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Eovuno o1r <br /> 0.ORN JR. <br /> M-�.nn RM .'a <br /> Water Boards an»»`»•PI non-Tenn» <br /> Central Valley Regional Water Quality Control Board <br /> 24 October 2012 <br /> Mr. Dave Isola , <br /> Isola &Associates <br /> 405 West Pine Street <br /> Lodi, CA 95240-2023 <br /> NOTICE OF APPLICABILITY OF GENERAL ORDER R5-2008-0149-041, FORMER RIPON <br /> FARM SERVICE, 928 FRONTAGE ROAD, SAN JOAQUIN COUNTY <br /> Ripon Farm Service submitted a Treatability Study Work Plan (Work Plan) dated 10 May 2012, <br /> and the 16 August 2012 Revised Figure 10 and Contingency Plan Commitment to California <br /> Regional Water Quality Control Board, Central Valley Region (Central Valley Water Board) staff. <br /> This Work Plan includes a proposal to biologically reduce nitrate in soil and groundwater <br /> through the injection of amendments into groundwater. The Work Plan also includes a Notice of <br /> Intent, which requests enrollment in General Order No. R5-2008-0149, General Waste <br /> Discharge Requirements for In-situ Groundwater Remediation at Sites with Volatile Organic <br /> Compounds, Nitrogen Compounds, Perchlorate, Pesticides, Semi-Volatile Compounds and/or <br /> Petroleum Compounds (General Order). Based on information in your submittal, it is our staff's <br /> determination that this project meets the required conditions to be approved under General <br /> Order No. R5-2008-0149. All of the requirements contained in the General Order and those <br /> listed in the General Information section below are applicable to your project. You are assigned <br /> Order No. R5-2008-0149-041. <br /> Project Location: <br /> The project is in San Joaquin County, Township 25S, Range 8E, Section 19, Mount Diablo <br /> Baseline & Meridian; Assessor's Parcel Number 261-002-007; Latitude 37.75 degrees N, <br /> Longitude 121.14 degrees W. <br /> Project Description: <br /> Ripon Farm Service is removing nitrogen from groundwater that resulted from historic <br /> operations. The project will promote reducing conditions in groundwater in a pilot study <br /> application area. The reducing conditions will biologically convert nitrate to dinitrogen gas, <br /> thereby removing it from groundwater. Ripon Farm Service will add the proprietary carbon- <br /> based product, EHC®Carbon-Only, to shallow groundwater at three locations on the property. <br /> One location is near former boring B-34, which will be a single injection point adjacent to three <br /> temporary monitoring points that will be used to determine the subsurface radius of distribution. <br /> The second and third locations will be four injection points around MW-103, and four injection <br /> points around MW-104, which are near the center of the nitrogen pollution. <br /> In the 16 August 2011 letter, Ripon Farm Service committed to preparing a contingency plan <br /> within 30 days of a request from Central Valley Water Board staff. The contingency plan will be <br /> KARL E. LONOLEV Soo, P.E.,DRAIR I PAMELA C.CREEDON P.E.. BCEE.EXECOTNE OFFICER <br /> 11020 Sun Cantor ONve*200.Rancho Cordova.CA 958]0 I www watorbcarOs.cagov/con,ralval ay <br /> 4i n cc,n n. cn <br />