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w� w� �n �� 1i � � arm � ■�� �� �■■� �tl• tiw■■ tl• �� <br /> • Tale <br /> Groundwater Monitoring Data and Analytical Results <br /> Chevron Service Station##9-6171 <br /> 6633 Pacific Avenue <br /> Stockton,California <br /> EXPLANATIONS <br /> Oroundwatcr monitoring data and lahoratory analvtical result,,prior to May 22,2000 were compiled from reports prepared by Blaine Tech Services,Inc <br /> I <br /> 7 OC= Top of Casing 1 PH G=Total Petroleum Hydrocarbons as Gasoline 7OG= I otal OII&Grease <br /> (l1)=Fcet B=Benzene (ppb)=Parts per billion <br /> GWL=61oundwatei Llevauon "I =Toluens, --=Not Mcasured/Not Analyzed <br /> (mei)= Mean ,(,a level E=Ethylbenzene NP=No Purge <br /> S I =Screen intL1 Vdl% X=Xylenes (R)=Re-analysis <br /> (ft hg,,)=1 wt Below Ground Surface M rBE=Methyl tertiary'butyl ether QA=Qualit) ASSurance/Trip Blank <br /> DTW=Depth to Water EDB=Ethylene Dibromide <br /> ' 3 OC.elevalrons iwrL Surveyed in luly ol'2001 by Morrow Surveying Elevations are bayed on San Joaquin County Benchmark 12,a brass disc marking <br /> col monumeni stamped IN-4' m monument box on the east side of Paw fic Avenue at the approximate centerline Benjamin Ilolt Drive,(Elevation= I 1 02) <br /> C hrornatagram pittt.rn indicates an unidentified hydrocarbon <br /> E hromatogram pattern indicates a gas and unidentit€cd hydrocarbon <br /> Confirmation run <br /> 4 Lahorator,, report mdrcatcs B,,-(2-Ethvlhe%yl)-Phthalate uas detected at 15 ppb and Butyl-Bentyl-Phthalate was detected at 9 9 ppb - <br /> Ga,,olme iangc cone enti aurin rc ported peak,,are representative of tetrachloroethane and trace amount of gasoline <br /> F Laboratorz report mdicats,s di%e,reie peaks <br /> 7 M 1131'by CPA Method 8260 _ <br /> Mi BC by I-PA Method 8260 %a-analyzed outside tN,EPA recommended holding time <br /> SurroeN data unavailable <br /> n BTEX and MTBE by FPA Method 9260 <br /> I aboruton report indicates the reported value for Toluene is suspected system contamtuation <br /> TO( has been altered unable to determine GWE <br /> i3 Lahm-atory report indicates the observed sampled pattern is not typical of gasoline <br /> Split sampled c%rth Levies,rricke <br /> r5 No purge due to insufficient water _ <br /> 9 617t x1s/9395121 24 - - As of 04/20106 <br />