Richardson Flat Tailings
Proposed NPL SiteSummit County, UT
According to the EPA Superfund Enterprise Management System, Richardson Flat Tailings in Summit County, UT is listed with NPL status Proposed NPL Site. Its Hazard Ranking System (HRS) score is 50.23. The public extract catalogs 16 contaminant records for this site. NPL listing is a cleanup-authority designation, not a measured health-risk score.
Superfund National Priorities List inclusion (status and HRS score shown above) is the EPA's formal designation that a contaminated site qualifies for long-term federal cleanup authority under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA). A federal-facility classification means the site is owned or operated by a federal agency, which routes cleanup responsibility differently than a privately owned site.
"Construction Complete" (status shown above) is an EPA milestone marking that the physical remedy work is finished, not that the site has exited EPA oversight; long-term monitoring can continue afterward. Deletion from the NPL is a separate, later step the EPA takes only once it determines every planned response action is finished.
NPL listing is a cleanup-authority designation in the EPA record, not a quantitative health-risk score. HRS scores of 28.50 or above qualify a site for the NPL under the EPA screening model (toxicity, pathways, waste quantity, and affected population factors). For current site conditions and official community notices, see the EPA Regional Superfund profile and the Utah environmental agency.
What is the cleanup status of this Superfund site?
Contaminants
| Contaminant | Media |
|---|---|
| ALUMINUM | Solid Waste |
| ARSENIC | Sediment |
| ARSENIC | Solid Waste |
| ARSENIC | Surface Water |
| CADMIUM | Sediment |
| CADMIUM | Surface Water |
| COPPER | Sediment |
| LEAD | Sediment |
| LEAD | Solid Waste |
| LEAD | Surface Water |
| MERCURY | Sediment |
| MERCURY | Solid Waste |
| NICKEL | Sediment |
| ZINC | Sediment |
| ZINC | Solid Waste |
| ZINC | Surface Water |
Location
Other Superfund Sites in Utah
| Site Name | Status | HRS Score |
|---|---|---|
| 700 South 1600 East PCE Plume | NPL Site | 50.00 |
| Bountiful/Woods Cross 5th South PCE Plume | NPL Site | 50.00 |
| Davenport and Flagstaff Smelters | Deleted NPL Site | 32.50 |
| Eureka Mills | Deleted NPL Site | 50.00 |
| Five Points PCE Plume | NPL Site | 50.00 |
| Hill Air Force Base | NPL Site | 49.94 |
| Intermountain Waste Oil Refinery | Deleted NPL Site | 50.00 |
| International Smelting and Refining | Deleted NPL Site | 58.31 |
| Jacobs Smelter | NPL Site | 50.00 |
| Kennecott (North Zone) | Proposed NPL Site | 59.18 |
How does this site's HRS score compare in Utah?
Of the 24 Utah Superfund sites with a scored Hazard Ranking System (HRS) evaluation, Richardson Flat Tailings ranks #8 by score (50.23).
Either side of it: Portland Cement (Kiln Dust 2 & 3) (54.40), Tooele Army Depot (North Area) (53.95), 700 South 1600 East PCE Plume (50.00), Bountiful/Woods Cross 5th South PCE Plume (50.00)
Frequently Asked Questions
What is the Richardson Flat Tailings Superfund site? ▼
What does NPL listing mean for Richardson Flat Tailings? ▼
What is the HRS score for Richardson Flat Tailings? ▼
What contaminants are at the Richardson Flat Tailings site? ▼
What is the cleanup status of Richardson Flat Tailings? ▼
NPL listing is a cleanup-authority designation in the EPA record, not a quantitative health-risk score. See Superfund Sites Explained for how the National Priorities List, Hazard Ranking System, and cleanup phases work.
Read our methodology - how this data is sourced, computed, and verified.