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19 January 1996 AGE-NC Project No. 95-0118 Page 2 of 5 S(A samples will be collected at five-foot intervals beginning at 10 feet bsg in each boring. Samples will be collected using a California split-spoon sampler and brass sleeves. The sampler will be driven by dropping a 140-pound weight from a height of 30 inches. The number of blows required to drive each 6-inch length of the sampler (blow counts) are to be recorded on the boring logs by an AGE staff geologist. Upon sample retrieval, the middle brass sleeve will be removed from the sampler. The ends of the sleeve will be immediately covered with Teflon tape or aluminum sheets, sealed with plastic end caps, secured with tape and immediately placed in a chilled container for transportation to a State-certified laboratory. Each sample sleeve will be labeled with the following: boring location, depth, time, date and sampler's initials. 3.2. EQUIPMENT DECONTAMINATION All sampling tools and brass sleeves used for sample collection will be thoroughly rinsed with clean water after washing with a solution of Alconox. All hollow stem augers are steam-cleaned prior to advancement in each borehole. 3.3. LABORATORY ANALYSIS Selected soil samples will be analyzed for TPH-g and BTE&X in accordance with EPA methods 8015m and 8020, respectively. Laboratory reports, 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. At least one sample will be transmitted to Mr. Keith Kaufman, M.S., an independent microbiologist, and analyzed for physicochemical properties and microbiological enumeration. Data from these analysis will be used to determine the soils indigenous bacterial populations ability to support microbiological degradation of petroleum hydrocarbons. 3.4. SOIL VAPOR EXTRACTION/IN-SITU AIR SPARGING TEST To detemtine the feasibility of remedial options at the site, AGE will perform an SVE/IAS pilot test. The SVE pilot test will be conducted for an eight-hour period at the site; the duration of the IAS pilot test will be approximately 96-hours (4 days). For the SVE test, an internal-combustion unit will be used to apply a vacuum to one extraction well. The induced vacuum will be measured at a second SVE well and several monitoring wells throughout the site. Soil vapor concentrations from the extraction well will be measured throughout the pilot test. Four soil vapor samples will also be collected during the pilot test and submitted to a laboratory for analysis.