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Home My WebLink AboutPA2022-0306_20230119_WQMP report dated 06-08-2021PA2022-0306 WQ 2126-2020 County of Orange/Santa Ana Region Priority Project Water Quality Management Plan (WQMP) Project Name: Antoci's Residence GRADING PERMIT NO.2126-2020, ADDRESS: 2286 CHANNEL RD, NEWPORT BEACH, LOT 4,TRACT 518 APN. 048-283-02 Prepared for: Vito & Tiffany Antoci 2286 Channel Rd Newport Beach, CA 92661 Phone: 949.244.9329 Prepared by: JT Consulting Engineers 11251 Gardenaire Ln Garden Grove, CA 92841 1-714-815-2356 / jdtran07@gmail.com Date Prepared: 6/08/21 PA2022-0306 PA2022-0306 Water Quality Management Plan (WQMP) Levin’s Residence 2286 Channel Rd Owner’s Certification North OC Priority WQMP Template August 17 2011 Page ii Preparer (Engineer): John Tran Title Principal PE Registration # C-62653 Company JT Consulting Engineers Address 11251 Gardenaire Ln, Garden Grove, Ca Email jdtran07@gmail.com Telephone # 714-815-2356 I hereby certify that this Water Quality Management Plan is in compliance with, and meets the requirements set forth in, Order No. R8-2009-0030/NPDES No. CAS618030, of the Santa Ana Regional Water Quality Control Board. Preparer Signature Date 3-17-2021 Place Stamp Here PA2022-0306 Priority Project Water Quality Management Plan (WQMP) Antoci’s Residence 2286 Channel Rd Table of Contents North OC Priority WQMP Template August 17 2011 Page iii Contents Page No. Section I Permit(s) and Water Quality Conditions of Approval or Issuance .......... 1 Section II Project Description .................................................................................. 2 Section III Site Description ........................................................................................ 6 Section IV Best Management Practices (BMPs) ........................................................ 8 Section V Inspection/Maintenance Responsibility for BMPs ................................. 25 Section VI BMP Exhibit (Site Plan) .......................................................................... 26 Section VII Educational Materials ............................................................................. 27 Attachments Attachment A . .................................................................................. Educational Materials PA2022-0306 Priority Project Water Quality Management Plan (WQMP) Antoci’s Residence 2286 Channel Rd Section I North OC Priority WQMP Template August 17 2011 Page 1 Section I Permit(s) and Water Quality Conditions of Approval or Issuance Project Infomation Permit/Application No. (If applicable) N/A Grading or Building Permit No. (If applicable) Address of Project Site (or Tract Map and Lot Number if no address) and APN 2286 Channel Rd: Lot 4 Tract 518, APN 048-283-02 Water Quality Conditions of Approval or Issuance Water Quality Conditions of Approval or Issuance applied to this project. (Please list verbatim.) The project site is in the Newport Coastal Streams Watersheds and the water quality is currently listed by the State of California (Approved 2010 303(d) listed Water Bodies & Associated POC) as impaired by the pollutant of Indicator Bacteria. Conceptual WQMP Was a Conceptual Water Quality Management Plan previously approved for this project? No Watershed-Based Plan Conditions Provide applicable conditions from watershed - based plans including WIHMPs and TMDLS. The Newport Coastal Streams Watershed covers 7.77 square miles, chiefly in the unincorporated area between the Newport Beach and Laguna Beach. Newport Coast and Muddy Creek, its main tributaries, drain the San Joaquin Hills. There are two receiving water bodies, Morning Canyon Creek & Buck Gully Creek, in this watershed. However, the Lower Newport Bay is the downstream receiving water body from the project site, which is not potentially susceptible to hydromodification impacts. Currently, there are three programs are on implementation phase to reduce TMDLs. These programs to reduce pollutants of concern to acceptable level per EPA guidelines‐nutrients, pathogens, and siltation. PA2022-0306 0 7 05 E . F 1 9 F 1 9 F20 S A N F 1 8 F20 G04 F05 F22 F23 F 0 4 F 2 1 F 2 5 F 18 F05 F 2 7 F 1 0 F16 F03 F 2 6 F14 F17 F11 F06 F 0 7 F 1 5 F01 F 0 2 F05 F24 F12 G 00 P 0 7 MESA C H N L AGUA C H A N N EL C Y N. CHNL C H N L. F08P2 0 F08P02 C H N L . CREEK CREEK CHNL. SANTA CHNL. NORTH F23P15 F08P01 F08P09 F 0 9 P 1 0 F 0 9 P 0 5 CANYON G 0 2 P 0 2 F07B01 F23P12 F 2 3 P 0 1 G04P01 G 0 0 P 0 1 BOMMER F14P01 CHINON F23 P 1 1 G04P02 F23P16 F20P 04 BONITA F23S02G04P03 F19P07 G02P01 F 2 3 P 02 F 1 9 P 1 3 F 2 1 P 0 2 G03P01 F 2 0 P 0 7 F07S05 F13P02 F19P01 G 0 3 P 0 2 F25S05 F08P07 F 1 9 P 1 1 F 0 7 S 0 1 F 1 9 P 1 2 F 1 9 P 0 3 F 2 3 P 0 5 F 2 3 P 0 9 CANADA F19P02 F19P05F14P11 F24P 02 F 1 5 P 0 3 F01S03 F 0 7 P 1 4 F23P07 G03P03 G 0 0 D 0 2 F01P10 F05P19 F19P04 F 0 6 B 0 1 F 1 5 P 0 1 F 1 5 P 1 1 F08P08 F 0 8 P 1 0 F07P01 F10P07 F07P08 F07P07 F27P05 F 0 1 S 0 1 F07P06 F27P01 F14P02 F 2 3 P 0 3 F 2 5 B 0 1 F 0 5 P 1 8 TUSTIN F 0 6 S 0 2 F27P02 F14S01 F 0 7 P 2 3 F26P02F26P01 F03P02 F07P19 F27P04 CANYON F 0 6 P 0 3 F06P05 F12P03 F12P04 F05S03 