General Information Party ID Party Name Party Classification Mailing Address Work Phone Email/Website 33183 Oregon Steel Mills Privately-Owned Business 1025 Kaiser Road Napa, CA 94558-6257 707-257-5000(+) gilpina@osm.com Related Places Place ID Place Name County Region Place Type Relationship to Party Relationship Start Date Relationship End Date 244839 Napa Pipe - SLIC/SUB15 Napa 2 Manufacturing NEC Owner 04/15/1992 01/21/2006 244838 Napa Pipe - SUB15/TANKS Napa 2 Manufacturing NEC Owner 05/17/1989 null 243853 Napa Fabricating Plant Napa 2 Manufacturing NEC Owner 06/15/1995 null Related Parties Party ID Party Name Party Type Role/Relationship Relationship Start Date Relationship End Date Classification Regulatory Measures(non-enforcement) Reg. Measure ID Regulatory Measure Type Region WDID Title Status Program Order No. RM Effective Date RM Termination Date Relationship Relationship Start Date Relationship End Date 259516 Letter 2 null 2 283007001-LT970711 Historical NPDESWW LT970711 null null Discharger 07/11/1997 null 259515 Letter 2 null 2 283007001-LT970515 Historical NPDESWW LT970515 null null Discharger 05/15/1997 null 145245 WDR 2 2 283007001 NPDES 79-155 for OREGON STEEL MILLS Historical NPDESWW 79-155 11/20/1979 null Discharger 11/20/1979 null 142291 WDR 2 2 283007003 WDR 92-035 for NAPA PIPE CORPORATION - CLASS II WMU Historical LNDISP 92-035 04/15/1992 01/19/1995 Discharger 04/15/1992 null 142117 WDR 2 2 283007002 WDR 89-070 for NAPA PIPE CORPORATION, Napa Pipe Fabricating Plant Historical LNDISP 89-070 05/17/1989 04/20/2005 Discharger 05/17/1989 null 142081 WDR 2 2 283007003 WDR 95-011 for NAPA PIPE CORPORATION - CLASS II WMU Historical LNDISP 95-011 01/18/1995 04/20/2005 Discharger 01/18/1995 null 141869 WDR 2 2 283007001 NPDES 90-154 for OREGON STEEL MILLS Historical NPDESWW 90-154 12/12/1990 null Discharger 12/12/1990 null 133348 WDR 2 2 283007003 WDR 05-012 for the Napa Pipe Manufacturing Facility Active LFNONOPER R2-2005-0012 04/20/2005 null Discharger 04/20/2005 01/21/2006 Violations within the past calendar year Violation ID Occurrence Date Violation Type Violation Description Violation Status Priority Source Facility Name Violated Reg. Meas. ID Violated Reg. Meas. Order No. Linked To Enf. Enforcement Actions Enforcement ID Enforcement Type Enf. Order No. Title Program Effective Date Status 237289 13267 Letter UNKNOWN Enforcement - 2 28-0108 UST 04/22/1999 Historical 219937 Clean-up and Abatement Order 90-147 Enforcement - 2 283007002 LNDISP 11/14/1990 Active 169253 Clean-up and Abatement Order 90-147 SCR 90-147 for the Napa Pipe Facility SLIC 11/14/1990 Active Regulatory Measures linked to Related Parties Reg. Measure ID Organization Regulatory Measure Type Program Effective Date Status