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• TABLE 5 SUMMARY OF MONITORING WELL/EXTRACTION WELL DETAILS FLAG CITY CHEVRON 6421 Capitol Road, Lodi, Califomia Well Installation Borehole Total Casing Casing Slot Casing Screen Filter Pack Bentonite Grout Aquifrer I D Date Diameter Depth Diameter Material Size Elevation Interval interval Interval Interval Zone EW-4 09 October 12-inch 35'/2 ft 4-inch PVC 0 02-inch 1270 10 to 35 ft 8 to 35 ft 5'/s to 8 ft 1 to 5'/z ft First Zone 2000 EW-5 09 October 12-inch 34%2 ft 4-inch PVC 0 02-inch 1229 9 to 34 ft 8 to 34%2 ft 8 to 34%2 ft 6 to 8 ft First Zone 2000 EW 6 I 1 October 12-inch 35'/2 ft 4-inch PVC 0 02-inch 1145 10 to 35 ft 8 to 35`/2 ft 5 to 8 ft 1 to 5 ft First Zone 2000 EW-7 10 October 12-inch 35 ft 4-inch PVC 0 02-inch 11 80 9'/2 to 34'/2 ft 8 to 35 ft 5 to 8 ft 1 to 5 ft First Zone 2000 11 October 10'% to 35'/2 EW 8 12-inch 36 ft 4-inch PVC 0 02-inch 11 41 8 to 36 ft S to 8 ft 1 to 5 ft First Zone 2000 ft 16 October EW-9 12-inch 35 ft 4-inch PVC 0 02-inch 11 91 9%2 to 34%2 ft 8 to 35 ft 5 to 8 ft 1 to 5 ft First Zone 2000 EW-10 17 OOOber 12-inch 35%2 ft 4-inch PVC 0 02-inch 11 72 10 to 35 ft 8 to 35%2 ft 5 to 8 ft 1 to 5 ft First Zone Notes ft feet below surface grade PVC polyvmylchlonde ' well construction reported to AGE by the San Joaquin County Public Health Services-Environmental Health Division Well casing elevations resurveyed by Baurnbach&Piazza Inc on 10 June 2004,all elevations relative to National Geodic Survey datum C 464(NAVD88) Advanced GeoEnvironmental,Inc