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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 /> IP2A 09/22/04 7 55 SS 40 305 825 050 29-30 0 020 28 5-30 5 #3 sand <br /> (24-285)b <br /> IP2B C09/22/04 761 SS 40 365 825 0 75 33-36 0 010 32 5-36 5 #2112 sand <br /> (30 5-32 5)b <br /> (24-28 5)b <br /> IP3A e 09/20/04 831 SS 40 315 825 050 29 5-30 5 0 020 29-315 #3 sand <br /> (26-29)b <br /> IP3B C09/20/04 822 SS 40 39 825 075 35-38 0 010 34-39 #2/12 sand <br /> (315-34)' <br /> (26-29)b <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 /> b Bentonite seal <br /> c Well surveyed in March 2005 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 /> SS Stainless steel <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 /> Note IP1A and IP1B,IP2A and IP2B,and IP3A and IP3B are nested wells <br /> g 1projectsM9421pubh6we11 construcl=0942we][detads As Page 3 of 3 <br />