# Regulations.gov document: USGS. 1987. United States Geological Survey. Groundwater geochemistry and radon-222 distribution in two sites on the Reading Prong, Eastern Pennsylvania. In Proceedings of Georad Conference April 21-22, 1987, St. Louis Mo. Special publication No. 4, 1988 [PHASE-III-RADS-III-B2E1-25] — retained record

> Retained regulations record from regulations-gov.

Canonical: https://highsignal.app/data/records/786c5f1f10842a17

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


source: [regulations](https://highsignal.app/data/regulations) (regulations-gov)  published 2026-08-17 04:00 ingested 2026-08-18 06:29

[original source ↗](https://www.regulations.gov/document/EPA-HQ-OW-1986-0161-0136)

## retained text



```
Query: data center
Agency: EPA
Type: Supporting & Related Material
Docket: EPA-HQ-OW-1986-0161
```



document fetched 2026-08-18 06:29 · canonical https://regulations.gov/document/EPA-HQ-OW-1986-0161-0136