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CALIFORNIA LABORATORY SERVICES <br /> 07/19/04 10 31 ' <br /> ENSR-Sacramento Project Former Unocal 2859, 1665 CLcS W rvke drternCNG0305 <br /> 10411 Old Placerville Rd, Suite 210 Project Number 06940-357-100 COC# 1, 2,3 e <br /> Sacramento,CA 95827-2508 Project Manager Ben I Heningburg <br /> GasBTEX by GC PID/FID - Quality Control , <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes ' <br /> Batch CN05504- EPA 5030 Water GC <br /> Blank(CN05504-BLKI) Prepared&Analyzed 07/13/04 ' <br /> Gasoline ND 50 µg/L <br /> Benzene ND 050 " <br /> Toluene ND 050 <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 10 " <br /> Surrogate o-Chlorotoluene(BTEX) 208 200 104 65-135 ' <br /> Surrogate o-Chlorotoluene(Gas) 199 200 995 65-135 <br /> LCS(CN05504-BS1) Prepared&Analyzed 07/13/04 <br /> Gasoline 527 50 µg/L 500 105 65-135 <br /> Surrogate o-Ch/orotoluene(Gas) 207 200 104 65-135 <br /> LCS Dup(CN05504-BSD1) Prepared&Analyzed 07/13/04 <br /> Gasoline 524 50 pg/L 500 105 65-135 0 571 30 <br /> Surrogate o-Chlorotoluene(Gas) 203 200 102 65-135 <br /> Matrix Spike(CN05504-MSI) Source CNG0313-01 Prepared&Analyzed 07/13/04 <br /> Gasoline— — 508— 50—µg11. 500 ND 102-65-135 - --- - <br />_� Surrogate o-Chlorotoluene(Gas)__ __ _ 204 — _ � 200 _ _ 102 65-135 <br /> Matrix Spike Dup(CN05504-MSD1) Source CNG0313-01 Prepared&Analyzed 07/13/04 ' <br /> Gasoline 491 50 µg/L 500 ND 982 65-135 340 30 <br /> Surrogate o-Chloroioluene(Gas) 208 200 104 65-135 <br /> 1 <br /> 1 <br /> 1 <br /> 0 <br /> 1 <br /> CA DOHS ELAP Accreditation/Regtstratton Number 1233 <br /> 3249 Rtzgerald Road Rancho Cordova,CA 95742 www callfornialab com 916-638-7301 Fax 916-638-4510 <br />