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Sequoi 680 Chesapeake Drive Redwood City CA 94063 {650)364 9600 FAX(650)x-9233 <br /> 404 N Wiget lane Walnut Creek CA 94598 1925)988 9600 FAX(925)988 9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 {916)921 9600 FAX(916)921-0t00 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma CA 94954 ;707) 792 1865 FAX(707)792-034Z <br /> 1551 Industnal Road San Carlos CA 94070 41 1 1 (650)232 9600 FAX(650)232-9612 <br /> SECOR International Project Arco 4932,Stockton,CA Sampled 6/2/99 <br /> 9912 Business Park Drive,Ste 100 Project Number N/A Received 6/3/99 <br /> Sacramento,CA 95827 Project Manager Rusty Benkosky Reported 6/8/99 <br /> Total Purgeable Hydrocarbons(C6-C12),BTEX and MTBE by DHS LUFT/Quality Control <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Batch. 906010 Date Prepared. 617199 Extractton Method. EPA 50308(MeOH) <br /> Blank 9060100-,ULKI <br /> Purgeable Hydrocarbons 6/7199 ND mg/kg 100 <br /> Benzene ND 000500 <br /> Toluene ND 000500 <br /> Ethylbenzene ND 000500 <br /> Xylenes(total) ND 000500 <br /> Methyl tent-butyl ether ND 00500 <br /> Surrogate a a a Trtfluorololuene 0100 0 191 600-140 960 <br /> LCS 9960100-BS 1 <br /> Benzene 6/7/99 0200 0 211 mg/kg 700-130 105 <br /> Toluene 0200 0 228 700-130 114 <br /> Eth [benzene 0200 0 229 700-130 114 <br /> es(total) 0 600 0 611 700-130 102 <br /> YJ <br /> Cert-butyl ether 0200 0 213 700-130 106 <br /> Surrogate a a a-Trifluorotoluene 0100 0 191 600-140 960 <br /> !Matrix Spike 9060100-MS1 5906005-01 <br /> Benzene 6/7199 0200 ND 0 187 mg/kg 600-140 93 5 <br /> Toluene 0200 ND 0 199 600-140 995 <br /> Ethylbenzene 0200 ND 0202 600-140 101 <br /> Xylenes(total) 0 600 ND 0 552 600-140 920 <br /> Methyl tert-butyl ether 0200 ND 0 172 600-140 860 ' <br /> Surrogate a a a-Trifluorotoluene 0200 0 192 600-140 960 <br /> Matrix Spike Dup_ 9060100-MSOI S906005-01 <br /> Benzene 6/7199 0200 ND 0 181 mg/kg 600-140 905 25 0 3 26 <br /> Toluene 0200 ND 0 187 600-140 935 250 622 <br /> Ethylbenzene 0200 ND 0 198 600-140 990 25 0 200 <br /> Xylenes(total) 0 600 ND 0 539 600-140 898 25 0 242 <br /> Methyl tert-butyl ether 0200 ND 0 173 600-140 865 250 0 580 <br /> Surrogate aaa-Trrfluorotoluene 0200 0 189 600-140 945 <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and definitions <br /> Sandra R Hanson,Client Services Representative Page 4 of 6 <br />