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HomeMy WebLinkAboutPA2022-0290_20221227_WQMP Dated 12-21-22Water Quality Management Plan (WQMP) City of Newport Beach / Santa Ana Region Priority Project 604 Via Lido Nord, Newport Beach Prepared for: Paul Antepara 604 Via Lido Nord Newport Beach, CA 92663 Dated: December 21, 2022 Prepared by: CivilScapes Engineering, Inc. Engineer: Civil Registration No. 76698 28052 Camino Capistrano, Suite 213 Laguna Niguel, CA 92677 (949) 464-8115 will@civilscapes.com Water Quality Management Plan (WQMP) Owner’s Certification Project Owner’s Certification Permit/Application No. # TBD Grading Permit No. # TBD Tract/Parcel Map No. Lot 70, 28/25-36 M.M. Building Permit No. # TBD CUP, SUP, and/or APN (Specify Lot Numbers if Portions of Tract) APN 423-231-02 This Water Quality Management Plan (WQMP) has been prepared for the homeowner by CivilScapes Engineering Incorporated. 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: Paul Antepara Title Owner Company Paul Antepara Address 604 Via Lido Nord, Newport Beach 92625 Email Telephone # Signature Date Chase & Katherine Sanderson 22060.WQMP.docx Contents Page No. Section I Discretionary Permit(s) and Water Quality Conditions ................................ 3 Section II Project Description ..................................................................................... 5 Section III Site Description ........................................................................................ 9 Section IV Best Management Practices (BMPs) ........................................................ 14 Section V Inspection/Maintenance Responsibility for BMPs ..................................... 31 Section VI Site Plan and Drainage Plan .................................................................... 32 Section VII Educational Materials ............................................................................. 33 Attachments Educational Materials and Fact Sheets Water Quality Management Plan (WQMP) 6104 W Oceanfront Chase & Katherine Sanderson Section I 22060.WQMP.docx Page 3 Section I Discretionary Permit(s) and Water Quality Conditions Provide discretionary permit and water quality information. Refer to Section 2.1 in the Technical Guidance Document (TGD) available from the Orange County Stormwater Program (ocwatersheds.com). Project Infomation Permit/Application No. # TBD Tract /Parcel Map No. Lot 70, 28/25-36 M.M. Additional Information/ Comments: APN 423-231-02 Water Quality Conditions Water Quality Conditions (list verbatim) No conditions of approval have been issued at this time. Water Quality Management Plan (WQMP) 6104 W Oceanfront Chase & Katherine Sanderson Section I 22060.WQMP.docx Page 4 Watershed-Based Plan Conditions Provide applicable conditions from watershed - based plans including WIHMPs and TMDLS. TMDLs for Newport Bay include sediments, nutrients, toxics, and fecal coliform Water Quality Management Plan (WQMP) 6104 W Oceanfront Chase & Katherine Sanderson Section II 22060.WQMP.docx Page 5 Section II Project Description II.1 Project Description Provide a detailed project description including: • Project areas; Land uses; Land cover; Design elements; A general description not broken down by drainage management areas (DMAs). Include attributes relevant to determining applicable source controls. Refer to Section 2.2 in the TGD for information that must be included in the project description. Description of Proposed Project Development Category (Verbatim from WQMP): Priority Project Categories: 1. Detached Residential Development Project Area (ft2): 3,150 Number of Dwelling Units: One single- family unit SIC Code: N/A - Residential Narrative Project Description: The property is approximately 3,150 square feet. The project proposes to demolish the existing residence and construct a new single family residence. Project Area Pervious Impervious Area (acres or sq ft) Percentage Area (acres or sq ft) Percentage Pre-Project Conditions 242 8% 2,908 92% Post-Project Conditions 101 3% 3,049 97% Drainage Patterns/Connections Storm water is collected by area drains, then infiltration systems. Overflows are pumped to the street. Water Quality Management Plan (WQMP) 6104 W Oceanfront Chase & Katherine Sanderson Section II 22060.WQMP.docx Page 6 II.2 Potential Stormwater Pollutants Determine and list expected stormwater pollutants based on land uses and site activities. Refer to Section 2.2.2 and Table 2.1 in the TGD for guidance. Pollutants of Concern Pollutant Circle One: E=Expected to be of concern N=Not Expected to be of concern Additional Information and Comments Suspended-Solid/ Sediment E Expected. The major source of sediments is bare or poorly vegetated ground. Wind and water have the potential to introduce sediments in stormwater runoff Nutrients E Expected. Nutrients are generally associated with poor landscaping practices, leaks from sanitary systems, and animal wastes. Heavy Metals N Not Expected. Pathogens (Bacteria/Virus) E Expected. Sources of pathogens include wild bird and pet waste, garbage, and leaky sanitary systems. Pesticides E Expected. Excessive application of pesticides may result in runoff containing toxic levels of its active ingredient. Oil and Grease E Expected. Oil & grease are usually associated with leaking vehicles in the driveways. Toxic Organic Compounds N Not Expected. Trash and Debris E Expected. The major source for trash & debris in stormwater is poorly managed trash containers. Water Quality Management Plan (WQMP) 6104 W Oceanfront Chase & Katherine Sanderson Section II 22060.WQMP.docx Page 7 II.3 Hydrologic Conditions of Concern Determine if streams located downstream from the project area are determined to be potentially susceptible to hydromodification impacts. Refer to Section 2.2.3.1 in the TGD for NOC or Section 2.2.3.2 for <SOC>. No – Show map Yes – Describe applicable hydrologic conditions of concern below. Refer to Section 2.2.3 in the TGD. See map below taken from County Figure 4 from the Technical Guidance Document (blue area indicates potential areas of erosion, habitat & physical structure susceptibility): Water Quality Management Plan (WQMP) 6104 W Oceanfront Chase & Katherine Sanderson Section II 22060.WQMP.docx Page 8 II.4 Post Development Drainage Characteristics Describe post development drainage characteristics. Refer to Section 2.2.4 in the TGD. Rooftops will drain to downspouts connecting to private on-site storm drain system. Planter areas and hardscape areas will be collected by area drains connecting to same on-site storm drain system. The drains will collect in underground infiltration systems to retain the design capture volume of runoff. II.5 Property Ownership/Management Describe property ownership/management. Refer to Section 2.2.5 in the TGD. PAUL ANTEPARA is the current owner of the property and will be responsible for maintenance of BMPs and WQMP requirements. Upon sale of property maintenance of BMP and WQMP will be the responsibility of the new owner. PAUL ANTEPARA shall provide this WQMP to new owner upon sale. Water Quality Management Plan (WQMP) 6104 W Oceanfront Chase & Katherine Sanderson Section III 22060.WQMP.docx Page 9 Section III Site Description III.1 Physical Setting Fill out table with relevant information. Refer to Section 2.3.1 in the TGD. Planning Area/ Community Name Newport Beach Location/Address 604 Via Lido Nord, Newport Beach APN 423-231-02 Land Use Residential Zoning R-1 Single-Unit Residential Acreage 0.07 acres Predominant Soil Type Sandy Water Quality Management Plan (WQMP) 6104 W Oceanfront Chase & Katherine Sanderson Section III 22060.WQMP.docx Page 10 III.2 Site Characteristics Fill out table with relevant information and include information regarding BMP sizing, suitability, and feasibility, as applicable. Refer to Section 2.3.2 in the TGD. Precipitation Zone 24-hr, 85th percentile Rainfall, d = 0.66 inches Topography Relatively Flat Property Drainage Patterns/Connectio ns Existing and Proposed drains outlet to street Soil Type, Geology, and Infiltration Properties Sandy Water Quality Management Plan (WQMP) 6104 W Oceanfront Chase & Katherine Sanderson Section III 22060.WQMP.docx Page 11 Site Characteristics (continued) Hydrogeologic (Groundwater) Conditions Borings are not available at this time Geotechnical Conditions (relevant to infiltration) Sandy Off-Site Drainage There is no drainage onto the site from offsite areas. The project does not propose to drain across property lines. Utility and Infrastructure Information All drainage systems shall be privately maintained Water Quality Management Plan (WQMP) 6104 W Oceanfront Chase & Katherine Sanderson Section III 22060.WQMP.docx Page 12 III.3 Watershed Description Fill out table with relevant information and include information regarding BMP sizing, suitability, and feasibility, as applicable. Refer to Section 2.3.3 in the TGD. Receiving Waters Existing storm drain outlets into Lower Newport Bay 2014/2016 303(d) Listed Impairments Lower Newport Bay: Chlordane, Copper, DDT, Indicator Bacteria, Nutrients, PCBs, and S Toxicity Applicable TMDLs Newport Bay: Sediment, Nutrients, Toxics and Fecal Coliform Pollutants of Concern for the Project Suspended-Solid/ Sediment, Nutrients, Pathogens (Bacteria/Virus), Pesticides, Oil and Grease, Trash and Debris Water Quality Management Plan (WQMP) 6104 W Oceanfront Chase & Katherine Sanderson Section III 22060.WQMP.docx Page 13 Environmentally Sensitive and Special Biological Significant Areas The project is located more than 200 feet buffer from impaired water-bodies. See map below. Water Quality Management Plan (WQMP) 6104 W Oceanfront Chase & Katherine Sanderson Section IV 22060.WQMP.docx Page 14 Section IV Best Management Practices (BMPs) IV. 1 Project Performance Criteria Describe project performance criteria. Several steps must be followed in order to determine what performance criteria will apply to a project. These steps include: • If the project has an approved WIHMP or equivalent, then any watershed specific criteria must be used and the project can evaluate participation in the approved regional or sub- regional opportunities. The local Permittee planning or NPDES staff should be consulted regarding the existence of an approved WIHMP or equivalent. • Determine applicable hydromodification control performance criteria. Refer to Section 7.II- 2.4.2.2 of the Model WQMP. • Determine applicable LID performance criteria. Refer to Section 7.II-2.4.3 of the Model WQMP. • Determine applicable treatment control BMP performance criteria. Refer to Section 7.II-3.2.2 of the Model WQMP. • Calculate the LID design storm capture volume for the project. Refer to Section 7.II-2.4.3 of the Model WQMP. (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. A Model WIHMP for Newport Bay-Newport Coast has not been approved by the Regional Water Quality Control Board at this time. Water Quality Management Plan (WQMP) 6104 W Oceanfront Chase & Katherine Sanderson Section IV 22060.WQMP.docx Page 15 Project Performance Criteria (continued) If HCOC exists, list applicable hydromodification control performance criteria (Section 7.II-2.4.2.2 in MWQMP) There are no HCOCs List applicable LID performance criteria (Section 7.II-2.4.3 from MWQMP) The projected proposes to properly design on-site biotreatment systems, since infiltration, harvest and use, and evapotranspiration cannot be feasibly implemented. The performance criteria for LID for this project is as follows: Infiltrate, harvest and use, evapotranspire, or biofilter the 85th percentile, 24- hour storm event (design capture volume) List applicable treatment control BMP performance criteria (Section 7.II-3.2.2 from MWQMP) Performance criteria is met with LID. See above. Calculate LID design storm capture volume for Project. 