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TABLE 6 - SUMMARY OF MONITORING/EXTRACTION WELL DETAILS FLAG CITY CHEVRON 6421 Capitol Road, Lodi, California Well Installation Date Borehole Total Casing Casing Slot Casing Screen Fitterpack Bentonite Grout Aquifier I D Diameter Depth Diameter iMatenal Size Elevation Interval Interval Interval Interval Zone MW-14 11 October 2002 8%4-inch 60 ft 2-inch PVC 0 02-inch 1090 40 to 60 ft 38 to 60 ft 35 to 38 ft 1 to 35 ft Second Zone MW-15 11 October 2002 81/-inch 75 ft 2-inch PVC 0 02-inch 1104 65 to 75 ft 63 to 75 ft 60 to 63 ft 1 to 60 ft Rocky's Upper Zone MW-16 09 October 2002 8'/4-inch 25 ft 2-inch PVC 0 02-inch 1056 5 to 25 ft 4 to 25 ft 3 to 4 ft i to 3 ft First Zone MW-17 09 October 2002 8'/4-inch 60 ft 2-inch PVC 0 02-inch 1050 40 t0 60 ft 38 to 60 ft 35 to 38 ft 30 to 35 ft Second Zone MW-18 09 October 2002 8Y4-inch 75 ft 2-inch PVC 0 02-inch 1054 65 to 75 ft 63 to 75 ft 60 to 63 ft 1 to 60 ft Rocky's Upper Zone MW-19A 14 May 2004 8'/4-inch 50 ft 2-inch PVC 0 02-inch 1180 10 to 25 ft 8 to 251/2 ft 6 to 8 ft 1 to 6 ft First Zone MW-19B 14 May 2004 8%4-inch 50 ft 2-inch PVC 0 02-inch 1172 45 to 50 ft 43 to 50 ft 25'/2 to 43 ft 1 to 6 ft Second Zone EW-1 28 March 2000 10'/4-inch 35 ft 6-inch PVC 0 02-inch 12 10 8%2 to 33%2 ft 6%2 to 35 ft 4'/2 to 6'/2 ft 1 to 4'/Z ft First Zone EW-2 17 July 2000 10'/4-inch 35 ft 4-inch PVC 0 02-inch 1146 10 to 35 ft 8 to 50 ft 6 to 8 ft 1 to 6 ft First Zone EW-3 17 July 2000 10'/-mch 50 ft 4-inch PVC 0 02-inch 1203 40 to 50 ft 37%2 to 50 ft 35 to 37%2 ft 1 to 35 ft Second Zone EW-4 09 October 2000 12-inch 35'/2 ft 4-inch PVC 0 02-mch 1270 10 to 35 ft 8 to 35 ft 5'/z to 8 ft 1 to 5'/2 ft First Zone EW-5 09 October 2000 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 EW-6 11 October 2000 12-mch 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 EW-7 10 October 2000 12-inch 35 ft 4-inch PVC 0 02-inch 1180 9'/2 to 34'/2 ft 8 to 35 ft 5 to 8 ft 1 to 5 ft First Zone EW-8 11 October 2000 12-inch 36 ft 4-inch PVC 0 02-inch 1141 10'/2�35'/2 g to 36 ft 5 to 8 ft 1 to 5 ft First Zone EW-9 16 October 2000 12-inch 35 ft 4-inch PVC 0 02-inch 1191 9'/2 to 34'/2 ft 8 to 35 ft 5 to 8 ft 1 to 5 ft First Zone EW-10 17 October 2000 12-inch 35%2 ft 4-inch 1 PVC 10 02-inch 1172 8 to 35 ft 8 to 35'/2 ft 5 to 8 ft 1 to 5 ft LFffst Zone Notes ft feet below surface grade PVC polyvmylehlonde Well casing elevations resurveyed by Baumbach&Piazza Inc on 10 June 2004,all ' well construction reported to AGE by the San Joaquin County Public Health Services- elevations relative to National Geodlc Suvey datum C 464(NAVD88) Environmental Health Division I ' Advanced GeoEnvironmental,Inc