General Information
Party ID	Party Name	Party Classification	Mailing Address	Work Phone	Email/Website
648867	David Sheffield	null	16013 E Foothill Blvd Irwindale, CA 91702	424-318-0939	sheffieldd@vmcmail.com	

Related Places
Place ID	Place Name	County	Region	Place Type	Relationship to Party	Relationship Start Date	Relationship End Date

Related Parties
Party ID	Party Name	Party Type	Role/Relationship	Relationship Start Date	Relationship End Date	Classification
7514	Calmat Company	Organization	Legally Responsible Official	05/16/2025	null	Privately-Owned Business	

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

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

Regulatory Measures linked to Related Parties
Reg. Measure ID	Organization	Regulatory Measure Type	Program	Effective Date	Status
419656	Calmat Company	Enrollee - NPDES	NPDMINING	06/01/2018	Active	
397420	Calmat Company	401 Certification	CERFILLEXC	08/29/2017	Active	
383445	Calmat Company	NPDES Permit	NPDMINING	07/26/2013	Historical	
373853	Calmat Company	Letter	NPDMINING	12/02/2009	Historical	
330623	Calmat Company	NPDES Permit	NPDMINING	08/11/2007	Historical	
147816	Calmat Company	NPDES Permit	NPDMINING	01/28/2000	Historical	
145864	Calmat Company	NPDES Permit	NPDMINING	06/24/1994	Historical	
143756	Calmat Company	NPDES Permit	NPDMINING	12/05/1980	Historical	
144938	Calmat Company	NPDES Permit	NPDMINING	08/24/1979	Historical	
143884	Calmat Company	NPDES Permit	NPDMINING	07/26/1974	Historical