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885 Jarvis Dr <br /> Sequoia Mcrg4n Hill,CA 95037 <br /> (408)776-9600 <br /> Analytical FAX(408)782-6308 <br /> www.sequoialabs.can <br /> tus Environmental Inc. Project: ARCO 95469,Stockton,CA MMA0406 <br /> 30 Cameron Park Dr.,Suite 550 Project Number: ARCO#5469,Stockton,CA Reported: <br /> Cameron Park CA,95682 Project Manager: Jay Johnson 02/11/03 14:07 <br /> Total Purgeable Hydrocarbons (C6-C10) by EPA 8015B modified, BTEX by EPA 8021B - Quality Control <br /> Sequoia Analytical - Morgan Hill <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 3A28003-EPA 5030B [P/TI <br /> Laboratory Control Sample(3A28003-BS2) Prepared&Analyzed:01/28/03 <br /> Gasoline Range Organics(C6-C 10) 259 50 ug/1 250 104 62-134 <br /> Surrogate:a,a,a-Trifluorotoluene 11.4 10.0 114 55-142 <br /> Matrix Spike(3A28003-MSI) Source: MMA0406-09 Prepared&Analyzed: 01/28/03 <br /> Gasoline Range Organics(C6-C 10) 532 50 ug/1 550 ND 96.7 62-134 <br /> Benzene 9.48 0.50 6.80 0.99 125 68-140 <br /> Toluene 40.7 0.50 41.0 ND 99.3 76-127 <br /> Fthylbenzene 10.1 0.50 9.80 ND 103 77-130 <br /> Xylenes(total) 48.2 0.50 47.9 ND 101 78-128 <br /> Surrogate:a,a,a-Trifluorotoluene 11.4 10.0 114 55-142 <br /> `'Matrix Spike Du (3A28003-MSD1) Source:MMA0406-09 Prepared&Analyzed:01/28/03 <br /> Gasoline Range Organics(C6-C10) 510 50 ug/I 550 ND 92.7 62-134 4.22 41 <br /> Benzene 9.75 0.50 6.80 0.99 129 68-140 2.81 30 <br /> Toluene 40.2 0.50 41.0 ND 48.0 76-127 1.24 30 <br /> Ethylbenzene 9.70 0.50 9.80 ND 99.0 77-130 4.04 21 <br /> Xylenes(total) 46.4 0.50 47.9 ND 96.9 78-128 3.81 21 <br /> Surrogate:a,a,a-Trifluorotoluene 11.1 10.0 121 55-142 <br /> Batch 3B01002-EPA 5030B [PIT] <br /> Blank(31101002-BLK1) Prepared&Analyzed:02/01/03 <br /> Gasoline Range Organics(C6-C10) ND 50 ug/1 <br /> Benzene ND 0.50 <br /> Toluene ND 0.50 " <br /> Ethylbenzene ND 0.50 " <br /> Xylenes(total) ND 0.50 " <br /> Surrogate:a,a,a-Trifluorotoluene 11.7 10.0 117 55-142 <br /> Oquoia Analytical -Morgan Hill 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 /> 22 of 34 <br />