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Sequoia 819 Striker Avenue,Suite 8 U e qu o 1 a Sacramento, CA 95834 (916) 921-9600 FAX(916) 921-0100 Analytical www sequoialabs com atus Environmental Project ARCO 2168,Stockton,CA Sampled 8/30/00 3330 Cameron Park Drive, Ste 550 Project Number N/A Received 911100 Cameron Park, CA 95682Project Manager Jay Johnson Reported 9121,27/00 Date Spike Sample QC Reporting Limit Recov RPD RPD Analyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* Batch 0090117 Date Pre ared 9113100 Extraction Method EPA 5030B [P/TI Blank 0090117-BLK1 Benzene 9/13/00 ND ug/l 200 Toluene ND " 200 Ethylbenzene ND 200 Xylenes(total) ND 200 Surrogate 1 2-DCA-d4 500 53 0 600-140 106 Surrogate Toluene-d8 500 570 600-140 114 Surrogate 4-BFB 0 500 544 600-140 109 LCS 0090117-BS1 Benzene 9113/00 500 540 ug/i 700-130 108 Toluene 500 562 700-130 112 Surrogate 12-DCA-d4 500 52 2 600-140 104 Surrogate' Toluene-d8 500 562 600-140 112 isgate 4-BFB 500 528 600-140 106 o _..0rix Spike 0090117-MSI 5009081-01 Be-ze-e 9/13100 500 ND -)52 ug/l 700-130 110 Toluene 50 0 ND 590 700-130 118 Surrogate 1,2-DCA-d4 500 528 600-140 106 Surrogate Toluene-d8 50 0 582 600-140 116 Surrogate 4-BFB 50 0 520 600-140 104 Matrix Spike Dup 0090117-MSD1 5009081-01 Benzene 9113/00 50 0 ND 576 ug/I 700-130 115 25 0 444 Toluene 500 ND 602 700-130 120 250 168 Surrogate 1,2-DCA-d4 Soo 544 600-140 109 Surrogate Toluene-d8 50 0 58 8 600-140 118 Surrogate 4-BFB 500 540 600-140 108 Batch 0090163 Date Prepared 9/15100 Extraction Method EPA_5030B 1P/Tl Blank 0090163-BLKI Benzene 9/15/00 ND ug/I 200 Toluene ND 200 Ethylbenzene ND 200 Xylenes(total) _ -ND 200 Surrogate 12-DCA-d4 500 518 600-140 104 Surrogate Toluene-d8 500 574 600-140 115 Surrogate 4-BFB 500 52 4 600-140 105 a Analytical-Sacramento nitionse *Refer to end o re ort or text o notes and de i f .� r f f f Page 16 of 22