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IAL <br /> North State Environmental <br /> Cdemical Waste Disposal Trucking Consulting <br /> C E R T I F I C A T E O F ANAL Y S I S <br /> Job Number 49_0447 Date Sampled 03/25/99 <br /> Client Alton Geoscience Date Analyzed 03/31/99 <br /> Project PO#25-0740-02 / CHP-Tracy Date Reported 04/02/99 <br /> Volatile Organics by GC/MS Method 8260 <br /> Laboratory Number 99-0447-05 99-0447-06 99-0447-07 99-0447-08 <br /> Client ID S3-1{24 5-25 SB-2(24 5-25 SB-3(24 5-25 SB-4(24 5-25 <br /> Matrix SOIL SOIL SOIL SOIL <br /> Analyte ug/Kg ug/Kg ug/Kg ug/Kg <br /> Ethanol ND<2500 ND<2500 ND<2500 ND<2500 <br /> Methyl-t-Butyl Ether 7 4 16 93 <br /> Di-isopropyl Ether ND<5 ND<5 ND<5 Np<5 <br /> tertiary Butyl Alcohol ND<5 ND<5 ND<5 N0<5 <br /> Ethyl-t-Butyl Ether ND<5 ND<5 ND<5 ND<5 <br /> t-Amyl Methyl Ether ND<5 ND<5 ND<5 ND<5 <br /> SUR-Dibromofluoromethane 91 % Rec 92 % Rec 91 % Rec 91 % Rec <br /> ¢ Toluene-d8 94 % Rec 94 % Rec 96 % Rec 92 % Rec <br /> 4-Bromofluorobenzene 97 % Rec 89 % Rec 93 % Rec 93 % Rec <br /> 0 <br /> Page 1 Of 2 <br /> P 0 Box 5624 South San Francisco, California 94083 • 650-588-2838 FAX 588 - 1950 <br />