Stormwater Multi-Sector General Permit Renewal Approaching

Time to Review Your Stormwater Plans & Permits! 

Every five years the Texas Commission on Environmental Quality (TCEQ) renews the TXR050000 Stormwater General Permit. This is a Multi-Sector General Permit (MSGP) that covers a number of industries including asphalt production and quarrying. The current permit will expire August 14, 2021, and hot mix asphalt plant and quarry operations will need to update their stormwater plans to meet the proposed permit changes and renew their Notice of Intents (NOIs) within a 90-day window (August 14th – November 12th).  Hot mix asphalt plants are required to maintain a stormwater plan and permit based on the Standard Industrial Classification   code that describes the industrial activities occurring onsite. Within the stormwater permit, hot mix asphalt plants are covered under Sector D and quarries under Sector J of the permit, which requires inspections, stormwater sampling, maintaining a rain gauge and other responsibilities described in the permit. 

Based on the most significant proposed changes found in the current draft permit (which has yet to be finalized), each site’s stormwater plan will need to be updated to include the following changes:

·         Permittees will be required to post a sign or other notice of permit coverage onsite.

·         New added items will require a Notice of Change: adding or removing activities with federal effluent limitations; adding, removing, or changing the location of an outfall; stopping submittal of monitoring results of benchmarks and hazardous metals; and changing the status of a facility.

·         Added that Delegation of Signatory Authority forms must be submitted to TCEQ by using the STEERS online system.

·         The Drainage Area Site Map will be required to include latitude and longitude of outfalls.

·         Documentation of the criteria for claiming a waiver from monitoring hazardous metals must be included in the SWP3.

·         The SWP3 will be required to include a narrative for the nature of adverse condition and rain gauge reading(s). Monitoring must be conducted at the next representative rain event or in the next monitoring period, whichever comes first.

The above-mentioned changes are still in draft status, and the TCEQ is currently reviewing public comments that were submitted to the agency. It is expected that a final draft permit will be available for review in July 2021. If you need assistance with your stormwater plans and permits, call our team at:

830-249-8284.