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�.i <br /> ' 1 0 <br /> LINE OF <br /> CROSS SECTION y <br /> B 13 �� o <br /> 1 <br /> A, <br /> 1 <br /> i A �- cV In m ¢ m 0 ! <br /> 0 <br /> 5— <br /> CIL72 GROUND 'SURFACE M v ca a -5 <br /> SILTY CLAY 0 30 <br /> ' UNDERGROUND — — - - - _ - - —t - - _ — _ - - " � - - - - - — _p _j SCALE IN FEET <br /> J 0-- FUEL TANKS w <br /> � r <br /> CLAYEY SILT TO SILT c <br /> — f f ~ SILTSAND TO SAND — 5 <br /> LEGEN <br /> 5_ Q <br /> GROUNDWATER MONITORING WELL <br /> 6 SNOWING SEAL, BENTONITE, AND <br /> in - - - - - - - - - - SCREENED INTERVAL <br /> f Z —10— - - - -"ND<0.005 ND<1- - - - - -,i - - - - - - ---10 a <br /> ' — CLAYEY TO SANDY SILT I� - -- GEOLOGIC CONTACT <br /> UJ <br /> _15_ i - -- - - -1-- - - - - - - - � � - - - • ND<1 SOIL SAMPLE AND TOTAL <br /> — — — ND<0.00 ND<1 —�5 > <br /> o PETROLEUM HYDROCARBONS AS <br /> 0.13 No<� I, mGASOLINE CONCENTRATION IN <br /> a <br /> __20 PARTS PER MILLION <br /> rd -20- SILTY SAND TO I SAND w 0.13 • SOIL SAMPLE AND BENZENE <br /> CONCENTRATION IN PARTS PER <br /> _25_ --25 MILLION <br /> I� ND NOT DETECTED ABOVE REPORTED <br /> _ DETECTION LIMIT <br /> -30- -30 x GROUNDWATER ELEVATION AS <br /> I <br /> t MEASURED ON APRIL 25, 1994 <br /> LINE OF � <br /> CROSS SECTION ° m <br /> 1 <br /> ' B' <br /> BUILDING A-A <br /> I' B T m cD <br /> U <br /> ' 5— I GROUND SURFACE —5 <br /> UNDERGROUND " t SILTY CLAY IJ <br /> FUEL TANKS ` --0 <br /> ! Li CLAYEY TO I SANDY SILT 1 SILTY <br /> — 7 <br /> UNDERGROUND — <br /> USED OIL TANK — ~ �— — -. — ---10 Q FIGURE 4 <br /> z <br /> 4, —10— ; La <br /> HYDROGEOLOGIC <br /> CROSS SECTIONS <br /> SANDY, SILT --�5 O A—A' AND B— <br /> I <br /> B' <br /> —15— <br /> (n <br /> f' m SILTY SAND TO SAND ND<0.005' ND<1 Q <br /> a <br /> BP OIL SERVICE.STATION N0. 11193 <br /> —20— —20 3202 WEST HAMMER LANE <br /> STOCKTON, CALIFORNIA a <br /> ,� —'-25 PROJECT N0. 10-136 <br /> —25— � <br /> m � <br /> I ) — — --30 �AUSTO ENGINEERING GROUP <br /> 30 <br /> WALNUT CREEK, CALIFORNIA <br /> F <br /> 1 <br />