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   Party At-A-Glance Report

  
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General Information
Party ID Party Name Party Classification Mailing Address Work Phone Email/Website
48117 US Borax Inc Privately-Owned Business 14486 Borax Road Boron, CA 93516 760-762-7222(+) richard.cohen@riotinto.com
  
  
  
  
Expand/Contract Related Places
Related Places
Place ID Place Name County Region Place Type Relationship to Party Relationship Start Date Relationship End Date
857400 Lang Mine Los Angeles 4 Salt Mining Owner and Operator 04/02/2019 None
246358 Owens Lake Trona Processing Inyo 6B Salt Mining Owner 01/22/2003 None
226707 Gangue/Overburden/Ref Waste Kern 6B Salt Mining Owner 11/28/1994 None
210080 Boron Mine Facility Kern 6B Salt Mining Owner 06/24/1976 None
Total Related Places: 4
  
  
  
  
Expand/Contract Related Parties
Related Parties
Party ID Party Name Party Type Role/Relationship Relationship Start Date Relationship End Date Classification
605985 Richard Cohen Person Legally Responsible Official 01/21/2020 None None
596367 Nathan Francis Person Legally Responsible Official 04/02/2019 01/21/2020 None
Total Related Parties: 2
  
  
  
  
Expand/Contract Regulatory Measures
Regulatory Measures (non-enforcement)
Reg. Measure ID Regulatory Measure Type Region WDID Status Program Order No. RM Effective Date RM Termination Date Relationship Relationship Start Date Relationship End Date Amended?
429730 13267 Letter (Non-Enforcement) 4 None Historical LFNONOPER R4-2019-0012 03/29/2019 07/21/2020 Discharger 04/02/2019 None N
403003 WDR 6V 6B152004001 Active LNDISPOTH R6V-2015-0057 09/17/2015 None Discharger 09/17/2015 None Y
376452 WDR 6V 6B152004002 Active LNDISPOTH R6V-2010-0048 10/14/2010 None Discharger 04/13/1989 None N
306715 WDR 6V 6B152004001 Historical LNDISPOTH R6V-2006-0025 06/14/2006 09/17/2015 Discharger 04/11/2001 None Y
148008 WDR 6V 6B152004001 Historical LNDISP 01-019 04/11/2001 04/11/2006 Discharger 04/11/2001 None N
147899 WDR 6V 6B152004001 Historical LNDISP 80-025 03/13/1980 None Discharger 03/13/1980 None N
147882 WDR 6V 6B152004001 Historical LNDISP 78-075 12/07/1978 None Discharger 12/07/1978 None N
147859 WDR 6V 6B152004001 Historical LNDISP 76-070 06/24/1976 None Discharger 06/24/1976 None N
147194 WDR 6V 6B152004001 Historical LNDISP 84-014 01/12/1984 None Discharger 01/12/1984 None N
147168 WDR 6V 6B152004001 Historical LNDISP 90-037 05/10/1990 None Discharger 05/10/1990 None N
146444 WDR 6V 6B152004001 Historical LNDISP 89-078 04/13/1989 None Discharger 04/13/1989 None N
146443 WDR 6V 6B152004002 Historical LNDISP 89-059 04/13/1989 10/14/2010 Discharger 04/13/1989 None Y
146150 WDR 6V 6B152004001 Historical LNDISP 93-017 03/11/1993 04/10/2001 Discharger 03/11/1993 None Y
132919 WDR 6V 6B140202001 Active LNDISPOTH 04-035 09/09/2004 None Discharger 09/09/2004 None N
Total Regulatory Measures: 14
  
  
  
