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Sequoia 9680 Chesapeake Drive Redwood City,CA 940 (650) 364 9600 FAX(650)364 9233 <br /> 1 404N Wiget Lane Walnut Creek CA 94598 (510) 988-9600 FAX(510) 988 9673 <br /> Analytical 819 Stryker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 o I oo <br /> EMCON-Sac Project Don Rogers Sampled 5/21/98 <br /> 1433 N Market Blvd Project Number 22613-100001 Received 5/22/98 <br /> Sacramento,CA 95834 Project Manager Deanna Santos Reported 6/12/98 <br /> Total Purgeable Hydrocarbons(C6-C12),BTEX and MTBE by DHS LUFT/Quality Control <br /> - _ _ Sequoia Analytical--Sacramento- <br /> Date <br /> Sacramento-Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> lAnalyte Analyzed Level Result Result //nits Recov Limits % Linut % Notes* <br /> Batch. 8060013 Date 1!rxlured. 6/1/99 Extraction Method, EP 5p 030B(EM <br /> Blank 8060013-BLK1 <br /> Purgeable Hydrocarbons 6/1/98 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 500 <br /> Surrogate a a a-Trefluorotoluene 100 893 600-140 893 <br /> LC,S 8060013-B51 <br /> Benzene 6/1/98 100 9 79 ug/l 700-130 979 <br /> Toluene to 100 906 700-130 906 <br /> Eth (benzene too 8 88 700-130 888 <br /> es(total) " 300 265 700-130 883 <br /> yl tert-butyl ether 100 11 8 700-130 118 <br /> Surrogate a a a-Trifluorotoluene 100 928 600-140 928 <br /> Matrix Spike 8060013—MS1 S80526601 <br /> Benzene 6/1/98 100 ND 101 ug/1 600-140 101 <br /> Toluene 100 ND 9 25 600-140 925 <br /> Ethylbenzene too ND 9 13 600-140 913 <br /> Xylenes(total) 300 ND 273 600-140 910 <br /> Methyl tert-butyl ether too ND 120 600-140 120 <br /> Surrogate a,a a-Trifluorotoluene 100 8 62 600-140 862 <br /> Matrix SpikeDU 8060013-MS1r]1 S8QS266-OjL <br /> Benzene 6/1/98 100 ND 105 ug/i 600-140 105 250 388 <br /> Toluene 100 ND 9 15 600-140 915 250 109 <br /> Ethylbenzene too ND 9 19 to 600-140 919 25 0 0 655 <br /> Xylenes(total) 300 ND 278 to 600-140 927 250 1 85 <br /> Methyl cert-butyl ether 100 ND 12 7 600-140 127 25 0 567 <br /> Surrogate a,a,a-Trefluorotoluene 100 856 600-140 856 <br /> 0 <br /> Sequoia Anal teal-Sacramento ' 'Refer to end of report for text of notes and definitions <br /> Ronald W Bobel,Client Services Representative Page 4 of 6 <br />