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ENVIRONMENTAL HEALTH DEPARTMENT <br />Donna K. Heran, R.E.H.S. <br />Director <br />Al Olsen, R.E.H.S. <br />Program Manager <br />Laurie A. Cotulla, R.E.H.S. <br />Program Manager <br />SAN JOAQUIN COUNTY <br />304 East Weber Avenue, Third Floor <br />Stockton, California 95202-2708 <br />Telephone: (209) 468-3420 <br />Fax: (209) 464-0138 <br />Unit Supervisors <br />Carl Borgman, R.E.H.S. <br />Mike Huggins, R.E.H.S., R.D.I. <br />Douglas W. Wilson, R.E.H.S. <br />Margaret Lagorio, R.E.H.S. <br />Robert McClellon, R.E.H.S. <br />Mark Barcellos, R.E.H.S. <br />SHELDON HECKMAN / CONNELL MOTORS <br /> FILE COPY <br />PO BOX 8467 <br />STOCKTON CA 95202 <br />RE: River City Petroleum Inc. Site Code#:1304 <br />2211 N. Wilson Way RO#:00447 <br />Stockton, CA., 95205 CUF#: 14483 <br />WORK PLAN: "Phase 4 Work Plan for Vertical and Horizontal Delineation <br />of Plume - Five CPTs and Two Monitoring Wells." <br />DATED: November 14, 2002. <br />PREPARED BY: Foothill Engineering - Ervin Rifenburg, P.E. <br />STATUS: Approved, (with conditions noted in comments below) <br />ADEQUATE AND NECESSARY ELEMENTS OF THE WORK PLAN [H&S <br />25299.37, subd(c)(3)]: <br />Install 5 CPTs to -130' bgs to define vertical and lateral extent of <br />groundwater plume and determine new monitoring well screen <br />placement and, <br />Install one, two-casing, 1"each, PVC 'nested' monitoring well (MW- <br />10S) with a shallow 20' screen (40'-60' bgs) and one deep, 5' <br />screened, (95'-100' bgs) monitoring well (MW-10D) and, <br />Install one, single-casing, deep, 5'-screened, (95'-100' bgs) 2" PVC <br />monitoring well (MW-1D) and <br />Collect soil and groundwater samples and analyze each for TPH as <br />Gasoline and Diesel, BTEX, 1,2-DCA, EDB, and five (5) Oxygenates <br />and, <br />Develop, survey and add new wells to existing quarterly monitoring <br />schedule and, <br />Submit a report of findings to EHD. <br />COMMENTS AND CONDITIONS: <br />This proposal should be conducted in two phases. CPT data <br />collection and evaluation in Phase I. Phase ll to cover the <br />monitoring well installations.