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Table 1 ' <br /> Well Network Recommendations <br /> Union Pacific Railroad Company , <br /> Tracy,CA-Maintenance Facility <br /> Approximate Casing ' <br /> Well Identification Depth Diameter Keep Destroy Rationale <br /> (feet bgs) (inches) <br /> 1 -Vapor point no longer needed with removal of remediation system , <br /> SG-15 10 1 -Unlikely to encounter groundwater <br /> 1 1 -Vapor point no longer needed with removal of remediation system ' <br /> SG-16 10 -Unlikely to encounter groundwater <br /> SG-17 10 1 <br /> 1 -Vapor point no longer needed with removal of remediation system ' <br /> -Unlikely to encounter groundwater <br /> 1 -Vapor point no longer needed with removal of remedlation system <br /> SG-18 10 1 -Unlikely to encounter groundwater <br /> 1 -Vapor point no longer needed with removal of remediation system ' <br /> SGA9 10 1 -Unlikely to encounter groundwater <br /> 1 -Vapor point no longer needed with removal of remediation system ' <br /> SVF�C-1 10 4 -Unlikely to encounter groundwater <br /> SVEX-2 10 2 <br /> 1 -Vapor point no longer needed with removal of remediation system ' <br /> -Unlikely to encounter groundwater <br /> 1 -Vapor point no longer needed with removal of remediation system <br /> SVEX-3 10 2 -Unlikely to encounter groundwater ' <br /> -LNAPL observed during the first quarter of 2010 <br /> TWA 20 4 1 -Source area delineation control wall <br /> -LNAPL observed during the first quarter of 2010 , <br /> TW-2 20 4 1 -Source area delineation control well <br /> TW_2B 45 2 1 -Source area delineation control well ' <br /> TW-3 20 4 1 -Source area delineation control well <br /> -LNAPL observed during the first quarter of 2010 <br /> TW-4 20 4 1 -Source area delineation control well <br /> 1 -— — Va or point no longer needed with removal of remediation s tem <br /> VMP-01 ' <br /> VMP-02 1 -Vapor point no longer needed with removal of remediation s em <br /> VMP-03 — 1 -Vapor point no longer needed with removal of remediation system <br /> VMP-04 — — 1 -Vapor point no longer needed with removal of remediation system <br /> VMP-05 — — 1 -Vapor point no longer needed with removal of remediation system ' <br /> DPEX_1 20 4 1 -Potential future use <br /> DPEX-2 20 4 1 -Potential future use <br /> DPEX-3 20 4 1 -Potential future use <br /> DPEX-4 20 4 1 -Potential future Use ' <br /> DPEX-5 20 4 1 -Potential future use <br /> DPD20 4 1 -Potential future use _ <br /> DPEX-7 20 4 1 -Potential future use <br /> DPEX-8 20 4 1 -Potential future use ' <br /> 127 40 1 87 ITotals <br /> Notes: <br /> 127 wells are depicted on Figures 2 and 3. <br /> TerraNext. 1997.Well and Boring Summary Binder,Southern Pacific Transportation Company,Tracy Yard-Tracy,California. March 21. ' <br /> I <br /> Page 6 of 6 ' <br />