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E <br /> North State Environmental <br /> Chemical Waste Disposal Trucking Consulting <br /> CERTIFICATE OF ANALYSIS <br /> Job Number 9$-342 Date Sampled 03/26/98 <br /> Clrent Western Geo-Engineers Date Analyzed 04/03/98 <br /> Project Date Reported 04/03/98 <br /> Volatile Organics by GC/MS Method 8260 <br /> Quality Control/Quality Assurance Summary <br /> Laboratory Number 98-342 MS/MSD RFD <br /> Client ID Blank Recovery <br /> Matrix WATER WATER <br /> Analyte Results %Recoveries <br /> ug/L <br /> Methanol ND<1000 <br /> Ethanol ND<500 <br /> Methyl-t-Butyl Ether ND<l <br /> Di-ISopropyl Ether ND<5 <br /> tertiary Butyl Alcohol ND<5 <br /> Ethyl-t-Butyl Ether ND<5 <br /> t-Amyl Methyl Ether ND<l <br /> �1,1-Dichloroethene ND<1 68 2 <br /> Benzene ND<1 92 4 <br /> Trichloroethene ND<1 68 4 <br /> Toluene ND<l 90 4 <br /> Chlorobenzene ND<l 98 1 <br /> SUR-D,ibromofluoromethane95 % Rec 97/98 1 <br /> SUR-Toluene-d8 102% Rec 100/101 1 <br /> SUR-4-Bromofluorobenzene 99 % Rec 102/102 0 <br /> Reviewed and Approved <br /> John A Murphy <br /> Laboratory Director <br /> Page 2 Of 2 <br /> P 0 Box 5624 • South San Francisco , California 94083 650-588- 2838 FAX 588 - 1950 <br />