Page-cited permit extraction

Hayden Technologies, LLC

Loudoun Co., Virginia

QA status Machine-extractedRelease dated July 29, 2026

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EVIDENCE NOTE

What the public record says

A machine-extracted candidate of equipment groups and permit limits stated in Virginia DEQ permit 74163-9, 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

8 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
`FWP2`	fire-pump engine—	1 units131 kW each	diesel fuel oil—	See operating-scope table—	p. 6 ↗Machine-extracted from an official document equipment table; column grouping requires second review.
`FWP1`	fire-pump engineJohn Deere · Diesel	1 units55 kW each	diesel fuel oil—	See operating-scope table—	p. 6 ↗Machine-extracted from an official document equipment table; column grouping requires second review.
`Group 1 EG1 through EG26 and EG193 through EG260`	emergency engine generator setCaterpillar · 3516E	94 units2750 kW each	diesel fuel oil—	See operating-scope table—	p. 6 ↗Machine-extracted from an official document equipment table; column grouping requires second review.
`Group 2 EG53 through EG62 and EG261 through EG279`	emergency engine generator setCaterpillar · 3512C	29 units1750 kW each	diesel fuel oil—	See operating-scope table—	p. 7 ↗Machine-extracted from an official document equipment table; column grouping requires second review.
Group 3 Power Blocks A through Z (EG63 through EG192) A: EG63 through EG67 B: EG68 through EG72 C: EG73 through EG77 D: EG78 through EG82 E: EG83 through EG87 F: EG88 through EG92 G: EG93 through EG97 H: EG98 through EG102 I: EG103 through EG107 J: EG108 through EG112 K: EG113 through EG117 L: EG118 through EG122 M: EG123 through EG127 N: EG128 through EG132 O: EG133 through EG137 P: EG138 through EG142 Q: EG143 through EG147 R: EG148 through EG152 S: EG153 through EG157 T: EG158 through EG162 U: EG163 through EG167 V: EG168 through EG172 W: EG173 through EG177 X: EG178 through EG182 Y: EG183 through EG187 Z: EG188 through EG192	emergency engine generator setVolvo · Penta TWD1673GE Non-	130 units625 kW each	diesel fuel oilselective catalytic reduction (SCR)	See operating-scope table—	p. 7 ↗Machine-extracted from an official document equipment table; column grouping requires second review.
`CT1 through CT20`	cooling tower—	20 unitsNo reliable per-unit rating transcribed	——	See operating-scope table—	p. 7 ↗Machine-extracted from an official document equipment table; column grouping requires second review.
`CT21 and CT22`	cooling tower—	2 unitsNo reliable per-unit rating transcribed	——	See operating-scope table—	p. 8 ↗Machine-extracted from an official document equipment table; column grouping requires second review.
	engine generator set—	— unitsNo reliable per-unit rating transcribed	——	See operating-scope table—	p. 14 ↗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
`EG1 through EG26, EG53 through EG62, and EG193 through EG279`	20 hours/year	eriodic maintenance, testing, and operational training. (9 VAC 5-80-1180) [4/30/2025] 14. Operating Hours – a. Each individual emergency diesel engine gen-set (Ref. Nos. EG1 through EG26, EG53 through EG62, and EG193 through EG279) shall not operate more than 20 hours per year for scheduled maintenance checks and readiness testing (Scheduled MCRT) (as provided in Condition 12.c.). b. Each individual emergency diesel engine gen-sets (Ref. Nos. EG1 through EG26, EG53 through EG62, and EG193 thrMachine-extracted normative operating-hours statement; second review pending.	p. 13 ↗
`EG1 through EG26, EG53 through EG62, and EG193 through EG279`	500 hours/year	for scheduled maintenance checks and readiness testing (Scheduled MCRT) (as provided in Condition 12.c.). b. Each individual emergency diesel engine gen-sets (Ref. Nos. EG1 through EG26, EG53 through EG62, and EG193 through EG279) shall not operate more than 500 hours per year for all purposes (as provided in Condition 12) combined. c. Each fire pump diesel engine (Ref. Nos. FWP1 and FWP2) shall not operate more than 100 hours per year for all purposes (as provided in Condition 13) combined.Machine-extracted normative operating-hours statement; second review pending.	p. 13 ↗
`FWP1 and FWP2`	100 hours/year	f. Nos. EG1 through EG26, EG53 through EG62, and EG193 through EG279) shall not operate more than 500 hours per year for all purposes (as provided in Condition 12) combined. c. Each fire pump diesel engine (Ref. Nos. FWP1 and FWP2) shall not operate more than 100 hours per year for all purposes (as provided in Condition 13) 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 perioMachine-extracted normative operating-hours statement; second review pending.	p. 13 ↗

