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 73370-12, 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 setDetroit Diesel	4 units1800 or 1820 kW each	diesel fuel oilselective catalytic reduction (SCR)	See operating-scope table—	p. 5 ↗Machine-extracted from explicit permit prose: otary UPS Engines, generating RPU-4 16V400/2000 N/A 3/24/05 Model 16V4000- 1800 ekW RPU-7 SCR Open G80 each Loop System Two Detroit Diesel, 2935 BHP RPU-RI Rotary UPS Engines, generating N/A N/A 3/24/05 RPU-R2 Model 16V4000- 1800 ekW G80 each Four Detroit Diesel, EG-9 2936 BHP Stand-By Generators, EG-10 generating Engine N/A N/A 3/24/05 EG-11 1820 ekW Model 16V4000- EG-12 each G81

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
	340 hours/year	s stated in Condition GC-2. (9 VAC 5-80-1180 and 9 VAC 5-50-260) 6. Operating Hours - In addition to the annual emissions limits contained in Condition 11, each engine-generator set (EG-1 A through EG-14A and EG-1 B through EG-14B) shall not operate more than 340 hours per year, calculated monthly as the sum of each consecutive 12 month period. Compliance for the consecutive 12 month period shall be demonstrated monthly by adding the total for the most recently completed calendar month to theMachine-extracted normative operating-hours statement; second review pending.	p. 71 ↗

