Page-verified permit transcription

Equinix LLC (DC-21/DC-22)

Loudoun 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 74189-5, 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

6 document-defined equipment groups. Counts and per-unit ratings are transcribed; combined capacity is not calculated.

ReferenceEquipment / modelCount / ratingFuel / controlsStated operating fieldSource
DC-21-3350 newly permittedemergency engine-generator setCummins · QSK95-G153 units3350 kW eachdiesel0.0015% by weight (15 ppm)500 hourshours/year for all purposes; no single unitp. 5, p. 9Capacity described as de-rated in permit.
DC-21-3350 previously permittedemergency engine-generator setCummins · QSK95-G153 units3350 kW eachdiesel0.0015% by weight (15 ppm)500 hourshours/year for all purposes; no single unitp. 5, p. 9Capacity described as de-rated in permit.
DC-21-3250emergency engine-generator setCummins · QSK95-G123 units3250 kW eachdiesel0.0015% by weight (15 ppm)500 hourshours/year for all purposes; no single unitp. 5, p. 9Capacity described as de-rated in permit.
DC-21Zemergency engine-generator setCummins · QSX15-G91 units500 kW eachdiesel0.0015% by weight (15 ppm)500 hourshours/year for all purposes; no single unitp. 5, p. 9
DC-22non-emergency engine-generator setKohler · KD103V2026 units4000 kW eachdieselSCR (ecoCUBE)See operating-scope tablep. 5, p. 10
DC-22Zemergency engine-generator setKohler · KD27V121 units800 kW eachdiesel0.0015% by weight (15 ppm)See operating-scope tablep. 5, p. 10

Operating scope

Authorized hours, time windows or an explicit finding that no numeric annual-hour cap was located in the reviewed sections.

ReferenceLimitBasisSource
DC-21-3350 newly permitted500 hours/yearhours/year for all purposes; no single unitPermitted operating-hours field transcribed in the verified pilot equipment table.p. 5, p. 9
DC-21-3350 previously permitted500 hours/yearhours/year for all purposes; no single unitPermitted operating-hours field transcribed in the verified pilot equipment table.p. 5, p. 9
DC-21-3250500 hours/yearhours/year for all purposes; no single unitPermitted operating-hours field transcribed in the verified pilot equipment table.p. 5, p. 9
DC-21Z500 hours/yearhours/year for all purposes; no single unitPermitted operating-hours field transcribed in the verified pilot equipment table.p. 5, p. 9

Permitted emission limits

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

Inspect 7 transcribed limit rows
ReferencePollutantLimitBasis / scopeSource
DC-21-3250NOx as NO260.63 lb/hrhourlyper unitp. 12
DC-21-3350NOx as NO263.82 lb/hrhourlyper unitp. 12
DC-21ZNOx as NO27.15 lb/hrhourlyper unitp. 12
DC-22ZNOx as NO215.8 lb/hrhourlyper unitp. 12
DC-22NOx as NO2uncontrolled by SCR75.66 lb/hrhourlyper unitp. 12
DC-22NOx as NO2controlled by SCR7.61 lb/hrhourlyper unitp. 12
DC-21-3250 and DC-21-3350NOx as NO231.52 tpyannualcombinedp. 13

DOCUMENT HISTORY

What this document says it changes

permit amendment

Explicitly supersedes the document dated 2024-12-18.

p. 3, p. 4

QA NOTES

Ambiguity stays visible

  • Official PDF cover/permit heading checked in the manual second pass.
  • Capacity described as de-rated in permit. — Value transcribed from official permit equipment/condition table; no totals calculated.
  • Value transcribed from official permit equipment/condition table; no totals calculated.
  • Directly stated permitted limit; not an actual emissions value.
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