspection January 2003 California Sto rmwater BMP Handbook Municipal www.cabmphandbooks.com 3 of 5 PA2019-098 SC-34 Waste Handling & Disposal ■ Inspect and replace faulty pumps or hoses regularly to minimize the potential of releases and spills. ■ Check waste management areas for leaking containers or spills. ■ Repair leaking equipment including valves, lines, seals, or pumps promptly. Training ■ Train st aff pollution prevention measures and proper disposal methods. ■ Train employees and contractors proper spill containment a nd cleanup. The empl oyee should have the tools and knowledge to immediately begin cleaning up a spill if one should occur. ■ Train employees and s ubcontractors in proper hazardous waste management. Spill Response and Prevention ■ Refer to SC-11, Spill Prevention, Control & Cleanup. ■ Keep your Spill Prevention Control and countermeasure (SPCC) plan up-to-date, and implement accordingly. ■ H ave spill cleanup materials readily available and in a known location. ■ Cleanup spills immediately a nd u se dry methods if possible. ■ Properly dispose of s pill cleanup material. ■ Vehicles transporting waste should h ave spill prevention equipme nt that can prevent spills during transport. The s pill prevention equipment includes: Vehicles equipped with baffles for liquid waste Trucks with sealed gates and spill guards for solid waste Other Considerations ■ H azardous wast e cannot be re-used or recycled; it must be disposed ofby a licensed hazardous waste h auler. Requirements Costs ■ Capital a nd operation and maintenance cost s will vary sub stantially depending on the s ize of the facility and the types of waste h andled. Costs s hould be low if ther e is an inventory program in place. Maintenance ■ None except for m aintaining equipment for material tracking program. 4 of S California Stormwater BMP Handbook Municipal www .cabmphandbooks.com January 2003 PA2019-098 Waste Handling & Disposal SC-34 Supplemental Information Further Detail of the BMP Land Treatment System ■ Minimize the runoff of polluted stormwater from land application of municipal waste on-site b y: Choosing a s ite where s lopes are under 6%, the soil is permeable, there is a low water table, it is located away from wetlands or marshes, there is a closed drainage system. Avoiding application of waste to the site when it is raining or when the ground is saturated with water. Growing vegetation on land dis posal areas to stabilize soils and reduce the volume of surface water runoff from the s ite. Maintaining adequate barriers between the land application s ite and the receiving waters. Planted strips are particularly good. Using erosion control techniques s uch as mulching and matting, filter fences, straw bales, diversion terracing, and sediment bas ins. Performing routine maintenance to ensure the erosion control or s ite stabilization meas ures are working. References and Resources King County Stormwater Pollution Control Manual-http://dnr.metrokc.gov/wlr/dss/sp cm.htm Orange County Stormwater Program http://www.ocwatersheds.com /Storm Water/swp_introduction.asp Pollution from Surface Cleaning Folder. 1996. Bay Area Stormwater Management Agencies Associations (BASMAA). On-line: http://www.basmaa.org January 2003 California Stormwater BMP Handbook Municipal www .cabmphandbooks.com S of S PA2019-098 Storm Drain Signag1e Description SD-13 Design Objectives Maximize Infiltration Provide Retention Slow Runoff Min imize Impervious Land Coverage 0 Prohibit Dumping of Improper Materials Contain Pollutants Collect and Convey Waste materials dumped into s torm drain inlets can have severe impacts on receiving and ground waters . Posting notices regarding discharge prohibitions at storm drain inlets can prevent waste dumping. Storm drain signs and stencils are highly visible source controls that are typically placed directly adjacent to storm drain inlets. Approach The stencil or affixed sign contains a brief s tatement that prohibits dumping of improper materials into the urban runoff conveyance system. Storm drain messages have become a popular method of alerting the public about 1the effects of and the prohibitions against waste disposal. Suitable Applications Stencils and signs alert the public to the destination of pollutants dis charged to the storm drain. Signs are appropriate in res idential, commercial, and industrial areas, as well as any other area where contributions or dumping to storm drains is likely. Design Considerations Storm drain message markers or placards ane recommended at all storm drain inlets within the boundary of a development project. The mairker should be placed in clear s ight facing toward anyone approaching the inlet from either s ide. All storm drain inlet locations s hould be identified on the development s ite map. Designing New Installations The following methods should be considered for inclus ion in the project design and s how on project plans: ■ Provide stenciling or labeling of all storm drain inlets and catch b asins, constructed or modified, within the project area with prohibitive language. Examples include "NO DUMPING January 2003 Californ ia St ormwater BMP Handbook New Development and Redevelopment www .cabrnpha ndbooks.com CA LIFQK!\.I A ST()RM\\'A rF:R I I I 1 of 2 PA2019-098 SD-13 Storm Drain Signage -DRAINS TO OCEAN" and/or other graphical icons to discourage illegal dumping. ■ Pos t signs with prohibitive language and/or graphical icons, which prohibit illegal dumping at public access points along channels and creeks within the project area. Note -Some local agencies have approved s pecific s ignage and/or storm drain message placards for use. Consult local agency stormwater s taff to determine specific requirements for placard types and methods of application. Redeveloping Existing Installations Various jurisdictional stormwater m anagement and mitigation plans (SUSMP, WQMP, etc.) d efine "redevelopment" in terms of amounts of additional impervious area, increases in gross floor area and/or exterior construction, and land dis:turbing activities with structural or impervious smfaces. If the project meets the definition of "redevelopment", then the requirements stated under " designing new installatiions" above should be included in all project design plans. Additional Information Maintenance Considerations ■ Legibility of markers and signs should b e maintained. If required by the agency with jurisdiction over the project, the owner/operator or homeowner's association should enter into a maintenance agreement with the agency or record a deed restriction upon the property title to maintain the legibility of placards or s igns . Placement ■ Signage on top of curbs tends to weather and fad le. ■ Signage on face of curbs tends to be worn by contact with vehicle tires and sweeper brooms. Supplemental Information Examples ■ Most MS4 programs have storm drain s ignage p1rograms. Some MS4 programs will provide s tencils, or arrange for volunteer s to st encil storm drains as pa1t of their outreach program. Other Resources A Manual for the Standard Urban Stormwat er Mitigation Plan (S USMP), Los Angeles County Depa1tment of Public Works, May 2002. Model Standard Urban Storm Water Mitigation Plan (SUSMP) for San Diego County, Port of San Diego, and Cities in San Diego County, February 14, 2002. Model Water Quality Management Plan (WQMP) for County of Orange, Orange County Flood Control District, a nd the Incorporated Cities of Orange County, Draft February 2003. Ventura Countywide Technical Guidance Manual fo1r Stormwater Quality Control Measures, July 2002. 