# WASHINGTON NAVY YARD
> **Administrative - Formal** · FY1999 · — · —
## Case
- **Activity ID:** `18423`
- **Case Number:** 03-1999-0052
- **Type:** Administrative - Formal
- **Lead:** EPA
- **Outcome:** —
- **Penalty assessed:** —
- **Cost recovery:** —
- **Compliance action $:** —
- **Multimedia (multi-env):** N
## Defendants
- WASHINGTON NAVY YARD (complaint) (settlement)
## Summary

EPA R3 received an Explanation of Significant Difference (ESD) that reviewed the human health risk assessment based on updated toxicity values for polycyclic aromatic hydrocarbons (PAHs) for two OUs at the Washington Navy Yard. The updated values allowed for the previous  unacceptable risk  designation for PAH exposures at EA 19 and the Eastern Extension EA to be updated to  no unacceptable risk , allowing for the removal of LUCs at these OUs.

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*Source: [EPA ECHO](https://echo.epa.gov/) · AI Analytics · CC0 1.0*