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TABLE 1 GROUNDWATER ELEVATION DATA AND ANALYTICAL SUMMARY . FORMER APACHE PLASTICS FACILITY 2050 EAST FREMONT STREET STOCKTON,CALIFORNIA Depth to Well Groundwater Ethyl- Total Date Water Elevation Elevation TPHG Benzene Toluene benzene Xylenes MTBE WELL# Sampled (ft bgs) (ft msl) (ft msl) (mg/L) (µg/L) (µg/L) (pg/L) (µg/L) (µg/L) MW-1 U 5118101 43 13 1803 -25 10 73 660 160 110 660 <4 0* 1115101 4839 -3036 10 1,300 90 160 830 <5 0* MW-2 U 5118101 4317 1813 -2504 <0 25* <l 0* <1 0* <1 0* <1 0* <1 0* 1115101 4839 -3026 <0 50* <2 5* <2 5* <2 5* 29 <2 5* MW-4 U 5/18/01 4170 1664 -25 06 <0 050 <0 5 0 93 <0 5 <0 5 <0 50 1115101 4691 -3027 <0 050 4 3 13 0 83 5 2 <0 50 MW-5 U 5/18/01 4397 18 94 -25 03 045 3 0 066 16 3 15 066- 11/5/01 66l115/01 49 10 -30 16 <0 050 2 0 5 9 0 75 3 4 <0 50 MW-6 U 5/18101 43 68 1856 -25 12 <0 050 <0 5 <0 5 <0 5 <0 5 <0 50 11/5/01 48 88 -3032 <0 050 067 2 7 <0 5 1 1 <0 50 MW-7 U 5118/01 43 35 1846 -24 89 <0 050 <0 50 <0 50 <0 50 <0 50 <0 50 11/5/01 4851 -30 05 <0 050 <0 50 <0 50 <0 50 <0 50 <0 50 MW-8 L 5/18/01 4297 1789 -25 08 26 3,200 2,200 870 1,890 <10* 1115101 48 13 -3024 58 6,800 6,000 1,700 6,500 <25* MW-9 L 5/18101 4328 1827 -25 01 210 20,000 44,000 3,100 17,500 <200* 11/5/01 4842 -30 15 210 22,000 47,000 3,200 18,900 <250* MW-10 L 5/18101 43 40 1840 -2500 <0 050 090 <0 5 <0 5 <0 5 <0 50 1115101 4870 -3030 0 15 11 35 2 3 14 9 <0 50 MW-1 I L 5118101 4267 1769 -24 98 --0050 <0 50 <0 50 <0 50 <0 50 <0 50 1115101 4665 -2896 <0 050 <0 50 <0 50 <0 50 <0 50 <0 50 MW-12 L 5/18/01 5038 1767 -32 71 <0 050 <0 50 1 7 <0 5 1 81 <0 50 11/5/01 4795 -3028 NA NA NA NA NA NA *=Reporting limits were increased due to high concentrations of target analytes TPHG=Total petroleum hydrocarbons as gasoline MTBE=Methyl tertiary butyl ether U=Screened in upper water bearing zone .L=Screened in lower water bearing zone NA=Not Analyzed Apache Quarterly_Data As Page 1 of I 5TRATU5