Page-cited permit extraction

Zayo Group, 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 73743-7, 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

7 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
`EG4-1 through EG4-12`	emergency engine generator setCummins · emergency gen sets with QSK78-G36	12 units3000 kW each	diesel fuel oil—	See operating-scope table—	p. 5 ↗Machine-extracted from an official document equipment table; column grouping requires second review.
`EG4BB1 and EG4BB2`	emergency engine generator setCummins · emergency gen sets with QST30-G5	2 units1000 kW each	diesel fuel oil—	See operating-scope table—	p. 5 ↗Machine-extracted from an official document equipment table; column grouping requires second review.
`EG2-1 through EG2-26`	emergency engine generator setCaterpillar · 3516E	26 units3000 kW each	diesel fuel oil—	See operating-scope table—	p. 5 ↗Machine-extracted from an official document equipment table; column grouping requires second review.
`EG2BB`	emergency engine generator setCaterpillar · C18	1 units750 kW each	diesel fuel oil—	See operating-scope table—	p. 5 ↗Machine-extracted from an official document equipment table; column grouping requires second review.
`2C, 3A, 3B, 3C, 3D, and 3S`	emergency engine generator setCaterpillar · 3516C	6 units2000 kW each	diesel fuel oil—	See operating-scope table—	p. 5 ↗Machine-extracted from an official document equipment table; column grouping requires second review.
`2A, 2B, and 2S`	emergency engine generator setCaterpillar · 3516C	3 units2000 kW each	diesel fuel oil—	See operating-scope table—	p. 5 ↗Machine-extracted from an official document equipment table; column grouping requires second review.
`1A, 1C, 1D, 1E, and 1S`	emergency engine generator setCaterpillar · 3516C	5 units2000 kW each	diesel fuel oil—	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
`1A, 1C, 1D, 1E, 1S, 2A, 2B, 2C, 2S, 3A, 3B, 3C, 3D, 3S, EG2-1 through EG2-26, EG2BB, EG4-1 through EG`	500 hours/year	August 4, 2025 Page 7 8. Operating Hours– a. Each individual emergency diesel engine gen-set (Ref. Nos. 1A, 1C, 1D, 1E, 1S, 2A, 2B, 2C, 2S, 3A, 3B, 3C, 3D, 3S, EG2-1 through EG2-26, EG2BB, EG4-1 through EG4-12, EG4BB1, and EG4BB2) shall not operate more than 500 hours per year for all purposes (as provided in Condition 4), calculated monthly as the sum of each consecutive 12 month period. b. Each individual emergency diesel engine gen-set (Ref. Nos. 2C, 3A, 3B, 3C, 3D, 3S) shall not operate mMachine-extracted normative operating-hours statement; second review pending.	p. 9 ↗
`2C, 3A, 3B, 3C, 3D, 3S`	100 hours/year	te more than 500 hours per year for all purposes (as provided in Condition 4), calculated monthly as the sum of each consecutive 12 month period. b. Each individual emergency diesel engine gen-set (Ref. Nos. 2C, 3A, 3B, 3C, 3D, 3S) shall not operate more than 100 hour per year for scheduled maintenance checks and readiness testing, unscheduled maintenance, testing, and operational training (as provided in Conditions 4.c and 4.d), calculated monthly as the sum of each consecutive 12 month periMachine-extracted normative operating-hours statement; second review pending.	p. 9 ↗
`EG2-1 through EG2-26, EG2BB, EG4-1 through EG4-12, EG4BB1, and EG4BB2`	25 hours/year	ded in Conditions 4.c and 4.d), calculated monthly as the sum of each consecutive 12 month period. c. Each individual emergency diesel engine gen-set (Ref. Nos. EG2-1 through EG2-26, EG2BB, EG4-1 through EG4-12, EG4BB1, and EG4BB2) shall not operate more than 25 hours per year for scheduled maintenance checks and readiness testing (Scheduled MCRT, as provided in Condition 4.c), calculated monthly as the sum of each consecutive 12 month period. Compliance for the consecutive 12-month period shMachine-extracted normative operating-hours statement; second review pending.	p. 9 ↗

