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a <br /> average transmissivity for the tested area of 6,000 gpf/day. The <br /> me <br /> cone of depression produced during the 18 hours pumping period <br /> r <br /> Affected most of the site. <br /> Slug tests of zone 3 were run in wells MW-22, and MW-31. The <br /> E ' i <br /> calculated transmissivity values were 871 gpf/day and 3198 t <br /> gpf/day, respectively. The slug test results are considered to <br /> # e <br /> be semi-quantitative. Details of slug test methods and <br /> r � <br /> calculations are given in Appendix B. ; <br /> R-� <br /> w The observed transmissivity of zone 3 appears to vary across the <br /> site in a similar Way to which sediment grain size and sorting <br /> { vary. Average grain size, sediment sorting, and zone 3 <br /> � ! <br /> � . transmissivit appear to increase to the southeast. <br /> Iid�rater Oyzo1�+t, <br /> Groundwater quality is d_j <br /> rectly affected by the rate and are.i <br /> extent by which leaked <br /> gasoline from the underground storage tank <br /> Pit percolate down through the vadose zones. Hydrocarbon t <br /> contamination in the vadose zone at this site is primarily <br /> limited to the contact between zones 1 and 2 near the tank pit <br /> and a small soil column extending down to the <br /> water table. <br /> Lateral migration of petroleum hydrocarbons apparently occurred <br /> ti,f <br /> along the contact between zone 1 and zone 2. However,. based on ; <br /> Y <br /> J coil cora analy$es, Table 3, the current degree of petroleum <br /> t " <br /> hydrocarbon in the vadose zone does not appear to <br /> Y p� significant. <br /> Th® contamination eventually roaches the. water table where. eome <br /> -;a of the gasoline dissolves in <br /> groundwater. Seasonal water table <br /> �� 13 r . <br />