𝐶𝑐𝑟𝑖𝑐𝑙 𝐶𝑎𝑙𝑟𝑟𝑟𝑐 𝑉𝑙𝑙𝑟𝑙𝑐,𝐶𝐶𝑉=𝐶 𝑤 𝑐 𝑤 𝐴 𝑤 43560 𝑟𝑐/𝑎𝑐 𝑤1 12𝑖𝑙/𝑐𝑟 Where: V = runoff volume during the design storm event, cu-ft C = runoff coefficient = (0.75 × imp + 0.15) imp = impervious fraction of drainage area (ranges from 0 to 1) d = storm depth (inches) A = tributary area to BMPs (acres) 𝑆𝑐𝑐 𝐶𝑎𝑙𝑐𝑟 𝑙𝑙 𝐹𝑙𝑙𝑙𝑙𝑤𝑖𝑙𝑐 𝑃𝑎𝑐𝑐𝑟 Worksheet B: Simple Design Capture Volume Sizing Method (Subarea A-1) 1 Enter design capture storm depth from Figure III.1, d (inches)d=0.66 inches 2 Enter the effect of provided HSCs, dHSC (inches) (Worksheet A)dHSC=0 inches 3 Calculate the remainder of the design capture storm depth, dremainder (inches) (Line 1 - Line 2) dremainder=0.66 inches 1 Enter Project area tributary to BMP (s), A (acres)A=0.0723 acres 2 Enter Project Imperviousness, imp (unitless)imp=0.9679 3 Calculate runoff coefficient, C= (0.75 x imp) + 0.15 C=0.876 4 Calculate runoff volume, V design= (C x d remainder x A x 43560 x (1/12))Vdesign=151.8 cu-ft 1 Enter the measured infiltration rate, Kobserved1 (in/hr)Kobserved =6.0 in/hr 2 Enter combined safety factor from Worksheet H, Stotal (unitless) Stotal = 4.5 3 Calculate design infiltration rate, Kdesign = Kobserved / Stotal Kdesign = 1.333 in/hr 4 Enter drawdown time, T (max 48 hours) TROUTING=48 hours 5 Calculate max retention depth that can be drawn down within the drawdown time (feet), Dmax = Kdesign x T x (1/12) Dmax = 5.33 feet 6 Depth of Infiltration Facitility, Dprovided < Dmax Dprovided 3.00 feet 7 Calculate minimum area required for BMP (sq-ft), Amin = Vdesign/ dPROVIDED Amin 50.59 sq-ft 1Kobserved is the vertical infiltration measured in the field, before applying a factor of safety. If field testing measures a rate that is different than the vertical infiltration rate (for example, three-dimensional borehole percolation rate), then this rate must be adjusted by an acceptable method (for example, Porchet method) to yield the field estimate of vertical infiltration rate, Kobserved. See Appendix VII. Step 1a: Determine the design capture storm depth used for calculating volume Step 1b: Calculate the DCV Step 3b: Determine minimum BMP footprint Step 3: Design BMPs to ensure full retention of the DCV Step 3a: Determine design infiltration rate Water Quality Management Plan (WQMP) 6104 W Oceanfront Chase & Katherine Sanderson Section IV 22060.WQMP.docx Page 16 IV.2. SITE DESIGN AND DRAINAGE PLAN Describe site design and drainage plan including • A narrative of site design practices utilized or rationale for not using practices; • A narrative of how site is designed to allow BMPs to be incorporated to the MEP • A table of DMA characteristics and list of LID BMPs proposed in each DMA. • Reference to the WQMP plot plan. • Calculation of Design Capture Volume (DCV) for each drainage area. • A listing of GIS coordinates for LID and Treatment Control BMPs (unless not required by local jurisdiction). Refer to Section 2.4.2 in the TGD. Minimizing a development’s effects on water quality and the environment can be most effectively achieved by using a combination of BMPs which include Low Impact Development (LID) Site Design, Source Control and Treatment Control measures. These design and control measures employ a multi-level strategy. The strategy consists of: 1) reducing or eliminating post-project runoff; 2) controlling sources of pollutants; and 3) treating storm water runoff before discharging it to the storm drain system or to receiving waters. The most effective means of avoiding or reducing water quality and hydrologic impacts is through incorporation of measures into the project design. These measures should be taken into consideration early in the planning of a project as they can affect the overall design of a project. LID BMPs are intended to collectively minimize directly connected impervious areas, limit loss of existing infiltration capacity, and protect areas that provide important water quality benefits necessary to maintain riparian and aquatic biota, and/or are particularly susceptible to erosion and sediment loss, as feasible. The design of the proposed project has incorporated site design concepts as described below. Draught tolerant plants will be employed in conformance with the city’s development code and water conservation ordinances. The site will also disconnect impervious surfaces. The rooftops will drain to swales prior to out letting to street. Water Quality Management Plan (WQMP) 6104 W Oceanfront Chase & Katherine Sanderson Section IV 22060.WQMP.docx Page 17 IV.3 LID BMP SELECTION AND PROJECT CONFORMANCE ANALYSIS Each sub-section below documents that the proposed design features conform to the applicable project performance criteria via check boxes, tables, calculations, narratives, and/or references to worksheets. Refer to Section 2.4.2.3 in the TGD for selecting LID BMPs and Section 2.4.3 in the TGD for conducting conformance analysis with project performance criteria. IV.3.1 Hydrologic Source Controls If required HSCs are included, fill out applicable check box forms. If the retention criteria are otherwise met with other LID BMPs, include a statement indicating HSCs not required. 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: No Hydrologic Source Controls are implemented for this project. Water Quality Management Plan (WQMP) 6104 W Oceanfront Chase & Katherine Sanderson Section IV 22060.WQMP.docx Page 18 IV.3.2 Infiltration BMPs Identify infiltration BMPs to be used in project. If design volume cannot be met state why BMPs cannot be met 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: Show calculations below to demonstrate if the LID Design Strom Capture Volume can be met with infiltration BMPs. If not document how much can be met with infiltration and document why it is not feasible to meet the full volume with infiltration BMPs. Three infiltration trenches (French Drains) are proposed. Water Quality Management Plan (WQMP) 6104 W Oceanfront Chase & Katherine Sanderson Section IV 22060.WQMP.docx Page 19 IV.3.3 Evapotranspiration, Rainwater Harvesting BMPs If the full Design Storm Capture Volume cannot be met with infiltration BMPs, describe any 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: Other: Other: Show calculations below to demonstrate if the LID Design Strom Capture Volume can be met with evapotranspiration, rainwater harvesting BMPs in combination with infiltration BMPs. If not document how much can be met with either infiltration BMPs, evapotranspiration, rainwater harvesting BMPs, or a combination, and document why it is not feasible to meet the full volume with either of these BMPs categories. Infiltration BMPs are higher category on BMP hierarch. No Harvesting BMPs are employed. Water Quality Management Plan (WQMP) 6104 W Oceanfront Chase & Katherine Sanderson Section IV 22060.WQMP.docx Page 20 IV.3.4 Biotreatment BMPs If the full Design Storm Capture Volume cannot be met with infiltration BMPs, and/or evapotranspiration and rainwater harvesting BMPs, describe biotreatment BMPs. Include sections for selection, suitability, sizing, and infeasibility, as applicable. 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 Other: Other: Show calculations below to demonstrate if the LID Design Strom Capture Volume can be met with infiltration, evapotranspiration, rainwater harvesting and/or biotreatment BMPs. If not document how much can be met with either infiltration BMPs, evapotranspiration, rainwater harvesting BMPs, or a combination, and document why it is not feasible to meet the full volume with either of these BMPs categories. Infiltration BMPs are higher category on BMP hierarch. No Biotreatment BMPs are employed. Water Quality Management Plan (WQMP) 6104 W Oceanfront Chase & Katherine Sanderson Section IV 22060.WQMP.docx Page 21 IV.3.5 Hydromodification Control BMPs Describe hydromodification control BMPs. See Section 5 TGD. Include sections for selection, suitability, sizing, and infeasibility, as applicable. Detail compliance with Prior Conditions of Approval. Hydromodification Control BMPs BMP Name BMP Description Not Applicable IV.3.6 Regional/Sub-Regional LID BMPs Describe regional/sub-regional LID BMPs in which the project will participate. Refer to Section 7.II- 2.4.3.2 of the Model WQMP. Water Quality Management Plan (WQMP) 6104 W Oceanfront Chase & Katherine Sanderson Section IV 22060.WQMP.docx Page 22 Regional/Sub-Regional LID BMPs Not Applicable IV.3.7 Treatment Control BMPs Treatment control BMPs can only be considered if the project conformance analysis indicates that it is not feasible to retain the full design capture volume with LID BMPs. Describe treatment control BMPs including sections for selection, sizing, and infeasibility, as applicable. Treatment Control BMPs BMP Name BMP Description Water Quality Management Plan (WQMP) 6104 W Oceanfront Chase & Katherine Sanderson Section IV 22060.WQMP.docx Page 23 IV.3.8 Non-structural Source Control BMPs Fill out non-structural source control check box forms or provide a brief narrative explaining if non- structural source controls were not used. 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) N/A. No hazardous waste N6 Local Industrial Permit Compliance N/A. IGP does not apply to this SIC code N7 Spill Contingency Plan N/A. Materials are stored indoors N8 Underground Storage Tank Compliance N/A. No record of USTs onsite N9 Hazardous Materials Disclosure Compliance N/A. No hazardous waste N10 Uniform Fire Code Implementation N11 Common Area Litter Control N12 Employee Training N13 Housekeeping of Loading Docks N/A. No loading docks N14 Common Area Catch Basin Inspection N15 Street Sweeping Private Streets and Parking Lots N16 Retail Gasoline Outlets N/A. No retail gas outlets Water Quality Management Plan (WQMP) 6104 W Oceanfront Chase & Katherine Sanderson Section IV 22060.WQMP.docx Page 24 N1 Education for Property Owners, Tenants and Occupants: Practical informational materials are provided to residents, occupants, or tenants to increase the public’s understanding of stormwater quality, sources of pollutants, and what they can do to reduce pollutants in stormwater. The Owner will be educated on general housekeeping practices that contribute to the protection of stormwater quality. See Attachment ‘A’ in this WQMP for educational materials. N2 Activity Restrictions: Per the city’s municipal code no person shall construct or maintain an illicit connection. Illicit discharges are not allowed. N3 Common Area Landscape Management: Specific practices are followed and ongoing maintenance is conducted to minimize erosion and over-irrigation, conserve water, and reduce pesticide and fertilizer applications. The Owner will be responsible for ongoing landscape maintenance of the project consistent with the City’s Water-Efficient Landscaping Code, Chapter 14.17 of NBMC and County BMP Fact Sheet IC7. Both of these references are included in Attachment ‘A’. N4 BMP Maintenance: In order to