# MARKWEST - GAS PLANTS (LEAD) (NC)
> **Judicial** · FY2017 · — · Final Order With Penalty
## Case
- **Activity ID:** `3600897057`
- **Case Number:** 05-2017-5009
- **Type:** Judicial
- **Lead:** EPA
- **Outcome:** Final Order With Penalty
- **Penalty assessed:** —
- **Cost recovery:** —
- **Compliance action $:** —
- **Multimedia (multi-env):** —
## Defendants
- MARKWEST - CADIZ PLANT (complaint) (settlement)
## Summary

MPLX has agreed to perform the following injunctive relief:  comply with NSPS Subpart OOOO at all plants; implement a 5-year LDAR Program at 12 of the 20 plants covered by the Consent Decree, and a limited version of the LDAR Program at the other 8 plants; improve or upgrade all pilot-operated pressure relief valves with emission bypass issues; comply with NSPS Subpart NNN; monitor fin fan plugs quarterly using optical gas imaging (OGI); improve efficiency on enclosed combustors to comply with NSPS Subpart OOOO; use alternative work practice (OGI plus Method 21 testing) for hose connections at railcars and truck loading operations; upgrade natural gasoline tanks to minimize releases from all deck fittings; require hot oil process heaters to comply with NSPS Subparts Db and Dc; and correct permits, as appropriate.  Defendants have calculated the cost of injunctive relief to be approximately $2.8 million.  

In addition, under the Decree, MPLX will spend $775,000 on mitigation projects, including $700,000 for the installation of control equipment to reduce fugitive VOC emissions from truck loading operations at compressor stations in Pennsylvania and Ohio.  

MPLX will pay a civil penalty of $925,000 as follows: (i) $693,751 to the United States; (ii) $77,083 to Oklahoma; (iii) $77,083 to Pennsylvania; and (iv) $77,083 to West Virginia.  In addition, MPLX will perform Supplemental Environmental Projects consisting of the following:  (i) installation and operation of VOC fen

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