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Sequoia 680 Chesapeake Drive Redv,00d City CA 94063 (650) 364-9600 FAX(650)364 9233 <br /> 404 N Wiget Lane 1Valnut Creek CA 94598 (925)968 9600 FAX(925)988 9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921 9600 FAX(916)921 0100 <br /> 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707) 792 1865 FAX(707) 792 0342 <br /> is <br /> SECOR International Project ARCO 2133,Stockton,CA Sampled 9110/98 <br /> 9912 Business Part. Drive, Ste 100 Project Number Contract 4 22232 03 Received 9/14/98 <br /> Sacramento,CA 9DS27 Ptoject Manager Rusty Benkoskv Reported 9/28/98 <br /> Total Purgeable Hydrocarbons(C6-02), BTEC: and R'ITBE by DHS LUFT/Quality Control <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Lunit Recov RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Limits % Limit % Notes' <br /> 5 Date PrImared 9121198 Extraction Method EPA 50308(P/Tl <br /> Bl2nk 8090205-13LKI <br /> PurgeableFlydrocatbons 9121/98 ND ug/l 500 <br /> Benzene ND 0 500 <br /> Toluene ND 0 500 <br /> Ethylbenzene ND 0 500 <br /> Xylenes(total) ND 0 500 <br /> Methyl tert-butyl ether ND 500 <br /> Suri agate u a a-Trifluorotoluene 100 9 79 600-140 979 <br /> LCE 8090205-BS 1 <br /> Benzene 9/21/98 100 108 ug/l 700-130 108 <br /> Toluene 100 10 l 700-130 101 <br /> Ethylbenzene 100 993 700-130 993 <br /> 6 Ines(total) 300 29 6 700-130 987 <br /> hyl Cert-butyl ether 100 11 5 700-130 H5 <br /> Sui i ogate aaa-Triflum otoluene 100 9 70 600-140 970 <br /> Matrix Spike 8090205-MSI S809227-03 <br /> Benzene 9/21196 100 ND 106 ug/l 600-140 106 <br /> Toluene 100 ND 997 600-140 997 <br /> Ethylbenzene 100 ND 995 60 0-140 995 <br /> Xylenes(total) 300 ND 29 7 600-140 990 <br /> Methyl tert-butyl ether 100 ND 11 0 600-140 110 <br /> Surrogate a a a-Tt ifluorotoluene 100 938 600-140 93 8 <br /> Matrix Sulke Duu - S809227-03 <br /> Benzene 9121198 100 ND 106 ug/l 600-140 106 25 0 0 <br /> Toluene 100 ND 987 600-140 98 7 250 1 01 <br /> Ethylbenzene 100 ND 967 600-140 967 25 0 285 <br /> Xylenes(total) 300 ND 28 9 600-140 963 25 0 276 <br /> Methyl tent-butyl ether 100 ND 10 6 600-140 106 250 3 70 <br /> Surrogate a a a-Trijluorotoluene 10 0 931 600-140 93 1 <br /> equoia Analytical - Sacramento *Refer to end of i eport for text of notes and definitions <br /> in a C Schnei er, Laboratory Director page 4 of 5 <br />