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KLEINLELDER <br /> 3 SOIL ASSESSMENT <br /> ' This section summarizes the drilling and soil sampling, general site hydrogeology, qualitative <br /> field screening, and analytical results associated with the soil assessment in the vicinity of the <br /> T2/T3 tank site <br /> 3 1 DRILLING AND SOIL SAMPLING <br /> On January 13 and 14, 1993, a Kleinfelder geologist supervised the drilling of four soil <br /> borings and the conversion of three of the bonngs into groundwater monitoring wells (B-3 and <br /> MW-1 through 3). The T2/T3 tank site and boring locations are presented on Plate 3 Boring <br /> ' B-3 was advanced along the western side of the tank site to a depth of approximately 40 feet <br /> below ground surface The monitoring wells were triangulated around the T2/T3 tank site to <br /> assess the groundwater gradient In addition, the wells were constructed within 10 feet of the <br /> ti tank site to evaluate the potential that petroleum hydrocarbons from the tanks may have <br /> impacted groundwater <br /> While drilling, a Kleinfelder geologist collected soil samples, classified the subsurface soil and <br /> logged the boreholes. The boring and monitoring well locations were sampled at 5-foot <br /> intervals for lithologic classification, qualitative field screening, and potential chemical <br /> analysis. <br /> On February 3, 1993, a Kleinfelder geologist supervised the drilling of four additional bonngs <br /> at the T2/T3 site (Plate 3, bonngs B-4 through B-7) Based on the data from the January <br /> drilling and field observations, the borings were advanced to total depths of 25 to 30 feet <br /> below ground surface Soil samples were collected at 5-foot intervals for lithologic <br /> classification, qualitative field screening, and potential chemical analysis <br />� A copy of the Unified Soil Classification System used to classify the soil and a log legend are <br /> i <br /> provided in Appendix B (PIates B-1 and B-2). Descriptions of the soil encountered in each <br /> boring and identification of the sampling intervals are also presented in Appendix B (Log of <br /> Bonngs, Plates B-3 through B-10). Kleinfelder's Field Procedures for drilling and sampling <br /> are provided in Appendix C <br /> 99 Pae 4 0 18 July 27 199 <br /> 24-220152-DDO/FR12-I05 (1 3} g f y 3 <br /> ' copyrisht 1993 Kteinfetder, Inc. <br />