Permitted emission limits

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

Inspect 35 transcribed limit rows

Reference	Pollutant	Limit	Basis / scope	Source
`Caterpillar 3516C (Ref. Nos. 1A, 1C, 1D, 1E, 1S, 2A, 2B, 2C, 2S, 3A, 3B, 3C, 3D, and 3S)`	NOx as NO2—	38.85 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3516E (Ref. Nos. EG2-1 through EG2-26)`	NOx as NO2—	54.53 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar C18 (Ref. No. EG2BB)`	NOx as NO2—	14.35 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3516C (Ref. Nos. 1A, 1C, 1D, 1E, 1S, 2A, 2B, 2C, 2S, 3A, 3B, 3C, 3D, and 3S)`	NOx as NO2—	2.19 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3516E (Ref. Nos. EG2-1 through EG2-26)`	NOx as NO2—	11.62 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar C18 (Ref. No. EG2BB)`	NOx as NO2—	4.74 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3516C (Ref. Nos. 1A, 1C, 1D, 1E, 1S, 2A, 2B, 2C, 2S, 3A, 3B, 3C, 3D, and 3S)`	VOC—	1.14 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3516E (Ref. Nos. EG2-1 through EG2-26)`	VOC—	0.58 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar C18 (Ref. No. EG2BB)`	VOC—	1.92 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3516C (Ref. Nos. 1A, 1C, 1D, 1E, 1S, 2A, 2B, 2C, 2S, 3A, 3B, 3C, 3D, and 3S)`	PM10—	0.62 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3516E (Ref. Nos. EG2-1 through EG2-26)`	PM10—	0.92 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar C18 (Ref. No. EG2BB)`	PM10—	0.33 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3516C (Ref. Nos. 1A, 1C, 1D, 1E, 1S, 2A, 2B, 2C, 2S, 3A, 3B, 3C, 3D, and 3S)`	PM2.5—	0.62 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3516E (Ref. Nos. EG2-1 through EG2-26)`	PM2.5—	0.92 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar C18 (Ref. No. EG2BB)`	PM2.5—	0.33 lb/hrhourly	——	p. 11 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Cummins C3000D6EB/ QSK78-G36 engine (Ref. Nos. EG4-1 through EG4-12)`	NOx as NO2—	55.76 lb/hrhourly	——	p. 12 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Cummins QST30-G5 (Ref. Nos. EG4BB1 and EG4BB2)`	NOx as NO2—	16.13 lb/hrhourly	——	p. 12 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Cummins C3000D6EB/ QSK78-G36 engine (Ref. Nos. EG4-1 through EG4-12)`	NOx as NO2—	3.93 lb/hrhourly	——	p. 12 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Cummins QST30-G5 (Ref. Nos. EG4BB1 and EG4BB2)`	NOx as NO2—	2.70 lb/hrhourly	——	p. 12 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Cummins C3000D6EB/ QSK78-G36 engine (Ref. Nos. EG4-1 through EG4-12)`	VOC—	1.18 lb/hrhourly	——	p. 12 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Cummins QST30-G5 (Ref. Nos. EG4BB1 and EG4BB2)`	VOC—	0.29 lb/hrhourly	——	p. 12 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Cummins C3000D6EB/ QSK78-G36 engine (Ref. Nos. EG4-1 through EG4-12)`	PM10—	0.61 lb/hrhourly	——	p. 12 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Cummins QST30-G5 (Ref. Nos. EG4BB1 and EG4BB2)`	PM10—	0.53 