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Table 6 <br /> Historical Analytical Data for Groundwater Well Samples <br /> Former Colombo / Toscana Bakery <br /> 1444 South Lincoln Street <br /> Stockton , California 95206 <br /> Concentration and Associated MCLs (µg/L) <br /> Monitoring Sampling TPH=g Benzene Toluene Ethylbenzene Xylenes MTBE DIPE ETBE TAME TBA 1 ,2-DCA 1 , 2-DBA <br /> Well Date NE ( 1 ) ( 150) (300) (1750) (13) NE NE NE NE (0 . 5) (0 .05) <br /> Travel Blank 1 / 16/2007 <50 <0 . 50 <0 . 50 <0 . 50 <0 . 50 <0 . 50 <0 . 50 <0 . 50 <0 . 50 <5 . 0 <0 . 50 <0 . 50 <br /> Travel Blank 4/ 13/2007 <50 <0 . 50 <0 . 50 <0 . 50 <0 . 50 <0 . 50 <0 . 50 <0 . 50 <0 . 50 <5 . 0 NA NA <br /> Travel Blank 7/23/2007 ' <50 <0 . 50 <0 . 50 <0 . 50 <0 . 50 <0 . 50 <0 . 50 <0 . 50 <0 . 50 <5 . 0 <0 . 50 NA <br /> Travel Blank 10/16/2007' <50 <0 . 50 <0 . 50 <0 . 50 <0 . 50 <0 .50 <0 . 50 <0 . 50 <0 . 50 <5 . 0 <0 . 50 <0 . 50 <br /> Travel Blank 1 /15/2008 <50 <0 .50 <0 . 50 <0 . 50 <0 . 50 <0 . 50 <0 . 50 <0 . 50 <0 . 50 <5 . 0 <0 . 50 <0 . 50 <br /> Travel Blank 4/14/2008 <50 <0 . 50 <0 . 50 <0 . 50 <0 . 50 <0 . 50 <0 . 50 <0 . 50 <0 . 50 <5 . 0 <0 . 50 <0 . 50 <br /> Notes : <br /> BOLD=AII Positives <br /> pg/L = Micrograms-per-liter. <br /> TPH-g = Total petroleum hydrocarbons quantified as gasoline. <br /> MTBE = Methyl tertiary butyl ether. <br /> DIPE = Di-isopropyl ether. <br /> ETBE = Ethyl tertiary butyl ether. <br /> TAME = Tertiary amyl methyl ether. <br /> TBA = Tertiary butyl alcohol . <br /> 112-DCA = 1 , 2-dichloroethane (ethylene dichloride or EDC) . <br /> 1 ,2- DBA = 1 ,2-dibromoethane (ethylene dibromide or EDB) . <br /> DUP = Field duplicate sample. <br /> NE = None established . <br /> I <br /> = Sample labels and chain-of-custody were incorrectly labeled with date of October 4, 2007, <br /> Title 22 CCR MCLs = Title 22 California Code of Regulations Maximum Contaminant Levels (June 2004) . <br /> = Highlighted value exceeds MCL. <br /> S:\Shared\UST\Sara Lee\Project\Stockton (Lincoln Street)\2008 Rennedial_Subsurface Investigation\2008_08 - Report\Investigation Report 6 SCM Tables (Rev).xls Page 4 of 4 <br />