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Page 5 of 6 Table 1 Groundwater Elevation and Analytical Data ARCO Service Station#4932 16 E Harding Way Stockton CA wY 2, -`Well `=r Depth Groundwater -LPH Groundwater Ethyl-- Xylenes �` 113E�3 4'MtBE, Well Date_ -EleAon.i to Water -r_,Elevabon Thickness{ ElevatEon TPI-Ig Benzene Toluene benzene (total) 8020 '(802018260) DO - Number- Sampled„ s x ft,MSL (ft,TOC) (ft,MSL) ft Change(ft) (ppb) ppb (ppb)__ (ppb) (ppb) (ppb) (mglL)` DMW-3 07/12102 P 1149 2894 -1745 000 - 90 <0 50 1 3 <0 50 10 1600 140 2 7 11/20/02 P 3147 -1998 000 -253 <50 <0 50 0 63 <0 50 16 14 16 157 01!30103 P 3070 -1921 000 077 <50 <0 50 <0 50 <0 50 065 32 3 7 4 35 04/28/03 P 2998 -1849 000 072 <50 <0 50 <0 50 <0 50 <0 50 - 5 9 3 13 07128103' P 3150 -2001 000 -152 <50 s <0 50 <0 50 <0 50 <0 50 - 3 0 - 10108-09103 P 33 05 -2156 000 -155 <50 ' <0 50 090 <0 50 1 1 -- 2 4 028 01112/04 P 3249 -21 00 000 0 56 <50 <0 50 <0 50 <0 50 <0 50 - 1 i EW-1 04111/02 P 1183 2795 -1612 0 00 - <200,000 9,900 40,000 4,700 24 000 550,000 520 000 - 07/12/02 P 2904 -1721 0 00 -109 350 000 13 000 49 000 6 100 34,000 320 000 460 000 2 7 11/20/02 3147 -1964 000 -243 Not sampled LPH sheen present 01/30/03 P 2930 -1747 000 217 220 000 8 000 31,000 4 400 23 000 140 000 200 000 0133 04/28/03 2958 -1775 000 -028 Well unable to be sampled connected to remedial system 07!29103' NP 31 09 -1926 000 -151 220 000 ° 3 700 11 000 3200 16 000 - 97 000 - 10/08-09/03 NP 4090 -2907 000 -981 37,000 ' 1,100 1 600 360 2,400 - 25 000 -- 01112104 TIP 3911 -2728 000 179 11,000 <260 <250 <250 280 -- 17,000 EW-2 07/12/02 P 11 22 28 51 -1729 000 - <50 000 <500 <500 <500 <500 56 000 65,000 2 8 11/20/02 P 3120 -1998 000 -269 45 000 z <100 <100 <100 <100 71 000 90 000 000-003 01/30/03 P 3045 -1923 000 075 12,000 2 <50 <50 <50 <50 52 000 61 000 - 04128/03 P 2972 -1850 000 073 51,000 ° <500 <500 <500 <500 -- 55 000 152 07129103' P 3122 -2000 0 00 -150 87 000 ° <500 <500 <500 <500 -- 50 000 -- 10/08/03 NP 3277 -2155 0 00 -155 <50,000 <500 <500 <500 <500 - 23 000 1 57 01112104 P 3221 -2099 000 0 56 15,000 <1000 <1000 <100o <1000 - 38,000 EW-3 09/03/03 NS -- - - - 3 600 <50 56 120 750 - 2700 - 12/03/03 - - - - 640 <50 <50 <10 33 - 240 - 01112I04 P 3178 - - - 150 <10 <10 <10 15 -- 39 - EW-4 09/03/03 NS -- - - - 37 000 <2500 <2500 <2500 <2500 - 100 000 - 12103/03 - - - - 12 000 <1000 <1000 <1000 <1000 - 110 000 - 01112104 P 3240 - - - 30,000 <2500 <2500 <2500 <2500 - 96,000 - EW-5 09/03/03 NS -- - - - 5 800 <100 <100 <100 <100 - 5900 - 12/03/03 - - - 440 <5 0 <5 0 <10 <5 0 - 230 - 01112104 P 32 52 - - - 480 <25 <25 <25 <25 - 1300 - Project/ARCO/4932/RepodsJTables/1004 gwtables4932