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680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> ' Sequoia 404 N Wiget Lane Walnut Creek,CA 94598 (925)988-%00 FAX(925)988-9673 <br /> ,..� Analytical819 Striker Avenue Suite 8 Sacramento CA 95834 (916)911-9600 FAX(916)921-0100 <br /> Le1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Sequoia-RC(Subbed in) Project Kayvon Kimyw 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 Kayvan Kimyai Reported 3/12199 <br /> IVolatile Organic Compounds by EPA Method 8260B/Quality Control <br /> Sequoia Analytical-Petaluma <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Limits % Limit % Notes <br /> LCS(continued) 9030118-BS3 <br /> Surrogate 4-Bromofluorobenzene 319/99 00500 00515 mg/kg 740-121 103 <br /> LCS 9030118-BS4 — <br /> _Methyl tert-butyl ether 3111/99 00500 00446 mg/kg 700-130 89 2 <br /> Surrogate Dibromolluoromethane It 00500 00520 800-120 104 <br /> Surrogate 12-Dechloroethane-d4 to00500 00563 IT 800-120 113 <br /> ISurrogate Toluene-d8 00500 00436 11810-117 872 <br /> Surrogate 4-Bromofluorobenzene 00500 00503 of 740-121 101 <br /> Matnx Spike 9030118-MS1 P902601-40 <br /> IMethyl tert-butyl ether 3/4/99 00500 ND 00489 mg/kg 700-130 978 <br /> Surrogate Dibromofluoromethane It 00500 00489 1, 800-120 978 <br /> Surrogate 12-Dechloroethane-d4 to 00500 00421 It 800-120 842 <br /> ogate Toluene-d8 0 0500 00467 810-117 93 4 <br /> gate 4-Bromofluorobenzene 00500 00553 740-121 111 <br /> Matrix Spike Do p 9030118-MSD1 P90260140 <br /> Methyl tert-butyl ether 314199 00500 ND 00590 mg/kg 700-130 118 200 187 <br /> Surrogate Dibromofluoromethane 00500 00593 " 800-120 119 <br /> Surrogate 12-Dechloroethane-d4 It 00500 00666 " 800-120 133 <br /> Surrogate Toluene-d8 00500 00511 810-117 102 <br /> Surrogate 4-Bromofluorobenzene 00500 00605 740-121 121 1 <br /> Batch 9030174 Date Prepared 316199_ Extraction Method EPA 5030 soils McOH <br /> Blank 9030174-BLK1 <br /> Tert-amyl methyl ether 3/9/99 ND mg/kg 100 <br /> Tert-butyl alcohol ND 200 <br /> Dl-isopropyl ether ND 100 <br /> I1,2-Dibromoethane(EDB) ND 100 <br /> 1,2-Dichloroethane ND 100 <br /> Ethanol ND 400 <br /> Ethyl tert-butyl ether ND 100 <br /> Methyl tert-butyl ether ND 100 <br /> Surrogate Dtbromofluoromethane 200 197 800-120 985 <br /> Surrogate 1,2-Dechloroethane-d4 it 200 2 03 IF 800-120 101 <br /> ISurrogate Toluene-d8 If200 2 03 If810-117 101 <br /> Surrogate 4-Bromofluorobenzene If200 200 If 740-121 100 <br /> Blank 9030174-BLK2 , <br /> Tert-amyl methyl ether 3110199 ND mg/kg 100 <br /> -butyl alcohol ND 200 <br /> 1 <br /> ISequoia Analytical-Petaluma *Refer to end of report for text of notes and definitions <br /> Page 16 of 22 <br /> a <br />