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, <br /> y Golden Grain ComPany <br /> January 11 , 1989 <br /> 202/799-5045,01 <br /> s to 9--foot thick clay <br /> a depth of approximately 22 feet ' A 2-followed by coarse sand to the depths <br /> layer was then encountered, <br /> explored. <br /> HydrogeologY of these boreholes was also recorded during14 <br /> drilling. Depth of the unconfined water stabilized n it <br /> and 37 feet region. <br /> k" in the boreholes constructed in the tank p <br /> 22 feet seems to be <br /> la er at the approximate depth of <br /> The clay Y not constitute an aquitard. <br /> s, <br /> variable in thickness and may or ma <br /> .s Y <br /> The silty sand above the clay is an unconfined aquifer; the <br /> orate, <br /> IA saturated white sand below the clay layer may be a sep . <br /> wells except MW-7 were <br /> sem aquifer, All monitoring the lower <br /> screened above the clay layer. MW-7 was screened in <br /> rj els on December 29, <br /> When SCS monitored water lev <br /> sand layer only. <br /> ter elevation in MW-7 was higher <br /> 1987 and February 2, 1988, <br /> the wa <br /> ' .. . <br /> than those in the four wells surrounding MW-7 <br /> this site on June <br /> GTI monitored and surveyed all wells at <br /> ra lec' wells not impacted with free product. (See <br /> 21, 1988 and sop <br /> B, <br /> for SOPS <br /> g, and 10 regarding water monitoring <br /> ;.: <br /> .; and sampling. ) This data and analytical results were used to <br /> Appendix VIII <br /> ure 4. <br /> t Free product was found in MW-1, <br /> P <br /> MW-2, m <br /> repare Table 1 and Figalmost 3 inches) <br /> MW-4, and MW-5, with the greatest aoun <br /> II 2. The highest levels of dissolved hydrocarbon <br /> In � 3 and the contaminatiot. in the <br /> contamination were found in MW- resent in the <br /> sample from MW-7 shows that hydrocarbons are p <br /> r - inferred second aquifer. <br /> i� <br /> .., .. .-..wv+11. .. .. <br />