Permitted emission limits

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

Inspect 44 transcribed limit rows

Reference	Pollutant	Limit	Basis / scope	Source
`each engine-generator set`	NOx as NO2—	4.6 lb/hrhourly	——	p. 10 ↗Machine-extracted from a page line in an older official PDF; literal context: shall not exceed the hourly limits specified below: RPU-1. 2. 5. 6. 8(G81) Nitrogen Oxides (as N0 ) 4.6 lbs/hr * with SCR operating 2
`each engine-generator set`	NOx as NO2—	5.3 lb/hrhourly	——	p. 10 ↗Machine-extracted from a page line in an older official PDF; literal context: 2 46.0 lbs/hr* without SCR operating Carbon Monoxide (CO) 5.3 lbs/hr Particulate Matter (PM ) 1.0 lbs/hr
`each engine-generator set`	PM—	1.0 lb/hrhourly	——	p. 10 ↗Machine-extracted from a page line in an older official PDF; literal context: 46.0 lbs/hr* without SCR operating Carbon Monoxide (CO) 5.3 lbs/hr Particulate Matter (PM ) 1.0 lbs/hr 10
`each engine-generator set`	SO2—	0.6 lb/hrhourly	——	p. 10 ↗Machine-extracted from a page line in an older official PDF; literal context: Particulate Matter (PM ) 1.0 lbs/hr 10 Sulfur Dioxide (S0 ) 0.6 lbs/hr 2
`each engine-generator set`	VOC—	3.6 lb/hrhourly	——	p. 10 ↗Machine-extracted from a page line in an older official PDF; literal context: 2 Volatile Organic Compounds (VOC) 3.6 lbs/hr
	NOx as NO2—	46.0 lb/hrhourly	——	p. 11 ↗Machine-extracted from a page line in an older official PDF; literal context: Page II - 7 EG-9.10.11.12(G81) Nitrogen Oxides (as N0 ) 46.0 lbs/hr without SCR operating 2
	NOx as NO2—	5.3 lb/hrhourly	——	p. 11 ↗Machine-extracted from a page line in an older official PDF; literal context: Nitrogen Oxides (as N0 ) 46.0 lbs/hr without SCR operating 2 Carbon Monoxide (CO) 5.3 lbs/hr Particulate Matter (PM ) 1.0 lbs/hr
	PM—	1.0 lb/hrhourly	——	p. 11 ↗Machine-extracted from a page line in an older official PDF; literal context: 2 Carbon Monoxide (CO) 5.3 lbs/hr Particulate Matter (PM ) 1.0 lbs/hr 10
	SO2—	0.6 lb/hrhourly	——	p. 11 ↗Machine-extracted from a page line in an older official PDF; literal context: Particulate Matter (PM ) 1.0 lbs/hr 10 Sulfur Dioxide (S0 ) 0.6 lbs/hr 2
	VOC—	3.6 lb/hrhourly	——	p. 11 ↗Machine-extracted from a page line in an older official PDF; literal context: 2 Volatile Organic Compounds (VOC) 3.6 lbs/hr RPU-3.4.7 (G80)
	NOx as NO2—	8.7 lb/hrhourly	——	p. 11 ↗Machine-extracted from a page line in an older official PDF; literal context: Compounds (VOC) 3.6 lbs/hr RPU-3.4.7 (G80) Nitrogen Oxides (as N0 ) 8.7 lbs/hr* with SCR operating 2
	NOx as NO2—	6.7 lb/hrhourly	——	p. 11 ↗Machine-extracted from a page line in an older official PDF; literal context: 2 87.4 lbs/hr * without SCR operating Carbon Monoxide (CO) 6.7 lbs/hr Particulate Matter (PM ) 1.0 lbs/hr
	VOC—	4.5 lb/hrhourly	——	p. 11 ↗Machine-extracted from a page line in an older official PDF; literal context: 2 Volatile Organic Compounds (VOC) 4.5 lbs/hr RPU-R1.RPU-R2 (G80)
	NOx as NO2—	87.4 lb/hrhourly	——	p. 11 ↗Machine-extracted from a page line in an older official PDF; literal context: Compounds (VOC) 4.5 lbs/hr RPU-R1.RPU-R2 (G80) Nitrogen Oxides (as N0 ) 87.4 lbs/hr * 2
`each diesel engine- generator sets`	NOx as NO2—	46.0 lb/hrhourly	——	p. 24 ↗Machine-extracted from a page line in an older official PDF; literal context: generator sets shall not exceed the limits specified below: RPU-1 through RPU-10. RPU-R1. RPU-R2. EG-11 through EG-15 Nitrogen Oxides (as N0 ) 46.0 lbs/hr* 2
`each diesel engine- generator sets`	NOx as NO2—	5.3 lb/hrhourly	——	p. 24 ↗Machine-extracted from a page line in an older official PDF; literal context: Nitrogen Oxides (as N0 ) 46.0 lbs/hr* 2 Carbon Monoxide (CO) 5.3 lbs/hr Particulate Matter (PM ) 1.0 lbs/hr
`each diesel engine- generator sets`	PM—	1.0 lb/hrhourly	——	p. 24 ↗Machine-extracted from a page line in an older official PDF; literal context: 2 Carbon Monoxide (CO) 5.3 lbs/hr Particulate Matter (PM ) 1.0 lbs/hr 10
