Page-cited permit extraction

QTS Investment Properties Ashburn LLC

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 74141-3, 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. 1 ↗, 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

2 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
`Gen21 through Gen37`	emergency engine generator setCaterpillar · 3516C	17 units2500 kW each	diesel fuel oil—	See operating-scope table—	p. 5 ↗Machine-extracted from an official document equipment table; column grouping requires second review.
`CT01 through CT11`	cooling tower—	11 unitsNo reliable per-unit rating transcribed	——	See operating-scope table—	p. 5 ↗Machine-extracted from an official document equipment table; column grouping requires second review.

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
`Gen01 through Gen38`	30 hours/year	n of each unit (which involves fuel combustion) shall be minimized to the maximum extent practical. (9VAC5-80-1180) [6/10/2025] 8. Operating Hours – a. Each individual emergency diesel engine gen-set (Ref. Nos. Gen01 through Gen38) shall not operate more than 30 hours per year for scheduled maintenance checks and readiness testing (Scheduled MCRT) (as provided in Condition 4.c). b. Each individual emergency diesel engine gen-set (Ref. Nos. Gen01 through Gen20) shall not operate more than 102Machine-extracted normative operating-hours statement; second review pending.	p. 8 ↗
`Gen01 through Gen20`	102 hours/year	hall not operate more than 30 hours per year for scheduled maintenance checks and readiness testing (Scheduled MCRT) (as provided in Condition 4.c). b. Each individual emergency diesel engine gen-set (Ref. Nos. Gen01 through Gen20) shall not operate more than 102 hours per year for all purposes (as provided in Condition 4) combined.Machine-extracted normative operating-hours statement; second review pending.	p. 8 ↗
`Gen21 through Gen38`	500 hours/year	QTS Investment Properties Ashburn, LLC Registration Number: 74141 June 10, 2025 Page 7 c. Each individual emergency diesel engine gen-set (Ref. Nos. Gen21 through Gen38) shall not operate more than 500 hours per year for all purposes (as provided in Condition 4) combined. The annual limits for hours of operation shall be calculated monthly as the sum of each consecutive 12-month period. Compliance for the consecutive 12-month periodMachine-extracted normative operating-hours statement; second review pending.	p. 9 ↗

Permitted emission limits

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

Inspect 39 transcribed limit rows

Reference	Pollutant	Limit	Basis / scope	Source
`Ref. No. Gen01`	NOx as NO2—	10.86 lb/hrhourly	——	p. 10 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. No. Gen01`	NOx as NO2—	56.34 lb/hrhourly	——	p. 10 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. Nos. Gen21 through Gen37`	NOx as NO2—	48.06 lb/hrhourly	per unit—	p. 10 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. No. Gen 38`	NOx as NO2—	24.09 lb/hrhourly	——	p. 10 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. No. Gen01`	NOx as NO2—	1.14 lb/hrhourly	——	p. 10 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. No. Gen01`	NOx as NO2—	8.45 lb/hrhourly	——	p. 10 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. Nos. Gen21 through Gen37`	NOx as NO2—	6.09 lb/hrhourly	per unit—	p. 10 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. No. Gen 38`	NOx as NO2—	2.10 lb/hrhourly	——	p. 10 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. No. Gen01`	PM10—	0.19 lb/hrhourly	——	p. 10 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. No. Gen01`	PM10—	0.94 lb/hrhourly	——	p. 10 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. Nos. Gen21 through Gen37`	PM10—	0.58 lb/hrhourly	per unit—	p. 10 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. No. Gen 38`	PM10—	0.27 lb/hrhourly	——	p. 10 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. No. Gen01`	PM2.5—	0.19 lb/hrhourly	——	p. 10 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. No. Gen01`	PM2.5—	0.94 lb/hrhourly	——	p. 10 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. Nos. Gen21 through Gen37`	PM2.5—	0.58 lb/hrhourly	per unit—	p. 10 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. No. Gen 38`	PM2.5—	0.27 lb/hrhourly	——	p. 10 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. No. Gen01`	VOC—	0.38 lb/hrhourly	——	p. 10 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. No. Gen01`	VOC—	2.12 lb/hrhourly	——	p. 10 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. Nos. Gen21 through Gen37`	VOC—	1.21 lb/hrhourly	per unit—	p. 10 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. No. Gen 38`	VOC—	0.40 lb/hrhourly	——	p. 10 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. No. Gen01`	NOx as NO2—	0.55 tpyannual	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. Nos. Gen02 through Gen20`	NOx as NO2—	2.87 tpyannual	per unit—	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. Nos. Gen01 through Gen20 (all units combined)`	NOx as NO2—	55.15 tpyannual	combined—	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. Nos. Gen01 through Gen20 (all units combined)`	NOx as NO2—	42.90 tpyannual	combined—	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. No. Gen01`	NOx as NO2—	0.06 tpyannual	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. Nos. Gen02 through Gen20`	NOx as NO2—	0.43 tpyannual	per unit—	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. Nos. Gen01 through Gen20 (all units combined)`	NOx as NO2—	23.10 tpyannual	combined—	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. No. Gen01`	PM10—	0.01 tpyannual	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. Nos. Gen02 through Gen20`	PM10—	0.05 tpyannual	per unit—	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. Nos. Gen01 through Gen20 (all units combined)`	PM10—	1.74 tpyannual	combined—	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. No. Gen01`	PM2.5—	0.01 tpyannual	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. Nos. Gen02 through Gen20`	PM2.5—	0.05 tpyannual	per unit—	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. Nos. Gen01 through Gen20 (all units combined)`	PM2.5—	1.74 tpyannual	combined—	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. No. Gen01`	VOC—	0.02 tpyannual	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. Nos. Gen02 through Gen20`	VOC—	0.11 tpyannual	per unit—	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. Nos. Gen01 through Gen20 (all units combined)`	VOC—	2.11 tpyannual	combined—	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. Nos. Gen01 through Gen20 (all units combined)`	VOC—	4.83 tpyannual	combined—	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. Nos. CT01 through CT11 (all units combined)`	PM—	5.83 tpyannual	combined—	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. Nos. CT01 through CT11 (all units combined)`	PM10—	3.73 tpyannual	combined—	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.

DOCUMENT HISTORY

What this document says it changes

amended or superseding permit document

Explicitly supersedes the document dated 2022-08-25.

p. 1 ↗, p. 3 ↗

QA NOTES

Ambiguity stays visible

Machine-extracted candidate. Verify every reused value against the cited official PDF page.
Verify table column grouping and any alternative models.
Confirm whether the limit is per unit, combined, or limited to testing/maintenance.
Confirm multi-row and merged-column header association.

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