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TABLE I WELL CONSTRUCTION DETAILS,FORMER EXXON RS 7-3942,4444 NORTH PERSHING AVENUE, STOCKTON,CALIFORNIA <br /> Well Elevation Total Well Borehole Casing Screened Slot Filter Pack <br /> Well Installation TOC Casing Depth Depth Diameter Diameter Interval Size Interval Filter Pack <br /> Number Date (feet) Material (feet) (feet) (inches) (inches) (feet) inches (feet) Material <br /> SW2 a 05/12/93 753 PVC 51 50 1075 2 40-45 0 010 35-46 Sand <br /> IW 1 a 01/15/91 687 PVC 49 47 1025 4 27-47 -- 25-49 Sand <br /> V1 a 02/19/91 758 PVC 40 40 10 4 20-40 -- 18-40 Sand <br /> V2 a 02/18/91 811 PVC 40 40 8 2 20-40 -- 18-40 Sand <br /> V3 a 02/18/91 761 PVC 40 40 8 2 25-40 -- 23-40 Sand <br /> V4 a 02/18/91 812 PVC 40 40 8 2 25-40 -- 24-40 Sand <br /> Pl a 01/14/91 644 PVC 435 43 8 2 28-43 -- 26-43 Sand <br /> i <br /> P2 a 01/14/91 677 PVC 445 44 6 2 29-44 -- 27-445 Sand <br /> PSV1 01/16/91 -- PVC 35 17 8 1 12-17 0 020 11 5-18 5 #3 Sand <br /> -- PVC 35 345 8 1 29 5-34 5 0 020 295-35 #3 Sand <br /> PSV2 01/16/91 -- PVC 35 17 8 1 12-17 0 020 11-18 #3 Sand <br /> -- PVC 35 345 8 1 29 5-34 5 0 020 28-35 #3 Sand <br /> UVB * 11/01/96 -- Steel 43 42 24 16 248-32 040 225-32 Medium <br /> 35 5-39 5 0 025 345-43 Aquarium Sand <br /> UVB-MW1 a 02/11/97 740 FVC 40 40 8 2 35-40 0 020 33-40 #3 Sand <br /> UVB-MW2 a 02/11/97 774 PVC 32 32 8 2 24-32 0 020 22-32 #3 Sand <br /> a Well surveyed in October 2001 Vertical datum is based on City of Stockton Benchmark#265,a chiseled cross on the sidewalk on the east side of <br /> Pershing Avenue,south of March Lane on E B M U D easement <br /> PVC Polyvinyl chloride <br /> TOC Top of casing <br /> * The UVB well has two screen intervals separated by a bentonite seal The screen and filter pack intervals are listed above <br /> -- Information not known <br /> g IprojectskA9421publrrk%%ell construcuonU942welldutails As <br /> Page 2 of 2 <br />