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404 N Wiget lane r , <br /> Sequoia Walnut Creek CA 94598 <br /> FAX(925)988-9673 <br /> Analyticalwww sequotalabs com <br /> Gettler Ryan,Inc -Dublin Project Tosco <br /> 6747 Sierra Court Suite d Project Number Tosco#6981 Reported <br /> Dublin CA,94568 Project Manager Scott Polston 05-Sep-01 18 11 <br /> Total Purgeable Hydrocarbons (C6-C12) and BTEX in Air by DHS LUFT - Quality Control- <br /> Sequoia Analytical - Walnut Creek <br /> Reporting Spice Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1H21003-EPA 5030B P/T <br /> Blank(1H21003-BLKI) Prepared&Analyzed 21-Aug-0i <br /> Purgeable Hydrocarbons(C6-C12) ND 2 0 mg/m'Air <br /> Benzene ND 0 010 " <br /> Toluene ND 0 010 " <br /> Ethylbenzene ND 0 010 " <br /> Xylenes(total) ND 0 010 " <br /> Surrogate a a a-Triuorotoluene 528 6 00 880 70-130 <br /> Blank(1H21003-BLK2) Prepared&Analyzed 23-Aug-01 <br /> Purgeable Hydrocarbons(C6-C 12) ND 2 0 mg/m'Air <br /> Benzene ND 0 010 " <br /> Toluene ND 0 010 " <br /> Ethylbenzene ND 0 010 " <br /> Xylenes(total) ND 0 010 <br /> Surrogate aaa-Trouorotoluene 5 70 600 95 0 70-130 <br /> Blank(1H21003-BLK3) Prepared&Analyzed 24-Aug-01 <br /> Purgeable Hydrocarbons(C6-C12) ND 2 0 mglm'Air <br /> Benzene ND 0 010 " <br /> Toluene ND 0 010 " <br /> Ethylbenzene ND 0 010 " <br /> Xylenes(total) ND 0 010 " <br /> Surrogate a aa-Triuorotoluene 544 6 00 90 7 70-130 <br /> LCS(1H21003-BS1) Prepared&Analyzed 21-Aug-Ol <br /> Benzene 164 0 010 mglm'Air 200 820 65-120 <br /> Toluene 175 0 010 200 875 65-120 <br /> Ethylbenzene 175 0 010 2 00 875 65-120 <br /> Xylenes(total) 536 0 010 6 00 893 65-120 <br /> Surrogate a a a-Trifluorotoluene 5 76 6 00 960 70-130 <br /> Sequota Analytical- Walnut Creek the results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its en* <br /> Page 10 of 12 <br />