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t s <br /> 475 14th Street,Suite 400 <br /> Geosptecll' Oakland,California 94612 <br /> PH 510.836.3034 <br /> FAX 510.836.3036 <br /> consultants www.geosyntec.corn <br /> 1 February 2011 <br /> Mr. Siddarth Sewalia <br /> California Regional Water Quality Control Board <br /> Central Valley Region <br /> 11020 Sun Center Drive 4200 <br /> Rancho Cordova, California 95670-6114 <br /> Subject: Off-Site Soil Gas Sampling Work Plan <br /> John Taylor Fertilizers Co. <br /> Stockton,California Facility <br /> Dear Mr. Sewalia: <br /> This letter comprises an Off-Site Soil Gas Sampling Work Plan (Work Plan) for the former John <br /> Taylor Fertilizers Co. (JTF) facility, located at 1819 South Argonaut Street in Stockton, <br /> California(the"Site"). JTF is a wholly-owned subsidiary of the Wilbur-Ellis Company (Wilbur- <br /> Ellis). This Work Plan was prepared by Geosyntec Consultants, Inc. (Geosyntec) on behalf of <br /> JTF/Wilbur-Ellis. A Site location map is provided as Figure 1. <br /> In a meeting between JTF/Wilbur-Ellis, Geosyntec, and the California Regional Water Quality <br /> Control Board, Central Valley Region (RWQCB) on 27 January 2011, the RWQCB requested <br /> soil gas sampling at the two locations shown in the attached Figure 2. This Work Plan details the <br /> procedures for collecting and analyzing these samples. <br /> SOIL GAS SAMPLING AND ANALYSIS PROCEDURES <br /> Pre-Sampling Activities <br /> Prior to sampling,the following activities will be performed: <br /> • Geosyntec will obtain boring permits from the San Joaquin County Environmental Health <br /> Department(the County); <br /> P:\PRJ2003REM\Wilbur-Ellis\Wr0250(JTF)\STOCKTON\S1.P Vapor Sampling\Work Plan\JTF Stockton Off-Site Soil Gas Sampling Work Plan.docx <br /> engineers I scientists I innovators <br />