F12P02 F27P03 F05P04 F05P27 MODENA F 0 6 P 0 2 F07P28F12P11 F06P07 F14P04 F 0 6 P 0 8 F16P01 F 0 7 P 0 4 F13P05 F13P06 F10S02 SERRANOBORREGO C H A N N E L C H A N N E L J O A Q U IN CHNL. GARDENS F07S1P12 - IRVINE MARSHBURN S A N T A A N A S A N DIE G O PAULARINO ANA-DELHI RATTLESNAKE SANTA ISABEL C E N T R A L IR VI N E F P F 0 7 P1 2 EL F19 G03 G02 BEE F13 F 0 9F08 ANA C H N L C O M O C H N L C H N L LANE CH NL . C HNL SAND CHNL CHNL F09P15 F09P02 F08P17 F09P01 C H N L . C HNL. R O U N D HICKS CHNL. S T O R M COSTA SA NTA C H N L. F 0 8 P 1 5 F09P03 F 0 9 P 0 6 F 0 9 P 0 4 F 0 9 P 0 8 F 0 8 P 1 3 C Y N . F23P14 F 1 9 P 0 6 F 2 3 P 0 4 F 23D0 1 F10S01 CANYO N P E T E R S F25P02 F10P02 F06P04 F 0 6 S 0 3 F10P01 F13P01 F25P01 F10P03 F13P03 S A N T A F E S. WEST TUSTIN CHNL. C A N Y O N CYN. CANYON CH A N N E L CHA N N E L CHAN N E L F18 Aliso CreekAliso Creek AnaheimAnaheim Bay-HuntingtonBay-Huntington HarbourHarbour Laguna Coastal StreamsLaguna Coastal Streams Newport BayNewport Bay NewportNewport CoastalCoastal StreamsStreams San Juan CreekSan Juan Creek Santa Ana RiverSanta Ana River SANTA ANA ORANGE ANAHEIM TUSTIN MISSION VIEJO GARDEN GROVE NEWPORT BEACH COSTA MESA LAKE FOREST FOUNTAIN VALLEY LAGUNA BEACH VILLA PARK UNINCORPORATED UNINC. UNINC. ALISO VIEJO UNINC.UNINC. UNINCORPORATED IRVINE LAGUNA WOODS UNINCORPORATED LAGUNA HILLS ANAHEIM 1ST ST R O C K FI E L D B L V D CIVIC CENTER DR NEW P O RT BLVD WASHINGTON AV ANTON BLV D FAIRVIEW RD EDINGER AV 19TH ST MEADOWOOD Y A L E AV SANTA CLARA AV HARBOR BLVD R E D HILL AV WARNER AV LE V A N T O C ANYON V IEW AV BEAR ST IRVIN E AV 4TH ST A D A M S AV SUNFLOWER AV MACARTHUR BLVD 2 8 T H S T SUPE RIOR AV C ULVE R D R BAKE PK WY BALBOA BLVD SY C A M O R E A V FLOWER ST C A M P U S D R BISON AV SA N JO A Q U I N HIL L S R D LAKE FO REST D R JEFF R E Y RD DYER RD NO RTH W O O D CHESTNUT AV FAIRHAVEN AV BIR C H ST M U I R L A N DS B L V D VIA LID O YORBA ST P O R TO LA PKWY N E W PO RT AV 17TH ST MCFADDEN AV T U S T I N RANC H R D 5TH ST W ALN U T A V SEGERSTROM AV STANDARD AV S A N T A A N A BLVD B R O W NIN G AV HEWES ST MA B U R Y S T 17TH RD17TH ST B A YSIDE DR ALTO N AV ALTON P K W Y FAIR DR IR VIN E BLV D COAST HWY WE ST W O OD MICHEL S O N D R IRVINE BLVD LINCOLN AV BAKER ST BR O A D W A Y 15TH ST N E WPORT B LV D W EST CLIFF D R ORCHARD PARK PAULARINO AV BARRA N C A PK W Y EAS T W O O D BAKER AV 16TH ST AV OCADO AV C A RLSON AV SAN T A M A R IA AV RIDGE ROUTE DR EL C AMIN O R E A L B RYAN AV T O L E DO W Y VON KARMAN A V SA N D CA N YO N AV R A N C HO PKWY TUSTIN AV M A RGU ERI T E AV FORD RD U N IV E R SIT Y DR JA M B O R E E B LV D ARLINGTON DR A L T O N P K W Y LA G U N A R D MACARTHUR BLV D T R A B U C O R D LA GUNA CANYON R D B O N I TA CANYON DR M Y F O R D R D QUAIL HI L L PKWY C REEK RD L A K E RD T E C HNOL O G Y D R MERRIMAC WY JAM B O R E E R D BRISTOL ST PLACENTIA AV IR VI N E C E NTER DR HARVARD A V GRAND AV D OVER DR MAIN ST RAITT ST S O U T H W O O D TURTLE ROCK D R HEWES AV JERONIMO R D S A N MIGUEL DR EAST Y ALE L O O P R I D G E L IN E D R EASTBLUF F D R J A M B O REE R D W E ST YAL E LOOP A VENI D A D E L A C A R L O T A N E W P O R T C O A S T DR Dana Point Coastal Streams Laguna Coastal Streams Newport Bay San Clemente Coastal Streams San Juan Creek San Mateo Creek Santa Ana River Area of Interest Newport Coastal Streams Aliso Creek San Gabriel - Coyote Creek Anaheim Bay - Huntington Harbour 0 5,000 10,000 15,000 20,0002,500 Feet ± 97294 Acres WATERSHED: NEWPORT BAY COUNTY OF ORANGE, CALIFORNIA DATE: The County of Orange and Geomatics/LIS/GIS make no representations or warranties regarding the accuracy of the data from which this map was derived. Neither the County nor Geomatics/LIS/GIS shall be liable under any circumstances for any direct, indirect, special, incidental or consequential damages with respect to any claim by any user or any third party on account of or arising from the use of this map. DESIGNED AND PRODUCED BY: OC Public Works GIS Mapping Unit Philip Pappas DATA SOURCE: - Geomatics Land Information Systems Division November 18, 2009 F:\PROJECTS\Phil\Watersheds\Watersheds.mxd LAND USE Agricultural Commercial Industrial Public Residential No Available Data Vacant ACRES 6262 10030 5257 16599 27009 15749 729 Acres 27,000 24,000 21,000 18,000 15,000 12,000 9,000 6,000 3,000 0 Va c a n t Ag r i c u l t u r a l Co m m e r c i a l In d u s t r i a l Pu b l i c Re s i d e n t i a l No A v a i l a b l e D a t a LAND USE Agricultural Commercial Industrial Public Residential No Available Data City / County Jurisdiction Major Streets Minor Streets Vacant PA2022-0306 Priority Project Water Quality Management Plan (WQMP) Antoci’s Residence 2286 Channel Rd Section II North OC Priority WQMP Template August 17 2011 Page 2 Section II Project Description II.1 Project Description Description of Proposed Project Development Category (From Model WQMP, Table 7.11-2; or -3): This is a Priority project. Project Area (ft2): 3500 Number of Dwelling Units: 1 SIC Code: 1521 Project Area Pervious Impervious Area (acres or sq ft) Percentage Area (acres or sq ft) Percentage Pre-Project Conditions 88 sq ft 2.5 3412 