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Violation Tracker Current Parent Company Summary

Current Parent Company Name: Mitsubishi Materials
Ownership Structure: publicly traded
Headquartered in: Japan
Major Industry: building materials
Specific Industry: cement
Penalty total since 2000: $631,528
Number of records: 36
Top 5 Offense Groups (Groups Defined)Penalty TotalNumber of Records
safety-related offenses$362,52822
environment-related offenses$269,00014
Top 5 Primary Offense TypesPenalty TotalNumber of Records
workplace safety or health violation$362,52822
environmental violation$269,00014
Notes: Parent-subsidiary linkages are based on relationships current as of the latest revision listed in the Update Log, which may vary from what was the case when a violation occurred. The penalty totals are adjusted to account for the fact that the individual entries below may include both agency records and settlement announcements for the same case; or else a penalty covering multiple locations may be listed in the individual records for each of the facilities. The totals are also adjusted to reflect cases in which federal and state or local agencies cooperated and issued separate announcements of the outcome. Duplicate or overlapping penalty amounts are marked with an asterisk in the list below.

Individual Penalty Records:

Click on the company or penalty amount for more information on each case.

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CompanyPrimary Offense TypeYearAgencyPenalty Amount sort icon
Robertson's Ready Mix Inc.environmental violation2008CA-SCAQMD$5,000
Mitsubishi Cement Corporationenvironmental violation2006CA-SCAQMD$5,000
Robertson's Ready Mix, L.P.environmental violation2004CA-SCAQMD$5,000
MITSUBISHI SILICON AMERICAenvironmental violation2000EPA$5,000
Mitsubishi Cement Corpworkplace safety or health violation2010MSHA$5,080
Mitsubishi Cement Corpworkplace safety or health violation2010MSHA$5,211
Mitsubishi Cement Corpworkplace safety or health violation2023MSHA$5,262
ROBERTSONS READY MIXworkplace safety or health violation2003OSHA$5,400
ROBERTSON'S READY MIXworkplace safety or health violation2015OSHA$5,655
Robertson's Ready Mix Inc.environmental violation2001CA-SCAQMD$7,000
Robertson's Ready Mixenvironmental violation2004CA-SCAQMD$8,000
Robertson's Ready Mixenvironmental violation2003CA-SCAQMD$8,000
ROBERTSONS READY MIXworkplace safety or health violation2001OSHA$8,225
Robertson's Ready Mixenvironmental violation2000CA-SCAQMD$9,000
ROBERTSON'S READY MIX HOLDINGS, LLCworkplace safety or health violation2017OSHA$11,020
Mitsubishi Polysiliconenvironmental violation2004AL-ENV$15,000
Mitsubishi Cement Corpworkplace safety or health violation2010MSHA$17,800
ROBERTSON'S READY MIX LIMITEDworkplace safety or health violation2000OSHA$18,000
ROBERTSONS READY MIXworkplace safety or health violation2006OSHA$18,000
MITSUBISHI CEMENTworkplace safety or health violation2006OSHA$18,000
ROBERTSONS READY MIX INCworkplace safety or health violation2012OSHA$18,000
ROBERTSON'S READY MIX INCworkplace safety or health violation2013OSHA$18,000
ROBERTSON'S TRANSPORT, LTDworkplace safety or health violation2022OSHA$18,000
ROBERTSON'S READY MIXworkplace safety or health violation2002OSHA$18,600
ROBERTSONS READY MIXworkplace safety or health violation2003OSHA$18,600
ROBERTSON'S READY MIX CONCRETEworkplace safety or health violation2001OSHA$18,750
Robertson's Transportworkplace safety or health violation2008MSHA$20,000
ROBERTSON'S READY MIX CONCRETEworkplace safety or health violation2003OSHA$21,300
MITSUBISHI CEMENT CORPORATIONworkplace safety or health violation2020OSHA$22,500
Mitsubishi Cement Corporationenvironmental violation2006CA-SCAQMD$22,800
Mitsubishi Cement Corporationenvironmental violation2005CA-SCAQMD$22,800
Robertson's Ready Mixenvironmental violation2019CA-SCAQMD$25,000
Mitsubishi Cement Corpworkplace safety or health violation2006MSHA$30,000
ROBERTSONS READY MIXworkplace safety or health violation2001OSHA$41,125
Robertson's Ready Mixenvironmental violation2009CA-ARB$65,700
Robertson's Ready Mixenvironmental violation2009CA-ARB$65,700
(*): Penalty amounts marked by an asterisk are ones announced by more than one agency. Parent penalty totals are adjusted to avoid double-counting.