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CALIFORNIA LABORATORY SERVICES , <br /> 09/22/04 16 32 ' <br /> ENSR-Sacramento Project Former Unocal 2859, 1665 ftofVorvk 6rY # R10479 <br /> 10411 Old Placerville Rd,Suite 210 Project Number 06940-357-100 <br /> Sacramento,CA 95827-2508 Project Manager Ben I Heningburg COC# None <br /> GasBTEX by GC PIDTID - Quality Control <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Lunt Notes <br /> Batch CN07290- EPA 5030 Water GC <br /> Blank(CN07290-BLKl) Prepared&Analyzed 09/17/04 ' <br /> Gasoline ND 50 pg/L <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 ' <br /> Xylenes(total) ND 10 " <br /> Surrogate o-Chlorotoluene(Gas) 201 200 100 65-135 <br /> LCS(CN07290-BSI) Prepared&Analyzed 09/17/04 ' <br /> Gasoline 484 50 gg/L 500 968 65-135 <br /> Surrogate o-Chlorotoluene(Gas) 213 200 106 65-135 <br /> LCS Dup(CN07290-BSDI) Prepared&Analyzed 09/17/04 <br /> Gasoline 474 50 pg/L 500 948 65-135 209 30 <br /> Surrogate o-Chlorotoluene(Gas) 214 " 200 107 65-135 <br /> Matrix Spike(CN07290=MSI) Source CNI0505-07 Prepared-&--Analyzed 09/17/04 <br /> Gasoline 469 50 pg/L 500 ND 938 65-135 <br /> Surragate a-chiorotoluene(Gas) 24 8 200 124 65-135 <br /> --Matrix Spike Dup(CN07290-MSD1) "-_ Source CN10505-07 Prepared&Analyzed-09/17/04- <br /> Gasoline <br /> nalyzed-09117104 Gasoline 465 50 pg/L 500 ND 93 0 65-135 0 857 30 <br /> Surrogate o-Chlorotoluene(Gas) 20 7 200 104 65-135 <br /> Batch CN07309- EPA 5030 Water GC <br /> Blank(CN07309-BLKI) Prepared&Analyzed 09/20/04 ' <br /> Gasoline ND 50 pg/L <br /> Benzene ND 050 " <br /> Toluene ND 050 ' <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 1 0 " <br /> Surrogate o-Chlorotoluene(BTEX) 207 200 104 65-135 <br /> CA DOHS ELAP Acereditation/Registration Number 1233 <br /> 3249 Fitzgerald Road Rancho Cordova, CA 95742 www californialab.com 916-638-7301 Fax 916-638-4510 <br />