Approval Letters and Communications

Type Download Document Name Publish Date Size
Click to Download DTSC Information Request on Historic Well Investigation in 2014 September 27, 2016 37.54 KB
Click to Download DOI and USFWS Review and Approval of Proposed Protective Measures for Roosting Bats July 12, 2016 40.67 KB
Click to Download Chemehuevi Tribe Response to the October 19, 2015, Final Design Directive to PG&E on Modeling Follow-up for Topock Groundwater Remediation Project December 22, 2015 560.21 KB
Click to Download DTSC: Concurrence of TCS-4 Decommissioning December 15, 2015 52.78 KB
Click to Download ARCADIS Response to Fort Mojave Indian Tribe Comments on the Final Design Directives on Topock Groundwater Remediation Project December 4, 2015 30.1 KB
Click to Download Fort Mojave Tribe response to the October 19, 2015, Final Design Directive to PG&E on Modeling Follow-up for Topock Groundwater Remediation Project November 20, 2015 92.28 KB
Click to Download PG&E's Clarificationon on October 19, 2015 Direction Letter for Final Design November 5, 2015 83.52 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 DOI/DTSC's Final Design Directives on Topock Groundwater Remediation Project October 19, 2015 900.1 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, CA 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 Topock Compressor Station Groundwater Remedy Archaeological and Historical Field Procedures and Protocols For Monitoring/Verification October 23, 2014 64.2 KB
Click to Download Topock Compressor Station Groundwater Remedy Request to Reduce Archaeological and Historical Site Annual Monitoring Effort October 21, 2014 55.64 KB
Click to Download DTSC Letter to PG&E: Groundwater Remedy Infrastructure Site Verification Field Work and Request to Reduce Archaeological Sites for Upcoming Annual Monitoring at Pacific Gas and Electric Company (PG&E), Topock Compressor Station Site, Needles, California October 7, 2014 497.34 KB
Click to Download May 8, 2014 and June 11, 2014 Letters on Risk Assessment Work plan Addendum 2 for the Pacific Gas and Electric (PG&E), Topock Compressor Station Site, Needles, California (EPA ID NO. CAT080011729) September 23, 2014 40.66 KB
Click to Download Invitation to Review and Comment on Pacific Gas & Electric Topock Compressor Station Decommissioning Plan for Topock Compressor Station Well 4 (TCS-4) July 11, 2014. Document ID: PGE2014711A September 15, 2014 480.46 KB
Click to Download DTSC Approved Comment Period Extension for Draft Soil Investigation Environmental Impact Report August 4, 2014 58.83 KB
Click to Download DTSC Review of a Risk Assessment Work Plan Addendum 2, PG&E Topock Compressor Station, Needles, California July 18, 2014 1.27 MB
Click to Download Response to Department of Toxic Substance Control's May 22, 2014 Letter "Request for Information Regarding Historic Pacific Gas and Electric Company Wells, Topock Compressor Station Site, Needles, California (EPA ID No. CAT080011729) July 18, 2014 3.59 MB
Click to Download Agencies Approval of RFI/RI Volume I Addendum July 8, 2014 16.48 KB
Click to Download Request for Concurrence on the Pacific Gas and Electric Topock Compressor Station Final Groundwater Remedy, San Bernardino County, California and Mohave County, Arizona July 7, 2014 240.1 KB
Click to Download USACE Confirmation of CERCLA Permit Exemption, PG&E Topock Compressor Station, Needles, California July 10, 2013 283.84 KB
Click to Download February 4, 2013 DTSC Letter Requesting Information on Potential Historic Offsite Disposal of Hazardous Substances from the PG&E Topock Compressor Station (CAT080011729) March 8, 2013 122.84 KB
Click to Download California Department of Fish and Wildlife Confirmation of Application of CERCLA 121(e)(1) Permit Exemption to PG&E Soil and Groundwater Investigation and Remediation Project March 6, 2013 1.04 MB
Click to Download Review of Risk Assessment Work Plan Addendum Scoping Document and Chromium Uptake Technical Memorandum for Pacific Gas and Electric Company (PG&E), Topock Compressor Station, Needles, California (EPA ID No. CAT080011729) February 26, 2013 56.95 KB
