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TABLE 4 Page 8 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-3-84 11/26/2008 <50 <0.50 <1.0 <1.0 7.1 <1.0 <10 <2.0 <2.0 <2.0 7.2 <1.0 <100 t <100 21.91 50.44 -28.53 - S-3-84 3/11/2009 <50 <0.50 <1.0 <1.0 <1.0 - <1.0 <10 <2.0 <2.0 <2.0 13 <1.0 <100 t <100 21.91 50.73 -28.82 - S-3-84 5/19/2009 <50 <0.50 <1.0 <1.0 <1.0 <1.0 <10 <2.0 <2.0 <2.0 5.1 <1.0 <100 t <100 21.91 50.71 -28.80 - S-3-84 11/16/2009 <50 <0.50 <1.0 <1.0 <1.0 - <1.0 <10 <2.0 <2.0 <2.0 5.3 <1.0 <100 t <100 21.91 53.19 -31.28 - S-3-84 5/21/2010 <50 <0.50 <1.0 <1.0 <1.0 <1.0 <10 <2.0 <2.0 <2.0 0.61 <1.0 <100 t <100 21.91 50.12 -28.21 - S-3-84 12/30/2010 <50 <0.50 <1.0 <1.0 <1.0 - <1.0 <10 <2.0 <2.0 <2.0 0.60 <1.0 <100 t <100 21.91 48.92 -27.01 - S-3-84 6/6/2011 <50 <0.50 <0.50 <0.50 <1.0 <1.0 <10 <1.0 <1.0 <1.0 42 <0.50 <500 <150 21.91 46.17 -24.26 - S-3-84 12/8/2011 <50 <0.50 <0.50 <0.50 <0.50 - <0.50 <10 <0.50 - - <0.50 <0.50 <10,00ow - 21.91 44.88 -22.97 - S-3-84 6/4/2012 <50 <0.50 <0.50 <0.50 <0.50 - <0.50 <10 0.78 - - 23 <0.50 - - 21.91 43.29 -21.38 - S-3-84 12/17/2012 <50 0.64 <0.50 <0.50 <1.0 - <0.50 <10 0.55 - - 13 <0.50 <500 - 21.91 43.80 -21.89 - S-3-84 6/18/2013 <50 <0.50 <0.50 <0.50 <1.0 - <0.50 <10 <0.50 - - 1.2 <0.50 <500 - 21.91 43.64 -21.73 - S-4 2/18/2000 <50.0 <0.500 <0.500 <0.500 <0.500 - <0.500 <20.0 12.7 <1.00 <1.00 12.3 <0.500 <1000 <100 21.62 47.63 -26.01 - S-4 5/3/2000 <50.0 <0.500 0.851 <0.500 2.99 <2.50 <2.00 <100 7.73 <2.00 <2.00 8.06 <2.00 - <1000 21.62 45.35 -23.73 - S-4 8/2/2000 <50.0 <0.500 <0.500 <0.500 <0.500 <2.50 1.33c <20.0* 7.16* <1.00* <1.00* 7.50* <1.00* - - 21.62 46.75 -25.13 - S-4 d 11/20/2000 <50 <0.50 <0.50 <0.50 <0.50 - 1.5 <5.0 9.0 <0.50 <0.50 10 <0.50 - - 21.62 48.76 -27.14 - S-4 2/5/2001 <50.0 <0.500 <0.500 <0.500 <0.500 <2.50 <2.00 <200 8.52 <2.00 <2.00 <2.00 <2.00 - - 21.62 47.74 -26.12 - S-4 5/14/2001 <50 <0.50 <0.50 <0.50 <0.50 - <0.50 <5.0 8.20 <0.50 <0.50 9.0 <0.50 - - 21.62 47.43 -25.81 - S-4 8/30/2001 <50 <0.50 <0.50 <0.50 <0.50 - <0.50 <50 7.0 <2.0 <2.0 12 <2.0 - - 21.62 51.32 -29.70 - S-4 11/28/2001 <50 <0.50 <0.50 <0.50 <0.50 - <0.50 <50 7.3 <2.0 <2.0 10 <2.0 - <500 21.62 52.43 -30.81 - S-4 2/18/2002 <50 <0.50 <0.50 <0.50 <0.50 - <0.50 <50 5.3 <2.0 <2.0 8.3 <2.0 - - 22.29 51.10 -28.81 - S-4 5/1/2002 110 2.1 2.3 0.62 6.7 - <0.50 <50 6.9 <2.0 <2.0 14.0 <2.0 - - 22.29 50.74 -28.45 - S-4 8/8/2002 62 4.3 0.55 <0.50 2.2 - 4.8 <50 6.3 <2.0 <2.0 13 <2.0 - - 22.29 53.58 -31.29 - S-4 10/28/2002 71 <0.50 <0.50 <0.50 <0.50 - 0.57 <50 6.0 <2.0 <2.0 13 <2.0 <1000 <500 22.29 55.68 -33.39 - S-4 1/6/2003 51 <0.50 <0.50 <0.50 <0.50 - <5.0 - - - - - - - - 22.29 54.61 -32.32 - S-4 5/14/2003 50 <0.50 <0.50 <0.50 <0.50 - <5.0 - - - - 8.9 - - - 22.29 52.63 -30.34 - S-4 8/14/2003 <50 <0.50 <0.50 <0.50 <1.0 - <0.50 <5.0 6.3 <2.0 <2.0 11 <0.50 <500 <50 22.29 54.85 -32.56 - S-4 12/30/2003 <50 <0.50 <0.50 <0.50 <1.0 - <0.50 <5.0 6.1 <2.0 <2.0 7.3 <0.50 <500 <50 22.29 56.76 -34.47 - S-4 2/5/2004 <50 <0.50 <0.50 <0.50 <1.0 - <0.50 <5.0 5.1 <2.0 <2.0 6.8 <0.50 <500 <50 22.29 55.22 -32.93 - S-4 5/5/2004 <50 <0.50 <0.50 <0.50 <1.0 - <0.50 <5.0 6.6 <2.0 <2.0 8.1 <0.50 <500 <50 22.29 54.10 -31.81 - S-4 7/26/2004 <50 <0.50 <0.50 <0.50 <1.0 - <0.50 <5.0 5.7 <2.0 <2.0 7.8 <0.50 <500 <50 22.29 55.53 -33.24 - S-4 11/10/2004 Insufficientwatel - - - - - - - - - - - - - 22.29 56.56 -34.27 - S-4 2/21/2005 51 g <0.50 <0.50 <0.50 <1.0 - 0.80 <5.0 3.8 <2.0 <2.0 2.7 <0.50 <500 <50 22.29 55.98 -33.69 - S-4 6/30/2005 <50 <0.50 <0.50 <0.50 <1.0 - <0.50 <5.0 7.1 <2.0 <2.0 6.5 <0.50 <500 <50 22.29 53.15 -30.86 - S-4 08/18/2005 h <50 <0.50 <0.50 <0.50 <1.0 - <0.50 <5.0 4.8 <2.0 <2.0 4.3 <0.50 <500 <50 22.29 54.32 -32.03 - S-4 12/29/2005 h <50 <0.50 0.53 <0.50 <1.0 - 1.0 <5.0 4.8 <2.0 <2.0 6.4 <0.50 <500 <50 22.29 54.10 -31.81 - S-4 3/6/2006 680 <0.50 <1.0 <1.0 <1.0 - <1.0 <10 4.5 <2.0 <2.0 5.6 <1.0 <100 <100 22.29 51.84 -29.55 - CRA240797(18)