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Sequoia 819 Stoker Avenue Suite a <br /> Sacramento CA 9S834 <br /> 4 a- ) (916)921-9600 <br /> FAX 0 <br /> qIw 0 <br /> Analytical wwsequoialabscom <br /> SECOR International -Rancho Cordova Project ARCO 595, Stockton, CA <br /> 3017 Kilgore Road, Suite 100 Project Number NIA Reported <br /> Rancho Cordova CA, 95670 Project Manager Rusty Benkosky - 08/06/01 17 56 <br /> Total Purgeable Hydrocarbons (C6-C12), BTE_X and MTBE by DHS LUFT - 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 1080021 -EPA 5030B (P/T) <br /> Blank(1080021-BLKI) Prepared&Analyzed 07/31/01 _ <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene ND 050 <br /> Toluene ND 050 J <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) T ND 050 — — <br /> Methyl tent-butyl ether ND 2 5 I] <br /> Surrogate aaa-Triuorotoluene 114 1019 114 60-140 <br /> L_CS(1080021-BSI) Prepared&Analyzed 07/31/01 <br /> Benzene 106 050 ugll 100 106 70-130 <br /> Toluene 103 050 1100 - 103 70-130 _ <br /> Ethylbenzene 954 050 100 954 70-130 • I <br /> Xylenes(total) 309 050 300 103 70-130 <br /> Methyl tent-butyl ether 129 2 5 100 129 70-130 <br /> Surrogate a,a,a-Trifluorotoluene 115 100 115 60-140 �� <br /> Matrix Spike(1080021-MS1)_— - —Source 5107288-02 Prepared&Analyzed 07/31/01 _ -- <br /> Benzene _ 101 050 ugtl 100 ND 101 60-140 <br /> Toluene - 970 - 050 100 10 870 60-140 I <br /> Ethylbenzene 904 050 100 054 85 0 60-140 <br /> Xylenes(total) 295 050 300 30 883 60-140 <br /> Methyl tert-butyl ether 282 25 100 ND 282 60-140 _QM-07 <br /> Surrogate a,a a-Triuorotoluene 113 100 113 60-140 <br /> _Matrix Spike Dup(1080021-MSD_I)__ _ Source S107288-02 Prepared&Analyzed 07/31/01 <br /> Benzene _ 973 050 ug/l 100 ND 973 60-140 373 25 <br /> Toluene 916 050 100 10 816 60-140 573 25 <br /> Ethylbenzene - 859 050 100 - 054 805 60-140 5 10 -25 <br /> Xylenes(total) 283 050 300 30 843 60-140 4 15 25 <br /> Methyl tert-butyl ether _ 377 25 100 ND 37 7 60,140 288 25 QM-07 QR-0 <br /> 7 <br /> Surrogate a a a-Triuorotoluene 989 100 989 60-140 <br /> Sequoia Analytical-Sacramento The results to this report apply to the samples analysed in accordance with the chat <br /> custody document This analytical report must be reproduced in its entirety <br /> I <br /> Page 4 of 6 <br />