General Information Party ID Party Name Party Classification Mailing Address Work Phone Email/Website 7277 Calaveras Materials Inc Privately-Owned Business 114 East Shaw Avenue Suite 100 Fresno, CA 93710 559-277-7060 null Related Places Place ID Place Name County Region Place Type Relationship to Party Relationship Start Date Relationship End Date 791771 Sanger Aggregates Fresno 5F Sand and Gravel Mining Owner and Operator 02/19/2013 09/24/2023 271715 Warner Gravel Pit Stanislaus 5S Facility Owner 05/11/1998 null 252852 Merced Aggregates Merced 5F Sand and Gravel Mining Owner 06/28/1985 12/13/2023 230809 Hughson Aggregates Stanislaus 5S Sand and Gravel Mining Owner 04/12/2001 12/13/2023 209738 Calaveras Materials Blackstone Plant Fresno 5F Facility Owner 11/28/1984 null Related Parties Party ID Party Name Party Type Role/Relationship Relationship Start Date Relationship End Date Classification 538737 Stuart Mager Person Employee 02/19/2013 null null 538736 Burton Gilpin Person Legally Responsible Official 02/19/2013 null null 493123 Greg Wood Person Board member 12/04/2008 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 441734 Individual Monitoring Requirem 5F null Ind MRP R5-2020-0830 for Martin Marietta Northern California Aggregates, LLC Active WDRMINING R5-2020-0830 01/01/2021 null Discharger 12/28/2020 09/24/2023 194947 Enrollee 5S 5C507001001 5C507001001 Historical NPDNONMUNIPRCS 93-230 05/19/1998 06/16/2000 Discharger 09/01/2005 null 144386 WDR 5F 5C202006001 WDR 90-082 for CALAVERAS MATERIALS, INC Historical WDRINDIVLRG 90-082 03/23/1990 03/16/2005 Discharger 03/23/1990 null 144210 WDR 5F 5C242000001 WDR 85-166 for Martin Marietta Northern California Aggregates, LLC, Merced Aggregates Active WDRMINING 85-166 06/28/1985 null Discharger 06/28/1985 12/13/2023 144113 WDR 5F 5C202006001 WDR 84-140 for CALAVERAS MATERIALS, INC Historical WDRINDIVLRG 84-140 11/28/1984 03/23/1990 Discharger 11/28/1984 null 141718 NPDES Permit 5S 5C502000002 NPDES 94-089 for CALAVERAS MATERIALS, INC. Historical NPDMINING 94-089 04/22/1994 12/06/2001 Discharger 04/22/1994 null 131413 WDR 5S 5B50NC00007 WDR R5-2002-0227 for Martin Marietta Southern California Aggregates, LLC - Hughson Aggregates Active WDRMINING R5-2002-0227 12/06/2002 null Discharger 12/06/2002 12/13/2023 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 399646 Oral Communication null Oral Com for Calaveras Materials Inc WDRMINING 01/30/2015 Historical 398159 Notice of Violation null NOV 09/04/2014 for Calaveras Materials Inc WDRMINING 09/04/2014 Historical 388254 Oral Communication null Oral Com 12/05/2012 for Calaveras Materials Inc. (Dan Larson) WDR 11/30/2012 Historical 379751 Notice of Violation null NOV 07/07/2011 for Calaveras Materials Inc WDR 07/07/2011 Historical 255202 Staff Enforcement Letter null SEL 03/22/2000 for Calaveras Materials, River Rock Plant WDR 03/22/2000 Historical 255201 Staff Enforcement Letter null SEL 03/22/2000 for Calaveras Materials, Blackstone Plant WDRINDIVLRG 03/22/2000 Historical Regulatory Measures linked to Related Parties Reg. Measure ID Organization Regulatory Measure Type Program Effective Date Status