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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650) 364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (925)988 9600 FAX(925)988 9673 <br /> Analytical 819 Straker Avenue Suite 8 Sacramento CA 95834 (916)921 9600 FAX(916)921 Of00 <br /> 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792 1865 FAX(707)792 0342 <br /> EMCOn - Pinnacle Project Arco 2168,Stockton,CA Sampled 11/9/98 <br /> 1433 N Market Bfvd Project Number 2 1775-234 003 <br /> Received 11/10/98 <br /> Sacramento,CA 95834 <br /> Project Manager Dave Foley Reported 11/24/98 <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 /> Blank(con trtil 8110135-BLK1 <br /> Surrogate a a a-Tnfluorotoluene I1/1 2/98 100 9 77 ug/1 600 140 977 <br /> LCS 8110135-BS1 <br /> 3enzene 11/12/98 10 0 993 ug/l 700-130 993 <br /> foluene 10 0 927 <br /> 700-130 927 <br />�thylbenzene 10 0 921 70 0-130 92 1 <br /><ylenes(total) 300 275 70 0-130 9I 1 <br /> Methyl Cert-butyl ether 100 837 700-130 83 7 <br /> urrogate a a a-Trrfluorotoluene 10 0 998 60 0-140 99 8 <br /> Matrix . lultg $110135-MSI $811154-U <br /> Benzene 11/12/98 IO 0 ND 103 u /I <br /> oluene g 600-140 103 <br /> 100 ND 9 78 600-140 97$ <br /> th�ene 100 ND 9 63 60 0-140 96 3 <br /> yl�1�l(total) 300 ND 28 8 600-140 <br /> lethyl tert-butyl ether 96 0 <br /> ]0 0 ND 11 3 60 0-140 1I3 <br /> urrogate aaa-TrYluorotoluene 100 940 b0 0-140 94 0 <br /> latrtx Spihc Dup 8110135-MSD S811154-16 � <br /> enzene 11/12/98 100 ND 9 75 ug/l 600-140 975 25 0 5 49 <br /> oiuene 100 ND 935 60 0-140 93 S 25 0 4 50 <br />'hylbenzene 100 ND 9 23 60 0-140 92 3 25 0 4 24 <br /> ylenes(total) 300 ND 27 7 600-140 923 25 0 3 93 <br /> ethyl tert-butyl ether 100 ND 7 58 60 0-140 7S 8 25 0 394 4 <br /> rrrogate a a a-Triuorotoluene 100 9 11 b0 0-140 91 1 <br /> uoia Analytical-Sacramento *Refer to end of repos t for text ofnotes and definitions <br /> iald 113obel,Client Services Representa ive Page 7 of 9 <br />