Page-verified permit transcription

Iron Mountain Information Management LLC

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 74112-5, 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

12 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
`71 through 85`	emergency engine gen-setCummins · C3000 D6e (QSK95-G9)	15 units3000 kW each	diesel fuel oil unless noted in permitengine design / good operating practice	See operating-scope table—	p. 5 ↗
`LS-6`	emergency engine gen-setMTU · 16V2000 DS1000	1 units1000 kW each	diesel fuel oil unless noted in permitengine design / good operating practice	See operating-scope table—	p. 5 ↗
`LS-10`	emergency engine gen-setCummins · 275DQDAB (QSL9-G7 NR3)	1 units275 kW each	diesel fuel oil unless noted in permitengine design / good operating practice	See operating-scope table—	p. 5 ↗
`1 through 21`	emergency engine gen-setMTU · 20V4000 DS3000	21 units3000 kW each	diesel fuel oil unless noted in permitengine design / good operating practice	See operating-scope table—	p. 6 ↗
`22 through 45 and 51 through 70`	emergency engine gen-setCaterpillar · C175-16	44 units3000 kW each	diesel fuel oil unless noted in permitengine design / good operating practice	See operating-scope table—	p. 6 ↗
`46 through 50`	emergency engine gen-setMTU · 20V4000 DS3000	5 units3000 kW each	diesel fuel oil unless noted in permitengine design / good operating practice	See operating-scope table—	p. 6 ↗
`86 through 114`	emergency engine gen-setCaterpillar / Cummins · C175-16 or C3000 D6e	29 units3000 kW each	diesel fuel oil unless noted in permitengine design / good operating practice	See operating-scope table—	p. 6 ↗
`4C1 through 4C8 and 4R1`	emergency engine gen-setCaterpillar · 3516C	9 units2500 kW each	diesel fuel oil unless noted in permitengine design / good operating practice	See operating-scope table—	p. 6 ↗, p. 7 ↗
`4H`	emergency engine gen-setCaterpillar · C9	1 units250 kW each	diesel fuel oil unless noted in permitengine design / good operating practice	See operating-scope table—	p. 6 ↗
`LS-2`	emergency engine gen-setMTU · 12V1600 DS600	1 units667 kW each	diesel fuel oil unless noted in permitengine design / good operating practice	See operating-scope table—	p. 6 ↗
`LS-3 and LS-7`	emergency engine gen-setCaterpillar · 3512C	2 units1500 kW each	diesel fuel oil unless noted in permitengine design / good operating practice	See operating-scope table—	p. 7 ↗
`LS-8`	emergency engine gen-setCaterpillar · C32	1 units1000 kW each	diesel fuel oil unless noted in permitengine design / good operating practice	See operating-scope table—	p. 7 ↗

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
`1-21 and 46-50`	644 hours/year	combined all purposes; rolling 365 daysCondition 7.	p. 10 ↗
`1-21 and 46-50`	500 hours/year	per unit all purposes; rolling 365 daysCondition 7.	p. 10 ↗
`22-45 and 51-70`	1232 hours/year	combined all purposes; rolling 365 daysCondition 7.	p. 10 ↗
`22-45 and 51-70`	500 hours/year	per unit all purposes; rolling 365 daysCondition 7.	p. 10 ↗
`86-114`	812 hours/year	combined all purposes; rolling 365 daysCondition 7.	p. 10 ↗
`86-114`	500 hours/year	per unit all purposes; rolling 365 daysCondition 7.	p. 10 ↗
`71-85`	420 hours/year	combined all purposes; rolling 365 daysCondition 7.	p. 10 ↗
`LS-2`	24 hours/year	all purposes; rolling 365 daysCondition 7.	p. 10 ↗
`LS-3 and LS-7`	80 hours/year	combined all purposes; rolling 365 daysCondition 7.	p. 10 ↗
`LS-6`	40 hours/year	all purposes; rolling 365 daysCondition 7.	p. 10 ↗
`LS-8`	40 hours/year	all purposes; rolling 365 daysCondition 7.	p. 10 ↗
`LS-10`	40 hours/year	all purposes; rolling 365 daysCondition 7.	p. 10 ↗
`4C1-4C8 and 4R1`	216 hours/year	combined all purposes; rolling 365 daysCondition 7.	p. 10 ↗
`4H`	24 hours/year	all purposes; rolling 365 daysCondition 7.	p. 11 ↗
`all permitted engine gen-sets`	22 hours/year per unit	scheduled MCRT; rolling 365 daysCondition 8.	p. 11 ↗

