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Mr. George Takemori Project 201790-002.007 <br /> May 11, 1999 <br /> Page 4 <br /> Dispenser and Product Eine Sample Results <br /> MTBE was detected in dispenser samples DS-1 and DS-2 at concentrations of 23 ppm <br /> and 28 ppm, respectively. All other parameters (TPHG, TPHD, BTEX, and fuel <br /> oxygenates TBA, DIPS, ETBE, TAME) were below method detection limits for the <br /> dispenser and product line samples analyzed. <br /> Based on the concentrations of MTBE in the two dispenser samples, additional soil <br /> excavation was performed at the dispenser island and two more samples (D-1 and D-2) <br /> were collected. The two additional samples were analyzed for MTBE. MTBE was not <br /> detected above the method detection limit in either sample. <br /> Stockpiled Soil Sample Results <br /> TPHD was detected in all stockpiled soil samples. Concentrations of TPHD ranged from <br /> 12 ppm to 820 ppm. TPHG was detected in seven of the twelve samples tested. <br /> Concentrations ranged from 1 ppm to 5 ppm. <br /> BTEX was not detected above the method detection limits in any of the stockpiled soil <br /> samples. <br /> No fuel oxygenates were detected in any of the samples except for MTBE in sample <br /> SP-10 and SP-11 at concentrations of 20 ppm and 18 ppm, respectively. <br /> CONCLUSIONS <br /> Laboratory analysis of soil samples from beneath UST tanks #5, #6, #8, the fuel <br /> dispensers, and product lines indicate that there are no detectable levels of TPHG, <br /> TPHD, BTEX, or fuel oxygenates remaining in these areas. The UST and associated <br /> excavations were backfilled with clean pea gravel following receipt of the confirmation <br /> soil sample analytical results. <br /> i <br /> C":ITEICHERTISTOCKTONIREPO RTS\STKNP 101.DOC-99Usg:1 <br /> 1,ev 0,5111 r <br />