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H <br /> Sequoia 680 Chesapeake Drive Redwood Clty CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 404 N Wrget 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 18665 FAX(707)792 0342 <br /> 1551 Industrial Road San Carlos CA 94070-4111 (650)232-9600 FAX(650)232-9612 <br /> ,0 <br /> Emcon-Pinnacle Project Arco 2168, Stockton,CA Sampled 5/25/99 <br /> 3939 Cambridge Road,Ste 202 Project Number 21775-234 004 Received 5/25/99 <br /> Cameron Park,CA 95682 Project Manager Dave Foley Reported 6/8/99 <br /> Total Pur aeable 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. 614199 Extraction Method, EPA 5030B11!/TI <br /> Blan 9060108-BLKI <br /> Purgeable Hydrocarbons 6/4/99 ND ug/1 500 <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 Soo <br /> Surrogate a s a-Trtfluorotoluene 100 929 600-140 92 9 <br /> i•C S 9060108-BSI <br /> Benzene 614/99 100 9 86 ug/l 700-130 98 6 <br /> Toluene 100 9 83 700-130 98 3 <br /> Ethylbenzene 100 9 95 700-130 99 5 <br /> Xylenes(total) 300 298 700-130 993 <br /> ' hyl tert-butyl ether 100 10 9 700-130 109 <br /> rogate a,a a-Trtfluorotoluene 100 101 600-140 101 <br /> Matrix Sntkc 9060108-MSI 5906004-02 <br /> Benzene 614199 100 ND 10 5 ug/1 600-140 105 <br /> Toluene 100 0 721 106 600-140 988 <br /> Ethylbenzene 100 ND 10 2 600-140 102 <br /> Xylenes(total) 300 ND 305 600-140 102 <br /> Methyl tert-butyl ether 100 ND 105 600-140 105 <br /> Surrogate a a a Trtfluorotoluene 100 974 600-140 974 <br /> Matrix Spike Dun 9060108-MSD1 S906004-02 <br /> Benzene 614199 100 ND 5 85 ug/1 600-140 585 250 56 9 3,4 <br /> Toluene 100 0 721 690 600-140 61 8 250 461 3 <br /> Ethylbenzene 100 ND 694 600-140 694 250 38 0 3 <br /> Xylenes(total) 300 ND 193 600-140 643 25 0 453 3 <br /> Methyl tert-butyl ether 100 ND ND 600-140 NR 25 0 200 3,4 <br /> Surrogate a a a-Trrfluorololuene 100 ND 600-140 NR 4 <br /> Batch, 9060109 Date Prepared 6/5/99 Extraction Method. EPA 5030B(P1T1 <br /> Blank 9060109 BLK1 <br /> Purgeable Hydrocarbons 614/99 ND ug/l 50 0 <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 /> /Wora Analytical-Sacramento *Refer 10 end of report for text of notes and definitions <br /> Ronald W Bobel,Client Services Re resentative Page 6 of 9 <br />