Page-verified permit transcription

Amazon Data Services (IAD-130, IAD-131, IAD-313 and DCA-072)

Prince William 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 74171-4, 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. 3 ↗, p. 4 ↗.

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

6 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 through 47`	emergency engine gen-setCaterpillar · 3516C-HD	47 units2500 kW each	diesel fuel oil unless noted in permitengine design	See operating-scope table—	p. 5 ↗
`T-1 and T-2`	emergency engine gen-setCaterpillar · 3516C	2 units2000 kW each	diesel fuel oil unless noted in permitengine design	See operating-scope table—	p. 5 ↗
`48 through 65`	non-emergency engine gen-setCummins · QSK78-G36 (FR60718)	18 units2750 kW each	diesel fuel oil unless noted in permitSCR and cDPF	See operating-scope table—	p. 5 ↗
`66 through 87`	non-emergency engine gen-setCaterpillar · 3516E	22 units2750 kW each	diesel fuel oil unless noted in permitSCR and cDPF	See operating-scope table—	p. 5 ↗
`88`	emergency engine gen-setCummins · QST30-G5 (FR5271)	1 units750 kW each	diesel fuel oil unless noted in permitnone	See operating-scope table—	p. 5 ↗
`89`	emergency engine gen-setCaterpillar · 3512C	1 units1600 kW each	diesel fuel oil unless noted in permitnone	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
`1-47, T-1, T-2`	32 hours/year per unit	scheduled MCRTCondition 11.	p. 10 ↗
`88 and 89`	35 hours/year per unit	scheduled MCRTCondition 11.	p. 10 ↗
`1-47,88,89,T-1,T-2`	500 hours/year per unit	all emergency purposes; rolling consecutive 12 monthsCondition 11.	p. 10 ↗
`48 through 87`	No numeric value stated	no numeric annual hour cap located for non-emergency unitsOperation bounded by fuel-throughput equation and other conditions; no numeric hour cap transcribed.	p. 12 ↗

