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680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364 9233 <br /> Sequoia 404 N Wiget Lane Walnut Creek CA 94598 (925)988 9600 FAX(925)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792-1865 FAX(707)792-0342 <br /> 1551 Industrial Road San Carlos CA 94070-4111 (650)232-9600 FAX(650)232-9612 <br /> mnade-C P Project ARCO 6020,Manteca,CA Sampled 5/11/99 <br /> 3939 Cambridge Road Ste 220 Project Number NIA Received 5111199 <br /> ameron Park,CA 95682 Project Manager Joel Coffman Reported 5/12/,5/13/99 <br /> Total Purgeable Hydrocarbons(C6-C12) and BTEX by DHS LUFTIQualtty Control <br /> Sequoia Analytical-Sacramento <br /> latchDate Spike Sample QC Reporting Limit Recov RPD RPD <br /> . <br /> nalyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Date Prepared, 5111199 Extraction Method, EPA 5030B(MeOli) <br /> Blank 9050111-BLKI <br /> urgeable Hydrocarbons 5/11/99 ND mg/kg 100 <br /> enzene ND 000500 <br /> oluene ND 000500 <br /> Ethylbenzene ND 000500 <br /> Iff ylenes(total) ND 000500 <br /> urrogate a a a-Trrfluorotoluene 0200 0 184 600-140 92 0 <br /> LCS 9050111-BS1 <br /> Renzcnc 5/11199 0200 0 190 mglkg 700-130 95 0 <br /> luene 0200 0205 700-130 102 <br /> Ethylbenzene 0200 0208 700-130 104 <br /> lenes(total) 0 600 0 563 700-130 93 8 <br /> 'agate a s a-Trrfluorotoluene 0200 0 184 600-140 92 0 <br /> Matrix Spike 9050111-MSI 5905119-01 <br /> wenzene 5111199 0200 ND 0 183 mg/kg 600-140 91 5 <br /> oluene 0200 ND 0 194 600-140 97 0 <br /> Ethylbenzene 0200 ND 0 195 600-140 97 5 <br />_,Xylenes(total) 0 600 ND 0 537 600-140 895 <br /> urrogate a s a-Trrfluorotoluene 0200 0 187 600-140 93 5 <br /> Matrix Spike Dunt• 9050111-MSD 1 S905119-U <br /> Ienzene 5/11/99 0200 ND 0 184 mg/kg 600-140 92 0 250 0 545 <br /> oluene 0200 ND 0 187 600-140 93 5 25 0 367 <br /> thylbenzene 0200 ND 0 196 600-140 980 250 0 512 <br /> Xylenes(total) 0 600 ND 0 538 600-140 897 25 0 0 223 <br /> urrogate a s a-Trrfluorotoluene 0200 0 189 600-140 94 S <br /> J,quoia Analytical-Sacramento *Refer to end of report far text of noles and definutons <br /> onald W Babel,Client Services Rep sentative ,Q Page 5 of 9 <br />