ensure adequate and comprehensive BMP implementation, all responsible parties are identified for implementing all non-structural BMPs and for structural BMPs, cleaning, inspection, and other maintenance activities are specified including responsible parties for conducting such activities. The Owner will be responsible for implementation of each non-structural BMP and scheduled cleaning of all structural BMP facilities in perpetuity or until ownership is transferred. Prior to transfer of ownership, the Transfer of Responsibility Form must be submitted and approved by the City. N10 Uniform Fire Code Implementation: If the project includes a hazardous material storage facility or other area regulated by Article 80 and therefore implements measures to comply with this section of the Uniform Fire Code. The project will comply with the Uniform Fire Code. N11 Common Area Litter Control: Trash management and litter control procedures are specified, including responsible parties, and implemented to reduce pollution of drainage water. The Owner will be responsible for litter patrol and emptying of trash receptacles and pet waste weekly and as needed. N12 Contractor/Employee Training: Practical informational materials and/or training are provided to contractors to increase their understanding of stormwater quality, sources of pollutants, and their responsibility for reducing pollutants in stormwater. Water Quality Management Plan (WQMP) 6104 W Oceanfront Chase & Katherine Sanderson Section IV 22060.WQMP.docx Page 25 The Owner will be responsible for educating contractors on general housekeeping practices that contribute to the protection of stormwater quality. Educational materials are included in Appendix A of this report. Educational materials will be provided to contractors at the time of hiring. N14 Drainage Facility Inspection: Inspection procedures, schedules, and responsibilities are established for drainage facilities to ensure regular cleaning, inspection, and maintenance. The Owner will be responsible for having the catch basins inspected and cleaned prior to the storm season, October 1st of each year and as needed. N15 Street Sweeping Private Streets and Parking Lots: Driveways shall be swept using “dry sweeping” (i.e. mechanical, vacuuming) and will be conducted to reduce pollution of drainage water. The Owner will be responsible for having driveways swept immediately prior to the storm season, October 1st of each year and as needed. Water Quality Management Plan (WQMP) 6104 W Oceanfront Chase & Katherine Sanderson Section IV 22060.WQMP.docx Page 26 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 No catch basins on-site S2 Design and construct outdoor material storage areas to reduce pollution introduction No outdoor material storage areas 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 Incorporate requirements applicable to individual priority project categories (from SDRWQCB NPDES Permit) S6 Dock areas N/A S7 Maintenance bays N/A S8 Vehicle wash areas N/A S9 Outdoor processing areas N/A S10 Equipment wash areas N/A S11 Fueling areas N/A S12 Hillside landscaping N/A S13 Wash water control for food preparation areas N/A S14 Community car wash racks N/A Water Quality Management Plan (WQMP) 6104 W Oceanfront Chase & Katherine Sanderson Section IV 22060.WQMP.docx Page 27 S3 Design and construct outdoor material storage areas to reduce pollution introduction: The trash area will be inspected in conjunction with Litter Control (N11) on a weekly basis. The area will be inspected for loose debris and to make sure bins are closed. S4 Use efficient irrigation systems & landscape design, water conservation, smart controllers, and source control: The project must comply with City’s landscape ordinance. The Owner will be responsible for ongoing landscape maintenance of the project consistent with the City’s Water- Efficient Landscaping Code, Chapter 14.17 of NBMC and County BMP Fact Sheet IC7. Both of these references are included in Attachment ‘A’. S5 Protect slopes and channels and provide energy dissipation: The project will maintain drainage channels and provide splash blocks where roof drains outlet to grade. See project plans for more information. Water Quality Management Plan (WQMP) 6104 W Oceanfront Chase & Katherine Sanderson Section IV 22060.WQMP.docx Page 28 IV.4 ALTERNATIVE COMPLIANCE PLAN (IF APPLICABLE) IV.4.1 Water Quality Credits Determine if water quality credits are applicable for the project. Refer to Section 3.1 of the Model WQMP for description of credits and Appendix VI of the TGD for calculation methods for applying water quality credits. 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) Water Quality Management Plan (WQMP) 6104 W Oceanfront Chase & Katherine Sanderson Section IV 22060.WQMP.docx Page 29 IV.4.2 Alternative Compliance Plan Information Describe an alternative compliance plan (if applicable). Include alternative compliance obligations (i.e., gallons, pounds) and describe proposed alternative compliance measures. Refer to Section 7.II 3.0 in the WQMP. Not Applicable Water Quality Management Plan (WQMP) 6104 W Oceanfront Chase & Katherine Sanderson Section V 22056.WQMP.docx Page 30 Section V Inspection/Maintenance Responsibility for BMPs Fill out information in table below. Prepare and attach an Operation and Maintenance Plan. Identify the mechanism through which BMPs will be maintained. Inspection and maintenance records must be kept for a minimum of five years for inspection by the regulatory agencies. Refer to Section 7.II 4.0 in the Model WQMP. BMP Inspection/Maintenance BMP Reponsible Party(s) Inspection/ Maintenance Activities Required Minimum Frequency of Activities Infiltration Trench Owner Check for standing water. systems shall fully drain within 48 hours. Replace rock as needed. Annually in July/August before each rainy season Water Quality Management Plan (WQMP) 6104 W Oceanfront Chase & Katherine Sanderson Section VII 22060.WQMP.docx Page 31 Inspection and Maintenance of Source Control BMPs Source Control BMP Activity Responsibility Frequency N1. Education for Property Owner’s Tenants and Occupants Distribute appropriate materials to owners, tenants, and/or occupants via contract language, mailings, website, or meetings. Owner Information provided to owners and tenants upon sale or lease. Reminders sent or posted as needed. Check www.ocwatersheds.com and/or City website for updated educational materials. Owner Annually N2. Activity Restrictions Per the city’s municipal code no person shall construct or maintain an illicit connection. Illicit discharges are not allowed. Owner Information provided to owners and tenants upon sale or lease. Reminders sent or posted as needed. N3/S4. Common Area Landscape Management, Efficient Landscape Design, and Efficient Irrigation Check that fertilizer and pesticide usage is in accordance with the Integrated Pest Management Program. Adjust, if needed. Owner Annually Check the irrigation system water budget to ensure efficiency targets are being met and the system is in good condition. Adjust/repair irrigation system and controllers, if needed. Owner Annually prior to irrigation system activation Check landscaping for presence of invasive species and remove, if needed. Owner Annually N11. Common Area Litter Control Remove trash from around trash enclosure, inspect to ensure lids closed, structurally sound, and not overflowing. Repair or replace, as needed. Owner Monthly Inspect common area for litter and trash disposal violations by homeowners and reporting to the HOA or responsible party for investigation. Remove litter, as needed. Owner Weekly Water Quality Management Plan (WQMP) 6104 W Oceanfront Chase & Katherine Sanderson Section VII 22060.WQMP.docx Page 32 Source Control BMP Activity Responsibility Frequency N14. Common Area Catch Basin Inspection N15. Street Sweeping Private Streets and Parking Lots Remove trash and debris from catch basins and grates. Check for damage, clogging, and standing water. Repair or mitigate clogging/standing water, as needed. Owner Four times per year during wet season, including inspection just before the wet season and within 24 hours after at least two storm events >0.5 inches Sweep curb and gutter areas using a vacuum street sweeper. Report any significant or illicit debris in curb/gutter to HOA or responsible party, as needed. Owner Weekly to Monthly S3. Design and Construct Trash and Waste Storage Areas Check that outdoor waste storage structure is consistently covered, that structural stability is sound, and that no run-on or contact of the trash with runoff is occurring. Repair leaks or damage and mitigate if trash coming into contact with stormwater, as needed. Owner Twice per year S5. Protect Slopes and Channels and Provide Energy Dissipation Check slopes, channels, riprap and other conveyance or energy dissipation areas for signs of erosion or scour. Replace material, repair channels, replant vegetation, and/or redesign, as needed for signs of erosion/scour. Owner Four times per year during wet season, including inspection just before the wet season and within 24 hours after at least two storm events >0.5 inches Water Quality Management Plan (WQMP) 6104 W Oceanfront Chase & Katherine Sanderson Section VI 22060.WQMP.docx Page 33 Section VI Site Plan and Drainage Plan VI.1 SITE PLAN AND DRAINAGE PLAN Include a site plan and drainage plan sheet set containing the following minimum information: • Project location • Site boundary • Land uses and land covers, as applicable • Suitability/feasibility constraints • Structural BMP locations • Drainage delineations and flow information • Drainage connections • BMP details Water Quality Management Plan (WQMP) 6104 W Oceanfront Chase & Katherine Sanderson Section VII 22060.WQMP.docx Page 34 Section VII Educational Materials Refer to the Orange County Stormwater Program (ocwatersheds.com) for a library of materials available. For the copy submitted to the Permittee, only attach the educational materials specifically applicable to the project. Other materials specific to the project may be included as well and must be attached. Educational 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 Compliance BMPs for Mobile Businesses Proper Disposal of Household Hazardous Waste Other Material Check If Attached Recycle at Your Local Used Oil Collection Center (North County) Recycle at Your Local Used Oil Collection Center (Central County) IC7. Landscape Maintenance Recycle at Your Local Used Oil Collection Center (South County) R1. Automobile Repair & Maintenance Tips for Maintaining a Septic Tank System R2. Automobile Washing Responsible Pest Control R3. Automobile Parking Sewer Spill R4. Home and Garden Care Activities Tips for the Home Improvement Projects R5. Disposal of Pet Waste Tips for Horse Care R6. Disposal of Green Waste Tips for Landscaping and Gardening R7. Household Hazardous Waste Tips for Pet Care R8. Water Conservation Tips for Projects Using Paint Tips for Residential Pool, Landscape, and Hardscape Drains TECHNICAL GUIDANCE DOCUMENT APPENDICES XIV-24 December 20, 2013 INF-2: Infiltration Trench Fact Sheet An infiltration trench is a long, narrow, rock-filled trench with no outlet other than an overflow outlet. Runoff is stored in the void space between stones and infiltrates through the bottom and sides of the trench. Infiltration trenches provide the majority of their pollutant removal benefits through volume reduction. Pretreatment is important for limiting amounts of coarse sediment entering the trench which can clog and render the trench ineffective. Note: if an infiltration trench is “deeper than its widest surface dimension,” or includes an assemblage of perforated pipes, drain tiles, or other similar mechanisms intended to distribute runoff below the surface of the ground, it would probably be considered a "Class V Injection Well" under the federal Underground Injection Control (UIC) Program, which is regulated in California by U.S. EPA Region 9. A UIC permit may be required for such a facility (for details see http://www.epa.gov/region9/water/groundwater/uic-classv.html). Feasibility Screening Considerations  Infiltration trenches shall pass infeasibility screening criteria to be considered for use  Infiltration trenches, particularly deeper designs, may not provide significant attenuation of stormwater pollutants if underlying soils have high permeability; potential risk of groundwater contamination.  