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CALIFORNIA LABORATORY-SERVICES <br /> 09/08/04 12 00 ' <br /> ENSR-Sacramento Project Former Unocal 5098,5606� cf%o e8�o�er# 'CNH0981 <br /> 10411 Old Placerville Rd,Suite 210 Project Number 06940-293-100 COC# 41207 <br /> Sacramento,CA 95827-2508 PrQlect Manager Ben I Hentngburg <br /> Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> Reporting Spike Source %REC RPD <br /> JAnalyte Result Limit Units Level Result %REC Limits RPD Limit Notes ' <br /> Batch CN06839-EPA 5030 Water MS <br /> Blank(CN06839-BLK1) Prepared&Analyzed 09/03/04 ' <br /> 1,3,5-Trimethylbenzene ND 050 µg/L <br /> Vinyl chloride ND 10 " <br /> Xylenes(total) ND 10 " <br /> Surrogate 12-Dtchloroethane-d4 136 100 136 66-135 S-GC <br /> Surrogate Toluene-d8 942 100 942 72-125 <br /> Surrogate 4-Bromofluorobenzene 108 100 108 73-125 <br /> LCS(CN06839-BSI) Prepared&Analyzed 09/03/04 <br /> Benzene 173 050 µg/L 200 865 60-135 <br /> Chlorobenzene 174 050 200 870 60-133 <br /> 1,1-Dichloroethene 236 050 200 118 42-150 <br /> Toluene 183 050 200 915 60-137 <br /> Trichloroethene 179 050 200 895 62-140 <br /> Surrogate 12-Dtchloroethane-d4 11 7 100 117 66-135 <br /> Surrogate Toluene-d8 101 100 101 72-125 <br /> =Surrogate 4-Bromofluorobenzene 98 10 0 98 7-73-125 <br /> LCS Dup(CN06839-BSD1) Prepared&Analyzed 09/03/04 <br /> Benzene 180 050 µg/L 20 0 900 60-135 397 25 <br /> _ Chlorobenzene _ 17_6 0_50_ 20 0 88 0 _60-133 _ 1 14 25 <br /> 1 I-Dichloroethene T T 242 T 050 20 0 121 42-150 251 25 f <br /> Toluene 191 050 20 0 955 60-137 428 25 <br /> Trichloroethene 185 0 50 20 0 925 62-140 330 25 <br /> Surrogate 1,2 Dtchloroethane-d4 116 10 0 116 66-135 <br /> Surrogate Toluene-d8 104 100 104 72-125 ' <br /> Surrogate 4-Bromofluorobenzene 104 10 0 104 73-125 <br /> Al <br /> CA DOHS ELAP Accreditation/Registration Number 1233 I <br /> 3249 Fitzgerald Road Rancho Cordova, CA 95742 www.californialab.com 916-638-7301 Fax- 916-638-4510 <br />