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 73105-2, with one-based PDF page citations. Permitted terms do not establish actual operation or emissions.
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 set—
4 unitsNo reliable per-unit rating transcribed
diesel fuel oil—
See operating-scope table—
p. 1 ↗Machine-extracted from explicit permit prose: Becker: Attached is a permit to modify and operate four diesel engine-generators sets at your corporate data center in Herndon, Virginia, in accordance with the provisions of the C
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
1400 hours/year
ection and shall be in operation when its respective diesel engine-generator set is operating. (9 VAC 5-80-1180 D) OPERATING LIMITATIONS 4. Operating Hours - The combined operating hours for ihe diesei engine-generator sets (Ref. No.'s 1 - 4) shall not exceed 1400 hours per year, calculated monthly as the sum of each consecutive twelve month period. Compliance for the consecutive twelve month period shall be demonstrated monthly by adding the total for the most recently completed calendar monthMachine-extracted normative operating-hours statement; second review pending.
6 pollutant, unit-group and limit rows. These are permit terms, not measured or actual emissions.
Inspect 6 transcribed limit rows
Reference
Pollutant
Limit
Basis / scope
Source
diesel engine-generator sets (Ref. No.'s 1 - 4)
NOx as NO2—
24.4 tpyannual
——
p. 6 ↗Machine-extracted from a page line in an older official PDF; literal context: (Ref. No.'s 1 - 4) shall not exceed the limits specified below: Each Engine-Generator Set All Engine-Generator Sets Nitrogen Oxides 41.16 Ibs/hr 24.4 tons/yr (as N0 )
NOx as NO2—
1.56 tpyannual
——
p. 7 ↗Machine-extracted from a page line in an older official PDF; literal context: July 26, 2007 Page 5 Carbon Monoxide 4.01 Ibs/hr 1.56 tons/yr Sulfur Dioxide 11.52 Ibs/hr 8.06 tons/yr
SO2—
8.06 tpyannual
——
p. 7 ↗Machine-extracted from a page line in an older official PDF; literal context: Page 5 Carbon Monoxide 4.01 Ibs/hr 1.56 tons/yr Sulfur Dioxide 11.52 Ibs/hr 8.06 tons/yr The hourly emission rates are derived from the manufacturer's not-to-exceed data at
visible emissions—
10 percent opacityvisible
——
p. 7 ↗Machine-extracted from a page line in an older official PDF; literal context: (9 VAC 5-80-1180) 10. Visible Emission Limit - Visible emissions from each diesel engine-generator set (Ref. No.'s 1-4) shall not exceed 10% opacity except during one six-minute period in any one hour in which visible emissions shall not exceed 20% opacity as
visible emissions—
20 percent opacityvisible
——
p. 7 ↗Machine-extracted from a page line in an older official PDF; literal context: 10. Visible Emission Limit - Visible emissions from each diesel engine-generator set (Ref. No.'s 1-4) shall not exceed 10% opacity except during one six-minute period in any one hour in which visible emissions shall not exceed 20% opacity as determined by the EPA Method 9 (reference 40 CFR 60, Appendix A). This
visible emissions—
30 percent opacityvisible
——
p. 7 ↗Machine-extracted from a page line in an older official PDF; literal context: During start-up and shut-down times, visible emissions from each diesel engine- generator (Ref. No.'s 1 - 4 ) shall not exceed 20% except during one six-minute period in any one hour in which visible emissions shall not exceed 30% opacity as determined by the EPA Method 9 (reference 40 CFR 60, Appendix A).
DOCUMENT HISTORY
What this document says it changes
permit to modify and operate
No superseded-document date is asserted beyond the cited source wording.