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la <br /> 101 <br /> w . <br /> Knowles Gain Station <br /> 202/799-5027.02 <br /> July 21, 1988 <br /> f� <br /> The monitoring wells were re-sampled on February 2, 1988 and <br /> analyzed again for TPH as gasoline and 5T£X concentrations. <br /> Benzene concentrations decreased to 3, 2 and 6 ppb in MW-1, MW-2 <br /> and NW-3, respectively. TPH as gasoline concentrations were <br /> � s roughly similar to those of the previous sampling. <br /> The groundwater monitoring wells were again sampled on June <br /> 24, 1988 during the most recent work at the site. These most <br /> f recent analytical results for benzene. revealed concentrations of <br /> 1, <0.5 and 680 ppb in MW-1, MW72 and MW-3, respectively. The <br /> increase in the concentration of benzene in MW--3 corresponds to <br /> an increase in TPH as gasoline to .6800 ppb (Table 3) . <br /> E - - - - <br /> CLOSURE <br /> GTI would like to thank Mr. Ted Knowles for the opportunity <br /> '. .� . to have been of service on this project. If you have any <br /> € Sacramento <br /> questions regarding this report, please contact our <br /> Te,iritory office at (916) 921-1800. <br /> s y <br /> }. <br /> y - ; <br /> 4 <br /> g <br /> �a °+7 <br /> f _ L <br /> No <br /> No <br /> 15 ; <br /> v <br /> � rf <br />