General Information Party ID Party Name Party Classification Mailing Address Work Phone Email/Website 31208 National Cement Company Privately-Owned Business 15821 Ventera Boulevard 435 Encino, CA 91436 null null Related Places Place ID Place Name County Region Place Type Relationship to Party Relationship Start Date Relationship End Date 248645 Plant GW Treatment System - National Cement Kern 6B Concrete Manufacturing Owner 10/26/2000 null 243901 National Cement Old Ind LF Kern 6B Facility Owner 05/13/1993 null 236769 Lebec Cement Plant Kern 6B Sand and Gravel Mining Operator 10/26/2000 null Related Parties Party ID Party Name Party Type Role/Relationship Relationship Start Date Relationship End Date Classification 109433 John Heiser Person Facility Contact 10/26/2000 null null 108325 Jerry Stefanik Person Facility Contact 10/26/2000 null null 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 445491 Enrollee - NPDES 6V 6B150009004 Enrollee - NPDES for National Cement Company Active NPDNONMUNIPRCS R6T-2016-0011 01/07/2021 null Discharger 01/07/2021 null 374383 Enrollee 6V 6B150009004 R6T-2010-0024-001 Plant GW Treatment System- National Cement Historical NPDNONMUNIPRCS R6T-2010-0024 08/12/2011 01/07/2021 Discharger 06/16/2004 null 203938 Enrollee 6V 6B159007001 6B159007001 Historical LNDISPOTH R6T-2004-0025 03/14/1991 06/10/2003 Discharger 09/01/2005 null 203936 Enrollee 6V 6B150009004 6B150009004 - National Cement, Lebec Historical NPDNONMUNIPRCS 98-075 12/26/2001 11/06/2003 Discharger 09/01/2005 null 147798 NPDES Permit 6V 6B159301001 NPDES 00-011 for NATIONAL CEMENT CO Historical NPDESWW 00-011 03/09/2000 03/09/2005 Discharger 03/09/2000 null 147646 WDR 6V 6B159007001 CDO Rescission Order No. 00-037 for NATIONAL CEMENT CO Historical LNDISPOTH 6-00-37 05/10/2000 05/10/2000 Discharger 05/10/2000 null 147597 WDR 6V 6B159007001 WDR 97-098 for NATIONAL CEMENT CO Historical LNDISPOTH 97-098 10/09/1997 05/10/2000 Discharger 10/09/1997 null 147557 WDR 6V 6B159007001 CLOSURE & POST-CLOSURE OF NATIONAL CEMENT PLANT Historical LNDISPOTH 00-035 05/10/2000 06/11/2003 Discharger 05/10/2000 null 146154 NPDES Permit 6V 6B159301001 NPDES 93-041 for NATIONAL CEMENT CO Historical NPDESWW 93-041 05/13/1993 03/09/2000 Discharger 05/13/1993 null 145890 WDR 6V 6B159007001 WDR 91-019A1 for NATIONAL CEMENT CO Historical LNDISPOTH 91-019A1 04/20/1995 10/09/1997 Discharger 04/20/1995 null 145889 WDR 6V 6B159007001 WDR 91-019 for NATIONAL CEMENT CO Historical LNDISPOTH 91-019 03/14/1991 10/09/1997 Discharger 03/14/1991 null 132807 WDR 6V 6B159007001 CLOSURE & POST-CLOSURE OF NATIONAL CEMENT PLANT Active LNDISPOTH 03-025 06/11/2003 null Discharger 06/11/2003 null 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. 1136465 11/21/2024 Late Report Report 2 30-day periods late Violation N Report Plant GW Treatment System - National Cement 445491 R6T-2016-0011 Y 1136463 11/21/2024 Late Report Report 5 30-day period late Violation N Report Plant GW Treatment System - National Cement 445491 R6T-2016-0011 Y 1136458 11/21/2024 Late Report Report 8 30-day period late Violation N Report Plant GW Treatment System - National Cement 445491 R6T-2016-0011 Y 1136451 11/21/2024 Late Report Report 12 30-day periods late Violation N Report Plant GW Treatment System - National Cement 445491 R6T-2016-0011 Y 1136447 11/21/2024 Late Report Report 15 30-day periods late Violation N Report Plant GW Treatment System - National Cement 445491 R6T-2016-0011 Y 1136440 11/21/2024 Late Report Report 18 30-day periods late Violation N Report Plant GW Treatment System - National Cement 445491 R6T-2016-0011 Y 1136437 11/21/2024 Late Report Report 22 30-day periods late as of 11/21/2024 