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x Super%or Precision Analytical, Inc. <br /> 1555 Bur',e. Unit I • San FrarlcSco, Cahrornta 44124 • 1415I 647.1081 /fax(415(821.7123 <br /> C E R T I F I C A T E O F A N A L Y S I S <br /> LABORATORY NO. : 12518-7 DATE SAMPLED: 10/31/91 <br /> CLIENT: Alton Geoscience DATE RECEIVED: 11/01/91 <br /> JOB NO. : 310.308 DATE ANALYZED: 11/07/91 <br /> EPA SW-846 METHOD 8010 <br /> HALOGENATED VOLATILE ORG:;NICS <br /> SAMPLE: MW-1 <br /> Compound MDL (ug/L) RESULTS-(ug/1) <br /> - <br /> Chloromethane/Vinyl Chloride 1.0 ND <br /> Bromomethane/Chloroethane 1.0 ND <br /> Trichlorofluoromethane 0.5 ND <br /> 1,1-Dichloroethene 0.5 I: ND <br /> Methylene Chloride 0.5 ND <br /> trans-1,2-Dichloroethene 0.5 ND <br /> 1,1-Dichloroethane 0.5 ND <br /> Chlorofoi., 0.5 ND <br /> 1,1,1-Trichloroethane 0.5 ND <br /> Carbon tetrachloride 0.5 ND <br /> 1,2-Dichloroothane 0.5 0.8 <br /> Trichloroethylene 0.5 ND <br /> 1,2-Dichloropropane 0.5 ND <br /> - Bromodichloromethane 0.5 ND <br /> Cis-1,3-Dichloropropene 0.5 ND <br /> trans-1,3-Dichloropropene 0.5 ND <br /> 1,1,2-Trichloroethane 0.5 ND <br /> Tetrachloroethene 0,5 ND <br /> Dibromochloromethane 0.5 ND <br /> Chlorabenzene 0.5 ND <br /> Bromoform 0.5 ND <br /> 1,1,2,2-Tetrachloroethane 0.5 ND <br /> 1,3-Dichlorobenzene 0.5 ND <br /> 1,2-Dichlorobenzene 0.5 ND <br /> 1,4-Dichlorobenzene 0.5 ND <br /> Cis-1,2-Dichloroethene 0.5 ND <br /> 2-Chloroethyl vinyl ether 0.5 ND <br /> MDL = Method Detection Limit <br /> ug/1 = parts per billion (ppb) <br /> QA/QC Summary: Daily Standard RPD = <15 <br /> MS/MSD average recovery 82 :MS/MSD RPD Richard Srna, Ph.D. <br /> Al <br /> EaborOtory Dir—fie for <br /> Certified Laboratories <br />