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HE <br /> ENVIRONMENTAL ALTHEPARTMENT-h <br /> SAN JOAQUIN COUNTY <br /> .0 Unit Supervisors <br /> Donna K.Heran,R.E.H.S. Carl Borgman,R.E.H.S. <br /> 304 East Weber Avenue, Third Floor <br /> Director Mike Huggins,R.E.H.S.,R.D.I. <br /> Al Olsen,R.E.H.S. Stockton, California 95202-2708 Douglas W.Wilson,R.E.H.S. <br /> Program Manager Telephone: (209) 468-3420 Margaret Lagorio,R.E.H.S. <br /> o Laurie A.Cotuila,R.E.H.S. Fax: (209) 464-0138 Robert McClellon,R.E.H.S. <br /> Program Manager Mark Barcellos,R.E.H.S. <br /> DAVID ATWATER <br /> VAN DE POL ENTERPRISES <br /> P 0 BOX 1107 <br /> STOCKTON CA 95201 <br /> RE: CALIFORNIA FUELS STATION CODE: 1214 <br /> 2402 PACIFIC AVENUE <br /> STOCKTON CA 95204 <br /> WORKPLAN: Revisions to Work Plan Addendum April-29,-2002 <br /> DATED: November 6, 2002 <br /> PREPARED BY: Advanced GeoEnvirontnental, Inc. (AGE).. <br /> APPROVED 9 with Conditions (See Below) <br /> DISAPPROVED n <br /> ADDENDUM 0 Submit by <br /> ADEQUATE AND NECESSARY ELEMENTS OF THE WORKPLAN (H&S <br /> 25299.37,subd.(c)(3),): <br /> 1) Install a ground water extraction well screened between 40 feet and 65 feet bsg, <br /> instead of from 38 to 65 feet bsg as previously proposed. <br /> 2) Conduct a 48-hour aquifer pumping test including a 24-hour step draw-down test <br /> and a 24-hour constant rate pumping test to evaluate the radius of influence for the <br /> proposed groundwater extraction system. <br /> COMMENTS AND CONDITIONS: <br /> 1) Schedule work with PHS/EHD before scheduling work with C-57 contractor. <br /> 2) Implement work by January 15, 2003. <br /> 3) Submit appropriate fee and well application permit. <br /> 4) Additional work to address the lateral extent of the groundwater contamination to <br /> the north toward MW-6, cast toward the apartment complex, and northwest toward <br /> MW-4 may be required based on the result of the pumping test. <br /> REASONS FOR DISAPPROVAL OF THE WORKPLAN (H&S 25299.37, <br /> subd.(C)(3).): <br /> None <br /> DATED November 18, 2002 BY <br /> Cc: CRWQCB, Central-Valley Region—Marty Hartzell <br /> Cc: AGE—Tim Cuellar <br />