sq ft 97.5% Post-Project Conditions 88 sq ft 52.5% 3412 sq ft 97.5% Drainage Patterns/Connections The existing on-site drainage patterns are listed as follows: The runoffs of entire site are drain toward Channel Road by sheet flow. Narrative Project Description: (Use as much space as necessary.) This project is to replace the existing 2-story dwelling unit with a new two-story building. The configuration of the existing site contains the following: A single family dwelling with the 2- car garage facing the Channel Road The lot consists of a level pad (12.00' elevation), which is elevated at 1.5' foot above existing finished (10.5' elevation) of curb and gutter. PA2022-0306 Priority Project Water Quality Management Plan (WQMP) Antoci’s Residence 2286 Channel Rd Section II North OC Priority WQMP Template August 17 2011 Page 3 II.2 Potential Stormwater Pollutants Pollutants of Concern Pollutant Check One for each: E=Expected to be of concern N=Not Expected to be of concern Additional Information and Comments Suspended-Solid/ Sediment E N The receiving water body is Lower Newport Bay. Not on 2010 303(d) list Nutrients E N The receiving water body is Lower Newport Bay. Not on 2010 303(d) list Heavy Metals E N The receiving water body is Lower Newport Bay. Not on 2010 303(d) list. Roof Tile Pathogens (Bacteria/Virus) E N The receiving water body is Lower Newport Bay. Not on 2010 303(d) list Pesticides E N The receiving water body is Lower Newport Bay. On 2010 303(d) list Oil and Grease E N The receiving water body is Lower Newport Bay. Not on 2010 303(d) list Toxic Organic Compounds E N The receiving water body is Lower Newport Bay. On 2010 303(d) list Trash and Debris E N The receiving water body is Lower Newport Bay. Not on 2010 303(d) list PA2022-0306 Priority Project Water Quality Management Plan (WQMP) Antoci’s Residence 2286 Channel Rd Section II North OC Priority WQMP Template August 17 2011 Page 4 II.3 Hydrologic Conditions of Concern Determine if streams located downstream from the project area are potentially susceptible to hydromodification impacts. No – Show map Yes – Describe applicable hydrologic conditions of concern below. The runoffs from the site will be filtered by fossil filters and transported to infiltration trench, via sub-drain piping, to the curb drain at the driveway, northwest corner of the property, to existing storm drain system of Channel. In other words, the runoff was directly discharged into the Newport Bay and no streams located downstream from the project area are potentially susceptible to hydromodification impacts. II.4 Post Development Drainage Characteristics Describe post development drainage characteristics. The post‐development on‐site runoff will be collected and transported, via proposed piping systems, to the infiltration trench at the southeast corner of the lot and overflow thru proposed curb drain on driveway and sheetflow to existing storm drain system on Channel Road. II.5 Property Ownership/Management Describe property ownership/management. Vito Antoci is the property owner of this development and will be responsible for the maintenance of all on-site stormwater facilities during his ownership. PA2022-0306 P: \ 9 5 2 6 E \ 6 - G I S \ M x d s \ R e p o r t s \ I n f i l t r a t i o n F e a s a b i l i t y _ 2 0 1 1 0 2 1 5 \ 9 5 2 6 E _ F i g u r e X V I - 3 d _ N e w p o r t B a y S u s c e p t i b i l i t y _ 2 0 1 0 0 4 3 0 . m x d Santa Ana River Watershed Santa Ana River Watershed South Orange County Anaheim Bay- Huntington Harbor Watershed JohnWayneAirport LOWER PETERSCANYON RETARDINGBASIN HICKS CANYONRETARDINGBASIN SIPHONRESERVOIR ROUND CANYONRETARDINGBASIN BEE CANYONRETARDINGBASIN EASTFOOTRETARDINGBASIN ORCHARD ESTATESRETENTION BASIN AGUA CHINONRETARDINGBASIN VILLAGEPOND PARK SAND CANYONRESERVOIR SAN JOAQUINRESERVOIR LAGUNARESERVOIR BIG CANYONRESERVOIR BONITACANYONRESERVOIR BASINNUMBER 1 NORTHLAKE SOUTHLAKEBASINNUMBER 2 EL MODENA-IRVINERETARDING BASIN HARBORVIEW DAM EAST HICKSCANYONRETARDING BASIN RATTLESNAKERESERVOIR TRABUCORETARDINGBASIN MARSHBURNRETARDINGBASIN FIGURE XVI-3d JO B TI T L E SC A L E 1" = 4 0 0 0 ' DE S I G N E D DR A W I N G CH E C K E D BM P 04 / 3 0 / 1 0 DA T E JO B N O . 95 2 6 - E THTH OR A N G E C O U N T Y WA T E R S H E D MA S T E R P L A N N I N G OR A N G E C O . CA SU S C E P T I B I L I T Y A N A L Y I S NE W P O R T B A Y - NE W P O R T C O A S T A L S T R E A M S !I 0 8,000 16,0004,000 Feet Susceptibility Potential Areas of Erosion, Habitat, & Physical Structure Susceptibility Channel Type Earth (Unstable) Earth (Stabilized) Stabilized Tidel Influence <= Mean High Water Line (4.28') Water Body Basin Dam Lake Reservoir Other Lands Airport/Military PRELIMINARY MAPSUBJECT TO FURTHER REVISION PA2022-0306 Priority Project Water Quality Management Plan (WQMP) Antoci’s Residence 2286 Channel Rd Section III North OC Priority WQMP Template August 17 2011 Page 5 Section III Site Description III.1 Physical Setting Fill out table with relevant information. Name of Planned Community/Planning Area (if applicable) Location/Address 2286 Channel Road Newport Beach, CA 92661 General Plan Land Use