Includes U.S. EPA notices of approval or disapproval, notices of non-compliance, Enbridge status updates, water sampling documents.

For Enbridge work plans, see Enbridge Spill 2011 Work Plans and Enbridge Spill 2011 Work Plans - Supplements to Response Plan for Downstream Impacted Areas and to the Source Area Response Plan

• U.S. EPA Notice of Approval of Enbridge's Supplement to Operations and Maintenance Work Plan - Feb. 10, 2011 (PDF)(2 pp, 108 K)
  U.S. EPA Written Approval of Enbridge's Dec. 10, 2010 Supplement to Operations and Maintenance Work Plan ("Winter Containment Plan")
• US EPA Conditional approval of Enbridge's Feb. 28, 2011 submittal - March 3, 2011 (PDF)(3 pp, 289 K)
  Approval of Supplement to Operations and Maintenance Work Plan Referred to as 2011 SPRiNG Containment Plan
• US EPA Notice of Disapproval of Enbridge Energy''s March 14, 2011 submittal - March 25, 2011 (PDF)(5 pp, 525 K)
  Supplement to the Response Plan for Downstream Impacted Areas and the Source Area Response Plan or Aerial Imagery Work Plan disapproval
• US EPA Notice of Disapproval of Enbridge's Overbank and Poling Reassessment Work Plan Submitted March 14, 2011 - March 29, 2011 (PDF)(4 pp, 787 K)
  Disapproval of Enbridge's Overbank and Poling Reassessment Work Plan Submitted March 14, 2011
• U.S. EPA Notice of Conditional Approval of Enbridge Energy's March 28, 2011 submittal - March 29, 2011 (PDF)(3 pp, 489 K)
  Conditional Approval of the Aerial Imagery Work Plan and Required Documentation and Reporting of Recovered Oil
• EPA notice of Conditional Approval with modifications of Enbridge's overbank poling reassessment work plan - April 5, 2011 (PDF)(3 pp, 253 K)
  EPA conditional approval with modifications of Enbridge's March 31 submittal: Overbank poling reassessment workplan
• U.S. EPA Transmittal of Imagery Data - May 4, 2011 (PDF)(1 pg, 36 K)
  US EPA has completed a high definition aerial imagery of the Talmadge Creek and Kalamazoo River system.
• US EPA Notice of Approval of Enbridge Energy''s April 29, 2011 submittal - May 10, 2011 (PDF)(1 pg, 146 K)
  Approval of letter regarding adverse weather conidtions and associated impact on the Kalamazoo River and overbank areas targeted for reassessment.
• EPA conditional approval of Enbridge April 28, 2011 submittal and and disapproval of Enbridge May 2, 2011 submittal - May 12, 2011 (PDF)(10 pp, 572 K)
  EPA approves with modifications the April 28, 2011 Transfer of Operations work plan. EPA disapproves the May 2, 2011 Waste Treatment, Transportation and Disposal Plan.
• US EPA Notice of Conditional Approval of Enbridge Energy''s May 13, 2011 submittal - May 17, 2011 (PDF)(3 pp, 269 K)
  Coniditonal approval of Waste Treatment, Transportation and Disposal Plan with suggested revisions
• U.S. EPA Notice of Conditional Approval of Enbridge Energy''s May 12, 2011 submittal - May 18, 2011 (PDF)(2 pp, 388 K)
  Approval of proposed schedule extension for submission of a report documenting reassessment activities performed in spring 2011.
• Overbank Oil Recovery Standard Operating Procedures - June 8, 2011 (PDF)(6 pp, 684 K)
  Introduction, site selection, overbank oil recovery procedures including mechanical and vacuum removal and organic sorben application
• US EPA notice of conditional approval of Enbridge''s June 4, 2011 submittal - June 13, 2011 (PDF)(2 pp, 184 K)
  proposed schedule extension for submission of spring 2011 reassessment activities report - June 13, 2011
• US EPA Notice of Approval of Enbridge Energy''s June 10, 2011 submittal - June 16, 2011 (PDF)(1 pg, 262 K)
  Approval of Second Supplement to the Response Plan for Downstream Impacted Areas and the Source Area Response Plan, or Work Plan for Supplemental Poling in Morrow Lake
• EPA Notice of Conditional Approval of Enbridge''s May 25, 2011 Request - June 17, 2011 (PDF)(3 pp, 336 K)
  Approval and comments for the Waste Characterization and Oil Recovery Sampling for Soils and Sediment at the Enbridge Line
• EPA notice of conditional approval of Enbridge air monitoring and sampling plan - June 17, 2011 (PDF)(4 pp, 333 K)
  Conditional approval of Enbridge's June 15, 2011 submittal in response to a U.S. EPA directive to prepare an air monitoring and sampling plan.
