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North State Environmental <br /> Chemical Haste Disposal Trucking Consulting <br /> CERTIFICATE OF ANALYSIS <br /> Job Number 99-0306 Date Sampled 03/03/99 <br /> Client Western Geo-Engineers Date Analyzed 03/10/99 <br /> Project 1211 S French Camp Turnpike Rd Date Reported 03/16/99 <br /> Volatile Organics by GC/MS Method 8260 <br /> Quality Control/Quality Assurance Summary <br /> Laboratory Number 99-0306 MS/MSD RPD <br /> Client ID Blank Recovery <br /> Matrix WATER WATER <br /> Analyte Results %Recoveries <br /> ug/L <br /> Ethanol ND<500 <br /> Methyl-t-Butyl Ether ND<1 <br /> Da-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 /> "ichloroethene <br /> 1-Dichloroethene ND<1 57 2 <br /> nzene ND<1 95 1 <br /> ND<1 128 1 <br /> Toluene ND<1 127 1 <br /> Chlorobenzene ND<1 114 1 <br /> SUR-Dibromofluoromethane 103% Rec 96/101 3 <br /> SUR-Toluene-d8 95% Rec 95/96 1 <br /> SUR-4-Bromofluorobenzene 103% Rec 97/100 3 <br /> Riewed and Approved <br /> John A Murphy <br /> Laboratory Director <br /> 0 <br /> Page 2 Of 2 <br /> P 0 Box 5624 South San Francisco California 94083 650 - 588 - 2838 FAX 588 - 1950 <br />