PG&E Hinkley Chromium Cleanup

Document Archive

• PUBLIC COMMENTS ANNOUNCEMENT PG&E Request to Modify Western Action Plan
• PUBLIC COMMENTS ANNOUNCEMENT PG&E Request to Modify Lower Aquifer Plan
• April 2023 Lahontan Water Board Meeting - USGS Background Study Presentation
• April 2023 Lahontan Water Board Meeting - Lahontan Water Board Staff Presentation
• April 26-27, 2023 Board Meeting Announcement USGS Background Study Release (Revised)
• June 8-9, 2022 Board Meeting Announcement PG&E Annual Update
• Issuance of a New Notice of Applicability of General Waste Discharge Requirements for In-Situ Remediation Zones and the Freshwater Injection Systems (Board Order No. R6V-2008-0014), Pacific Gas and Electric Company's Hinkley Compressor Station, San Bernardino County - dated October 5, 2021 (165 page document)
• 2018 Annual Sampling Frequency Evaluation under Cleanup and Abatement Order No. R6V-2015-0068, Pacific Gas and Electric Company Hinkley Compressor Station, San Bernardino County

Notice of Extended Comment Period: New deadline to submit comments is August 24, 2021 - Public review and comment opportunity, draft updated requirements for in-situ remediation zones and the freshwater injection systems, Pacific Gas and Electric Company (PG&E), Hinkley, San Bernardino County - Comments now due by 5pm, August 24, 2021

Public Review and Comment Opportunity, Draft Updated Requirements for In-Situ Remediation Zones and the Freshwater Injection Systems, Pacific Gas and Electric Company (PG&E), Hinkley, San Bernardino County - Comments due by 5pm, August 9, 2021

Concurrence with Water Conservation Program: Basin Wide Approach to Mitigate Potential Groundwater Impacts Associated with Operation of Agricultural Treatment Units (ATUs) and Managing Potential ATU Byproducts, Pacific Gas & Electric Company Hinkley Compressor Station, San Bernardino County

No Further Reporting Required by Pacific Gas and Electric Company, Former Waste Pit (Assessor Parcel No. 0488-074-03) and MW-163S/D Investigations (West Community Boulevard) Hinkley, Investigative Order No. R6V-2014-0019, San Bernardino County, Site Cleanup Program Case T10000005814

Frequently Asked Questions about Whole House Replacement Water Supply

Water Board Staff comments on PG&E whole house water treatment systems proposal, dated December 16, 2011

Executive Officer Request for Information to the Office of Environmental Health Hazard Assessment (posted 7/19/11)

Memorandum dated August 17, 2011 from the Office of Environmental Health Hazard Assessment to the Request for Information posted above (posted 8/17/11)

Executive Officer's response to public request to not use new Cr6 MCL for replacement water

Executive Officer Response to 3rd Quarter Monitoring Report, dated December 12, 2013

The Lahontan Water Board is soliciting comments on proposed modifications to the Whole House Replacement Water Program. Comments are due by noon on October 21, 2013. Click here for more information.

• Comments Received
  • November 19, 2013 EO Decision on Requests by PG&E and Hinkley Community
  • October 31, 2013 Executive Officer Response to PG&E
  • October 21, 2013 Prosecution Team
  • October 17, 2013 Spasojevich
  • October 15, 2013 Hinkley Citizens
  • October 13, 2013 Banks
  • October 10, 2013 CAC
  • September 30, 2013 Schoffstall
  • September 30, 2013 Banks
  • September 16, 2013 Panchev
  • September 13, 2013 Panchev
  • September 13, 2013 Panchev Attachment
  • September 12, 2013 Banks
  • September 12, 2013 Panchev
  • September 11, 2013 Panchev
  • September 9, 2013 Banks
  • September 9, 2013 Schoffstall
  • September 3, 2013 PG&E

Lahontan Water Board response to the PG&E Petition to the State Water Resources Control Board of Cleanup and Abatement Order No. R6V-2011-0005A1

Development of Agricultural Treatment Unit WDRs, 2013-2014

• Water Board staff’s responses to comments on the proposed WDRs
• Late revisions to proposed WDRs
• Comments received on Proposed Waste Discharge Requirements
  • Independent Review Panel Manager
  • Water Board Advisory Team
  • U.S. Fish and Wildlife Service
• New! Proposed Waste Discharge Requirements for PG&E Hinkley Agricultural Treatment Units available for review. The Water Board will consider adopting the WDRs at its regular meeting in Barstow on March 12, 2014. The agenda will be posted no later than 10 days prior to the meeting at https://www.waterboards.ca.gov/lahontan/.
  
