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TABLE 1 Page 10 of 12 GROUNDWATER DATA SHELL-BRANDED SERVICE STATION 4315 WATERLOO ROAD STOCKTON,CALIFORNIA MTBE MTBE 1,2- Depth to GW Well ID Date TPPH B T E X 8020 8260 TBA DIPS ETBE TAME DCA EDB Ethanol TOC Water Elevation 98/L µ8/L 9$1L µ8/L µ8/L µ8/L µg/L µg/L µ8/L µg/L µSNL µ8/L µg/L µg/L ftMSL ft TOC ft MSL MW-9 3/10/2010 <50 <0.50 <1.0 <1.0 <1.0 - <1.0 <10 <2.0 <2.0 <2.0 <0.50 <1.0 <100 31.92 70.70 -38.78 MW-9 6/21/2010 <50 <0.50 <1.0 <1.0 <1.0 - <1.0 <10 <2.0 <2.0 <2.0 <0.50 <1.0 <100 31.92 66.61 -34.69 MW-9 8/27/2010 <50 <0.50 <1.0 <1.0 <1.0 - <1.0 <10 <2.0 <2.0 <2.0 <0.50 <1.0 <100 31.92 69.39 -37.47 MW-9 12/22/2010 <50 <0.50 <1.0 <1.0 <1.0 - <1.0 <10 <2.0 <2.0 <2.0 <0.50 <1.0 <100 31.92 67.74 -35.82 MW-9 5/25/2011 <50 <0.50 <0.50 <0.50 <1.0 - <1.0 <10 <1.0 <1.0 <1.0 <0.50 <0.50 <150 31.92 60.95 -29.03 MW-9 11/4/2011 <50 <0.50 <0.50 <0.50 <1.0 - <1.0 <10 <1.0 <1.0 <1.0 <0.50 <0.50 <150 31.92 63.10 -31.18 MW-9 3/1/2012 - - - - - - - - - - - - - - 31.92 60.85 -28.93 MW-10 11/9/2009 - - - - - - - - - - - - - - 32.43 75.80 -43.37 MW-10 11/13/2009 <50 <0.50 <1.0 <1.0 <1.0 - 6.1 <10 <2.0 <2.0 <2.0 8.0 <1.0 <100 32.43 75.61 -43.18 '. MW-10 3/10/2010 <50 <0.50 <1.0 <1.0 <1.0 - 3.2 <10 <2.0 <2.0 <2.0 3.6 <1.0 <100 32.43 71.57 -39.14 MW-10 6/21/2010 <50 <0.50 <1.0 <1.0 <1.0 - 4.6 <10 <2.0 <2.0 <2.0 3.7 <1.0 <100 32.43 67.50 -35.07 MW-10 8/27/2010 <50 <0.50 <1.0 <1.0 <1.0 - 6.4 <10 <2.0 <2.0 <2.0 4.6 <1.0 <100 32.43 70.20 -37.77 MW-10 12/22/2010 98 <0.50 <1.0 <1.0 <1.0 - 110 <10 <2.0 <2.0 <2.0 3.3 <1.0 <100 32.43 68.54 -36.11 MW-10 5/25/2011 <50 <0.50 <0.50 <0.50 <1.0 - 44 ' <10 <1.0 <1.0 <1.0 1.0 <0.50 <150 32.43 61.40 -28.97 MW-10 11/4/2011 130 <1.0 <1.0 <1.0 <2.0 - 170 <20 <2.0 <2.0 <2.0 1.7 <1.0 <300 32.43 63.72 -31.29 ? MW-10 3/1/2012 120 <0.50 <0.50 <0.50 <1.0 - 140 <10 <0.50 <0.50 <0.50 1.0 <0.50 <150 32.43 61.59 -29.16 Notes and Abbreviations: TPPH=Total petroleum hydrocarbons as gasoline by EPA Method 8260B;prior to July 23,2001,analyzed by EPA Method 8015. TEPH=Total petroleum hydrocarbons as diesel by modified EPA Method 8015. BTEX=Benzene,toluene,ethylbenzene,xylenes by EPA Method 8260B;prior to July 23,2001,analyzed by EPA Method 8020. MTBE=Methyl tertiary butyl ether DIPE=Di-isopropyl ether,analyzed by EPA Method 8260B ETBE=Ethyl tertiary butyl ether,analyzed by EPA Method 8260B TAME=Tertiary amyl methyl ether,analyzed by EPA Method 8260E TBA=Tertiary butyl alcohol or Tertiary butanol,analyzed by EPA Method 8260B CRA241359(14)