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Table 3 <br /> Recent Groundwater Monitorings Results <br /> NuStar Terminals Stockton Facility <br /> Stockton , California <br /> Well BTEX and Other Fuel Oxygenates <br /> Completion Sample Location Sample TPHg TPHd <br /> Zone Date Benzene Toluene Eth ( benzene Total DIPE ETBE MTBE TAME TBA Ethanol Methanol <br /> Concentrations in mg/L ( ppm ) <br /> D OW-7D 11 /7/2011 - - -- -- - -- -- -- -- -- - <br /> OW-7D 2/6/2012 - - - - - -- -- -- -- -- -- -- - <br /> OW-7D 5/7/2012 -- -- -- - - - -- - -- -- -- - - <br /> 0W-7D 818/2012 <0 . 05 < 0 . 05 < 0 . 0005 < 0 . 0005 < 000005 <0 . 0005 -- -- -- -- -- - -- <br /> OW-6D 11 /7/2011 -- -- -- -- -- - -- - -- -- -- -- -- <br /> OW-6D 2/6/2012 -- -- -- -- -- -- -- - - -- -- -- -- <br /> OW-6D 5/7/2012 -- -- -- -- -- -- -- - -- -- -- - -- <br /> <0 . 0005 <0 . 0005 <0 . 0005 <0 . 0005 -- -- -- <br /> OW-6D 816/2012 <0 . 05 0 . 094 / < 0 . 05 -- -- -- -- <br /> ACA-3D 11 /9/2011 < 0 . 05 0 . 097 / <0 . 05 ' <0 . 0005 <0 . 0005 <0 . 0005 <0 . 0005 <0 . 0005 <0 . 0005 <000005 <0 . 0005 <0 . 005 < 0 . 005 < 0 . 05 <br /> ACA-3D 2/812012 <0 . 05 0 . 08 / < 0 . 0518 < 0 . 0005 < 0 . 0005 < 0 . 0005 <040005 <0 . 0005 <0 . 0005 <000005 <0 . 0005 <0 . 005 < 0 . 005 < 0 . 05 <br /> ACA-3D 5/8/2012 <0 . 05 0 . 072 / <0 . 051 <0 . 0005 < 0 . 0005 < 0 . 0005 < 060005 <060005 <0 . 0005 <000005 <0 . 0005 <0 . 005 < 0 . 005 <0 . 05 <br /> ACA-3D 818/2012 <0 . 05 0 . 1 / 0 . 063 18 <0 . 0005 <0 . 0005 < 000005 < 060005 -- <000005 - 0 . 013 -- - <br /> ACA-5D 11 /7/2011 <0 . 05 0 , 079 / < 0 . 05 ' 0 . 0016 <0 . 0005 <000005 < 0 . 0005 <0 . 0005 <0 . 0005 <0 . 0005 <050005 0 . 0092 <0 . 005 <0 . 05 <br /> ACA 5D 2/8/2012 < 0 . 05 0 . 14 / < 0 . 05 0 . 0091 <0 . 0005 <0 . 0005 <0 . 0005 <0 . 0005 <0 . 0005 <0 . 0005 <0 . 0005 0 . 015 <0 . 005 <0 . 05 <br /> ACA-5D 5/7/2012 <0 . 05 0 . 072 / <0 . 051 0 . 012 <0 . 0005 <0 . 0005 <0 . 0005 <0 . 0005 <0 . 0005 < 0 . 0005 <000005 0 . 015 <0 . 005 <0 . 05 <br /> ACA-5D 8/7/2012 <0 . 05 0 . 07 / 0 . 0615 <060005 <0 . 0005 <090005 <0 . 0005 -- - <060005 -- <0 . 005 -- - <br /> 1 . BTEX (benzene , toluene , ethylbenzene , and total xylenes) and other fuel oxygenates by EPA Method 8260B . 10 . MRL = Method reporting limit. <br /> 3 . TPHd = Total petroleum hydrocarbons quantified as diesel by EPA Method 8015M (GC/MS Combination ) . 12 . -- = Not sampled or not analyzed . <br /> 4 . DIPE = Di-isopropyl ether. 13 . DUP = Duplicate sample . <br /> 5 . ETBE = Ethyl tertiary-butyl ether (tert- butyl ethyl ether) . 14 . ACA- 1 B and ACA-213 are screened in Zone C . <br /> 6 . MTBE = Methyl tertiary-butyl ether. 15 . M = RPD for primary and duplicate samples are outside of quality control limits . <br /> 8 . TBA = Tertiary- butyl alcohol . 17 . MRL increased due to matrix interference . <br /> 9 . mg/L (ppm ) = Milligrams per liter ( parts per million) . 18 . Second value is the TPHd analytical results after the sample extract was treated <br /> with silica-gel . <br /> 2 . TPHg = Total petroleum hydrocarbons quantified as gasoline by EPA Method 8260B . 11 . < = Not detected above the MRL . <br /> 3 . TPHd = Total petroleum hydrocarbons quantified as diesel by EPA Method 8015M ( GC/MS Combination ) . 12 . -- = Not sampled or not analyzed . <br /> 4 . DIPE = Di - isopropyl ether. 13 . DUP = Duplicate sample . <br /> 5 . ETBE = Ethyl tertiary-butyl ether (tert-butyl ethyl ether) . 14 . ACA- 1 B and ACA-2B are screened in Zone C . <br /> 6 . MTBE = Methyl tertiary-butyl ether. 15 . M = RPD for primary and duplicate samples are outside of quality control limits . <br /> 7 . TAME = Tertiary-amyl methyl ether. 16 . MRL increased due to interference from gasoline-range hydrocarbons . <br /> 8 . TBA = Tertiary-butyl alcohol . 17 . MRL increased due to matrix interference . <br /> 9 . mg/L ( ppm) = Milligrams per liter (parts per million ) . <br /> Revised Cleanup Plan <br /> Stockton Facility <br /> 1014- 12 <br /> Page 6 of 6 <br />