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Sequoia 819 Striker Avenue Suite 8 <br /> Sacramento CA 95834 <br /> (916) 921-9600 <br /> Analytical <br /> FAx(916)X21-0100 <br /> i <br /> Upgradient Enviromental-Stockton Project Teresi Trucking Sampled 8119/99 <br /> P O Box 8002 Project Number N/A Received 8/20/99 <br /> Stockton,CA 95208 Project Manager Vic Cherven Reported 9/3/99 <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 /> Analyte Analyzed Level Result Result Units Recov Limits % Limit % Nates* <br /> Batch 9080196 Date Prepared 8124/9.9 Extraction Method EPA 5030B(PIT) <br /> Blank 9080196-BLKI <br /> Purgeable Hydrocarbons 8/24/99 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 /> Surrogate a a,a-Triuorotoluene 100 898 600-140 898 <br /> LCS 9080196-BSI <br /> Benzene 8/24/99 100 8 88 ug/l 700-130 888 <br /> Toluene 100 890 700-130 89 0 <br /> Ethylbenzene 100 893 700-130 893 <br /> Xylenes(total) 300 270 700-130 900 <br /> rogate a a a-Trifluorotoluene 100 9 49 600-140 94 9 <br /> Matrix Spike 9080196-MSI 5908228-01 <br /> Benzene 8/24/99 100 1 78 108 ug/l 600-140 902 <br /> Toluene 100 ND 888 600-140 888 <br /> Ethylbenzene 100 ND 950 600-140 95 0 <br /> Xylenes(total) _ _ 300 0 961 28 2 600-140 90 8 <br /> Surrogate a a a-Tris luorotoluene 100 917 600-140 W7 <br /> Matrix Spike Dup 9080196-MSDI 5908228-01 <br /> Benzene 8/24/99 100 1 78 104 ug/l 600-140 862 250 454 <br /> Toluene too ND 879 600-140 879 250 102 <br /> Ethylbenzene 100 ND 9 42 600-140 942 250 0 846 <br /> Xylenes(total) _ __ tol30 0 0 961 28 1 600-140 905 _25.0 0 331 <br /> Surrogate a a a-Tnfluorouene If)0 896 600-140 896 <br /> Batch 9080210 Date Prepared 8/25199 Extraction Method EPA 5019D(PIT) <br /> Blank 9080210-BLKI <br /> Purgeable Hydrocarbons 8125/99 ND ug/1 50 0 <br /> Benzene ND 0 500 <br /> Toluene ND 0 500 <br /> Ethylbenzene ND 0 500 <br /> Xvlees(total) _ _ _ _ ND 0 <br /> Surrogate a a a-Trifluorotoluene 100 909 600-140 90 9 <br /> LCS 9080210-BSI <br /> Benzene 8/25/99 too 9 01 ug/l 700-130 90 1 <br /> ene " 100 905 700-130 905 <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and definitions <br /> Page 5 of 9 <br />