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ENVIRONMENTAL SERVICES <br /> Westem Division CLIENT SITE NUMBER LOCATION <br /> Exxon Co USA RS 7-3942 4444 Pershing Ave <br /> Mai Stockton, CA <br /> DRILLING AND 10 Inch Hollow-Stem Auger <br /> SAMPLING <br /> LOG OF SOIL BORING RW4 METHoos 2 inch Spilt Spoon Sampler <br /> Coordinates: 121019'10"W WATER LEVEL3T 1 DRILLING <br /> 037°59'11" N TIME START FINISH <br />' 1205 TIME TIME <br /> Elevation top of casing.g 23 ft msl DATE 1118191 2/19/91 1100 1300 <br /> Casing below surface 0 40 ft REFERENCE DATE GATE <br /> SURF TOC 1/16/91 1/18/91 <br />' IttChes SURFACE <br /> Cement sidewalk <br /> WELL DEPTH GRAPHIC CONDITIONS <br /> m O DETAIL (Feet) LOG <br /> in Cr m `� DESCRIPTION by: K Hllbelink <br />' f 1 g Concrete <br /> sp Sandy fill <br /> 2 Sticky gray clay <br /> 3 CH <br /> 10 4 <br />' 12 8 50 10 <br /> 5 Fine yellow silty sand, dry <br /> 6 <br /> 5M <br /> 7 <br /> 9 <br /> 15 Silty brown clay with calcareous material In <br /> 10 cracks <br /> 17 12 30 NR <br /> 50 11 <br /> 12 <br /> 13 -- <br /> 14 CL <br /> I 15 15 <br /> 28 <br /> 16 12 NR <br /> 5o 16 Silty brown clay, dry <br /> 17 <br /> 18 <br /> 19 -- <br /> 20 -- <br /> Page <br /> 92aPage 1 of 2 <br />