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Tajo jf 4 - • <br /> Groundwater Monitoring Data and Analytical Results <br /> � Tosco(Circle K)Unit#086711 <br /> _ 8606 Thornton Road <br /> Stockton,California <br /> I <br /> EXPLANATIONS- �Ir <br /> _ Groundwater monitoring data and laboratory analytical results prior to May 14, 1999,were compiled from reports prepared by Secor International;Inc <br /> r <br /> - TOC=Tap of Casing elevation B=Benzene ppb=Parts per billion <br /> DTW=Depth to Water T=Toluene lh f ' =Not Measured/Not Analyzed <br /> (ft}=Feet E=Ethylbenzene i, j ��� ND = Not Detected - <br /> GWE=Groundwater Elevation X=Xylenes n <br /> nisi=Relative to mean sea level - MT13E=Methyl tertiary butyl ether, <br /> TPH(G)=Total Petroleum`Hydrocarbons as Gasoline _ <br /> �r <br /> * TOC elevations are based on City of Stockton Benchmark#9 A brass disk in monument box marking the east 1/4 corner of section 8 Township to North range 6 East <br /> MTBE by EPA Method 8260 ' <br /> Laboratory reportreport-indicates gasoline C6-C 112 - <br /> ' 3 Laboratory report indicates unidentified hydrocarbons C6-C l2 <br /> I <br /> h k <br /> C <br /> r <br /> — a <br /> — 9 <br /> p s � <br /> 1 4 <br /> 08671 xls/#180198 f 3 tll As of 05/01/00 <br />