Violation N Report Plant GW Treatment System - National Cement 445491 R6T-2016-0011 Y 1136436 11/21/2024 Late Report Report 25 30-day periods late as of 11/21/2024 Violation N Report Plant GW Treatment System - National Cement 445491 R6T-2016-0011 Y 1136435 11/21/2024 Late Report Report 28 30-day periods late as of 11/21/2024 Violation N Report Plant GW Treatment System - National Cement 445491 R6T-2016-0011 Y 1136420 11/21/2024 Late Report Late for 31 30-day periods as of 11/21/2024 Violation N Report Plant GW Treatment System - National Cement 445491 R6T-2016-0011 Y 1136180 09/30/2024 CAT2 Arsenic, Total Recoverable Monthly Maximum limit is 10.0 ug/L and reported value was 13 ug/L. Violation null Report Plant GW Treatment System - National Cement 445491 R6T-2016-0011 Y 1136179 09/30/2024 CAT2 Arsenic, Total Recoverable Monthly Maximum limit is 10.0 ug/L and reported value was 12.0 ug/L. Violation null Report Plant GW Treatment System - National Cement 445491 R6T-2016-0011 Y 1136178 06/30/2024 CAT2 Arsenic, Total Recoverable Monthly Maximum limit is 10.0 ug/L and reported value was 12.001 ug/L. Violation null Report Plant GW Treatment System - National Cement 445491 R6T-2016-0011 Y 1136177 06/30/2024 CAT2 Arsenic, Total Recoverable Monthly Maximum limit is 10 ug/L and reported value was 12 ug/L. Violation null Report Plant GW Treatment System - National Cement 445491 R6T-2016-0011 Y 1136176 03/31/2024 CAT2 Arsenic, Total Recoverable Monthly Maximum limit is 10 ug/L and reported value was 12 ug/L. Violation null Report Plant GW Treatment System - National Cement 445491 R6T-2016-0011 Y 1136174 03/31/2024 CAT2 Tetrachloroethene Monthly Maximum limit is 0.5 ug/L and reported value was 1.41 ug/L. Violation null Report Plant GW Treatment System - National Cement 445491 R6T-2016-0011 Y 1136173 03/31/2024 CAT2 Arsenic, Total Recoverable Monthly Maximum limit is 10 ug/L and reported value was 12 ug/L. Violation null Report Plant GW Treatment System - National Cement 445491 R6T-2016-0011 Y 1136172 03/31/2024 CAT2 Tetrachloroethene Monthly Maximum limit is 0.5 ug/L and reported value was 1.4 ug/L. Violation null Report Plant GW Treatment System - National Cement 445491 R6T-2016-0011 Y Enforcement Actions Enforcement ID Enforcement Type Enf. Order No. Title Program Effective Date Status 459751 Notice of Violation null NOV 01/17/2025 for Tejon Ranchcorp NPDNONMUNIPRCS 01/17/2025 Active 383964 Oral Communication null Oral Com 03/21/2012 for Lafarge North America Inc NPDNONMUNIPRCS 03/21/2012 Historical 375805 Staff Enforcement Letter null SEL 09/08/2010 for NATIONAL CEMENT CO NPDNONMUNIPRCS 09/08/2010 Historical 254772 Oral Communication UNKNOWN Enforcement - 6B150009004 NPDNONMUNIPRCS 03/03/2004 Historical 253017 Staff Enforcement Letter UNKNOWN Enforcement - 6B159007001 LNDISPOTH 06/16/2004 Historical 252974 Staff Enforcement Letter UNKNOWN Enforcement - 6B150009004 NPDNONMUNIPRCS 06/16/2004 Historical 244340 Clean-up and Abatement Order 6-90-059A4 Enforcement - 6B159007001 LNDISPOTH 09/01/2000 Historical 223378 Clean-up and Abatement Order 90-059A1 Enforcement - 6B159007N01 UNREGS 12/30/1996 Historical 223167 Clean-up and Abatement Order 97-099 Enforcement - 6B159007001 LNDISPOTH 10/09/1997 Historical 223147 Cease and Desist Order 97-100 CDO 6-97-100 for National Cement Company Lebec Cement Plant LNDISPOTH 10/09/1997 Historical 223140 Clean-up and Abatement Order 90-059A2 Enforcement - 6B159007N01 UNREGS 11/04/1998 Historical 219475 Clean-up and Abatement Order 90-059 Enforcement - 6B159007N01 UNREGS 10/09/1990 Historical Regulatory Measures linked to Related Parties Reg. Measure ID Organization Regulatory Measure Type Program Effective Date Status