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D Sequoia 1455 McDowell Blvd North Ste D <br /> Petaluma CA 94954 <br /> r (7o7) 792-1$65 <br /> Analytical <br /> FAX(707) 79Z-0342 <br /> is <br /> ATC Associates, Inc Project Ripon USD <br /> Sampled 7/15!99 <br /> 1117 Lone Palm Ave,Suite B Project Number 13099 0001 Received 7/20/99 <br /> Modesto,CA 95351 Project Manager Drew Van Allen Reported 8/6/99 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> ' Sequoia Analytical-Petaluma <br /> Batch Date Date Surrogate Reporting <br /> Analyte Number Prepared Analyzed Limns Limit Result Units Notes* <br /> RUSD-MW4-20 5 P907408-01 Soil <br /> Tert-amyl methyl ether 9070490 7123/99 7123/99 500 ND ug/kg <br /> Tert-butyl alcohol I00 ND " <br /> Di-isopropyl ether 5 00 ND <br /> 1,2-Dibromoethane(EDB) 5 00 ND " <br /> 1,2-Dichloroethane 500 ND " <br /> 'Ethanol 200 ND " <br /> Ethyl tert-butyl ether " " 500 ND <br /> Methyl tert-butyl ether 5 00 ND " <br /> Surrogate Drbromofluoromethane 800-120 970 / <br /> 'Surrogate 12-Dichloroethane-d4 " 800-120 902 <br /> Surrogate Toluene-d8 810-117 102 <br /> Surrogate 4-Bromofluorobenzene 740-121 990 <br /> MdIh&D-MW4-35 5 P907408-02 Soil <br /> INW-amyl methyl ether 9070490 7/23/99 7/23/99 5 00 ND ug/kg <br /> Tert-butyl alcohol 100 ND " <br /> Di-isopropyl ether 500 ND " <br /> 1,2-Dibromoethane(EDB) 5 00 ND " <br /> 1,2-Dichloroethane 5 00 ND " <br /> Ethanol 200 ND " <br /> Ethyl tert-butyl ether " 500 ND " <br /> Methyl tert-butyl ether 500 ND " <br /> Surrogate Dibromofluoromethane 800-120 898 <br /> Surrogate 12-Dichloroethane-d4 800-120 840 <br /> Surrogate Toluene-d8 810-117 92 0 <br /> Surrogate 4-Bromofluorobenzene " 740-121 888 " <br /> RUSD-MW5-20 5 P907408-03 Soil <br /> Tert-amyl methyl ether 9070490 7/23/99 7/23/99 500 ND ug/kg <br /> Tert-butyl alcohol 100 ND " <br /> Di-isopropyl ether 500 ND <br /> 1,2-Dibromoethane(EDB) " " 5 00 ND <br /> 1,2-Dichloroethane 500 ND <br /> Ethanol 200 ND " <br />'Ethyl tert-butyl ether 5 00 ND " <br /> Methyl tert-butyl ether 500 ND " <br /> Surrogate Drbromofluoromethane 800-120 916 <br /> Surrogate 1,2-Dichloroethane-d4 800-120 862 <br /> Surrogate Toluene-d8 810-117 94 6 <br /> Surrogate 4-Bromofluorobenzene 740-121 928 <br /> Sequoia Analytical-Petaluma *Refer to end of report for text of notes and definitions <br /> Page 4 of 9 <br />