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• Ms Margaret Lagono Page 2 fringe zone of each boring at depths ranging from 8 5 to 9 5 feet below ground surface (bgs) Groundwater was encountered between 9 and 10 feet bgs Soil samples were collected into pre- washed, six-inch long brass sleeves using a hand held drive hammer The tubes were capped on each end with Teflon tape and plastic caps and immediately placed in a cooled ice chest Augenng and sampling equipment was decontaminated between each use using a non-phosphate detergent and water Groundwater was encountered between 9 and 10 feet bgs One groundwater sample was collected from HB-6 The groundwater sample was collected into appropriate containers using a disposable bailer and immediately place in a cooled ice chest Field notes are included in Attachment A The soil types encountered were consistent through all the borings Generally, a dark brown silty clay was present to a depth of 4 feet bgs underlain by a gray fine-grained sand from 4 to 5 feet bgs Below 5 feet bgs as a dark brown silty clay Soil and groundwater samples were transported under chain of custody protocol to Argon Labs (FLAP #1873) in Ceres, California All soil and groundwater samples were analyzed for benzene, toluene, ethylbenzene, xylenes (BTEX) and methyl tert-butyl ether (MTBE) using EPA method 8020, and total petroleum hydrocarbons as gasoline (TPHg) using modified EPA method 8015 In addition, soil samples collected from borings HB-1, HB-4, and HB-6 and the groundwater sample collected from HB-6 were analyzed for total petroleum hydrocarbons as diesel (TPHd) using modified EPA method 8015 The borings were backfilled with neat cement to the surface Soil cuttings generated during augering/sampling were placed in a labelled DOT approved drum which is temporarily located behind the station building RESULTS AND CONCLUSIONS TPHg concentrations in soil ranged from 1 2 parts per million (ppm) in boring HB-6 to 1,600 ppm in boring HB-1 Benzene concentrations in soil ranged from nondetectable in boring HB-6 to 5 9 ppm in boring HB-1 MTBE was nondetectable in all soil samples TPHd was detected in soil samples HB-1 and HB-4 at concentrations of 1,200 and 140 ppm, respectively TPHd was not detected in soil sample 14B-6 Soil analytical results are summarized in Table I Laboratory reports are included in Attachment B The groundwater sample collected from HB-6 contained 28,000 parts per billion (ppb) TPHg, 2,000 ppb TPHd, and 18 ppb benzene MTBE was not detected in the groundwater sample Groundwater analytical results are summarized in Table 2 Laboratory reports are included in Attachment B i Bromdzeln=snrlsubsurf