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S�- 819 Sinker Ave Ste 8 <br /> equoia Sacramento (,A 9 58 34 <br /> (916)921-96DO <br /> nab tical FAX(916)921 utno <br /> WWW sequolalabs nom <br /> CGcttler-Ryan-Petaluma Project Iosco 11192,Stockton,C.A S212235 <br /> 1364 N Mc,Dowell Blvd Ste B2 Project Number N/A Reported <br /> Petaluma CA 94954 Project Manager Jed Douglas 02/05/03 11 52 <br /> Gasoline (2-Methylpentane to 1,2,4-Trimethylbenzene) and BTEX by EPA 8015M and 8021B - Quality Contr <br /> Sequoia Analytical - Sacramento <br /> Reporting Spi ke Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2120262-EPA 5030B(PIT) <br /> Laboratory Control Sample(2120262-BS4) Prepai ed&Analyzed 12/20/02 <br /> Benzene 982 0 50 ug/l 10 U 98 70-130 <br /> Toluene 101 050 10 0 101 70-130 <br /> Ethylbenzene 991 0 50 100 99 70-130 <br /> Xylenes(total) 289 0 50 300 96 70-130 <br /> Methyl tent butyl ether 8 82 2 5 10 0 88 70-130 <br /> Surrogate a a a-Tnfluorotoluene 111 100 111 60-140 <br /> Laboratory Control Sample(2120262-BS5) Prepared&Analyzed 12/19/02 <br /> Benzene 9 80 0 50 ug/l - 100 98 70-I30 <br /> Toluene 9 99 f 0 50 10 0 100 70-130 <br /> Ethylbenzene 989 050 10 0 99 70-130 <br /> Xylenes(total) 290 050 300 97 70-130 <br /> Methyl€ert-butyl ether 971 2 0 " 10 0 97 70-130 . <br /> Surrogate a a a-Tnfluorotoluene 104 100 '104 60-140 <br /> Laboratory Control Sample(2120262-BS6) Prepared_&Analyzed 12/18/02 <br /> Benzene 101 0 50 ug/l 100 - 101 70-130 <br /> Toluene 103 0 50 10 0 103 70-130 <br /> Ethylbentene 10 2 0 50 100 '102 70-130 <br /> Xylenes(total) 303 0 50 30 0 101 70-130 <br /> Methyl tert-butyl ether 10 4 2 0 100 104 70-130 <br /> Surrogate a a a-Tnfluorotoluene 113 100 113 60-140 <br /> Matrix Spike(2120262-MS 1) Source S212231-02 Prepared&Analyzed 12/16/02 <br /> Benzene 101 050 ug/1 100 ND 101 60-140 <br /> Toluene - 10 4 0 50 100 ND 104 60-140 <br /> Ethylbenzene 10 2 0 50 10 0 ND 102 60-140 <br /> Xylenes(total) 297 050 30 0 ND 99 60 140 <br /> Methyl tert-butyl ether 12 0 25 10 0 ND 120 60-140 <br /> Surrogale act a-Trifluorololuene 11 7 100 117 60 140 <br /> Sequoia Analytical -Sacramento The results in this report apply to the samples analyzed in accordance with the Mom of <br /> custody docunieN Unless otherwise slated results are reported on a Vvel weight basis <br /> This anah,trcal rr port nrust be reproduced in its entrrety 0 <br /> Page 10 of 14 <br />