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i <br /> , <br /> EXPLANATION , <br /> ML Silt, Some Clay, Clayey silt, Silt <br /> N Station Building Concrete Walkway <br /> CL Clay Trace silt, Silty Clay <br /> BL N BSM Silty Sand, Fine—grained <br /> M Asphalt m m Asphalt m <br /> SP Sand, fine—grained <br /> 0 <br /> Tank Cavity o Soil Sample Location <br /> 5 I ] 1 E I I 43/011 Concentration Of Total Petroleum <br /> ] [ Hydrocarbons As Gasoline In Parts <br /> Per Million (ppm)/Concentration Of <br /> Underground Benzene (ppm) <br /> ML <br /> 10 <1 0/<0 005 [ Storage Tank I <br /> _ [ [ Q Static Water Level <br /> ML I ML [ ML I � [ [[ I ML <br /> 15 L_ 13/030 Screened Interval Of Vapor Extraction <br /> And Groundwater Monitoring Wells <br /> c� 20 I ] <I 0/0 008 ] Q* Probable Depth To Groundwater <br /> Before January 1988 Based On <br /> ML/CL Depth To Groundwater Measurements <br /> In Wells At Nearby Sites <br /> N 25 <1 0/0 048 <br /> 0 <br /> m * ] <I 0/<0 005 �� <br />. 30 = SM �— CL /r�� 92/051 = — <br /> n � <br /> ID ,�------ <br /> E 35 [ ML/CL <I 0/<0 005 5P I <br /> aSZ ? `���` — — - - - — - - - - �� - - - - � 10/28/93 <br /> 40 SP 1 0/012 �\ 43/011 <1 0/0 0059 ��� r / Range In Static Water Level Ob erved <br /> SM t7 <br /> 31/0 51? During Monitoring <br /> 24/92 <br /> 45 — ML^� - - — - - - - - - --- — <br /> 50S 10 <br /> ] P r <br /> 55 5 <br /> s0 0 10 20 <br /> APPROXIMATE SCALE <br /> 65 (In feet) <br /> rtical Exaggeration = 2X <br /> GEOLOGIC CROSS-SECTION B-B' PLATE <br /> 5� ARCO Service Station No. 2168 <br /> 441 West Charter Way 4 <br /> FU In <br /> PROJECT NO. 31009 1009J5A Stockton, California <br />