EnviroShield™
Manhole Cover for Benzene Mitigation
A mechanical seal for manhole and piping openings that stops fugitive benzene vapor emissions. Developed with RFS Compliance Solutions to help refineries and chemical plants meet BWON and NSPS QQQ no-detectable-emissions requirements, and custom-fit to your manhole. See the measurement guide ›
Availability & Quotes
Contact our sales partner, RFS Compliance Solutions, for availability and product information. Have your manhole measurements ready.
- Template type (Standard or Lobe)
- Measurements from the guide below
- Number of manholes
- Date needed
| Specification | Details |
|---|---|
| Purpose | Mechanical seal that reduces fugitive benzene emissions |
| Installs In | Manhole and piping openings (refineries, chemical plants, terminals, wastewater) |
| Compliance Support | BWON • NSPS QQQ (no detectable emissions) |
| Retention | Base locking mechanism |
| Sizes | Custom (every cover is made to your manhole measurements) |
| Template Types | Standard • Lobe |
| Technology | Certified Low Leak Technology by RFS |
| Availability | Purchase |
| Sales Partner | RFS Compliance Solutions (281) 786-3266 |
What Is the EnviroShield™ Manhole Cover?
Open manholes and piping access points are a common source of benzene vapor at refineries and chemical plants. The EnviroShield™ Manhole Cover seals that opening mechanically, and a base locking mechanism holds it in place.
It was developed by RFS Compliance Solutions, leaders in environmental compliance and certified low leak technology, together with USA Industries, leaders in engineered piping isolation and testing, as a BWON and NSPS QQQ no-detectable-emissions solution.
Why Benzene Mitigation Matters
The EPA strictly regulates toxic air emissions, including benzene, from petroleum refineries, chemical plants, terminals, storage facilities, and wastewater facilities.
Where Benzene Escapes
Ways to Reduce Emissions
- Install mechanical benzene mitigation, like the EnviroShield™, to seal off leaking openings
- Replace seals and gaskets on pumps, valves, and flanges
- Inspect and repair leaks on storage tanks and process equipment regularly
- Install vapor recovery systems for loading and unloading
- Modify processes to minimize benzene production
Field Installations
Which Template Do You Need?
Every EnviroShield™ is made to fit. Use the diagrams and measurement keys to identify your template and take the measurements we need.
Standard Template
Lobe Template
Built by Compliance and Engineering Leaders
RFS Compliance Solutions brings environmental compliance expertise and certified low leak technology. USA Industries brings engineered piping isolation and testing as an ISO 9001:2015 certified manufacturer. Together, we developed the EnviroShield™ as a BWON and NSPS QQQ no-detectable-emissions solution.
GripSafe® ST Isolation & Test Plugs
Engineered for safe, reliable isolation in high-pressure environments. The patented grip mechanism prevents plug ejection even before seal expansion begins on two of our three plug models.
EnviroShield™ FAQ
What does the EnviroShield Manhole Cover do?
It mechanically seals manhole and piping openings to prevent leaks and reduce fugitive benzene emissions, helping facilities meet BWON and NSPS QQQ requirements.
Which template do I need?
Use the Lobe Template when the manhole lid overhangs the base opening with a ledge (G) underneath. Otherwise, use the Standard Template. See the measurement guide, or call us and we'll help.
What measurements do you need?
Standard: top major diameter (A), top minor diameter (B), lid height (C), and inner pipe opening diameter (D). Lobe: the same A, B, and C, plus manhole opening diameter (D) and ledge height (G).
What sizes are available?
Every EnviroShield™ is custom-made to your manhole, so there is no standard size range. Send us the measurements from the guide and we'll build to fit.
Can I rent an EnviroShield?
No. EnviroShield™ Manhole Covers are available for purchase only.
How do I get a quote?
Contact our sales partner, RFS Compliance Solutions, at (281) 786-3266 or rfscompliancesolutions.com, or call USA Industries at (800) 456-8721.