750,000 gallons, clarifier, Flint River watershed

Call to EPD on 10/27/2018. Sent email later, same day.

Notification letter sent on 10/31/2018.

Letter says that during a scheduled annual mill outage, while a repair to seal water line was being made, an incomplete isolation allowed water from the mill water clarifier to back-flow to Flint River through intake piping and to the river. Mill water clarifier contains water from river and treatment chemicals.

Chemicals are sodium hydroxide, drewflow (polymer), coagulant, millisperse (corrosion inhibitor).

Chemical feed was stopped, prior to release, due to the water outage.

Once spill identified, valve at the clarifier was closed completely.

Once mill outage is completed, incident will be evaluated further to put measures in place to prevent a recurrence of such releases in future mill outages.