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Sequoia 680 Chesapeake Diive Redwood Cry CA 94063 (650) 364 9000 FAX (650)3u4 9233 <br /> 404 N Wiget Lane Wafnut Creek CA 94598 (925)988 9600 FAX(925)988 9673 <br /> 15) 819 Sinker Avenue Suite 11 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 /> IW 1551 Industrial Road San Carlos CA 94070 41 1 1 (650)232 9600 FAX{650)23Z 9612 <br /> 11 <br /> Emcon -Pinnacle Project Arco 2168,Stockton,CA Sampled 2/17/99 to 2/18/99 <br /> 3939 Cambridge Road,Ste 202 Project Number 21775-234 004 <br /> Received 2I1$I99 <br /> Cameron Park,CA 95682 <br /> Project Manager Dave Folev Reported 3/4/99 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFT/Quality Control <br /> Sequoia Analytical -Sacramento <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Batch. 9020261 <br /> Blank 902026L LK1 <br /> Purgeable Hydrocarbons 2/22/99 ND ug/I 500 <br /> Benzene ND 0 500 <br /> Toluene <br /> Ethylbenzene ND 0500 <br /> 0 500 <br /> Xylenes(total) ND 0 500 <br /> Methyl tert-butyl ether ND 500 <br /> Surrogate a a,a-Trtfuorotoluene <br /> 100 962 600-140 962 <br /> IES 241�41_SSI <br /> Benzene 2/22/99 100 958 ug/1 70 0-130 95 8 <br /> Toluene 10 0 972 70 0-130 97 2 <br /> Ethylbenzene to 0 9-51 70 0-130 95 l <br />�yln {total) 30 0 28 7 70 0-130 95 7eit-butyl ether 10 0 9 l270 0-130 91 2te a a,a-Tr�uorotoluene 1 <br /> 0 0 9 79 60 0-140 97 9 <br /> Uatrix Spike 9020261-MSI S902251-10 <br /> 3enzene 2/22199 10 0 ND 964 ug/l 600-140 964 <br />.-oluene 100 ND 962 600-140 962 <br />:thylbenzene 10 0 ND 9 51 <br /> 600-140 95 1 <br /> Cylenes(total) 300 ND 28 9 600-140 963 <br /> 4ethyl tert-butyl ether 100 ND 12 7 600-140 127 <br /> urrogate a a,a-TrYZuorotoluene /00 9588 0-140 95 8 <br /> 9020261-MSD1 5902251-10 <br /> enzene 2122/99 l0 0 ND 963 ug/I 600-140 96 3 25 0 0 104 <br /> oluene 10 0 ND 960 600-140 960 25 0 0 208 <br /> thylbenzene 10 0 ND 952 600-140 95 2 25 0 0 105 <br /> ylenes(total) 300 ND 28 8 60 0-140 96 0 25 0 0 312 <br />(ethyl tent-butyl ether 100 ND 139 600-140 39 25 0 9 02 <br /> 1 <br /> arrogate a a,a-Trifuorotoluene 'I 100 990 60 0-140 91 0 <br /> arch 90 0272 Date Prepared 2123199 <br /> EXI7'$CtlOn Method F.pA 5DJOB1P1T) <br /> 9020272-EILK1 <br /> irgeable Hydrocarbons 2/23/99 ND ug/1 500 <br />,nzene <br /> rluene ND 0500 <br /> hylbenzene ND 0500 <br /> 0 500 <br /> ylenes(total) ND 0 500 <br /> eth l tert-butyl ether ND 500 <br /> q Analytical-Sacramento *Refer to end ofreport for text of notes and defimazons <br /> nold W Sobel,Client Services Representative Page 6 of 10 <br /> rP� <br />