Page-verified permit transcription

Compass IAD Datacenter

Loudoun County, Virginia

QA status VerifiedRelease dated July 29, 2026

EVIDENCE NOTE

What the public record says

A manually verified transcription of equipment groups and permit limits stated in Virginia DEQ permit 74160-3, with one-based PDF page citations. Permitted terms do not establish actual operation or emissions.

Primary sourceVirginia DEQ permit document

Virginia Department of Environmental Quality

Open original source ↗

Summary fields cite p. 1, p. 3.

What this record does not establish

The source confirms the document and its stated fields. This profile does not infer actual emissions, compliance history, operating status, facility capacity or environmental impact where those facts are not established by the cited document.

How to read the status

Issued means the agency granted the permit subject to its conditions. It does not mean every permitted unit is operating, that maximum permitted emissions occur, or that later amendments do not exist.

VERIFIED PERMIT TERMS

Equipment and limits,
kept separate from actual use.

This is a conservative transcription of reviewed permit sections, not an exhaustive legal digest. Page numbers refer to the one-based position in the linked PDF. Blank values are not zero.

Permitted equipment

2 document-defined equipment groups. Counts and per-unit ratings are transcribed; combined capacity is not calculated.

ReferenceEquipment / modelCount / ratingFuel / controlsStated operating fieldSource
five newly authorized unitsemergency engine-generator setCummins · QSK60-G15 / 2000DQKAB5 units2000 kW eachdiesel500 hourshours/year for all purposes; each unitp. 5, p. 8
75 previously permitted unitsemergency engine-generator setCummins · QSK60-G15 / 2000DQKAB75 units2000 kW eachdiesel500 hourshours/year for all purposes; each unitp. 5, p. 8

Operating scope

Authorized hours, time windows or an explicit finding that no numeric annual-hour cap was located in the reviewed sections.

ReferenceLimitBasisSource
five newly authorized units500 hours/yearhours/year for all purposes; each unitPermitted operating-hours field transcribed in the verified pilot equipment table.p. 5, p. 8
75 previously permitted units500 hours/yearhours/year for all purposes; each unitPermitted operating-hours field transcribed in the verified pilot equipment table.p. 5, p. 8

Permitted emission limits

18 pollutant, unit-group and limit rows. These are permit terms, not measured or actual emissions.

Inspect 18 transcribed limit rows
ReferencePollutantLimitBasis / scopeSource
all permitted unitsNOx as NO238.0 lb/hrhourly above 25% loadper unitp. 11
all permitted unitsNOx as NO26.6 lb/hrhourly at or below 25% loadper unitp. 11
all permitted unitsNOx as NO294.05 tpyannualcombinedp. 11
all permitted unitsCO5.09 lb/hrhourly above 25% loadper unitp. 11
all permitted unitsCO6.49 lb/hrhourly at or below 25% loadper unitp. 11
all permitted unitsCO94.05 tpyannualcombinedp. 11
all permitted unitsPM0.95 lb/hrhourly above 25% loadper unitp. 11
all permitted unitsPM1.03 lb/hrhourly at or below 25% loadper unitp. 11
all permitted unitsPM6.84 tpyannualcombinedp. 11
all permitted unitsPM101.11 lb/hrhourly above 25% loadper unitp. 11
all permitted unitsPM101.08 lb/hrhourly at or below 25% loadper unitp. 11
all permitted unitsPM107.33 tpyannualcombinedp. 11
all permitted unitsPM2.51.11 lb/hrhourly above 25% loadper unitp. 11
all permitted unitsPM2.51.08 lb/hrhourly at or below 25% loadper unitp. 11
all permitted unitsPM2.57.33 tpyannualcombinedp. 11
all permitted unitsVOC0.94 lb/hrhourly above 25% loadper unitp. 11
all permitted unitsVOC1.35 lb/hrhourly at or below 25% loadper unitp. 11
all permitted unitsVOC20.45 tpyannualcombinedp. 11

DOCUMENT HISTORY

What this document says it changes

permit amendment

Explicitly supersedes the document dated 2023-01-20.

p. 1, p. 3

QA NOTES

Ambiguity stays visible

  • Official PDF cover/permit heading checked in the manual second pass.
  • Value transcribed from official permit equipment/condition table; no totals calculated.
  • Directly stated permitted limit; not an actual emissions value.
← Return to evidence index