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tTable 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 /> ' IGW-7 -Not fitted for injection(2-inch monitoring well not connected to the <br /> 15 2 1 treatment system) <br /> -upgradient injection well near MW-04A and MW-26A <br /> ' -Not fitted for injection(2-inch monitoring well not connected to the <br /> IGW-8 15 2 1 treatment system) <br /> -upgradient injection well near MW-04A and MW-26A <br /> -Not fitted for injection(2-inch monitoring well not connected to the <br /> ' IGW-9 15 2 1 treatment system) <br /> -upgradient injection well near MW-04A and MW-26A <br /> -Not fitted for injection(2-inch monitoring well not connected to the <br /> IGW-10 15 2 1 treatment system) <br /> ' -upgmdient injection well near MW-04A and MW-26A <br /> MW-1A 20 -4 -1 -Upgradient control well <br /> MW-113 45 4 1 Upgradlent control well <br /> MW-1C 90 4 1 -U radiant control well <br /> ' MW-2A 15 4 1 -UPgradient delineation control well <br /> -COPCs not detected greater than their reporting limits for more <br /> MW-2B 45 4 1 than eight years <br /> -TEPH-d affected groundwater present for approximately 20 years <br /> ' -cross-gradient with more than two annual monitoring event with <br /> MW-3A 20 4 1 less than reporting limit concentrations <br /> -approved for destruction in the 05/29/2002 MRP <br /> -cross-gradient with more than two annual monitoring event with <br /> ' MW-3B 45 4 1 less than reporting limit concentrations <br /> -approved for destruction in the 05/29/2002 MRP <br /> -cross-gradient with more than two annual monitoring event with <br /> MW-3C 90 4 1 less than reporting limit concentrations <br /> approved for destruction in the 05/29/2002 MRP <br /> -COPCs not detected greater than their reporting limits for more <br /> MW-4A 15 4 1 than seven years <br /> -TEPH-d affected groundwater present for approximately 20 years <br /> -Redundant Redundant well,keeping well MW-5A <br /> MW-5A _ 15 4 1 -Lateral control well <br /> MW-6A 15 4 1 -LNAPL observed during the first.quarter of 2010 <br /> -Source area delineation control well <br /> ' MW-7A 20 4 1 -Source area delineation control well <br /> MW-8A 20 4 1 -LNAPL observed during the first quarter of 2010 <br /> -Lateral delineation control well <br /> ' MW-9A -20--4 1 -Lateral control wall <br /> MW-10A_ 25 4 1 -Lateral control well <br /> MW-1013 40 4 1 -Lateral control well <br /> ' MW-11A 25 4 1 -LNAPL observed during the first quarter of 2010 <br /> -Source area delineation control well <br /> MW-11 BR 45 4 1 -Source area delineation control well <br /> ' MW-12A 25 4 1 -Lateral control well <br /> MW-12B 45 4 1 -Lateral control well <br /> MW-13A 25 4 1 -Lateral control well <br /> -COPCs not detected greater than their reporting limits for more <br /> ' MW-13B 45 4 1 than seven years <br /> -TEPH-d affected 9mundwater present for approximately 20 years <br /> MW-14A 25 4 1 -Down radiant delineation control well <br /> MW-14B 45 4 1 -Downgradient delineation control well <br /> MW-15A 20 4 1 -Down radient control well <br /> ' MW-15B 45 4 1 -Down mdient control well <br /> MW-15C(formerly 2C) 90 4 1 -Downgredient control well <br /> ' Page 3 of 6 <br />