Superfund Record of Decision (EPA Region 8): Monticello Mill Tailings site, San Juan County, UT. (First remedial action), August 1990
The 300-acre Monticello Mill Tailings site is comprised of a 78-acre inactive uranium and vanadium milling operation and affected peripheral properties in Monticello, San Juan County, Utah. Surrounding land use is rural residential and agricultural. Milling of ore began in 1942, and a vanadium/uranium sludge product was produced onsite from 1943 to 1944. The mill was permanently closed in 1960, and the tailings piles were covered and vegetated. In 1972, 15,000 cubic yards of contaminated soil were excavated and disposed of on the onsite tailings piles. Site investigations from 1989 to 1990 identified the presence of onsite and offsite radioactively-contaminated soil and ground water, and elevated concentrations of metals within the tailings piles. The Record of Decision (ROD)addresses remediation of two Operable Units (OUs): the 78-acre Millsite area (OU1), and the 240-acres of peripheral properties (OU2). The primary contaminants of concern affecting the soil and debris are metals including arsenic, chromium, and lead; and radioactive materials including radium-226 and radon.
- Research Organization:
- Environmental Protection Agency, Washington, DC (United States). Office of Emergency and Remedial Response
- OSTI ID:
- 5268599
- Report Number(s):
- PB-91-921482/XAB; EPA/ROD/R--08-90/034
- Country of Publication:
- United States
- Language:
- English
Similar Records
Superfund Record of Decision (EPA Region 8): Monticello Vicinity Properties, UT. (First remedial action), September 1989. Final report
Monticello Mill Tailings Site, Operable Unit lll, Annual Groundwater Report, May 2015 Through April 2016
Related Subjects
540220* -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (1990-)
540230 -- Environment
Terrestrial-- Radioactive Materials Monitoring & Transport-- (1990-)
540320 -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (1990-)
540330 -- Environment
Aquatic-- Radioactive Materials Monitoring & Transport-- (1990-)
ALKALINE EARTH ISOTOPES
ALPHA DECAY RADIOISOTOPES
AQUIFERS
ARSENIC
CARBON 14 DECAY RADIOISOTOPES
CHROMIUM
CONTAMINATION
DEVELOPED COUNTRIES
ECOLOGICAL CONCENTRATION
ELEMENTS
EVEN-EVEN NUCLEI
FEDERAL REGION VIII
FLUIDS
GASES
GROUND WATER
HAZARDOUS MATERIALS
HEAVY ION DECAY RADIOISOTOPES
HEAVY NUCLEI
HYDROGEN COMPOUNDS
INDUSTRIAL WASTES
ISOTOPES
MANAGEMENT
MATERIALS
METALS
MILL TAILINGS
NATIONAL GOVERNMENT
NONMETALS
NORTH AMERICA
NUCLEI
OXYGEN COMPOUNDS
POLLUTION
RADIOISOTOPES
RADIUM 226
RADIUM ISOTOPES
RADON
RARE GASES
SEMIMETALS
SITE SURVEYS
SOILS
SOLID WASTES
STATE GOVERNMENT
SUPERFUND
SURFACE WATERS
TAILINGS
TRANSITION ELEMENTS
USA
UTAH
VANADIUM
WASTE DISPOSAL
WASTE MANAGEMENT
WASTES
WATER
YEARS LIVING RADIOISOTOPES