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680 Chesapeake Drive Redwood Ci CA 94063 <br /> Sequoia p City (650)364-9600 FAX(650)364-9233 <br /> Sz 404 N Wiget[ane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> Analytical $19 Sinker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 1455 McDowell BNd North Ste D Petaluma.CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Sequoia-RC(Subbed In) Project Kayvon Kimyai Sampled 2/23/99 to 2125/99 <br /> 680 Chesapeake Dr Project Number 9902E24/E25 Received 3/3/99 <br /> Redwood City,CA 94063 Project Manager Kayvan Kimyai Reported 3/12199 <br /> Volatile Organic Compounds by EPA Method 8260B/Quality Control <br /> Sequoia Analytical-Petaluma <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> JAnalyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> LCS(continued) 9030221-BS1 <br /> Surrogate 4-Bromofluorobenzene 319/99 00500 00515 mg/kg 740-121 103 <br /> LCS --- 1-BS2 <br /> 3/10/9 - -- <br /> _MethyE tert-butyl ether 3110199 00500 00474 mg/kg 700-130 948 <br /> Surrogate Dibromofluoromethane ff 00500 00536 to 800-120 107 <br /> Surrogate 12-Dichloroethane-d4 If 00500 00564 800420 113 <br /> Surrogate Toluene-d8 If 00500 00484 810-117 968 <br /> Surrogate 4-Bromofluorobenzene If 00500 00531 740-121 106 <br /> LCS 9030221-BS3 <br /> Methyl tert-butyl ether 3111/99 00500 00446 mg/kg 700-130 89 2 _ <br /> Surrogate Dibromofluoromethane 00500 00520 11 800-120 104 <br /> Surrogate 1 2-Dichloroethane-d4 00500 00563 IF <br /> 800-120 113 <br /> rogate Toluene-d8 00500 00436 810-117 872 <br /> rogate 4-Bromofluorobenzene 00500 00303 740-121 101 <br /> Matnx Spike 9030221-MSI P903097-23 <br /> i Methyl tert-butyl ether 3/9/99 00500 ND 00520 mg/kg 700-130 104 - �� <br /> I Surrogate Dibromofluoromethane 00500 00492 800-120 984 <br /> Surrogate 1,2-Dichloroethane-d4 00500 00535 800-120 111 <br /> Surrogate Toluene-d8 00500 00457 810-117 914 <br /> Surrogate 4-Bromofluorobenzene 00500 00472 740-121 944 <br /> Matrix Spike Duv 9030221-MSD1 P903097-23 <br /> Methyl tert-butyl ether 3/9/99 00500 ND 00535 mg/kg 700-130 107 200 2 84 _- <br /> Surrogate Dibromofluoromethane 000500 00S09 800-120 101 <br /> Surrogate 1,2-Dichloroethane-d4 00500 00574 800-120 115 <br /> Surrogate Toluene-d8 00500 00463 810-117 926 <br /> Surrogate 4-Bromofluorobenzene 00500 00506 740-121 101 <br /> I <br /> I <br /> k equoia Analytical-Petaluma *Refer to end of report for text of notes and definitions <br /> Page 21 of 22 <br /> �6C�' <br />