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819 Striker Ave Ste 8 <br /> Sequoia <br /> Sac,rimento,CA 95834 <br /> q u tai a (916)921-9600 <br /> � FAX(916)921-0I00 <br /> www sequotalabs corn <br /> or-Ryan Petaluma Project TOSIA 11192,Stockton CA 5212235 <br /> ON McDoWL11 Blvd Ste B2 Project Number NIA Reported <br /> Petaluma CA,94954 Project Manager Jed Douglas 021D5/03 11 S2 <br /> m <br /> Gasoline (2-Methylpentane to 14,2,4-Trunethylbenzene) and BTEX by EPA 8015M and 8021B - Quality Contr <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %RYC RPD <br /> Analyte Result Linut Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2120262 -EPA 5030B (Prf) <br /> Blank(2120262-BLK5) Prepared&Analyzed 12/19/02 <br /> Metbyl tert-butyl ether ND 20 ug/1 <br /> Surrogate a a a-Tr+Jluorotoluene 931 100 93 60 140 <br /> Blank(2120262-BLK6) Prepared&Analyzed 12/18/02 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene <br /> ND 050 " <br /> Toluene <br /> ND 050 " <br /> Ethylbenzene <br /> ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl tett-butyl ether <br /> ND 2 0 " <br /> Sate a a a-Trrfluarotoluene <br /> 941 100 94 60140 <br /> Laboratory Control Sample 2120262-BSl) Prepared&Analyzed 12/16/02 <br /> 103 0 50 ugll 100 103 70 110 <br /> Benzene <br /> 70 130 <br /> Toluene 106 050 10 0 106 <br /> Ethylbenzene <br /> 10 5 050 l0 0 105 70-130 <br /> Xylenes(total) 292 0 50 300 97 70-130 <br /> Methyl tett-butyl ether <br /> 114 2 5 10 0 114 70-130 <br /> Surrogate a a a-Trifluorotoluene <br /> 115 100 115 60-140 <br /> Laboratory Control Sample(2]20262-BS2) Prepared&Analyzed 12/17/02 <br /> Benzene <br /> 9 86 050 ug/1 100 99 70-130 <br /> Toluene 101 0 50 10 0 101 70-130 <br /> Ethylbenzene <br /> 101 0 50 10 0 101 70-130 <br /> Xylenes(total) 283 0 50 300 94 70-130 <br /> Methyl tett-butyl other <br /> 107 25 10 0 107 70 130 <br /> Surrogate a a a-Trifluorotofuene <br /> 11 1 100 111 60 140 <br /> or <br /> la Analytical-Sacramento The results in thw report apply to the samples analyzed in accordance with the chain of <br /> custody document Unless othermse slated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its a ntrrett <br /> Page 9 of 14 <br />