  If you wish to provide comments on the revisions contained in the Proposed WDRs, please do so no later than 5 pm on February 28, 2014. Contact Anne Holden at Anne.Holden@waterboards.ca.gov or 530-542-5450 if you have comments or questions.
  • Proposed WDRs Summary Sheet
  • Proposed WDRs
  • Attachments:
    • Map of Project Area and Location of Operable Units
    • Map of Existing Agricultural Treatment Units
    • Standard Provisions for Waste Discharge Requirements
    • General Provisions for Monitoring and Reporting
    • WDRs Monitoring, Modeling and Reporting Program
    • EIR Mitigation Monitoring and Reporting Program
    • State Water Board Resolution 68-16 Analysis
    • Findings of Fact and Statement of Overriding Considerations
  • Water Board staff responses to public comments
• Comments received on tentative WDRs now available:
  • Comments from Water Board members and Advisory Team
  • Independent Review Panel Manager’s comments
  • Pacific Gas and Electric Company’s comments
    • Cover letter
    • Comments on Permit
    • Comments on Monitoring
• Tentative Waste Discharge Requirements for PG&E Hinkley Agricultural Treatment Units available for review. Comments are requested by January 13, 2014. The Water Board will discuss the tentative WDRs at its regular meeting in Barstow on January 8, 2014. Click here for more information: Cover Letter.
  
  Click the links below to view and download the WDRs and attachments.
  • Tentative WDRs
  • Attachments
    • Map of Project Area and Location of Operable Units
    • Map of Existing Agricultural Treatment Units
    • Standard Provisions for Waste Discharge Requirements
    • General Provisions for Monitoring and Reporting
    • WDRs Monitoring, Modeling and Reporting Program
    • EIR Mitigation Monitoring and Reporting Program
    • State Water Board Resolution 68-16 Analysis

Information Regarding March 14, 2013 Water Board Public Meeting in Hinkley

• Public meeting on March 14, 2013, regarding manganese in domestic wells and discussion of recent workplans submitted by PG&E. Meeting announcement is provided in English and Spanish
• New! Meeting materials from March 14, 2013 meeting in Hinkley
  • Manganese Working Group Status Sheet [English | Spanish]
  • Water Board staff presentation
  • PG&E’s Chromium plume definition workplan in response to CAO R6V-2008-002A4, dated Feb. 22, 2013
    • Addendum to the chromium plume definition workplan, dated March 15, 2013
    • Water Board Response to PG&E Workplan, dated May 2, 2013
  • PG&E’s In-situ Remediation Zone (IRZ) byproduct plume investigation workplan, dated Feb. 15, 2013
• Public comments requested on PGE’s request to modify the whole house replacement water program and related monitoring plans. Comments are requested by March 20, 2013.
  • Water Board Executive Officer’s response to PG&E’s request to modify the whole house water program and related monitoring plans
  • PG&E's request for clarification on Water Board's position regarding access agreements for whole house water systems, dated April 2, 2013
    • Water Board response to PG&E’s request for clarification regarding access agreements, dated April 18, 2013
  • PG&E's Update on Whole House Water Program, dated April 2, 2013
  • Water Board Prosecution Team comments on PG&E’s request to modify whole house replacement water program
    • CAC Response to Prosecution Comments (April 9, 2013)
  • New! Comments Received
    • Banks (dated March 20, 2013)
    • Dishmon (dated February 21, 2013)
    • Burns (March 20, 2013)
    • Hernandez (March 20, 2013)
    • Project Navigator (March 20, 2013)

Presentations and Handouts from December 8, 2011 Water Board Public Meeting in Hinkley