lb/hrhourly	——	p. 12 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Cummins C3000D6EB/ QSK78-G36 engine (Ref. Nos. EG4-1 through EG4-12)`	PM2.5—	0.61 lb/hrhourly	——	p. 12 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Cummins QST30-G5 (Ref. Nos. EG4BB1 and EG4BB2)`	PM2.5—	0.53 lb/hrhourly	——	p. 12 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3516C, Caterpillar 3516E, and Cummins C3000D6EB/QSK78-G36 engine (Ref. Nos. 1A, 1C, 1D, 1E, 1S, 2A, 2B, 2C, 2S, 3A, 3B, 3C, 3D, 3S, EG2-1 through EG2-26, and EG4-1 through EG4-12)`	NOx as NO2—	95.87 tpyannual	——	p. 12 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3516C, Caterpillar 3516E, and Cummins C3000D6EB/QSK78-G36 engine (Ref. Nos. 1A, 1C, 1D, 1E, 1S, 2A, 2B, 2C, 2S, 3A, 3B, 3C, 3D, 3S, EG2-1 through EG2-26, and EG4-1 through EG4-12)`	NOx as NO2—	42.01 tpyannual	——	p. 12 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3516C, Caterpillar 3516E, and Cummins C3000D6EB/QSK78-G36 engine (Ref. Nos. 1A, 1C, 1D, 1E, 1S, 2A, 2B, 2C, 2S, 3A, 3B, 3C, 3D, 3S, EG2-1 through EG2-26, and EG4-1 through EG4-12)`	VOC—	12.62 tpyannual	——	p. 12 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3516C, Caterpillar 3516E, and Cummins C3000D6EB/QSK78-G36 engine (Ref. Nos. 1A, 1C, 1D, 1E, 1S, 2A, 2B, 2C, 2S, 3A, 3B, 3C, 3D, 3S, EG2-1 through EG2-26, and EG4-1 through EG4-12)`	PM10—	6.09 tpyannual	——	p. 12 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Caterpillar 3516C, Caterpillar 3516E, and Cummins C3000D6EB/QSK78-G36 engine (Ref. Nos. 1A, 1C, 1D, 1E, 1S, 2A, 2B, 2C, 2S, 3A, 3B, 3C, 3D, 3S, EG2-1 through EG2-26, and EG4-1 through EG4-12)`	PM2.5—	6.09 tpyannual	——	p. 12 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`All Units (Ref. Nos. 1A, 1C, 1D, 1E, 1S, 2A, 2B, 2C, 2S, 3A, 3B, 3C, 3D, 3S, EG2-1 through EG2-26, EG2BB, EG4-1 through EG4-12, EG4BB1, and EG4BB2)`	NOx as NO2—	96.50 tpyannual	combined—	p. 13 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`All Units (Ref. Nos. 1A, 1C, 1D, 1E, 1S, 2A, 2B, 2C, 2S, 3A, 3B, 3C, 3D, 3S, EG2-1 through EG2-26, EG2BB, EG4-1 through EG4-12, EG4BB1, and EG4BB2)`	NOx as NO2—	42.37 tpyannual	combined—	p. 13 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`All Units (Ref. Nos. 1A, 1C, 1D, 1E, 1S, 2A, 2B, 2C, 2S, 3A, 3B, 3C, 3D, 3S, EG2-1 through EG2-26, EG2BB, EG4-1 through EG4-12, EG4BB1, and EG4BB2)`	VOC—	12.75 tpyannual	combined—	p. 13 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`All Units (Ref. Nos. 1A, 1C, 1D, 1E, 1S, 2A, 2B, 2C, 2S, 3A, 3B, 3C, 3D, 3S, EG2-1 through EG2-26, EG2BB, EG4-1 through EG4-12, EG4BB1, and EG4BB2)`	PM10—	6.13 tpyannual	combined—	p. 13 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`All Units (Ref. Nos. 1A, 1C, 1D, 1E, 1S, 2A, 2B, 2C, 2S, 3A, 3B, 3C, 3D, 3S, EG2-1 through EG2-26, EG2BB, EG4-1 through EG4-12, EG4BB1, and EG4BB2)`	PM2.5—	6.13 tpyannual	combined—	p. 13 ↗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 2022-06-01.

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.

← Return to evidence index