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680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX 1650)364 9233 <br /> Sequoia 404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX 1925)988-9673 <br /> 819 Stnker Avenue Suite 8 Sacramento CA 95834 (916)921 9600 FAX(916)921-0100 <br /> 1415 <br /> �,,,�► IndustrialMcDowell <br /> North Ste DPetaluma Carlos CA 94070-4111 (650)232 9600 FAX(650)232 961 <br /> Analytical 1551duus <br /> 2 <br /> Sherwood Labs Project Vogue C leaners Sampled 4/1199 <br /> P O Box 937 Project Number N/A Received 416199 <br /> Hilmar,CA 95324 Project Manager Ste hang Rossow Re orted 4120199 <br /> Volatile Oxygenate Compounds by LPA Method 8260A/Quality Control <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> lAnalyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Hatch, 9040174 Date Prepared, 4/14199 Extraction Method, EPA 5030B 1P/Tl <br /> Blank 9040174-BLKl <br /> Tert-butyl alcohol 4/14/99 ND ug/l 200 <br /> Methyl tert-butyl ether ND 200 <br /> Di-isopropyl ether ND 200 <br /> Ethyl Cert-butyl ether ND 200 <br /> Tert-amyl methyl ether ND 200 <br /> Ethanol ND 3000 <br /> Surrogate 12-DCA-d4 500 510 600-140 102 <br /> LCS 9040174-BSI <br /> Methyl tent-butyl ether 4114199 500 624 ug/l 70 0-130 125 <br /> Surrogate 1,2-DCA-d4 500 541 600-140 108 <br /> 9040174-MS1 &904052AA <br /> Why]tert-butyl ether 4114199 Soo 200 _55 6 ug/l 600-140 107 <br /> Surrogate 1 2-DCA-d4 " 500 54 2 600-140 108 <br /> Nlatrix Spike niin 9040174--MSD/ 5904052-04 <br /> Methyl tert-butyl ether 4114/99 500 200 590 ug/1 600-140 114 25 0 633 <br /> Surrogate 1 2-DCA-d4 500 548 01 600-140 110 <br /> I <br /> Sequoia Analytical-Sacramento *Refer to end of report far text of notes and definitions <br /> - <br /> Sandra R Hanson,Client Services Representative Page 13 of 14 <br />