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Table 4 DRAFT <br /> Well Construction Data <br /> for Selected Wells Located in the Study Area <br /> Lincoln Center, Stockton, California <br /> Estimated Top-of-Casing Depth of Screened Filter Pack Seal <br /> Date Drilling Subcontractor/ Screened' Boring Diameter Elevations Casing Screen Diameter Boring Interval Interval Interval <br /> Well ID Installed Consultant Geologic Unit (inches) (feet MSL) Material (inches) (feet bgs) (feet bgs) (feel bgs) ((eet bgs) <br /> Chevron Monitoring Wells' <br /> CHMW-1 (A) 1/8/87 Sierra Pacific/GTI Azone 7.5 - PVC 2 60 40-60 39-60 0-39 <br /> Soils Exploration <br /> CHMW-2 7/24/90 Services/Siena Azone 10 11.62 PVC 4 71 50-70 47-71 0-4741 <br /> Soils Exploration <br /> CHMW-3 7/27/90 Services/Sierra A zone 10 12.67 PVC 4 71.5 48-68 46-68 0-46 <br /> Soils Exploration <br /> CHMW-4 7/29/90 Services/Sierra A zone 10 13.01 PVC 4 69.5 48-68 45.5-68 0-45.5 <br /> Soils Exploration <br /> CHMW-5 1 6/5/90 1 Services/Sierra A zone 10 12.51 PVC 4 69 49-69 46-69 0-46 <br /> Soils Exploration <br /> CHMW-6 7/30/92 Services/Sierra A zone 1 8 12.78 PVC 4 71. 1 0-70 48-70 0-48 <br /> Soils Exploration <br /> CHMW-7 8/18/93 Services/Sierra A zone 8 12.69 PVC 4 64.5 44.5-64.5 42-64.5 0-42 <br /> Exxon Monitoring Wells 4 <br /> EXMW-1 12/7/88 Hogate ExplorationAVEGE A zone 8 12.45 PVC 2 65 35-65 30-65 0-30 <br /> EXMW-2 12/8/88 Flogate ExploralionAVEGE A zone 8 10.32 PVC 2 65 34-64 26.5-64 0-26.5 <br /> EXMW-3 12/9/88 Hogale Exploration/WEGE A zone 10 11.94 PVC 4 65 35-65 28-65 0-28 <br /> EXMW-4 2/17/89 Hogate Exploration/WEGE Azone 10 11.57 PVC 4 65 35-65 29-65 0-29 <br /> EXMW-5 2/21/89 Hogate ExplorationAVEGE Azone 10 11.84 PVC 4 65 35-65 28-65 0-28 <br /> EXMW-6 2/22/89 Flogate ExploralionAVEGE Azone 10 12.01 PVC 4 65 35-65 28-65 0-28 <br /> EXMW-7 2/24/89 Flogate Exploration/WEGE Azone 10 11.53 PVC 4 65 35-65 28-65 0-28 <br /> EXMW-8 2/17/89 I logate ExploralionAVEGE A zone 10 11.74 PVC 4 65 35-65 31 -65 0-31 <br /> EXMW-9 3/2/89 Hogate Exploration7WEGE A zone 10 10.32 1 PVC 4 65 35-65 28-65 0-29 <br /> EXMW-10 3/3/89 Flogate Exploration/VELE A zone 10 12.62 PVC 4 65 25-65 18-65 0- 18 <br /> EXMW-1 1 9/24/92 PC ExploralionAVEGE A zone 10 12.81 PVC 4 65 50-70 45-70 0-45 <br /> EXMW-12 9/26/92 PC ExploralionAIVEGE A zone 10 12.38 PVC 4 65 SO-70 45-70 0-45 <br /> 3966MW.XLS/Sheel l 3 of 4 3/13/97 <br />