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Page 7 of 7 <br /> Table 1 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station#4932 <br /> 16 E Harding Way,Stockton CA I <br /> =Well Depth,1',' ,Groundwater" - LPH Groundwater Ethyl- Xylenes MtBE MtBE <br /> �Well4r � x s te-v& <br /> �,R� D`ate��� � Y E,f�evaf�onto�Wate,�rs�`.,�Elevation Thickness Elevation TPHg Benzene Toluene benzene- (total) X8020 (802018260) I.DO <br /> Number�,Sampled„; .(ft,'MSLr 4 TOC} ,{ft=MSL) (ft) Change(ft) (ppb} (ppb) (ppb) (ppb) (ppb) (ppb) _ (mg/L) <br /> CCTS 041213/03 — -- - <50 <0 50 <0 50 <0 50 <0 50 -- <0 50 — <br /> 07126103' — — — — <50 <0 50 <0 50 <0 50 <0 50 — <0 50 — <br /> 1010g/03 — -- -- <50' <0 50 <0 50 <0 50 <0 50 — — — <br /> 01/13/04 — — — — — <50 <0 50 <0 50 <0 50 <0 50 — <0 50 <br /> 04/26104 — — — — — <60 <0 5o <0 50 <0 50 <0 50 — <0 s0 <br /> Notes <br /> TPHg=Total petroleum hydrocarbons as gasoline ppb=parts per billion I <br /> MtBE=Methyl terbary butyl ether mg1L=milligrams per liter <br /> DO=Dissolved oxygen PINP=purged/not purged <br /> LPH=liquid phase hydrocarbon 8020=analyzed by EPA Method 8020 <br /> ft=feet 8260=analyzed by EPA Method 8260 <br /> MSL=mean sea level <=below given laboratory detection limit <br /> FOC=top of casing NS=not surveyed <br /> '=analyzed using EPA Method 8260 <br /> '*=Hydrocarbon pattern is present in the requested fuel quantitation range but does not resemble the pattern of the requested fuel <br /> '=groundwater elevation corrected by adding 0 77 X product thickness <br /> `=Discrete peak @ C6-C7 <br /> '=This sample was analyzed beyond the EPA recommended holding time The results may still be useful for their intended purpose <br /> '=The concentration indicated for this analyte is an estimated value above the calibration range of the instrument <br /> '=Gasoline C6-CI0 <br /> "=Discrete peak @ C5-C6 <br /> =Laboratory reported result as possibly biased high due to the continuing calibration verification falling outside acceptance criteria <br /> —=not measured or analyzed <br /> I <br /> I <br /> I <br /> i <br /> I { <br /> i <br /> Project/ARCO/4932/Reports/Tables/2004 gwtables4932)ds <br /> I <br /> I <br /> I <br />