2 of 2 Californ ia Stormwater BMP Handbook New Development and Redevelopment www .cabmphandb-ooks.com January 2003 PA2019-098 Trash Storage Areas Description Trash storage areas are areas where a trash receptacle (s) are located for u se as a repository for solid wastes. Stonnwater runoff from areas where trash is s tored or disposed of can be polluted. In addition, loose trash and debris can be easily transported by water or wind into nearby storm drain inlets, channels, and/or creeks. Waste handling operations that may be sources of stormwater pollution include dumpsters, litter control, and waste piles . Approach This fact sheet contains details on the specific meas ures required to prevent or reduce pollutants in stormwater runoff associated with trash storage and handling. Preventative measures including enclosures, containment s tructures, and impervious pavements to mitigate spills, should be used to reduce the likelihood of contamination. Suitable Applications SD-32 Design Objectives Maximize Infiltration Provide Retention Slow Runoff Min imize Impervious Land Coverage Prohibit Dumping of Improper Materials 0 Contain Pollutants Collect and Convey Appropriate applications include residential, commercial and industrial areas planned for development or redevelopment. (Detached residential single-family homes are typically excluded from this requirement.) Design Considerations Design requirements for waste handling areas are governed by Building and Fire Codes, and by current local agency ordinances and zoning requirements. The des ign criteria described in this fact sheet are meant to enhance and be consistent with these code and ordinance requirements. Hazardous waste should be handled in accordance with legal requirements established in Title 22, California Code of Regulation . Wastes from commercial and industrial sites are typically hauled by either public or commercial carriers that may have design or access requirements for waste storage areas. The design criteria in this fact sheet are recommendatioltls and are not intended to be in conflict with requirements established by the waste haule1r. The waste hauler should be contacted prior to the design of your site trash collection areas. Conflicts or issues should be discussed with the local agency. Designing New Installations Trash storage areas s hould be designed to consider the following structural or treatment control BMPs: ■ Des ign trash container areas so that drailtlage from adjoining roofs and pavement is diverted around the area(s) to avoid run-on. This might include berming or grading the waste handling area to prevent run-on of stormwater. ■ Make sure trash container areas are screened or walled to prevent off-site transport of trash. January 2003 California Stormwater BMP Handbook New Development and Redevelopment www .cabrnpha ndbooks.com CA LIFQK!\.I A ST()RM\\'A rF:R I I I 1 of 2 PA2019-098 SD-32 T'rash Storage Areas ■ Use lined bins or dumpst ers t o reduce leaking of liquid waste. ■ Provide roofs, awnings, or attached lids on all trash containers to minimize direct precipitation and prevent rainfall from entering containers. ■ Pave trash s torage areas w ith an impe rvious surface to mitigate spills . ■ Do not locate s torm drains in immediat e vicinity of the trash storage area. ■ Post signs on all dumpst ers informing u sers that hazardous m at erials are not to be disposed of therein. Redeveloping Existing Installations Various jurisdictional stormwater m anagem ent and mitigation plan s (SUSMP, WQMP, etc.) define "redevelopment" in terms of amounts of additional impervious area, increases in gross floor area and/or exterior con struction, and land dis:turbing activities with structural or impervious s urfaces . The definition of" redevelopment" must be consulted t o determine whether or not the requirements for new development apply t o areas intended for redevelopment. If the definition applies, the s t eps outlined under "designing new installations" above should b e followed. Additional Information Maintenance Considerations The integrity of s tructural elements that are subject t o damage (i.e., screens, cover s, and signs) must be maintained b y the owner/operator. Maintenance agreements between the local agency and the owner/operator may be r equired. Some age ncies will require maintenance deed restrictions to be recorded of the property title. If req uired by the local agency, maintenance agreements or deed restrictions must be executed by the owner/operator b efore improvem ent pla ns are approved. Other Resources A Manual for the Standard Urban Stormwater Mitigation Plan (SUSMP), Lo s Angeles County Depa1tment of Public Works, May 2002. Model Standard Urban Storm Water Mitigation Plan (SUSMP) for San Diego County, Port of San Diego, and Cities in San Diego County, February 14, 2002. Model Water Quality Management Plan (WQMP) for County of Orange, Orange County Flood Control District, and the Incorporated Cities of Orange Co unty, Draft Februa1y 2003. Ventura Countywide T echnical Guidance Manual fo 1r Stormwater Quality Control Measures, July 2002. 2 of 2 Californ ia Stormwater BMP Handbook New Development and Redevelopment www .cabmphandb-ooks.com January 2003 PA2019-098 Site Design & Land!scape Planning SD-10 Description Design Objectives 0 Maximize Infiltration 0 Provide Retention 0 Slow Runoff 0 Min imize Impervious Land Coverage Prohibit Dumping of Improper Materials Con tain Pollutants Collect and Convey Each project site possesses unique topographic, hydrologic, and vegetative features, some of which are more suitable for development than others. Integrating and incorporating a ppropriate landscape planning methodologiies into the project design is the most effective action that can be done to minimize surface and groundwater contamination from stormwater. Approach Landscape planning should couple considerntion of land s uitability for urban uses with consideration of community goals and projected growth. Project plan designs should conserve natural areas to the extent possible, maximiz;e natural water storage and infiltration opportunities, and protect slopes and channels. Suitable Applications Appropriate applications include res idential, commercial and industrial areas planned for development or redevelopment. Design Considerations Design requirements for site design and landlscapes planning should conform to applicable standards and s pecifications of agencies with jurisdiction and be consistent with applicable General Plan and Local Area Plan policies. January 2003 Californ ia Stormwater BMP Handbook New Development and Redeve lopment www .cabrnphandbooks.com CA I !FOR.'\.! A STO R.\1\\ A rER I I I 1 of 4 PA2019-098 SD-10 Site Design & l.andscape Planning Designing New Installations Begin the development of a plan for the landscape unit with attention to the following general principles: ■ Formulate the plan on the basis of clearly articulated community goals. Carefully identify conflicts and choices between retaining and protecting des ired resources and community growth. ■ Map and assess land suitability for urban u ses. Include the following landscape features in the assessment: wooded land, open unwooded land, steep slopes, erosion-prone soil s, foundation suitability, soil suitability for waste disposal, aquifers, aquifer recharge areas, wetlands, floodplains, surface waters, ag1icultural lands, and va1ious categories of urban land use. When appropriate, the assessment can highlight outstanding local or regional resources that the community determines should be protected (e.g., a scenic area, recreational area, threatened species habitat, farmland, fish run). Mapping and assessment should recognize not only these resources but also additional areas needed for their s ustenance. Project plan designs should conserve natural areas to the extent possible, maximize natural water storage and infiltration opportunities, and protect slopes and channels. Conserve Natural Areas during Landscape Planning If applicable, the following items are required and must be implemented in the site layout during the s ubdivision design and approval process, consistent with applicable General Plan and Local Area Plan policies : ■ Cluster development on least-sensitive portions of a site while leaving the remaining land in a natural undisturbed condition. ■ Limit clearing and grading of native vegetation at a s ite to the minimum amount needed to build lots, allow access, and provide fire protection. ■ Maximize trees and other vegetation at each s ite by planting additional vegetation, clustering tree areas, and promoting the u se of native and/or drought tolerant plants. ■ Promote natural vegetation by using parking lot islands and other landscaped areas. ■ Preserve riparian areas and wetlands. Maximize Natural Water Storage and Infiltration Opportunities Within the Landscape Unit ■ Promote the conservation of forest cover. Building on land that is already defores ted affects basin hydrology to a lesser extent than conve1ting forested land. Lo ss of forest cover reduces interception storage, detention in the organic forest floor layer, and water losses by evapotranspiration, resulting in large peak runoff increases and either their negative effects or the expense of counte1ing them with structural solutions. ■ Maintain natural storage reservoirs and drainage corridors, including depressions, areas of permeable soils, swales, and intermittent streams . Develop and implement policies and 2 of 4 Californ ia Stormwater BMP Handbook New Development and Redevelopment www .cabmphandb-ooks.com January 2003 PA2019-098 Site Design & Land!scape Planning SD-10 regulations to discourage the clearing, filling, and channelization of these features. Utilize them in drainage networks in preference to pipes, culverts, and engineered ditches. ■ Evaluating infiltration opportunities b y referring to the stormwater management manual for the juris diction and pay particular attention to the selection criteria for avoiding groundwater contamination, poor soils, and hydrogeological conditions that cause these facilities to fail. If necessary, locate devellopments with large amounts of impervious surfaces or a potential to produce relatively contaminated runoff away from groundwater recharge areas. Protection of Slopes and Channels during Landscape Design ■ Convey runoff safely from the tops of slopes. ■ Avoid disturbing s teep or unstable slopes. ■ Avoid disturbing natural channels. ■ Stabilize disturbed slopes as quickly as possible. ■ Vegetate slopes with native or drought tolerant vegetation. ■ Control and treat flows in landscaping arnd/or other controls prior to reaching existing natural drainage systems. ■ Stabilize temporary and permanent channel crossings as quickly as possible, and ensure that increases in run-off velocity and frequency caused by the project do not erode the channel. ■ Install energy dissipaters, such as riprap, at the outlets of new storm drains, culverts, conduits, or channels that enter unlined channels in accordance with applicable specifications to minimize erosion. Ener:gy dissipaters shall be installed in such a way as to minimize impacts to receiving waters. ■ Line on-site conveyance channels where .appropriate, to reduce erosion caused by increased flow velocity due to increases in tributary impervious area. The first choice for linings should be grass or some other vegetative s urface, since these materials not only reduce runoff velocities, but also provide water quality benefits from filtration and infiltration. If velocities in the channel are high enough to erode grass or other vegetative linings, riprap, concrete, soil cement, or geo-grid stabilization are other alternatives. ■ Consider other design principles that are comparable and equally effective. Redeveloping Existing Installations Various jurisdictional stormwater management and mitigation plans (SUSMP, WQMP, etc.) define "redevelopment" in terms of amounts of additional impervious area, increases in gross floor area and/ or exterior construction, and ]land disturbing activities with structural or impervious surfaces. The definition of" red,evelopment" must be consulted to determine whether or not the requirements for new development apply to areas intended for redevelopment. If the definition applies, the steps outlined under "des igning new installations" above should be followed. January 2003 California Stormwater BMP Handbook New Development and Redevelopment www .cabrnpha ndbooks.com 3 of 4 PA2019-098 SD-10 Site Design & l.andscape Planning Redevelopment may present significant opportunity to add features which had not previously been implemented. Examples include incorporation of depressions, areas of permeable soils, and swales in newly redeveloped areas. While some site constraints may exist due to the st atus of already existing infrastructure, opportunities should not be missed to maximize infiltration, slow runoff, reduce impervious areas, disconnect directly connected impervious areas. Other Resources A Manu al for the Standard Urban Stormwater Mitigation Plan (SUSMP), Lo s Angeles County Department of Public Works, May 2002. Stormwater Management Manual for Western Washington, Washingt on State Department of Ecology, August 2001. Model Standard Urban Storm Water Mitigation Plan (SUSMP) for San Diego County, P ort of San Diego, and Cities in San Diego County, February 14, 2002. Model Water Quality Management Plan (WQMP) for County of Orange, Orange County Flood Control District, and the Incorporated Cities of Orange County, Draft February 2003. Ventura Countywide Technical Guidance Manual fo1r Stormwat er Quality Control Measures, July 2002. 4 of 4 Californ ia Stormwater BMP Handbook New Development and Redevelopment www .cabmphandb-ooks.com January 2003 PA2019-098 Drain Inserts Description Drain inserts are manufactured filters or fabiric placed in a drop inlet to remove sediment and debris. There are a multitude of inserts of various shapes and configurations, typically falling into one of three different groups: socks, boxes, and trays. The sock consis ts of a fabric, us ually constructed of polypropylene. The fabric may be attached to a frame or the grat,e of the inlet holds the sock. Socks are meant for vertical (drop) inlets. Boxes are constrncted of plastic or wire mesh. Typically a polypropylene "bag" is placed in the wire mesh box. The bag takes the form of the box. Most box products are one box; that is, the setting area and filtration through media occur in the same box. Some products consist of one or more trays or mesh grates. The trays may hold different types of media. Filtrationi media vary b y manufacturer. Types include polypropylene,. porous polymer, treated cellulose, and activated carbon. California Experience The number of installations is unknown but llikely exceeds a thousand. Some u sers have reported that these systems require considerable maintenance to prevent plugging and bypass. Advantages ■ Does not require additional space as inserts as the drain inlets are already a component of the standard drainage systems. ■ Easy access for inspection and maintenance. ■ As there is no standing water, there is little concern for mos quito breeding. ■ A relatively inexpensive retrofit option. Limitations Performance is likely significantly less than treatment systems that are located at the end of the drainage system s uch as ponds and vaults. Usually not suitable for large areas or areas with trash or leaves than can plug the insert. Design and Sizing Guidelines Refer to manufacturer's guidelines. Drain inserts come any many configurations but can be placed into three general groups: socks, boxes, and trays. The sock consists of a fabric, usually constructed of polypropylene. The fabric may be attached to a frame or the grate of the inlet holds the sock. Socks are meant for vertical (drop) inlets. Boxes are constructed of plastic or wire mesh. Typically a polypropylene "bag" is placed in the wire mesh box. The bag takes the form of the box. Most box products are January 2003 California Stormwater BMP Handbook New Development and Redevelopment www .cabrnpha ndbooks.com MP-52 Design Considerations ■ Use with other BMPs ■ Fil and Sea l Capacity within Inlet Targeted Constituents 0 Sediment 0 Nutrients 0 Trash 0 Metals Bacteria 0 Oi l and Grease 0 Organics Removal Effectiveness See New Development and Redevelopment Handbook-Section 5. CA LIFQK!\.I A ST()RM\\'A rF:R I I I 1 of 3 PA2019-098 MP-52 Drain Inserts one box; that is, the setting area and filtration through media occurs in the s ame box. One manufacturer h as a double-box. Stormwater enters the first box where setting occurs. The stormwater flows into the second box where the filter media is located. Some products c onsist of one or more trays or mesh grates. The trays can btold different types of media. Filtra tion media vary with the manufacturer: types include pollypropylene, porous polymer, treated cellulose, a nd activated carbon. Construction/Inspection Considerations Be certain that ins tallation is d on e in a manner that makes certain that the s tormwater enters the unit and does not leak around the p erimeter. Leakage between the frame of the insert and the fra me of the drain inlet can easily occur with vertical (drop) inlets . Performance Few products have performance data collected under field conditions. Siting Criteria It is recommended that inserts b e used only for retrofit s ituations or as pretreatment where other treatment BMPs presented in this section area u sed. Additional Design Guidelines Follow guidelines provided b y individual manufacturers. Maintenance Likely require frequent maintenance, on the order of several times per year. Cost ■ The initial cost of individual inserts ranges from less than $100 to about $2 ,000. The cost of u s ing multiple units in curb inlet drains varies with the size of the inlet. ■ The low cost of inserts may tend to favor the use of these systems over other, more effective treatment BMPs . However, the low c os t of each unit may b e offset by the number of units that are required, more frequent maintenance, and the shorter structural life ( and there fore replacement). References and Sources of Additional Information Hrachovec, R., and G. Minton, 2001, Field testing of a sock-type cat ch b asin insert, Planet CPR, Seattle, Washington Interagency Catch Basin Insert Committee, Evalu ation of Commercially-Available Catch Basin Inserts for the Treatment of Stormwater Runoff from Developed Sites, 1995 Larry Walker Associates, June 1998, NDMP Inlet/In-Line Control Measure Study Repo1t Manufacturers literature Santa Monica (City), Santa Monica Bay Municipal Sitormwater/Urban Runoff Project - Evalua tion of Potential Catch bas in Retrofits, Woodward Clyde, September 24, 1998 2 of 3 Californ ia Stormwater BMP Handbook New Development and Redevelopment www .cabmphandb-ooks.com January 2003 PA2019-098 Drain Inserts MP-52 Woodward Clyde, June 11, 1996, Parking Lot Monitoring Report, Santa Clara Valley Nonpoint Source Pollution Control Program. January 2003 Californ ia Stormwater BMP Handbook New Development and Redeve lopment www .cabrnpha ndbooks.com 3 of 3 PA2019-098 Water Quality Management Plan (WQMP) Newport Beach Fire Station No. 2 Attachment A - BIO-7 Sizing PA2019-098 STANDARD DETAIL STORMWATER BIOFILTRATION SYSTEM MWS-L-4-8-V PLAN VIEW ELEVATION VIEW RIGHT END VIEW LEFT END VIEW GENERAL NOTES INSTALLATION NOTES SITE SPECIFIC DATA PROJECT NUMBER PROJECT NAME PROJECT LOCATION STRUCTURE ID TREATMENT REQUIRED VOLUME BASED (CF) FLOW BASED (CFS) N/A PEAK BYPASS REQUIRED {CFS} -IF APPLICABLE PIPE DATA I.£ MATERIAL DIAMETER INLET PIPE 1 INLET PIPE 2 OUTLET PIPE PRETREATMENT BIOFILTRA TION DISCHARGE RIM ELEVATION SURFACE LOAD FRAME & COVER 36" X 36" N/A NOTES: 1. CONTRACTOR TO PROVIDE ALL LABOR, EQUIPMENT, MATERIALS AND INCIDENTALS REQUIRED TO OFFLOAD AND INSTALL THE SYSTEM AND APPURTENANCES IN ACCORDANCE WITH THIS DRAWING AND THE MANUFACTURERS SPECIFICATIONS, UNLESS OTHERWISE STATED IN MANUFACTURERS CONTRACT. 2. UNIT MUST BE INSTALLED ON LEVEL BAS£ MANUFACTURER RECOMMENDS A MINIMUM 6" LEVEL ROCK BASE UNLESS SPECIFIED BY THE PROJECT ENGINEER. CONTRACTOR IS RESPONSIBLE TO VERIFY PROJECT ENGINEERS RECOMMENDED BASE SPECIF/CATIONS. 4. CONTRACTOR TO SUPPLY AND INSTALL ALL EXTERNAL CONNECTING PIPES. ALL PIPES MUST BE FLUSH WITH INSIDE SURFACE OF CONCRETE {PIPES CANNOT INTRUDE BEYOND FLUSH}. INVERT OF OUTFLOW PIPE MUST BE FLUSH WITH DISCHARGE CHAMBER FLOOR. ALL PIPES SHALL BE SEALED WATER TIGHT PER MANUFACTURERS STANDARD CONNECTION DETAIL. 5. CONTRACTOR RESPONSIBLE FOR INSTALLATION OF ALL RISERS, MANHOLES, AND HATCHES. CONTRACTOR TO GROUT ALL MANHOLES AND HATCHES TO MATCH FINISHED SURFACE UNLESS SPECIFIED OTHERWISE 6. VEGETATION SUPPLIED AND INSTALLED BY OTHERS. ALL UNITS WITH VEGETATION MUST HAVE DRIP OR SPRAY IRRIGATION SUPPLIED AND INSTALLED BY OTHERS. 7. CONTRACTOR RESPONSIBLE FOR CONTACTING BIO CLEAN FOR ACTIVATION OF UNIT. MANUFACTURERS WARRANTY IS VOID WITH OUT PROPER ACTIVATION BY A BIO CLEAN REPRESENTATIVE 1. MANUFACTURER TO PROVIDE ALL MATERIALS UNLESS OTHERWISE NOTED. 2. ALL DIMENSIONS, ELEVATIONS, SPECIFICATIONS AND CAPACITIES ARE SUBJECT TO CHANG£ FOR PROJECT SPECIFIC DRAWINGS DETAILING EXACT DIMENSIONS, WEIGHTS AND ACCESSORIES PLEASE CONTACT BIO CLEAN. PATENTED PERIMETER VOID AREA DRAIN DOWN LINE IE IN INLET PIPE SEE NOTES C/L VERTICAL UNDERDRAIN MANIFOLD RIM/FG FLOW CONTROL RISER IE OUT 6"_J L4'-o"_J L6" . ~5'-0" ~ . PROPRIETARY AND CONFIDENTIAL: t<J ' " 0 D U \_ ,A R ~ETLANDS THE INFORMATION CONTAINED IN THIS OOCUUENT IS THE SOLE PROPERTY OF FORTERRA AND fTS COUPANIES. THIS OOCUUENT, ::: :a 'fI. =-~~ ~4~_:: OF' NOR ANY PART THEREOF, AW BE USED, REPRODUCED OR l,l(){)IF/ED 7.0f,JlB; 4JIU614' REJJ,TED FrJREJGN P111fNTS OR IN ANY /JANNER WITH O1/T THE WRITTEN CONSENT OF FORTERRA. OTHER 1'111fNTS Pf1IJ/l/6 TREATMENT FLOW (CFS) OPERATING HEAD {FT) PRETREATMENT LOADING RATE (GPM/SF) WETLAND MEDIA LOADING RATE {GPM/SF} Bio ~Clean AForterra PA2019-098 5/31/2016 MWS Linear Sizing Options Model# Dimensions WetlandMEDIA Surface Area Treatment Flow Rate (cfs) MWS-L-4-4 4'x4' 23 sq. ft . 0.052 MWS-L-4-6 4'x 6' 32 sq. ft . 0.073 MWS-L-4-8 4'x 8' 50 sq. ft . 0.115 MWS-L-4-13 4'x 13' 63 sq. ft . 0.144 MWS-L-4-15 4'x 15' 76 sq. ft. 0.175 MWS-L-4-17 4'x 17' 90 sq. ft . 0.206 MWS-L-4-19 4'x 19' 103 sq . ft. 0.237 MWS-L-4-21 4'x 21' 117 sq. ft. 0.268 MWS-L-6-8 7' X 9' 64 sq. ft. 0.147 MWS-L-8-8 8'x 8' 100 sq . ft . 0.230 MWS -L-8-12 8'x 12' 151 sq . ft. 0.346 MWS-L-8-16 8'x 16' 201 sq. ft. 0.462 MWS-L-8-20 9'x 21' 252 sq . ft. 0.577 MWS -L-8-24 9'x25' 302 sq . ft . 0.693 http://www .modularwetlands .com/mws-linear-sizing-options/ 1/1 PA2019-098 TECHNICAL GUIDANCE DOCUMENT APPENDICES III-13 May 19, 2011 Figure III.4. Capture Efficiency Nomograph for Off-line Flow-based Systems in Orange County 100% - 90% ~ 0 C: 80% (l) 0 :E 70% w (l) I... 60% :::, +-' a. ~ 50% u ~ :::, 40% C: C: <{ 30% (l) 0) ~ I... 20% (l) > <{ 10% .----. ~ ~ ~ = - l..---'"'" __,.,.,. ~ ~ ::..--, -- ~ V ~ ~ :::::-~-~ / _,,,,,. ~~ ~ v::: V"' ,J / VA ~ ,, , / ,, h {: II' ,' , , -Tc >= 60 minutes ~ I ,' - ~, ~Tc= 30 minutes I IA rl ',' ~Tc= 20 minutes - ,, ~Tc= 10 minutes 6 6 - j ,, I ,, , -Tc <= 5 minutes ~ ~,., -,, ----Extrapolated Data I 0% I I I I I I I 0 .00 0 .05 0.10 0 .15 0 .20 0 .25 0 .30 0.35 0.40 Design Intensity, in/hr PA2019-098 MWS Linear Advanced Stormwater Biofiltration MODULAR WETLANDS™ PA2019-098 Contents 1 Introduction 2 Applications 3 Configurations 4 Advantages 5 Operation 6 Orientations | Bypass 7 Performance | Approvals 8 Sizing 9 Installation | Maintenance | Plants PA2019-098 www.ModularWetlands.com The Urban Impact For hundreds of years natural wetlands surrounding our shores have played an integral role as nature’s stormwater treatment system. But as our cities grow and develop, these natural wetlands have perished under countless roads, rooftops, and parking lots. Plant A Wetland Without natural wetlands our cities are deprived of water purification, flood control, and land stability. Modular Wetlands and the MWS Linear re-establish nature’s presence and rejuvenate water ways in urban areas. MWS Linear The Modular Wetland System Linear represents a pioneering breakthrough in stormwater technology as the only biofiltration system to utilize patented horizontal flow, allowing for a smaller footprint and higher treatment capacity. While most biofilters use little or no pre- treatment, the MWS Linear incorporates an advanced pre-treatment chamber that includes separation and pre-filter cartridges. In this chamber sediment and hydrocarbons are removed from runoff before it enters the biofiltration chamber, in turn reducing maintenance costs and improving performance. PA2019-098 Parking Lots Parking lots are designed to maximize space and the MWS Linear’s 4 ft. standard planter width allows for easy integration into parking lot islands and other landscape medians. Mixed Use The MWS Linear can be installed as a raised planter to treat runoff from rooftops or patios, making it perfect for sustainable “live-work” spaces. Industrial Many states enforce strict regulations for discharges from industrial