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4r M man M <br /> GROUND WATER MONITORING DATA <br /> Exxon Service Station No 7-0137 <br /> Ground 1605 S El Dorado Street <br /> Casing Depth to Water Stockton,Cat]fM* Total TPPH as TEPH as Ethylene Total <br /> Monitoring Sample Elevation Water Elevation Benzene Toluene benzene Xylenes gasoline diesel MTBE Dibromide Lead <br /> Well Date (ft ms]) (ft) (ft msl) (pg/L) (pg/L) (pg/L) (gg/L) (pg/L) Gig/L) (µg/L) (µg/L) (µg/L) <br /> VEW-1 07/15/98 NM DRY NC NS NS NS NS NS NS NS NS NS <br /> 10/14/98 DRY NC NS NS NS NS NS NS NS NS NS <br /> 01/26/99 DRY NC NS NS NS NS NS NS NS NS NS <br /> 05/19/99 DRY NC NS NS NS NS NS NS NS NS NS <br /> 07/30/99 DRY NC NS NS NS NS NS NS NS NS NS <br /> 10/28/99 DRY NC NS NS NS NS NS NS NS NS NS <br /> VEW-2 07/15/98 NM 2601 NC 12 <0 5 <0 5 0 84 <50 NA 100 NA NA <br /> 10/14/98 2728 NC <0 5 <0 5 <0 5 <0 5 <50 NA 190 NA NA <br /> 01/26/99 2697 NC 051 <0 5 <0 5 <0 5 <50 NA 100 NA NA <br /> 05/19/99 2556 NC 0 707 <0 5 <0 5 <0 5 <50 NA 359 NA NA <br /> 07/30/99 2666 NC <0 5 <0 5 <0 5 110 65 9b NA 566 b NA NA <br /> 10/28/99 2791 NC <1 0 <1 0 <1 0 <1 0 <50 NA 44 NA NA <br /> Trip Blank 10/14/98 N/A N/A N/A <0 5 <0 5 <0 5 <0 5 <50 NA <2 5 NA NA <br /> 01/26/99 N/A N/A <0 5 <0 5 <0 5 <0 5 <50 NA <2 5 NA NA <br /> 07/30/99 NIA N/A <0 5 <0 5 <0 5 <0 5 <50 NA <2 5 NA NA <br /> 10/28/99 NIA N/A <10 <10 <10 <10 <50 NA <10 NA NA <br /> a=Confirmatory value,calculated by EPA Method 8260,for the sample with the highest value measured at the site by EPA Method 8020 <br /> b=Laboratory reported unidentified hydrocarbons C6-C12 <br /> TPPH=Total purgeable petroleum hydrocarbons <br /> TEPH=Total extractable petroleumm hydrocarbons <br /> MTBE=Methyl tertiary butyl ether br EPA Method 8020 or EPA Method 8021$ <br /> ft msl=Feet relative to mean sea level <br /> NA=Not analyzed <br /> NM=Not measured <br /> NC=Not calculated <br /> NS=Not sampled <br /> N/A=Not applicable <br /> (Page 8 of 8)99 865 x]s <br />