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819 Striker Ave Ste 8 <br /> Sequoia Sacratneato,CA 95834 <br /> (916)921-96M <br /> Analytical FAX(916)921-0100 <br /> J <br /> www.uqooialabs.com <br /> i <br /> Gettler-Ryan-Dublin Project: Former Unocal 0187,Stockton,CA S309067 <br /> 6747 Sierra Court,Ste.! Project Number: N/A Reported: <br /> Dublin CA,91568 Project Manager: Deanna L. Harding 09/15/03 16:39 <br /> Gasoline (2-Methylpentane to 1,2,4-Trimethylbenzene) and BTEX by EPA 8015M and 8021B- Quality Contr <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Motes <br /> Batch 3090053-EPA 5030E (PIT) <br /> Laboratory Control Sample(3090053-BSI) Prepared&Analyzed:09/04/03 <br /> Benzene 11.0 0.50 ug(l 10.0 110 70-130 <br /> Toluene 11.2 0.50 " 10.0 112 70-130 <br /> Ethylbenzene 10.9 0.50 10.0 109 70-130 <br /> Xylenes(total) 34.0 0.50 30.0 113 70-130 <br /> Methyl tert-butyl ether 9.57 2.0 10.0 96 70-130 <br /> Surrogate:a,a,a-TriJluorotoluene 11.0 10.0 110 60-140 <br /> Laboratory Control Sample(3090053-BS2) Prepared&Analyzed: 09/05/03 <br /> Benzene 10.2 0.50 ug/l 10.0 102 70-130 <br /> Toluene 10.3 0.50 10.0 103 70-130 <br /> Ethylbenzene 10.1 0.50 10.0 101 70-130 <br /> Xylenes(total) - 31.2 0.50 30.0 104 70-130 . <br /> Methyl tert-butyl ether 9.47 2.0 10.0 95 70-130 <br /> Surrogate:a,a,a-Tris luorotoluene 10.3 10.0 103 60-140 <br /> Matrix Spike(3090053-MSI) Source: 5309067-16 Prepared&Analyzed:09/05/03 <br /> Benzene 9.83 0.50 ug/l 10.0 ND 98 60-140 <br /> Toluene 10.3 0.50 10.0 ND 103 60-140 <br /> Ethylbettzene 9.80 0.50 10.0 ND 98 60-140 <br /> Xylenes(total) 30.7 0.50 30.0 ND 102 60-140 <br /> Methyl tert-butyl ether 12.5 2.0 10.0 ND 125 60-140 <br /> Surrogate:a,a,a-Tris luorotoluene 10.7 10.0 107 60-140 <br /> Matrix Spike Dup(3090053-MSDI) Source: S309067-16 Prepared&Analyzed:09/05/03 <br /> Benzene 9.40 0.50 ugll 10.0 ND 94 60-140 4 25 <br /> Toluene 9.58 0.50 10.0 ND 96 60-140 7 25 <br /> Ethylbenzene 9.39 0.50 10.0 ND 94 60-140 4 25 <br /> Xylenes(total) 29,0 0.50 30.0 ND 97 60-140 6 25 <br /> Methyl cert-butyl ether 7.09 2.0 10.0 ND 71 60-140 55 25 QR-07 <br /> Surrogate:a,a,a-Triuorotoluene 10.0 10.0 100 60-140 <br /> Sequoia Analytical- Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document. Unless otherwise stated,results are reported on a wet weight basis. <br /> This analytical report must be reproduced in its entirety. <br /> Page 25 of 29 <br />