• US EPA Notice of Oil Recovery Directive for Summer 2011 - June 17, 2011 (PDF)(2 pp, 350 K)
  Enbridge shall prepare an addendum for Response Plan for Downstream Impacted Areas and Work Plan for Permanent Recovery of Submerged Oil and Oil-Contaminated Sediments
• US EPA notice of EPA determination of Enbridge non-compliance - June 27, 2011 (PDF)(2 pp, 477 K)
  U.S. EPA oversight personnel observed and documented the discharge of sediment and oil sheen generated by submerged oil recovery operations in Talmadge Creek to the Kalamazoo River.
• EPA Notice of potential non-compliance - June 28, 2011 (PDF)(2 pp, 320 K)
  Letter: Notice of potential non-compliance - inadequate Enbridge response management
• Enbridge response to U.S. EPA Notice of Potential Non-compliance June 28, 2011 - July 1, 2011 (PDF)(12 pp, 244 K)
  Enbridge response to EPA Notice concerning Inadequate Enbridge Response Management
• Kalamazoo River Submerged Oil Locations - July 15, 2011 (PDF)(4 pp, 342 K)
  Map showing Kalamazoo River submerged oil locations as of July 15, 2011
• Enbridge figure showing Overbank Tar Patty and Excavation Locations - July 15, 2011 (PDF)(1 pg, 70 K)
  Overbank tar patty and excavation locations
• EPA Directive to modify work plan and quantify submerged oil - July 15, 2011 (PDF)(2 pp, 165 K)
  EPA directs Enbridge to prepare a work plan addendum and quantify the submerged oil identified in 2011 spring reassessment
• Approval of Enbridge's Response Management Plan - July 19, 2011 (PDF)(2 pp, 95 K)
  U.S. EPA approval of Enbridge Respone Management Plan submitted July 1, 2011
• U.S. EPA Notice of Disapproval for 2011 Summer Strategic Work Plan and Dredging Supplement - July 27, 2011 (PDF)(7 pp, 791 K)
  EPA disapproves Enbridge's 2011 Summer Work plan and dredging supplement
• U.S. EPA Notice of Disapproval for Addendum to Quantify Submerged Oil - July 27, 2011 (PDF)(5 pp, 731 K)
  EPA disapproves Enbridge Oil Quantification Plan
• Final Community Involvement Plan, Enbridge Oil Spill Site, Marshall, Michigan, July 2011 (PDF)(200 pp, 419 K)
  Kalamazoo River/Enbridge community involvement plan for site in Marshall, Michigan
• EPA Notice of potential non-compliance - August 2, 2011 (PDF)(4 pp, 713 K)
  Cover letter EPA Notice of potential non-compliance with EPA directive to Enbridge to prepare Air Monitoring and Sampling plan.
• US EPA Denial to Request to Modify Schedule, August 3, 2011 (PDF)(1 pg, 486 K)
  U.S. EPA denies Enbridge's request for schedule modification.