Designation RS-D Zoning R-1 Acreage of Project Site 0.0803 Acres Predominant Soil Type Hydrologic Soil Group (HSG) D PA2022-0306 Priority Project Water Quality Management Plan (WQMP) Antoci’s Residence 2286 Channel Rd Section III North OC Priority WQMP Template August 17 2011 Page 6 III.2 Site Characteristics Site Characteristics Precipitation Zone Design Capture Storm Depth (Inches) : 0.70 Topography The existing building area including side yards and front yard, is on level pad , about 1.5’ above the existing flow line of Channel Road. Drainage Patterns/Connections The entire site is drained as sheet flow toward the front of the lot to concrete driveway on Channel Road. Soil Type, Geology, and Infiltration Properties Following are the statements of subsurface conditions by Robert McCarthy Consulting, Inc. The results of our on-site field investigation, as well as nearby investigations by us and others, indicate that the site is underlain by Class D medium dense to dense sands and gravels overlying a bedrock shelf. We recommend using a characterization of this property as a Class D (Default), “Stiff Soil,” Site Classification. Hydrogeologic (Groundwater) Conditions Groundwater was encountered at depths of about 7.5 to 8.5-feet in our exploratory borings. Groundwater levels are anticipated to remain near existing elevations at about elevation +3 in the area. Groundwater is tidal influenced and will fluctuate daily. Geotechnical Conditions (relevant to infiltration) From a geotechnical standpoint, on-site water infiltration is allowable. A minimum setback of 3 feet from the nearest foundation is recommended for large volume runoff. Simple trench drains and permeable pavement surfaces may be allowable without setback with appropriate agency and geotechnical review and approvals. Proposed water infiltration features should be reviewed and approved by the Geotechnical Consultant. Off-Site Drainage No obvious evidence of erosive discharge onto or from the site was noted. PA2022-0306 PA2022-0306 PA2022-0306 PA2022-0306 Priority Project Water Quality Management Plan (WQMP) Antoci’s Residence 2286 Channel Rd Section III North OC Priority WQMP Template August 17 2011 Page 7 Utility and Infrastructure Information III.3 Watershed Description Receiving Waters Lower Newport Bay 303(d) Listed Impairments DDT (Dichlorodiphenyltrichloroethane), Dieldrin , and PCBs Applicable TMDLs Not available until 2022 Pollutants of Concern for the Project Pathogens , Oil & Grease, metal copper Environmentally Sensitive and Special Biological Significant Areas The project is located within the Environmentally Sensitive Areas. PA2022-0306 Priority Project Water Quality Management Plan (WQMP) Antoci’s Residence 2286 Channel Rd Section IV North OC Priority WQMP Template August 17 2011 Page 8 Section IV Best Management Practices (BMPs) IV. 1 Project Performance Criteria (NOC Permit Area only) Is there an approved WIHMP or equivalent for the project area that includes more stringent LID feasibility criteria or if there are opportunities identified for implementing LID on regional or sub-regional basis? YES NO If yes, describe WIHMP feasibility criteria or regional/sub-regional LID opportunities. PA2022-0306 Priority Project Water Quality Management Plan (WQMP) Antoci’s Residence 2286 Channel Rd Section IV North OC Priority WQMP Template August 17 2011 Page 9 Project Performance Criteria If HCOC exists, list applicable hydromodification control performance criteria (Section 7.II-2.4.2.2 in MWQMP) Since HCOC does not exist so hydromodification will not be considered. See attached map. List applicable LID performance criteria (Section 7.II-2.4.3 from MWQMP) Priority projects must infiltrate, harvest and re- use, evapotranspire, or bio/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) On site infiltration the runoff from the 24-hour, 85th percentile storm event, as determined from the County of Orange’s 85th Percentile Precipitation Isopluvial Map and draw down the stored volume in no more than 48 hours following the end of precipitation. Calculate LID design storm capture volume for Project. Volume-based BMP = 181 CF for DMA 1 CATCH AREA = DMA1 = 3412 S.F.; LOT AREA = 3500 S.F. Impervious = 3412/3500= 0.975 C=0.75*0.975+0.15=0.88 DCV=(0.88*.7*3600)/12= 181 CF DCV = 181 CF PA2022-0306 Priority Project Water Quality Management Plan (WQMP) Antoci’s Residence 2286 Channel Rd Section IV North OC Priority WQMP Template August 17 2011 Page 10 IV.2. Site Design and Drainage Volume-based BMPs Sizing: The runoff of DMA1, which include rooftops and hardscape, will be collected by the multiple area drains via pipe, conveying runoff to infiltration trenches. Attached are DMAs and associated DCV to be mitigated by the proposed BMPs: Description of Drainage Management Area (DMA) Area (S.F.) Design Capture Volume (DCV) Proposed BMPs Discharge Locations Rooftops & Hardscape (DMA1) 3412 181 CF Filter media (Flogard Filter) On site DMA1: Impervious = 3412/3500= 0.975 C=0.75*0.975+0.15=0.88 DCV=(0.88*.7*3600)/12= 181 CF DCV = 181 CF = 1350 gal Use concrete cistern to retain minimum 1350 gal for 24 hour event. GIS BMP