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E <br /> Sequoia 404 N WiLane <br /> Walnut Creek CAA 94598 <br /> FAX(925)988-9673 <br /> Analyticalwww sequoialabs com <br /> 0 <br /> Gettler Ryan Inc -Dublin Project Tosco <br /> 6747 Sierra Court Suite J Project Number Tosco#6981 Reported <br /> Dublin-CA--94568 _ Project Manager ScottPolston _ — _= 13-Aug-01 07 25 <br /> Total Purgeable Hydrocarbons (C6-C12) and BTEX in Air by DHS LUFT - Quality Control <br /> Sequoia Analytical - Walnut Creek <br /> 9 y <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %R-EC Limits RPD Limit Notes <br /> Batch 1G27002- EPA 50308 PIT <br /> Blank(1G27002-BLKI) Prepared&Analvzed 26-Jul-01 <br /> Purgeable Hydrocarbons --ND 2 0 mg/m'Air <br /> Benzene ND 0 010 <br /> Toluene ND 0 010 " <br /> Ethvlbenzene ND 0 010 " <br /> Xylenes(total) ND 0 010 " <br /> Surrogate a a a-Tr fluorotoluene _ 5 12 T 600 8S 3 70-130 <br /> Blank(1G27002-BLK2) Prepared&Analyzed 27-Jul-01 <br /> Purgeable Hydrocarbons ND 2 0 mglm'Air <br /> Benzene ND 0 010 " <br /> Toluene ND 0 010 " <br /> Ethvlbenzene ND 0 010 " <br /> Xylenes(total) ND 0 010 . <br /> Surrogate a a a-Trifluorotoluene ------ - ---'Z — --- - - 600 — -- —129 W 70-130 <br /> Blank(IG27002-BLK3) Prepared&Analyzed 02-Aug-01 <br /> Purgeable Hydrocarbons ------ _- -" ND 2 0 mg/m'Air --- �� <br /> Benzene ND (}Ot0 " <br /> Toluene ND 0 010 ' <br /> Ethvlbenzene ND 0 010 " <br /> Xvlenes(total) ND 0 010 <br /> Surrogate a a a-Trifluorotoluene� �- ---5 02-- ---- - 600 83 - 70-130 <br /> LCS(1G27002-BSI) Prepared&Analyzed 26-Jul-01 <br /> Benzene 1 94 0 010 mg/m'Air 200 97 0 65-120 <br /> Toluene 188 0 010 200 940 63-120 <br /> Ethylbenzene 1 84 0 010 200 920 65-120 <br /> Xylenes(total) 5 18 0 010 600 863 65-120 <br /> Surrogate a a a-f1tJluorotoluene 5-3-6--W 600 _893 70-130 <br /> Sequoia Analvttcat- Walnut Creek The results to this report apply to the samples analy.ed to accordance with theof <br /> custody document This analytical report must be reproduced in its ty <br /> Page 7 of 9 <br />