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21 November 1997 AGE-NC Project No 97-0312 Page 2 of 4 22 SOIL SAMPLE COLLECTION Soil samples were collected from approximately two feet beneath the product piping on 18 September 1997 (P-1 through P-8) Samples were collected from approximately two feet beneath the bottom of the UST locations on 19 September 1997 On 22 September 1997, additional samples were collected at total depths of 4 to 6 5 feet below surface grade(bsg) at the dispenser locations (P- 9 through P-13) and at a total depth of 17 feet bsg at the location of UST No 6 (T6-17) Sample locations were approved by the PHS-EHD Sample locations are illustrated on Figure 2. The soil samples were collected in pre-cleaned 2-inch by 3-inch brass sleeves Piping samples P-2 through P-8 and samples collected from the UST excavation were collected from the excavator bucket Piping samples P-I and P-9 through P-13 were collected using a metric soil sampler. The ends of each brass sleeve were covered with Teflon sheets, capped and sealed with tape The samples were then labeled, stored on ice and transported under chain-of-custody to McCampbelI Analytical Inc (MAI), a state-certified laboratory 23 SAMPLE ANALYSIS A total of nine UST samples and thirteen piping/dispenser samples were collected and analyzed for total petroleum hydrocarbons quantified as gasoline and diesel (TPH-g, TPH-d) in accordance with EPA Method 8015m, and for volatile aromatic compounds (benzene, toluene, ethylbenzene and xylenes, BTE&X) with methyl tertiary-butyl ether(MTBE) in accordance with EPA Method 8020 Four UST and four piping/dispenser samples were also analyzed for volatile organic compounds with oxygenated compounds in accordance with EPA Method 8260 3.0. FINDINGS 3 1 UST REMOVAL UST Nos I through 5 appeared to be in good condition upon removal A hole was observed on the bottom of UST No 6, beneath the fill port Obvious field indications of hydrocarbon-impacted soil were observed in the soil immediately surrounding the USTs and product piping 3 2 ANALYTICAL RESULTS OF UST AND PIPING REMOVAL SAMPLES TPH-g and TPH-d were detected in the samples collected beneath the USTs at concentrations as high as 2,500 parts per million(ppm,reported as milligrams per kilogram) and 32,000 ppm, respectively Advanced GeoEmironmeninl,Inc.