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z <br /> North State Environmental <br /> 4,6 Chemical Waste Disposal • Trucking • Consulting <br /> 4PCERTIFICATE O F ANALYSIS <br /> Job Number: 99-0445 Date Sampled : 03/25/99 <br /> Client Alton Geoscience Date Analyzed: 04/01/99 <br /> Project CHP-Stockton / PO# 25-0740-02 Date Reported: 04/07/99 <br /> Volatile Organics by GC/MS Method 8260 <br /> Laboratory Number 99-0445-01 99-0445-02 99-0445-03 99-0445-04 <br /> Client ID B-1 B-2 B-3 B-4 <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 ND<5 8 ND<5 7 <br /> Di-isopropyl Ether ND<5 ND<5 ND<5 ND<5 <br /> tertiary Butyl Alcohol ND<5 ND<5 ND<5 ND<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 100% Rec 99 % Rec 93 % Rec 99 % Rec <br /> SUR-Toluene-d8 99 % Rec 95 % Rec 96 % Rec 92 % Rec <br /> SUR-4-Bromofluorobenzene 89 % Rec 89 % Rec 88 % Rec 89 % Rec <br /> Page 1 Of 2 <br /> P. 0 . Box 5624 South San Francisco, California 94083 • 650-588-2838 FAX 588- 1950 <br />