The potential for groundwater mounding should be evaluated if depth to seasonally high groundwater (unmounded) is less than 15 feet. Opportunity Criteria  Soils are adequate for infiltration or can be amended to provide an adequate infiltration rate.  Drainage area area is ≤ 5 acres and has low to moderate sediment production.  2-3 percent of drainage area available for infiltration (generally requires less surface area than infiltration basins and bioretention areas without underdrain).  Space available for pretreatment (biotreatment or treatment control BMP as described below).  Potential for groundwater contamination can be mitigated through isolation of pollutant sources, pretreatment of inflow, and/or demonstration of adequate treatment capacity of underlying soils.  Infiltration is into native soil, or depth of engineered fill is ≤ 5 feet from the bottom of the facility to native material and infiltration into shallow fill is approved by a geotechnical professional.  Tributary area land uses include open areas adjacent to parking lots, driveways, and buildings, and roadway medians and shoulders. OC-Specific Design Criteria and Considerations □ Must comply with local, state, and federal UIC regulations if applicable; a permit may be required. Also known as: French Drains Rock Trenches Exfiltration Trenches Soak-aways Soakage Trenches Infiltration Trench Source: www.dot.ca.gov TECHNICAL GUIDANCE DOCUMENT APPENDICES XIV-25 December 20, 2013 □ Placement of BMPs should observe geotechnical recommendations with respect to geological hazards (e.g. landslides, liquefaction zones, erosion, etc.) and set-backs (e.g., foundations, utilities, roadways, etc.) □ For facilities with tributary area less than 1 acre and less than 3 foot depth, minimum separation to mounded seasonally high groundwater of 5 feet shall be observed. □ For facilities with tributary area greater than 1 acre or deeper than 3 feet, minimum separation to mounded seasonally high groundwater of 10 feet shall be observed. □ Minimum pretreatment should be provided upstream of the infiltration trench, and water bypassing pretreatment should not be directed to the infiltration trench. □ Infiltration trenches should not be used for drainage areas with high sediment production potential unless preceded by full treatment control with a BMP effective for sediment removal. □ Ponded water should not persist within 1 foot of the surface of the facility for longer than 72 hours following the end of a storm event (observation well is needed to allow observation of drain time). □ Energy dissipators should be provided at inlet and outlet to prevent erosion. □ An overflow device must be provided if basin is on-line. □ A minimum freeboard of one foot should be provided above the overflow device (for an on-line basin) or the outlet (for an off-line basin). □ Longitudinal trench slope should not exceed 3%. □ Side slopes above trench fill should not be steeper than 3:1. Simple Sizing Method for Infiltration Trenches If the Simple Design Capture Volume Sizing Method is used to size an infiltration trench, the user calculates the DCV and then designs the geometry required to draw down the DCV in 48 hours. The sizing steps are as follows: Step 1: Determine Infiltration Basin DCV Calculate the DCV using the Simple Design Capture Volume Sizing Method described in Appendix III.3.1. Step 2: Determine the 48-hour Effective Depth The depth of water that can be drawn down in 48 hours can be calculated using the following equation: d48 = KDESIGN × SACF × 48 hours Where: d48 = trench effective 48-hour depth, ft KDESIGN = basin design infiltration rate, in/hr (See Appendix VII) SACF = Surface Area Correction Factor = ranges from 1.0 (sides insignificant or not accounted) to 2.0 (sides plus bottom are 2 times the surface area of the bottom at mid depth) to account for the ratio of infiltration through the sides of the trench to the bottom footprint of the trench; should be based on anticipated trench geometry and wetted surface area at mid-depth. This is the maximum effective depth of the trench below the overflow device to achieve drawdown in 48 hours. TECHNICAL GUIDANCE DOCUMENT APPENDICES XIV-26 December 20, 2013 Step 3: Determine the Trench Ponding Depth and Trench Depth The depth of water stored in the ponding depth (i.e. above the trench fill) and within the trench itself should be equal or less than d48. Determine the ponding depth and the trench fill depth such that: d48 ≥ (nT × dT + dP) Where: d48 = trench effective 48-hour depth, ft (from Step 2) nT = porosity of trench fill; 0.35 may be assumed where other information is not available dT = depth of trench fill, ft dP = ponding depth, ft (should not exceed 1 ft) Step 4: Calculate the Required Infiltrating Area The required footprint area can be calculated using the following equation: A = DCV/ ((nT × dT) + dP) Where: A = required trench footprint area, sq-ft DCV = design capture volume, cu-ft (see Step 1) nT = porosity of trench fill; 0.35 may be assumed where other information is not available dT = depth of trench fill, ft dP = ponding depth, ft Capture Efficiency Method for Infiltration Trenches If BMP geometry has already been defined and deviates from the 48 hour drawdown time, the designer can use the Capture Efficiency Method for Volume-Based, Constant Drawdown BMPs (Appendix III.3.2) to determine the fraction of the DCV that must be provided to manage 80 percent of average annual runoff volume. This method accounts for drawdown time different than 48 hours. Step 1: Determine the drawdown time associated with the selected trench geometry DD = ((nT × dT) + dP) / (KDESIGN × SACF) × 12 Where: DD = time to completely drain infiltration basin ponding depth, hours nT = porosity of trench fill; 0.35 may be assumed where other information is not available dT = depth of trench fill, ft dP = ponding depth, ft SACF = Surface Area Correction Factor = ranges from 1.0 (sides insignificant or not accounted) to 2.0 (sides plus bottom are 2 times the surface area of the bottom at mid depth) to account for the ratio of infiltration through the sides of the trench to the bottom footprint of the trench; should be based on anticipated trench geometry and wetted surface area at mid-depth. KDESIGN = basin design infiltration rate, in/hr (See Appendix VII) Step 2: Determine the Required Adjusted DCV for this Drawdown Time Use the Capture Efficiency Method for Volume-Based, Constant Drawdown BMPs (Appendix III.3.2) to calculate the required fraction of the DCV the basin must hold to achieve 80 percent capture of average annual stormwater runoff volume based on the trench drawdown time calculated above. TECHNICAL GUIDANCE DOCUMENT APPENDICES XIV-27 December 20, 2013 Step 3: Determine the Trench Infiltrating Area Needed The required footprint area can be calculated using the following equation: A = DCV / ( (nT × dT) + dP) Where: A = required trench footprint area, sq-ft DCV = design capture volume, cu-ft (see Step 1) nT = porosity of trench fill; 0.35 may be assumed where other information is not available dT = depth of trench fill, ft dP = ponding depth, ft If the area required is greater than the selected trench area, adjust surface area or adjust ponding and/or trench depth and recalculate required area until the required area is achieved. Configuration for Use in a Treatment Train  Infiltration trenches may be preceeded in a treatment train by HSCs in the drainage area, which would reduce the required volume of the trench.  Infiltration trenches must be preceeded by some form of pretreatment which may be biotreatment or a treatment control BMP; if an approved biotreatment BMP is used as pretreatment, the overflow from the infiltration trench may be considered “biotreated” for the purposes of meeting the LID requirments  The overflow or bypass from an infiltration trench can be routed to a downstream biotreatment BMP and/or a treatment control BMP if additional control is required to achieve LID or treatment control requirements Additional References for Design Guidance  CASQA BMP Handbook for New and Redevelopment: http://www.cabmphandbooks.com/Documents/Development/TC-10.pdf  SMC LID Manual (pp 141): http://www.lowimpactdevelopment.org/guest75/pub/All_Projects/SoCal_LID_Manual/SoCalL ID_Manual_FINAL_040910.pdf  Los Angeles County Stormwater BMP Design and Maintenance Manual, Chapter 6: http://dpw.lacounty.gov/DES/design_manuals/StormwaterBMPDesignandrainage areaintenance.pdf  City of Portland Stormwater Management Manual (Soakage Trenches, page 2-82) http://www.portlandonline.com/bes/index.cfm?c=47954&a=202883  San Diego County LID Handbook Appendix 4 (Factsheet 1): http://www.sdcounty.ca.gov/dplu/docs/LID-Appendices.pdf Chapter 14.17 WATER-EFFICIENT LANDSCAPING Sections: 14.17.005 Purpose. 14.17.010 Definitions. 14.17.020 Applicability. 14.17.030 Landscape Water Use Standards. 14.17.040 Implementation Procedures. * Prior history: Ords. 92-54, 92-55 and 96-22. 