  
Expand/Contract Violations
Violations within the past five years
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.
1147628 12/31/2024 Order Conditions Wells GWM-37, GWM-78, GWM-81, GWM-82, GWM-105, GWM-106, GWM-111, GWM-113 were dr Violation N Report Boron Mine Facility 403003 R6V-2015-0057 Y
1147627 06/30/2024 Order Conditions Wells GWM-37, GWM-78, GWM-81, GWM-82, GWM-105, GWM-106, GWM-111, GWM-113 were dr Violation N Report Boron Mine Facility 403003 R6V-2015-0057 Y
1147626 12/31/2023 Order Conditions Wells GWM-37, GWM-78, GWM-81, GWM-82, GWM-105, GWM-106, GWM-111, GWM-113 were dr Violation N Report Boron Mine Facility 403003 R6V-2015-0057 Y
1147625 06/30/2023 Order Conditions Wells GWM-37, GWM-78, GWM-81, GWM-82, GWM-105, GWM-106, GWM-111, GWM-113 were dr Violation N Report Boron Mine Facility 403003 R6V-2015-0057 Y
1147622 12/31/2022 Order Conditions Wells GWM-37, GWM-78, GWM-81, GWM-82, GWM-105, GWM-106, GWM-111, GWM-113 were dr Violation N Report Boron Mine Facility 403003 R6V-2015-0057 Y
1147621 06/30/2022 Order Conditions Wells GWM-37, GWM-78, GWM-81, GWM-82, GWM-105, GWM-106, GWM-111, GWM-113 were dr Violation N Report Boron Mine Facility 403003 R6V-2015-0057 Y
1147620 12/31/2021 Order Conditions Wells GWM-37, GWM-78, GWM-81, GWM-82, GWM-105, GWM-106, GWM-111, GWM-113 were dr Violation N Report Boron Mine Facility 403003 R6V-2015-0057 Y
1147619 06/30/2021 Order Conditions Wells GWM-37, GWM-78, GWM-81, GWM-82, GWM-105, GWM-106, GWM-111, GWM-113 were dr Violation N Report Boron Mine Facility 403003 R6V-2015-0057 Y
1147460 06/30/2025 Order Conditions Wells GWM-37, GWM-78, GWM-81, GWM-82, GWM-105, GWM-106, GWM-111, GWM-113 were dr Violation N Report Boron Mine Facility 403003 R6V-2015-0057 Y
1147459 06/30/2025 Deficient Reporting (1) LCRS Average Daily Flow rates are not reported in the 2025 1st half monitori Violation N Report Boron Mine Facility 403003 R6V-2015-0057 Y
1147458 01/01/2025 Deficient Monitoring (1) Surface impoundment action leakage rates exceeded. Violates Board Order R6V- Violation N Report Boron Mine Facility 403003 R6V-2015-0057 N
1147457 05/21/2025 Groundwater Exceeded the control limit of Antimony, Bicarbonate Alkalinity (as CaCO3), Calci Violation N Report Boron Mine Facility 403003 R6V-2015-0057 N
1147456 12/31/2024 Deficient Reporting (1) LCRS Average Daily Flow rates are not reported in the 2024 2nd half monitori Violation N Report Boron Mine Facility 403003 R6V-2015-0057 Y
1147455 07/01/2024 Deficient Monitoring (1) Surface impoundment action leakage rates exceeded. Violates Board Order R6V- Violation N Report Boron Mine Facility 403003 R6V-2015-0057 N
1147454 09/18/2024 Groundwater (1) Exceeded the statistical control limit of Chloride, Dissolved Calcium, Disso Violation N Report Boron Mine Facility 403003 R6V-2015-0057 N
1141543 01/26/2025 Order Conditions Board Order No. R6V-2015-0057, Section IV. B., Standard Provisions, The Discharg Violation N Inspection Boron Mine Facility 403003 R6V-2015-0057 Y
1141542 01/26/2025 Order Conditions MRP, Section II.A.4.a.ii states ¿Upon detection of leachate in a previously dry Violation N Inspection Boron Mine Facility 403003 R6V-2015-0057 Y
