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MATRIX ENVIRONMENTAL LABORATORIES <br /> ANALYSIS: Volatile Organic Analytes EPA Method 624 <br /> CLIENT W Geo <br /> CONTACT G Converse Date Sampled 1211192 <br /> COC No 3649 Date Received 1212192 <br /> Project No Date Extracted NIA <br /> Sample ID Convault-Sewer Date of Analysis 12/09/92 <br /> Lab ID 924123 Matrix WATER <br /> File L0905.D <br /> ANALYTES CONCENTRATION REPORTING <br /> ug/L(ppb) LMT(ppb) <br /> tetrachloroethene ND 100 <br /> toluene 300 50 <br /> total xylenes 1,600 150 <br /> trans-l,2-dichloroethene ND 50 <br /> trans-1,3-dichloropropene ND 50 <br /> trichloroethene ND 50 <br /> tnchlorofluoromethane ND 100 <br /> vinyl acetate ND 50 <br /> vinyl chlonde ND 100 <br /> SURROGATE RECOVERY <br /> Surrogate <br /> Amount Spike %Recov <br /> (Ppb) (Ppb) <br /> 1,2-dichloroethane-d-4 462 500 92.4 <br /> toluene-d8 493 500 996 <br /> 4-bromofluorobenzene 489 Soo 977 <br /> Surrogate Recovery Range= 50 - 150 <br /> ND =Not Detected at, or Above the Report Limit <br /> This analysis was performed on a 1 10 dilution and the Report Limits <br /> adjusted accordingly <br /> page 2 <br /> 3017 KILGORE ROAD# 100 0 RANCHO CORDOVA, CA 95742 PHONE (916) 635-3962 • FAX (916) 635 9331 <br />