ECI Solves MRO's Chromium Contamination Problem With 900 Series Monitor/Controllers

An FAA Certified Part 145 Repair Station MRO facility was unable to discharge to their POTW because the hexavalent chromium Cr(VI) concentration in their wastewater stream was over the regulated discharge limit. The manager of the facility called Electroplating Consultants International in to solve the problem.  ECI provides expert consultation and technical assistance to remediate and optimize metal finishing operations throughout the United States.

Though Cr(VI) is a required micronutrient for human health, it is highly soluble and occurs naturally in animals, vegetation, and minerals. It is a regulated contaminant in drinking water because it can cause gastrointestinal, liver, and developmental toxicity in humans when ingested. The EPA Drinking Water Standard for Total Chromium, which includes Cr(III) and Cr(VI), is .1mg/L or 100 parts per billion. Because most POTWs are not equipped to remove chromium from sewage, they rely on industry compliance with effluent permit limits to prevent discharge contamination of surface waters.