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TABLE 2 <br /> Concentrations of Selected Constituents In Groundwater <br /> Former Disco Site <br /> Stockton,California <br /> Concentration(ug/1-1, <br /> Monitoring Sample <br /> Well/' Date-- TPI 'i 2DCA "EDB BenzeneToluene-- brsxene` X leve. -TBA= 'MTBE DIPE_ :ETRE TAME l.ead- <br /> MW-DIS-i'is 2121102 64 1 180 ND 0.45 ND NO ND ND ND NO NO NO <br /> MW-DIS-11d 2121!02 NO NO NO NO I NO NO ND NO NO NO NO NO <br /> MW-DIS42 2/21102 NO NO NO NO ND NO NO NO ND NO NO NO <br /> MW-DIS-13 2121102 ND NO NO NO ND NO NO ND ND ND NO NO <br /> MW-03S-14s 2121102 ND 52 NO NO -ND NO - NO. ND ND NO NO NO <br /> MW-DIS-a.d 2'21/02 I ND I NO NO I ND I ND I NO I NO ND NQ I ND ND ND <br /> Nates <br /> All analyses performed by EPA Method 8015/0020 <br /> TCLP: EPA Toxicity Characteristic Leachate Procedure for Identifying Hazardous.Waste <br /> MCL: Califomw Maximum Contaminant Level for Drinking Water <br /> <5.0 Below Detection limit of 5.0 ug1L <br /> <0.5 Below Detection limit of 0.5 ug1L <br /> EDB ethylene dibromide <br /> 1,2 DCA 1,2-didoroethane <br /> Sample collected by minimum aeration technique <br /> Samples collected but not analyzed due to lab errodnot confirmed by GC1MS <br /> Samples collected on 6/12197 were analyzed using EPA Method 6240. <br /> BOLD Sold indicates results above the detection limit <br /> NS: Not Sampled <br /> NA: Not Analyzed <br /> 13/19M MW-DIS-2 re-sampled on(his date and analyzed by EPA Method 801516020. Detection not confirmed by GUMS. <br /> MTBE was not detected in the original 2 i 1'99 sample(analyzed by EPA Method 801 518 02 0)and <br /> confirmed by GUMS Method 6260) <br /> U280-MON I2002EO34 Page 18 of is <br /> Copyright 2002,Nleinfelder,Ina <br /> - May 10,2002 <br />