Agency
Department of Environmental Quality
Guidance Document Information
Title Diesel Engine-Generator Set Procedure for Writing New and Modified Permits
Document ID APG-576
Summary The purpose of this document is to specify requirements for permit approval for emergency and non-emergency diesel engine-generator sets. This boilerplate is only for electrical generation engines. This boilerplate does not apply to diesel engine-generator sets subject to Prevention of Significant Deterioration (PSD) or Non-attainment permit review. The boilerplate is meant to provide a guideline for the minimum requirements of the Virginia Department of Environmental Quality (DEQ). More stringent requirements may be imposed if necessary to demonstrate compliance with National Ambient Air Quality Standards (NAAQS) or other special requirements.
Effective Date 4/9/2026
pdf View document text     Posted On 4/24/2026                 Document on Town Hall
Explanation or Citations Revised version became effective 4/9/2026.

This document applies to the following chapters
[9 VAC 5-530] Electric Generator Voluntary Demand Response General Permit
[9 VAC 5-540] Emergency Energy Generator General Permit
Public Comment Forums / Change History
Proposed Change Register Date Status
The revision to DEQ Guidance Memo APG-576 addresses presumptive Best Available Control Technology (BACT) requirements for emergency and non-emergency diesel engine-generator sets located at data center stationary sources. 3/9/2026 Forum ended on 4/8/2026 with 3 Comments.


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