DEQ: Data show elevated levels of some metals near Precision Cas - KPTV - FOX 12

DEQ: Data show elevated levels of some metals near Precision Castparts

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PORTLAND, OR (KPTV) -

Data from two additional air monitors placed near Precision Castparts in southeast Portland show levels of nickel, hexavalent chromium and arsenic that are above annual benchmarks, the Department of Environmental Quality announced Thursday. 

The levels are above health-based benchmark concentrations, but they are all below Oregon 24-hour screening levels, so there is no indication of an immediate public health threat, according to the Oregon Health Authority. 
 
The data includes results from an air monitor set up northeast of the Precision Castparts facility at Southeast 52nd Avenue and Southeast Harney Drive and a monitor located south of the facility at the Springwater Trail. 

At the Springwater Trail monitor, nickel concentrations were more than 3.4 times above the benchmark and 1.2 times above the benchmark at the Southeast 52nd Avenue and Southeast Harney monitor. Hexavalent chromium concentrations were more than 4.1 times above the benchmark at the Springwater Trail monitor and 1.5 times above the benchmark at the Southeast 52nd Avenue and Southeast Harney monitor. 
 
According to the DEQ, the arsenic levels were generally above the health-based quality goal (ambient benchmark concentration) for the metal but were still within levels found in urban environments. 

The DEQ says the data were analyzed to understand the impacts of additional air pollution controls that were installed by Precision Castparts in May. Arsenic, cobalt, lead and nickel show decreases as a result of the controls, but hexavalent chromium showed no decrease. 

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