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r <br /> 404 N Wiget lane <br /> Sequoia Walnut Creek,CA 94598 <br /> (925)988-9600 <br /> q%p Analytical www <br /> FAX(925) 73 <br /> sequolalabs labs corn <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 05-Sep-01 18 11 <br /> Total Purgeable Hydrocarbons (C6-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 1H21003-EPA 5030B PIT <br /> Blank(1H21003-BLKI) Prepared&Analyzed 21-Aug-01 <br /> Purgeable Hydrocarbons(C6-C12) 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(MTBE) ND 050 " <br /> Surrogate a a a-Triuorotoluene 528 600 880 70-130 <br /> Blank(1H21003-BLK2) Prepared&Analyzed 23-Aug-Ol <br /> Purgeable Hydrocarbons(C6-C12) ND 10 mg/m'Air <br /> Benzene ND 010 " <br /> Toluene ND 010 " <br /> Ethylbenzene ND 010 . <br /> Xylenes(total) ND 0 10 " <br /> Methyl tert-butyl ether(MTBE) ND 0 50 " <br /> Surrogate a a a-Triuoroioluene 570 600 950 70-130 <br /> Blank(1H21003-BLK3) Prepared&Analyzed 24-Aug-01 <br /> Purgeable Hydrocarbons(C6-C12) 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(MTBE) ND 050 " <br /> Surrogate a a a-Trifluorotoluene 544 600 907 70-130 <br /> LCS(IH21003-BSI) Prepared&Analyzed 21-Aug-01 <br /> Benzene 164 0 10 mg/ml Air 200 82 0 70-130 <br /> Toluene 1 75 010 200 87 5 70-130 <br /> Ethylbenzene 175 0 10 200 $75 70-130 <br /> Xylenes(total) 536 0 10 6 00 89 3 70-130 <br /> Surrogate a a a-Tris luorololuene rn 576 6 00 960 70-130 <br /> Sequala Analytical- Walnut Creek The results m 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 8 of 12 <br />