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Sequoia 68o Chesapeake Drive Redwood City CA 94063 (650)364-9600 Fvc(650)364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FkX(925)988-9673 <br /> Analytical 1119 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FkX(916)921 0100 <br /> 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FkX(707)792 0342 <br /> i <br /> Upgradient Environmental Consultants Protect Conrady Property Sampled 9/24/98 <br /> 336 Augusta Court Project Number N/A Received 9/24/98 <br /> Valley Sp,CA 95252 Project Manager Vic Cherven Reported 10/8198 <br /> Total Purgeable Hydrocarbons(C6-C12)and BTEX by DHS LUFT/Quality Control <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> LAnalyte Analyzed Level Result Result Units Recov Limits % Limit % Notes" <br /> 8100073-BSI <br /> Ethylbenzene 10/5/98 100 978 ug/l 700-130 978 <br /> Xylenes(total) 300 29 3 700-130 977 <br /> Surrogate a,a a-Trifluorotoluene 100 10 2 600-140 102 <br /> Matrix Spike 8100073-MSI sS02310-05 <br /> Benzene 10/5198 100 ND it 0 ug/l 600-140 110 <br /> Toluene 100 ND 10 3 600-140 103 <br /> Ethylbenzene 100 ND 10 1 600-140 101 <br /> Xylenes(total) 300 ND 30 1 600-140 100 <br /> Surrogate a,a a-Tr fluorololuene 10 0 10 2 600-140 102 <br /> Matrixpike Dun 8100073-MSDI S809310-05 <br /> Benzene 1015/98 100 ND 10 9 ug/l 600-140 109 250 0 913 <br /> Toluene 100 ND 10 1 600-140 101 25 0 196 <br /> Wyley[benzene 100 ND 9 86 600-140 98 6 25 0 240 <br /> nes(total) 300 ND 29 4 600-140 98 0 25 0 202 <br /> Surrogate a,a,a-Trifluorotoluene /00 101 600-140 101 <br /> Batch, 8100074 Vatc prepared. 1015198 Extraction Method, EPA 5030 (PIT} <br /> IlR 8100074-BLK1 <br /> Purgeable Hydrocarbons 10/5198 ND ug/l 500 <br /> Benzene ND 0 500 <br /> Toluene ND 0 500 <br /> Ethylbenzene ND 0 500 <br /> Xylenes(total) ND 0 500 <br /> Surrogate a a a-Trifluorotoluene 100 985 600-140 985 <br /> L CS 8100074-BSI <br /> Benzene 1015/98 too 104 ug/I 700-130 104 <br /> Toluene 100 988 700-130 988 <br /> Ethylbenzene 100 957 700-130 957 <br /> Xylenes(total) 300 285 700-130 95 0 <br /> Surrogate a a a-Triuorotoluene 100 962 600-140 962 <br /> Matrix Spike 8100074-MSI S809318-01 <br /> Benzene 10/5/98 100 ND 104 ug/l 600-140 104 <br /> Toluene 100 ND 9 85 600-140 98 5 <br /> Ethylbenzene 100 ND 966 600-140 966 <br /> Xylenes(total) 300 ND 28 7 600-140 957 <br /> Surrogate a,a a-Trifluorotoluene 100 998 600-140 998 <br /> Aft <br /> 7ivota nalyticai-Sacramento *Refer to end ofreport for texi of notes and definitions <br /> andC Si hn tder,Laboratory Direct6r Page 5 of 7 <br />