• Cleanup Status and Whole House Water Order Presentation
• Background Study Peer Review Summary Presentation
• Environmental Impact Report Update Presentation
• EIR timeline handout
• Project Update Fact Sheet (English)
• Project Update Fact Sheet (Spanish)
• PG&E_Resp_to_Inv_Order_2011-0104_1-5-12.pdf

January 26 and 27, 2011 Public Meetings in Hinkley - Presentations and Information

• Environmental Impact Report Presentation
• Groundwater Cleanup Status Presentation
• Cross Section of Groundwater Chromium Plume
• Plume map
• Plume map north of Sante Fe Ave

Groundwater Contamination

• Key Points regarding the current status of the groundwater contamination at Hinkley, November 10, 2010
• Fact Sheet on Groundwater Cleanup Projects (April 2010)
• Fact Sheet on Groundwater Cleanup Projects - August 2008, and Announcement of a Public Meeting in Hinkley, September 11, 2008
• Fact Sheet on Groundwater Cleanup Projects, February 2008
• Tentative General Waste Discharge Requirements for PG&E Chromium Cleanup
• Draft CEQA Document Supporting Mitigated Negative Declaration for General Permit
• Fact Sheet on Groundwater Cleanup Projects, February 2007
  Note: The Fact Sheet identifies a Ranch Land Treatment Unit project that is no longer being considered.

Maps of Chromium Plume

4th Qtr 2021

• 4th Quarter 2021 Upper Aquifer Plume Map (11x17”)
• 4th Quarter 2021 Upper Aquifer Plume Map (8.5x11”)
• Grid Book Format of the 4th quarter 2021 Plume Map

3rd Qtr 2021

• 3rd Quarter 2021 Upper Aquifer Plume Map (11x17")
• 3rd Quarter 2021 Upper Aquifer Plume Map (8.5x11")
• Grid Book Format of the 3rd quarter 2021 Plume Map

2nd Qtr 2021

• 2nd Quarter 2021 Upper Aquifer Plume Map (11x17")
• 2nd Quarter 2021 Upper Aquifer Plume Map (8.5x11")
• Grid Book Format of the 2nd Quarter 2021 Plume Map


• 1st Qtr 2021
  
• 1st Quarter 2021 Upper Aquifer Plume Map (11x17")
• 1st Quarter 2021 Upper Aquifer Plume Map (8.5x11"
• Grid Book Format of the 1st Quarter 2021 Plume Map

4th Qtr 2020

• 4th Quarter 2020 Upper Aquifer Plume Map (11x17")
• 4th Quarter 2020 Upper Aquifer Plume Map (8.5x11")
• Grid Book Format of the 4th Quarter 2020 Plume Map

3rd Qtr 2020

• 3rd Quarter 2020 Upper Aquifer Plume Map (11x17")
• 3rd Quarter 2020 Upper Aquifer Plume Map (8.5x11")
• Grid Book Format of the 3rd Quarter 2020 Plume Map

2nd Qtr 2020

• 2nd Quarter 2020 Upper Aquifer Plume Map (11x17")
• 2nd Quarter 2020 Upper Aquifer Plume Map (8.5x11")
• Grid Book Format of the 2nd Quarter 2020 Plume Map

1st Qtr 2020

• 1st Quarter 2020 Upper Aquifer Plume Map (11x17")
• 1st Quarter 2020 Upper Aquifer Plume Map (8.5x11")
• Grid Book Format of the 1st Quarter 2020 Plume Map

4th Qtr 2019

• 4th Quarter 2019 Upper Aquifer Plume Map (11x17")
• 4th Quarter 2019 Upper Aquifer Plume Map (8.5x11")
• Grid Book Format of the 4th Quarter 2019 Plume Map

3rd Qtr 2019

• 3rd Quarter 2019 Upper Aquifer Plume Map (11x17")
• 3rd Quarter 2019 Upper Aquifer Plume Map (8.5x11")
• Grid Book Format of the 3rd Quarter 2019 Plume Map

2nd Qtr 2019

• 2nd Quarter 2019 Upper Aquifer Plume Map (11x17")
• 2nd Quarter 2019 Upper Aquifer Plume Map (8.5x11")
• Grid Book Format of the 2nd Quarter 2019 Plume Map

