Current Projects

Search for Projects
View Projects
Project Title
by Subject/Focus Area
by Board/Committee
by Major Unit
Provisional Committee Appointments Open for Formal Public Comments
by Last Update
Meeting Information
Conflict of Interest Policy
Committee Appointment Process
  Project Information

Project Information

 Printer Friendly Version

Project Title:

Improving the Next-Generation EPA Multi-Sector General Permit for Industrial Stormwater Discharges
PIN: DELS-WSTB-16-03        

Major Unit:

Division on Earth and Life Studies

Sub Unit: Water Science and Technology Board

RSO: Johnson, Stephanie

Subject/Focus Area: Environment and Environmental Studies

Project Scope
Three permit programs under the Clean Water Act are used to regulate discharges of stormwater to receiving waters—one for municipalities, one for industrial facilities, and one for construction sites.  Of these, industrial stormwater is particularly challenging to control because of the wide range of industrial sectors that must be accounted for, each of which produces a unique suite of contaminants in stormwater.  The industrial stormwater permit program includes a small number of individual facility permits as well as general permits that are issued to groups of industries at the state and federal level.  The current Multi-Sector General Permit (MSGP) for industrial stormwater covers over 4,000 facilities nationwide and is used as a framework for dozens of similar state programs. 

The National Academies of Sciences, Engineering, and Medicine is conducting a study that will provide input to the Environmental Protection Agency as it revises its Multi-Sector General Permit (MSGP) for industrial stormwater. The National Academies' committee will: 

1.  Suggest improvements to the current MSGP benchmarking monitoring requirements.  Areas to examine could include:

• Monitoring by additional sectors not currently subject to benchmark monitoring; 

• Monitoring for additional industrial activity-related pollutants; 

• Adjusting the benchmark threshold levels; 

• Adjusting the frequency of benchmark monitoring; 

• Identifying those parameters that are the most important in indicating whether stormwater control measures are operating at the best-available-technology or best-conventional-technology (BAT/BCT) level of control; and

• New methodologies or technologies for industrial stormwater monitoring.

2.  Evaluate the feasibility of numeric retention standards (such as volumetric control standards for a percent storm size or standards based on percentage of imperviousness). 

• Are data and appropriate statistical methods available for establishing such standards as both technology-based and water quality-based numeric effluent limitations?  

• Could such retention standards provide an effective and scientifically defensible approach for establishing objective and transparent effluent limitations? 

• What are the merits and faults of retention versus discharge standards, including any risks of groundwater or surface water contamination from retained stormwater?

3.  Identify the highest priority industrial facilities/subsectors for consideration of additional discharge monitoring.  By “highest priority” EPA means those facilities/subsectors for which the development of numeric effluent limitations or reasonably standardized stormwater control measures would be most scientifically defensible (based upon sampling data quality, data gaps and the likelihood of filling them, and other data quantity/quality issues that may affect the calculation of numeric limitations).

Project Duration: 21 months    

Provide FEEDBACK on this project.

Contact the Public Access Records Office to make an inquiry, request a list of the public access file materials, or obtain a copy of the materials found in the file.

Committee Membership
Committee Membership

 Meeting 1 - 11/20/2017
 Meeting 2 - 12/18/2017
 Meeting 3 - 01/31/2018
 Meeting 4 - 02/05/2018
 Meeting 5 - 02/08/2018
 Meeting 6 - 04/26/2018
 Meeting 7 - 08/09/2018


Reports having no URL can be seen
at the Public Access Records Office