COORDINATE: 33.59633967396352, -117.88207636917453 PA2022-0306 Priority Project Water Quality Management Plan (WQMP) Antoci’s Residence 2286 Channel Rd Section IV North OC Priority WQMP Template August 17 2011 Page 11 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. IV.3.1 Hydrologic Source Controls (HSCs) 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: vegated slope (undisturbed) on-lot infiltration Other: Other: Other: Other: Other: Other: Other: PA2022-0306 Priority Project Water Quality Management Plan (WQMP) Antoci’s Residence 2286 Channel Rd Section IV North OC Priority WQMP Template August 17 2011 Page 12 Worksheet I: Summary of Groundwater‐related Feasibility Criteria 1 Is project large or small? (as defined by Table VIII.2) circle one Large Small 2 What is the tributary area to the BMP? A 0.0803 acres 3 What type of BMP is proposed? Infiltration Trench 4 What is the infiltrating surface area of the proposed BMP? ABMP 101 sq-ft 5 What land use activities are present in the tributary area (list all) single family dwelling 6 What land use-based risk category is applicable? L M H 7 If M or H, what pretreatment and source isolation BMPs have been considered and are proposed (describe all): 8 What minimum separation to mounded seasonally high groundwater applies to the proposed BMP? See Section VIII.2 (circle one) 5 ft 10 ft 9 Provide rationale for selection of applicable minimum separation to seasonally high mounded groundwater: Rationale is per guideline of Section VIII.2 for residential application for proposed bioretention. 10 What is separation from the infiltrating surface to seasonally high groundwater? SHGWT 10 ft 11 What is separation from the infiltrating surface to mounded seasonally high groundwater? Mounded SHGWT 10 ft PA2022-0306 Priority Project Water Quality Management Plan (WQMP) Antoci’s Residence 2286 Channel Rd Section IV North OC Priority WQMP Template August 17 2011 Page 13 Worksheet I: Summary of Groundwater‐related Feasibility Criteria 12 Describe assumptions and methods used for mounding analysis: Mounding analysis is per prescriptive per Section VIII.2 TGD 13 Is the site within a plume protection boundary (See Figure VIII.2)? Y N N/A 14 Is the site within a selenium source area or other natural plume area (See Figure VIII.2)? Y N N/A 15 Is the site within 250 feet of a contaminated site? Y N N/A 16 If site-specific study has been prepared, provide citation and briefly summarize relevant findings: 17 Is the site within 100 feet of a water supply well, spring, septic system? Y N N/A 18 Is infiltration feasible on the site relative to groundwater-related criteria? Y N Provide rationale for feasibility determination: Per soil report, groundwater table is 10.0 ft, which is deeper than required 5.0’ separation per Section VIII.2 PA2022-0306 Priority Project Water Quality Management Plan (WQMP) Antoci’s Residence 2286 Channel Rd Section IV North OC Priority WQMP Template August 17 2011 Page 14 Table 2.7: Infiltration BMP Feasibility Worksheet Infeasibility Criteria Yes No 1 Would Infiltration BMPs pose significant risk for groundwater related concerns? Refer to Appendix VII (Worksheet I) for guidance on groundwater- related infiltration feasibility criteria. No Provide basis: Summarize findings of studies provide reference to studies, calculations, maps, data sources, etc. Provide narrative discussion of study/data source applicability. 2 Would Infiltration BMPs pose significant risk of increasing risk of geotechnical hazards that cannot be mitigated to an acceptable level? (Yes if the answer to any of the following questions is yes, as established by a geotechnical expert):  The BMP can only be located less than 50 feet away from slopes steeper than 15 percent  The BMP can only be located less than eight feet from building foundations or an alternative setback.  A study prepared by a geotechnical professional or an available watershed study substantiates that stormwater infiltration would potentially result in significantly increased risks of geotechnical hazards that cannot be mitigated to an acceptable level. No Provide basis: Soil report indicated groundwater is 6.5’ from existing finished surface. 3 Would infiltration of the DCV from drainage area violate downstream water rights? No Provide basis: Summarize findings of studies provide reference to studies, calculations, maps, data sources, etc. Provide narrative discussion of study/data source applicability. PA2022-0306 Priority Project Water Quality Management Plan (WQMP) Antoci’s Residence 2286 Channel Rd Section IV North OC Priority WQMP Template August 17 2011 Page 15 Table 2.7: Infiltration BMP Feasibility Worksheet (continued) Partial Infeasibility Criteria Yes No 4 Is proposed infiltration facility located on HSG D soils or the site geotechnical investigation identifies presence of soil characteristics which support categorization as D soils? Yes Provide basis: Summarize findings of studies provide reference to studies, calculations, maps, data sources, etc. Provide narrative discussion of study/data source applicability. 