`each diesel engine- generator sets`	SO2—	0.6 lb/hrhourly	——	p. 24 ↗Machine-extracted from a page line in an older official PDF; literal context: Particulate Matter (PM ) 1.0 lbs/hr 10 Sulfur Dioxide (S0 ) 0.6 lbs/hr 2
`each diesel engine- generator sets`	VOC—	3.6 lb/hrhourly	——	p. 24 ↗Machine-extracted from a page line in an older official PDF; literal context: 2 Volatile Organic Compounds (VOC) 3.6 lbs/hr *N0 - subject to change based on initial compliance test emission rate determination. If
`each diesel engine-generator sets`	PM—	0.6 lb/hrhourly	——	p. 35 ↗Machine-extracted from a page line in an older official PDF; literal context: SCR) With SCR operating W/out SCR operating Particulate Matter (PM ) 0.6 lbs/hr 0.6 lbs/hr 10
`each diesel engine-generator sets`	SO2—	0.04 lb/hrhourly	——	p. 35 ↗Machine-extracted from a page line in an older official PDF; literal context: Particulate Matter (PM ) 0.6 lbs/hr 0.6 lbs/hr 10 Sulfur Dioxide (S0 ) 0.04 lbs/hr 0.04 lbs/hr 2
`each diesel engine-generator sets`	NOx as NO2—	6.6 lb/hrhourly	——	p. 35 ↗Machine-extracted from a page line in an older official PDF; literal context: Sulfur Dioxide (S0 ) 0.04 lbs/hr 0.04 lbs/hr 2 Nitrogen Oxides (as N0 ) 6.6 lbs/hr* 65.9 lbs/hr* 2
`each diesel engine-generator sets`	NOx as NO2—	65.9 lb/hrhourly	——	p. 35 ↗Machine-extracted from a page line in an older official PDF; literal context: Sulfur Dioxide (S0 ) 0.04 lbs/hr 0.04 lbs/hr 2 Nitrogen Oxides (as N0 ) 6.6 lbs/hr* 65.9 lbs/hr* 2
`each diesel engine-generator sets`	NOx as NO2—	9.3 lb/hrhourly	——	p. 35 ↗Machine-extracted from a page line in an older official PDF; literal context: Nitrogen Oxides (as N0 ) 6.6 lbs/hr* 65.9 lbs/hr* 2 Carbon Monoxide (CO) 9.3 lbs/hr 9.3 lbs/hr Volatile Organic
`each diesel engine-generator sets`	VOC—	1.0 lb/hrhourly	——	p. 35 ↗Machine-extracted from a page line in an older official PDF; literal context: Carbon Monoxide (CO) 9.3 lbs/hr 9.3 lbs/hr Volatile Organic Compounds (VOC) 1.0 lbs/hr 1.0 lbs/hr b. Engine-generator sets (EG-1 A through EG-4A, EG-13A through EG-16A, EG-1 B through
`each diesel engine-generator sets`	PM—	0.63 lb/hrhourly	——	p. 48 ↗Machine-extracted from a page line in an older official PDF; literal context: (Units with SCR) With SCR operating W/out SCR operating Particulate Matter (PM ) 0.63 lbs/hr 0.63 lbs/hr 10
`each diesel engine-generator sets`	SO2—	0.04 lb/hrhourly	——	p. 48 ↗Machine-extracted from a page line in an older official PDF; literal context: Particulate Matter (PM ) 0.63 lbs/hr 0.63 lbs/hr 10 Sulfur Dioxide (S0 ) 0.04 lbs/hr 0.04 lbs/hr 2
`each diesel engine-generator sets`	NOx as NO2—	4.7 lb/hrhourly	——	p. 48 ↗Machine-extracted from a page line in an older official PDF; literal context: Sulfur Dioxide (S0 ) 0.04 lbs/hr 0.04 lbs/hr 2 Nitrogen Oxides (as N0 ) 4.7 lbs/hr* 47.5 lbs/hr* 2
`each diesel engine-generator sets`	NOx as NO2—	47.5 lb/hrhourly	——	p. 48 ↗Machine-extracted from a page line in an older official PDF; literal context: Sulfur Dioxide (S0 ) 0.04 lbs/hr 0.04 lbs/hr 2 Nitrogen Oxides (as N0 ) 4.7 lbs/hr* 47.5 lbs/hr* 2
`each diesel engine-generator sets`	NOx as NO2—	6.2 lb/hrhourly	——	p. 48 ↗Machine-extracted from a page line in an older official PDF; literal context: Nitrogen Oxides (as N0 ) 4.7 lbs/hr* 47.5 lbs/hr* 2 Carbon Monoxide (CO) 6.2 lbs/hr 6.2 lbs/hr Volatile Organic
`each diesel engine-generator sets`	VOC—	0.9 lb/hrhourly	——	p. 48 ↗Machine-extracted from a page line in an older official PDF; literal context: Carbon Monoxide (CO) 6.2 lbs/hr 6.2 lbs/hr Volatile Organic Compounds (VOC) 0.9 lbs/hr 0.9 lbs/hr b. Engine-generator sets (EG-1A, 2A, 1B, 2B, 15A, 15B, 16A, 16B)
`each diesel engine-generator sets`	PM10—	0.63 lb/hrhourly	——	p. 48 ↗Machine-extracted from a page line in an older official PDF; literal context: b. Engine-generator sets (EG-1A, 2A, 1B, 2B, 15A, 15B, 16A, 16B) (Units without SCR) Particulate Matter (PM10) 0.63 lbs/hr Sulfur Dioxide (S0 ) 0.04 lbs/hr
