WAVERLY, Ohio — State environmental regulators are seeking public comment on a request to modify long-term monitoring and financial assurance requirements at the former Parker Hannifin manufacturing site in Pike County.
The Ohio Environmental Protection Agency said it received a Resource Conservation and Recovery Act post-closure plan modification request on Feb. 4 for the former Parker Hannifin Corporation facility located at 11197 U.S. Route 23 in Waverly.
The request seeks to update financial assurance documentation as part of a separate proposal to extend the site’s post-closure care period by 10 years, through June 30, 2035. The original 30-year post-closure period began around June 1995 and concluded in June 2025, according to documents submitted to the agency.
Under U.S. Environmental Protection Agency rules, post-closure care refers to the period after a hazardous waste facility has shut down and been closed, during which the owner or operator must continue monitoring and maintaining the site to prevent contamination and protect public health and the environment. This typically includes groundwater monitoring, maintenance of caps or containment systems, operation of remediation controls, regular reporting to regulators, and maintaining financial assurance to ensure the work can continue. Federal regulations generally require a minimum 30-year post-closure care period, with extensions possible if contamination remains or ongoing oversight is needed.
The Parker Hannifin site is composed of three separate properties — northern, central, and southern — with differing land uses. The northern property is the site of the new Waverly Aldi store, which formerly housed a manufacturing facility operated by Parker Hannifin’s Hydraulic Valve Division.
The central and southern properties were historically used as farmland. The central property is currently owned and operated by Walmart, while the southern property remains farmland.
The former Parker Hannifin facility was constructed in 1969 and operated until 1988, when the plant closed. The facility building was demolished in 2017.
Environmental investigations conducted after the plant’s closure identified a plume of volatile organic compounds in groundwater extending south from the former dry well system toward Pee Pee Creek. Site investigations determined that trichloroethene (TCE) accounted for the majority of dissolved contamination detected in groundwater. Other chlorinated volatile organic compounds identified above groundwater protection standards include tetrachloroethene, 1,1-dichloroethene, cis-1,2-dichloroethene, methylene chloride, and vinyl chloride.
The Ohio EPA approved the site’s original post-closure plan in October 2001. Several amendments and revisions followed during source area and plume management remedy construction and activation, culminating in a revised post-closure and corrective action monitoring plan approved by the agency in October 2006.
Between 2006 and 2023, remediation system operations, groundwater monitoring, and reporting were conducted under Ohio EPA oversight. In September 2023, AECOM, on behalf of Parker Hannifin, submitted a temporary post-closure plan addendum, which Ohio EPA approved in December 2023. The remediation system was temporarily shut down in January 2024, though groundwater monitoring and reporting have continued under the approved plans.
Ohio EPA has opened a public comment period on the proposed post-closure plan modification and extension request. Written comments must be submitted by March 27, 2026, and should reference the Parker Hannifin post-closure plan modification request. Comments may be emailed to [email protected].