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819 Striker Ave Ste 8 <br /> DSequoia Sacramento,CA 95$34 <br /> qw Analytical FAX(916)921-9600 <br /> (91 b)921-0100 <br /> Gettler-Ryan-Dublin Project Former Unocal 0187,Stockton,CA S211332 <br /> 6747 Sierra Court,Ste J Project Number NIA Reported. <br /> Dublin CA,94568 Project Manager Deanna L Harding 12/27/02 17 49 <br /> Gasoline\BTEXIOxygenates by EPA method 8260B- Quality Control <br /> Sequoia Analytical -Sacramento <br /> Reporting Spike Source %REC RPD <br /> IAnalyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2110282-EPA 5030B IP/TJ r= <br /> Laboratory Control Sample(2110282-BSI) Prepared&Analyzed 11/19/02 _ <br /> Benzene 105 050 ugll 134 78 70-130 <br /> Toluene 670 050 81 0 83 70-130 <br /> Methyl Cert-butyl ether 148 050 21 8 68 60-140 <br /> Gasoline(C6-C10) 860 50 1100 78 70-130 <br /> Surrogate 1,2-DCA-d4 11 7 15 0 91 60-140 <br /> Surrogate Toluene-d8 223 250 89 60-140 <br /> Surrogate 4-BFB 208 23 0 83 60-140 <br /> Laboratory Control Sample(2110282=BS2) Prepared&Analyzed 11/20/02 <br /> Benzene - 109 050 11911 134 81 70-130 <br /> Toluene- 65 3 050 81 0- ' T --,81 _- 70-130- <br /> Methyl tert-butyl ether 15 2 050 21 8 70 60-140 <br /> Gasoline(C6-C10) 1130 50 1100 103 70-130 <br /> Surrogate 1 2-DCA-d4 220 250 88 60-140 <br /> Surrogate-Toluene-d8 215 250 86 60-140 <br /> Sur rogale 4-BFB 21 2 250 85 60-140 <br />---- ------ --- -- — --------- - - ----- — ---- <br /> Matrix Spike(2110282-MSI) Source S211249-01 Prepared&Analyzed 11/19/02 <br /> Benzene _. 125 0 50- -ugA- -- 13 4--- 0 52 _f97-- <br /> Toluene <br /> 9 Toluene 709 050 81 0 ND 88 70-130 <br /> Methyl tert-butyl ether 21 8 0 50 21 8 4 6 79 60-140 <br /> Gasoline(C6-C10) 960 50 1 100 ND 86 60-140 <br /> Surrogate 1,1-DCA-d4 23 6 25 0 94 60-140 <br /> Surrogate Toluene-d8 251 25 0 100 60-140 <br /> Sun ogate 4-BFB 21 4 250 86 60-140 <br /> Matrix Spike Dup(2110282-MSDI) Source- 5211249-01 Prepared&Analyzed 11/19/02 _ <br /> Benzene 126 0 50 ug/I 13 4 052 90 70-130 08 25 <br /> Toluene 73 3 050 81 0 ND 90 70-130 3 25 <br /> Methyl tert-butyl ether 23 5 0 50 21 8 4 6 87 60-140 8 25 <br /> Gasoline(C6-CIO) 883 50 1100 ND 79 60-I40 8 25 <br /> Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the cha <br /> of custody document Unless otherwise stated, results are reported on a wet weight <br /> basis This analytical report must be reproduced in its entirety <br /> 34 of 41 <br />