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CALIFORNIA LABORATORY SERVICES <br /> 11/03/04 13 37 <br /> ENSR-Sacramento Project Former Unocal 5098,5606 VffVdivi 8tr4e 0PaJ0828 <br />' 10411 Old Placerville Rd,Suite 210 Project Number 06940-293-100 COC# 1,2, 3,4 <br /> Sacramento,CA 95827-2508 Project Manager Ben 1 Hernngburg <br />' Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units level Result %REC Lumts RPD Limit Notes <br /> Batch CN08390-EPA 5030 Water MS <br />' Blank(0'08390-BLKI) Prepared&Analyzed 10/28/04 <br /> 1,3,5-Tnmethylbenzene ND 050 µg/L <br /> Vinyl chloride ND 10 " <br /> Xylenes(total) ND 1 0 " <br />' Surrogate 1,2-Dachloroethane-d4 125 100 125 66-135 <br /> Surrogate Toluene-d8 898 100 898 72-125 <br /> Surrogale 4-Bromofluorobemene 165 100 165 73-125 S-GC <br /> LCS(CN08390-BS1) Prepared&Analyzed 10/28/04 <br /> Benzene 190 0 50 µg/L 200 95 0 60-135 <br />' orobenzene 208 0 50 „ 200 104 60-133 <br /> ichloroethene 209 0 50 200 104 42-150 <br /> 107 o uene 196 0 50 20 0 980 60-137 <br /> Trichloroethene 198 0 50 200 99 0 62-140 <br />' Surrogate 1 2-Dachloroethane-d4 117 " 100 117 66-1.35 <br /> Surrogate Toluene-d8 937 10 0 93 7 72-125 <br /> Surrogate 4-Bromofluorobenzene 115 10 0 115 73-125 <br /> LCS Dup(CN08390-BSD1) Prepared&Analyzed 10/28/04 <br /> Benzene 199 050 µg1L 200 995 60-135 463 25 <br /> Chlorobenzene 213 0 50 200 106 60-133 238 25 <br />' 1,1-Dachloroethene 210 0 50 " 200 105 42-150 0 477 25 <br /> Toluene 202 0 50 200 101 60-137 3 02 25 <br /> Trichloroethene 208 0 50 200 104 62-140 493 25 <br />' Surrogate 1 2-Dachloroethane-d4 107 II 100 107 66-135 <br /> Surrogate Toluene-d8 8 64 100 864 72-125 <br /> Surrogate 4-Bromofluorobenzene 145 100 145 73-125 S-GC <br /> CA DOHS ELAP Accreditation/Registration Number 1233 <br />' 3249 Fitzgerald Road Rancho Cordova, CA 95742 www.californlalab com 916-638-7301 Fax 916-638-4510 <br />