Permitted emission limits

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

Inspect 33 transcribed limit rows

Reference	Pollutant	Limit	Basis / scope	Source
`Group 1 (Ref. Nos. EG1 through EG26 and EG193 through EG260)`	NOx as NO2—	53.48 lb/hrhourly	——	p. 16 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Group 1 (Ref. Nos. EG1 through EG26 and EG193 through EG260)`	NOx as NO2—	10.34 lb/hrhourly	——	p. 16 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Group 1 (Ref. Nos. EG1 through EG26 and EG193 through EG260)`	VOC—	1.25 lb/hrhourly	——	p. 16 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Group 1 (Ref. Nos. EG1 through EG26 and EG193 through EG260)`	PM10—	1.01 lb/hrhourly	——	p. 16 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Group 1 (Ref. Nos. EG1 through EG26 and EG193 through EG260)`	PM2.5—	1.01 lb/hrhourly	——	p. 16 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Group 2 (Ref. Nos. EG53 through EG62 and EG261 through EG279)`	NOx as NO2—	34.18 lb/hrhourly	——	p. 17 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Group 2 (Ref. Nos. EG53 through EG62 and EG261 through EG279)`	NOx as NO2—	5.90 lb/hrhourly	——	p. 17 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Group 2 (Ref. Nos. EG53 through EG62 and EG261 through EG279)`	VOC—	0.91 lb/hrhourly	——	p. 17 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Group 2 (Ref. Nos. EG53 through EG62 and EG261 through EG279)`	PM10—	0.55 lb/hrhourly	——	p. 17 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Group 2 (Ref. Nos. EG53 through EG62 and EG261 through EG279)`	PM2.5—	0.55 lb/hrhourly	——	p. 17 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Group 3 (Ref. Nos. EG63 through EG192)`	NOx as NO2—	7.24 lb/hrhourly	——	p. 17 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Group 3 (Ref. Nos. EG63 through EG192)`	VOC—	0.40 lb/hrhourly	——	p. 17 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Group 3 (Ref. Nos. EG63 through EG192)`	PM10—	0.13 lb/hrhourly	——	p. 17 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Group 3 (Ref. Nos. EG63 through EG192)`	PM2.5—	0.13 lb/hrhourly	——	p. 17 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. No. FWP1`	NOx as NO2—	0.47 lb/hrhourly	——	p. 18 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. No. FWP2`	NOx as NO2—	1.08 lb/hrhourly	——	p. 18 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. No. FWP1`	NOx as NO2—	0.11 lb/hrhourly	——	p. 18 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. No. FWP2`	NOx as NO2—	0.43 lb/hrhourly	——	p. 18 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. No. FWP1`	VOC—	0.03 lb/hrhourly	——	p. 18 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. No. FWP2`	VOC—	0.09 lb/hrhourly	——	p. 18 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. No. FWP1`	PM10—	0.02 lb/hrhourly	——	p. 18 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. No. FWP2`	PM10—	0.04 lb/hrhourly	——	p. 18 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. No. FWP1`	PM2.5—	0.02 lb/hrhourly	——	p. 18 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. No. FWP2`	PM2.5—	0.04 lb/hrhourly	——	p. 18 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. Nos. CT1 through CT22 (all units combined)`	PM10—	3.11 tpyannual	combined—	p. 18 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Ref. Nos. CT1 through CT22 (all units combined)`	PM2.5—	1.87 tpyannual	combined—	p. 18 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Group 1 through Group 3 (Ref. Nos. EG1 through EG26 and EG53 through EG279 (all units combined)`	NOx as NO2—	95.00 tpyannual	combined—	p. 18 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Group 1 through Group 3 (Ref. Nos. EG1 through EG26 and EG53 through EG279 (all units combined)`	VOC—	5.73 tpyannual	combined—	p. 18 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Group 1 through Group 3 (Ref. Nos. EG1 through EG26 and EG53 through EG279 (all units combined)`	PM10—	3.80 tpyannual	combined—	p. 18 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
`Group 1 through Group 3 (Ref. Nos. EG1 through EG26 and EG53 through EG279 (all units combined)`	PM2.5—	3.80 tpyannual	combined—	p. 18 ↗Machine-extracted from an official permit limit table; header grouping requires second review.
	visible emissions—	5 percent opacityvisible	——	p. 19 ↗Machine-extracted from a page line in an older official PDF; literal context: (Ref. Nos. EG1 through EG26, EG53 through EG62, and EG193 through EG279), non- emergency diesel engine gen-set (Ref. Nos. EG63 through EG192) and fire pump diesel engine (Ref. Nos. FWP1 and FWP2) shall not exceed 5% opacity except during one 6- minute period in any one hour in which visible emissions shall not exceed 10% opacity as
	visible emissions—	10 percent opacityvisible	——	p. 19 ↗Machine-extracted from a page line in an older official PDF; literal context: emergency diesel engine gen-set (Ref. Nos. EG63 through EG192) and fire pump diesel engine (Ref. Nos. FWP1 and FWP2) shall not exceed 5% opacity except during one 6- minute period in any one hour in which visible emissions shall not exceed 10% opacity as determined by EPA Method 9 (reference 40 CFR 60, Appendix A). This condition applies
	visible emissions—	20 percent opacityvisible	——	p. 19 ↗Machine-extracted from a page line in an older official PDF; literal context: emergency diesel engine gen-set (Ref. Nos. EG63 through EG192) and fire pump diesel engine (Ref. Nos. FWP1 and FWP2) shall not exceed 10% opacity except during one 6- minute period in any one hour in which visible emissions shall not exceed 20% opacity as determined by EPA Method 9 (reference 40 CFR 50, Appendix A).

DOCUMENT HISTORY

What this document says it changes

amended or superseding permit document

Explicitly supersedes the document dated 2024-01-03.

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.
Older-PDF text fallback; verify row and unit alignment.

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