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Job No. 9815012 <br />June 11, 1998 <br />Page 4 <br />Sampling personnel were responsible for the protection and custody of the samples until they <br />were relinquished. When samples custody was transferred, the respective individuals relinquishing <br />and receiving the samples signed, dated, and recorded the time on the chain -of -custody form. <br />. 1 1 ZrAKICKII <br />As recommended by Mr. McClellon, the collected soil samples were analyzed for Total Petroleum <br />Hydrocarbons as Gasoline (TPH-G) and est Method EPA 8260 (Oxygenates) hydrocarbon <br />constituents Benzene, Toluene, Ethylbenzene and Total Xylenes (BTEX) and Methyl -t -Butyl <br />Ether (MTBE). Chemical analyses data are attached to this report. The data indicate that <br />Oxygenates constituents were not detected in the soil samples analyzed. The data further indicate <br />that among the hydrocarbon constituents of concern were detected only in the soil sample S-1 <br />collected from a depth of 3 feet beneath the former location of Dispenser D-1. Concentration of <br />the constituents of concern in this soil sample was reported as follows: Benzene @ 4.2 mg/Kg <br />Ethylebenzene @ 9.5 mg/Kg, Toluene @ 8.8 mg/Kg, Total Xylenes @ 110 mg/Kg and TPH-G @ <br />1900 mg/Kg. <br />. V . 1 <br />The USTs backfill soil was excavated and West Star prior to arrival of ASR to the site had <br />exposed the USTs. Subsurface soils, to the excavated depth of about 12 feet, predominantly <br />comprise tan and gray clayey sand. The soils below a depth of about 5 feet were moderately <br />cemented (hardpan). Visual observations revealed indications of hydrocarbon impairment beneath <br />the dispensers. No significant hydrocarbon odor or discolored soils were detected within the <br />USTs excavation. The USTs appeared to be in good condition. Minor rusting was apparent on <br />their exterior surfaces. <br />This report has been prepared in accordance withthe generally accepted standards of <br />environmental practice m the area at the time the US I s excavation was performed. No soil <br />engineering or environmental implications are stated or should be inferred. Evaluation of the <br />conditions at the site is made from a limited sampling points. Subsurface conditions may vary <br />away from the sampling locations. The report does not reflect variation away from the sampling <br />points. <br />ASR En&mring <br />