overview of project 1007 and summary of near-term ... · overview of project 1007 and summary of...
TRANSCRIPT
![Page 1: Overview of Project 1007 and Summary of Near-Term ... · Overview of Project 1007 and Summary of Near-Term Assessment Tasks Daryl Beck, P.E., Senior Engineer - AECOM Rebecca Higgins,](https://reader034.vdocuments.us/reader034/viewer/2022042709/5f448e046d98571df963808f/html5/thumbnails/1.jpg)
Overview of Project 1007 and Summary of Near-TermAssessment Tasks Daryl Beck, P.E., Senior Engineer - AECOM Rebecca Higgins, HydroGeologist - MPCA
May 15, 2019
![Page 2: Overview of Project 1007 and Summary of Near-Term ... · Overview of Project 1007 and Summary of Near-Term Assessment Tasks Daryl Beck, P.E., Senior Engineer - AECOM Rebecca Higgins,](https://reader034.vdocuments.us/reader034/viewer/2022042709/5f448e046d98571df963808f/html5/thumbnails/2.jpg)
Project 1007 within the 3M Settlement
3M Settlement – Included in Priority 1: “The MPCA shall conduct a source assessment and feasibility study regarding the roleof the Valley Branch Water District's project known as Project 1007 in the conveyanceof PFCs in the environment.”
Agenda:
• Who’s Who
• What/Where is Project 1007 – History and Background
• Near-Term Project Scope (FY19)
• Long-Term Project Scope TBD
![Page 3: Overview of Project 1007 and Summary of Near-Term ... · Overview of Project 1007 and Summary of Near-Term Assessment Tasks Daryl Beck, P.E., Senior Engineer - AECOM Rebecca Higgins,](https://reader034.vdocuments.us/reader034/viewer/2022042709/5f448e046d98571df963808f/html5/thumbnails/3.jpg)
Project 1007 Background and History
• Completed in 1987 as a Flood Control System for the Tri-Lakes Area (Lakes Jane, Olson, and DeMontreville) of the Valley Branch Watershed District
• System of Storm Water Pipes, Open Channels, Catchbasins, and 2 Dams to DirectWater Flow from Tri-Lakes to St. Croix River
• Project 1007 Also Utilizes a Number of Surface Water Bodies (Lakes and Creeks) toConnect to the St. Croix River
• From ~1988 to the Early 1990s, Untreated Water from a Gradient Control Well at theWashington County Landfill Discharged to Project 1007
• Raleigh Creek, which Flows Through the Former 3M Oakdale Disposal Site is Utilizedto Direct Flow as Part of Project 1007
![Page 4: Overview of Project 1007 and Summary of Near-Term ... · Overview of Project 1007 and Summary of Near-Term Assessment Tasks Daryl Beck, P.E., Senior Engineer - AECOM Rebecca Higgins,](https://reader034.vdocuments.us/reader034/viewer/2022042709/5f448e046d98571df963808f/html5/thumbnails/4.jpg)
Project 1007 Configuration
Source: A delicate balance: Flood control in the Tri-Lakes area, Valley Branch Watershed District, www.vbwd.org
![Page 5: Overview of Project 1007 and Summary of Near-Term ... · Overview of Project 1007 and Summary of Near-Term Assessment Tasks Daryl Beck, P.E., Senior Engineer - AECOM Rebecca Higgins,](https://reader034.vdocuments.us/reader034/viewer/2022042709/5f448e046d98571df963808f/html5/thumbnails/5.jpg)
PFOS Plume Overlay Across Project 1007 Layout
![Page 6: Overview of Project 1007 and Summary of Near-Term ... · Overview of Project 1007 and Summary of Near-Term Assessment Tasks Daryl Beck, P.E., Senior Engineer - AECOM Rebecca Higgins,](https://reader034.vdocuments.us/reader034/viewer/2022042709/5f448e046d98571df963808f/html5/thumbnails/6.jpg)
Washington County Landfill Inlet Piping
![Page 7: Overview of Project 1007 and Summary of Near-Term ... · Overview of Project 1007 and Summary of Near-Term Assessment Tasks Daryl Beck, P.E., Senior Engineer - AECOM Rebecca Higgins,](https://reader034.vdocuments.us/reader034/viewer/2022042709/5f448e046d98571df963808f/html5/thumbnails/7.jpg)
Raleigh Creek – Project 1007 Confluence
![Page 8: Overview of Project 1007 and Summary of Near-Term ... · Overview of Project 1007 and Summary of Near-Term Assessment Tasks Daryl Beck, P.E., Senior Engineer - AECOM Rebecca Higgins,](https://reader034.vdocuments.us/reader034/viewer/2022042709/5f448e046d98571df963808f/html5/thumbnails/8.jpg)
Eagle Point Dam
![Page 9: Overview of Project 1007 and Summary of Near-Term ... · Overview of Project 1007 and Summary of Near-Term Assessment Tasks Daryl Beck, P.E., Senior Engineer - AECOM Rebecca Higgins,](https://reader034.vdocuments.us/reader034/viewer/2022042709/5f448e046d98571df963808f/html5/thumbnails/9.jpg)
