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TABLE 2 GROUNDWATER MONITORING DATA,FORMER EXXON RS 7-3708,2705 COUNTRY CLUB BOULEVARD, STOCKTON,CA Reference Depth to Groundwater Ethyl- Total TPH as Other Oxygenates Dissolved Monitoring Elevation Groundwater Elevation Benzene Toluene benzene Xylenes gasoline MTBE and Additives Lead Welt Date (feet) (feet) (feet W/O (µ IL) (WO ( ) Gt ) ( ) (µ ) MW6 09/23/02 -048 740 -788 <0 5 <0 5 <0 5 <0 5 <50 3 24h ND NA MW6 12/06/02 -048 741 -789 <0 5 <0 5 <0 5 <0 5 <50 2 00h ND NA MW6 03/17/03 -048 620 -668 <0 5 <0 5 <0 5 <0 5 <50 2 60h ND NA MW6 05/29/03 -048 675 -723 <0 5 <0 5 <0 5 <0 5 <50 5 80h ND NA MW6 09/18/03 -048 820 -868 <0 5 <0 5 <0 5 <0 5 <50 0 70' ND NA MW6 12/09/03 -048 727 -775 <0 5 05 <0 5 <0 5 <50 3 70h ND NA MW6 03/03/04 p -048 484 -532 <0 5 <0 5 <0 5 <0 5 <50 340 h ND NA MW6 03/22/04 -048 526 -574 <0 5 28 <0 5 23 <50 240 b ND NA MW6 06/01/04 -048 5 52 -600 <0 5 35 <0 5 33 <50 <0 5h ND NA MW6 09/16/04 -048 7.92 -840 <0 5 <0.5 <0.5 <0.5 <50 2.70h ND NA MW7 05/31/94 201 1230 -1029 <0 5 <0 5 <0 5 <0 5 <50 NA NA NA MW7 08/30/94 a 201 14 18 -1217 <0 5 <0 5 <0 5 <0 5 <50 NA NA NA MW7 11/22/94 a 201 1464 -1263 <0 5 <0 5 <0 5 <0 5 <50 NA NA NA MW7 01/12/95 a 201 1339 -1138 <0 5 <0 5 <0 5 <0 5 <50 NA NA NA MW7 03/31/95 201 NM NC NS NS NS NS NS NS NS NS MW7 04/05/95 201 930 -729 <0 5 <0 5 <0 5 <0 5 <50 NA NA NA MW7 07/14/95 201 NM NC <0 5 <0 5 <0 5 <0 5 <50 NA NA NA MW7 07/17/95 201 1107 -906 NS NS NS NS NS NS NS NS MW7 10/05/95 201 1304 -1103 <0 5 <0 5 <0 5 <0 5 <50 NA NA NA MW7 12/01/95 STATION OPERATIONS TRANSFERRED TO NEW WEST PETROLEUM MW7 04/02/96 201 NM NC NS NS NS NS NS NS NS NS MW7 07/31/96 201 1081 -880 <0 5 <0 5 <0 5 <0 5 <50 NA NA NA MW7 10/23/96 201 1184 -983 <0 5 <0 5 <0 5 <0 5 <50 <5 0 NA NA MW7 02/07/97 201 674 -473 <0 5 <0 5 <0 5 <0 5 <50 NA NA NA MW7 05/30/97 201 930 -729 <0 5 <0 5 <0 5 <0 5 <50 <2 5 NA NA g 1profects1737081masterlwp1g0904U708gw As Page 14 of 23