14.17.005 Purpose. The purpose of this chapter and the related design standards is to establish an alternative model acceptable under Governor Brown’s April 1, 2015, Drought Executive Order (B-29-15) as being at least as effective as the State Model Water Efficient Landscape Ordinance in the context of conditions in the City to: A. Promote the benefits of consistent landscape ordinances with neighboring local and regional agencies; B. Promote the values and benefits of landscapes while recognizing the need to invest water and other resources as efficiently as possible; C. Establish a structure for planning, designing, installing, and maintaining and managing water- efficient landscapes in new construction and rehabilitated projects; D. Establish provisions for water management practices and water waste prevention for existing landscapes; E. Use water efficiently without waste by setting a maximum applied water allowance as an upper limit for water use and reduce water use to the lowest practical amount; and F. Encourage the use of economic incentives that promote the efficient use of water, such as providing rebate incentives and offering educational programs. (Ord. 2015-34 § 1 (part), 2016: Ord. 2010-1 § 1 (part), 2010) 14.17.010 Definitions. For the purposes of this chapter, the following words and phrases shall have the meanings set forth in this section: A. “Aggregate landscape areas” pertains to the areas undergoing development as one project or for production home neighborhoods or other situations where multiple parcels are undergoing development as one project, but will eventually be individually owned. B. “Applied water” means the portion of water supplied by the irrigation system to the landscape. C. “Budget-based tiered-rate structure” means tiered or block rates for irrigation accounts charged by the retail water agency in which the block definition for each customer is derived from lot size or irrigated area and the evapotranspiration requirements of landscaping. D. “Design standards” refers to the Design Standards for Implementation of the Water Efficient Landscape Ordinance, which are hereby adopted by reference and may be amended from time-to-time, which describe procedures, calculations, and requirements for landscape projects subject to this chapter. E. “Ecological restoration project” means a project where the site is intentionally altered to establish a defined, indigenous, historic ecosystem. F. “Estimated applied water use” or “EAWU” means the average annual total amount of water estimated to be necessary to keep plants in a healthy state. EAWU is based on the reference evapotranspiration rate, the size of the landscape area, plant water use factors, and the irrigation efficiency within each hydrozone. G. “ET adjustment factor” or “ETAF” of 0.55 (fifty-five (55) percent) for residential areas and 0.45 (forty-five (45) percent) for nonresidential areas, that, when applied to reference evapotranspiration, adjusts for plant factors and irrigation efficiency, two major influences upon the amount of water that needs to be applied to the landscape. The ETAF for new and existing (nonrehabilitated) special landscape area shall not exceed 1.0 (one hundred (100) percent). The ETAF for existing nonrehabilitated landscapes is 0.8 (eighty (80) percent). H. “Hardscapes” means any durable material or feature (pervious and nonpervious) installed in or around a landscape area, such as pavements or walls. Surface area of pools and other water features is considered part of the landscape area and not considered hardscape for purposes of this chapter. I. “Irrigation efficiency” means the measurement of the amount of water beneficially used divided by the amount of water applied. Irrigation efficiency is derived from measurements and estimates of irrigation system characteristics and management practices. The minimum average irrigation efficiency for purposes of this chapter is 0.75 (seventy-five (75) percent) for overhead spray devices and 0.81 (eighty-one (81) percent) for drip systems with an overall irrigation efficiency of 0.71 (seventy-one (71) percent). Greater irrigation efficiency can be expected from well designed and maintained systems. J. “Landscape area” means all the planting areas, turf areas, and water features in a landscape design plan subject to the maximum applied water allowance and estimated applied water use calculations. The landscape area does not include footprints of buildings or structures, sidewalks, driveways, parking lots, decks, patios, gravel or stone walks, other pervious or nonpervious hardscapes, and other nonirrigated areas designated for nondevelopment (e.g., open spaces and existing native vegetation). K. “Landscape documentation package” means the documents required to be provided to the City for review and approval of landscape design projects, as described in the design standards. L. “Landscape project” means the total area of landscape in a project, as provided in the definition of “landscape area.” M. “Landscape rehabilitation project” means any relandscaping project that meets the applicability criteria of Section 14.17.020, where the modified landscape area is greater than twenty-five hundred (2,500) square feet. N. “Licensed professional” means a licensed landscape architect, California licensed landscape contractor, civil engineer, architect, or any other person authorized to design or construct a landscape pursuant to Sections 5500.1, 5615, 5641, 5641.1, 5641.2, 5641.3, 5641.4, 5641.5, 5641.6, 6701, and 7027.5 of the California Business and Professions Code, Section 832.27 of Title 16 of the California Code of Regulations, and Section 6721 of the California Food and Agriculture Code, or any successor statutes. O. “Local water supplier” means any entity, including, but not limited to, a public agency, city, county, or private water company that provides retail water service. P. “Maximum applied water allowance” or “MAWA” is the upper limit of annual applied water for the established landscape area as specified in Section 2.2 of the design standards. It is based upon the area’s reference evapotranspiration, the ET adjustment factor, and the size of the landscape area. The estimated applied water use shall not exceed the maximum applied water allowance. MAWA = (ETo) (0.62) [(ETAF x LA) + ((1 - ETAF) x SLA)] Q. “Ministerial permit” means an authorizing document issued by the City’s Community Development Department in conjunction with a landscape project which may include, but is not limited to: grading, pools, spas, fountains, ponds, retaining walls, fences and walls, shade structures, trellis structures, barbecues, outdoor fireplaces, etc. R. “New landscape installation project” means a landscape installed in conjunction with any type of new development, whether or not the new development includes construction of new building(s) (e.g., parks, playgrounds, greenbelts, etc.). S. “Nonpervious” means any surface or natural material that does not allow for the passage of water through the material and into the underlying soil. T. “Pervious” means any surface or material that allows the passage of water through the material and into the underlying soil. U. “Plant factor” or “plant water use factor” is a factor, when multiplied by ETo, which estimates the amount of water needed by plants. For purposes of this chapter, the plant factor range for very low water use plants is zero (0) to 0.1 (ten (10) percent); the plant factor for low water use plants is 0.1 (ten (10) percent) to 0.3 (thirty (30) percent); the plant factor range for moderate water use plants is 0.4 (forty (40) percent) to 0.6 (sixty (60) percent); and the plant factor range for high water use plants is 0.7 (seventy (70) percent) to 1.0 (one hundred (100) percent). Plant factors cited in this chapter are derived from the Department of Water Resources publication “Water Use Classification of Landscape Species.” Plant factors may also be obtained from horticultural researchers from academic institutions or professional associations as approved by the California Department of Water Resources (DWR). V. “Recycled water” or “reclaimed water” means a wastewater which, as a result of treatment, is suitable for nonpotable uses not intended for human consumption such as landscape irrigation and water features. W. “Reference evapotranspiration” or “ETo” means a standard measurement of environmental parameters which affect the water use of plants. ETo is given expressed in inches per day, month, or year as represented in Appendix D of the design standards and is an estimate of the evapotranspiration of a large field of four- to seven-inch-tall, cool-season grass that is well watered. Reference evapotranspiration is used as the basis of determining the maximum applied water allowance. X. “Smart automatic irrigation controller” means an automatic timing device used to remotely control valves that operate an irrigation system and which schedules irrigation events using either evapotranspiration (weather-based) or soil moisture data with nonvolatile memory shall be required for irrigation scheduling in all irrigation systems, recommending U.S. EPA WaterSense labeled devices as applicable. Y. “Special landscape area” or “SLA” means an area of the landscape dedicated solely to edible plants such as orchards and vegetable gardens, areas irrigated with recycled water, water features using recycled water, or areas dedicated to active play such as community pools and spas, parks, sports fields, golf courses, or areas where turf provides a playing surface. These areas may have an ET adjustment factor (ETAF) up to 1.0 (one hundred (100) percent). Z. “Turf” means a ground cover surface of mowed grass. Annual bluegrass, Kentucky bluegrass, perennial ryegrass, red fescue, and tall fescue are cool-season grasses. Bermuda grass, Kikuyu grass, seashore paspalum, St. Augustine grass, zoysia grass, and Buffalo grass are warm-season grasses. AA. “Valve” means a device used to control the flow of water in an irrigation system. BB. “Water feature” means a design element where open water performs an aesthetic or recreational function. Water features include ponds, lakes, waterfalls, fountains, artificial streams, spas, and swimming pools (where water is artificially supplied). The surface area of water features is included in the high water use hydrozone of the landscape area. Constructed wetlands used for on-site wastewater treatment, habitat protection or storm water best management practices that are not irrigated and used solely for water treatment or storm water retention are not water features and, therefore, are not subject to the water budget calculation. (Ord. 2015-34 § 1 (part), 2016: Ord. 2013-11 § 84, 2013; Ord. 2010-1 § 1 (part), 2010) 14.17.020 Applicability. A. Beginning February 1, 2016, and consistent with Executive Order No. B-29-15, this chapter shall apply to the following landscape projects: 1. New landscape projects with an aggregate landscape area equal to or greater than five hundred (500) square feet which require discretionary or ministerial permits from the City. 2. Rehabilitated landscape projects with an aggregate landscape area equal to or greater than twenty- five hundred (2,500) square feet which require discretionary or ministerial permits from the City. 3. New or rehabilitated landscape projects with an aggregate landscape area of twenty-five hundred (2,500) square feet or less may comply with the performance requirements of this chapter or conform to the prescriptive measures contained in Appendix H of the Design Standards (Prescriptive Compliance Option); 4. New or rehabilitated projects using treated or untreated graywater or rainwater captured on site, any lot or parcels within the project that has less than twenty-five hundred (2,500) square feet of landscape area and meets the lot or parcel’s landscape water requirement (estimated total water use) entirely with the treated or untreated graywater or through stored rainwater capture on site is subject only to Appendix H of the Design Standards (Prescriptive Compliance Option); 5. New landscape installation projects or landscape rehabilitation projects installed at cemeteries shall be subject to the following sections of the design standards: Sections 2.2, Water Efficient Landscape Calculations and Alternatives; 2.8, Post-Installation Irrigation Scheduling; and 2.9, Post-Installation Landscape and Irrigation Maintenance, but shall not require a landscape documentation package (Design Standards Section 2.1). B. This chapter does not apply to: 1. Landscape rehabilitation projects that consist of replacement