5 Is measured infiltration rate below proposed facility less than 0.3 inches per hour? This calculation shall be based on the methods described in Appendix VII. No Provide basis: Summarize findings of studies provide reference to studies, calculations, maps, data sources, etc. Provide narrative discussion of study/data source applicability. 6 Would reduction of over predeveloped conditions cause impairments to downstream beneficial uses, such as change of seasonality of ephemeral washes or increased discharge of contaminated groundwater to surface waters? No Provide citation to applicable study and summarize findings relative to the amount of infiltration that is permissible: Summarize findings of studies provide reference to studies, calculations, maps, data sources, etc. Provide narrative discussion of study/data source applicability. 7 Would an increase in infiltration over predeveloped conditions cause impairments to downstream beneficial uses, such as change of seasonality of ephemeral washes or increased discharge of contaminated groundwater to surface waters? No Provide citation to applicable study and summarize findings relative to the amount of infiltration that is permissible: Summarize findings of studies provide reference to studies, calculations, maps, data sources, etc. Provide narrative discussion of study/data source applicability. PA2022-0306 Priority Project Water Quality Management Plan (WQMP) Antoci’s Residence 2286 Channel Rd Section IV North OC Priority WQMP Template August 17 2011 Page 16 Table 2.7: Infiltration BMP Feasibility Worksheet (continued) Infiltration Screening Results (check box corresponding to result): 8 Is there substantial evidence that infiltration from the project would result in a significant increase in I&I to the sanitary sewer that cannot be sufficiently mitigated? (See Appendix XVII) Provide narrative discussion and supporting evidence: Summarize findings of studies provide reference to studies, calculations, maps, data sources, etc. Provide narrative discussion of study/data source applicability. No 9 If any answer from row 1-3 is yes: infiltration of any volume is not feasible within the DMA or equivalent. Provide basis: Groundwater table is too shallow, 4.0’ from existing grade. Summarize findings of infeasibility screening Yes 10 If any answer from row 4-7 is yes, infiltration is permissible but is not presumed to be feasible for the entire DCV. Criteria for designing biotreatment BMPs to achieve the maximum feasible infiltration and ET shall apply. Provide basis: Summarize findings of infeasibility screening No 11 If all answers to rows 1 through 11 are no, infiltration of the full DCV is potentially feasible, BMPs must be designed to infiltrate the full DCV to the maximum extent practicable. No PA2022-0306 Priority Project Water Quality Management Plan (WQMP) Antoci’s Residence 2286 Channel Rd Section IV North OC Priority WQMP Template August 17 2011 Page 17 IV.3.2 Infiltration BMPs Identify infiltration BMPs to be used in project. If design volume cannot be met, state why. 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. Infiltration Trenches will be utililized to mitigate DCV1 (181 cf). Kdesign=0.30 in/hr 85th percentile storm=0.75; Catchment area = 3500 s.f. Vdesign=3500(0.70/12)=204 cf Amin= 12Vdesign/(TxKdesign); T=drawdown time=96 hr Amin=(204*12)/(96*0.30)=85 s.f. PA2022-0306 Priority Project Water Quality Management Plan (WQMP) Antoci’s Residence 2286 Channel Rd Section IV North OC Priority WQMP Template August 17 2011 Page 18 Vstorage=181/n=181/0.5=362 cf Bottom area of trench = 5x15 = 75 s.f. Side area of trench = 15x5 = 75 s.f. Area provided= 75 + 75 = 150 s.f.>>85 s.f. Depth of storage=362 cf/75 s.f. = 4.82’ Depth provided =4+1=5.0’>>4.82’ IV.3.3 Evapotranspiration, Rainwater Harvesting BMPs If the full Design Storm Capture Volume cannot be met with infiltration BMPs, describe any evapotranspiration and/or rainwater harvesting BMPs included. 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 Storm Capture Volume can be met with evapotranspiration and/or rainwater harvesting BMPs in combination with infiltration BMPs. If not, document below 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 these BMP categories. PA2022-0306 Priority Project Water Quality Management Plan (WQMP) Antoci’s Residence 2286 Channel Rd Section IV North OC Priority WQMP Template August 17 2011 Page 19 Not Applicable. 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 included. 