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F F 690 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650)364-9233 <br /> E <br /> Sequoia 404 N Wiget 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 /> Cyt f►J 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> ISequoia-RC(Subbed]n) Project Kayvon Kimyai Sampled 2/23/99 to 2/25/99 <br /> 680 Chesapeake Dr Project Number 9902E24/E25 Received 313199 <br /> Redwood City,CA 94063 Project Manager Ka an Kimyai Reported 3112199 <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 /> Matrix Spike 9020605-MS1 P902433-01 — <br /> Methyl tert-butyl ether 2127199 00500 ND 00501 mg/kg 700-130 100 <br /> Surrogate Dibromofluoromethane to 00500 00476 11 800-120 952 <br /> Surrogate 1,2-Dichloroethane-d4 00500 00523 oo800-120 105 <br /> Surrogate Toluene-d8 1100500 00416 if 810-117 832 <br /> Surrogate 4-Bromofluorobenzene 1100500 00448 to 740-121 896 <br /> IMatrix Spike Dun 9020605-MSD1 P902433-01 —�— <br /> Methyl tert-butyl ether 2/27/99 00500 ND 00508 mg/kg 700-130 102 200 198 <br /> Surrogate Dibromofluoromethane 00500 00522 800-120 104 <br /> Surrogate 1 2-Dichloroethane-d4 00500 00559 800-120 112 <br /> Surrogate Toluene-d8 00500 00474 810-117 948 <br /> Surrogate 4-Bromofluorobenzene 00500 00510 740-121 102 <br /> Cch9020614 Date Prepared 2127199 Extraction Method EPA 5030 waters <br /> 9020614-BLKI <br /> yl methyl ether 2127199 ND ug/l 100 <br /> Tert-butyl alcohol " ND 200 <br /> Di-isopropyl ether " ND 100 <br /> 1,2-Dibromoethane(EDB) ND 0 500 <br /> 1,2-Dichloroethane ND 0 500 <br /> Ethanol ND 100 <br /> IEthyl tert-butyl ether ND 100 -- <br /> Methyl tert-butyl ether ND 100 <br /> Surrogate Dibromofluoromethane to500 488 860-118 976 <br /> Surrogate 12-Dichloroethane-d4 If 500 5 22 of800-120 104 <br /> Surrogate Toluene-d8 Soo 4 91 0 880-110 98 2 <br /> Surrogate 4-Bromofluorobenzene 500 4 70 860-115 940 <br /> IBlank 9020614-BLK2 <br /> Tert-amyl methyl ether 311199 ND Ug/1 100 <br /> Tert-butyl alcohol ND 200 <br /> Di-isopropyl ether ND 100 <br /> 1,2-Dibromoethane(EDB) ND 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 100 <br /> Surrogate Dibromofluoromethane 500 4 77 860-118 954 <br /> Surrogate 12-Dichloroethane-d4 500 4 95 IF 800-120 990 <br /> I Surrogate Toluene-d8 500 4 79 to880-110 95 8 <br /> rrogate 4-Bromofluorobenzene 500 4 78 to 860-115 956 <br /> 19muoia Analytical-Petaluma *Refer to end of report for text of nates and definitions <br />' Page 12 of 22 <br />