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ISONorth State Environmental <br /> Chemical Waste Disposal Trucking Consulting <br /> CERTIFICATE OF ANALYSIS <br /> Job Number 98_1369 Date Sampled 10/19/98 <br /> Client Compliance & Closure, Inc Date Analyzed 10/30/98 <br /> Project #12118-2 / Quik Stop #121, Manteca, Date Reported 11/03/98 <br /> Volatile Organics by GC/MS Method 8260 <br /> Quality Control/Quality Assurance Summary <br /> Laboratory Number 98-1369 MS/MSD RPD <br /> Client ID Blank Recovery <br /> Matrix WATER WATER <br /> Analyte Results %Recoveries <br /> ug/L <br /> Ethanol DDD<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<1 <br /> 1,1-Di chl oroe thene ND<1 44 7 <br /> Benzene ND<l 118 13 <br /> Trichloroethene ND<l 83 18 <br /> *uene ND<1 115 4 <br /> orobenzene ND<1 113 12 <br /> SUR-Dibromofluoromethane 45% Rec 156/172 10 <br /> SUR-Toluene-d8 04% Rec 105/110 5 <br /> SUR-4-Bromofluorobenzene 93% Rec 93/69 4 <br /> Reviewed and p roved <br /> �j <br /> John A Murphy <br /> Laboratory Director <br /> Page 2 Of 2 <br /> P 0 Box 5624 • South San Francisco, California 94093 650 - 588-2838 FAX 588 - 1950 <br />