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September 16, 1991 <br /> ARCO Service Station No. 2076, Lodi. California clean pea gravel 6ackfilf. <br /> ded <br /> approximately 2 feet into native soil and then suI be use by, <br /> Twelve-inch-diameter polyvinyl chloride pipe will be used for conductor casing- The <br /> conductor casing will allow soil borings to be drifted betweenec inue <br /> ssarv. tanks psoroextratction <br /> further investigation of soil conditions beneath the tanks if n <br /> be installed in these borings if remediation of soil is warranted. If residual <br /> wells could appropriate <br /> hydrocarbons are present in coif in the former or new product-line trenches, a prop <br /> subgrade piping will be installed for use in a vapor-extraction system. <br /> s� <br /> I.00RATORY ANALYSES <br /> les collected from the bottom of the existing and proposed tank cavities and <br /> Soi. samped les for analysis of TPH9 <br /> product line trenches will be submitted to modified EPA'Method 8015 and BTEY by EPA <br /> by EPA preparation Method 5030 and mtank will be <br /> i4lethod 8020. Soil Samples collected from under the former leadb0 Laboratory <br /> results will be <br /> submitted for analysis of total lead and dibromethane (ED a1 forwarded to the SJCPHS <br /> discussed with ARCO personnel and with ARCO's app <br /> rization to Release Analytical Data farm is included in <br /> E <br /> Hl], A copy of a signed Autho <br /> t.ppenciix F of this work plan. <br /> OBTAINING APPROVAL FOR TANK INSTALLATION <br /> showing sample Vocations will be <br /> With ARCO's app <br /> sa roval, laboratory results and a map g <br /> provided to the SJCPHS-EHD to expedite (1) the installation of the new underground <br /> and product Vines,(2)the backfilling of the former tank cavity with stockpiled <br /> storage tanks P <br /> y soil, and (3) the installation of piping for a VES. The layout of the VES will be base an <br /> results of our July 1991 VET. "Mese tasks will be conducted after the SJCPHS-EID <br /> receives the laboratory reports and approves the work. <br /> `_. 14 <br />