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Sequoia 1551 Industrial Road <br /> `� San Carlos CA 94070-4111 <br /> (650) 232-9600 <br /> Analytical <br /> FAX(650) 232-9612 <br /> lame Tech Services Project Chevron(3) Sampled 5/19199 <br /> 1680 Rogers Avenue Project Number Chevron/9-6171/990519-C2 Received 5/21/99 <br /> San Jose,CA 95112 Project Mama ger Christine Lillie Reported 6/4/99 <br /> -Total Pu rgeable Hydrocarbons(C6=Cl2j,'tTEX and MTBE by DHSL] 3IW /Quality Control - -- - <br /> Sequoia Anaiytir�i-Saga Carlos <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Batch 9060012 Date Prepared 6/2/99 Extraction Method EPA 5030E [P/T1 <br /> Blank 9060012-BLK1 <br /> Purgeable Hydrocarbons as Gasoline 612/99 ND ug/l Soo <br /> Benzene 11 ND 0 500 <br /> Toluene ND " 0 500 <br /> Ethylbenzene ND 0 500 <br /> Xylenes(total) ND 0 500 <br /> Methyl tert-butyl ether ND 500 <br /> Surrogate a,a,a-Trifluorotoluene .100 987 700-130 987 <br /> LCS 9060012-BS1 <br /> Benzene 612/99 100 928 ug/l 700-130 928 <br /> Toluene 100 907 700-130 907 <br /> Ethylbenzene 100 861 700-130 861 <br /> Xylenes(total) 300 283 700-130 943 <br /> rogate a,a,a-Trifluorotoluene 100 101 700-130 101 <br /> atrix Spike 9060012-MSI L905464-04 <br /> Benzene 6/2/99 100 ND 852 ug/l 600-140 852 <br /> Toluene 100 ND 826 600-140 826 <br /> Ethylbenzene 100 ND 8 18 600-140 818 <br /> Xylenes(total) 300 ND 258 600-140 860 <br /> Surrogate a a a-Trifluorotoluene 100 836 700-130 836 <br /> Matrix Spike Dun 9060012-MSD1 L905464-04 <br /> Benzene 612/99 100 ND 939 ug/l 600-140 83 9 25 0 154 <br /> Toluene 100 ND 809 600-140 809 25 0 208 <br /> Ethylbenzene 100 ND 8 11 600-140 811 25 0 0 859 <br /> Xylenes(total) 300 ND 25 2 600-140 840 25 0 235 <br /> Surrogate a a,a-Trifluorotoluene 100 898 700-130 898 <br /> Batch 9060013 Date Prepared 6/2/99 Extraction Method_EPA 5030B FP/Tl <br /> Blank 9060013-BLKI <br /> Purgeable Hydrocarbons as Gasoline 6/2/99 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 /> Methyl tert-butyl ether ND 500 <br /> Surrogate a,a,a-Trifluorotoluene 100 9 71 700-130 971 <br /> uoia Analytical- San Carlos *Refer to end of report for text of notes and definitions <br /> Page 10 of 13 <br />