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; Sequoia <br /> 1455 McDowell Blvd North, Ste D <br /> 61 Petaluma,CA 94954 <br /> (707) 792-1865 <br /> Analytical FAX(707) 792-0342 <br /> J <br /> uoia San Carlos Project Subbed in Sampled 4/8/99 <br /> 51 Industial Blvd Project Number L904098 Received 4/12/99 <br /> San Carlos,CA 94070 Project Manager Mike Gregory Reported 4/26/99 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical-Petaluma <br /> Batch Date Date Surrogate Reporting <br /> Analyte Number Prepared Analyzed Limits Limit Result Units 7 Notes* <br /> MW-1 P904301-01 Water <br /> Tert-amyl methyl ether 9040415 4/19/99 4/19/99 200 ND ug/l <br /> Tert-butyl alcohol „ 400 ND " <br /> Di-isopropyl ether 200 ND " <br /> 1,2-Dibromoethane(EDB) 100 ND " <br /> 1,2-Dichloroethane " " 100 ND " <br /> Ethanol 2000 ND " <br /> Ethyl tert-butyl ether 200 ND " <br /> Methyl tert-butyl ether _ 100 591 <br /> Surrogate Dibromofluoromethane 860-118 930 % <br /> Surrogate 12-Dichloroethane-d4 " " " 800-120 910 IF <br /> Surrogate Toluene-d8 880-110 920 of <br /> Surrogate 4-Bromofluorobenzene " " " 860-115 954 to <br /> MW-2 P904301-02 Water <br /> Tert-amyl methyl ether 9040415 4/19/99 4/19/99 100 ND ug/l <br /> Tert-butyl alcohol 200 ND " <br /> ,0sopropyl ether 1 00 ND " <br /> -,Dibromoethane(EDB) 0 500 ND <br /> "1,2-Dichloroethane 0 500 ND " <br /> Ethanol 100 ND " <br /> Ethyl tert-butyl ether too ND " <br /> Methyl tert-butyl ether 0 500 0 667 " <br /> Surrogate Dibromofluoromethane 860-118 912 % <br /> Surrogate 1,2-Dichloroethane-d4 800-120 872 " <br /> Surrogate Toluene-d8 880-110 904 <br /> Surrogate 4-Bromofluorobenzene to to " 860-115 930 to <br /> MW-3 P904301-03 Water <br /> Tert-amyl methyl ether 9040415 4/19/99 4/19/99 100 ND ug/1 <br /> Tert-butyl alcohol 200 ND " <br /> bi-isopropyl ether IF 11 too ND " <br /> 1,2-Dibromoethane(EDB) 11 to 0 500 ND " <br /> 1,2-Dichloroethane to 1. to 0 500 ND " <br /> Ethanol " 11 100 ND " <br /> Ethyl tert-butyl ether 1 00 ND " <br /> Methyl tert-butyl ether _ _ 0 500 230 " <br /> Surrogate Dibromofluoromethane it it86 0-118 948 <br /> Surrogate 12-Dichloroethane-d4 " of IF <br /> 800-120 952 to <br /> Surrogate Toluene-d8 It IF880-110 928 It <br /> Surrogate 4-Bromofluorobenzene to IF <br /> " 860-115 978 " <br /> 4iL oia Analytical-Petaluma *Refer to end of report for text of notes and definitions <br /> Page 2 of 5 <br />