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: PA2022-0306 Priority Project Water Quality Management Plan (WQMP) Antoci’s Residence 2286 Channel Rd Section IV North OC Priority WQMP Template August 17 2011 Page 20 Show calculations below to demonstrate if the LID Design Storm 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 these BMP categories. Not Applicable. IV.3.5 Hydromodification Control BMPs Hydromodification Control BMPs BMP Name BMP Description N/A PA2022-0306 Priority Project Water Quality Management Plan (WQMP) Antoci’s Residence 2286 Channel Rd Section IV North OC Priority WQMP Template August 17 2011 Page 21 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. Regional/Sub-Regional LID BMPs Not Available IV.3.7 Treatment Control BMPs Treatment Control BMPs BMP Name BMP Description PA2022-0306 Priority Project Water Quality Management Plan (WQMP) Antoci’s Residence 2286 Channel Rd Section IV North OC Priority WQMP Template August 17 2011 Page 22 IV.3.8 Non-structural Source Control BMPs Non-Structural Source Control BMPs Identifier Name Check One If not applicable, state brief reason Included Not Applicable N1 Education for Property Owners, Tenants and Occupants N2 Activity Restrictions N3 Common Area Landscape Management This is a residential development N4 BMP Maintenance N5 Title 22 CCR Compliance (How development will comply) This is a residential development N6 Local Industrial Permit Compliance This is a residential development N7 Spill Contingency Plan This is a residential development N8 Underground Storage Tank Compliance This is a residential development N9 Hazardous Materials Disclosure Compliance This is a residential development N10 Uniform Fire Code Implementation N11 Common Area Litter Control This is a residential development N12 Employee Training This is a residential development N13 Housekeeping of Loading Docks This is a residential development N14 Common Area Catch Basin Inspection This is a residential development N15 Street Sweeping Private Streets and Parking Lots This is a residential development N16 Retail Gasoline Outlets This is a residential development N1. Education for Property Owners, Tenants and Occupants PA2022-0306 Priority Project Water Quality Management Plan (WQMP) Antoci’s Residence 2286 Channel Rd Section IV North OC Priority WQMP Template August 17 2011 Page 23 Educational handouts will be prepared and given to property owner, Mathew Naehring, for his file and reference. Property will share these materials with others in his family. N2. Activity Restriction Some activities, such as painting, oil change, hazardous material use, etc., will be restricted on site and covered in the educational handouts. Property owner’s family shall be made aware of these restrictions. N4. BMP Maintenance Owner or his maintenance contractor will be responsible for BMP inspection and maintenance activities. The criteria for maintenance repair or replacement, including frequency and responsibility, are shown in Section V. The owner shall also create his inspection log sheets in order to document BMP maintenance activities. N10. Uniform Fire Code Implementation The discharge of any waste liquid containing crude petroleum or its products “into or upon” any drainage canal or ditch, storm drain, sewer, or upon the ground within the site is prohibited. PA2022-0306 Priority Project Water Quality Management Plan (WQMP) Antoci’s Residence 2286 Channel Rd Section IV North OC Priority WQMP Template August 17 2011 Page 24 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 storm drains inlets present near the site S2 Design and construct outdoor material storage areas to reduce pollution introduction This is a residential lot. S3 Design and construct trash and waste storage areas to reduce pollution introduction This is a residential lot. S4 Use efficient irrigation systems & landscape design, water conservation, smart controllers, and source control S5 Protect slopes and channels and provide energy dissipation No slopes & channel present near the site Incorporate requirements applicable to individual priority project categories (from SDRWQCB NPDES Permit) S6 Dock areas This is a residential lot. S7 Maintenance bays This is a residential lot. S8 Vehicle wash areas This is a residential lot. S9 Outdoor processing areas This is a residential lot. S10 Equipment wash areas This is a residential lot. S11 Fueling areas This is a residential lot. S12 Hillside landscaping This is a residential lot. S13 Wash water control for food preparation areas This is a residential lot. S14 Community car wash racks This is a residential lot. S4. Use efficient irrigation systems & landscape design, water conservation, smart controllers, and source control The proposed irrigation systems are designed to meet each landscape area’s specific water requirement. The owner or his maintenance staff will adjust the timing and application methods of irrigation water, when needed, to minimize the runoff of excess irrigation water into the municipal storm drain system. PA2022-0306 Priority Project Water Quality Management Plan (WQMP) Antoci’s Residence 2286 Channel Rd Section IV North OC Priority WQMP Template August 17 2011 Page 25 IV.4 Alternative Compliance Plan (If Applicable) Describe an alternative compliance plan (if applicable). Include alternative compliance obligations (i.e., gallons, pounds) and describe proposed alternative compliance measures IV.4.1 Water Quality Credits Determine if water quality credits are applicable for the project. Description of Proposed Project Project Types that Qualify for Water Quality Credits (Select all that apply): Redevelopment projects that reduce the overall impervious footprint of the project site. Brownfield redevelopment, meaning redevelopment, expansion, or reuse of real property which may be complicated