Page-verified permit transcription

Amazon Data Services Inc IAD-120/121/122

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 74205-4, 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

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

Reference	Equipment / model	Count / rating	Fuel / controls	Stated operating field	Source
`1-52`	emergency engine-generator setCaterpillar · 3516C-HD	52 units2500 kW each	diesel—	32 hourshours/year scheduled maintenance/readiness testing; each unit	p. 5 ↗, p. 8 ↗
`53-54`	emergency engine-generator setCaterpillar · C18	2 units600 kW each	diesel—	32 hourshours/year scheduled maintenance/readiness testing; each unit	p. 5 ↗, p. 8 ↗
`55`	emergency engine-generator setCaterpillar · 3512C	1 units1600 kW each	diesel—	See operating-scope table—	p. 5 ↗
`T1-T2`	emergency engine-generator setCaterpillar · 3516C	2 units2000 kW each	diesel—	See operating-scope table—	p. 5 ↗

Operating scope

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

Reference	Limit	Basis	Source
`1-52`	32 hours/year	hours/year scheduled maintenance/readiness testing; each unitPermitted operating-hours field transcribed in the verified pilot equipment table.	p. 5 ↗, p. 8 ↗
`53-54`	32 hours/year	hours/year scheduled maintenance/readiness testing; each unitPermitted operating-hours field transcribed in the verified pilot equipment table.	p. 5 ↗, p. 8 ↗

Permitted emission limits

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

Inspect 5 transcribed limit rows

Reference	Pollutant	Limit	Basis / scope	Source
`1-52`	NOx as NO2—	48.06 lb/hrhourly	per unit—	p. 10 ↗
`1-52`	CO—	6.09 lb/hrhourly	per unit—	p. 10 ↗
`1-52`	VOC—	1.21 lb/hrhourly	per unit—	p. 10 ↗
`1-52`	PM10—	0.4 lb/hrhourly	per unit—	p. 10 ↗
`1-52`	PM2.5—	0.4 lb/hrhourly	per unit—	p. 10 ↗

DOCUMENT HISTORY

What this document says it changes

minor amendment

Explicitly supersedes the document dated 2024-11-15.

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.

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