Laserfiche WebLink
F�� Plan to Excavate Gasoline Tank Cavity December 10, 1090 <br /> ARCO Service Station No. 6020, Manteca, California AGS 30055-2W <br /> from the base of the tanks to the ground surface. The conductor casing will be driven <br /> approximately 2 feet into native soil and then surrounded by clean pea gravel backfill. <br /> Twelve-inch-diameter polyvinyl chloride pipe will be used for conductor casing. The <br /> conductor casing will allow soil borings to be drilled between the new tanks to continue <br /> further investigation of soil conditions beneath the tanks. Vapor-recovery wells could be <br /> installed in these borings if remediation of soil is warranted. <br /> LABORATORY ANALYSES <br /> l.., Soil samples collected from the bottom of the existing and proposed tank cavities will be <br /> submitted to a State-certified laboratory for analysis of TPHg by Environmental Protection <br /> Agency (EPA) preparation Method 5030 and modUied EPA Method 8015; and BTEX by <br /> EPA preparation Method 5030 and EPA Method 8020. Soil samples collected from under <br /> the former leaded gasoline tank will be submittedfor total and prg is-lead. Laboratory <br /> 4 results will be discussed with ARCO personnel and with ARCO's approval forwarded to the <br /> SJPHS. A copy of a signed Authorization to Release Analytical Data form i:, included in <br /> Appendix C of this work plan. The new tanks wili be installed after the SJPHS receives the <br /> laboratory reports and approves tank installation. <br /> 14 <br />