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Congressional District # 14


EPA ID# OHD980611909
Last Updated: April, 2015

Site Description

The Diamond Shamrock Painesville Works site is an approximately 1100-acre former chemical manufacturing facility located in Lake County, Ohio.  The Diamond Shamrock Painesville Works facility operated from 1912 through 1977 and manufactured a variety of products including soda ash, baking soda, chromium compounds, carbon tetrachloride, hydrochloric and sulfuric acids, chlorinated wax, and coke.  The portion of the Painesville Works where chromium wastes were landfilled has been designated as operable unit (OU) 16 by the Ohio EPA. 

Historical activities at the Diamond Shamrock-Former Chromium Disposal Area Site include operation of the former Chrome Plant, Settling Basin 2, a "milk of lime" pond, and a surface water runoff basin.  The Chrome Plant operated between 1931 and 1972, and its primary products included sodium chromate, chromic acid, and potassium bichromate.  Chromite ore processing residuals were generated throughout the plan's operation and were placed in piles adjacent to the Chrome Plant buildings.  A retention basin was constructed in the 1950's to collect surface water runoff that came into contact with the chromite ore processing residuals.  Water that collected in the impoundment was treated at the Chrome Plant and discharged to a settling basin.

Wastewater from the Chrome Plant was treated with sulfur dioxide to reduce hexavalent chromium to trivalent chromium.  The wastewater was then treated with lime in a "milk of lime" process that precipitated chromium (III) hydroxide compounds.  Settling Basin 2 was located west of the Chrome Plant.  This basin was used to treat soda ash byproducts from the Solvay process.  The water was treated prior to being discharged to the Hydroretention Basin in an adjacent parcel.  Settling Basin 2 operated from approximately 1920 to 1935.  In 1975, chromite ore processing residuals were placed on portions of Settling Basin 2, which had long since dewatered.

OU 16 is located in the south central portion of the Site and is the site of a former Solvay settling basin and chromite ore processing residuals disposal site.  Following cessation of manufacturing operations, OU 16 was permitted as a fly ash landfill and received as much as 740,000 cubic yards of fly ash.  Following disposal of fly ash at the Site, a clay cap was constructed over the landfill to prevent contact with both the fly ash and the chromite ore processing residuals.  Currently, the landfill is covered with grass and regularly mowed.  Chromium seeps have developed along the steep, southeastern slope of the landfill area.

Site Responsibility

The Diamond Shamrock Painesville Works Site is being addressed by a potentially responsible party under state (Ohio EPA) oversight.  Biannual groundwater sampling continues.  The current AOC order expired in 2013.  Discussions with OEPA indicate that the biannual groundwater sampling will be rolled into a state order with the PRPs. Until the OEPA gets the State order in place an extension to the AOC was negotiated - documentation is still pending - contact the ORC attorney for additional information.

Threats and Contaminants

The primary threat at the Site is direct contact and ingestion of hexavalent chromium by humans and animals in the area where the seeps are located (the steeply-sloped southeastern side of the landfill) and in the sediments and surface water in the Grand River, which is adjacent to OU 16.

Cleanup Progress

Sheet piling has been installed to control the seeps.  Extraction wells located behind (upgradient from) the sheet piling are used to extract the contaminated ground water and prevent overtopping of the sheet piling.  Seeps have not been observed since this system was put in place in early 2006.  Site cleanup continues under the direction of the Ohio EPA.

Property Reuse

OU 16 is in the process of being developed for reuse as a golf course.  An interim action work plan describing the OU 16 redevelopment activities was submitted in June 2006 and is in the process of review and approval by Ohio EPA and the United States Environmental Protection Agency.  The golf course is part of a much larger redevelopment project that will encompass the entire 1100-acre former facility.  In recent years due to economic issues the development has not been completed.


Remedial Project Manager, U.S. EPA
linda martin (martin.lindab@epa.gov)
(312) 886-3854





Site Profile Information

This profile provides you with information on EPA's cleanup progress at this Superfund site.


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