New 2016 TPDES Multi-Sector General Permit TXR050000

Katie Leatherwood

The Texas Pollutant Discharge Elimination System (TPDES) Multi-Sector General Permit (MSGP) TXR050000 regulates the discharge of stormwater runoff associated with industrial activities. The new 2016 MSGP for industrial facilities has been issued with an effective date of August 14, 2016.

Does this apply to you?

If you are a regulated industrial sector and you discharge stormwater associated with industrial activity into stormwater conveyances (e.g., gutters, streets, ditches) or into surface water in the state (e.g., streams, ponds, lakes, wetlands), then you are required to obtain coverage under MSGP TXR050000. If all industrial activities and materials are isolated from rain, snow, snowmelt and/or runoff by storm resistant shelters, eligibility for a conditional no exposure exclusion may be obtained.

What do you need to do?

Existing permittees have until November 14, 2016, to submit a Notice of Intent (NOI) or No Exposure Certification (NEC) form to renew their stormwater coverage, as applicable. Changes to the MSGP may also require updates to your monitoring procedures and Stormwater Pollution Prevention Plan (SWP3).

Key Changes to MSGP TXR050000 include:

New Electronic Reporting Requirements

  • NOIs, NECs, NOCs and NOTs without an electronic reporting waiver must be completed online effective September 1, 2017 (Part II, Section C., Items 2,6,7).
  • Analytical results of monitoring for compliance with Numeric Effluent Limitations must be submitted via the NetDMR reporting system effective December 21, 2016 (Part III, Section C., Item 1 and Section E., Item 6).

Changes to Monitoring Benchmark Values and Effluent Limitations

  • Added Numeric Effluent Limitations for Stormwater Discharges from Airport Deicing activities (Part V, Section S., Item 6).
  • Lowered Benchmark values for Ammonia Nitrogen, Total Suspended Solids (Sectors A, F, C, F, and H), and Biochemical Oxygen Demand (Sector T).

Changes that may affect your coverage or Stormwater Pollution Prevention Plan (SWP3)

  • Included additional facilities covered under the MSGP for Oil and Gas Facilities (Sector I).
  • “Stockpiled rail tiles” and “metal products” no longer qualify for a conditional no exposure exclusion (Part II, Section C., Item 1).
  • Records of zero rainfall events or weeks with no rain must be maintained on-site.
  • Clarified which permittees in Sector P with Petroleum Bulk Stations and Terminals require EPA permit coverage versus MSGP coverage.

For more specific information about compliance with the Texas MSGP, contact Environmental Scientist Katie Leatherwood at 817-735-7503.