Click on the boxes in the flow-chart below to view documents from each phase of the process.
Approval Letters and Communications
| Type | Download | Document Name | Publish Date | Size |
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Click to Download | DTSC and DOI Acceptance of the Human Health and Ecological Risk Assessment and Errata, PG&E Topock Compressor Station Needles, California | May 29, 2020 | 186.72 KB |
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Click to Download | Extension for RFI/RI Volume 3 Review | February 27, 2020 | 125.03 KB |
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Click to Download | DOI - Soil Investigation Data Summary Report Request | April 4, 2018 | 86.55 KB |
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Click to Download | DTSC Direction on Refinement of Risk Assessment Evaluation, Pacific Gas and Electric Company (PG&E) Topock Compressor Station, Needles, California (EPA ID NO. CAT080011729) | November 17, 2017 | 47.32 KB |
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Click to Download | DOI Approval of the Topock Soil RFI/RI - Ambient Study of Dioxins and Furans at the Pacific Gas and Electric Company Topock Compressor Station, Needles, California | November 16, 2017 | 83.75 KB |
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Click to Download | DOI Direction to Soil RFI/RI - Ambient/Background Study of Dioxins and Furans at PG&E Topock Compressor Station | September 22, 2017 | 60.58 KB |
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Click to Download | FMIT Comments on Dioxin/Furan Background Technical Memorandum | August 20, 2017 | 66.8 KB |
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Click to Download | Hualapai Comments on Dioxin/Furan Background Technical Memorandum | August 19, 2017 | 157.17 KB |
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Click to Download | PG&E's Response to DTSC May 23, 2017 Analytical Request | June 23, 2017 | 133.73 KB |
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Click to Download | DTSC's direction to PG&E to proceed with the Soil Risk Assessment | June 20, 2017 | 66.2 KB |
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Click to Download | DTSC request letter to PG&E for Soil Analytical Data | May 23, 2017 | 999.68 KB |
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Click to Download | DOI Approve Revised Work Plan for Ambient/Background Study of Dioxin and Furans | March 6, 2017 | 83.58 KB |
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Click to Download | DTSC Approval of Topock Soil RFI/RI Plan to Address Data Gaps Identified during Work Plan Implementation, DG-WP-03, September 21, 2016, for the PG&E Topock Compressor Station, Needles, California | November 10, 2016 | 188.87 KB |
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Click to Download | DOI Conditional Approval of Topock Soil RFI/RI Plan to Address Data Gaps Identified during Work Plan Implementation, DG-WP-03, September 21, 2016, for the PG&E Topock Compressor Station, Needles, California | November 9, 2016 | 287.96 KB |
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Click to Download | Letter from Cocopah to DTSC/DOI regarding comments on Data Gap Work Plan-3 | October 27, 2016 | 659.21 KB |
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Click to Download | Letter from FMIT to DTSC/DOI regarding comments on Data Gap Work Plan-3 | October 27, 2016 | 44.2 KB |
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Click to Download | Letter from Hualapai to DTSC/DOI regarding comments on Data Gap Work Plan-3 | October 27, 2016 | 561.65 KB |
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Click to Download | Letter from DTSC to DOI Regarding Next Steps on Undesignated Area 1 (UA-1) | September 15, 2016 | 2.03 MB |
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Click to Download | DTSC and DOI Conditional Approval of Topock Soil RFI/RI Plan to Address Data Gaps Identified during Work Plan Implementation, DG-WP-02, February 12, 2016, for the PG&E Topock Compressor Station, Needles, California | March 1, 2016 | 187.19 KB |
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Click to Download | DTSC and DOI Conditional Approval of Topock Soil RFI/RI Plan to Address Data Gaps Identified during Work Plan Implementation, DG-WP-01, January 13, 2016, for the PG&E Topock Compressor Station, Needles, California | February 2, 2016 | 188.88 KB |
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Click to Download | DTSC's Response to the Request for Third Extension to Obtain Access Agreements for Work Specified in the Soil RFI/RI Work Plan for the PG&E Topock Compressor Station, Needles, CA | November 24, 2015 | 32.82 KB |
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Click to Download | PG&E's Request for Third Extension to Obtain Access Agreements for the Completion of Work Under the Soil RFI/RI Workplan for the Topock Remediation Project | November 22, 2015 | 90.9 KB |
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Click to Download | PG&E's Request for second extension to obtain access agreements for the completion of work under the Soil RFI/RI Workplan for the Topock Remediation Project | November 2, 2015 | 33.11 KB |
