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5 Jarvis <br /> Sequoia MQganH ll 95037 <br /> Analytical FAX 08)776-960D 6 <br /> www wquoialabs ccm <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 /> .Tasoline(2-Methylpentane to 1,2,4-Trimethylbenzene) and BTEX by EPA 8415M and 8021B- Quality Contra <br /> Sequoia Analytical-Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Linut Notes <br /> Batch 3010016-EPA 5030B <br /> Blank(3010016-BLK1) Prepared&Analyzed 01/01/03 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzme ND 050 <br /> Xylenes(total) ND 050 " <br /> Surrogate aa a-Tris luorotoluene 868 100 87 60-140 <br /> Blank(3010016-BLK2) Prepared&Analyzed 01/02103 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene ND 050 " <br /> cyzmne <br /> ND 050 ND 050 <br /> Xylenes(total) ND 050 " <br /> I <br /> Surrogate a a a-TrifJuorololuene 894 100 89 60-140 <br /> Laboratory Control Sample(3010016-BS1) Prepared&Analyzed 01/01/03 <br /> Benzene 106 050 ugfl•,•.__ 100 106 70-130 - — <br /> Toluene 106 050 100 106 70-130 <br /> Ethylbenzene 999 050 100 100 70-130 <br /> Xylenes(total) 308 050 300 103 70-130 <br /> Surrogate a a a-Triuorotoluene 119 100 119 60-140 <br /> Laboratory Control Sample(3010016-BS2) Prepared&Analyzed 01/02/03 <br /> Benzene <br /> 994 0 50 ugll 100 99 70-130 <br /> Toluene 10 2 050 10 0 102 70-130 <br /> Ethylbenzene 10 2 050 100 102 70-130 <br /> Xylenes(total) 302 050 300 101 70-130 <br /> Surrogate aaa-Tnf tuorotoluene 108 100 108 60-140 <br /> i <br /> quota 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 /> 11 of 17 <br />