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I' 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> Sequoia 404 N %Mget lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Sequoia-RC(Subbed In) Project Kayvon Kimyat Sampled 2/23/99 to 2/25/99 <br /> 680 Chesapeake Dr Project Number 9902E24/E25 Received 3/3/99 <br /> Redwood City,CA 94063 Project Manager Ka an KiTa Reported 3/12/99 <br /> Volatile Organic Compounds by EPA Method 8260BIQuahty Control <br /> Sequoia Analytical-Petaluma <br /> IDate Spike Sample QC Reporting Linut Recov RPD RPD <br /> JAnalyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Matrix Spike Dun 9020614-MSD1 P902446-08 – -- <br /> Methyl tert-butyl ether 2127/99 500 8 78 133 ug/1 700-130 90 4 15 0 642 <br /> Surrogate Dibromofluoromethane IF 500 4 95 IF 860-118 990 <br /> ISurrogate 1,2-Dichloroethane-d4 500 539 IF800-120 108 <br /> Surrogate Toluene-d8 " 500 4 72 if 880-110 944 <br /> Surrogate 4-Bromofluorobenzene it 500 4 78 IF 860-115 95 6 <br /> Batch 9030118 Date Prepared 3/4/99 Extraction Method EPA 5035 <br /> Blank 9030118-BLKI <br /> Tert-amyl methyl ether 3/4/99 ND mg/kg 000500 <br /> Tert-butyl alcohol ND 0 100 <br /> Di-isopropyl ether ND 000500 <br /> 1,2-Dibromoethane(EDB) ND 000500 <br /> 1,2-Dichloroethane ND 000500 <br /> #anol <br /> ND 0200 <br /> Itent-butyl ether ND 000500 <br /> yl tert-butyl ether ND 000500 <br /> Surrogate Dibromofluoromethane 00500 00487 800-120 974 <br /> ISurrogate 1,2-Dichloroethane-d4 00500 00495 800-120 990 <br /> Surrogate Toluene-d8 00500 00500 810-117 100 <br /> Surrogate 4-Bromofluorobenzene 00500 00484 740-121 968 <br /> Blank 9030118-BLK2 <br /> Tert-amyl methyl ether 3/8/99 ND mg/kg 000500 <br /> Tert-butyl alcohol ND 0100 <br /> IDI-isopropyl ether r ND n' 000500 <br /> 1,2-Dibromoethane(EDB) ND 000500 <br /> 1,2-Dichloroethane ItND 000500 <br /> Ethanol ItND 0200 <br /> .Ethyl tert-butyl ether ND 000500 — <br /> Methyl tert-butyl ether ND 000500 <br /> Surrogate Dibromofluoromethane to 00500 00511 800-120 102 <br /> Surrogate 1,2-Dichloroethane-d4 IF 00500 00546 it800-120 109 <br /> Surrogate Toluene-d8 if00500 00506 or 810-117 101 <br /> Surrogate 4-Bromofluorobenzene it00500 00543 of 740-121 109 <br /> Blank 903011&BLK3 <br /> Tert-amyl methyl ether 3/9/99 ND mg/kg 000500 <br /> Tert-butyl alcohol ND 0 100 <br /> Di-isopropyl ether 1, ND 000500 <br /> 1,2-Dibromoethane(EDB) ND IF000500 <br /> 1 -Dichloroethane ND 000500 <br /> uoia Analytical -Petaluma *Refer to end of report for text of notes and definitions <br /> Page 14 of 22 <br />