1st Qtr 2019

• 1st quarter 2019 Upper Aquifer Plume (8.5 x 11" prints on 6 sheets)
• 1st quarter 2019 Upper Aquifer Plume (11 x 17" prints on 2 sheets)
• Grid Book Format of the first quarter 2019 map is available here


• The grid book format of the fourth quarter 2018 map is available here
• 4th quarter 2018 Upper Aquifer Plume (8.5 x 11", prints on 6 sheets)
• 4th quarter 2018 Upper Aquifer Plume (11x 17", prints on 2 sheets)
• The grid book format of the third quarter 2018 map is available here
• 3rd quarter 2018 Upper Aquifer Plume (8.5 x 11", prints on 6 sheets)
• 3rd quarter 2018 Upper Aquifer Plume (11x 17", prints on 2 sheets)
• The grid book format of the second quarter 2018 map is available here
• 2nd quarter 2018 Upper Aquifer Plume (8.5 x 11", prints on 6 sheets)
• 2nd quarter 2018 Upper Aquifer Plume (11x 17", prints on 2 sheets)
• The grid book format of the first quarter 2018 map is available here
• 1st quarter 2018 Upper Aquifer Plume (8.5 x 11", prints on 6 sheets)
• 1st quarter 2018 Upper Aquifer Plume (11x 17", prints on 2 sheets)
• The grid book format of the fourth quarter 2017 map available here
• 4th quarter 2017 Upper Aquifer Plume (8.5 x 11", prints on 6 sheets)
• 4th quarter 2017 Upper Aquifer Plume (11x 17", prints on 2 sheets)
• The grid book format of the third quarter 2017 map available here
• 3rd quarter 2017 Upper Aquifer Plume (8.5 x 11", prints on 6 sheets)
• 3rd quarter 2017 Upper Aquifer Plume (11x 17", prints on 2 sheets)
• The grid book format of the second quarter 2017 map available here
• 2nd quarter 2017 Upper Aquifer Plume (8.5 x 11", prints on 6 sheets)
• 2nd quarter 2017 Upper Aquifer Plume (11x 17", prints on 2 sheets)
• The grid book format of the first quarter 2017 map available here
• 1st quarter 2017 Upper Aquifer Plume (8.5 x 11", prints on 6 sheets)
• 1st quarter 2017 Upper Aquifer Plume (11x 17", prints on 2 sheets)
• The grid book format of the fourth quarter 2016 map available here
• 4th quarter 2016 Upper Aquifer Plume (8.5" x 11", prints on 6 sheets)
• 4th quarter 2016 Upper Aquifer Plume (11" x 17", prints on 2 sheets)
• The grid book format of the third quarter 2016 map available here
• 3rd quarter 2016 Upper Aquifer Plume (8.5" x 11", prints on 6 sheets)
• 3rd quarter 2016 Upper Aquifer Plume (11" x 17', prints on 2 sheets)
• The grid book format of the second quarter 2016 map available here
• 2nd quarter 2016 Upper Aquifer Plume Map (8.5" x 11", prints on 6 sheets)
• 2nd quarter 2016 Upper Aquifer Plume Map (11" x 17", prints on 2 sheets)
• The grid book format of the first quarter 2016 map available here.
• 1st quarter 2016 Upper Aquifer plume map (8.5 x 11", prints on 6 sheets)
• 1st quarter 2016 Upper Aquifer plume map (11 x 17", prints on 2 sheets)
• The grid book format of the fourth quarter 2015 map is available here.
• 4th Quarter 2015 Upper Aquifer Plume Map  (8.5" x 11", prints on four sheets)
• 4th Quarter 2015 Upper Aquifer Plume Map  (11” x 17", prints on two sheets)
• The grid book format of the third quarter 2015 map is available here.
• 3rd Quarter 2015 Upper Aquifer Plume Map (8.5" x 11", prints on four sheets)
• 3rd Quarter 2015 Upper Aquifer Plume Map (11" x 17", prints on two sheets)
• 2nd Quarter 2015 Upper Aquifer Plume Map (8.5" x 11", prints on four sheets)
