The Hanlin-Allied-Olin Site is located approximately three miles south of Moundsville, West Virginia and is between the Ohio River, WV Route 2 and the Moundsville Golf Course. The site is in the mid-northern portion of Round Bottom, a sickle shaped bottom land alluvial deposit along the inside of a sharp meander in the Ohio River. Round Bottom encompasses an area approximately four miles in length and a width of one-half mile at its widest point. Allied Signal operated the site from 1953 until 1980. In 1980, the southern portion of the site, also known as the South Plant, was sold to LCP Chemicals-West Virginia. LCP Chemicals-West Virginia underwent a name change in 1990 to Hanlin Chemicals-West Virginia. In 1981, Allied Signal sold the northeast portion of its facility to Olin. Allied Signal kept the northwest potion of the site called Allied Park. Allied Signal, Inc. also underwent a name change and is now known as Honeywell International Inc. The Allied Park and Olin Areas, make up the North Plant Area. The property is divided into three areas described below: Hanlin Area (South Plant) -201 acres in the southern portion of the site; Olin Area (North Plant) - 137 acres in the northeastern portion of the site; and Allied Park Area (North Plant) -44 acres in the northwestern portion of the site. The North Plant and the South Plant had distinctly different chemical processes. At the North Plant, the primary activities were the production of aniline, nitrobenzene, methylene dianiline, dinitrotolune, toluenediamine, and toluene diisocyanate. The South Plant produced chloromethane compounds using the chlor-alkali (mercury cell) process; other products included chlorine and sodium hydroxide. Mercury and chloromethane have been identified in the groundwater in the area and threatens the Washington Public Lands Well which is down gradient of the site. The EPA has entered into several agreements with the Potentially Responsible Parties (PRPs): 1994 - EPA and Olin entered into an Administrative Order to investigate the contamination in the Olin Area. Based on the findings of the investigation, EPA recommended that contaminated soils be excavated and placed in the north cell of the landfill. 1995 - EPA and Honeywell (formerly Allied Signal) entered into an Administrative Order to evaluate the south plant and the Allied Park Area. Honeywell demolished the mercury cell building and removed tons of solid and hazardous waste material from the South plant. The investigation was completed in 2003. 1997 - EPA entered into and Administrative Order with Olin to conduct a removal action (based on the findings of the investigation). Approximately 100,000 cubic yards of contaminated soils were excavated and placed in the north cell of the new landfill during the winter and spring of 2008. 2001 - EPA entered into an Administrative Order with Honeywell and Olin to conduct a Remedial Investigation and Feasibility Study (RI/FS). This investigation addresses ground water and any soils that may not be examined under the other investigations. Ground water and soils data was compiled into a work plan. The RI/FS is in progress. 2003 - EPA entered into an Administrative Order with Honeywell to perform several tasks including: design and construct a hazardous waste landfill, consisting of a north and south cell, that complies with the hazardous waste regulations; excavate and consolidate waste material from several former land disposal units into the landfill; design and construct a soil vapor extraction (SVE) system to remediate contaminated subsurface soils in the former production area. Construction of the landfill was completed in August 2009. Operation of the SVE is ongoing.

Hazardous Ranking Score

54 / 100

A score of 28.5 or higher qualifies a site for the Superfund National Priority List.

Regional Contact

Region 3
Within the region: (800) 438-2474
Outside the region: (215) 814-5000

Contact Region



Site Inspection
Preliminary Assessment
Final Listing On NPL

Contaminants & Health Effects

      Endocrine Disrupter
      Reproductive Toxin
      Persistent, bioaccumulative and toxic


        African American
        American Indian and Alaska Native
        Native Hawaiian


        People living
        within a 1 mile radius


        Average Income


        Occupied homes

        Potentially Responsible Parties

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