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1 <br /> CALIFORNIA LABORATORY SERVICES <br /> 08/04/04 16 28 <br /> ENSR-Sacramento Project Former Unocal 2859, 1665 f f{ffV0 VOrgert nCNG0240 <br />' 10411 Old Placerville Rd, Suite 210 Project Number 06940-357-100 COC# 1,2,3 <br /> Sacramento,CA 95827-2508 Project Manager Ben l Heningburg <br /> GasBTEX by GC PID/FID - Quality Control <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Lunt Emits Level Result %REC Lunits RPD Limit Notes <br /> etch CN05458-EPA 5030 Water GC <br /> lank(CN05458-BLK1) Prepared 07/12/04 Analyzed 07/13/04 <br /> enzene ND 0 50 µg/L <br /> aluene ND 0 50 " <br /> Ethylbenzene ND 0 50 " <br /> tylenes(total) ND 10 " <br /> Surrogate o-Chlorololuene(Gas) 201 200 100 65-135 <br /> kCS(CN05458-BS1) Prepared 07/12/04 Analyzed 07/13/04 <br /> Gasoline 513 50 gg/L 500 103 65-135 <br /> rogale o-Chlorololuene(Gas) 209 200 104 65-135 <br /> US Dup(CN05458-BSD1) Prepared 07/12/04 Analyzed 07/13/04 <br /> asoline 515 50 pg/L 500 103 65-135 0 389 30 <br /> rtrrogale o-Chlorotoluene(Gas) 208 200 104 65-135 <br />,.Matrix Spike(CN05458-MST) Source CNG0241-02 Prepared 07/12/04 Analyzed 07/13/04 <br /> Irasoline 468 50 gg/L 500 ND 93 6 65-135 <br /> Surrogate o-Chlorololuene(Gas) 205 " 200 101 65-135 <br /> tatrix Spike DuP(CN05458-MSD1) Source CNG0241-02 Prepared 07/12/04 Analyzed 07/13/04 <br /> Gasoline 475 50 pg/L 500 ND 950 65-135 148 30 <br /> urrogale o-Chlorotoluene(Gas) 202 200 101 65-135 <br /> CA DOHS ELAP Accreditation/Registration Number 1233 <br /> 1249 Fitzgerald Road Rancho Cordova, CA 95742 www caiifornialab.com 916-638-7301 Fax. 916-638-4510 <br />