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Table 4 <br /> Total Extractable Petroleum Hydrocarbons as Diesel Groundwater Analytical Results , <br /> Union Pacific Railroad Company <br /> Former Maintenance Facility, Tracy, California <br /> 2009/2010 Annual Groundwater Monitoring Report <br /> Cleanup Levels Total Petroleum 100 100 ' <br /> CA092-70 Hydrocarbons <br /> Monitoring Well Sample Date TEPH-d(pg/L) TEPH-d SG' (pg/L) Notes ' <br /> MW-14A 11/18/02 300 x ND<50 <br /> 03/25/03 480 x,J ND<50 <br /> 11/12/03 250 x 200 x ' <br /> 03/24/04 410 x ND<50 <br /> 11/02/04 260 x ND<50 <br /> Dup 11/02/04 260 x ND<50 ' <br /> 03/01/05 320x ND<50 <br /> Dup 03/01/05 280 x ND<50 <br /> 11/08/05 310 x,NJ ND<50 ' <br /> 03/14/06 250 x,NJ ND<50 <br /> 03/21/07 NA ND<49 <br /> 03/19/08 350 <48 tl <br /> 03/17/09 240 <47 tl , <br /> 03/17/10 280 ND<54 tl <br /> MW-14B 11/19/01 53 ND<50 <br /> 03/11/02 ND<50 NA ' <br /> 03/27/03 ND<50 UJ NA b <br /> 03/24/04 ND<50 NA <br /> 03/01/05 ND<50 NA ' <br /> 03/14/06 ND<50 NA <br /> 03/21/07 NA ND<49 <br /> 03/19/08 71 ND<47 0 <br /> 03/17/09 ND<47 ND<47 ' <br /> 03/17/10 ND<50 ND<50 <br /> Dup 03/17/10 ND<54 ND<54 <br /> MW-15A 11/19/02 ND<50 NA ' <br /> 03/26/03 76 x ND<50 <br /> 11/11/03 ND<50 NA <br /> 03/23/04 ND<50 NA ' <br /> 11/02/04 ND<50 NA <br /> 03/01/05 ND<50 NA <br /> Dup 03/01/05 ND<50 NA , <br /> 11/08/05 ND<50 NA <br /> 03/14/06 ND<50 NA <br /> 03/21/07 NA ND<49 ' <br /> 03/19/08 <47 NA <br /> 03/18/09 ND<47 ND<47 <br /> 03/17/10 ND<55 ND<55 ' <br /> 1 <br /> UP Tracy Annual Tables 2010_dC'tl AAV.alsx ARCAD(S Page 6 o19 <br />