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Fact Sheet

July 2013

Opportunity to Comment on Proposed Remedy, Former Safety-Kleen Corp. Service Center, Mason City, Cerro Gordo County, Iowa


The U.S. Environmental Protection Agency (EPA) Region 7 announces a public comment period for the proposed remedy at the former Safety-Kleen Corp. Service Center facility located at 16 11th Street SW, Mason City, Iowa. The remedy proposed for the site is “No Further Corrective Action (Cleanup)”.

The Administrative Record file can be found at the Mason City Public Library, 225 Second Street SE, in Mason City, Iowa. The public comment period will run from July 17 through August 15, 2013, to enable the public to participate in the remedy selection process.

A public hearing is not scheduled at this time. If a request is received for a public hearing, in writing, with a statement of issues to be raised at the hearing, EPA will evaluate any request and hold a formal hearing if it finds that a hearing will contribute to the decision-making process by clarifying significant issues affecting the proposed remedy.

Written comments can be submitted by mail or email, and must be received no later than close of business August 15, 2013. Comments should be sent to:

Patricia Murrow
U.S. EPA Region 7, AWMD/WRAP
11201 Renner Blvd.
Lenexa, Kansas 66219
Email: murrow.patricia@epa.gov

Comments received will be summarized in a Response to Comments, and responses will be provided to those individuals providing the comments. The Response to Comments will be drafted at the conclusion of the public comment period and incorporated into the Administrative Record. EPA may modify the proposed final remedy or select other alternatives based on new information and comments from the public.


The former Safety-Kleen Corp. Service Center is located at 16 11th Street SW in the southern part of Mason City, Iowa. Safety-Kleen operated from August 1977 to April 1990, as a service center for distribution of mineral spirits and storage of spent mineral spirits, other parts-cleaning solvents, and dry cleaning wastes. Safety-Kleen utilized both product storage and hazardous waste storage units at this facility.

In April 1990, Safety-Kleen stopped all operations at the facility and began closure of the hazardous waste management units. Closure was conducted in accordance with applicable Resource Conservation and Recovery Act interim status regulations and the EPA-approved Closure Plan, including clean closure objectives and subsequent modifications.

The hazardous waste container storage area was investigated and decontaminated in 1994. Closure certification of the container storage unit was acknowledged by EPA in correspondence dated April 12, 1996. In 1992, the underground storage tanks and solvent return/fill station were decontaminated and removed, and upon removal, contamination was identified in the soil and groundwater at the site. Contamination consisted primarily of low concentrations of volatile organic compounds and total extractable hydrocarbons.

In 1999, Safety-Kleen implemented additional remedial activities consisting of dewatering and over-excavation of impacted soils. Confirmation soil samples were collected from the excavation and the results were below the EPA-approved clean closure objectives. Long-term groundwater monitoring has been conducted at the site since 1992, and as of 2009, groundwater sampling results have been below EPA-approved clean closure objectives for groundwater.

Due to the proximity of the underground hazardous waste storage tanks to the underground product tank, closure of the product mineral spirits tank, under Iowa Department of Natural Resources’ authority, has been coordinated with the waste solvent tanks. In a letter dated June 3, 2013, Iowa Department of Natural Resources Underground Storage Tank (UST) Section made a “No Action Required Classification” determination for the site.


Because contaminant concentration levels detected in on-site soils do not exceed the EPA-approved clean closure objective, and the groundwater monitoring indicates that hazardous waste contaminant levels in groundwater are below levels set for health-based drinking water standards and EPA-approved clean closure objectives, EPA has determined that no further remedial work is necessary at the former Safety-Kleen Service Center facility, thus the proposed final remedy is “No Further Corrective Action.” In addition, the Iowa Department of Natural Resources made a determination of “No Action Required Classification” for the former Safety-Kleen site in June 2013.


Copies of the decision document and documents used to determine the proposed remedy are available to the public during normal business hours at the following locations:

Mason City Public Library
225 Second Street SE
Mason City, Iowa 50401
(641) 421-3668

EPA Region 7 Records Center
11201 Renner Blvd.
Lenexa, Kansas 66219
(913) 551-7166

The Administrative Record is also available on the EPA Region 7 website at www.epa.gov/region7/public_notices.

If you have questions, or want to join the mailing list, please contact:

Beckie Himes
Community Involvement Coordinator
U.S. EPA, Region 7
Office of Public Affairs
11201 Renner Blvd.
Lenexa, KS 66219
Phone: (913) 551-7253
Toll-free: (800) 223-0425
Email: himes.beckie@epa.gov

Joining the mailing list will allow individuals to receive any updated information related to this site.

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