Permitted emission limits

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

Inspect 68 transcribed limit rows

Reference	Pollutant	Limit	Basis / scope	Source
`1-21 and 46-50 / MTU 20V4000 DS3000`	NOx as NO2emergency	61.91 lb/hrhourly	per unitemergency operation	p. 12 ↗
`1-21 and 46-50 / MTU 20V4000 DS3000`	COemergency	10.0 lb/hrhourly	per unitemergency operation	p. 12 ↗
`1-21 and 46-50 / MTU 20V4000 DS3000`	VOCemergency	2.8 lb/hrhourly	per unitemergency operation	p. 12 ↗
`1-21 and 46-50 / MTU 20V4000 DS3000`	PM10emergency	1.33 lb/hrhourly	per unitemergency operation	p. 12 ↗
`1-21 and 46-50 / MTU 20V4000 DS3000`	PM2.5emergency	1.33 lb/hrhourly	per unitemergency operation	p. 12 ↗
`22-45 and 51-70 / Caterpillar C175-16`	NOx as NO2emergency	58.51 lb/hrhourly	per unitemergency operation	p. 12 ↗
`22-45 and 51-70 / Caterpillar C175-16`	COemergency	6.05 lb/hrhourly	per unitemergency operation	p. 12 ↗
`22-45 and 51-70 / Caterpillar C175-16`	VOCemergency	2.87 lb/hrhourly	per unitemergency operation	p. 12 ↗
`22-45 and 51-70 / Caterpillar C175-16`	PM10emergency	1.5 lb/hrhourly	per unitemergency operation	p. 12 ↗
`22-45 and 51-70 / Caterpillar C175-16`	PM2.5emergency	1.5 lb/hrhourly	per unitemergency operation	p. 12 ↗
`71-85 / Cummins C3000 D6e`	NOx as NO2emergency	49.49 lb/hrhourly	per unitemergency operation	p. 12 ↗
`71-85 / Cummins C3000 D6e`	COemergency	1.99 lb/hrhourly	per unitemergency operation	p. 12 ↗
`71-85 / Cummins C3000 D6e`	VOCemergency	0.95 lb/hrhourly	per unitemergency operation	p. 12 ↗
`71-85 / Cummins C3000 D6e`	PM10emergency	0.6 lb/hrhourly	per unitemergency operation	p. 12 ↗
`71-85 / Cummins C3000 D6e`	PM2.5emergency	0.6 lb/hrhourly	per unitemergency operation	p. 12 ↗
`LS-2 / MTU 12V1600 DS600`	NOx as NO2emergency	11.83 lb/hrhourly	per unitemergency operation	p. 12 ↗
`LS-2 / MTU 12V1600 DS600`	COemergency	1.1 lb/hrhourly	per unitemergency operation	p. 12 ↗
`LS-2 / MTU 12V1600 DS600`	VOCemergency	0.46 lb/hrhourly	per unitemergency operation	p. 12 ↗
`LS-2 / MTU 12V1600 DS600`	PM10emergency	0.22 lb/hrhourly	per unitemergency operation	p. 12 ↗
`LS-2 / MTU 12V1600 DS600`	PM2.5emergency	0.22 lb/hrhourly	per unitemergency operation	p. 12 ↗
`LS-3 and LS-7 / Caterpillar 3512C`	NOx as NO2emergency	29.18 lb/hrhourly	per unitemergency operation	p. 12 ↗
`LS-3 and LS-7 / Caterpillar 3512C`	COemergency	4.24 lb/hrhourly	per unitemergency operation	p. 12 ↗
`LS-3 and LS-7 / Caterpillar 3512C`	VOCemergency	0.81 lb/hrhourly	per unitemergency operation	p. 12 ↗
`LS-3 and LS-7 / Caterpillar 3512C`	PM10emergency	0.43 lb/hrhourly	per unitemergency operation	p. 12 ↗
`LS-3 and LS-7 / Caterpillar 3512C`	PM2.5emergency	0.43 lb/hrhourly	per unitemergency operation	p. 12 ↗
`LS-6 / MTU 16V2000 DS1000`	NOx as NO2emergency	24.23 lb/hrhourly	per unitemergency operation	p. 13 ↗
`LS-6 / MTU 16V2000 DS1000`	COemergency	2.66 lb/hrhourly	per unitemergency operation	p. 13 ↗
`LS-6 / MTU 16V2000 DS1000`	VOCemergency	0.7 lb/hrhourly	per unitemergency operation	p. 13 ↗
`LS-6 / MTU 16V2000 DS1000`	PM10emergency	0.17 lb/hrhourly	per unitemergency operation	p. 13 ↗
`LS-6 / MTU 16V2000 DS1000`	PM2.5emergency	0.17 lb/hrhourly	per unitemergency operation	p. 13 ↗
`LS-8 / Caterpillar C32`	NOx as NO2emergency	19.52 lb/hrhourly	per unitemergency operation	p. 13 ↗
`LS-8 / Caterpillar C32`	COemergency	2.78 lb/hrhourly	per unitemergency operation	p. 13 ↗
`LS-8 / Caterpillar C32`	VOCemergency	0.34 lb/hrhourly	per unitemergency operation	p. 13 ↗
`LS-8 / Caterpillar C32`	PM10emergency	0.26 lb/hrhourly	per unitemergency operation	p. 13 ↗