`each engine-generator set (EG-1 A through EG-12A and EG-1 B through EG12B)`	PM—	0.34 lb/hrhourly	——	p. 60 ↗Machine-extracted from a page line in an older official PDF; literal context: through EG-12A and EG-1 B through EG12B) shall not exceed the limits specified below: With SCR operating W/out SCR operating Particulate Matter (PM ) 0.34 lbs/hr 0.34 lbs/hr 10
`each engine-generator set (EG-1 A through EG-12A and EG-1 B through EG12B)`	SO2—	0.04 lb/hrhourly	——	p. 60 ↗Machine-extracted from a page line in an older official PDF; literal context: Particulate Matter (PM ) 0.34 lbs/hr 0.34 lbs/hr 10 Sulfur Dioxide (S0 ) 0.04 lbs/hr 0.04 lbs/hr 2
`each engine-generator set (EG-1 A through EG-12A and EG-1 B through EG12B)`	NOx as NO2—	4.12 lb/hrhourly	——	p. 60 ↗Machine-extracted from a page line in an older official PDF; literal context: Sulfur Dioxide (S0 ) 0.04 lbs/hr 0.04 lbs/hr 2 Nitrogen Oxides (as N0 ) 4.12 lbs/hr* 41.20 lbs/hr* 2
`each engine-generator set (EG-1 A through EG-12A and EG-1 B through EG12B)`	NOx as NO2—	41.20 lb/hrhourly	——	p. 60 ↗Machine-extracted from a page line in an older official PDF; literal context: Sulfur Dioxide (S0 ) 0.04 lbs/hr 0.04 lbs/hr 2 Nitrogen Oxides (as N0 ) 4.12 lbs/hr* 41.20 lbs/hr* 2
	NOx as NO2—	4.58 lb/hrhourly	——	p. 61 ↗Machine-extracted from a page line in an older official PDF; literal context: August 27, 2013 Page VI - 6 Carbon Monoxide (CO) 4.58 lbs/hr 4.58 lbs/hr Volatile Organic
	VOC—	1.16 lb/hrhourly	——	p. 61 ↗Machine-extracted from a page line in an older official PDF; literal context: Carbon Monoxide (CO) 4.58 lbs/hr 4.58 lbs/hr Volatile Organic Compounds (VOC) 1.16 lbs/hr 1.16 lbs/hr *N0 - subject to change based on initial compliance test emission rate determination. If
`each engine-generator set (EG-1 A through EG-14A and EG-1 B through EG-14B)`	PM—	0.31 lb/hrhourly	——	p. 72 ↗Machine-extracted from a page line in an older official PDF; literal context: through EG-14A and EG-1 B through EG-14B) shall not exceed the limits specified below: With SCR operating W/out SCR operating Particulate Matter (PM /PM . ) 0.31 lbs/hr 0.31 lbs/hr 10 2 5
`each engine-generator set (EG-1 A through EG-14A and EG-1 B through EG-14B)`	SO2—	0.04 lb/hrhourly	——	p. 72 ↗Machine-extracted from a page line in an older official PDF; literal context: Particulate Matter (PM /PM . ) 0.31 lbs/hr 0.31 lbs/hr 10 2 5 Sulfur Dioxide (S0 ) 0.04 lbs/hr 0.04 lbs/hr 2
`each engine-generator set (EG-1 A through EG-14A and EG-1 B through EG-14B)`	NOx as NO2—	4.25 lb/hrhourly	——	p. 72 ↗Machine-extracted from a page line in an older official PDF; literal context: Sulfur Dioxide (S0 ) 0.04 lbs/hr 0.04 lbs/hr 2 Nitrogen Oxides (as N0 ) 4.25 lbs/hr* 42.46 lbs/hr* 2
`each engine-generator set (EG-1 A through EG-14A and EG-1 B through EG-14B)`	NOx as NO2—	42.46 lb/hrhourly	——	p. 72 ↗Machine-extracted from a page line in an older official PDF; literal context: Sulfur Dioxide (S0 ) 0.04 lbs/hr 0.04 lbs/hr 2 Nitrogen Oxides (as N0 ) 4.25 lbs/hr* 42.46 lbs/hr* 2
`each engine-generator set (EG-1 A through EG-14A and EG-1 B through EG-14B)`	NOx as NO2—	4.75 lb/hrhourly	——	p. 72 ↗Machine-extracted from a page line in an older official PDF; literal context: Nitrogen Oxides (as N0 ) 4.25 lbs/hr* 42.46 lbs/hr* 2 Carbon Monoxide (CO) 4.75 lbs/hr 4.75 lbs/hr Volatile Organic
`each engine-generator set (EG-1 A through EG-14A and EG-1 B through EG-14B)`	VOC—	1.15 lb/hrhourly	——	p. 72 ↗Machine-extracted from a page line in an older official PDF; literal context: Carbon Monoxide (CO) 4.75 lbs/hr 4.75 lbs/hr Volatile Organic Compounds (VOC) 1.15 lbs/hr 1.15 lbs/hr

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.
Confirm whether the limit is per unit, combined, or limited to testing/maintenance.
Older-PDF text fallback; verify row and unit alignment.

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