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885 Jarvis Dr <br /> Sequoia Morgan HiII,CA 95037 <br /> (408)776-9600 <br /> Analytical FAX(408)782-6308 <br /> www sequotalabs ccm <br /> Stratus Environmental Inc Project ARCO#2130 MLL0779 <br /> 13330 Cameron Park Dr,Suite 550 Project Number ARCO#2130,Stockton,CA Reported <br /> Cameron Park CA,95682 Project Manager Jay Johnson 01/10/03 16 20 <br /> ,asollne (2-Methylpentane to 1,2,4-Trimethylbenzene) and BTEX by EPA 8015M and 8021B-Qnality Contro <br /> Sequoia Analytical-Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Lumts RPD Limit Notes <br /> Batch 3010016-EPA 5030B(P/T) <br /> Duplicate(3010016-DUPl) Source 5212643-01 Prepared&Analyzed 01/02/03 <br /> Purgeable Hydrocarbons ND 50 ug/l ND 200 <br /> Benzene ND 050 ND 200 <br /> Toluene ND 050 ND 200 <br /> Ethylbenzene ND 050 ND 200 <br /> Xylenes(total) ND 050 ND 200 <br /> Surrogate a aa-Trii luorotoluene 930 100 93 60-140 <br /> Batch 3010050-EPA 5030B{PIT) <br /> Blank(3010050-BLK1) Prepared&Analyzed 12/30/02 <br /> Purgeable Hydrocarbons ND 50 ugfl <br /> enzene ND 050 " <br /> oluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Surrogate a,a,a-Trifluorotoluene 947 100 95 60-140 <br /> Blank(3010050-BLK2) Prepared&Analyzed 01/01/03 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 <br /> Xylenes(total) ND 050 " <br /> Surrogate a aa-Trifluorotoluene 839 100 84 60-140 <br /> Laboratory Control Sample(3010050-BSI) Prepared&Analyzed 12/31/02 <br /> Benzene 903 050 u8n 100 90 70-130 <br /> Toluene 916 050 100 92 70-130 <br /> Ethylbenzene 944 050 100 94 70-130 <br /> Xylenes(total) 268 0 50 300 89 70-130 <br /> Surrogate a aa-Trifluorotoluene 994 100 99 60.140 <br /> �equota 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 /> 12 of 17 <br />