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1551 Industrial Road <br /> Sequoia San Carlos, CA 94070-4111 <br /> (650) 232-9600 <br /> Analytical FAX (650) 232-9612 <br /> Blaine Tech Services Project Chevron(3) Sampled 11/17/99 <br /> 1680 Rogers Avenue Project Number Chevron 9-6171/991117-R2 Received 11/18/99 <br /> San Jose,CA 95112 Project Manager Scott Boor Reported 1217199 <br /> Total Purgeable Hydrocarbons(C6-C12),BTEX and MTBE by DHS LUFT/QuaLty Control <br /> Sequoia Analytical-San Carlos <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Batch 9110169 Date Prepared 11/30/99 Extraction Method EPA 5030B PIT <br /> Blank 9110169-BLK1 <br /> Purgeable Hydrocarbons as Gasoline 11/30/99 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 5 00 <br /> Surrogate a,a,a-Trifluorotoluene 100 106 700-130 106 <br /> LCS 9110169-BSI <br /> Benzene 11/30/99 100 9 53 ug/l 700-130 95 3 <br /> Toluene 100 920 700-130 920 <br /> Ethylbenzene 100 9 60 700-130 960 <br /> X lenes(total) 300 282 700-130 940 <br /> gate a a a-Trifluorotoluene 100 107 700-130 107 <br /> LCS 9110169-BS2 <br /> Purgeable Hydrocarbons as Gasoline 11/30/99 250 225 ug/l 700-130 900 <br /> Surrogate a,a,a-Trifluorotoluene 11100 903 700-130 903 <br /> Matrix Spike 9110169-MSI L911260-15 <br /> Purgeabie Hydrocarbons as Gasoline 11/30/99 250 ND 225 ug/l 600-140 900 <br /> Surrogate a a a-Trifluorotoluene Ff 100 966 700-130 966 <br /> Matrix Spike Dup 9110169-MSD1 L911260-15 <br /> Purgeable Hydrocarbons as Gasoline 11/30/99 250 ND 236 ug/1 600-140 944 250 477 <br /> Surrogate a,a a-Trifluorotoluene 11 100 9 71 f, 700-130 971 <br /> Batch 9110171 Date Prepared 11/30/99 Extraction Method EPA 5030B PPF <br /> Blank 9110171-BLK1 <br /> Purgeable Hydrocarbons as Gasoline 11/30/99 ND ug/l 500 <br /> Benzene " ND 0 500 <br /> Toluene it 1" 0 500 <br /> Ethylbenzene ND 0 500 <br /> Xylenes(total) ND 0 500 <br /> Methyl tent-butyl ether ND Soo <br /> Surrogate a a,a-Trrfluorotoluene 100 102 700-130 102 <br /> LCS 9110171-BS1 <br /> Benzene 11/30/99 100 990 ugA 700-130 990 <br /> Toluene 100 9 61 700-130 961 <br /> oia Analytical- San Carlos *Refer to end of report for text of notes and definitions <br /> Page 6 of 12 <br />