DEQ is proposing changes to OAR 340, division number 246 that will make revisions to 23 standing Ambient Benchmark Concentrations, and add new benchmarks for phosgene, n-propyl bromide, and styrene. DEQ is also proposing some minor plain language edits and to add which statutes are being implemented by the rules.

Comment on this rulemaking is now closed. DEQ may modify the proposed rules based on all public comments received by the close of the public comment period on Monday, Feb. 8, 2018 at 4 p.m.
DEQ Received the following comments: