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.i r Mr. Ron Rowe i July 26, 2000 Page Four SOIL ASSESSMENT Four soil borings were placed at the site utilizing a direct push drill rig. Prior to drilling, Underground Service,Alert was notified. One boring was placed adjacent to the former tank excavation. The remaining borings were placed approximately fifteen from the former UST excavation. Two borings were placed downgradient to the former tank excavation and one boring was placed upgradient; based on surface topography. The location of the borings is illustrated in } Figure 2. The soil borings were advanced until the first encounter of saturated soils. Soil samples were collected continuously throughout the boring. ,:Soil samples were obtained from the boring # using a 1.5 inch inside diameter(11)),45 inch long,nickel plated core barrel sampler attached to the end of the boring rods. Soil samples were collected by pushing the barrel sampler through the E desired sampling depth with the direct push drill;rig. The sampler was recovered with a section of } undisturbed soil collected within the acetate liner inside the core barrel. A section of undisturbed soil from each four feet liner was capped with teflon and plastic end caps and placed..on ice for � preservation,pending possible laboratory analysis. The remaining portion of soil was subjected to headspace analysis in'-the field utilizing an organic'.vapor monitor (OVM). Soil lithology was recorded in the field and each sample was inspected for evidence of staining, odors and other signs of contamination. Two soil samples per boring were submitted for chemical analysis. Soil samples were sent via over-night courier to a certified laboratory for chemical analyses. Soil samples were analyzed for total petroleum hydrocarbons-gasoline range(TPH-G 8015/2020);TPH - diesel range (TPH-D 8015); benzene, toluene, ethylbenzene, and xylene (BTEX 801518020), methyl-t-butyl ether (MTBE 8260), ethyl-t-butylether(ETBE 8260), methyl-t-amyl ether (TAME 8260), and isopropylether(DIPE 8260). I SOIL CONDITIONS Soil samples were collected continuously throughout each soil boring to a depth of sixteen feet below ground surface(bgs). Generally,soil samples were collected near the base of the former UST and at the base of the soil boring at the soil/groundwater interface. Soil samples were screened on- site utilizing an OVM The soil samples did not display detectable organic vapor readings. No evidence of staining, odors, or other signs of contamination were observed. Soil in the vicinity of the former UST consisted of very stiff gray clay to a depth of four feet. Light brown, medium stiff clay and silt was encountered to total depth. Groundwater was encountered at a depth of 16 feet. Groundwater did not display odors or sheening. 'Soil boring logs are provided in Attachment C. i i ANALYTICAL RESULTS Eight soil samples were submitted to Test America, Inc. located in Nashville, Tennessee for laboratory analyses. Test America is a state of California certified laboratory. Eight soil samples were analyzed for TPH=G,TPH-D,BTEX,MTBE,ETBE,TAME,and DIPE. Only one soil sample revealed detectable target constituent concentrations. One soil sample collected from soil boring SB- 3 at a depth of 15.5 - 16 feet (SB-3, 15.5 - 16 ft) contained xylenes at a concentration of 0.0039 mg/kg, slightly above the laboratory detection limit of 0.0020 mg/kg. A summary of the soil analytical results are provided in Table 3. A copy of the laboratory analytical report is included in Attachment D. 00268115.2.85 "