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07 April 1997 AGE-NC-95-0103 Page 2 of 5 six IAS injection points around the existing IAS well. Proposed well locations are illustrated on Figure 2. The monitoring well and SVE well will be installed using a truck-mounted drill rig and hollow stem augers. Soil samples will be collected at five-foot intervals and preserved for possible analysis. The IAS points will be installed using a van-mounted Geoprobe probing unit. Soil samples will not be collected during probing. 2.2. EQUIPMENT DECONTAMINATION All augers and soil probe rods will be steam-cleaned or thoroughly washed with a solution of Alconox, and triple rinsed with clean water prior to advancement. Furthermore, all sampling tools will be washed with a solution of Alconox, and triple rinsed with clean water prior to sample collection. 2.3. LABORATORY ANALYSIS Selected soil samples will be analyzed for total petroleum hydrocarbon quantified as gasoline(TPF-1- g), volatile aromatics (benzene, toluene, ethylbenzene and xylenes: BTE&X) and methyl-tertiary butyl ether(MTBE) in accordance with EPA methods 8015m and 8020/602. Laboratory reports of both soil and ground water analysis, testing methods, laboratory quality assurance/quality control (QA/QC) reports and sample chain-of-custody documentation will be presented in a report with the findings and recommendations. 3.0. PROCEDURES 3.1. DRILLING AND SAMPLING The following procedures will be performed for the installation of six sparging points and additional wells: 1. Notify the PHS-EHD at least 48 hours prior to the commencement of any work. 2. Advance two soil borings using a truck-mounted drill rig equipped with eight-inch, hollow- stem augers. The boring for the installation of the ground water monitoring well shall be advanced to a depth of approximately 30 feet. The boring for the installation of the soil vapor extraction well shall be advanced to a depth of approximately 15 feet.