- Company: Dte Energy – Environmental Division
- Category: Soil Remediation at Three (3) Sites
- Location: Ann Arbor, Fowlerville, Grand Rapids – Michigan
- Date: 2006 to 2010
- Cost: $932,000 Combined
- Focus: Soil/Groundwater Remediation at Former Manufactured Gas Plants (MGP) & Tank Batteries
Project Summary
ERG participated in a competitive bid process for all three (3) sites and was selected not on only price but also because of our expertise and suggested approaches to complete the projects.
Michcon ● Broadway Service Center Ann Arbor ● Former MGP Site
Michcon ● Wealthy Service Center Grand Rapids ● Former MGP Site
Soil impacted with byproducts produced from historical gas processes conducted on site.
Objective – selectively remove identified hot-spots of coal-tar, an MGP byproduct.
DTE Energy ● Fowlerville Central Tank Battery ● Fowlerville ● Aboveground Tank Battery
Soil impacted by releases from several leaking aboveground storage tanks located on site.
Objective – remove impacted soil, assist with confirmatory soil sampling, and restore site.
Project Tasks
- Maximize removal of coal-tar source and other impacted materials while minimizing infiltration of accumulated groundwater
- All waste transported off-site for disposal at licensed facilities. Minimize disruption of site activities/personnel and ensure safety to immediate businesses, residences, and pedestrians, including implementation of dust and odor control measures. Remedial actions conducted per USEPA Area of Contamination (AOC) Policies, allowing movement/placement of wastes within areas of dispersed contamination.
Project Control
- Under AOC, hot spots of material can be consolidated with less contaminated media within the excavation to promote beneficial physical/chemical characteristics of the material to facilitate subsequent treatment/disposal
- Impacted materials were tested upon removal from the AOC to determine regulatory waste classification
- Soil was excavated at the MGP site to 10’ – 20’ bgl and to 25’ bgl at the Tank Battery site
- Accumulated groundwater was pumped to on-site frac tanks prior to disposal at a licensed industrial waste facility
- Air monitoring and traffic control were performed continuously to ensure public safety
- Dust suppression was achieved via misting and street sweeping
- Sand and foam were applied for odor suppression
- Upon completion of backfill operations, disturbed surfaces at each site were restored to pre-remediation conditions.
