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in the wells. The saturated thickness was also similar in each well . <br /> The top of the screened interval ranges between 9 and 16 feet above <br /> the static ground-water level , and the bottom of the screened interval <br /> ranges between 34 and 41 feet below the static ground-water level . <br /> The completed wells were developed by bailing, plunging and purging, <br /> and compressed air evacuation until no visible sediment was present in <br /> the purged water. All well installations were completed by adding a <br /> protective cover and locking device. <br /> The top of well casings and adjacent ground surfaces were surveyed on <br /> May 7, 1987, to determine elevations relative to mean sea level . <br /> Bench marks established by the County during previous site surveying <br /> were used for reference elevations, and coordinates of the wells were <br /> tied in with the site grid system. Survey data are presented on <br /> Table 2. <br /> GENERAL HYDROGEOLOGIC CONDITIONS <br /> Available regional hydrogeologic information indicated a very gentle <br /> t <br /> E <br /> wes - to-southwest-trending ground-water gradient, possibly influenced <br /> by intermittent pumping from nearby water supply wells. This prelimi- <br /> nary indication of regional conditions was generally supported by <br /> local evidence, including the ground-water elevation data collected in <br /> { this study and the conclusions presented in the ground-water monitor- <br /> ing program prepared in 1986 by J.H. Kleinfelder and Associates (see <br /> Appendix A) . <br /> Ground-water level elevations in the installed monitoring wells range <br /> i from -6.43 to -8.25 feet (depths of approximately 104 to 114 feet <br /> below the ground surface) . These data indicate that ground water <br /> flows in a south-to-southwest direction. Well MW-1 is the upgradient <br /> well , and Wells MW-2, MW-3, and MW-4 are the downgradient wells. <br /> t <br /> l PJ9 9390102.00D 4 <br /> Et con Associates <br />