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' 819 Sinker Avenue,Suite 8 <br /> Sequoia Sacramento,CA 95834(916)921-%00 <br /> Analytical FAX equoi92 s 100 <br /> corn <br /> www sequotalabs Dorn <br /> SECQR International-Rancho Cordova Project Arco 6020,Manteca,CA <br /> 3017 Ugore Road,Suite 100 Protect Number N/A Reported <br /> Rancho Cordova CA,95670 P-)w Manager Rusty Benkosky 09/25/01 15 07 <br /> Total Purgeable Hydrocarbon,BTEX and MTBE by DHS LLTFT- Quality Control <br /> Sequoia Analytical-Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1090174-EPA 5030B(P/T) <br /> Blank(1090174-BLKI) Prepared&Analyzed 09/17/01 <br /> Purgeable Hydrocarbons ND 50 ugA <br /> Benzene ND 0 50 " <br /> Toluene ND 0 50 " <br /> Ethylbenzene ND 0 50 " <br /> Xylenes(total) ND 0 50 " <br /> Methyl tert-butyl ether ND 2 5 " <br /> Surrogate a a a-TrfTuorotoluene 109 " 100 109 60-140 <br /> LCS(1090174-BSI) Prepared&Analyzed 09/17/01 <br /> Benzene 105 0 50 ug/l 10 0 105 70-130 <br /> Toluene 102 0 50 100 102 70-130 <br /> Ethylbenzene 103 0 50 100 103 70-130 <br /> Xylenes(total) 306 0 50 300 102 70-130 <br /> ethyl tert-butyl ether 106 2 5 " 100 106 70-130 <br /> Surrogate a a a-Trifluorotoluene 11 1 10 0 111 60-140 <br /> Matrix Spike(1090174-MSI) Source 5109145-02 Prepared&Analyzed 09/17/01 <br /> Benzene 191 0 50 UFA t0 0 8 8 103 60-140 <br /> Toluene 276 0 50 10 0 18 960 60-140 <br /> Ethylbenzene 11 4 0 50 10 0 1 1 t03 60-140 <br /> Xylenes(total) 520 0 50 " 30 0 22 too 60-140 <br /> Methyl tert-butyl ether 35 8 2 5 10 0 23 128 60-140 <br /> Surrogate a a a-Trifluorotoluene 112 " 100 112 60-140 <br /> Matrix Spoke Du 1090174-MSD1 Source 5109145-02 Prepared&Analyzed 09/17/01 <br /> Benzene 196 0 50 ug/1 too 88 108 60-140 2 58 25 <br /> Toluene 282 0 50 too 18 102 60-140 2 15 25 <br /> Ethylbenzene 119 0 50 " loo 1 1 108 60-140 429 25 <br /> Xylenes(total) 530 0 50 300 22 105 60-140 303 25 <br /> Methyl tert-butyl ether 373 2 5 100 23 143 60-140 4 10 25 QM-07 <br /> Surrogate a a a-Trtfluorotoluene 114 100 114 60-140 <br />.Sequoia Analytical-Sacramento The results to this report apply to the samples analyzed in accordance with the chain <br /> of custody document This analytical report must be reproduced to its entirety <br /> Page Page 8 of 9 <br />