Last month, I noted that EPA’s Office of Air Quality Planning and Standards had released a draft reassessment of the particulate matter NAAQS. In a bold moment of speculation, I indicated that it would be difficult for EPA to avoid lowering the PM2.5 NAAQS to between 8.0 and 10.0 micrograms/cubic meter. Following issuance of the draft, and in order to ensure that EPA does not ignore the emerging scientific consensus,… More
Tag Archives: Clean Air Science Advisory Committee
The D.C. Circuit today largely upheld EPA’s 2015 revisions to the National Ambient Air Quality Standard for ozone. I’m not much of a prognosticator, but I pretty much called this one years ago. The Court was never going to require EPA to consider costs in setting the NAAQS – not a surprise, given that the Supreme Court concluded in Whitman v.… More
On Thursday, EPA finally released its final rule revising the ozone NAAQS to 70 ppb. I do not spend much time peering into a crystal ball, but I will go out on a limb and say that the industry challenges to the rule will fail. Just ain’t gonna happen.
The environmental group challenges pose a more interesting question. There’s a fair bit of evidence of health impacts below 70 ppb,… More
As we have noted previously, EPA has had difficulty in promulgating a revised National Ambient Air Quality Standard for ozone. Whenever the revised NAAQS is issued – and EPA is under court deadline to propose a draft by December 1, 2014 and a issue a final by October 1, 2015 – the actual standard that EPA is likely to issue is coming into focus.
Late last week,… More
On Monday, EPA released its second external review draft of an updated Policy Assessment on the national ambient air quality standard for ozone. It also released updated draft risk and exposure assessments. To no one’s surprise, the new drafts confirm support for lowering the ozone NAAQS from 75 ppb to a range of 60 ppb to 70 ppb.
Why is this not a surprise? … More
There have been so many developments recently on the air front (and I’m so far behind due to an appellate brief) that I thought I would combine a few recent items.
First, oral arguments were heard Monday on the challenges to the Bush EPA ozone NAAQS of 0.075 ppb. As I have previously noted, the Court of Appeals for the District of Columbia Circuit has made pretty plain that EPA cannot ignore the recommendations of the Clean Air Science Advisory Committee in setting the NAAQS. … More
As we noted a few weeks ago, EPA has proposed lowering the NAAQS to a range of from 0.060 ppm – 0.070 ppm. Earlier this week, EPA’s Clean Air Science Advisory Committee, or CASAC, met and endorsed EPA’s proposed range. Some CASAC members did express concern about EPA’s proposed secondary seasonal standard, intended to protect crops and forests. However, overall, the CASAC seal of approval is pretty much the end of this argument.… More