sites. The MWS Linear has helped various sites meet difficult EPA mandated effluent limits for dissolved metals and other pollutants. Residential Low to high density developments can benefit from the versatile design of the MWS Linear. The system can be used in both decentralized LID design and cost-effective end-of-the-line configurations. Streets Street applications can be challenging due to limited space. The MWS Linear is very adaptable, and offers the smallest footprint to work around the constraints of existing utilities on retrofit projects. Commercial Compared to bioretention systems, the MWS Linear can treat far more area in less space - meeting treatment and volume control requirements. Applications The MWS Linear has been successfully used on numerous new construction and retrofit projects. The system’s superior versatility makes it beneficial for a wide range of stormwater and waste water applications - treating rooftops, streetscapes, parking lots, and industrial sites. More applications are available on our website: www.ModularWetlands.com/Applications • Agriculture • Reuse • Low Impact Development • Waste Water PA2019-098 www.ModularWetlands.com | Page 3 Configurations The MWS Linear is the preferred biofiltration system of Civil Engineers across the country due to its versatile design. 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 stormdrain design. Curb Type The Curb Type configuration accepts sheet flow through a curb opening and is commonly used along road ways and parking lots. It can be used in sump or flow by conditions. Length of curb opening varies based on model and size. Grate Type The Grate Type configuration offers the same features and benefits as the Curb Type but with a grated/drop inlet above the systems pre-treatment chamber. It has the added benefit of allowing for pedestrian access over the inlet. ADA compliant grates are available to assure easy and safe access. The Grate Type can also be used in scenarios where runoff needs to be intercepted on both sides of landscape islands. Downspout Type The Downspout Type is a variation of the Vault Type and is designed to accept a vertical downspout pipe from roof top 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. Vault Type The system’s patented horizontal flow biofilter is able to accept inflow pipes directly into the pre-treatment chamber, meaning the MWS Linear can be used in end-of-the-line installations. This greatly improves feasibility over typical decentralized designs that are required with other biofiltration/bioretention systems. 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. PA2019-098 Cartridge Housing Pre-filter Cartridge Curb Inlet Individual Media Filters Advantages & Operation The MWS Linear is the most efficient and versatile biofiltration system on the market, and the only system with horizontal flow which improves performance, reduces footprint, and minimizes maintenance. Figure-1 and Figure-2 illustrate the invaluable benefits of horizontal flow and the multiple treatment stages. • Horizontal Flow Biofiltration • Greater Filter Surface Area • Pre-Treatment Chamber • Patented Perimeter Void Area • Flow Control • No Depressed Planter Area Separation • Trash, sediment, and debris are separated before entering the pre-filter cartridges • Designed for easy maintenance access Pre-Filter Cartridges • Over 25 ft2 of surface area per cartridge • Utilizes BioMediaGREEN filter material • Removes over 80% of TSS & 90% of hydrocarbons • Prevents pollutants that cause clogging from migrating to the biofiltration chamber Pre-Treatment1 1 2 Drain-Down Line 1 2Vertical Underdrain Manifold Featured Advantages 0 GioMedio GREEN I M tlond MEDIA PA2019-098 www.ModularWetlands.com | Page 5 Fig. 1 Horizontal Flow • Less clogging than downward flow biofilters • Water flow is subsurface • Improves biological filtration Patented Perimeter Void Area • Vertically extends void area between the walls and the WetlandMEDIA on all four sides. • Maximizes surface area of the media for higher treatment capacity WetlandMEDIA • Contains no organics and removes phosphorus • Greater surface area and 48% void space • Maximum evapotranspiration • High ion exchange capacity and light weight Flow Control • Orifice plate controls flow of water through WetlandMEDIA to a level lower than the media’s capacity. • Extends the life of the media and improves performance Drain-Down Filter • The Drain-Down is an optional feature that completely drains the pre-treatment chamber • Water that drains from the pre-treatment chamber between storm events will be treated 2x to 3x More Surface Area Than Traditional Downward Flow Bioretention Systems.Fig. 2 - Top View Biofiltration2 Discharge3 Perimeter Voi d A r e a 3 4 3Flow Control Riser Drain-Down Line Outlet Pipe I PA2019-098 Orientations Bypass Internal Bypass Weir (Side-by-Side Only) The Side-By-Side orientation places the pre- treatment and discharge chambers adjacent to one another allowing for integration of internal bypass. The wall between these chambers can act as a bypass weir when flows exceed the system’s treatment capacity, thus allowing bypass from the pre-treatment chamber directly to the discharge chamber. External Diversion Weir Structure This traditional offline diversion method can be used with the MWS Linear in scenarios where runoff is being piped to the system. These simple and effective structures are generally configured with two outflow pipes. The first is a smaller pipe on the upstream side of the diversion weir - to divert low flows over to the MWS Linear for treatment. The second is the main pipe that receives water once the system has exceeded treatment capacity and water flows over the weir. Flow By Design This method is one in which the system is placed just upstream of a standard curb or grate inlet to intercept the first flush. Higher flows simply pass by the MWS Linear and into the standard inlet downstream. End-To-End The End-To-End orientation places the pre-treatment and discharge chambers on opposite ends of the biofiltration chamber therefore minimizing the width of the system to 5 ft (outside dimension). This orientation is perfect for linear projects and street retrofits where existing utilities and sidewalks limit the amount of space available for installation. One limitation of this orientation is bypass must be external. Side-By-Side The Side-By-Side orientation places the pre- treatment and discharge chamber adjacent to one another with the biofiltration chamber running parallel on either side. This minimizes the system length, providing a highly compact footprint. It has been proven useful in situations such as streets with directly adjacent sidewalks, as half of the system can be placed under that sidewalk. This orientation also offers internal bypass options as discussed below. This simple yet innovative diversion trough can be installed in existing or new curb and grate inlets to divert the first flush to the MWS Linear via pipe. It works similar to a rain gutter and is installed just below the opening into the inlet. It captures the low flows and channels them over to a connecting pipe exiting out the wall of the inlet and leading to the MWS Linear. The DVERT is perfect for retrofit and green street applications that allows the MWS Linear to be installed anywhere space is available. DVERT Low Flow Diversion DVERT Trough . ,, . . ' " ,., ~ PA2019-098 www.ModularWetlands.com | Page 7 Rhode Island DEM Approved Approved as an authorized BMP and noted to achieve the following minimum removal efficiencies: 85% TSS, 60% Pathogens, 30% Total Phosphorus, and 30% Total Nitrogen. MASTEP Evaluation The University of Massachusetts at Amherst – Water Resources Research Center, issued a technical evaluation report noting removal rates up to 84% TSS, 70% Total Phosphorus, 68.5% Total Zinc, and more. Maryland Department Of The Environment Approved Granted ESD (Environmental Site Design) status for new construction, redevelopment and retrofitting when designed in accordance with the Design Manual. Washington State TAPE Approved The MWS Linear is approved for General Use Level Designation (GULD) for Basic, Enhanced, and Phosphorus treatment at 1 gpm/ft2 