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ail r_ <br /> 404 N Wiget lane <br /> Sequoia Walnut Creek CA 94598 <br /> (925)98&9600 <br /> Analytical wFAX(925)98&9673 <br /> ww sequolalabs com <br /> Gettler Ryan,Inc -Dublin Project Tosco <br /> 6747 Sierra Court Suite J Project Number Tosco#6981 Reported <br /> Dublin CA,94568 — -Project Manager =Scott Polston` - - - -- 18-Jul-01 08 02 <br /> Total Purgeable Hydrocarbons (C&C12), BTEX and MTBE by DHS LUFT - Quality Control <br /> Sequoia Analytical - Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> [Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1G02003-EPA 5030B P/T <br /> Blank(1G02003-BLKI) Prepared&Analyzed 02-Jul-01 <br /> Purgeable Hydrocarbons ND 10 mg/ml Air <br /> Benzene ND 010 " <br /> Toluene ND 010 " <br /> Ethylbenzene ND 010 " <br /> Xylenes(total) ND 010 " <br /> Methyl tert-butyl ether ND 050 " <br /> Surrogate a a a-Triuorololuene 524 600 873 70-130 <br /> Blank(1G02003-BLK2) Prepared&Analyzed 03-Jul-01 <br /> Purgeable Hydrocarbons ND 10 mg/ml Air <br /> Benzene ND 010 " <br /> Toluene ND 010 • <br /> Ethylbenzenc ND 010 " <br /> Xylenes(total) ND 010 " <br /> Methyl tert-butyl ether ND 050 " <br /> Surrogate a a a-Trtuorololuene 526 600 877 70-130 <br /> Blank(lG02003-BLK3) Prepared&Analyzed 05-Jul-01 <br /> Purgeable Hydrocarbons ND 10 mg/ml Air <br /> Benzene ND 010 " <br /> Toluene ND 010 " <br /> Ethylbenzene ND 0 10 " <br /> Xylenes(total) ND 010 " <br /> Methyl tert-butyl ether ND 050 " <br /> Surrogate a,a a-Trrfluorotoluene 520 600 86 7 70-130 <br /> Blank(1G02003-BLK4) Prepared&Analyzed 06-Jul-01 <br /> Purgeable Hydrocarbons ND 10 mg/ml Air <br /> Benzene ND 010 " <br /> Toluene ND 010 " <br /> Ethylbenzene ND 010 " <br /> Xylenes(total) ND 010 " <br /> Methyl tert-butyl ether ND 050 " <br /> Surrogate a a a-Triuorotoluene 532 " 600 887 70-130 <br /> Sequoia Analytical-Walnut Creck The results in this report apply to the samples analyzed in accordance with the c� <br /> custody document Ais analytical report must be reproduced in its e <br /> Page 4 of 6 <br />