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' 680 Chesapeake Dave Redwood Gty 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 Stnker 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 /> i 551 Industrial Road San Carlos CA 94070 4111 (650)232-9600 FAX(650)232-9612 <br /> innacle-C P Project ARCO 6020,Manteca,CA Sampled 517199 to 5/11199 <br /> 3939 Cambridge Road,Ste 220 Project Number N/A Received 5/12/99 <br /> ameron Park,CA 95682 Project Manager Joel Coffman Reported 5/27/99 <br /> Total Purgeable Hydrocarbons(C6-Ci2)and BTEX 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 /> Ratch. 9050213 Date Prepared 5/18/99 Extraction Method. FPA 5030B(MeOH) <br /> NhIank 9050213-SLK] <br /> Purgeable Hydrocarbons 5/18/99 ND mg/kg 100 <br /> enzene ND 000500 <br /> oluene ND 000500 <br /> Ethylbenzene ND 000500 <br /> ylenes(total) ND 000500 <br /> urrogate a a,a-Trtuorotoluene 0200 0171 600-140 85 5 <br /> LSCS 9050213-BS1 <br /> enzene 5/18199 0200 0203 mg/kg 700-130 101 <br /> oluene 0200 0 216 700-130 108 <br /> thylbenzene 0200 0 218 700-130 109 <br /> Xylenes(total) 0 600 0 584 700-130 973 <br />§Jrog�a, 17 a a-Trrfluorotoluene 0200 0 180 600-140 900 <br /> Matrix Spike 9050213-MS1 S905178-02 <br /> enzene 5/18/99 0200 ND 0 178 mg/kg 600-140 890 <br /> oluene 0200 ND 0 191 60 0-140 955 <br /> thylbenzene 0200 ND 0 192 600-140 960 <br /> Xylenes(total) 0 600 ND 0 523 600-140 87 2 <br /> urrogate a a a-Trifluorotoluene 0200 0 178 600-140 890 <br /> Matra 5p�l.e Dao 9Q50213-MSD1 5905178-02 <br /> Ienzene 5/18/99 0200 ND 0 176 mg/kg 600-140 880 250 1 13 <br /> oluene 0200 ND 0 180 600-140 900 250 593 <br /> thylberizene 0200 ND 0 189 600-140 945 25 0 1 57 <br /> Xylenes(total) 0 600 ND 0 516 600-140 860 250 1 39 <br /> urrogate a,a a-Trifluorotoluene 0200 0 179 600-140 895 <br /> i <br /> IF <br /> 1 <br /> equoia Analytical-Sacramento *Refer to end of report for text of noles and defurmons <br /> r <br /> onald W Bobel Client Services Repres tative Page"of 10 <br />