Lagoon Closure & Groundwater Investigation Railroad Facility

EWI was contracted to oversee lagoon closure and complete a groundwater investigation at former oil storage ponds at a railway facility. Two oil storage ponds were constructed in series in the 1960s to receive oily wastewater from site operations. The ponds served as settling basins and water from the ponds discharged to a nearby creek.

EWI documented the removal and off-site disposal of more than 20,000 tons of sludge and soil from the ponds area, and collected soil samples for closure. A soil remediation report was submitted to the Missouri Department of Natural Resources’ Voluntary Cleanup Program, and the agency issued a No Further Action letter for the soils at the site.

Monitoring wells were drilled and installed to bedrock around the former storage ponds.  Samples are collected using EPA-recommended low-flow purging/sampling procedures.  Sample results will be used to assess potential impacts to shallow groundwater, and determine the need for remedial activity.

PROJECT HIGHLIGHTS

Closure of two oily wastewater lagoons

Documentation of excavation and disposal of more than 20,000 tons of sludge/soil

Soils granted No Further Action status by MDNR

Monitoring well network installed to determine groundwater impacts

Groundwater samples collected using low-flow purge/sample techniques