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• i ! Table 1 Historical Groundwater Monitoring and Analytical Data 7-Eleven Store#32262 2360 West Grant Line Road Tracy CA Well ID/ Ethyl- 1,2- Dissolved Elevation Date Benzene Toluene Benzene Xylene TPHg MtBE TBA DIPE ETBE TAME DCA EDB Notes Oxygen DTW SPT WTE (TQC) ( ) (N ) (N !L) I (N ) (N !L) (N L) ( IL) (p L) (N f-) ( ) (p ) (N ) (mglL) (feet) (feet) (feet) Grab Water Samples W1 05/03/03 <500 <500 <500 <500 <50,000 510,000 79,000 <500 <500 1,500 - - - - - - W2 05/03/03 <250 <250 <250 <250 <25,000 110,000 23,000 <250 <250 350 - - - - - -- W3 06/02/03 <50 <50 <50 <50 <5,000 26,000 6,600 <50 <50 71 -- Sample Depth CPT-1-60 08/02/04 <0 50 <0 50 <0 50 <0 50 69 074 <5 0 <0 50 <0 50 <0 50 -- - C - 60 - - CPT-1-82 08102/04 <0 50 <0 50 <0 50 <0 50 <50 <0 50 <5 0 <0 50 <0 50 <0 50 -- -- -- 82 Sample Depth CPT-2-65 08/02/04 <0 50 <0 50 <0 50 <0 50 <50 <0 50 <50 <0 50 <0 50 <0 50 - - -- 65 -- -- CPT-2-81 08/02/04 <0 50 <0 50 <0 50 <0 50 <50 <0 50 <50 <0 50 <0 50 <0 50 -- -- - 81 -- - TP-1 02/04/04 <0 50 <0 50 <0 50 <0 50 <50 31 <50 <0 50 <0 50 <0 50 - - - - - -- 04/26/04 <0 50 <0 50 <0 50 <0 50 <50 12 <50 <0 50 <0 50 <0 50 -- -- -- 887 000 - 07/30/04 <0 50 <0 50 <0 50 <0 50 <50 97 <50 <0 50 <0 50 <0 50 <0 50 <0 50 a 02 562 000 -- 08/12/04 <20 <20 <20 <20 <2,000 7,400 <200 <20 <20 22 - - - - - - 08/13104 <10 <10 <10 <10 <1,000 5,400 <100 <10 <10 10 10/28/04 <0 50 <0 50 <0 50 <0 50 <50 42 <5 0 <0 50 <0 50 <0 50 - - 02 818 000 -- 01/24/05 <0 50 <0 50 <0 50 <0 50 <50 18 <5 0 <0 50 <0 50 <0 50 - - - 871 000 - 05/09105 <0 50 <0 50 <0 50 <0 50 <50 1 8 <5 0 <0 50 <0 50 <0 50 <0 50 <0 50 - 566 000 -- 07/26/05 <0 50 <0 50 <0 50 <0 50 <50 1 0 <5 0 <0 50 <0 50 <0 50 - -- 16 880 000 - 10/28/05 <0 50 <0 50 <0 50 <0 50 <50 1 2 <50 <0 50 <0 50 <0 50 -- -- 22 880 000 - BT-1 1 09/96/05 I U-ElevenV-11 Stores1322621TablesQ2262 Current Groundwater AsHistoncal Water Page i of 5