Thursday, May 4, 2017

Minor Release of Sodium Hypochlorite


News Release from Sandy Police Dept.
Posted on FlashAlert: May 4th, 2017 4:37 PM
At 1:00 PM on Wednesday, May 3rd an estimated 100 gallons of
sodium hypochlorite was released into the environment
through a broken pipe at the Sandy Wastewater Treatment
Plant, 33400 Jarl Rd.

The pipe is buried approximately 5 to 6 feet below the
ground and evidence of the broken pipe was not visible from
the surface. The sodium hypochlorite mixed with groundwater
and traveled through a series of perforated pipes
surrounding buried structures at the treatment plant then
entering the plant's on-site storm drainage system and
eventually Tickle Creek.

Liquid Sodium Hypochlorite is a stronger concentration
(12.5% chlorine) of household bleach (5% chlorine).

Upon learning of the release treatment plant staff shut off
the broken pipe and plugged the storm-water outfall to
prevent further releases of sodium hypochlorite to Tickle
Creek. All groundwater flow from the storm drain system was
diverted to the treatment plant by 4:30 PM.

The Department of Environmental Quality (DEQ) and the Oregon
Emergency Response System (OERS) were notified and City and
contract operations staff are cooperating with these and
other state agencies (Oregon State Police, Oregon Department
of Fish and Wildlife) to assess the impacts to the
environment caused by the release.

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