Click to Download Request for Information on Potential Historic Offsite Disposal of Hazardous Substances from the PG&E Topock Compressor Station (CAT080011729) February 4, 2013 56.38 KB
Click to Download Correction to the Extension and Modification of the Programmatic Biological Assessment for Pacific Gas and Electric Topock Compressor Station Remedial and Investigative Action, January 2007 January 9, 2013 50.89 KB
Click to Download Extension and Modification of the Programmatic Biological Assessment for Pacific Gas and Electric Topock Compressor Station Remedial and Investigative Action, January 2007 December 27, 2012 73.54 KB
Click to Download PG&E Letter to the BLM regarding the Ethnographic Study, PG&E Topock Compressor Station, Needles, California August 9, 2012 69.68 KB
Click to Download DTSC Acceptance of Cultural Resource Consultant in accordance with CUL-1a-3a, PG&E Topock Compressor Station, Needles, Calfornia March 2, 2012 82.3 KB
Click to Download CUL-1a-3a – Retaining a Qualified Cultural Resource Consultant to implement the Mitigation Monitoring and Reporting Program, PG&E Topock Compressor Station, Needles, California January 27, 2012 88.17 KB
Click to Download Direction to Sample Select Groundwater Wells for Contaminants Recently Detected in Soil Samples and Request to Document Burn Activities within the Area of Concern 4 (AOC-4) Debris Ravine Area, PG&E Topock Compressor Station, Needles, California May 15, 2009 118.9 KB
Click to Download Comments on the Ecological Exposure Parameters, Bioaccumulation Factors, and Toxicity Reference Values Pacific Gas and Electric Company (PG&E) Topock Compressor Station Needles, California (EPA ID NO. CAT080011729) January 18, 2008 1.77 MB
Click to Download CERCLA Permit Exemption November 16, 2007 540.44 KB
Click to Download DOI and Federal Agencies Approval of RFI-RI Volume 1 Revised August 2007 September 21, 2007 310.28 KB
Click to Download Cover Letter to BLM/DTSC Re: Photos of Topock Compressor Station and Vicinity August 22, 2007 231.45 KB
Click to Download DTSC Acceptance Letter of Revised Final RFI/RI Vol 1 August 15, 2007 49.12 KB
Click to Download DTSC Letter Providing Comments on MW-20 Bench Batch Treatment Facility Decommissioning Work Plan July 11, 2007 81.14 KB
Click to Download 2006 Annual Report - Archaeological and Historical Resources Management Activities for Topock (Applied EarthWorks) July 1, 2007 43.72 KB
Click to Download DTSC CMS Work Plan Comments May 15, 2007 83.85 KB
Click to Download DTSC RFI Volume 1 Response to Comments May 9, 2007 203.82 KB
Click to Download DTSC RFI Volume 1 Response to Comments Cover May 9, 2007 37.58 KB
Click to Download DTSC Requirement for Phase II Chromium Isotope Study Workplan April 5, 2007 121.64 KB
Click to Download DTSC Conditional Approval of the In-situ Hexavalent Chromium Reduction Pilot test Work Plan- Upland Plume Treatment April 4, 2007 5.38 MB
Click to Download DTSC Project Organizational Chart October 24, 2006 33.64 KB
Click to Download December 24, 2005 and April 23, 2006 Lubricating Oil Releases Topock Compressor Station - Investigation Results Letter Report September 7, 2006 1.61 MB
Click to Download April 16, April 29, and May 2, 2006 Waste Water Releases at the Topock Compressor Station - Investigation Results Letter Report September 5, 2006 2.23 MB
Click to Download Response to Comments Related to the Site History Portion of the RFI Report Dated February 2005 July 13, 2006 3.75 MB
Click to Download Requirement for the preparation of a data quality Assessment Technical Memorandum March 17, 2006 196.56 KB
Click to Download Clarification regarding requirements for information to be included in progress January 6, 2006 20.12 KB
Click to Download Transmittal of resource conservation recovery act (RCRA) facility assessment questionnaire January 6, 2006 89.5 KB
Click to Download BLM Action Memorandum - Removal Action No. 3 - September 17, 2004 September 17, 2004 910.45 KB
Click to Download Closure Certification Letters - May - June 1995 May 11, 1995 257.63 KB