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

Current Arizona Construction General Permit CGP Extended

The Arizona Department of Environmental Quality has administratively continued the current statewide general permit (2008 CGP) that applies to construction sites which expires on February 28.

In accordance with a provision made in SB1289 during the 2012 Legislative session, which amended the AZPDES statute by adding ARS § 49 – 255.01(M), the CGP 2008 will be continued beyond February 28, 2013. Construction operators may continue to apply for stormwater permit coverage under the 2008 CGP after February 28, 2013, until the Department's approval and issuance of the  AZPDES 2013 Construction General Permit (2013 CGP). Approval and issuance are anticipated to occur before May 1, 2013.

Read Update On Final 2013 CGP

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

Draft MS4 Permit Revised For New Hampshire Municipalities

EPA has released a revised draft New Hapshire small “Municipal Separate Storm Sewer System” (MS4) General Permit for public review and comment. The draft general permit has been published in the Federal Register. Public comments must be submitted by April 15, 2013.

The general permit will apply to 60 municipalities located in an urbanized area as defined by the 2010 census. Regulated MS4s include traditional cities and towns, state and federally owned facilities such as universities and military bases, and the state transportation agency (NHDOT). The draft general permits will apply to all the regulated MS4s, although waivers are possible for eligible municipalities within the urbanized area where population is less than 1,000.

  The revised draft permit updates the previous general permit finalized in 2003. EPA previously released draft general permits for small MS4s in NH in 2008. EPA decided to release revised draft general permits to account for significant public comments received on the 2008 proposal, the availability of updated demographic information from the 2010 Census, and several recently approved TMDLs for various waters in New Hampshire.

Click here for more information on control measures and estimated costs associated with compliance with the draft permit, as written.

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

California Industrial General Permit Reissuance Update

The California Water Board has released an update regarding the status of the State Water Board’s reissuance of the NPDES General Permit for the Discharge of Storm Water associated with Industrial Activities (Industrial General Permit, or IGP). State Water Board staff are currently working to address the comments received on the previous draft of the Industrial General Permit released on July 16, 2012 and expect to release a final draft of the Industrial General Permit by April 2013.  This final draft will be opened for a public comment period of least 45 days. The State Water Board also plans to hold a formal workshop on May 8, 2013, where the board will accept oral comments.

After the close of the public comment period staff expect to review the new comments, revise the permit as necessary, and queue it up the revised General permit for the State Water Board’s consideration during Summer 2013.

Read a summary of the California General Industrial Permit Issued in July 2012

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

New General Stormwater Discharge Permit For Marina Operations In Ohio

The Ohio Environmental Protection Agency (OEPA) has issued an industrial stormwater discharge permit specifically to cover marinas which would otherwise need to apply for coverage under the Ohio multisector general permit (MSGP). Marinas nationwide are subject to industrial stormwater under the Transportation Sector. OEPA under General Permit No. OHRM00002 became effective on January 22, 2013. Marinas that wish to be covered under this permit are required to submit an application (“Notice of Intent, or NOI”) to OEPA.

Compliance requirements under the Marina general permit are similar in many ways to the Ohio MSGP, including:

• Requirement to prepare and implement a stormwater pollution prevention plan (SWPPP) meeting the requirements listed in the permit
• Requirement to eliminate non-stormwater discharges
• Requirement to conduct regular facility inspections
• Requirement to develop and implement an employee training program
• Requirement to conduct regular visual monitoring of stormwater discharges.

Read a summary of the Ohio Multisector General Permit

There are some important differences also:

• Marinas are allowed to discharge wash water from boat cleaning, although cleaning of engines or other oily parts is prohibited; use of detergents or other chemical cleaning agents is prohibited.
• Larger marinas (greater than 200 total slips) must conduct chemical monitoring of stormwater discharges on an annual basis.

Read a summary of Ohio general permit monitoring requirements for marinas

Read about Caltha’s new SWPPP Template and Compliance Plan Template for the Ohio marina general permit


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

Revision To Construction Stormwater Effluent Standards

EPA has announced that it will be considering revisions to selected portions of the Effluent Limitations Guidelines and Standards for the Construction and Development Point Source Category. This action will address revisions to the effluent guidelines and standards for the construction and development point source category 40 CFR 450. The C and D rule was issued on December 1, 2009 and became effective on February 1, 2010. EPA plans to revise several of the non-numeric portions of the rule in response to litigation.


Caltha LLP provides expert consulting services to public and private sector clients nationwide to address Stormwater Permitting and 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