by the presence or potential presence of hazardous substances, pollutants or contaminants, and which have the potential to contribute to adverse ground or surface WQ if not redeveloped. Higher density development projects which include two distinct categories (credits can only be taken for one category): those with more than seven units per acre of development (lower credit allowance); vertical density developments, for example, those with a Floor to Area Ratio (FAR) of 2 or those having more than 18 units per acre (greater credit allowance). Mixed use development, such as a combination of residential, commercial, industrial, office, institutional, or other land uses which incorporate design principles that can demonstrate environmental benefits that would not be realized through single use projects (e.g. reduced vehicle trip traffic with the potential to reduce sources of water or air pollution). Transit-oriented developments, such as a mixed use residential or commercial area designed to maximize access to public transportation; similar to above criterion, but where the development center is within one half mile of a mass transit center (e.g. bus, rail, light rail or commuter train station). Such projects would not be able to take credit for both categories, but may have greater credit assigned Redevelopment projects in an established historic district, historic preservation area, or similar significant city area including core City Center areas (to be defined through mapping). Developments with dedication of undeveloped portions to parks, preservation areas and other pervious uses. Developments in a city center area. Developments in historic districts or historic preservation areas. Live-work developments, a variety of developments designed to support residential and vocational needs together – similar to criteria to mixed use development; would not be able to take credit for both categories. In-fill projects, the conversion of empty lots and other underused spaces into more beneficially used spaces, such as residential or commercial areas. Calculation of Water Quality Credits (if applicable) Not Applicable PA2022-0306 Priority Project Water Quality Management Plan (WQMP) Antoci’s Residence 2286 Channel Rd Section IV North OC Priority WQMP Template August 17 2011 Page 26 IV.4.2 Alternative Compliance Plan Information Not Applicable Section V Inspection/Maintenance Responsibility for BMPs BMP Inspection/Maintenance BMP Reponsible Party(s) Inspection/ Maintenance Activities Required Minimum Frequency of Activities Flogard Filter Property owner Check for any clogging & remove any sediment deposit, debris, mulch & trash. Trim Vegetation Two times a year minimum or before each major storm event if occurs frequently. 6 to 12 months PA2022-0306 Priority Project Water Quality Management Plan (WQMP) Antoci’s Residence 2286 Channel Rd Section VI North OC Priority WQMP Template August 17 2011 Page 27 Section VI BMP Exhibit (Site Plan) VI.1 BMP Exhibit (Site Plan) VI.2 Submittal and Recordation of Water Quality Management Plan Following approval of the Final Project-Specific WQMP, three copies of the approved WQMP (including BMP Exhibit, Operations and Maintenance (O&M) Plan, and Appendices) shall be submitted. In addition, these documents shall be submitted in a PDF format. Each approved WQMP (including BMP Exhibit, Operations and Maintenance (O&M) Plan, and Appendices) shall be recorded in the Orange County Clerk-Recorder’s Office, prior to close-out of grading and/or building permit. Educational Materials are not required to be included. PA2022-0306 PA2022-0306 PA2022-0306 PA2022-0306 Priority Project Water Quality Management Plan (WQMP) Antoci’s Residence 2286 Channel Rd Section VII North OC Priority WQMP Template August 17 2011 Page 28 Section VII Educational Materials Refer to the Orange County Stormwater Program (ocwatersheds.com) for a library of materials available. Please only attach the educational materials specifically applicable to this project. Other materials specific to the project may be included as well and must be attached. Education Materials Residential Material (http://www.ocwatersheds.com) Check If Applicable Business Material (http://www.ocwatersheds.com) Check If Applicable The Ocean Begins at Your Front Door Tips for the Automotive Industry Tips for Car Wash Fund-raisers Tips for Using Concrete and Mortar Tips for the Home Mechanic Tips for the Food Service Industry Homeowners Guide for Sustainable Water Use Proper Maintenance Practices for Your Business Household Tips Other Material Check If Attached Proper Disposal of Household Hazardous Waste Recycle at Your Local Used Oil Collection Center (North County) Recycle at Your Local Used Oil Collection Center (Central County) Recycle at Your Local Used Oil Collection Center (South County) Tips for Maintaining a Septic Tank System Responsible Pest Control Sewer Spill Tips for the Home Improvement Projects Tips for Horse Care Tips for Landscaping and Gardening Tips for Pet Care Tips for Pool Maintenance Tips for Residential Pool, Landscape and Hardscape Drains Tips for Projects Using Paint PA2022-0306