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TABLE 4 Page 10 of 13 GROUNDWATER DATA SHELL-BRANDED SERVICE STATION 2494 EAST FREMONT STREET STOCKTON,CALIFORNIA MTBE MTBE 1,2- Depth to GW SPH Well ID Date TPHg B T E X 8020 8260 TBA DIPS ETBE TAME DCA EDB Methanol Ethanol TOC Water Elevation Thickness (pg/L) (pg/L) (pg/L) (pg/L) (pg/L) (PRE) (PNE) (,ug/L) (PNE) (PRE) (pg/L) (pg/L) (pg/L) (pg/L) (pg/L) (ft MSL) (ft TOC) (ft MSL) (feet) S-4-83 9/26/2006 <50 <0.50 <0.50 <0.50 <1.0 <0.50 <5.0 <2.0 <2.0 <2.0 27 <0.50 <100 <50 22.43 48.83 -26.40 - S-4-83 12/11/2006 62 <0.50 1.4 <0.50 1.4 - <0.50 <5.0 <2.0 <2.0 <2.0 29 <0.50 <100 <50 22.43 48.23 -25.80 - S-4-83 3/15/2007 <50 <0.50 r <0.50 r 1.6 r 2.0 r <0.50 r <20 r 2.5 r <0.50 r <0.50 r 42 r <0.50 r <100 <100 r 22.43 46.82 -24.39 - S-4-83 6/5/2007 <50 t <0.50 <1.0 <1.0 <1.0 <1.0 <1.0 <10 3.3 <2.0 <2.0 55 <1.0 <100 t <100 22.43 46.55 -24.12 - S-4-83 9/17/2007 120 t,u 6.0 13 3.5 16.6 - <1.0 <10 0.65 v <2.0 <2.0 50 <1.0 <100 t 130 22.43 46.34 -23.91 - S-4-83 12/13/2007 <50 t <0.50 <1.0 <1.0 <1.0 - <1.0 <10 6.0 <2.0 <2.0 60 <1.0 <100 t 250 22.43 48.73 -26.30 - S-4-83 3/20/2008 <50 t <0.50 <1.0 <1.0 <1.0 - <1.0 <10 <2.0 <2.0 <2.0 39 <1.0 <100 t <100 22.43 47.32 -24.89 - S-4-83 6/13/2008 65 <0.50 <1.0 <1.0 <1.0 - <1.0 <10 2.6 <2.0 <2.0 42 <1.0 <100 t <100 22.43 47.48 -25.05 - S-4-83 9/11/2008 64 <0.50 <1.0 <1.0 <1.0 - <1.0 <10 4.0 <2.0 <2.0 60 <1.0 140 t <100 22.43 50.30 -27.87 - S-4-83 11/26/2008 <50 <0.50 <1.0 <1.0 <1.0 - <1.0 <10 <2.0 <2.0 <2.0 46 <1.0 <100 t <100 22.43 51.00 -28.57 - S-4-83 3/11/2009 120 <0.50 <1.0 <1.0 <1.0 - <1.0 <10 8.9 <2.0 <2.0 83 <1.0 <100 t <100 22.43 51.25 -28.82 - S-4-83 5/19/2009 <50 <0.50 <1.0 <1.0 <1.0 - <1.0 <10 4.7 <2.0 <2.0 25 <1.0 <100 t <100 22.43 51.27 -28.84 - S-4-83 11/16/2009 <50 <0.50 <1.0 <1.0 <1.0 - <1.0 <10 <2.0 <2.0 <2.0 14 <1.0 <100 t <100 22.43 53.69 -31.26 - S-4-83 5/21/2010 97 1.2 1.4 1.6 24 - <1.0 <10 <2.0 <2.0 <2.0 7.2 <1.0 <100 t <100 22.43 50.56 -28.13 - S-4-83 12/30/2010 <50 <0.50 <1.0 <1.0 <1.0 - <1.0 <10 <2.0 <2.0 <2.0 6.1 <1.0 <100 t <100 22.43 49.55 -27.12 - S-4-83 6/6/2011 <50 <0.50 <0.50 <0.50 <1.0 - <1.0 <10 1.5 <1.0 <1.0 61 <0.50 <500 <150 22.43 46.68 -24.25 - S-4-83 12/8/2011 <50 <0.50 <0.50 <0.50 <0.50 - <0.50 <10 1.34 - - <0.50 <0.50 <10,000w - 22.43 45.43 -23.00 - S-4-83 6/4/2012 <50 <0.50 <0.50 <0.50 <0.50 - <0.50 <10 1.0 - - 52 <0.50 - - 22.43 43.80 -21.37 - S-4-83 12/17/2012 <50 <0.50 <0.50 <0.50 <1.0 - <0.50 <10 0.77 - - 3.1 <0.50 <500 - 22.43 44.30 -21.87 - S-4-83 6/18/2013 <50 <0.50 <0.50 <0.50 <1.0 - <0.50 <10 <0.50 - - 0.94 <0.50 860 - 22.43 44.20 -21.77 - S-5 12/22/2003 - - - - - - - - - - - - - - - 21.94 55.44 -33.50 - S-5 12/30/2003 <50 <0.50 <0.50 <0.50 <1.0 <0.50 <5.0 2.5 <2.0 <2.0 49 <0.50 <500 <50 21.94 55.33 -33.39 - S-5 2/5/2004 <50 <0.50 <0.50 <0.50 <1.0 - <0.50 <5.0 2.7 <2.0 <2.0 45 <0.50 <500 <50 21.94 54.86 -32.92 - S-5 5/5/2004 <50 <0.50 <0.50 <0.50 <1.0 <0.50 <5.0 3.0 <2.0 <2.0 37 <0.50 <500 <50 21.94 53.70 -31.76 - S-5 7/26/2004 62 e <0.50 <0.50 <0.50 <1.0 - <0.50 <5.0 2.8 <2.0 <2.0 42 <0.50 <500 <50 21.94 55.27 -33.33 - S-5 11/10/2004 84 g <0.50 <0.50 <0.50 <1.0 <0.50 <5.0 6.4 <2.0 <2.0 77 <0.50 <500 <50 21.94 57.45 -35.51 - S-5 2/21/2005 65 g <0.50 <0.50 <0.50 <1.0 - <0.50 <5.0 5.4 <2.0 <2.0 61 <0.50 <500 <50 21.94 55.68 -33.74 - S-5 6/30/2005 57 g <0.50 <0.50 <0.50 <1.0 <0.50 <5.0 3.5 <2.0 <2.0 46 <0.50 <500 <50 21.94 52.84 -30.90 - S-5 08/18/2005 h <50 <0.50 <0.50 <0.50 <1.0 - <0.50 <5.0 3.0 <2.0 <2.0 34 <0.50 <500 <50 21.94 54.08 -32.14 - S-5 12/29/2005 h 59 <0.50 0.50 <0.50 <1.0 <0.50 <5.0 6.2 <2.0 <2.0 71 <0.50 <500 <50 21.94 53.72 -31.78 - S-5 3/6/2006 <50 <0.50 <1.0 <1.0 <1.0 - <1.0 <10 6.1 i <2.0 <2.0 63 <1.0 <100 <100 21.94 51.62 -29.68 - S-5 6/27/2006 70 <0.50 <0.50 <0.50 <1.0 <0.50 <5.0 5.4 <2.0 <2.0 56 <0.50 <100 j <50 21.94 47.84 -25.90 - S-5 9/26/2006 110 <0.50 <0.50 <0.50 <1.0 - <0.50 <5.0 7.0 <2.0 <2.0 72 <0.50 <100 <50 21.94 48.43 -26.49 - S-5 12/11/2006 120 <0.50 <0.50 <0.50 <1.0 - <0.50 <5.0 8.7 <2.0 <2.0 97 <0.50 <100 <50 21.94 47.66 -25.72 - S-5 3/15/2007 51 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <20 8.8 <0.50 <0.50 86 <0.50 <100 <100 21.94 46.41 -24.47 - S-5 6/5/2007 <50 t <0.50 <1.0 <1.0 <1.0 <1.0 <1.0 <10 7.4 <2.0 <2.0 78 <1.0 <100 t <100 21.94 46.10 -24.16 - CRA240797(18)