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885 Jarvis Drive <br /> Sequoia Morgan Hill CA 95037 <br /> (408)776-9600 <br /> a— ) <br /> Analytical FAX(408)782-6308 <br /> www sequolalabs can <br /> I3RS Corporation f 11 Project ARCO#2093,Tracy,CA <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number ARCO#2093,Tracy,CA Reported <br /> Sacramento CA,95833 Project Manager Vern Elarth 09/30/02 08 20 <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 2123003-EPA 5030B JP/TJ <br /> Blank(2123003-BLKI) Prepared&Analyzed 09/23/02 <br /> Gasoline Range Organics(C6-CIO) ND 50 ugfl <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-Tr¢fluorotoluene 105 100 105 70-130 <br /> LCS(2123003-BSI) Prepared&Analyzed 09/23/02 <br /> Benzene 9 27 050 ug/l 100 92 7 70-130 <br /> Toluene 9 52 050 10 0 95 2 70-130 <br /> Ethylbenzene 9 24 0 50 10 0 924 70-130 <br /> Xylenes(total) 27 3 0 50 30 0 91 0 70-130 <br /> Surrogate a a a-Trifluorotoluene 9 73 10 0 973 70-130 <br /> OCS(2I23003-BS2) Prepared&Analyzed 09/23/02 <br /> Gasoline Range Organics(C6-C10) 213 50 ug/l 250 85 2 70-130 <br /> Surrogate a a a-Trifluorotoluene 12 7 11100 127 70-130 <br /> Matrix Spike(2123003-MS1) Source ML10355-01 Prepared&Analyzed 09/23/02 <br /> Gasoline Range Organics(C6-C10) 466 50 ug/l 550 54 749 60-140 <br /> Benzene 8 84 0 50 660 ND 134 60-140 <br /> Toluene 39 0 0 50 397 ND 98 2 60-140 <br /> Ethylbenzene 892 0 50 920 ND 970 60-140 <br /> Xylenes(total) 42 3 0 50 46 1 ND 91 8 60-140 <br /> Surrogate a a a-Trifluorololuene 13 1 100 131 70-130 QM-07 <br /> Matrix Spike Du (2123003-MSDI) Source MLI0355-01 Prepared&Analyzed 09/23/02 <br /> Gasoline Range Organics(C6-C10) 495 50 ug/I 550 54 802 60-140 604 25 <br /> Benzene 9 69 050 660 ND 147 60-140 9 17 25 QM-07 <br /> Toluene 41 7 050 397 ND 105 60-140 6 69 25 <br /> Ethylbenzene 9 65 0 50 920 ND 105 60-140 7 86 25 <br /> Xylenes(total) 46 1 0 50 46 1 ND 100 60-140 8 60 25 <br /> Surrogate a a a-Trifluorotoluene 11 8 100 118 70-130 <br /> Sequoia Analytical-Morgan Hill The results in this report apply to the ramples analyzed in accordance with the chain <br /> of custody document This analytical report must be reproduced in its entirety <br /> 9of13 <br />