Page-cited permit extraction

Digital Realty - Ashburn Campus

Loudoun Co., Virginia

QA status Machine-extractedRelease dated July 29, 2026

EVIDENCE NOTE

What the public record says

A machine-extracted candidate of equipment groups and permit limits stated in Virginia DEQ permit 73370-16, 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 ↗.

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.

MACHINE-EXTRACTED CANDIDATE

Equipment and limits,
kept separate from actual use.

These page-cited rows are machine-extracted and still require a second manual review. Verify every reused value against the linked official PDF. Page numbers refer to the one-based position in the linked PDF. Blank values are not zero.

Permitted equipment

1 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
	engine generator setCaterpillar · 3516C	73 units2250 kW each	diesel fuel oil—	See operating-scope table—	p. 5 ↗Machine-extracted from explicit permit prose: 73 bhp EG-5B None Generator 2250 ekW Caterpillar 3516C Diesel Engine 3273 bhp EG-6A None Generator 2250 ekW Caterpillar 3 516C Diesel Engine 3273 bhp EG-6B None Generator 2250 ekW Caterpillar 3516C Diesel Engine 3273 bhp EG-7A None Generator 2250 ekW Caterpillar 3 516C Diesel Engine 3273 bhp EG-7B None Generator 2250 ekW Caterpillar 3516C

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

Permitted emission limits

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

Inspect 7 transcribed limit rows

Reference	Pollutant	Limit	Basis / scope	Source
`emergency engine generator sets (Ref. Nos. EG-1A thru EG-9B), combined,`	NOx as NO2—	12.4 tpyannual	——	p. 10 ↗Machine-extracted from a page line in an older official PDF; literal context: generator sets (Ref. Nos. EG-1A thru EG-9B), combined, shall not exceed the limits specified below: Nitrogen Oxides 12.4 tons/yr (asNQz)
`emergency engine generator sets (Ref. Nos. EG-1A thru EG-9B), combined,`	NOx as NO2—	24.6 tpyannual	——	p. 10 ↗Machine-extracted from a page line in an older official PDF; literal context: Nitrogen Oxides 12.4 tons/yr (asNQz) Carbon Monoxide 24.6 tons/yr Volatile Organic 6.3 tons/yr
`emergency engine generator sets (Ref. Nos. EG-1A thru EG-9B), combined,`	PM—	2.2 tpyannual	——	p. 10 ↗Machine-extracted from a page line in an older official PDF; literal context: Volatile Organic 6.3 tons/yr Compounds PM 2.2 tons/yr 10
`emergency engine generator sets (Ref. Nos. EG-1A thru EG-9B), combined,`	visible emissions—	5 percent opacityvisible	——	p. 10 ↗Machine-extracted from a page line in an older official PDF; literal context: (9 VAC 5-50-260 and 9 VAC 5-80-1180) 12. Visible Emission Limit - Visible emissions from each emergency engine-generator set (Ref. Nos. EG-1A thru EG-9B) shall not exceed 5% opacity except during one 6-minute period in any one hour in which visible emissions shall not exceed 10% opacity as determined by EPA
`emergency engine generator sets (Ref. Nos. EG-1A thru EG-9B), combined,`	visible emissions—	10 percent opacityvisible	——	p. 10 ↗Machine-extracted from a page line in an older official PDF; literal context: 12. Visible Emission Limit - Visible emissions from each emergency engine-generator set (Ref. Nos. EG-1A thru EG-9B) shall not exceed 5% opacity except during one 6-minute period in any one hour in which visible emissions shall not exceed 10% opacity as determined by EPA Method 9 (reference 40 CFR 60, Appendix A). This condition applies at all times except
	visible emissions—	10 percent opacityvisible	——	p. 11 ↗Machine-extracted from a page line in an older official PDF; literal context: Page 9 During startup and shutdown, visible emissions from each emergency engine-generator set (Ref. Nos. EG-1A thru EG-9B) shall not exceed 10% opacity except during one 6-minute period in any one hour in which visible emissions shall not exceed 20% opacity as
	visible emissions—	20 percent opacityvisible	——	p. 11 ↗Machine-extracted from a page line in an older official PDF; literal context: During startup and shutdown, visible emissions from each emergency engine-generator set (Ref. Nos. EG-1A thru EG-9B) shall not exceed 10% opacity except during one 6-minute period in any one hour in which visible emissions shall not exceed 20% opacity as determined by EPA Method 9 (reference 40 CFR 60, Appendix A).

DOCUMENT HISTORY

What this document says it changes

permit to construct and operate

No superseded-document date is asserted beyond the cited source wording.

p. 3 ↗

QA NOTES

Ambiguity stays visible

Machine-extracted candidate. Verify every reused value against the cited official PDF page.
Prose fallback; verify equipment grouping.
Older-PDF text fallback; verify row and unit alignment.

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