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The boreholes were logged using the Unified Soil Classification System under the <br /> supervision of a registered geologist Additional lithologlc mformauon was collected to <br /> describe the subsurface geology Sod samples were field screened for presence of <br /> contaminants by checking for presence of odor and staining, and a photo ionization meter <br /> was used for reconnaissance soil field vapor measurement use Soil samples were <br /> collected at minimum five-foot intervals, with additional samples collected at intervals of <br /> obvious contamination and at stratigraphic features of interest using field discretion In <br /> . addition, Boreholes PB-15, PB-16, PB-17, and PB-18 were continuously cored (see <br /> attached boring logs) Upon completion of the borehole drilling and collection of <br /> information, all boreholes were backfilled with cement grout, placed from the bottom to <br /> top of the borehole by tremae line <br /> Reconnaissance Groundwater Sam IM <br /> A total of eleven boreholes were sampled in Apn125, 2000 and April 19, 2001 using push - <br /> or drill rods as temporary casing Boring PB-14 collapsed winch prevented the collection <br /> of a groundwater sample Borehole PB-20 collapsed upon the GeoProbe sampler and the <br /> threads faded which attached the sampling egwpment Very severe flowing conditions <br /> completely covered the sampler equipment preventing recovery, and the borehole was <br /> cemented at that point <br /> Depth to groundwater measurements were made from the ground surface to the nearest <br /> one-one hundredth of one foot from existing grade, and also checked for the presence of <br /> separate phase product pnor to sample collection The groundwater sample was carefully <br /> collected with a clean disposable bailer, or GeoProbe water sampler, which advances a <br /> clean screen into the aquifer strata, and poured into the appropriate laboratory prepared <br /> container with minimum cavitation and headspace Each water sample was labeled, <br /> Iogged onto a chain-of-custody form, and placed m a chilled ice chest on crushed ice <br /> Chemical Anal sjs <br /> A total of thirty-nine (39) soil samples and eleven reconnaissance groundwater samples <br /> were analyzed at Chromalab, Inc a State certified analytical laboratory from the <br /> exploratory borings These samples were tested for the following, Total Petroleum <br /> Hydrocarbons as Gasoline (TPHG) and Diesel (TPHD), Benzene (B), Toluene (T) <br /> Ethylbenzene (E) and Xylene (X), Methyl-tert-butyl-ether (MTBE) and fuel oxygenates, <br /> using EPA Methods 351018015, 8020, 8240 and 8260 The results are tabulated and <br /> presented in the attached Tables 1 and 2 together with previous boring data (Tables 3 and <br /> 4) are attached <br /> Paye 6 <br />