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North State Environmental Laboratory CA ELAP# 1753 <br /> • 90 South Spruce ANenUe Suite V • South San Francisco CA 940$0 • (650) 266-4563 • FAX (650) 266-4560 <br /> C E R T I F I C A T E O F A N A L Y S I S <br /> Job Number 00-1416 Date Sampled 09/27/2000 <br /> Client Western Geo-Engineers Date Analyzed 10/02/2000 <br /> Project ARC Pump & Weld Date Reported 10/10/2000 <br /> 8010 Volatile Organics by GC/MS <br /> Quality Control/Quality Assurance Summary <br /> Laboratory Number 00-1416 ^'S/MSD RPD <br /> Client ID Blank Recovery <br /> Matrax WATER RATER <br /> Analyte Results '-Recoveries <br /> Lg/L <br /> 1,2-D.ichloroethane ND<1 <br /> 1,2-Dibromoethane ND<l <br /> 1,1-Dichloroethene ND<1 68 1 <br /> Benzene ND<1 91 3 <br /> Trichloroethene ND<1 99 3 <br /> Toluene ND<1 96 5 <br /> Chlorobenzene ND<l 109 0 <br /> SUR-Dibromofluoromethane 85% Rec 97/99 2 <br /> R-Toluene-dB 103% Rec 98/103 5 <br /> R-4-Bromofluorcbenzene 99% Rec 100/101 1 <br /> R vi wed <br /> anA roved <br /> John A Murphy <br /> Laboratory Director <br /> i <br /> Page 2 of 2 <br />