plantings with equal or lower water needs and the irrigation system is designed, operable and programmed to comply with the City’s water conservation regulations; 2. Registered local, State, or Federal historical sites; 3. Ecological restoration projects that do not require a permanent irrigation system; 4. Plant collections, as part of botanical gardens and arboretums open to the public; or 5. Landscape in hazard reduction and fuel modification zones, where applicable. C. Section 14.17.030(B) (requiring compliance with the City’s water conservation ordinance) shall apply to all landscape areas, whether installed prior to (existing landscapes) or after adoption of the ordinance codified in this chapter. (Ord. 2015-34 § 1 (part), 2016: Ord. 2010-1 § 1 (part), 2010) 14.17.030 Landscape Water Use Standards. A. For new landscape installation or rehabilitation projects subject to Section 14.17.020, the estimated applied water use allowed for the landscape area shall not exceed the MAWA calculated using an ET adjustment factor of 0.55 (fifty-five (55) percent) for residential areas and 0.45 (forty-five (45) percent) for nonresidential areas, except for special landscape areas where the MAWA is calculated using an ET adjustment factor of 1.0 (one hundred (100) percent); or the design of the landscape area shall otherwise be shown to be equivalently water efficient in a manner acceptable to the City, as provided in the design standards. B. Irrigation of all landscape areas shall be conducted in a manner conforming to the rules and requirements, and shall be subject to penalties and incentives for water conservation and water waste prevention, as determined and implemented by the City’s water conservation ordinance. (Ord. 2015-34 § 1 (part), 2016: Ord. 2010-1 § 1 (part), 2010) 14.17.040 Implementation Procedures. A. A landscape documentation package shall be submitted to the City for review and approval of all landscape projects subject to the provisions of this chapter. Any landscape documentation package submitted to the City shall comply with the provisions of the design standards. B. The landscape documentation package shall include a certification of design by a professional appropriately licensed in the State of California stating that the landscape design and water use calculations have been prepared by or under the supervision of a licensed professional and are certified to be in compliance with the provisions of this chapter and the design standards. 1. Landscape and irrigation plans shall be submitted to the City for review and approval with appropriate water use calculations. Water use calculations shall be consistent with the procedures and calculations provided in the design standards document. 2. Verification of compliance of the landscape installation with the approved plans shall be obtained through a certification of completion, which shall be submitted to the City prior to final of the permit, per the procedures provided in the design standards document. (Ord. 2015-34 § 1 (part), 2016: Ord. 2010-1 § 1 (part), 2010) IC7. LANDSCAPE MAINTENANCE MINIMUM BEST MANAGEMENT PRACTICES Pollution Prevention/Good Housekeeping • Properly store and dispose of gardening wastes. • Use mulch or other erosion control measures on exposed soils. • Properly manage irrigation and runoff. • Properly store and dispose of chemicals. • Properly manage pesticide and herbicide use. • Properly manage fertilizer use. Stencil storm drains Training • Train employees on these BMPs, storm water discharge prohibitions, and wastewater discharge requirements. • Provide on-going employee training in pollution prevention. Best Management Practices (BMPs) A BMP is a technique, measure or structural control that is used for a given set of conditions to improve the quality of the stormwater runoff in a cost effective manner1. The minimum required BMPs for this activity are outlined in the box to the right. Implementation of pollution prevention/good housekeeping measures may reduce or eliminate the need to implement other more costly or complicated procedures. Proper employee training is key to the success of BMP implementation. The BMPs outlined in this fact sheet target the following pollutants: Targeted Constituents Sediment x Nutrients x Floatable Materials x Metals Bacteria x Oil & Grease Organics & Toxicants Pesticides x Oxygen Demanding x Provided below are specific procedures associated with each of the minimum BMPs along with procedures for additional BMPs that should be considered if this activity takes place at a facility located near a sensitive waterbody. In order to meet the requirements for medium and high priority facilities, the owners/operators must select, install and maintain appropriate BMPs on site. Since the selection of the appropriate BMPs is a site- specific process, the types and numbers of additional BMPs will vary for each facility. 1. Take steps to reduce landscape maintenance requirements. • Where feasible, retain and/or plant native vegetation with features that are determined to be beneficial. Native vegetation usually requires less maintenance than planting new vegetation. • When planting or replanting consider using low water use flowers, trees, shrubs, and groundcovers. • Consider alternative landscaping techniques such as naturescaping and xeriscaping. 2. Properly store and dispose of gardening wastes. • Dispose of grass clippings, leaves, sticks, or other collected vegetation as garbage at a permitted landfill or by composting. • Do not dispose of gardening wastes in streets, waterways, or storm drainage systems. • Place temporarily stockpiled material away from watercourses and storm drain inlets, and berm and/or cover. 3. Use mulch or other erosion control measures on exposed soils. 1 EPA " Preliminary Data Summary of Urban Stormwater Best Management Practices” IC7 Landscape Maintenance 1 4. Properly manage irrigation and runoff. • Irrigate slowly or pulse irrigate so the infiltration rate of the soil is not exceeded. • Inspect irrigation system regularly for leaks and to ensure that excessive runoff is not occurring. • If re-claimed water is used for irrigation, ensure that there is no runoff from the landscaped area(s). • If bailing of muddy water is required (e.g. when repairing a water line leak), do not put it in the storm drain; pour over landscaped areas. • Use automatic timers to minimize runoff. • Use popup sprinkler heads in areas with a lot of activity or where pipes may be broken. Consider the use of mechanisms that reduce water flow to broken sprinkler heads. 5. Properly store and dispose of chemicals. • Implement storage requirements for pesticide products with guidance from the local fire department and/or County Agricultural Commissioner. • Provide secondary containment for chemical storage. • Dispose of empty containers according to the instructions on the container label. • Triple rinse containers and use rinse water as product. 6. Properly manage pesticide and herbicide use. • Follow all federal, state, and local laws and regulations governing the use, storage, and disposal of pesticides and herbicides and training of applicators and pest control advisors. • Follow manufacturers’ recommendations and label directions. • Use pesticides only if there is an actual pest problem (not on a regular preventative schedule). When applicable use less toxic pesticides that will do the job. Avoid use of copper-based pesticides if possible. Use the minimum amount of chemicals needed for the job. • Do not apply pesticides if rain is expected or if wind speeds are above 5 mph. • Do not mix or prepare pesticides for application near storm drains. Prepare the minimum amount of pesticide needed for the job and use the lowest rate that will effectively control the targeted pest. • Whenever possible, use mechanical methods of vegetation removal rather than applying herbicides. Use hand weeding where practical. • Do not apply any chemicals directly to surface waters, unless the application is approved and permitted by the state. Do not spray pesticides within 100 feet of open waters. • Employ techniques to minimize off-target application (e.g. spray drift) of pesticides, including consideration of alternative application techniques. • When conducting mechanical or manual weed control, avoid loosening the soil, which could lead to erosion. • Purchase only the amount of pesticide that you can reasonably use in a given time period. • Careful soil mixing and layering techniques using a topsoil mix or composted organic material can be used as an effective measure to reduce herbicide use and watering. 7. Properly manage fertilizer use. • Follow all federal, state, and local laws and regulations governing the use, storage, and disposal of fertilizers. • Follow manufacturers’ recommendations and label directions. • Employ techniques to minimize off-target application (e.g. spray drift) of fertilizer, including consideration of alternative application techniques. Calibrate fertilizer distributors to avoid excessive application. • Periodically test soils for determining proper fertilizer use. • Fertilizers should be worked into the soil rather than dumped or broadcast onto the surface. • Sweep pavement and sidewalk if fertilizer is spilled on these surfaces before applying irrigation water. • Use slow release fertilizers whenever possible to minimize leaching IC7 Landscape Maintenance 2 8. Incorporate the following integrated pest management techniques where appropriate: • Mulching can be used to prevent weeds where turf is absent. • Remove insects by hand and place in soapy water or vegetable oil. Alternatively, remove insects with water or vacuum them off the plants. • Use species-specific traps (e.g. pheromone-based traps or colored sticky cards). • Sprinkle the ground surface with abrasive diatomaceous earth to prevent infestations by soft-bodied insects and slugs. Slugs also can be trapped in small cups filled with beer that are set in the ground so the slugs can get in easily. • In cases where microscopic parasites, such as bacteria and fungi, are causing damage to plants, the affected plant material can be removed and disposed of (pruning equipment should be disinfected with bleach to prevent spreading the disease organism). • Small mammals and birds can be excluded using fences, netting, and tree trunk guards. • Promote beneficial organisms, such as bats, birds, green lacewings, ladybugs, praying mantis, ground beetles, parasitic nematodes, trichogramma wasps, seedhead weevils, and spiders that prey on detrimental pest species. Training 1. Train employees on these BMPs, storm water discharge prohibitions, and wastewater discharge requirements. 2. Educate and train employees on the use of pesticides and pesticide application techniques. Only employees properly trained to use pesticides can apply them. 3. Train and encourage employees to use integrated pest management techniques. 4. Train employees on proper spill containment and cleanup. • Establish training that provides employees with the proper tools and knowledge to immediately begin cleaning up a spill. • Ensure that employees are familiar with the site’s spill control plan and/or proper spill cleanup procedures. • Fact sheet IC17 discusses Spill Prevention and Control in detail. 5. Establish a regular training schedule, train all new employees, and conduct annual refresher training. 