1141541 01/26/2025 Order Conditions 1. Board Order No. R6V-2015-0057, Section IV. B., Standard Provisions, The Disch Violation N Inspection Boron Mine Facility 403003 R6V-2015-0057 Y
1140139 04/09/2024 Groundwater Exceeded the CUSUM limit of Boron, Carbonate Alkalinity as CACO3, Chloroform, an Violation N Report Boron Mine Facility 403003 R6V-2015-0057 N
1140138 02/28/2024 Deficient Monitoring (1) Unsaturated zone soil moisture exceeded upper tolerance limits. Violates Boa Violation N Report Boron Mine Facility 403003 R6V-2015-0057 N
1140137 06/30/2024 Order Conditions (1) Failure to maintain groundwater well 3M-71 during the 1st half 2024 monitori Violation N Report Boron Mine Facility 403003 R6V-2015-0057 N
1140136 03/06/2023 Deficient Monitoring Unsaturated zone soil moisture exceeded upper tolerance limits. Violates Board O Violation N Report Boron Mine Facility 403003 R6V-2015-0057 N
1140135 03/27/2023 Groundwater Exceeded the CUSUM limit of Antimony, Carbonate Alkalinity as CACO3, Chloroform, Violation N Report Boron Mine Facility 403003 R6V-2015-0057 N
1140134 06/30/2023 Order Conditions (1) Failure to maintain groundwater well 3M-71 during the 1st half 2023 monitori Violation N Report Boron Mine Facility 403003 R6V-2015-0057 N
1140133 01/31/2023 Deficient Monitoring (1) List of all monitoring pairs that have exhibited a verified measurably signi Violation N Report Boron Mine Facility 403003 R6V-2015-0057 N
1140132 09/20/2023 Deficient Monitoring (1) Unsaturated zone soil moisture exceeded upper tolerance limits. Violates Boa Violation N Report Boron Mine Facility 403003 R6V-2015-0057 N
1140129 08/03/2023 Groundwater Exceeded the CUSUM limit of Arsenic and Chloroform during the 2nd half 2023 moni Violation N Report Boron Mine Facility 403003 R6V-2015-0057 N
1140128 12/31/2023 Order Conditions (1) Failure to maintain groundwater well 3M-71 during the 2nd half 2023 monitori Violation N Report Boron Mine Facility 403003 R6V-2015-0057 N
1115556 09/13/2022 Deficient Monitoring Unsaturated zone moisture exceeded upper tolerance limits. Field verification te Violation N Report Boron Mine Facility 403003 R6V-2015-0057 Y
1115555 07/31/2022 Order Conditions Surface impoundment action leakage rates exceeded. Violates Board Order R6V-2015 Violation N Report Boron Mine Facility 403003 R6V-2015-0057 Y
1115554 12/31/2022 Deficient Monitoring (1) Wastewater sample was not analyzed for annual constituents of concern in Att Violation N Report Boron Mine Facility 403003 R6V-2015-0057 Y
1115553 12/31/2022 Deficient Monitoring (1) Wastewater average daily flow, volume of flow, and cumulative flow to each s Violation N Report Boron Mine Facility 403003 R6V-2015-0057 Y
1115552 08/04/2022 Groundwater Exceeded the CUSUM limit of Antimony, Bicarbonate Alkalinity as CACO3, Boron, Ca Violation N Report Boron Mine Facility 403003 R6V-2015-0057 Y
1115550 12/31/2022 Order Conditions (1) Failure to maintain well 3M-71 in good working order. Violates Board Order R Violation N Report Boron Mine Facility 403003 R6V-2015-0057 Y