`LS-8 / Caterpillar C32`	PM2.5emergency	0.26 lb/hrhourly	per unitemergency operation	p. 13 ↗
`LS-10 / Cummins 275DQDAB`	NOx as NO2emergency	3.93 lb/hrhourly	per unitemergency operation	p. 13 ↗
`LS-10 / Cummins 275DQDAB`	COemergency	1.47 lb/hrhourly	per unitemergency operation	p. 13 ↗
`LS-10 / Cummins 275DQDAB`	VOCemergency	0.07 lb/hrhourly	per unitemergency operation	p. 13 ↗
`LS-10 / Cummins 275DQDAB`	PM10emergency	0.08 lb/hrhourly	per unitemergency operation	p. 13 ↗
`LS-10 / Cummins 275DQDAB`	PM2.5emergency	0.08 lb/hrhourly	per unitemergency operation	p. 13 ↗
`4C1-4C8 and 4R1 / Caterpillar 3516C`	NOx as NO2emergency	42.61 lb/hrhourly	per unitemergency operation	p. 13 ↗
`4C1-4C8 and 4R1 / Caterpillar 3516C`	COemergency	3.36 lb/hrhourly	per unitemergency operation	p. 13 ↗
`4C1-4C8 and 4R1 / Caterpillar 3516C`	VOCemergency	0.92 lb/hrhourly	per unitemergency operation	p. 13 ↗
`4C1-4C8 and 4R1 / Caterpillar 3516C`	PM10emergency	0.51 lb/hrhourly	per unitemergency operation	p. 13 ↗
`4C1-4C8 and 4R1 / Caterpillar 3516C`	PM2.5emergency	0.51 lb/hrhourly	per unitemergency operation	p. 13 ↗
`4H / Caterpillar C9`	NOx as NO2emergency	2.76 lb/hrhourly	per unitemergency operation	p. 13 ↗
`4H / Caterpillar C9`	COemergency	0.5 lb/hrhourly	per unitemergency operation	p. 13 ↗
`4H / Caterpillar C9`	VOCemergency	0.19 lb/hrhourly	per unitemergency operation	p. 13 ↗
`4H / Caterpillar C9`	PM10emergency	0.14 lb/hrhourly	per unitemergency operation	p. 13 ↗
`4H / Caterpillar C9`	PM2.5emergency	0.14 lb/hrhourly	per unitemergency operation	p. 13 ↗
`86-114 / Caterpillar C175-16`	NOx as NO2emergency	58.51 lb/hrhourly	per unitemergency operation	p. 13 ↗
`86-114 / Caterpillar C175-16`	COemergency	6.05 lb/hrhourly	per unitemergency operation	p. 13 ↗
`86-114 / Caterpillar C175-16`	VOCemergency	2.87 lb/hrhourly	per unitemergency operation	p. 13 ↗
`86-114 / Caterpillar C175-16`	PM10emergency	1.5 lb/hrhourly	per unitemergency operation	p. 13 ↗
`86-114 / Caterpillar C175-16`	PM2.5emergency	1.5 lb/hrhourly	per unitemergency operation	p. 13 ↗
`86-114 / Cummins C3000 D6e`	NOx as NO2emergency	49.49 lb/hrhourly	per unitemergency operation	p. 13 ↗
`86-114 / Cummins C3000 D6e`	COemergency	1.99 lb/hrhourly	per unitemergency operation	p. 13 ↗
`86-114 / Cummins C3000 D6e`	VOCemergency	0.95 lb/hrhourly	per unitemergency operation	p. 13 ↗
`86-114 / Cummins C3000 D6e`	PM10emergency	0.6 lb/hrhourly	per unitemergency operation	p. 13 ↗
`86-114 / Cummins C3000 D6e`	PM2.5emergency	0.6 lb/hrhourly	per unitemergency operation	p. 13 ↗
`all permitted engine gen-sets`	NOx as NO2all operations	97.02 tpyannual	all units combinedall purposes	p. 14 ↗
`all permitted engine gen-sets`	COall operations	10.51 tpyannual	all units combinedall purposes	p. 14 ↗
`all permitted engine gen-sets`	VOCall operations	4.19 tpyannual	all units combinedall purposes	p. 15 ↗
`all permitted engine gen-sets`	PM10all operations	2.18 tpyannual	all units combinedall purposes	p. 15 ↗
`all permitted engine gen-sets`	PM2.5all operations	2.18 tpyannual	all units combinedall purposes	p. 15 ↗
`all permitted engine gen-sets`	visible emissionsstated opacity limit	5 percent opacityvisible	per exhaust/sourcenormal operation	p. 15 ↗
`all permitted engine gen-sets`	visible emissionsstated opacity limit	10 percent opacityvisible	per exhaust/sourceone six-minute period in any one hour; also startup/shutdown baseline	p. 15 ↗
`all permitted engine gen-sets`	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 2024-10-16.

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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