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TABLE 2 GROUNDWATER MONITORING DATA, FORMER EXXON RS 7-3708,2705 COUNTRY CLUB BOULEVARD, STOCKTON, CA <br />Reference <br />Depth to <br />Groundwater <br />Ethyl- <br />Total <br />TPH as <br />Oxygenate <br />Dissolved <br />Monitoring Elevation <br />Groundwater <br />Elevation Benzene Toluene <br />benzene <br />Xylenes <br />gasoline MTBE <br />Compounds <br />Lead <br />Well Date (feet) <br />(feet) <br />(feet) (µg/L) (µg/L) <br />(µg/L) <br />(pg/L) <br />(µg/L) (µg2) <br />(µg/L) <br />(µg/L) <br />VEW1 <br />08/16/01 <br />NM <br />10.43 <br />NC <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5• <br /><50 <br /><5h <br />NA <br />NA <br />VEW1 <br />11/20/01 <br />NM <br />10.31 <br />NC <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><50 <br />6h' <br />NA <br />NA <br />VEW1 <br />03/12/02 <br />NM <br />8.22 <br />NC <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><50 <br />3.4h <br />ND <br />NA <br />VEW1 <br />05/02/02 <br />NM <br />8.45 <br />NC <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><50 <br />5.60h <br />ND <br />NA <br />VEW3 <br />12/01/95 <br />STATION OPERATIONS TRANSFERRED TO NEW WEST PETROLEUM <br />VEW3 <br />03/05/99 <br />NM <br />7.03 <br />NC <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.50 <br />ts <br />NA <br />NA <br />VEW3 <br />05/14/99 <br />NM <br />NM <br />NC <br />NS <br />NS <br />NS <br />NS <br />NS <br />NS <br />NA <br />VEW3 <br />06/04/99 <br />NM <br />NM <br />NC <br />NS <br />NS <br />NS <br />NS <br />NS <br />NS <br />NS <br />NA <br />VEW3 <br />08/31/99 <br />NM <br />NM <br />NC <br />NS <br />NS <br />NS <br />NS <br />NS <br />NS <br />NS <br />NA <br />VEW3 <br />11/23/99 <br />NM <br />NM <br />NC <br />NS <br />NS <br />NS <br />NS <br />NS <br />NS <br />NS <br />NA <br />VEW3 <br />02/10/00 <br />NM <br />NM <br />NC <br />NS <br />NS <br />NS <br />NS <br />NS <br />NS <br />NS <br />NA <br />VEW3 <br />05/17/00 <br />NM <br />NM <br />NC <br />NS <br />NS <br />NS <br />NS <br />NS <br />NS <br />NS <br />NA <br />VEW3 <br />08/07/00 <br />NM <br />dry <br />NC <br />NS <br />NS <br />NS <br />NS <br />NS <br />NS <br />NS <br />NA <br />VEW3 <br />11/06/00 <br />NM <br />NM <br />NC <br />NS <br />NS <br />NS <br />NS <br />NS <br />NS <br />NS <br />NA <br />VEW3 <br />02/26/01 <br />NM <br />6.82 <br />NC <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><50 <br />2.1/<5' <br />NA <br />NA <br />VEW3 <br />05/10/01 <br />NM <br />7.41 <br />NC <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><50 <br /><5h <br />NA <br />NA <br />VEW3 <br />08/16/01 <br />NM <br />dry <br />NC <br />NS <br />NS <br />NS <br />NS <br />NS <br />NS <br />NS <br />NA <br />VEW3 <br />11/20/01 <br />NM <br />dry <br />NC <br />NS <br />NS <br />NS <br />NS <br />NS <br />NS <br />NS <br />NA <br />VEW3 <br />03/12/02 <br />NM <br />7.25 <br />NC <br />12.0 <br /><10 <br /><10 <br /><10 <br />16,600 <br />30,300h <br />80.0m/1,050" <br />NA <br />VEW3 <br />05/02/02 o <br />NM <br />7.50 <br />NC <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />12,900 <br />16,350h <br />1,060" <br />NA <br />a = Total volatile hydrocarbons. <br />b = Result is an estimated value because it exceeds the linear range. <br />c = A typical chromatogram with unidentified peak(s) within the range of gasoline hydrocarbons. Chlorinated hydrocarbons are suspected. <br />A groundwater sample collected from monitoring well MW6 on 4/17/92 contained chlorobenzene and 1,2 -dichlorobenzene. <br />d = A typical chromatogram. Analysis of this sample by EPA Method 624 on 4/17/92 (past EPA recommended holding time) was positive for the <br />g:\projec ts\73708\master\wp\g0502\3 708gwxls <br />Page 16 of 17 <br />