1115548 03/15/2022 Deficient Monitoring Unsaturated zone moisture exceeded upper tolerance limits. Field verification te Violation N Report Boron Mine Facility 403003 R6V-2015-0057 Y
1115547 01/31/2022 Order Conditions Surface impoundment action leakage rates exceeded. Violates Board Order R6V-2015 Violation N Report Boron Mine Facility 403003 R6V-2015-0057 Y
1115546 06/30/2022 Deficient Monitoring (1) Wastewater sample was not analyzed for annual constituents of concern in Att Violation N Report Boron Mine Facility 403003 R6V-2015-0057 Y
1115545 04/12/2022 Groundwater (1) Exceeded the CUSUM limit of Fluoride during the 2022 1st Half monitoring per Violation N Report Boron Mine Facility 403003 R6V-2015-0057 Y
1115544 06/30/2022 Order Conditions (1) Failure to maintain the following groundwater monitoring or extraction wells Violation N Report Boron Mine Facility 403003 R6V-2015-0057 Y
1115541 09/21/2021 Deficient Monitoring Unsaturated zone moisture exceeded upper tolerance limits. Field verification te Violation N Report Boron Mine Facility 403003 R6V-2015-0057 Y
1115539 07/31/2021 Order Conditions Surface impoundment action leakage rates exceeded. Violates Board Order R6V-2015 Violation N Report Boron Mine Facility 403003 R6V-2015-0057 Y
1115538 12/31/2021 Deficient Monitoring (1) Wastewater sample was not analyzed for annual constituents of concern in Att Violation N Report Boron Mine Facility 403003 R6V-2015-0057 Y
1115537 12/31/2021 Deficient Monitoring (1) Wastewater average daily flow, volume of flow, and cumulative flow to each s Violation N Report Boron Mine Facility 403003 R6V-2015-0057 Y
1115536 11/18/2021 Groundwater (1) Exceeded the CUSUM limit of Chloride, Mercury, and Sulfate during the 2021 2 Violation N Report Boron Mine Facility 403003 R6V-2015-0057 Y
1115535 12/31/2021 Order Conditions (1) Failure to maintain the following groundwater monitoring or extraction wells Violation N Report Boron Mine Facility 403003 R6V-2015-0057 Y
1115532 06/30/2021 Deficient Monitoring (1) Wastewater average daily flow, volume of flow, and cumulative flow to each s Violation N Report Boron Mine Facility 403003 R6V-2015-0057 Y
1115530 06/30/2021 Order Conditions (1) Failure to maintain the following groundwater monitoring or extraction wells Violation N Report Boron Mine Facility 403003 R6V-2015-0057 Y
1104478 05/19/2022 Order Conditions Failure to maintain total arsenic concentrations below 500 parts per million (pp Violation N Report Boron Mine Facility 403003 R6V-2015-0057 Y
1102499 12/31/2021 Deficient Reporting Failure to report the results of the 2021 Five-Year COC Program to the Water Boa Violation None Report Boron Mine Facility 403003 R6V-2015-0057 Y
1102498 12/31/2021 Deficient Monitoring Failure to conduct the required sampling for the Five-Year COC Program during th Violation N Report Boron Mine Facility 403003 R6V-2015-0057 Y
Report currently showing last five years of violations. Click here to return to viewing one year of violations. Refer to the Interactive Violation Report for more data.
Total Violations: 50
*Click the "(+/-) Violation Description" link to expand and contract the violation description.
  
