Final Arizona Construction General Permit Released

The Arizona Department of Environmental Quality (ADEQ) has finalized the new 2013 Construction General Permit (CGP) which will become effective Monday, June 3, 2013. According to ADEQ, existing operators covered by the 2008 CGP are required to update their SWPPPs and be in compliance with the new permit as of that date, but to not need to reapply for permit coverage. Beginning on that date, operators of new projects requiring coverage must apply under the new permit. ADEQ expects to send an update and reminder approximately two weeks before the implementation date.

Click here for information on how the ADEQ 2013 CGP implements USEPA’s 2009 C&D rule including non-numeric limits.

Caltha LLP provides expert consulting services to public and private sector clients in Arizona and  nationwide to address Stormwater Permitting & Regulatory Support, Stormwater Pollution Prevention Plans (SWPPP), Stormwater Monitoring and Stormwater Training.

For further information contact Caltha LLP at
info@calthacompany.com or Caltha LLP Website

EPA Proposes Revision To Discharge Requirements For Construction and Development Sources

Pursuant to a settlement agreement to resolve litigation, US EPA is proposing changes to the effluent limitations guidelines and standards for the Construction and Development point source category. This proposed rule would withdraw the numeric discharge standards, which are currently stayed, and change several of the non-numeric provisions of the existing rule. Comments on the proposed rule are being accepted through May 31, 2013. The revisions to 40 CFR part 450 now being proposed by EPA consist of the following three elements:

1. Addition of a definition of "infeasible" consistent with the preamble to the 2009 final rule and 2012 CGP;
2. Revisions to the effluent limitations reflecting the best practicable control technology currently available (BPT), effluent limitations reflecting the best available technology economically achievable (BAT), effluent limitations reflecting the best conventional pollutant control technology (BCT), and the new source performance standards reflecting the best available demonstrated control technology (NSPS) found at 40 CFR 450.21, 450,22, 450.23 and 450.24, respectively; and
3. Withdrawing the numeric turbidity effluent limitation and monitoring requirements found at 40 CFR 450.22(a) and 450.22(b) and reserving these subparts.

Click here for further information on the history of rulemaking for this effluent standard.


Caltha LLP provides expert consulting services to public and private sector clients nationwide to address Stormwater Permitting & Regulatory Support, Stormwater Pollution Prevention Plans (SWPPP), Stormwater Monitoring and Stormwater Training. For further information contact Caltha LLP at
info@calthacompany.com or Caltha LLP Website