Infrastructure Alternatives, Inc. (IAI) provided dredging water treatment services for this former manufactured gas plant (MGP) sediment cleanup project in Fall 2015, utilizing our Mobile Water Treatment System to process dredge material contact water or elutriate, storm water and truck wash water.
IAI’s Mobile Water Treatment System includes chemical addition, clarification, filtration and granular activated carbon (GAC) adsorption treatment units, located inside two enclosed trailers.
Four (4) additional closed top, steel tanks provided influent and effluent water storage at the Stevens Point MGP site.
A Wisconsin Pollution Discharge Elimination System (WPDES) permit was issued by Wisconsin Department of Natural Resources (WDNR) for the project. IAI was responsible for effluent sampling and monitoring, reporting, and permit compliance. IAI’s 40-hour HAZWOPER certified crew maintained an excellent safety record at the site.
Discharge Permit Limits
Treated water met WPDES permit limits throughout performance of the project, with no limit exceeedences recorded.
|Parameter||Daily Maximum Limit|
|Total Suspended Solids (TSS)||40 mg/L|
|Oil and Grease||15 mg/L|
|Poly Aromatic Hydrocarbons (PAHs)|