# Regulations.gov document: Letter Dated April 15, 2025, from Jessica Shirley, Acting Secretary, Pennsylvania Department of Environmental Protection, to Catherine Libertz, Acting Regional Administrator EPA Region 3, Regarding PM2.5 Designations in Pennsylvania — retained record

> Retained regulations record from regulations-gov.

Canonical: https://highsignal.app/data/records/6e2b9d7869409a6a

[← sources](https://highsignal.app/data)


source: [regulations](https://highsignal.app/data/regulations) (regulations-gov)  published 2026-10-06 04:00 ingested 2026-10-07 02:44

[original source ↗](https://www.regulations.gov/document/EPA-HQ-OAR-2024-0078-0129)

## retained text



```
Query: data center
Agency: EPA
Type: Supporting & Related Material
Docket: EPA-HQ-OAR-2024-0078
```



document fetched 2026-10-08 02:43 · canonical https://regulations.gov/document/EPA-HQ-OAR-2024-0078-0129