ARCHIVED REPORTS Fourth Quarter 2013

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TABLE IC ADDITIONAL CUMULATIVE GROUNDWATER MONITORING AND SAMPLING DATA-METALS Former Mobil Service Station 99CAS 75 East Alpine Avenue Stockton,California (Page 2 of 4) Well Sampling Arsenic Antimony Cadmium Lead Selenium Thallium ID Date (Ng/L) (Ng/L) (ug/L) (Ng/L) (Ng/L) (ug/L) MW2 05/19/11 30.0 <10.0 <10.0 <15.0 ••- 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 --- MW2 05/04/12 40.2 ••. <10.0 <10.0 <15.0 .-- MW2 08/24/12 28.2 <10.0 <10.0 <15.0 - MW2 10/24/12 37.7 --- <10.0 <10.0 <15.0 MW2 02/01/13 34.1 --- <10.0 <10.0 <15.0 --- MW2 05/03/13 22.0 <10.0 <10.0 <15.0 --- <10.0 <10.0 <15.0 MW2 08/22/13 33.6 --- -- MW2 12/18/13 28.8 <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 0.645] 14.9 0.784j MW3 10/28/09 23.4 .-- 0.796] 26.8 1.00 MW3 01/25/10 21.8 0.889] 29.6 0.795j 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 03/15/12 <10.0 <10.0 <10.0 <15.0 --- MW3 05/03/12 25.7 --- <10.0 <10.0 <15.0 MW3 08/24/12 18.3 ... <10.0 <10.0 <15.0 MW3 10/24/12 n -- MW3 01/31/13 23.4 - <10.0 40.2 <15.0 --- MW3 05/03/13 n --• --- -.. --- MW3 08/21/13 32.5 <10.0 <10.0 <15.0 --- MW3 12/18/13 n --- --- --- --- MW4 06/28/07 -Present Not analyzed for these analytes. MW5 06/28/07 -Present Not analyzed for these analytes.