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Remediation and Construction Services

EQ's remediation and construction group has successfully completed over 500 site assessments and remediation projects nationwide involving soil and groundwater contamination from active as well as former industrial sites.

Project from the Black Lagoon: U.S. EPA & MDEQ

This $6 million project at the Black Lagoon site in Trenton, Michigan, was the first ever remediation project awarded by the U.S. EPA’s Great Lakes National Program Office (GLNPO).  The Michigan Department of Environmental Quality (MDEQ) was a co-sponsor of this project.  The project involved dredging and cleaning up contaminated sediments in the 2-acre Black Lagoon, which is located in the Trenton Channel of the Detroit River.  The McLouth Steel Mill, which closed in 1995, was considered one of the probable sources of contamination.

The Black Lagoon is adjacent to a Trenton city park.  Homes and private boat slips are also located nearby.  The sediments were contaminated with elevated levels of mercury and other heavy metals (i.e., cadmium, chromium, copper, lead, and zinc), PCBs, PAHs, and oil and grease, according to environmental studies conducted by GLNPO, MDEQ and the U.S. Army Corps of Engineers, Detroit District.  The average sediment depth was 8-15 feet, and the total sediment volume was about 88,000 cubic yards.  The dredged sediments were disposed of in the Point Mouillee Confined Disposal Facility operated by the Army Corps’ Detroit District.

The project was performed under two separate contracts: one with GLNPO through EQ’s ERRS Region 5 contract (65% of total costs), and one with MDEQ (35% of total costs).

EQ Completes Chicago Shoreline Project

EQ completed a $10.2 million shoreline protection project along Lake Michigan in Chicago for the U.S. Army Corps of Engineers, Chicago District.  The project involved removing old crumbling limestone protection barriers from a 1,700-foot stretch along the lake and replacing them with a new multi-tiered concrete structure that could also be used as a pedestrian promenade.  The area is a half mile north of Navy Pier.  EQ removed 40,000 tons of old limestone aggregate from the site.  About 30,000 tons were crushed and reused as backfill underneath the new structure.  The remaining 10,000 tons were stored on site.

EQ then drove 40-foot steel pilings into the lake and poured 15,500 cubic yards of concrete to make the new structure, which features four 6-foot-wide walking promenades and one 40-foot-wide promenade at the shoreline.  EQ also constructed two crushed granite walking paths.