6. Use a training log or similar method to document training. Stencil storm drains Storm drain system signs act as highly visible source controls that are typically stenciled directly adjacent to storm drain inlets. Stencils should read “No Dumping Drains to Ocean”. References California Storm Water Best Management Practice Handbook. Industrial and Commercial. 2003. www.cabmphandbooks.com California Storm Water Best Management Practice Handbooks. Industrial/Commercial Best Management Practice Handbook. Prepared by Camp Dresser& McKee, Larry Walker Associates, Uribe and Associates, Resources Planning Associates for Stormwater Quality Task Force. March 1993. King County Stormwater Pollution Control Manual. Best Management Practices for Businesses. King County Surface Water Management. July 1995. On-line: http://dnr.metrokc.gov/wlr/dss/spcm.htm Stormwater Management Manual for Western Washington. Volume IV Source Control BMPs. Prepared by Washington State Department of Ecology Water Quality Program. Publication No. 99-14. August 2001. IC7 Landscape Maintenance 3 Water Quality Handbook for Nurseries. Oklahoma Cooperative Extension Service. Division of Agricultural Sciences and Natural Resources. Oklahoma State University. E-951. September 1999. For additional information contact: County of Orange/ OC Watersheds Main: (714) 955-0600 24 hr Water Pollution Hotline: 1-877-89-SPILL or visit our website at www.ocwatersheds.com IC7 Landscape Maintenance 4 R-1 AUTOMOBILE REPAIR AND MAINTENANCE Automobile repair and maintenance activities have the potential to contribute directly to storm drain systems primarily through spills or the dumping of waste fluids being conveyed to the storm drain. Automotive fluids, such as oils, greases, and solvents, are hydrocarbon based, and may contain metals, chlorinated hydrocarbons, and other toxic compounds. Removal of caked dirt and grime from an automobile increases the sediment load to the storm drain system. The pollution prevention activities outlined in this fact sheets are used to prevent the discharge of pollutants to the storm drain system. The activities outlined in this fact sheet target the following pollutants: Sediment x Nutrients Bacteria Foaming Agents Metals x Hydrocarbons x Hazardous Materials x Pesticides and Herbicides Other Think before conducting automobile repair and maintenance activities. Remember - The ocean starts at your front door. Required Activities • Recycle used oil and antifreeze by taking them to service stations and other recycling centers. Never pour oil in storm drains or other areas. • Do not perform repair and maintenance activities during rain events. • Immediately clean up and contain any spills. Dispose of all waste and adsorbent materials properly. • Store hazardous materials and wastes (including, but not limited to, fluids, solvents, parts containing fluids, batteries) indoors, under cover, or in watertight containers. • Perform automobile maintenance and repairs over impervious surfaces such as concrete, so spills and waste material should be readily cleaned up. Use drip pans, plastic sheeting, etc. to contain spills and waste material. • Dispose of cleaning solvents at the designated hazardous waste center. Recommended Activities • Conduct auto repair activities at a commercial repair facility • Perform automobile repair and maintenance activities under a covered area. • Do not buy fluids containing target pollutants (e.g. degreasers containing PERC). • Monitor parked or stored vehicles and equipment for leaks and place pans under leaks to collect fluids for proper disposal or recycling. For additional information contact: County of Orange, OC Watershed Main: (714) 955-0600 Water Pollution Discharge Hotline 1-877-89-SPILL or visit our website at: www.ocwatersheds.com R-2 AUTOMOBILE WASHING The activities outlined in this fact sheet target the following pollutants: Sediment x Nutrients X Bacteria Foaming Agents X Metals X Hydrocarbons X Hazardous Materials x Pesticides and Herbicides Other Automobile washing activities have the potential to contribute pollutants because road dust washed from vehicles may contain metals and hydrocarbons. Any leaking fluids washed from the automobile may be carried to the storm drain by the wash water. Detergents used for automobile washing may also contain phosphorus and foaming agents, which contribute to the eutrophication of receiving waterbodies. The pollution prevention activities outlined in this fact sheets are used to prevent the discharge of pollutants to the storm drain system. Think before conducting automobile washing activities. Remember - The ocean starts at your front door. Required Activities • Shake floor mats into trashcan or vacuum to clean. Do not shake over ground. • If using cleaners (such as acid based wheel cleaners) use a rag to wipe them on and off, do not rinse them off with water. • If possible, divert runoff from automobile washing to a grassy surface large enough to contain and allow complete infiltration • Dispose of excess wash water into the sanitary sewer (i.e. via sink, or toilet) or onto a landscaped area that will allow for complete infiltration. • Conduct engine degreasing at a commercial facility that is set up to handle that type of waste. Recommended Activities • When possible, use commercial wash facilities • Wash vehicles over pervious surfaces such as lawns and gravel areas • Choose soaps, cleaners, or detergents labeled “non-toxic”, “phosphate free”, or “biodegradable”. Vegetable and citrus-based products are typically safest for the environment. • Turn off water when not actively washing down automobile. • If available, use established neighborhood wash areas, where runoff is properly controlled and managed. For additional information contact: County of Orange, OC Watershed Main: (714) 955-0600/ 24hr Water Pollution Discharge Hotline 1-877-89-SPILL or visit our website at: www.ocwatersheds.com R-3 AUTOMOBILE PARKING The activities outlined in this fact sheet target the following pollutants: Sediment x Nutrients Bacteria Foaming Agents Metals X Hydrocarbons X Hazardous Materials x Pesticides and Herbicides Other Parked automobiles may contribute pollutants to the storm drain because poorly maintained vehicles may leak fluids containing hydrocarbons, metals, and other pollutants. In addition, heavily soiled automobiles may drop clods of dirt onto the parking surface, contributing to the sediment load when runoff is present. During rain events, or wash-down activities, the pollutants may be carried into the storm drain system. The pollution prevention activities outlined in this fact sheets are used to prevent the discharge of pollutants to the storm drain system. Think before parking your car. Remember - The ocean starts at your front door. Required Activities • If required, vehicles have to be removed from the street during designated street sweeping/cleaning times. • If the automobile is leaking, place a pan or similar collection device under the automobile, until such time as the leak may be repaired. • Use dry cleaning methods to remove any materials deposited by vehicles (e.g. adsorbents for fluid leaks, sweeping for soil clod deposits). Recommended Activities • Park automobiles over permeable surfaces (e.g. gravel, or porous cement). • Limit vehicle parking to covered areas. • Perform routine maintenance to minimize fluid leaks, and maximize fuel efficiency. For additional information contact: County of Orange, OC Watershed Main: (714) 955-0600/ 24hr Water Pollution Discharge Hotline 1-877-89-SPILL or visit our website at: www.ocwatersheds.com R-4 HOME AND GARDEN CARE ACTIVITIES The activities outlined in this fact sheet target the following pollutants: Sediment x Nutrients Bacteria x Foaming Agents x Metals x Hydrocarbons x Hazardous Materials x Pesticides and Herbicides Other x HOME CARE Many hazardous materials may be used in and around residences during routine maintenance activities (such as: oils, paints, cleaners, bleaches, pesticides, glues, solvents, and other products). Improper or excessive use of these products can increase the potential for pollutants to be transported to the storm drain by runoff. The pollution prevention activities outlined in this fact sheets are used to prevent the discharge of pollutants to the storm drain system. Think before conducting home care activities. Remember - The ocean starts at your front door. Required Activities • Clean out painting equipment in an area where the waste can be contained and properly disposed of (latex – sewer, oil based – household hazardous waste center). • Rinse off cement mixers and cement laden tools in a contained washout area. Dispose of dried concrete waste in household trash. • If safe, contain, clean up, and properly dispose all household hazardous waste spills. If an unsafe condition exists, call 911 to activate the proper response team. • Household hazardous materials must be stored indoors or under cover, and in closed and labeled containers. Dispose of them at a household hazardous waste center. • Household wash waters (e.g. washer machine effluent, mop water, etc.) must be disposed of in the sanitary sewer. • Pool and spa water may be discharged to the storm drain if residual chlorine is less than 0.1 mg/L, the pH is between 6.5 and 8.5, and the water is free from any unusual coloration. (Call 714-834-6107 to obtain information on a pool drain permit). Pool filter media must be contained and disposed of properly. Recommended Activities • Only purchase the types and amounts of materials needed. • Share unused portions of products with neighbors or community programs (latex paint) For additional information contact: County of Orange, OC Watershed Main: (714) 955-0600/ 24hr Water Pollution Discharge Hotline 1-877-89-SPILL or visit our website at: www.ocwatersheds.com GARDEN CARE Garden activities may contribute pollutants via soil erosion, green waste, fertilizer and pesticide use. Plant and garden care activities such as landscape maintenance, fertilization, and pesticide application have the potential to discharge significant quantities of pollutants to the storm drain system. Nonvegetated surfaces may allow for significant erosion leading to high sediment loads. Other pollutants such as pesticides may adsorb onto the soil particles and be transported off site. Excess fertilizer and pesticide pollutants from over application may be carried to the storm drain by dissolving in irrigation runoff or rainwater. Green wastes may also contain organic matter and may have adsorbed fertilizers and pesticides. The activities outlined in this fact sheet target the following pollutants: Sediment x Nutrients x Bacteria x Foaming Agents Metals Hydrocarbons Hazardous Materials Pesticides and Herbicides x Other x Excessive irrigation is often the most significant factor in home and garden care activities. Pollutants may dissolve in irrigation water and then be transported to the storm drain, or particles and materials coated with fertilizers and pesticides may be suspended in the irrigation flow and carried to the storm drain. The pollution prevention activities outlined in this fact sheets are used to prevent the discharge of pollutants to the storm drain system. Think before conducting garden care activities. Remember - The ocean