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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 (510) 988 9600 FAX(510)988 9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Upgradicnt Environmental Consultants Project Conrady Sampled 4/24/98 <br /> 336 Augusta Court Project Number NIA Received 4124198 <br /> Valle S ,CA 95252 Project Manager Vic Cherven Reported 5113198 <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 RFD <br /> Analyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Batch, 8040213 Date Prepared. 4127198 Extraction Method, EPA 5030B(PIT) <br /> Blank 8040213-BLK 1 <br /> Purgeable Hydrocarbons 4127/98 ND ug/l 500 <br /> Benzene IND 0 500 <br /> Toluene ND 0 500 <br /> Ethylbenzene ND 0 500 <br /> Xylenes(total) ND 0 500 <br /> Surrogate a a a-Triuorololuene 100 981 600-140 981 <br /> • LCS 8040213-BSI <br /> Benzene 4127198 10 0 10 4 ugll 700-130 104 <br /> Toluene 100 966 700-130 966 <br /> Ethylbenzene 100 944 700-130 944 <br /> Xylenes(total) 300 27 8 700-130 92 7 <br /> 0rrogate a,a,a-Tris luorotoluene 100 941 600-140 941 <br /> Matrix Swkt 8040213-MSI 5804222-06 <br /> Benzene 4/27198 10 0 0 857 It 4 ugll 600-140 105 <br /> Toluene 10 0 ND 982 600-140 982 <br /> Ethylbenzene too ND 923 600-140 923 <br /> Xylenes(total) 300 0 536 279 600-140 91 2 <br /> Surrogate a a a-Trifluorololuene 100 102 600-140 102 <br /> Matrix Spike Duo 8040213-MSD1 5804222-06 <br /> Benzene 4/27/98 100 0 857 11 6 ug/l 600-140 107 25 0 189 <br /> Toluene 10 0 ND 990 600-140 990 250 0 811 <br /> Ethylbenzene 10 0 ND 897 600-140 897 25 0 286 <br /> Xylenes(total) 300 0 536 26 3 600-140 859 25 0 599 <br /> Surrogate a,a,a-Triuorotoluene 100 106 600-140 106 <br /> Batch. 8040224Date-Prepared. 4128198 Extraction Methad—EFA 5030B(P/T) <br /> Blank B-940224-BLK1 <br /> Purgcable Hydrocarbons 4128198 ND ugll 500 <br /> Benzene ND 0 500 <br /> Toluene ND 0 500 <br /> Ethylbenzene ND 0 500 <br /> Xylenes(total) ND 0 500 <br /> Surrogate aaa-Trrfluorotoluene 10 0 995 600-140 995 <br /> LCS 8040224-BSI <br /> Benzene 4128198 100 104 ugll 700-130 104 <br /> aluene 100 966 700-130 966 <br /> Sequoia A lytical-Sacramento *Refer to end of report for text of notes and definitions <br /> C Schneider,Laboratory Director Page 6 of 10 <br />