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Indiana Department of Environmental Management

Compliance and Technical Assistance Program


The Compliance Technical Assistance Program (CTAP) is your one-stop shop for environmental regulatory compliance needs. Staff with experience in all environmental programs are ready to provide technical and confidential compliance assistance on a wide array of environmental topics.

Upcoming Compliance Due Dates

  • September 15:
    • Third quarter payment due for NPDES Annual Bill, if paying in quarterly installments.
    • Underground Storage Tank (UST) fee of third payment due if paying the fee in four installments.
  • September 28:
    • Annual Green House Gas (GHG) Reports are due to U.S. EPA if your facility is part of the 41 source categories in 40 CFR 98 (otherwise the report is due March 31)
      • Note: There is no need to submit the GHG Report to IDEM.
  • October 15:
  • October 20:
    • Hazardous Waste Disposal Fee (State Form 46244, available on the IDEM Forms page) due for the prior quarter’s activity for disposal of hazardous waste onsite through underground injection or by other methods.
  • October 28:
    • Quarterly Non-Compliance Report due for delegated water Pretreatment Programs (unless otherwise permitted to submit report in November).
  • October 30:
    • Air Quarterly Deviation and Compliance Monitoring Report due for July through September. Check your permit to determine if you are on a quarterly or semi-annual reporting schedule.
    • Quarterly Air Permit reports (e.g., usage reports) due for July through September.
  • October 31:

Additional Compliance Due Dates

Featured Topics

Vacatur of Portions of RICE NESHAP and NSPS Provisions for Emergency Engines

Owners of emergency use only engines should be aware of a recent court case (2015) that may affect the emergency use only status if they are participating in an emergency demand response program or operate the engine in order to mitigate voltage/frequency fluctuations effective as of May 2016. Guidance on Vacatur of RICE NESHAP and NSPS Provisions for Emergency Engines [PDF].

Solvents in the Workplace

The U.S. Environmental Protection Agency has released a new guidance document, entitled, Solvents in the Workplace – How to Determine If They Are Hazardous Waste [PDF].

Solvents are used in the workplace for many different purposes and once they are spent or left unused and destined to be disposed, making hazardous waste determinations can sometimes be a challenging task. This e-enterprise user-friendly guidance walks through a series of questions and answers that will help a facility determine if it may have generated a hazardous waste solvent. The guidance provides information to assist a facility in recycling or reusing its solvents which could reduce its waste management costs and the nation’s need for virgin materials. Also, at the end of the document, there are a number of questions the EPA has answered through the years involving hazardous waste solvents.

Additional Featured Topics