loading rate. The highest performing BMP on the market for all main pollutant categories. Approvals The MWS Linear has successfully met years of challenging technical reviews and testing from some of the most prestigious and demanding agencies in the nation, and perhaps the world. DEQ Assignment The Virginia Department of Environmental Quality assigned the MWS Linear, the highest phosphorus removal rating for manufactured treatment devices to meet the new Virginia Stormwater Management Program (VSMP) Technical Criteria. VA TSS Total Phosphorus Ortho Phosphorus Nitrogen Dissolved Zinc Dissolved Copper Total Zinc Total Copper Motor Oil 85%64%67%45%66%38%69%50%95% Performance The MWS Linear continues to outperform other treatment methods with superior pollutant removal for TSS, heavy metals, nutrients, hydrocarbons and bacteria. Since 2007 the MWS Linear has been field tested on numerous sites across the country. With it’s advanced pre-treatment chamber and innovative horizontal flow biofilter, the system is able to effectively remove pollutants through a combination of physical, chemical, and biological filtration processes. With the same biological processes found in natural wetlands, the MWS Linear harnesses natures ability to process, transform, and remove even the most harmful pollutants. PA2019-098 Treatment Flow Sizing Table Model #Dimensions WetlandMedia Surface Area Treatment Flow Rate (cfs) MWS-L-4-4 4’ x 4’23 ft2 0.052 MWS-L-4-6 4’ x 6’32 ft2 0.073 MWS-L-4-8 4’ x 8’50 ft2 0.115 MWS-L-4-13 4’ x 13’63 ft2 0.144 MWS-L-4-15 4’ x 15’76 ft2 0.175 MWS-L-4-17 4’ x 17’90 ft2 0.206 MWS-L-4-19 4’ x 19’103 ft2 0.237 MWS-L-4-21 4’ x 21’117 ft2 0.268 MWS-L-8-8 8’ x 8’100 ft2 0.230 MWS-L-8-12 8’ x 12’151 ft2 0.346 MWS-L-8-16 8’ x 16’201 ft2 0.462 Flow Based Sizing The MWS Linear can be used in stand alone applications to meet treatment flow requirements. Since the MWS Linear is the only biofiltration system that can accept inflow pipes several feet below the surface it can be used not only in decentralized design applications but also as a large central end-of-the-line application for maximum feasibility. Volume Based Sizing Many states require treatment of a water quality volume and do not offer the option of flow based design. The MWS Linear and its unique horizontal flow makes it the only biofilter that can be used in volume based design installed downstream of ponds, detention basins, and underground storage systems. Treatment Volume Sizing Table Model #Treatment Capacity (cu. ft.) @ 24-Hour Drain Down Treatment Capacity (cu. ft.) @ 48-Hour Drain Down MWS-L-4-4 1140 2280 MWS-L-4-6 1600 3200 MWS-L-4-8 2518 5036 MWS-L-4-13 3131 6261 MWS-L-4-15 3811 7623 MWS-L-4-17 4492 8984 MWS-L-4-19 5172 10345 MWS-L-4-21 5853 11706 MWS-L-8-8 5036 10072 MWS-L-8-12 7554 15109 MWS-L-8-16 10073 20145 PA2019-098 www.ModularWetlands.com | Page 9 Installation The MWS Linear is simple, easy to install, and has a space efficient design that offers lower excavation and installation costs compared to traditional tree-box type systems. The structure of the system resembles pre- cast catch basin or utility vaults and is installed in a similar fashion. The system is delivered fully assembled for quick installation. Generally, the structure can be unloaded and set in place in 15 minutes. Our experienced team of field technicians are available to supervise installations and provide technical support. Plant Selection Abundant plants, trees, and grasses bring value and an aesthetic benefit to any urban setting, but those in the MWS Linear do even more - they increase pollutant removal. What’s not seen, but very important, is that below grade the stormwater runoff/flow is being subjected to nature’s secret weapon: a dynamic physical, chemical, and biological process working to break down and remove non-point source pollutants. The flow rate is controlled in the MWS Linear, giving the plants more “contact time” so that pollutants are more successfully decomposed, volatilized and incorporated into the biomass of The MWS Linear’s micro/macro flora and fauna. A wide range of plants are suitable for use in the MWS Linear, but selections vary by location and climate. View suitable plants by selecting the list relative to your project location’s hardy zone. Please visit www.ModularWetlands.com/Plants for more information and various plant lists. Maintenance Reduce your maintenance costs, man hours, and materials with the MWS Linear. Unlike other biofiltration systems that provide no pre-treatment, the MWS Linear is a self-contained treatment train which incorporates simple and effective pre-treatment. Maintenance requirements for the biofilter itself are almost completely eliminated, as the pre-treatment chamber removes and isolates trash, sediments, and hydrocarbons. What’s left is the simple maintenance of an easily accessible pre-treatment chamber that can be cleaned by hand or with a standard vac truck. Only periodic replacement of low-cost media in the pre-filter cartridges is required for long term operation and there is absolutely no need to replace expensive biofiltration media. PA2019-098 © Modular Wetland Systems, Inc. www.ModularWetlands.com | (855) 5MOD-WET | info@ModularWetlands.com PA2019-098 Water Quality Management Plan (WQMP) Newport Beach Fire Station No. 2 Attachment B - Operations and Maintenance Plan PA2019-098 Water Quality Management Plan (WQMP) Newport Beach Fire Station No. 2 Operations and Maintenance (O&M) Plan For Project Name: Newport Beach Fire Station No. 2 Prepared for: City of Newport Beach – Public Works Department 100 Civic Center Drive Newport Beach, CA 92660 949-644-3330 The City of Newport Beach is the owner and operator of the facility and thus will be responsible for all aspects of stormwater controls for the project, including: operation, maintenance, and financial. The responsible party for the project within the municipality shall be designated below, who will be the contact for inspections, changes to the O&M Plan, and problems such as clogged storm drains is: Owner: Title Company City of Newport Beach Address 100 Civic Center Drive, Newport Beach, CA 92660 Email Telephone # PA2019-098 Water Quality Management Plan (WQMP) Newport Beach Fire Station No. 2 BMP Inspection/Maintenance BMP Reponsible Party(s) Inspection/ Maintenance Activities Required Minimum Frequency of Activities N1 Education for Property Owners City of Newport Beach Provide materials to new employees and annual refresher to existing employees. Annually N3 Common Area Landscape Management City of Newport Beach Inspect vegetation annually. Monthly N11 Common Area Litter Control City of Newport Beach Maintain a litter-free common area and provide a sufficient number of litter receptacles for the facility. The City will implement a schedule for the proper removal of the litter receptacles for the purposes of keeping the site free of loose litter or overfilled receptacles. Continuous N14 Common Area Catch Basin Inspection City of Newport Beach Maintain and inspect the onsite drain boxes. The minimum requirements for inspection will be before and after the rainy season (Nov.