Memos

Downloads folder for Historical Memos

This is a list of natural gas-fired turbine projects authorized by TCEQ that generate 20 megawatts (MW) or more greater electric output. It shows their permit numbers, turbine models, number of turbines, power output per turbine and site wide in MW, emissions controls, mode of operation (simple cycle [SC], combined cycle [CC], or cogeneration), and BACT emission concentrations for NOx and CO.

TCEQ Interoffice Memo - Use of permits by rule for Proprietary On-Site Sewage Facility (OSSF) treatment systems authorized under 30 TAC Chapter 285 - June, 2025

This document is part of the NSR Policy and Guidance Database

TCEQ - NSPS OOOO-series-implementation-guidance-memo

EPA - Merps Data Distribution and Errata Memo 02-23-2017

From EPA: Clarification on the Use of AERMOD Dispersion Modeling for Demonstrating Compliance with the NO2 National Ambient Air Quality Standard

This document may be of assistance in applying the New Source Review (NSR) air permitting regulations including the Prevention of Significant Deterioration (PSD) requirements. This document is part of the NSR Policy & Guidance Database. Some documents in t