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17 April 2006 <br /> AGE-NC Project No. 04-1207 <br /> Page 3 of 9 <br /> • One boring will be advanced approximately 7 feet west of well MW-1 to assess the lateral <br /> extent of petroleum hydrocarbon contamination west of the former UST location; <br /> • A second boring will be advanced approximately 38 feet east of well MW-1 to assess the <br /> lateral extent of petroleum hydrocarbon contamination east of the former UST location;and <br /> • A third boring will be advanced adjacent to well MW-1 to define the vertical extent of <br /> contamination beneath the former UST location. <br /> The borings will be advanced to approximately 65 feet bsg. Total depths of the borings may vary <br /> according to hydrogeologic conditions encountered during drilling activities. <br /> First-encountered ground water and selected soil samples will be analyzed by a California <br /> Department of Health Services(DHS)-certified laboratory for: <br /> • Total petroleum hydrocarbons quantified as gasoline(TPH-g) in accordance with EPA <br /> Method 8015M; and <br /> • Benzene,toluene,ethylbenzene,and total xylenes(BTEX)and fuel additives methyl tertiary- <br /> butyl ether(MTBE),tertiary-butyl alcohol(TBA),di-isopropyl ether(DIPE),ethyl tertiary- <br /> butyl ether(ETBE),tertiary-amyl methyl ether(TAME), 1,2-dibromoethane(EDB),and 1,2- <br /> dichloroethane (1,2-DCA) in accordance with EPA Method 8260B. <br /> 3.3. SVE WELL INSTALLATION <br /> One SVE well will be installed at the site, near monitoring well MW-1, to be used in the <br /> performance of an 8-hour SVE pilot test. The results of the pilot test will be used to determine the <br /> number and placement of additional SVE wells, if needed, for the final design of the remediation <br /> system at the site. The proposed well location is illustrated on Figure 2. <br /> The proposed SVE well boring will be advanced to a total depth of approximately 50 feet bsg <br /> utilizing a truck-mounted, hollow stem drill rig equipped with 8.25-inch diameter hollow-stem <br /> augers.Total depth of the boring may vary according to site conditions encountered during drilling. <br /> The SVE well will be screened from approximately 10 feet to 50 feet bsg. Field procedures for the <br /> installation of the SVE well are presented in Section 4.2.. <br /> 3.4. SVE PILOT TEST AND RESULTS <br /> An 8-hour SVE pilot test will be conducted at the site. The SVE pilot test will be performed to <br /> Advanced GeoEnvironmental,Inc. <br />