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TABLE 1 Well Construction Details ARCO Service Station No.4932 16 East Harding Way, Stockton,CA Boring Borehole Casing Slot Size Screenetl Filter Pack Bentonite Seal Cement Seal ElevationInterval wall I.D. Constructl (TOC feet) Depth Diameter Diameter Casing Material (finches) Ifeat�as) (feet bas) (feat bgs) (feet bgs) Commen ts on Date (feet bgs) (inches) (Inches) Groundwater Monitoring Wells(MW and DMW) MW-1 8/21/2000 11.49 41.5 10 4 Sch.40 PVC 0.020 1040 8-40 5-8 0-5 A Zone MW-2 8/21/2000 12.01 41.5 10 4 Sch.40 PVC 0.020 1040 840 5-8 05 AZone MW-3 8/22/2000 11.08 41.5 10 4 Sch.40 PVC 0.020 1040 840 5-8 05 A Zone MW-4 8/22/2000 10.88 41.5 10 4 Sch.40 PVC 0.020 540 340 2-3 02 A Zone MW-5 7/13/2001 11.2 40.5 8 2 Sch.40 PVC 0.020 2040 1840 1618 016 AZone MW-6 7/13/2001 10.83 40.5 8 2 Sch.40 PVC 0.020 2040 1840 16-18 0-16 A Zone MW-7 7/13/2001 10.35 40.5 8 2 Sch.40 PVC 0.020 2040 1840 1618 0-16 AZone MW-8 7/13/2001 12.38 40.5 8 2 Sch.40 PVC 0.020 2040 1840 15-18 0-15 A Zone MW-9 7/13/2001 10.83 40.5 8 2 Sch,40 PVC 0.020 2040 1840 16-18 0-16 AZone MW-10 6/10/2002 10.72 41 8 2 Sch.40 PVC 0.020 2040 1841 15.5-18 015.5 AZone MW-11 6/10/2002 10.52 40.5 8 2 Sch.40 PVC 0.020 2040 1840.5 16-18 0-16 AZone DMW-1 3/14/2002 11.34 81 8 2 Sch.40 PVC 0.020 75-80 73-81 70-73 0-70 B Zone DMW-2 6/11/2002 10.48 82.5 8 2 Sch.40 PVC 0.020 77-82 75.5-82.5 72.675.5 0-72.5 B Zone DMW-3 6/12/2002 10.84 83.5 8 2 Sch.40 PVC 0.020 77-82 75.5-83.5 72.5-75.5 0.75.5 B Zone DMW4 1/16/2008 11.12 72 6 2 Sch.40 PVC 0.020 6070 58-70.5 54-58 0-54 B'Zone DMW-5 1/14/2008 12.27 71 6 2 Sch.40 PVC 0.020 60-70 58-71 54-58 654 B'Zone DMW-6 1/9/2008 11.28 75 6 2 Sch.40 PVC 0.020 55-75 53-75 51-53 0-51 B'Zone DMW-7 1/8/2008 10.76 75 6 2 Sch.40 PVC 0.020 55-75 53-75 51-53 051 B'Zone DMW-9 1/11/2008 10.32 71 6 2 Sch.40 PVC 0.020 6070 58-70 55-58 0-55 B'Zone DMW-10 2/12/2008 12.2 70 6 2 Sch.40 PVC 0.020 59.5-69.5 57.5-69.5 53.5-57.5 0-53.8 B'Zone Extraction Wells(EW) 2141 1942 17-19 0-17 AZone E1 3/15/2002 10.96 44 - 6 SS 0.020 W- EW-2 6/13/2002 11.05 50 12 6 SS 0.020 20-40 1841 16-18 016 AZone EW-3 8/5/2003 10.33 41 - 6 SS 0.020 2040 1841 16-18 0-16 AZone EW4 8/6/2003 10.72 41 - 6 SS 0.020 2141 1941 17-19 0-17 AZone • EW-5 8/6/2003 10.79 41 - 6 SS 0.020 2141 1941 17-19 0-17 AZone EW-6 11/13/2002 10.65 40 - 6 SS 0.020 15-35 13-35 11-13 0-11 AZone EW-7 877/2003 10.12 43 - 6 SS 0.020 21.541.5 19.543 17.5-19.5 0-17.5 AZone Vapor Extraction Walls(SVE) S\/E-1 8/22/2000 :110.14 30.5 10 2 Sch.40 PVC 5-30 430 2-402SVE-2 8/6/2003 .16 30 - 2 Sch.40 PVC 0.020 5-30 4.5-30 3.54.5 03.5 AZone 1 of 2