• 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.