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r, Mr. Michael Infuma 1 <br /> January 12, 2000 <br /> Page 3 of 4 ; <br /> approximately 6-9 feet bgs in the area of investigation. Soil-encountered beneath the fill material ` <br /> generally consisted of elastic silt from approximately 9 to 15 feet bgs, poorly graded sand from <br /> approximately 15 to 21124 feet bgs, and well graded sand from approximately 21124 to 26 feet <br /> bgs, the maximum depth explored. Groundwater was not encountered in either boring. <br /> No petroleum odors or discoloration were noted in samples Collected from the borings. The FID <br /> reading from each sample interval was zero. Soil boring logs are included in Attachment A. <br /> i <br /> i 4.2 Laboratory Analysis i <br /> Samples were analyzed for benzene, toluene, ethylbenzene, Xylenes (BTEX), and methyl tert butyl <br /> ether (MTBE) using EPA method 8020, and total petroleum hydrocarbons as diesel (TPHd) <br /> utilizing EPA method 8015 modified. r <br />` 4.3 Soil Analytical Results <br /> No hydrocarbon analytes were detected in any soil sample`lcollected from boring SBI or SB2. <br /> Analytical results of soil samples are summarized in Table`2. Laboratory reports and chain of <br /> custody documentation are included in Atta#hment B. <br /> 5.0 SUMMARY AND CONCLUSIONS <br /> i <br /> 5.1 Summary <br /> $ I <br /> • Soil in the area of investigation consists of pea gravel fill to approximately 6-9 feet bgs, ! <br /> underlain by elastic silt, poorly graded sand, and well graded sand. <br /> • No groundwater was encountered during the investigation", which extended to approximately 26 <br /> feet bgs. <br /> • No TPHd, BTEX, or MTBE were detected in any sample:collected during this investigation. <br /> El <br /> 5.2 Conclusions <br /> Soil contamination is apparently limited to a small area in the immediate vicinity of the former <br /> 04 <br />{ dispenser at depths shallower than 10 feet bgs. !. <br /> • Based on the absence of soil contamination below approximately 6 feet and the anticipated <br /> depth to groundwater of approximately 40 feet bgs; there appears to be no threat to <br /> groundwater beneath the site. <br />' 6.0 RECOMMENDATIONS # <br /> Based upon field and analytical data collected during this investigation, Ground Zero recommends <br /> that the site be closed with no further action required. <br /> i <br /> E` <br /> it <br /> y3 <br /> iF <br /> i <br /> t <br /> taylorlreporlslsummary]Am <br /> i <br />