-Mar.) each year. The drain boxes are required to remain clear and shall be cleaned whenever an inspection reports that a catch basin is more than 25% clogged. Before and after rainy season N15 Seeping of Parking Lot City of Newport Beach Provide sweeping and cleaning for its parking areas as needed. Hosing down the parking lot and patios is prohibited. No runoff is allowed to drain into the drain box inlets. Monthly, as needed S1 Storm Drain Signage City of Newport Beach Stencilling shall be inspected annually and repaired at anytime the stencilling is deemed illegible. Annually PA2019-098 Water Quality Management Plan (WQMP) Newport Beach Fire Station No. 2 S3 Trash storage areas City of Newport Beach Inspect the trash storage areas for the integrity of the designed trash enclosure a minimum of once per year Annually S4 Efficient Irrigation Systems City of Newport Beach Inspect sprinkler system monthly to prevent overspray. Monthly Modular Wetlands City of Newport Beach Per attached manufacturer’s recommendations. Remove trash from screening device. Remove sediment from sedimentation chamber. Replace cartridge filter media. Trim vegetation Every 6 months. PA2019-098 Water Quality Management Plan (WQMP) Newport Beach Fire Station No. 2 CITY OF NEWPORT BEACH Today’s Date: Name of Person Performing Activity (Printed): Signature: BMP Name (As Shown in O&M Plan) Brief Description of Implementation, Maintenance, and Inspection Activity Performed PA2019-098 www.modularwetlands.com Maintenance Guidelines for Modular Wetland System - Linear Maintenance Summary o Remove Trash from Screening Device – average maintenance interval is 6 to 12 months. (5 minute average service time). o Remove Sediment from Separation Chamber – average maintenance interval is 12 to 24 months. (10 minute average service time). o Replace Cartridge Filter Media – average maintenance interval 12 to 24 months. (10-15 minute per cartridge average service time). o Replace Drain Down Filter Media – average maintenance interval is 12 to 24 months. (5 minute average service time). o Trim Vegetation – average maintenance interval is 6 to 12 months. (Service time varies). System Diagram Access to screening device, separation chamber and cartridge filter Access to drain down filter Pre-Treatment Chamber Biofiltration Chamber Discharge Chamber Outflow Pipe Inflow Pipe (optional) MODULAR WETLANDS PA2019-098 www.modularwetlands.com Maintenance Procedures Screening Device 1. Remove grate or manhole cover to gain access to the screening device in the Pre- Treatment Chamber. Vault type units do not have screening device. Maintenance can be performed without entry. 2. Remove all pollutants collected by the screening device. Removal can be done manually or with the use of a vacuum truck. The hose of the vacuum truck will not damage the screening device. 3. Screening device can easily be removed from the Pre-Treatment Chamber to gain access to separation chamber and media filters below. Replace grate or manhole cover when completed. Separation Chamber 1. Perform maintenance procedures of screening device listed above before maintaining the separation chamber. 2. With a pressure washer spray down pollutants accumulated on walls and cartridge filters. 3. Vacuum out Separation Chamber and remove all accumulated pollutants. Replace screening device, grate or manhole cover when completed. Cartridge Filters 1. Perform maintenance procedures on screening device and separation chamber before maintaining cartridge filters. 2. Enter separation chamber. 3. Unscrew the two bolts holding the lid on each cartridge filter and remove lid. 4. Remove each of 4 to 8 media cages holding the media in place. 5. Spray down the cartridge filter to remove any accumulated pollutants. 6. Vacuum out old media and accumulated pollutants. 7. Reinstall media cages and fill with new media from manufacturer or outside supplier. Manufacturer will provide specification of media and sources to purchase. 8. Replace the lid and tighten down bolts. Replace screening device, grate or manhole cover when completed. Drain Down Filter 1. Remove hatch or manhole cover over discharge chamber and enter chamber. 2. Unlock and lift drain down filter housing and remove old media block. Replace with new media block. Lower drain down filter housing and lock into place. 3. Exit chamber and replace hatch or manhole cover. MODULAR WETLANDS PA2019-098 www.modularwetlands.com Maintenance Notes 1. Following maintenance and/or inspection, it is recommended 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 require irrigation. MODULAR WETLANDS PA2019-098 www.modularwetlands.com Maintenance Procedure Illustration Screening Device The screening device is located directly under the manhole or grate over the Pre-Treatment Chamber. It’s mounted directly underneath for easy access and cleaning. Device can be cleaned by hand or with a vacuum truck. Separation Chamber The separation chamber is located directly beneath the screening device. It can be quickly cleaned using a vacuum truck or by hand. A pressure washer is useful to assist in the cleaning process. MODULAP- WETLANDS PA2019-098 www.modularwetlands.com Cartridge Filters The cartridge filters are located in the Pre-Treatment chamber connected to the wall adjacent to the biofiltration chamber. The cartridges have removable tops to access the individual media filters. Once the cartridge is open media can be easily removed and replaced by hand or a vacuum truck. Drain Down Filter The drain down filter is located in the Discharge Chamber. The drain filter unlocks from the wall mount and hinges up. Remove filter block and replace with new block. MODULAR WETLANDS PA2019-098 www.modularwetlands.com Trim Vegetation Vegetation should be maintained in the same manner as surrounding vegetation and trimmed as needed. No fertilizer shall be used on the plants. Irrigation per the recommendation of the manufacturer and or landscape architect. Different types of vegetation requires different amounts of irrigation. MODULAR WETLANDS PA2019-098 www.modularwetlands.com Inspection Form Modular Wetland System, Inc. P. 760.433-7640 F. 760-433-3176 E. Info@modularwetlands.com MODULAR WETLANDS PA2019-098 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 Yes Type of Inspection Routine Follow Up Complaint Storm Office personnel to complete section to the left. 2972 San Luis Rey Road, Oceanside, CA 92058 P (760) 433-7640 F (760) 433-3176 Inspection Report Modular Wetlands System 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 the unit? 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 CLEAN. !NVPRONM(NTAL StltVtCE.$, INC . ---- □ □ □ □ □ □ PA2019-098 www.modularwetlands.com Maintenance Report Modular Wetland System, Inc. P. 760.433-7640 F. 760-433-3176 E. Info@modularwetlands.com ~R W0EfLANDS PA2019-098 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: 2972 San Luis Rey Road, Oceanside, CA 92058 P. 760.433.7640 F. 760.433.3176 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 SystemCLEAN. ~ MODULA R E.NV/RONME.NTAL SE.RV/CE.S , INC. WETLANDS ---- □ □ □ □ □ □ PA2019-098 Water Quality Management Plan (WQMP) Newport Beach Fire Station No. 2 CITY OF NEWPORT BEACH Attachment C - Geotechnical Investigation Report PA2019-098 GEOTECHNICAL INVESTIGATION PROPOSED RETAIL BUILDING 2807 Newport Boulevard Newport Beach, California for 2807 DEV, LLC A California Corporation PA2019-098 Proposed Retail Building – Newport Beach, CA Project No. 16G184-1 Page 5 4.0 SUBSURFACE EXPLORATION 4.1 Scope of Exploration/Sampling Methods The subsurface exploration conducted for this project consisted of three (3) borings advanced to depths of 6± feet to 50± feet below the presently existing site grades. All of the borings were logged during drilling by a member of our staff. The borings were advanced with hollow-stem augers, by a conventional truck-mounted drilling rig. Representative bulk and relatively undisturbed soil samples were taken during drilling. Relatively undisturbed soil samples were taken with a split barrel “California Sampler” containing a series of one inch long, 2.416± inch diameter brass rings. This sampling method is described in ASTM Test Method D-3550. In-situ samples were also taken using a 1.4± inch inside diameter split spoon sampler, in general accordance with ASTM D-1586. Both of these samplers are driven into the ground with successive blows of a 140-pound weight falling 30 inches. The blow counts obtained during driving are recorded for further analysis. Bulk samples were collected in plastic bags to retain their original moisture content. The relatively undisturbed ring samples were placed in molded plastic sleeves that were then sealed and transported to our laboratory. The approximate locations of the borings are indicated on the Boring Location Plan, included as Plate 2 in Appendix A of this report. The Boring Logs, which illustrate the conditions encountered at the boring locations, as well as the results of some of the laboratory testing, are included in Appendix B. 4.2 Geotechnical Conditions Pavements Asphaltic concrete pavements were encountered at the ground surface at Boring Nos. B-1 and B-3. At these boring locations, the pavements consist of 3± inches of asphaltic concrete with 0 to 