• 2nd Quarter 2015 Upper Aquifer Plume Map (11" x 17", prints on two sheets)
• 1st Quarter 2015 Upper Aquifer Plume Map (8.5" x 11", prints on four sheets)
• 1st Quarter 2015 Upper Aquifer Plume Map (11" x 17”, prints on two sheets)
• 4th Quarter 2014 Upper Aquifer Plume Map (8.5" x 11", prints on four sheets)
• 4th Quarter 2014 Upper Aquifer Plume Map (11" x 17”, prints on two sheets)
• 3rd Quarter 2014 Upper Aquifer Plume Map (8.5" x 11", prints on four sheets)
• 3rd Quarter 2014 Upper Aquifer Plume Map (11" x 17”, prints on two sheets)
• 2nd Quarter 2014 Upper Aquifer  Plume Map (8.5" x 11", prints on four sheets)
• 2nd Quarter 2014 Upper Aquifer  Plume Map (11" x 17”, prints on two sheets)
• 1st Quarter 2014 Upper Aquifer Plume Map ( (8.5" x 11", prints on four sheets)
• 1st Quarter 2014 Upper Aquifer Plume Map (11" x 17", prints on two sheets
• 4th Quarter 2013 Upper Aquifer Plume Map (8.5” x 11”, prints on four sheets)
• 4th Quarter 2013 Upper Aquifer Plume Map (11” x 17”, prints on two sheets)
• 3rd Quarter 2013 Upper Aquifer Plume Map (8.5” x 11”, prints on four sheets)
• 3rd Quarter 2013 Upper Aquifer Plume Map (11” x 17”, prints on two sheets)
• 2nd Quarter 2013 Upper Aquifer Plume Map (8.5 x 11”, prints on four sheets)
• 2nd Quarter 2013 Upper Aquifer Plume Map (11 x 17”, prints on two sheets)
• 1st Quarter 2013 Upper Aquifer Plume Map (8.5” x 11”, prints on four sheets)
• 1st Quarter 2013 Upper Aquifer Plume Map (11” x 17”, two sheets)
• 4th Quarter 2012 Upper Aquifer Plume Map (8.5” x 11”, prints on four sheets)
• 4th Quarter 2012 Upper Aquifer Plume Map (11” x 17”, two sheets)
• 3rd Quarter 2012 Upper Aquifer Plume Map (8.5" x 11" size, prints on four sheets)
• 3rd Quarter 2012 Upper Aquifer Plume Map (11" x 17" size, two sheets)
• 2nd Quarter 2012 Upper Aquifer Plume Map (8.5" x 11" size, prints on four sheets)
• 2nd Quarter 2012 Upper Aquifer Plume Map (11" x 17" size, two sheets)
• 1st Quarter 2012 Print Version of Upper Aquifer Plume Map (8.5" x 11" size, prints on four sheets)
• 1st Quarter 2012 Upper Aquifer Plume Map (11" x 17" size, two sheets)
• 4th Quarter 2011 Print Version of Upper Aquifer Plume Map (8.5" x 11" size, prints on two sheets)
• 4th Quarter 2011 Upper Aquifer Plume Map (11" x 17" size)
• 3rd Quarter 2011 Print Version of Upper Aquifer Plume Map (8.5" X 11" size, prints on two sheets)
• 3rd Quarter 2011 Upper Aquifer Plume Map
• 2nd Quarter Print Versions of plume maps (8.5" x 11" size)
  • Maximum chromium concentrations in shallow upper aquifer
  • Most recent chromium concentrations in shallow upper aquifer
  • Maximum chromium concentrations in deep upper aquifer
  • Maximum chromium concentrations in upper aquifer, northwest plume area
  • Most recent chromium concentrations in upper aquifer, northwest plume area
• 2nd Quarter - 2011 | First Quarter - 2011
• November 2010 (rev 2/2011)
  8.5" x 11" print version of November 2010 plume map (this map is split into 2 sections for printing on standard letter-size paper)
• August 2010
  (This is the first time the 3.1 ppb chromium concentration boundary is shown. It was previously mapped to the 4.0 ppb concentration line.
• February 2010 | August 2009 | February 2009 | August 2008 | February 2008 | August 2007
  February 2007 | August 2006