starts at your front door. Required Activities • Irrigation systems must be properly adjusted to reflect seasonal water needs. • Minimize the use of pesticides and fertilizers. Read the labels and follow directions to avoid improper use. Do not apply chemicals if it is windy or about to rain. • Properly clean up and dispose of spills of gardening chemicals, fertilizes, or soils. If possible, return the spilled material to the container for future use. • Lawn and garden care products must be stored in closed labeled containers, in covered areas, or off-ground and under protective tarps. • Household hazardous waste must be properly disposed at a household hazardous waste center. • Cover nonvegetated surfaces to prevent erosion. Recommended Activities • Utilize xeroscaping and use of drought and insect resistant landscaping. • Cultivate garden often to control weeds • Use integrated pest management (IPM). Planting pest repelling plants (e.g. Marigolds) or using pest eating insects (e.g. ladybugs) may reduce the need for pesticides. • Do not leave food (human or pet) outside overnight • Remove fruit and garden waste For additional information contact: County of Orange, OC Watershed Main: (714) 955-0600/ 24hr Water Pollution Discharge Hotline 1-877-89-SPILL or visit our website at: www.ocwatersheds.com R-5 DISPOSAL OF PET WASTES Pet wastes left in the environment may introduce solids, bacteria, and nutrients to the storm drain. The type and quantity of waste will dictate the proper disposal method. Small quantities of waste are best disposed with regular trash or flushed down a toilet. Large quantities of wastes from herbivore animals may be composted for subsequent use or disposal to landfill. The activities outlined in this fact sheet target the following pollutants: Sediment x Nutrients x Bacteria x Foaming Agents Metals Hydrocarbons Hazardous Materials Pesticides and Herbicides Other Pick up after your pet! It’s as easy as 1-2-3. 1) Bring a bag. 2) Clean it up. 3) Dispose of it properly (toilet or trash). The pollution prevention activities outlined in this fact sheets are used to prevent the discharge of pollutants to the storm drain system. Think before you dispose of any pet wastes. Remember - The ocean starts at your front door. Required Activities • All pet wastes must be picked up and properly disposed of. Pet waste should be disposed of in the regular trash, flushed down a toilet, or composted as type and quantities dictate. • Properly dispose of unused flea control products (shampoo, sprays, or collars). • Manure produced by livestock in uncovered areas should be removed at least daily for composting, or storage in water-tight container prior to disposal. Never hose down to stream or storm drain. Composting or storage areas should be configured and maintained so as not to allow contact with runoff. Compost may be donated to greenhouses, nurseries, and botanical parks. Topsoil companies and composting centers may also accept composted manure. • Line waste pits or trenches with an impermeable layer, such as thick plastic sheeting. • When possible, allow wash water to infiltrate into the ground, or collect in an area that is routed to the sanitary sewer. • Confine livestock in fenced in areas except during exercise and grazing times. Restrict animal access to creeks and streams, preferably by fencing. For additional information contact: County of Orange, OC Watershed Main: (714) 955-0600/ 24hr Water Pollution Discharge Hotline 1-877-89-SPILL or visit our website at: www.ocwatersheds.com • Install gutters that will divert roof runoff away from livestock areas. Recommended Activities • In order to properly dispose of pet waste, carry bags, pooper-scooper, or equivalent to safely pick up pet wastes while walking with pets. • Bathe pets indoors and use less toxic shampoos. When possible, have pets professionally groomed. • Properly inoculate your pet in order to maintain their health and reduce the possibility of pathogens in pet wastes. • Maintain healthy and vigorous pastures with at least three inches of leafy material. • Consider indoor feeding of livestock during heavy rainfall, to minimize manure exposed to potential runoff. • Locate barns, corrals, and other high use areas on portions of property that either drain away from or are located distant form nearby creeks or storm drains. For additional information contact: County of Orange, OC Watershed Main: (714) 955-0600/ 24hr Water Pollution Discharge Hotline 1-877-89-SPILL or visit our website at: www.ocwatersheds.com R-6 DISPOSAL OF GREEN WASTES The activities outlined in this fact sheet target the following pollutants: Sediment x Nutrients x Bacteria x Foaming Agents Metals Hydrocarbons Hazardous Materials x Pesticides and Herbicides x Other Green wastes entering the storm drain may clog the system creating flooding problems. Green wastes washed into receiving waters create an oxygen demand as they are decomposed, reducing the available oxygen for aquatic life. Pesticide and nutrient residues may be carried to the receiving water with the green wastes. The pollution prevention activities outlined in this fact sheets are used to prevent the discharge of pollutants to the storm drain system. Think before disposing of any green wastes – Remember - The ocean starts at your front door. Required Activities • Green wastes can not be disposed of in the street, gutter, public right-of-way, storm drain, or receiving water. Dispose of green wastes as a part of the household trash. If the quantities are too large, arrange a pick up with the local waste hauler. • After conducting yard or garden activities sweep the area and properly dispose of the clippings and waste. Do not sweep or blow out into the street or gutter. Recommended Activities • Utilize a commercial landscape company to conduct the landscape activities and waste disposal. • Utilize native plants and drought tolerant species to reduce the water use and green waste produced. • Use a lawn mower that has a mulcher so that the grass clippings remain on the lawn and do not have to be collected and disposed of. • Compost materials in a designated area within the yard. • Recycle lawn clippings and greenery waste through local programs if available. For additional information contact: County of Orange, OC Watershed Main: (714) 955-0600/ 24hr Water Pollution Discharge Hotline 1-877-89-SPILL or visit our website at: www.ocwatersheds.com R-7 HOUSEHOLD HAZARDOUS WASTE Household hazardous wastes (HHW) are defined as waste materials which are typically found in homes or similar sources, which exhibit characteristics such as: corrosivity, ignitability, reactivity, and/or toxicity, or are listed as hazardous materials by EPA. Many types of waste can be recycled, however options for each waste type are limited. Recycling is always preferable to disposal of unwanted materials. All gasoline, antifreeze, waste oil, and lead-acid batteries can be recycled. Latex and oil-based paint can be reused, as well as recycled. Materials that cannot be reused or recycled should be disposed of at a properly permitted landfill. The activities outlined in this fact sheet target the following pollutants: Sediment Nutrients Bacteria Foaming Agents x Metals x Hydrocarbons x Hazardous Materials x Pesticides and Herbicides x Other x List of most common HHW products: Drain openers Oven cleaners Wood and metal cleaners and polishes Automotive oil and fuel additives Grease and rust solvents Carburetor and fuel injection cleaners Starter fluids Batteries Paint Thinners Paint strippers and removers Adhesives Herbicides Pesticides Fungicides/wood preservatives Think before disposing of any household hazardous waste. Remember - The ocean starts at your front door. Required Activities • Dispose of HHW at a local collection facility. Call (714) 834-6752 for the household hazardous waste center closest to your area. • Household hazardous materials must be stored indoors or under cover, and in closed and labeled containers. • If safe, contain, clean up, and properly dispose all household hazardous waste spills. If an unsafe condition exists, call 911 to activate the proper response team. Recommended Activities • Use non-hazardous or less-hazardous products. • Participate in HHW reuse and recycling. Call (714) 834-6752 for the participating household hazardous waste centers. For additional information contact: County of Orange, OC Watershed Main: (714) 955-0600/ 24hr Water Pollution Discharge Hotline 1-877-89-SPILL or visit our website at: www.ocwatersheds.com The California Integrated Waste Management Board has a Recycling Hotline (800) 553-2962, that provides information and recycling locations for used oil. R-8 WATER CONSERVATION Excessive irrigation and/or the overuse of water is often the most significant factor in transporting pollutants to the storm drain system. Pollutants from a wide variety of sources including automobile repair and maintenance, automobile washing, automobile parking, home and garden care activities and pet care may dissolve in the water and be transported to the storm drain. In addition, particles and materials coated with fertilizers and pesticides may be suspended in the flow and be transported to the storm drain. Hosing off outside areas to wash them down not only consumes large quantities of water, but also transports any pollutants, sediments, and waste to the storm drain system. The pollution prevention activities outlined in this fact sheets are used to prevent the discharge of pollutants to the storm drain system. The activities outlined in this fact sheet target the following pollutants: Sediment x Nutrients x Bacteria x Foaming Agents x Metals x Hydrocarbons x Hazardous Materials x Pesticides and Herbicides x Other x Think before using water. Remember - The ocean starts at your front door. Required Activities • Irrigation systems must be properly adjusted to reflect seasonal water needs. • Do not hose off outside surfaces to clean, sweep with a broom instead. Recommended Activities • Fix any leaking faucets and eliminate unnecessary water sources. • Use xeroscaping and drought tolerant landscaping to reduce the watering needs. • Do not over watering lawns or gardens. Over watering wastes water and promotes diseases. • Use a bucket to re-soak sponges/rags while washing automobiles and other items outdoors. Use hose only for rinsing. • Wash automobiles at a commercial car wash employing water recycling. For additional information contact: County of Orange, OC Watershed Main: (714) 955-0600/ 24hr Water Pollution Discharge Hotline 1-877-89-SPILL or visit our website at: www.ocwatersheds.com UP N6 1 ° 0 0 ' 0 0 " W 3 5 . 0 0 ' N29°00'00"E 90.00' N29°00'00"E 90.00' N6 1 ° 0 0 ' 0 0 " W 3 5 . 0 0 ' A-13,150 SF (3,049 IMP) 52 SF INFILTRATIONTRENCH ANTEPARA RESIDENCEPROJECT: 22056 | DATE: DECEMBER 22, 2022 WATER QUALITY MANAGEMENT PLAN FOR 604 VIA LIDO NORD, NEWPORT BEACH LEGEND SUB-AREA DELINEATION INFILTRATION TRENCH = 52 SF SUB-AREA DESIGNATION SUB-AREA SQUARE FOOTAGE A-52,786 SF BUILDING AREA = 1,900 SF IMPERVIOUS AREA = 3,049 SF LANDSCAPE AREA = 101 SF LANDSCAPING OR PAVERS 3" COVER MINIMUM 4" DIA. PERFORATED PVC DRAIN PIPE W/ PERFORATIONS AT BOTTOM 3/4" CRUSHED ROCK WRAP SIDES AND BOTTOM OF TRENCH WITH FILTER FABRIC; PROVIDE 4" MINIMUM OVERLAP AT TOP OF TRENCH PERFORATED DRAIN PIPE AND TRENCH NO SCALE