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General Discharge Permit

General Permit for Discharges from Tanks, Pipes, and Other Containment Structures at Facilities other than Oil Terminals
Maryland General Permit No. 11-HT

Important Announcement - Tentative Determination Published for General Discharge Permit 17-HT 

The Department has published its tentative determination for the updated renewal of General Permit for Discharges from Tanks, Pipes, Other Liquid Containment Structures, Dewatering Activities, and Groundwater Remediation (Maryland General Permit No. 17-HT).  The Department will hold a public hearing concerning the tentative determination on Thursday, September 6, 2018 from 1 to 3 p.m. in the Aqua and Terra Conference Rooms at the Maryland Department of the Environment, 1800 Washington Blvd., Baltimore, MD 21230.

Persons who wish to present information regarding the tentative determination may speak at the public hearing, submit written comments at the public hearing, and/or submit a written statement​ to the Department no later than 5:00 p.m. on Thursday, September 13, 2018.  All comments will be considered in making a final determination.  

Copies of the public notice, draft permit, and draft fact sheet are available for view by clocking the links below: ​

 Any questions of comments regarding this modification should be directed to Michael Richardson using the following contact information: 

  • ​Mail:     Maryland Department of the Environment                                                                                                 Water and Science Administration                                                                                                             1800 Washington Blvd., Suite 455                                                                                                             Baltimore, MD 21230-1708  
  • Email:  
  • Phone:  (410) 537-3323 (between 8 a.m. and 5 p.m., Monday through Friday)

Until the new 17-HT permit is final and issued, the 11-HT permit is administratively extended beyond its expiration date of February 28, 2017. The terms and eligibility requirements under that permit continue in full force and effect until a final determination is issued on the 17-HT permit. Those registered under the 11-HT permit DO NOT have to submit for renewal at this time, but should continue following the terms of your 11-HT registration. Current permit registrants will continue to receive notification letters regarding progress of the renewal, including notification of a deadline to renew. This webpage will also be updated regularly to reflect current status.


11-HT Permit Information (Existing Permit)

The 11-HT general permit became effective on March 1, 2012.


  • General Permit No. 11-HT for Discharges from tanks, pipes and other containment structures at facilities other than oil terminals


Supplemental Information

Contact Info

If you have additional questions or would like more information, please contact the Wastewater Permits Program, Industrial & General Discharge Permits Division at 410-537-3323.


Additional Information and Related Links