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Benchmark Monitoring Data Analyses under the Multi-Sector General Permit

Benchmark monitoring analyses submission deadline is March 31 of each calendar year.

UPDATEResults of data analyses must be submitted using the online NetDMR Exit the TCEQ system. The online NetDMR system will be available to Multi-Sector General Permit (MSGP) permittees in December 2021.

*Note that not all sectors are required to conduct benchmark monitoring. Those sectors which are required to conduct benchmark monitoring are listed in Part IV of the (MSGP) (TXR050000 Adobe Acrobat PDF Document ) for stormwater discharges from certain industrial activities. Please refer to Parts IV and V of the MSGP to determine your specific requirements.

What am I supposed to submit?

For those sectors required to conduct benchmark monitoring under the MSGP:

Semi-annual sampling must be conducted at least once during the first full monitoring period (January through June or July through December) following permit issuance, and then once during each monitoring period for the term of the general permit.
Results of analyses for sampling shall be submitted to the TCEQ before March 31st of each year.
Samples should be collected from internal or external outfalls where BMPs are installed.
The reported values shall be the average yearly result of analysis for each specific pollutant discharged under a specific Standard Industrial Classification (SIC) code or industrial activity code.