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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 /> -redundant-downgradient from well MW-15A ' <br /> MW-16A 20 4 1 -more than two annual monitoring event with less than reporting <br /> limit concentrations <br /> -redundant-downgradient from well MW-15B ' <br /> MW-16B 45 4 1 -two annual monitoring event with less than reporting limit <br /> concentrations <br /> -redundant-downgradient from well MW-13A,and-15A <br /> MW-17A 25 4 1 -more than two annual monitoring event with less than reporting ' <br /> limit concentrations <br /> -- -redundant-downgradient from well MWA 3B and-15B <br /> 1 -more than two annual monitoring event with less than reporting <br /> MWA7B 40 4 limit concentrations MRP- <br /> , <br /> -approved for destruction in the 05/29/2002 RP <br /> -- - -redundant-downgradient from well MW-13A,and-15A <br /> 1 -more than two annual monitoring event with less than reporting <br /> MW-18A 20 4 limit concentrations , <br /> -approved for destruction in the 05/29/1002 MRP <br /> -- -redundant-downgradient from well MW-138,and-15B <br /> 1 -more than two annual monitoring event with less than reporting <br /> MW-18B 45 4 limit concentrations <br /> -approved for destruction in the 05/29/2002 MRP ' <br /> -redundant-downgradient from well MW-13A,and-15A <br /> 1 -more than two annual monitodng event with less than reporting <br /> MW-19A 15 4 limit ooncent2ttons <br /> -approved for destruction in the 05/29/2002 MRP ' <br /> -redundant-downgradient from well MW-13A,and-15A <br /> MW-20A 20 4 1 -more than two annual monitoring event with less than reporting <br /> limit concentrations ' <br /> 1 -redundant-upgradient from well MW-01A <br /> MW-21AR 25 4 -approved for destruction in the 05/29/2002 MRP <br /> MW 21 B 50 4 1 -redundant-upgredient from well MW-01B ' <br /> -approved for destruction in the 05/29/2002 MRP <br /> MW-22A 15 4 1 -Downgredient control well <br /> MW-23A 20 2 1 -Lateral control well ' <br /> MW-24A 20 2 1 -Downgradient control well <br /> MW-25A 20 2 1 -Downgradient delineation control well <br /> MW 26A 20 2 1 -Up radient control well <br /> MW-27A 20 2 1 -Downgradient control well ' <br /> 1 -A zone piezometer well no longer needed with removal of <br /> P-1 15 2 remediation system <br /> P-2 15 2 <br /> 1 -A zone piezometer well no longer needed with removal of ' <br /> remediation system <br /> 1 -A zone piezometer well no longer needed with removal of ' <br /> P-3AR — — remediation system <br /> 1 -B zone piezometer well no longer needed with removal of <br /> P-3B 25 2 remediation system <br /> 1 -A zone piezometer well no longer needed with removal of ' <br /> P-4 15 2 remediation system <br /> 2 <br /> 1 -A zone piezometer well no longer needed with removal of ' <br /> P-5 15 remediation system <br /> Page 4 of 6 ' <br />