Northwest 58th Street Landfill

• Site Profile
• Administrative Record Index (PDF): Deletion (4 pp., 222K)
• Reuse Fact Sheet (PDF, 1 pp., 169K)
• Additional Site Documents including Five Year Reviews, Records of Decisions (ROD) and Explanation of Significant Differences (ESD).
• For documents not available on the website, please contact the Region 4 Freedom of Information Office (http://www.epa.gov/region4/foiapgs/submit.htm).

Site Background:
The Northwest 58th Street Landfill is a 660 acre site located in Hialeah, Dade County, Florida. The landfill is located along the eastern edge of the Everglades wetlands.  From 1952 to 1982, the site operated as a municipal landfill, receiving approximately 60,000 tons of waste in 1952 and increasing annually over 30 years of operation to over 1,000,000 tons per year.  Small quantities of household hazardous materials, such as pesticides, paints, and solvents were considered to be municipal waste.

Threats and Contaminants

In the past, leachate from the landfill contaminated groundwater with heavy metals including arsenic and lead, as well as volatile organic compounds (VOCs) such as vinyl chloride. Potential risks to individuals may have occurred if they drank the contaminated groundwater. The County is treating groundwater extracted from nearby wellfields prior to distribution.

Cleanup Approach

The site has been addressed in a single phase.

Response Action Status

Entire Site: The cleanup plan, completed by Metro Dade County, the potentially responsible party, includes: controlling leachate generation by a combination of grading, drainage control, and capping; providing a public water supply to replace approximately 60 contaminated wells; and closing the landfill.  The County installed an alternate water supply in 1988 and a leachate interception system in 1989.  Additional cover has been applied to the landfill.  In early 1991, the contract for grading, capping the landfill with a synthetic membrane, and constructing a stormwater management system, roads, berms, swales, and retention areas was awarded.  The landfill was originally scheduled for closure in September 1992; however, during Hurricane Andrew, the landfill suffered damages which delayed the end of the landfill closure until January 1995.  Site closure was completed in mid-1995.

Cleanup Progress
All cleanup goals at the site have been met. The site was deleted from the NPL on October 11, 1996.  The provision of an alternate water supply and the installation of a leachate control system and additional cover at the Northwest 58th Street Landfill site reduced the potential for exposure to hazardous materials while site closure activities were being completed.

Three Five-Year Reviews of the remedy have been conducted.  In each review, the remedy was determined to be protective.  The next Five-Year Review will be conducted in 2010.