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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 3 of 8)
<br /> Well Sampling DIPE ETBE TAME TBA 1,2-DCA EDB Ethanol Methanol
<br /> ID Date (ug/L) (Ng/L) (Ng/L) (ug/L) (ug/L) (ug/L) (sig/L)
<br /> MW4 04/07/10 <1,000 <1,000 <1,000 <20,000 - -- <100,000 <100
<br /> MW4 08/09/10 <1,000 <1,000 <1,000 <20,000 - --- <100,000 <100
<br /> MW4 10/05/10 <1,000 <1,000 <1,000 <20,000 -- --- <100,000 <100
<br /> MW4 02/09/11 <1,000 <1,000 <1,000 <20,000 <1,000 <1,000 <100,000 <100
<br /> MW4 05/19/11 <1,000 <1,000 <1,000 <10,000 <1,000 <1,000 ---
<br /> --
<br /> MW4 09/22/11 1 --- - ---
<br /> MW4 11/30/11 <1,000 <11,000 <1,000 <10,000 <1,000 <1,000 -- ---
<br /> MW5 03/26/07 <10,000 <10,000 <10,000 <10,000 <10,000 <10,000 <50,000 <1,000
<br /> MW5 06/28/07 <2,000 <2,000 <2,000 <2,000 <2,000 <2,000 <10,000 <1,000
<br /> MW5 09/12/07 <1,000 <1,000 <1,000 <1,000 <1,000 <1,000 <5,000 <1,000
<br /> MW5 11/26/07 <1,000 <1,000 <1,000 <1,000 <1,000 <1,000 <5,000 <1,000
<br /> MW5 02/28/08 <0.500 <0.500 <0.500 <10.0 <0.500 <0.500 <100 <5,000
<br /> MW5 05/29/08 <0.500 <0.500 <0.500 <10.0 <0.500 <0.500 <100 <5,000
<br /> MW5 08/27/08 <1.0 <1.0 <1.0 <40 1.4 <1.0 <200 <100
<br /> MW5 11/13/08 <0.50 <0.50 <0.50 <20 1.2 <0.50 <100 <500
<br /> MW5 01/28/09 <5.0 <5.0 <5.0 <100 <5.0 <5.0 <500 <100
<br /> MW5 04/29/09 <25 <25 <25 <500 <25 <25 <2,500 <100
<br /> MW5 07/14/09 <10 <10 <10 <200 <10 <10 <1,000 150
<br /> MW5 10/28/09 <10 <10 <10 <200 <10 <10 <1,000 <100
<br /> MW5 01/25/10 <50 <50 <50 <1,000 <50 <50 <5,000 <100
<br /> MW5 04/07/10 <25 <25 <25 <500 -- ---- <2,500 <100
<br /> MW5 08/09/10 <25 <25 <25 <500 - --- <2,500 <100
<br /> MW5 10/06/10 <25 <25 <25 <500 -- - <2,500 <100
<br /> MW5 02/09/11 <10 <10 <10 <200 <10 <10 <1,000 <100
<br /> MW5 05/19/11 <4.0 <4.0 <4.0 55 <4.0 <4.0 --- --
<br /> MW5 09/22/11 <2.0 <2.0 <2.0 <20 <2.0 <2.0
<br /> MW5 12/01/11 <2.0 <2.0 <2.0 <20 <2.0 <2.0 --- -_-
<br /> MW6 11/26/07 <20 <20 <20 <20 <0.50 <20 <100 <100
<br /> MW6 02/28/08 <10.0 <10.0 <10.0 <10.0 <0.500 <10.0 <100 <5,000
<br /> MW6 05/29/08 <10.0 <10.0 <10.0 <10.0 <0.500 <10.0 <100 <5,000
<br /> MW6 08/27/08 <20 <20 <20 <20 <0.50 <20 <100 <100
<br /> MW6 11/13/08 <20 <20 <20 <20 <0.50 <20 <100 <100
<br /> MW6 01/28/09 <10 <10 <10 <10 <0.50 <10 <50 <100
<br /> MW6 04/29/09 <10 <10 <10 <10 <0.50 <10 <50 <100
<br /> MW6 07/14/09 <10 <10 <10 <10 <0.50 <10 <50 <100
<br /> MW6 10/27/09 <10 <10 <10 <10 <0.50 <10 <50 <100
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