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I Sequoia 680 Chesapeake Drive Redwood Ory CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 404 N Wiget[ane Walnut Creek CA 94598 (925)988-9600 FAX(92S)988-9673 <br /> Analytical <br /> 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 /> 0) <br /> ISequoia-RC(Subbed In) Project Kayvon Kimyai Sampled 2123/99 to 2125/99 <br /> 680 Chesapeake Dr Project Number 9902E24/E25 Received 3/3199 <br /> Redwood City,CA 94063 Project Manager Ka an Kim ai Reported 3/12/99 <br /> IVolatile Organic Compounds by EPA Method 8260B/Quality Control <br /> Sequoia Analytical-Petaluma <br /> Date Spike Sample QC Reporting Linut Recov RPD RPD <br /> JAnalyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Blank 9020614-BLK5 <br /> Tert-amyl methyl ether 3/9/99 ND ug/l 100 <br /> Tert-butyl alcohol to ND 200 <br /> Di-isopropyl ether ND 100 <br /> 1,2-Dibromoethane(EDB) ND r 0 500 <br /> 1,2-Dichloroethane ND 0 500 <br /> Ethanol ND 100 <br /> Ethyl tert-butyl ether ND 100 — <br /> Methyl tert-butyl ether _ _ ND 1 00 <br /> Surrogate Dibromofluoromethane 500 493 860-118 986 <br /> Surrogate 1,2-Dichloroethane-d4 500 464 800-120 928 <br /> Surrogate Toluene-d8 500 516 880-110 103 <br /> Surrogate 4-Bromofluorobenzene H500 520 860-115 104 <br /> I S — 2/20614-BS1 -� <br /> �1 tert-butyl ether 2/27199 500 480 ug/l 700-130 960 <br /> rrogate Dibromofluoromethane 5 00 471 860-118 942 <br /> Surrogate 1,2-Dichloroethane-d4 it 500 501 800-120 100 <br /> Surrogate Toluene-d8 of500 471 880-110 942 <br /> Surrogate 4-Bromofluorobenzene of500 456 to 860-115 912 <br />' LCS 9020614-BS2 <br /> Methyl tert-butyl ether 3/1/99 500 487 ug/l 70 0430 974 <br /> Surrogate Dbromofluoromethane 500 4 75 860-118 95 0 <br /> Surrogate 1,2-D:chloroethane-d4 500 506 800-120 101 <br />' Surrogate Toluene-d8 500 4 61 880-110 922 <br /> Surrogate 4-Bromofluorobenzene 500 457 to860-115 914 <br /> LCS 9020614-BS5 <br />' Methyl tert-butyl ether 3/9/99 500 408 ug/l 700-130 816 <br /> Surrogate Dibromofluoromethane PF 5 00 432 FO 860-118 864 <br /> Surrogate 1 2-Dichloroethane-d4 It500 3 99 of800-120 798 <br />' Surrogate Toluene-d8 Ff5 00 442 FF880-110 884 <br /> Surrogate 4-Bromofluorobenzene FF5 00 4 43 " 860-115 886 <br /> Matrix Spike 9020614-MS1 P902446-08 <br />' Methyl tert-butyl ether 2/27/99 500 8 78 136 ug/l 700-130 964 <br /> Surrogate Dibromofluoromethane 500 S 02 860-118 100 <br /> Surrogate 12-Dichloroethane-d4 500 540 to800-120 108 <br /> Surrogate Toluene-d8 500 4 68 to880-110 93 6 <br />' Surrogate 4-Bromofluorobenzene 500 4 61 860-115 922 <br /> } <br /> Quota Analyrical *Refer to end ofreportfar text ofnotes and definitions <br /> -Petaluma <br />' Page 13 of 22 <br />