Eagle Point Dam (Cont’d)
![Page 10: Overview of Project 1007 and Summary of Near-Term ... · Overview of Project 1007 and Summary of Near-Term Assessment Tasks Daryl Beck, P.E., Senior Engineer - AECOM Rebecca Higgins,](https://reader034.vdocuments.us/reader034/viewer/2022042709/5f448e046d98571df963808f/html5/thumbnails/10.jpg)
Eagle Point Dam Outlet Pipe
![Page 11: Overview of Project 1007 and Summary of Near-Term ... · Overview of Project 1007 and Summary of Near-Term Assessment Tasks Daryl Beck, P.E., Senior Engineer - AECOM Rebecca Higgins,](https://reader034.vdocuments.us/reader034/viewer/2022042709/5f448e046d98571df963808f/html5/thumbnails/11.jpg)
West Lakeland Storage Sites
![Page 12: Overview of Project 1007 and Summary of Near-Term ... · Overview of Project 1007 and Summary of Near-Term Assessment Tasks Daryl Beck, P.E., Senior Engineer - AECOM Rebecca Higgins,](https://reader034.vdocuments.us/reader034/viewer/2022042709/5f448e046d98571df963808f/html5/thumbnails/12.jpg)
West Lakeland Storage Sites (Cont’d)
![Page 13: Overview of Project 1007 and Summary of Near-Term ... · Overview of Project 1007 and Summary of Near-Term Assessment Tasks Daryl Beck, P.E., Senior Engineer - AECOM Rebecca Higgins,](https://reader034.vdocuments.us/reader034/viewer/2022042709/5f448e046d98571df963808f/html5/thumbnails/13.jpg)
Rest Area Dam
![Page 14: Overview of Project 1007 and Summary of Near-Term ... · Overview of Project 1007 and Summary of Near-Term Assessment Tasks Daryl Beck, P.E., Senior Engineer - AECOM Rebecca Higgins,](https://reader034.vdocuments.us/reader034/viewer/2022042709/5f448e046d98571df963808f/html5/thumbnails/14.jpg)
Overall Objectives to Address Settlement
• Assess Existing and Yet Unidentified Potential PFAS Sources Contributing to PFAS Impacts in Drinking Water Aquifers and Surface Water Bodies Within and Adjacent to the Project 1007 Boundaries;
• Identify the Mechanisms by which PFAS is Entering Surface Water, Stormwater, and Groundwater as it is Conveyed by Project 1007;
• Assess the Degree to which the Project 1007 Flood Mitigation System Construction may be Contributing to PFAS Groundwater Contaminant Flow and Transport; and,
• Evaluate the Feasibility of Mitigating Ongoing PFAS Migration to Surface Water and Groundwater Receptors
![Page 15: Overview of Project 1007 and Summary of Near-Term ... · Overview of Project 1007 and Summary of Near-Term Assessment Tasks Daryl Beck, P.E., Senior Engineer - AECOM Rebecca Higgins,](https://reader034.vdocuments.us/reader034/viewer/2022042709/5f448e046d98571df963808f/html5/thumbnails/15.jpg)
Near Term Tasks in FY 19
1 - Gather, Organize, and Review Existing Environmental Sampling Data • Purpose
• Identify Gaps in Existing Data where Further Data Collection and Analysis willAssist with Future Project Decision Making
• Recommend Development of a Visual Data Presentation Platform to Aid inCommunicating Project Findings to Project Stakeholders
2 - Engineering Based Review of Project 1007 • Purpose
• Identify Components/Locations of Project 1007 where PFAS Migration fromSurface Water to Subsurface Aquifers is Occurring
![Page 16: Overview of Project 1007 and Summary of Near-Term ... · Overview of Project 1007 and Summary of Near-Term Assessment Tasks Daryl Beck, P.E., Senior Engineer - AECOM Rebecca Higgins,](https://reader034.vdocuments.us/reader034/viewer/2022042709/5f448e046d98571df963808f/html5/thumbnails/16.jpg)
Near Term Tasks in FY 19 (Cont’d)
3 - Review of Possible PFAS Sources Within and Adjacent to the Project 1007 Boundaries
• Mirror Image of 4-County PFAS Inventory Project (Superfund Project)
4 - Evaluate Surface Hydrologic and Subsurface Hydrogeologic Data
• Purpose
• Use Existing SW and GW Models
• Evaluate the SW to GW Transport Mechanisms
• Enhance Understanding of Transport Mechanisms through Future DataCollection and Modeling Efforts
![Page 17: Overview of Project 1007 and Summary of Near-Term ... · Overview of Project 1007 and Summary of Near-Term Assessment Tasks Daryl Beck, P.E., Senior Engineer - AECOM Rebecca Higgins,](https://reader034.vdocuments.us/reader034/viewer/2022042709/5f448e046d98571df963808f/html5/thumbnails/17.jpg)
Questions?