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885 Jarvis Dr <br /> a_ _� Sequoia Morgan Hill,CA 95037 <br /> 9600 <br /> Analytical FAX{08)782 63308 <br /> www sequoialabs tarn <br /> . Stratus Environmental Inc Project ARCO#2130 MLL0779 <br /> 3330 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 /> Yasolme (2-Methylpentane to 1,2,4-Trimethylbenzene) and BTEX by EPA 8015M and 8021B -Quality Contra <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Lieut Units Level Result %REC Limits RPD Lunt Notes <br /> Batch 3010016-EPA 5030B P <br /> "licate(3010016-DUPI) _ Source 5212643-01 Prepared&An_alyzed 01/02/03 <br /> Purgeable Hydrocarbons ND 50 ugll 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 a a- " <br /> g TrJluarotoluene 9 30 100 93 60-140 <br /> Batch 3010050-EPA 5030B / <br /> Blank(3010050-BLK1) Prepared&Analyzed 12/30/02 <br /> Purgeable Hydrocarbons ND 50 ugll <br /> Benzene ND 050 " <br /> �Toluene ND 050 <br /> Ethylbenzene ND 050 <br /> Xylenes(total) ND 050 " <br /> Surrogate a a a-Tri luorotoluene 947 100 95 60-140 <br /> Blank(3010050-BLK2) Prepared&Analyzed 01/01/03 <br /> Purgeable Hydrocarbons ND 50 ngll <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Dbylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Surrogate aaa-Tri luorotoluene 839 100 84 60-140 <br /> Laboratory Control Sample(3010050-BSI) Prepared&Analyzed 12/31/02 <br /> Benzene 903 050 ug/l 100 90 70-130 <br /> Toluene 9 16 050 100 92 70-130 <br /> Ethylbenzene 944 050 100 94 70-130 <br /> Xylenes(total) 268 050 300 89 70-130 <br /> Surrogate a a a-Trfluorotoluene 994 100 99 60-140 <br /> Sequoia 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 />