Permitted emission limits

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

Inspect 54 transcribed limit rows

Reference	Pollutant	Limit	Basis / scope	Source
`1-47 / Caterpillar 3516C-HD`	NOx as NO2emergency	48.06 lb/hrhourly	per unitemergency operation	p. 13 ↗
`1-47 / Caterpillar 3516C-HD`	PMemergency	0.4 lb/hrhourly	per unitemergency operation	p. 13 ↗
`1-47 / Caterpillar 3516C-HD`	PM10emergency	0.4 lb/hrhourly	per unitemergency operation	p. 13 ↗
`1-47 / Caterpillar 3516C-HD`	PM2.5emergency	0.4 lb/hrhourly	per unitemergency operation	p. 13 ↗
`1-47 / Caterpillar 3516C-HD`	COemergency	6.09 lb/hrhourly	per unitemergency operation	p. 13 ↗
`1-47 / Caterpillar 3516C-HD`	VOCemergency	1.21 lb/hrhourly	per unitemergency operation	p. 13 ↗
`1-47 / Caterpillar 3516C-HD`	SO2emergency	0.04 lb/hrhourly	per unitemergency operation	p. 13 ↗
`88 / Cummins QST30-G5`	NOx as NO2emergency	11.88 lb/hrhourly	per unitemergency operation	p. 13 ↗
`88 / Cummins QST30-G5`	PMemergency	0.47 lb/hrhourly	per unitemergency operation	p. 13 ↗
`88 / Cummins QST30-G5`	PM10emergency	0.47 lb/hrhourly	per unitemergency operation	p. 13 ↗
`88 / Cummins QST30-G5`	PM2.5emergency	0.47 lb/hrhourly	per unitemergency operation	p. 13 ↗
`88 / Cummins QST30-G5`	COemergency	2.37 lb/hrhourly	per unitemergency operation	p. 13 ↗
`88 / Cummins QST30-G5`	VOCemergency	0.35 lb/hrhourly	per unitemergency operation	p. 13 ↗
`88 / Cummins QST30-G5`	SO2emergency	0.01 lb/hrhourly	per unitemergency operation	p. 13 ↗
`89 / Caterpillar 3512C`	NOx as NO2emergency	30.75 lb/hrhourly	per unitemergency operation	p. 13 ↗
`89 / Caterpillar 3512C`	PMemergency	0.44 lb/hrhourly	per unitemergency operation	p. 13 ↗
`89 / Caterpillar 3512C`	PM10emergency	0.44 lb/hrhourly	per unitemergency operation	p. 13 ↗
`89 / Caterpillar 3512C`	PM2.5emergency	0.44 lb/hrhourly	per unitemergency operation	p. 13 ↗
`89 / Caterpillar 3512C`	COemergency	5.78 lb/hrhourly	per unitemergency operation	p. 13 ↗
`89 / Caterpillar 3512C`	VOCemergency	0.83 lb/hrhourly	per unitemergency operation	p. 13 ↗
`89 / Caterpillar 3512C`	SO2emergency	0.02 lb/hrhourly	per unitemergency operation	p. 13 ↗
`T-1,T-2 / Caterpillar 3516C`	NOx as NO2emergency	38.85 lb/hrhourly	per unitemergency operation	p. 13 ↗
`T-1,T-2 / Caterpillar 3516C`	PMemergency	0.57 lb/hrhourly	per unitemergency operation	p. 13 ↗
`T-1,T-2 / Caterpillar 3516C`	PM10emergency	0.57 lb/hrhourly	per unitemergency operation	p. 13 ↗
`T-1,T-2 / Caterpillar 3516C`	PM2.5emergency	0.57 lb/hrhourly	per unitemergency operation	p. 13 ↗
`T-1,T-2 / Caterpillar 3516C`	COemergency	3.92 lb/hrhourly	per unitemergency operation	p. 13 ↗
`T-1,T-2 / Caterpillar 3516C`	VOCemergency	1.14 lb/hrhourly	per unitemergency operation	p. 13 ↗
`T-1,T-2 / Caterpillar 3516C`	SO2emergency	0.03 lb/hrhourly	per unitemergency operation	p. 13 ↗
`48-65 / Cummins QSK78-G36`	NOx as NO2SCR controlled	4.46 lb/hrhourly	per unitnon-emergency operation	p. 14 ↗
`48-65 / Cummins QSK78-G36`	NOx as NO2uncontrolled	51.51 lb/hrhourly	per unitnon-emergency operation	p. 14 ↗
`48-65 / Cummins QSK78-G36`	PMcDPF controlled	0.14 lb/hrhourly	per unitnon-emergency operation	p. 14 ↗
`48-65 / Cummins QSK78-G36`	PM10cDPF controlled	0.14 lb/hrhourly	per unitnon-emergency operation	p. 14 ↗
`48-65 / Cummins QSK78-G36`	PM2.5cDPF controlled	0.14 lb/hrhourly	per unitnon-emergency operation	p. 14 ↗
`48-65 / Cummins QSK78-G36`	COcDPF controlled	0.52 lb/hrhourly	per unitnon-emergency operation	p. 14 ↗
`48-65 / Cummins QSK78-G36`	VOCcDPF controlled	0.48 lb/hrhourly	per unitnon-emergency operation	p. 14 ↗
`48-65 / Cummins QSK78-G36`	SO2stated limit	0.04 lb/hrhourly	per unitnon-emergency operation	p. 14 ↗
`66-87 / Caterpillar 3516E`	NOx as NO2SCR controlled	4.46 lb/hrhourly	per unitnon-emergency operation	p. 14 ↗
`66-87 / Caterpillar 3516E`	NOx as NO2uncontrolled	53.48 lb/hrhourly	per unitnon-emergency operation	p. 14 ↗
`66-87 / Caterpillar 3516E`	PMcDPF controlled	0.18 lb/hrhourly	per unitnon-emergency operation	p. 14 ↗
`66-87 / Caterpillar 3516E`	PM10cDPF controlled	0.18 lb/hrhourly	per unitnon-emergency operation	p. 14 ↗
`66-87 / Caterpillar 3516E`	PM2.5cDPF controlled	0.18 lb/hrhourly	per unitnon-emergency operation	p. 14 ↗
`66-87 / Caterpillar 3516E`	COcDPF controlled	2.05 lb/hrhourly	per unitnon-emergency operation	p. 14 ↗
`66-87 / Caterpillar 3516E`	VOCcDPF controlled	0.45 lb/hrhourly	per unitnon-emergency operation	p. 14 ↗
`66-87 / Caterpillar 3516E`	SO2stated limit	0.04 lb/hrhourly	per unitnon-emergency operation	p. 14 ↗
`1 through 89, T-1 and T-2`	NOx as NO2all operations	96.03 tpyannual	all units combinedall purposes	p. 14 ↗
`1 through 89, T-1 and T-2`	PMall operations	4.37 tpyannual	all units combinedall purposes	p. 14 ↗
`1 through 89, T-1 and T-2`	PM10all operations	4.37 tpyannual	all units combinedall purposes	p. 14 ↗
`1 through 89, T-1 and T-2`	PM2.5all operations	4.37 tpyannual	all units combinedall purposes	p. 14 ↗
`1 through 89, T-1 and T-2`	COall operations	55.99 tpyannual	all units combinedall purposes	p. 14 ↗
`1 through 89, T-1 and T-2`	VOCall operations	30.23 tpyannual	all units combinedall purposes	p. 14 ↗
`1 through 89, T-1 and T-2`	SO2all operations	0.87 tpyannual	all units combinedall purposes	p. 14 ↗
`1 through 89, T-1 and T-2`	visible emissionsstated opacity limit	5 percent opacityvisible	per exhaust/sourcenormal operation	p. 15 ↗
`1 through 89, T-1 and T-2`	visible emissionsstated opacity limit	10 percent opacityvisible	per exhaust/sourceemergency one six-minute exception; also startup/shutdown baseline	p. 15 ↗
`1 through 89, T-1 and T-2`	visible emissionsstated opacity limit	20 percent opacityvisible	per exhaust/sourceone six-minute period in any one hour during startup/shutdown	p. 15 ↗

DOCUMENT HISTORY

What this document says it changes

combined minor NSR permit

Explicitly supersedes the document dated 2023-01-27.

p. 3 ↗, p. 4 ↗

QA NOTES

Ambiguity stays visible

Transcribed from exact official PDF; source page is 1-based PDF position.

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