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Coombs Road Preliminary Site Investigation

Hampton, Lenzini and Renwick, Inc. (HLR) completed a Preliminary Site Investigation (PSI) to evaluate the risks two Recognized Environmental Conditions (RECs) would have on the Coombs Road Bridge over the Dakota, Minnesota & Eastern (DM&E) Railroad superstructure rehabilitation.

The objective of the Preliminary Site Investigation was to evaluate the soil conditions for contaminants from the two RECs found from the Preliminary Environmental Site Assessment (PESA), completed in February 2017. Three soil boring samples were collected. Two that were representative of the impacts the railroad would have on the rehabilitation to four feet deep and one that was representative of the impacts the Leaking Underground Storage Tank (LUST) site could have on the project to ten feet deep. The two railroad soil samples were tested for VOCs, Semi-VOCs, PNAs, Total Metals, PCBs and pH. The one LUST soil sample was tested for BTEX, MTBE, pH, and Lead. The subsurface results were compared to Maximum Allowable Concentrations (MACs) and Tier 1 Remediation Objectives (ROs).

Our team completed the PSI, including site investigation, lab result analysis, exhibits, and CCDD 663 forms in the expected time frame of one month.

Client

Elgin Township

Location

0.2 miles north of Highland Avenue in Elgin Township

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