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Page 6 of 6 <br /> Table 1 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station#4932 <br /> 16 E Harding Way Stockton CA <br /> "-, ,3 r "� " Well _T Depth;t' Groundwater r LPH,:;, Groundwater Ethyl- - Xylenes' MtBE MtBE_ <br /> .Well- Dates z- Elevation F-,to Water -Elevation ` Thickness- Elevation :TPHIg Berizew, Toluene -benzene (total) 020E' (802018260) DO <br /> Number Sampled'-,_ (ft MSL)- (it TOC) ft,MSL) {ft) Change(ft) (ppb) ppb ' (ppb)' A (ppb) (ppb) _e (ppb) -(mg/-) <br /> EW-6 11/20/02 P NS 3107 - 000 - 28 000 390 1,500 1200 6,200 440 280 043 <br /> 01/30/03 P 2973 - 000 - 26,000 5 1 800 2,500 1 500 6200 720 600 0 83 <br /> 04!28!03 2920 - 0 00 - Well unable to be sampled connected to remedial system <br /> 07129103' IVP -- - - - 4 300 5 220 57 17 87 - 1 000 - <br /> 10108-17103 3232 000 - Insufficient amount of water in well for sample collection <br /> 01112/04 dry - - - Insufficient amount of water In well for sample collection <br /> EW-7 09103103 NS - - - 74,000 <2500 <2500 <2500 <2500 - 170 000 <br /> 12/03/03 -- - - - 31 000 <1000 <1000 <1000 <1000 - 90 000 - <br /> 01112l04 3175 - - - 44,000 <2500 <2500 <2500 <2500 - 110,000 -. <br /> QCTB 04!28103 - - - -- - <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 /> 10/09/03 - - - -- - <50' <0 50 <0 50 <0 50 <0 50 - -- - <br /> 01/13104 - - -- - - <W <0 50 <0 50 <0 5o <0 50 -- <0 50 - <br /> Notes <br /> TPHg=Total petroleum hydrocarbons as gasoline ppb=parts per billion <br /> MtBE=Methyl tertiary butyl ether mglL=milligrams per liter <br /> DO=Dissolved oxygen PINP=pufgedlnot 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 /> TOC=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 /> a=The concentration indicated for this analyte is an estimated value above the calibration range of the instrument <br /> °=Gasoline C6-C10 <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 /> Project/ARCO/4932/Reports/Tables/1Q04 gwtables4932 <br />