• Enbridge Response to July 20 and August 2, 2011 letters about site meteorological data - Aug. 4, 2011 (PDF)(2 pp, 9 MB)
  Enbridge response to Notice of Potential Non-compliance
• U.S. EPA Notice of Approval of Enbridge Energy - Aug. 12, 2011 (PDF)(2 pp, 607 K)
  U.S. EPA letter - Notice of Approval of Enbridge's Quantification of Submerged Oil Work Plan (PDF) (2 pp, 590K) - Aug. 12, 2011
• Disapproval of Enbridge's Air Monitoring & Sampling Report - August 23, 2011 (PDF)(9 pp, 648 K)
  EPA disapproves Enbridge Report of Findings 2011 Air Monitoring & Sampling submitted July 27, 2011
• Enbridge status update on Quantification of Submerged Oil Report - August 26, 2011 (PDF)(1 pg, 342 K)
  Enbridge status update on quantification of submerged oil report and request for deadline extension relating to cleanup of July 2010 Enbridge oil discharge in Marshall, MI
• Letter to follow up on August Deadline Concerns - August 29, 2011 (PDF)(2 pp, 22 K)
  Letter from Enbridge about August 31, 2011 oil recovery deadline
• Notice of Enbridge Failure to Comply with Oil Recovery Directive Deadline for Summer 2011 - August 30, 2011 (PDF)(2 pp, 211 K)
  EPA notifies Enbridge of its failure to comply with August 31, 2011 oil recovery deadline
• Schedule of Oil Recovery Activities at Overbank Wetland Areas - August 30, 2011 (PDF)(4 pp, 289 K)
  Exclusion of overbank wetland areas MP 8.5 L1 and L2, MP 25.41 from August 31. 2011oil recovery deadline for cleanup of July 2010 Marshall, MI Enbridge oil spill
• Directive for Additional Hydrodynamic Assessment - August 31, 2011 (PDF)(8 pp, 638 K)
  EPA directs Enbridge to prepare workplan addendum and perform hydrodynamic assessment acrivities in the cleanup of July 2010 Enbridge oil discharge in Marshall, MI
• Private and public drinking water well sampling - August 31, 2011 (PDF)(2 pp, 516 K)
  EPA transfers responsibility for directing Enbridge in driinking water well sampling to MDEQ
• U.S. EPA Approval with Modifications of Enbridge''s Odor Investigation Summary Report - Sept. 20, 2011 (PDF)(2 pp, 774 K)
  U.S. EPA letter approving the 2011 Odor Investigation Summary Report with modifications
• EPA Approval of Enbridge's requested modification to Air Monitoring and Sampling - Sept. 20, 2011 (PDF)(2 pp, 585 K)
  EPA approves Enbridge's September 9, 2011 requested modification of the 2011 Air Monitoring and Sampling Addendum dated June 21, 2011 (Turn-around time)
• Modifications to Work Plans for Oil Recovery Activities to be Conducted from Fall 2011 through Fall 2012 - Oct. 6, 2011 (PDF)(6 pp, 371 K)
  EPA requires modifications to Work Plans for Oil Recovery Activities to be Conducted from Fall 2011 through Fall 2012
• U.S. EPA Approval with modifications of Enbridge''s October 13, 2011 request - Oct. 26, 2011 (PDF)(2 pp, 747 K)
  U.S. EPA Approval with modifications of Enbridge's October 13, 2011 requested modification of the 2011 Air Monitoring and Sampling Addendum dated June 21, 2011 for indefinite suspension of all Community Air Sampling and Monitoring activities, Work Area Mon
• EPA Approval with modifications of Enbridge Request for Modification to Air Monitoring and Sampling - Oct. 26, 2011 (PDF)(27 pp, 242 K)
  EPA approves with modifications Enbridge's October 13, 2011 requested modification of the 2011 Air Monitoring and Sampling Addendum dated June 21, 2011 for indefinite suspension of all Community Air Sampling and Monitoring activities, Work Area Monitoring,
• U.S. EPA Approval with modifications of Enbridge''s Revised Response re: Site Meteorological Data - Nov. 4, 2011 (PDF)(2 pp, 359 K)
  U.S. EPA letter - Approval with modifications of Enbridge's Revised Response to July 20, 2011 EPA letter Regarding Site Meteorological Data
• U.S. EPA Required Modification to Enbridge's Consolidated Work Plan - Nov. 17, 2011 (PDF)(13 pp, 1 MB)
  EPA Required Modification to Enbridge's Consolidated Work Plan for Activities through 2012 submitted Oct. 20, 2011
• EPA Approval, with modifications, of Enbridge''s Report of Findings 2011 Air Monitoring and Sampling - Dec. 15, 2011 (PDF)(2 pp, 701 K)
  EPA approves with modifications Enbridge's Report of Findings 2011 Air Monitoring and Sampling
• U.S. EPA Disapproval of Enbridge's Background Sediment Report - Dec. 19, 2011 (PDF)(11 pp, 93 K)
  U.S. EPA letter - Disapproval of Enbridge's Report of Findings for Background Sediment Concentrations, Investigation for Upstream Sample Areas - Dec. 19, 2011