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Table 4 Groundwater Elevation and Analytical Data ARCO Station#548 1612 West Hammer Lane Stockton,California Calc. TOC Depth to GW TOTAL P/ Elevation Water Elev. TPI-Ig BENZENE TOLUENE ETHYLBENZENE XYLENES MTBE DO Well No. Sampling Date NP (ft MSL) (ft BGS) (tt MSL) (pg7L) (pg7L) (}igIL) (NgIL) (Ng1L) (Pg[L) (mglL) Comments VW-2 912911996 NP 29.01 13,200 822 <12.5 1,370 754 <125 No FP,No S,Yes O,[41] VW-2 _12/30N998 NP 27.47 8,950 778 -2 1 18n 339 <200 No FP No S Yes_0,[41j__ VW-2 313111999 25.21 No FP,No S,No O Not scheduled for sampling_ Z VW-2 6128119913 26.35 No FP No S No O Not scheduled for sam lin VW-2 911011x99 29.29 No FP No S No O Not scheduled for sampli" 2Z VW-2 121131Tc.39 28.43 I -__- No FP,No S,No O Not scheduled for same; VW-2 3P[812000 _ 25.24 I __ No FP No S,No O Not scheduled for samplingi VW-2 612612000 26.10 No FP,No S,No O Not scheduled for sampGn� VW-2 9128/2000 28.69 No FP,No S,No O Nat scheduled for sampling VW-2 12!1812000 26.51 No FP No S,No O Not scheduled For sampling UW_2 31.1412001 24;40 No FP No S:No O Not scheduled for sampling VW-2 671912001 25.15 No FP,No S.No O Not scheduled for sampling VW-2 9111/2001 29.40 No FP No S No O Not scheduled for sampling_ VW-2 12!1312001 NP 28.75 180 L31 2.6 1 <0.50 <0.50 <0.50 1.6[2] No FP,No S,No O VW-2 3112/2002 NP 26.46 <50 <0.50 <0.50 <0.50 <0.50 <.50[2] No FP,No S,No O VW-2 6/1712002 NP 28.03 <50 <0_50 <0.50 <0.50 -.0M ?LNo FP,No S,No 0 VW-2 9/9/2002 NP 30.75 200 2.3 0.77 <0.5 <0.5 4.4 No FP,No S,No O VW-2 121412002 NP 30.25 770 1 18 <0.5 <0.5 <0.5 5.4 No FP No S,No O VW-2 3/312003 NP28.86 <100 <1 <1 <1 <1 <12 VW-2 6/3/2003 NP 28.64 <50 <0.5 <0.5 <0.5 <0.5 <0.5121 VW-2 911812003 NP 32.20 I 380 <5 <5 <5 <5 <5[2] - VW-2 12/812003 NP 32.01490 <5 <5 <5 <5 5[2] VW-2 311112004 NP 12.62 28.61 15.99 290 <5 <5 <5 <5 <5[2] VW-2 611112004 NP 12,62 31.30 I -18.68 I <50 I <0.5 <0.5 <0.5 <0.5 <0.5121 2 VW-2 8!312004 P 12.62 32.71 -20.09 600 3.9 <0.5 12 1.1 2.4[2] 1.9 VW-2 12/22/2004 P 12.62 32.03 -19AII 470 <2.5 <2.5 4.2 <2.5 <2,5[21 4,7 VW-2 3/30/2005 P 12.62 29.53 -16.91 1,600 11 4.9 140 170 <2.6[21 1.84 Water Level data collected 3129105 VW-2 6116/2005 P 12.62 28.97 -16.35 1,400 7.6 1.3 8586 2.6[?L 1.15 VW-2 j 91912005 P 12.62 31.11 -18.49 560 2.5 <1 28 33 1,5[21 0.57 VW-2 I 12/772005 P 12.62 30.87 -18.25 1,400 5-1 2.687 110 1A[2] VW-2 3122!2006 P 12.62 26.48 -15.66 1,100 4.2 2.1 72 62 1.6[2] 2.53 IN3P-ARC0104 BP Valley Ponfohol5481Tables406-01L548 Table 1-2-3-4 Page 8 of 14 513112006