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Click to Download | DTSC's Response to the Request for Extension to obtain access agreements for work specified in the Soil RFI/RI Work Plan for the PG&E Topock Compressor Station, Needles, California | September 23, 2015 | 33.01 KB |
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Click to Download | PG&E's Request for extension to obtain access agreements for the completion of work under the Soil RFI/RI Workplan for the Topock Remediation Project | September 22, 2015 | 95.92 KB |
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Click to Download | DTSC's Clarification of Approval of RAWP Addendum 2 | September 15, 2015 | 218.03 KB |
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Click to Download | DOI - Conditional Approval of the Final Human Health and Ecological Risk Assessment Work Plan Addendum 2, Pacific Gas and Electric Company Topock Compressor Station, Needles, California | September 8, 2015 | 94.79 KB |
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Click to Download | DTSC Approval of the Risk Assessment Work Plan Addendum 2 | August 31, 2015 | 215.04 KB |
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Click to Download | DTSC Approval of Soil RCRA Facility Investigation/Remedial Investigation Work Plan (January 2013) and Addendum and Errata (January 2014) for the Pacific Gas and Electric Company, Topock Compressor Station, Needles, California (EPA ID NO. CAT080011729) | August 24, 2015 | 1.58 MB |
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Click to Download | Final CDFW Response Letter | August 24, 2015 | 1.57 MB |
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Click to Download | CDFW FEIR Comments | August 18, 2015 | 1.18 MB |
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Click to Download | Response to November 30, 2012 FMIT letter regarding Soil Work Plan RTC, Pacific Gas and Electric Company (PG&E), Topock Compressor Station Station, Needles, California | January 7, 2013 | 79.72 KB |
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Click to Download | DOI Letter Regarding the Draft RFI/RI Soil Investigation Work Plan Part B, PG&E Topock Compressor Station, Needles, California | March 10, 2010 | 60.36 KB |
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Click to Download | Part B Soil Investigation Clarification Comments and Additional Direction, PG&E Topock Compressor Station (EPA ID No. CAT080011729) | March 10, 2010 | 484.09 KB |
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Click to Download | DOI Letter Regarding: Acceptance of Work Plan for Time-Critical Removal Action at AOC 4, PG&E Topock Compressor Station, Needles, California | December 18, 2009 | 71.49 KB |
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Click to Download | DTSC Letter Request: Historic Burn Activities and Disposal Practices, PG&E Topock Compressor Station, Needles, California | December 10, 2009 | 469.3 KB |
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Click to Download | DTSC Part B Soil Investigation at the PG&E Topock Compressor Station, Needles, California (EPA ID NO. CAT080011729) | October 5, 2009 | 1.4 MB |
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Click to Download | RCRA Facility Investigation/Remedial Investigation Soil Investigation - Part B, PG&E Topock Compressor Station, Needles, California | August 3, 2009 | 120.33 KB |
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Click to Download | PG&E Proposal to Defer the Part B Soil Investigation at the Topock Compressor Station, Needles, California (EPA ID No. CAT080011729) | July 2, 2009 | 141.81 KB |
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Click to Download | DOI Action Memorandum: Request for Time-Critical Removal Action Number 4 at AOC 4 Debris Ravine, Pacific Gas and Electric Topock Compressor Station | May 28, 2009 | 442.62 KB |
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Click to Download | PG&E: Concurrence on Redline Soils Background Tech Memo, PG&E Topock Compressor Station, Needles, California | May 12, 2009 | 41.65 KB |
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Click to Download | DTSC Approval of the final Risk Assessment Work Plan | February 4, 2009 | 96.66 KB |
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Click to Download | Conditional Concurrence on August 29, 2008 Final Soil and Sediment DUA Usability Assessment Technical Memorandum for PG&E Topock Compressor Station, Needles, California | October 27, 2008 | 41.97 KB |
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Click to Download | DOI Approval of Final Soil and Sediment Data Usability Assessment Technical Memorandum, PG&E Topock Compressor Station Remediation Site | October 15, 2008 | 53.12 KB |
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Click to Download | Field Report: White Powder Occurrences in the East Ravine - Area of Concern (AOC) 10, PG&E Topock Compressor Station, Needles, California | June 18, 2008 | 6.42 MB |
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Click to Download | DTSC Letter Providing Comments on Soil and Sediment Data Usability Assessment Technical Memorandum | August 31, 2007 | 58.19 KB |
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Click to Download | DTSC Letter Providing Comments and Conditional Approval of RFI/RI Soil Investigation Work Plan, Part A | August 10, 2007 | 2.47 MB |