GEMG personnel have directed the overall compliance program for the storm water outfall.† Services have included development of a remediation plan to eliminate chemical constituents from the discharge, overall conceptual development of the remediation program including treatability studies, and detention basin design.† GEMG personnel also directed the services of a design subconsultant and offered alternative water use scenarios for the storm water that would eliminate the direct discharge.† GEMG personnel have provided oversight for construction observation and coordination between the construction contractor and the client.
GEMG personnel designed and constructed a cover system for one side of the property at a brass foundry in Michigan.† The design was part of a Superfund Action lead by the State.† The cover was built on a 7-acre area bounded on the east by a river.† The purpose of this cover was to isolate soils that contained elevated lead concentrations.† The cover reduced infiltration of 31.5 inches of annual rainfall to 3.7 inches.† To facilitate drainage away from the covered area, a perimeter drainage channel was constructed to prevent run-on from off-site sources.† The cover reduced client costs by allowing lead contaminated soil to be left in-place.
For the soils unit, GEMG personnel have developed a remedial investigation work plan which was approved by the State of Michigan with minimal comments.† GEMG personnel then implemented the work plan and repaired a Report of Results (ROR) and Remedial Action Plan (RAP) for the site.† The ROR and RAP currently are being reviewed by MDNR.† GEMG personnel have met the requirements of the consent decree while minimizing costs to the client.† GEMG personnel developed the RAP using the Phase I ROR results rather than proceed to a Phase II sampling program.† The contaminants of concern at this site include metals and volatile organics.† GEMG personnel have prepared remedial design documents for implementation of the proposed remedy.† The Notice of Completion was issued by the state in Fall 1999.
Prior to the consent decree, GEMG personnel conducted a compliance audit at the facility as part of a company process.† The audit of this facility included a process review and a review of environmental records at the site with local and state agencies.† The audit was used to update environmental records and correct any deficiencies found.
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Gregory Gulch #1 Mine Tailings RemediationóCERCLA Site
GEMG personnel prepared remedial design and remedial action documents for the Gregory Gulch #1 mine tailings site for the client that was part of the Clear Creek/Central City Superfund Site.† The remediation documents were approved by the United State Environmental Protection Agency and construction began in the summer of 1998.
The remediation consisted of excavating impacted soils and disposal at an approved landfill.† The site was graded for slope stability and rip rap placed along the stream channel to prevent erosion.† The upper slopes of the site were seeded with native grasses.† The final report was submitted to and approved by the EPA in March 1999.
Gregory Gulch #2 Mine Tailings RemediationóCERCLA Site
GEMG personnel prepared remedial design and remedial action documents for the Gregory Gulch #2 mine tailings site for the client that was part of the Clear Creek/Central City Superfund Site.† The remediation documents were approved by the United State Environmental Protection Agency and construction began in the spring of 1999.
The remediation consisted of excavating impacted soils and disposal at an approved landfill.† The site was graded for slope stability along the stream channel to prevent erosion.† Mine tailings and a mine shaft were left onsite because of stability issues with the roadway.† The remaining mine tailings were covered with clean soil and stabilized for future development or seeding in the spring of 2000.† The final report was submitted to and approved by the EPA in September 1999.