ARCHIVED REPORTS First Quarter 2012

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TABLE IC ADDITIONAL CUMULATIVE GROUNDWATER MONITORING AND SAMPLING DATA-METALS Former Mobil Service Station 99CAS 75 E.Alpine Avenue Stockton,California (Page 2 of 3) Well Sampling Arsenic Antimony Cadmium Lead Selenium Thallium ID Date (Ng/L) (N9/L) (u9/L) (N9/L) (N9/L) (u9/L) MW2 09/22/11 27.3 - <10.0 <10.0 <15.0 - MW2 12/01/11 <10.0 - <10.0 <10.0 <15.0 - MW2 03/15/12 <10.0 - <10.0 <10.0 <15.0 -- MW3 06/28/07 7 - 0.57 <0.50 <1.0 - MW3 09/12/07 12 - <0.25 3.4 <1.0 - MW3 11/26/07 21 -- 1.2 21 <2.5 - MW3 02/28/08 27.2 - <1.00 17.5 <2.00 - MW3 05/29/08 h 9.26 - <1.00 <2.00 <2.00 - MW3 08/27/08 19 - 0.74 9.5 <2.5 - MW3 11/13/08 22 - 0.29 5.8 <2.5 MW3 01/28/09 17.9f - <5.00 9.22 4.45j MW3 04/29/09 18.1 - 0.212j 5.52 1.15 - MW3 07/14/09 25.0 - 0.645j 14.9 0.784] MW3 10/28/09 23.4 - 0.796j 26.8 1.00 --- MW3 -- MW3 01/25/10 21.8 -- 0.889j 29.6 0.795] - MW3 04/07/10 18.6 - 2.06 39.6 <1.00 -- MW3 08/10/10 30.2 - 1.07 29.7 <1.00 - MW3 10/06/10 27.5 - <1.00 15.9 <1.00 - MW3 02/09/11 22.9 - 0.612j 15.4 <1.00 -- MW3 05/19/11 <10.0 - <10.0 <10.0 <15.0 - MW3 09/22/11 16.3 - <10.0 <10.0 <15.0 - MW3 12/01/11 <10.0 - <10.0 <10.0 <15.0 - MW3 03115/12 <10.0 - <10.0 410.0 <15.0 --- MW4 06/28/07 Present Not analyzed for these analytes. MW5 06/28/07 Present Not analyzed for these analytes. MW6 06/28/07 Present Not analyzed for these analytes. MW7 06/28/07 Present Not analyzed for these analytes. MW8 06/28/07 Present Not analyzed for these analytes. DW1 06/28/07 Present Not analyzed for these analytes. DW2 06/28/07 Present Not analyzed for these analytes. DW3 06/28/07 Present Not analyzed for these analytes. DW4 06/28/07 Present Not analyzed for these analytes. EX1 06/28/07 -Present Not analyzed for these analytes. EX2 06/28/07 Present Not analyzed for these analytes.