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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 (925)988-9600 FAX(925)988-9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> 1551 Industrial Road San Carlos, CA 94070-4111 (650)232-9600 FAX(650)132-9612 <br /> IRed <br /> uoia-Redwood City Project Mei Mei Shin Sampled 3/19/99 <br /> Chesapeake Drive ProjectNumber 9903B91(Blaine) Received 3/30/99 <br /> wood City,CA 94063 Project Manager Mei Mei Shin Reported 4/1/99 <br /> Total Purgeable Hydrocarbons(Cb-C12),BTEX and MTBE by DHS LUFT/Quahty 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 9030144 Date Prepared 3/30199 Extraction Method EPA 5030B JP/Tl <br /> Blank 9030144-BLK1 <br /> Purgeable Hydrocarbons as Gasoline 3/30/99 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 500 <br /> Surrogate a,a a-Trifluorotoluene 100 116 700-130 116 <br /> LCS 9030144-BS1 <br /> Purgeable Hydrocarbons as Gasoline 3/30/99 250 263 ug/l 700-130 105 <br /> Surrogate a,a,a-Trifluorotoluene to 100 183 OP 700-130 183 2 <br /> Matrix Spike 9030144-MSI L903223-01 <br /> rgeable Hydrocarbons as Gasoline 3130/99 250 ND 268 ugll 600-140 107 <br /> rogate a,a,a-Trifluorotoluene if 100 18 6 ff 700-130 186 2 <br /> Matrix Spike Du 9030144-MSD1 L903223-01 <br /> Purgeable Hydrocarbons as Gasoline 3/30199 250 ND 271 ug/l 600-140 108 250 0 930 <br /> Surrogate a a a-Trifluorotoluene 100 191 of 700-130 191 2 <br /> Batch 9040002 Date Prepared 411199 Extraction Method EPA 5030B CP/Tl <br /> Blank 9040002-BLK1 <br /> Purgeable Hydrocarbons as Gasoline 4/1/99 ND ugll Soo <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-Trrf7uoroto1uene 100 10 6 700-130 106 <br /> LCS 9040002-BSI <br /> Purgeable Hydrocarbons as Gasoline 4/1/99 250 263 ug/l 700-130 105 <br /> Surrogate a,a a-Trifluorotoluene 100 108 10 700-130 108 <br /> Batch 9040006 Date Prepared_ 3131199 Extraction Method EPA 5030B [P/Tl <br /> Blank 9040006-BLK1 <br /> Purgeabie Hydrocarbons as Gasoline 3/31/99 ND ugll 500 <br /> Benzene ND 0 500 <br /> Toluene ND 0 500 <br /> Ethylbenzene ND 0 500 <br /> i <br /> uoia Analytical- San Carlos *Refer to end of report far text of notes and definitions <br /> I <br /> Page 6 of 9 <br />