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y� <br /> �.rm <br /> f <br /> 1. H. KLEINFELDER&ASSOCIATES <br /> File No. W-2005-1 <br /> November 14, 1985 <br /> Page 3 <br /> F-. <br /> to store waste oil, and/or solvents. The tank was buried at an approximate depth of <br /> rr• 10 to 12 feet below the surface grade and is shown on Plate IL Two 10 000 <br /> and one 6,000 � gallon <br /> gallon fuel storage tanks were also removed from the site. The county <br /> representative present at the time of removal of the three large fuel storage tanks did <br /> not require testing in the tank excavation and no samples were collected by the client <br /> or J. H. Kleinfeider & Associates. <br /> III. PURPOSE <br /> The purpose of this investigation was to assess whether the removed one, I,000 <br /> gallon tank had impacted local Soil and/or ground water quality. Towards this end, <br /> one soil boring was placed over the site of the former underground gasoline storage <br /> tank location and was completed as a monitoring well. Soil samples were collected at <br /> 5-foot intervals in the zone from the bottom of the tank cavity to a depth of 45 feet <br /> below the surface grade, During drilling, a KleinfeIder geologist classified the <br /> subsurface soils; collected the soil samples for subsequent analyses, and logged the <br /> bore hole. <br /> iV. FIELD A---'ITIES/OBSERVATIONS_ <br /> A. Soil Borings <br /> The location of the soil boring and the monitoring well which was installed in the <br /> ti same boring is shown on Plate II. The boring was drilled using a truck-mounted mobile <br /> ' B-41 drill rig equipped with 8-inch hollow stem auger. All sampling equipment was <br /> -. thoroughly cleaned prior to use. A description of the soil encountered is presented on <br /> Plate IV, with a copy of the Unified Soil Classification System ;used to identify the <br /> soils) presented on Plate III. The soil encountered during z <br /> g <br /> driIIin,, consisted of silty <br /> sand, clayey silt and sandy clay. Groundwater was encountered 48 feet below grade in <br /> EE <br />