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Table 1 <br /> Summary of Analytical Results <br /> Union Pacific Railroad Company <br /> Former Maintenance Facility, Tracy, California <br /> Biotreatment Bed Sampling Report <br /> Sample TPH-d" TPH-d w/SG" TPH• " " <br /> Well ID Depth Date Sampled mo TPH•mo wl SG Groundwater" <br /> (feet bgs) (mglkg) (mglkg) (mg/kg) (mg/kg) <br /> Cleanup Levels <br /> (CAG 92-707) 50 50 -- -- 100 <br /> HA-1 1 3/15/2010 98 45 150 83 <br /> 3 3/15/2010 98 64 500 340 <br /> HA-2 1 3/15/2010 91 73 150 120 <br /> 3 3/15/2010 1.2 1.2 <50 <50 <br /> HA-3 1 3/15/2010 67 48 110 90 TEPH ND <br /> 3 3115/2010 74 35 140 93 (March 2010)at: <br /> -MW-01A <br /> HA-4 1 3/15/2010 190 110 320 180 -MW-04A <br /> 3 3/15/2010 <50 <50 <50 <50 -MW-05A <br /> -MW-26A <br /> HA-5 1 3/17/2010 550 450 790 590 <br /> 3 3/17/2010 42 26 78 <50 <br /> HA-6 1 3/17/2010 620 410 970 760 <br /> 3 3/17/2010 4.4 3.3 <50 <50 <br /> Notes: <br /> 1.Samples analyzed for TPH-d with and without silica gel cleanup and DI WET TPH-d with and without silica gel <br /> cleanup by USEPA method 80158. <br /> bold Bolded results are above the corresponding cleanup level. <br /> H sample was prepared or analyzed beyond the specified holding time <br /> TPH-d total petroleum hydrocarbons as diesel <br /> TPH-mo total petroleum hydrocarbons as motor oil <br /> TEPH total extractable petroleum hydrocarbons <br /> w/SG with silica gel cleanup <br /> pg/L micrograms per liter <br /> CAO Cleanup and Abatement Order <br /> mg/Kg milligrams per kilogram <br /> ' The listed wells are screened at locations below the biotreatment beds or are located immediately downgradient <br /> < Less than the reporting limit indicated <br /> Biotreatment bed results(march2010)v2xls ARCADIS <br /> Page 1 of 1 <br />