8± inches of underlying aggregate base. Portland cement concrete pavements were encountered at the ground surface at Boring No. B-2. The pavement section at this boring consists of 4± inches of Portland cement concrete with no discernible layer of underlying aggregate base. Artificial Fill Artificial fill soils were encountered beneath the pavements at Boring Nos. B-1 and B-2 extending to depths of 3 to 4½± feet below the existing site grades. The fill soils generally consist of medium dense silty fine sands. These soils possess a disturbed appearance and occasional artificial debris including nails and metallic fragments resulting in their classification as artificial fill. SOUTHER CALIFORNIA GEOTECH !CAL PA2019-098 Proposed Retail Building – Newport Beach, CA Project No. 16G184-1 Page 6 Alluvium Native alluvium was encountered beneath the artificial fill at Boring Nos. B-1 and B-2, and beneath the pavements at Boring No. B-3. The alluvium generally consists of medium dense fine sands and fine to medium sands with occasional silty sand layers. Occasional loose fine sand and fine to medium sand strata were present in the upper 8± feet. Boring Nos. B-1 and B- 2 were both terminated in a dense fine to medium sand stratum encountered at depths of 42 to 47± feet, extending to the maximum depth explored of 50± feet. Groundwater Free water was encountered at a depth of 7± feet at Boring Nos. B-1 and B-2, and at a depth of 5½± feet at Boring No. B-3. Based on the water level measurements and the moisture contents of the recovered soil samples, the static groundwater table is considered to have existed at a depth between 5½ and 7± feet below the existing site grades at the time of the subsurface investigation. As part of our research, we reviewed available groundwater data in order to determine the historic high groundwater level for the site. The primary reference used to determine the historic groundwater depths in this area is CGS Open File Report 97-08, the Seismic Hazard Evaluation of the Newport Beach Quadrangle which indicates that the historic high groundwater level for the site was 3 feet below the ground surface. SOUTHER CALIFORNIA GEOTECH !CAL PA2019-098 1 5 4 8 4 8 30 18 18 14 18 19 14 15 21 19 3± inches Asphalitic concrete, 8± inches Aggregate base FILL: Red Brown to Dark Gray Brown Silty fine Sand, trace coarse Sand, trace Metallic debris (Nails, etc) mottled, medium dense-moist ALLUVIUM: Dark Gray Clayey fine to medium Sand, trace Shell fragments, medium dense-moist Brown fine to medium Sand, some Shell fragments, loose to medium dense-wet @ 7 feet, Water encountered during drilling Brown fine to medium Sand, trace Shell fragments, trace to little Silt, medium dense-wet 114 101 106 104 11 15 16 14 22 18 36 21 19 JOB NO.: 16G184 PROJECT: Proposed Retail Building LOCATION: Newport Beach, California BORING NO. B-1 PLATE B-1a DRILLING DATE: 8/11/16 DRILLING METHOD: Hollow Stem Auger LOGGED BY: Anthony Luna FIELD RESULTS LABORATORY RESULTS COMMENTSSURFACE ELEVATION: --- MSL WATER DEPTH: 7 feet CAVE DEPTH: 12 feet READING TAKEN: At Completion 5 10 15 20 25 30 GRAPHIC LOGPASSING#200 SIEVE (%)TEST BORING LOG DESCRIPTION POCKET PEN.(TSF)UNCONFINEDSHEAR (TSF)DRY DENSITY(PCF)DEPTH (FEET)MOISTURECONTENT (%)LIQUIDLIMITPLASTICLIMITSAMPLEBLOW COUNTTBL 16G184.GPJ SOCALGEO.GDT 9/8/16~ '-----' E ~ '-- E -E -IX [X - I~ _(g [X ~ :.:·.« . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SOUTHER CALIFOR IA GEOJECHNICAL A Califor,1111 G1qti•r,1II, u PA2019-098 5 7 6 21 25 35 Brown fine to medium Sand, trace Shell fragments, trace to little Silt, medium dense-wet @ 48½ to 50' dense Boring Terminated at 50' 17 17 19 JOB NO.: 16G184 PROJECT: Proposed Retail Building LOCATION: Newport Beach, California BORING NO. B-1 PLATE B-1b DRILLING DATE: 8/11/16 DRILLING METHOD: Hollow Stem Auger LOGGED BY: Anthony Luna FIELD RESULTS LABORATORY RESULTS COMMENTS(Continued) WATER DEPTH: 7 feet CAVE DEPTH: 12 feet READING TAKEN: At Completion 40 45 50 GRAPHIC LOGPASSING#200 SIEVE (%)TEST BORING LOG DESCRIPTION POCKET PEN.(TSF)UNCONFINEDSHEAR (TSF)DRY DENSITY(PCF)DEPTH (FEET)MOISTURECONTENT (%)LIQUIDLIMITPLASTICLIMITSAMPLEBLOW COUNTTBL 16G184.GPJ SOCALGEO.GDT 9/8/16IX :•:T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . SOUTHER CALIFOR IA GEOJECHNICAL A Califor,1111 G1qti•r,1II, u PA2019-098 7 4 3 2 4 6 2 12 25 19 10 19 14 18 14 25 4± inches Portland cement concrete, no discernible Aggregate base FILL: Brown Silty fine Sand, trace medium to coarse Sand, trace Clay, medium dense-damp ALLUVIUM: Dark Gray Silty fine Sand, trace to little Shell fragments, trace medium Sand, medium dense-moist to very moist Dark Gray Brown fine Sand, little Silt, little to some Shell fragments, medium dense-very moist to wet @ 7 feet, Water encountered during drilling Dark Gray Brown fine Sand, trace medium Sand, medium dense-wet Dark Gray Brown to Brown fine to medium Sand, trace Shell fragments, medium dense-wet @ 28½ to 30 feet, trace Silt EI = 14 @ 0 to 5'12 12 19 28 22 17 17 24 19 17 JOB NO.: 16G184 PROJECT: Proposed Retail Building LOCATION: Newport Beach, California BORING NO. B-2 PLATE B-2a DRILLING DATE: 8/11/16 DRILLING METHOD: Hollow Stem Auger LOGGED BY: Anthony Luna FIELD RESULTS LABORATORY RESULTS COMMENTSSURFACE ELEVATION: --- MSL WATER DEPTH: 7 feet CAVE DEPTH: 11 feet READING TAKEN: At Completion 5 10 15 20 25 30 GRAPHIC LOGPASSING#200 SIEVE (%)TEST BORING LOG DESCRIPTION POCKET PEN.(TSF)UNCONFINEDSHEAR (TSF)DRY DENSITY(PCF)DEPTH (FEET)MOISTURECONTENT (%)LIQUIDLIMITPLASTICLIMITSAMPLEBLOW COUNTTBL 16G184.GPJ SOCALGEO.GDT 9/8/16x -~ X _._:•.· -:.-... . ··: ·. ·.- .. :-:- .· ·.· . . · .· -:-. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ♦ ♦ ♦ ♦ ... ♦ ♦ ♦ ♦ ... ♦ ♦ ♦ ♦ ... ♦ ♦ ♦ ♦ ... ♦ ♦ ♦ ♦ ... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ·.·.·.· ·.·.·.· ·.·.·.· ....... . . . . . . . . . . . . . . ·.·.·.· ♦ ♦ ♦ ♦ ... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ·.·.·.· ·.·.·.· ·.·.·.· Ill ·.·.·.· ·.·.·.· .... . . . . . . . . . . SOUTHER CALI FOR IA GEOTECHNICAL A Califor,1111 G1qti•r,1II, u r PA2019-098 4 4 17 41 34 Dark Gray Brown to Brown fine to medium Sand, trace Shell fragments, medium dense-wet Dark Gray fine Sand, little medium Sand, trace Shell fragments, medium dense-wet Dark Gray fine to medium Sand, trace Shell fragments, dense-wet Boring Terminated at 50' 21 21 JOB NO.: 16G184 PROJECT: Proposed Retail Building LOCATION: Newport Beach, California BORING NO. B-2 PLATE B-2b DRILLING DATE: 8/11/16 DRILLING METHOD: Hollow Stem Auger LOGGED BY: Anthony Luna FIELD RESULTS LABORATORY RESULTS COMMENTS(Continued) WATER DEPTH: 7 feet CAVE DEPTH: 11 feet READING TAKEN: At Completion 40 45 50 GRAPHIC LOGPASSING#200 SIEVE (%)TEST BORING LOG DESCRIPTION POCKET PEN.(TSF)UNCONFINEDSHEAR (TSF)DRY DENSITY(PCF)DEPTH (FEET)MOISTURECONTENT (%)LIQUIDLIMITPLASTICLIMITSAMPLEBLOW COUNTTBL 16G184.GPJ SOCALGEO.GDT 9/8/16IX .... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ~-:: -- -:- ----....... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ♦ ♦ ♦ ♦ ... ♦ ♦ ♦ ♦ ... ♦ ♦ ♦ ♦ ... ♦ ♦ ♦ ♦ ... . . . . ... . . . . . . . ·.·.·.· ....... . . .. . .. . SOUTHER CALIFOR IA GEOJECHNICAL A Califor,1111 G1qti•r,1II, u PA2019-098 2 3 15 8 7 3± inches Asphalitic concrete, no discernible Aggregate base ALLUVIUM: Light Brown fine Sand, medium dense-damp Dark Gray Brown Sand, trace to little Silt, slight Organic odor, loose-very moist to wet Dark Gray fine to medium Sand, trace to little Silt, loose-wet @ 5½ feet, Water encountered during drilling Boring Terminated at 6' 2 19 28 JOB NO.: 16G184 PROJECT: Proposed Retail Building LOCATION: Newport Beach, California BORING NO. B-3 PLATE B-3 DRILLING DATE: 8/11/16 DRILLING METHOD: Hollow Stem Auger LOGGED BY: Anthony Luna FIELD RESULTS LABORATORY RESULTS COMMENTSSURFACE ELEVATION: --- MSL WATER DEPTH: 5.5 feet CAVE DEPTH: 4 feet READING TAKEN: At Completion 5 GRAPHIC LOGPASSING#200 SIEVE (%)TEST BORING LOG DESCRIPTION POCKET PEN.(TSF)UNCONFINEDSHEAR (TSF)DRY DENSITY(PCF)DEPTH (FEET)MOISTURECONTENT (%)LIQUIDLIMITPLASTICLIMITSAMPLEBLOW COUNTTBL 16G184.GPJ SOCALGEO.GDT 9/8/16-:- .··.· •.·. 1·.-· .•• . . . . . . SOUTHER CALIFOR IA GEOJECHNICAL A Califor,1111 G1qti•r,1II, u r PA2019-098