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North State Environmental <br /> Chemical Waste Disposal Trucking _Consulting <br /> CERTIFICATE OF ANALYSIS <br /> Job Number 99-0447 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 /> Quality Control/Quality Assurance Summary <br /> Laboratory Number 99-0447 MS/MSP RPD <br /> Client ID Blank Recovery <br /> Matrix SOIL SOIL <br /> Analyte Results %Recoveries <br /> ug/Kg <br /> Ethanol ND<2500 <br /> Methyl-t-Butyl Ether ND<5 <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<5 <br /> 1,1-Dichloroethene ND<5 141 5 <br /> fu <br /> ene ND<5 114 2 <br /> hloroethene ND<5 142 12 <br /> ene ND<5 149 31 <br /> Chlorobenzene ND<5 112 4 <br /> SUR-DibromofluoromethaneLO <br /> Rec 103/111 8 <br /> SUR-Toluene-de Rec 95/113 18 <br /> SUR-4-BromofluorobenzeneRec 63/86 3 <br /> 4iRee d and r ved <br /> A Murphy <br /> Laboratory Director <br /> 0 <br /> P O Box 5624 South San FrancPis�co , Ca1Qiornta 94083 650 -588-2838 FAX 588 - 1950 <br />