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• ' 30 December 1998 • AGE-NC Project No 95-0173 ' Page 5 of 12 I32 INSTALLATION OF REMEDIATION WELLS An SVE system in conjunction with an IAS system is proposed to reduce petroleum hydrocarbon ' mass within the "core" petroleum hydrocarbon-impacted area at the site In order to maximize the efficiency of the clean-up efforts,a 24-hour operation of the system is planned A typical destruction rate of greater than 95%of hydrocarbon vapors is expected throughout the entire cleanup duration ' Five additional SVE wells and five additional IAS wells will be installed at the site to supplement remediation efforts of the "core" petroleum hydrocarbon impacted area at the site Proposed SVE well locations are illustrated in Figure 3, proposed IAS well locations are illustrated in Figure 4 Based on an estimated SVE radius of influence of 28 feet (Corrective Action Plan, dated 05 May r1998), AGE proposes installation of five SVE wells in the following locations I • approximately 5 to 15 feet east of MW-1, • approximately 5 to 15 feet north of MW-2, approximately 30 to 40 feet south of MW-3, • approximately 20 to 30 feet east of MW-3, and • approximately 25 to 35 feet northeast of MW-3 Based on an estimated IAS radius of influence of 20 feet (Corrective Action Plan, dated 05 May 1998) and the existing and proposed SVE well locations, AGE proposes installation of five IAS wells in the following locations • approximately 20 to 30 feet northeast of MW-1, • approximately 25 to 35 feet southeast of MW-1, • approximately 20 to 30 feet northeast of MW-2, • approximately 20 to 30 feet south of MW-3, and • approximately 25 to 35 feet east of MW-3 33 INSTALLATION OF SOIL VAPOR EXTRACTION/AIR SPARGE PIPING SYSTEM Two-inch diameter, schedule 40 PVC piping will be installed approximately one foot bsg and routed from the SVE well heads to the vapor extraction unit, one-inch diameter, schedule 40 PVC piping Adtnnced Ge0En%iron mental,Inc