  
  
  
Expand/Contract Enforcement Actions
Enforcement Actions
Enforcement ID Enforcement Type Enf. Order No. Title Program Effective Date Status
462602 Staff Enforcement Letter None Comments on the 2025 Semi-Annual Report; Detection Monitoring Surface Impoundments, Board Order R6V- 2015-0057, U.S. Borax Mine, U.S. Borax Inc., Rio Tinto LNDISPOTH 09/09/2025 Historical
462600 Staff Enforcement Letter None Board Order R6V- 2015-0057, Detection Monitoring Program, U.S. Borax Mine, U.S. Borax Inc., Rio Tinto, Kern County LNDISPOTH 09/08/2025 Historical
460528 Notice of Violation None NOV 03/24/2025 for US Borax Inc LNDISPOTH 03/24/2025 Active
455401 13267 Letter None 13267 Letter 12/04/2023 for US Borax Inc LNDISPOTH 12/04/2023 Active
452351 Oral Communication None Oral Com 04/20/2023 for US Borax Inc LNDISPOTH 04/20/2023 Active
449819 Oral Communication None Oral Com 11/08/2022 for US Borax Inc LNDISPOTH 05/25/2022 Historical
449592 Notice of Violation None NOV 03/30/2022 for US Borax Inc LNDISPOTH 03/30/2022 Historical
441506 Notice of Violation None NOV 12/03/2020 for US Borax Inc LNDISPOTH 12/03/2020 Active
441057 Notice of Violation None NOV 10/20/2020 for US Borax Inc LNDISPOTH 10/20/2020 Historical
441069 Notice of Violation None NOV 09/11/2017 for US Borax Inc LNDISPOTH 09/11/2017 Historical
395155 Oral Communication None Oral Com 12/11/2013 for EIF Mojave, LLC LNDISP 12/11/2013 Historical
397542 Oral Communication None Oral Com 12/11/2013 for EIF Mojave, LLC LNDISP 12/11/2013 Historical
394166 Staff Enforcement Letter None SEL 11/26/2013 for US Borax Inc LNDISP 11/26/2013 Historical
377136 Notice of Violation R6V-2006-0025 NOV - RIO TINTO MINERALS (12/24/2010) LNDISP 12/24/2010 Active
371430 Notice of Violation R6V-2006-0025 NOV - RIO TINTO MINERALS (09/14/2009) LNDISP 09/14/2009 Active
356611 Notice of Violation R6V-2006-0025 Notice of Violation for US Borax Inc LNDISP 04/14/2008 Historical
252162 Staff Enforcement Letter UNKNOWN Enforcement - 6B152004001 LNDISP 08/02/2004 Historical
245548 Oral Communication UNKNOWN Enforcement - 6B152004001 LNDISP 11/04/2002 Historical
248691 Oral Communication UNKNOWN Enforcement - 6B152004001 TPCA 08/27/2002 Historical
248961 Oral Communication UNKNOWN Enforcement - 6B152004002 LNDISP 07/01/2002 Historical
241177 Oral Communication UNKNOWN Enforcement - 6B152004001 LNDISP 03/18/2002 Historical
238820 Oral Communication UNKNOWN Enforcement - 6B152004001 LNDISP 12/27/2001 Historical
238716 Oral Communication UNKNOWN Enforcement - 6B152004001 LNDISP 10/22/2001 Historical
235356 Oral Communication UNKNOWN Enforcement - 6B152004001 LNDISP 07/10/2001 Historical
234683 Oral Communication UNKNOWN Enforcement - 6B152004001 LNDISP 03/28/2001 Historical
244391 Oral Communication UNKNOWN Enforcement - 6B152004001 LNDISP 11/08/2000 Historical
244388 Notice of Violation UNKNOWN Enforcement - 6B152004001 LNDISP 10/13/2000 Historical
244384 Oral Communication UNKNOWN Enforcement - 6B152004001 LNDISP 09/28/2000 Historical
244341 Oral Communication UNKNOWN Enforcement - 6B152004001 LNDISP 09/24/2000 Historical
244126 Oral Communication UNKNOWN Enforcement - 6B152004001 LNDISP 06/22/2000 Historical
244032 Notice to Comply UNKNOWN Enforcement - 6B152004001 LNDISP 06/06/2000 Historical
243824 Oral Communication UNKNOWN Enforcement - 6B152004002 LNDISP 04/20/2000 Historical
243819 Oral Communication UNKNOWN Enforcement - 6B152004001 LNDISP 03/20/2000 Historical
243775 Notice of Violation UNKNOWN Enforcement - 6B152004001 LNDISP 03/06/2000 Historical
223144 Admin Civil Liability R6V-1998-0022 Enforcement - 6B152004001 LNDISP 04/16/1998 Historical
219576 Clean-up and Abatement Order 90-03701 Enforcement - 6B152004001 LNDISP 05/10/1990 Historical
219702 Clean-up and Abatement Order 85-016 Enforcement - 6B152004001 LNDISP 12/31/1985 Historical
Total Enforcement Actions: 37
  
  
  
  
Expand/Contract Enforcement Actions
Regulatory Measures linked to Related Parties
Reg. Measure ID Organization Regulatory Measure Type Program Effective Date Status
Total Regulatory Measures linked to Related Parties: 0
  
  
The current report was generated with data as of: 06/19/2026
Regional Boards are in the process of entering backlogged data.
As a result, data may be incomplete.
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