CHARLESTON, W.Va. (AP) -- The 44-acre site was known as Elk Refining Co. from 1913 until its closure in 1982.
Hannah Lumber Co. began leasing a portion of the property in 1983 and operated a wood chipping facility.
The DEP says Pennzoil-Quaker State will work with the Office of Environmental Remediation to address environmental conditions at the site. The agreement requires it to identify any human health and ecological risks, then propose suitable cleanup standards.
Pennzoil-Quaker State will submit a final report to the environmental remediation staff before proceeding.
West Virginia's Voluntary Remediation and Redevelopment Act encourages voluntary cleanups of contaminated, abandoned and under-used sites, as well as their redevelopment.