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
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
Click to Download Extension for RFI/RI Volume 3 Review February 27, 2020 125.03 KB
Click to Download DOI - Soil Investigation Data Summary Report Request April 4, 2018 86.55 KB
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
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
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
Click to Download FMIT Comments on Dioxin/Furan Background Technical Memorandum August 20, 2017 66.8 KB
Click to Download Hualapai Comments on Dioxin/Furan Background Technical Memorandum August 19, 2017 157.17 KB
Click to Download PG&E's Response to DTSC May 23, 2017 Analytical Request June 23, 2017 133.73 KB
Click to Download DTSC's direction to PG&E to proceed with the Soil Risk Assessment June 20, 2017 66.2 KB
Click to Download DTSC request letter to PG&E for Soil Analytical Data May 23, 2017 999.68 KB
Click to Download DOI Approve Revised Work Plan for Ambient/Background Study of Dioxin and Furans March 6, 2017 83.58 KB
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
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
Click to Download Letter from Cocopah to DTSC/DOI regarding comments on Data Gap Work Plan-3 October 27, 2016 659.21 KB
Click to Download Letter from FMIT to DTSC/DOI regarding comments on Data Gap Work Plan-3 October 27, 2016 44.2 KB
Click to Download Letter from Hualapai to DTSC/DOI regarding comments on Data Gap Work Plan-3 October 27, 2016 561.65 KB
Click to Download Letter from DTSC to DOI Regarding Next Steps on Undesignated Area 1 (UA-1) September 15, 2016 2.03 MB
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
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
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
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
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
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
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
Click to Download DTSC's Clarification of Approval of RAWP Addendum 2 September 15, 2015 218.03 KB
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
Click to Download DTSC Approval of the Risk Assessment Work Plan Addendum 2 August 31, 2015 215.04 KB
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
Click to Download Final CDFW Response Letter August 24, 2015 1.57 MB
Click to Download CDFW FEIR Comments August 18, 2015 1.18 MB
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
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
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
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
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
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
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
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
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
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
Click to Download DTSC Approval of the final Risk Assessment Work Plan February 4, 2009 96.66 KB
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
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
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
Click to Download DTSC Letter Providing Comments on Soil and Sediment Data Usability Assessment Technical Memorandum August 31, 2007 58.19 KB
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

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