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TABLE 1B <br /> ADDITIONAL CUMULATIVE GROUNDWATER MONITORING AND SAMPLING DATA <br /> Former Mobil Service Station 99CAS <br /> 75 E.Alpine Avenue <br /> Stockton,California <br /> (Page 5 of 8) <br /> Well Sampling DIPE ETBE TAME TBA 1,2-DCA EDB Ethanol Methanol <br /> ID Date (u9/L) (N9/L) (ug/L) (u9/L) (Pg/L) (Ng/L) (ug/L) (u9/L) <br /> DW1 02/23/09 <50 <50 <50 <1,000 <50 <50 <5,000 - <br /> DW1 04/29/09 <250 <250 <250 <5,000 <250 <250 <25,000 <100 <br /> DW1 07/14/09 <50 <50 <50 <1,000 <50 <50 <5,000 510 <br /> DW1 10/27/09 <25 <25 <25 <500 48 <25 <2,500 <100 <br /> DW1 01/25/10 <12 <12 <12 <250 <12 <12 <1,200 <100 <br /> DW1 04/07/10 <10 <10 <10 <200 -- --- <1,000 <100 <br /> DW1 08/10/10 <10 <10 <10 <200 --- --- <1,000 <100 <br /> DW1 10/05/10 <10 <10 <10 <200 --- --- <1,000 <100 <br /> DW1 02/09/11 <10 <10 <10 <200 21 <10 <1,000 <100 <br /> DW1 05/19/11 <10 <10 <10 <100 22 <10 - -- <br /> DW1 09/22/11 I --- ___ - <br /> DW1 12/01/11 <5.0 <5.0 <5.0 <50 15 <5.0 --- _ <br /> DW2 02/23/09 <2.0 <2.0 <2.0 <40 <2.0 <2.0 <200 - <br /> DW2 04/29/09 <0.50 <0.50 <0.50 <10 <br /> 0.11 <0.50 <50 <100 <br /> DW2 07/14/09 <0.50 <0.50 <0.50 <10 <0.50 <0.50 <50 680 <br /> DW2 10/28/09 <0.50 <0.50 <0.50 <10 0.092j <0.50 <50 <100 <br /> DW2 01/25/10 <0.50 <0.50 <0.50 <10 <0.09' <br /> 1 0.50 <50 <100 <br /> DW2 04/07/10 <0.50 <0.50 <0.50 <10 --- <50 <100 <br /> DW2 08/10/10 <0.50 <0.50 <0.50 <10 - <50 <100 <br /> DW2 10/06/10 <0.50 <0.50 <0.50 <10 --- --- <50 <100 <br /> DW2 02/09/11 <0.50 <0.50 <0.50 <10 <0.50 <0.50 <50 <100 <br /> DW2 05/19/11 <0.50 <0.50 <0.50 30 0.76 <0.50 --- -- <br /> DW2 09/22/11 <0.50 <0.50 <0.50 <5.0 <0.50 <0.50 --- <br /> DW2 12/01/11 <0.50 <0.50 <0.50 <5.0 <0.50 <0.50 --- ._ <br /> DW3 02/23/09 <25 <25 <25 <500 <25 <25 <2,500 - <br /> DW3 04/29/09 <5.0 <5.0 <5.0 < <br /> 5. 100 <5.0 <5.0 <500 <100 <br /> DW3 07/14/09 <5.0 <5.0 <5.0 <100 <5.0 <5.0 <500 180 <br /> DW3 10/28/09 <5.0 <5.0 <5.0 <100 <5.0 <5.0 <500 <100 <br /> DW3 01/25/10 <10 <10 <10 <200 <10 <10 <1,000 <100 <br /> DW3 04/07/10 <10 <10 <10 <200 - --- <1,000 <100 <br /> DW3 08/10/10 <10 <10 <10 <200 -- -- <1,000 <100 <br /> DW3 10/06/10 <10 <10 <10 <200 --- -- <1,000 <100 <br /> DW3 02/09/11 <10 <10 <10 <200 <10 <10 <1,000 <100 <br /> DW3 05/19/11 <0.50 <0.50 <0.50 <5.0 1.4 <0.50 --- --- <br /> DW3 09/22/11 1 --- _. -- _ <br /> DW3 12/01/11 <0.50 <0.50 <0.50 <5.0 1.0 0.82 ___ <br />