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1455 McDowell Blvd North Ste b <br /> Sequoia Petaluma CA 94954 <br /> (707) 792-1865 <br /> Analytical FAX(707) 792-0342 <br /> Sequoia San Carlos Project Subbedin Sampled 4/22/99 <br /> 1551 Industial Blvd Project Number L904337 Received 4/28/99 <br /> San Carlos,CA 94070 Pro ect Manager Mike Gregory Reported 5/6/99 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical-Petaluma <br /> Batch Date Date Surrogate Reporting <br /> IA.nalyte Number Prepared Analyzed Limits Limit Result Units Notes* <br /> EW-1 P904776-04 Water <br /> Tert-amyl methyl ether 9050079 5/4/99 515199 l00 ND ug/I <br /> Tert-butyl alcohol 2000 ND <br /> Di-isopropyl ether 100 ND " <br /> 1,2-Dibromoethane(EDB) 500 ND " <br /> 1,2-Dtchloroethane 500 ND <br /> Ethanol 10000 ND " <br /> Ethyl tert-butyl ether 100 ND " <br /> Methyl tert-butyl ether 500 4520 <br /> Surrogate Dibromofluoromethane 860-118 105 % <br /> Surrogate 1 2-Dtchloroethane-d4 to 11 1. 800-120 112 11 <br /> Surrogate Toluene-d8 11 toto 880-110 974 " <br /> Surrogate 4-Bromofluorobenzene 860-115 102 " <br /> EW-2 P904776-05 Water <br /> Tert-amyl methyl ether 9050079 5/4199 515/99 1 00 ND ug/l <br /> Tert-butyl alcohol " 200 ND " <br /> Di-isopropyl ether " 100 ND " <br /> 1,2-Dibromoethane(EDB) 110 500 ND " <br /> 1;2-Dtchloroethane " 0 500-ND..- <br /> Ethanol <br /> 00 NDEthanol 100 ND " <br /> Ethyl tert-butyl ether 100 ND " <br /> Methyl tent-butyl ether _ _ 0_500 0537 <br /> Surrogate Dibromofluoromethane` 860-118 104 % <br /> Surrogate 12-Dtchloroethane-d4 to 11800-120 115 <br /> Surrogate Toluene-d8 880-110 946 11 <br /> Surrogate 4-Bromofluorobenzene " " " 860-115 106 to <br /> Sequoia Analytical-Petaluma *Refer to end of report for text of notes and defintlto <br /> Page 3 of 6 <br />