Record of Decision System (RODS)
|Site Name:||H.O.D. LANDFILL|
|Address:||55 MCMILLAN ROAD|
|City & State:||ANTIOCH IL 60002|
|NPL Status:||Currently on the Final NPL|
|ROD Type:||Record of Decision|
|Media:||Air, Groundwater, Leachate, Sediment, Soil, Surface Water|
|Contaminant:||Base Neutral Acids, Dioxins/Dibenzofurans, Inorganics, Metals, PAH, PCBs, Pesticides, VOC|
Please note that the text in this document summarizes the Record of Decision for the purposes of facilitating searching and retrieving key text on the ROD. It is not the officially approved abstract drafted by the EPA Regional offices. Once EPA Headquarters receives the official abstract, this text will be replaced.
The H.O.D. Landfill Superfund site is located within the eastern boundary of the Village of Antioch in Lake County, in northeastern Illinois. The site consists of approximately 51 acres of landfilled area out of the total 121.5 acres of property that make up the facility. The landfilled area consists of two separate landfill areas. The "old landfill" consists of 24.2 acres situated on the western third of the property and the "new landfill" consists of 26.8 acres located immediately east of the old landfill. The two landfill areas have been legally delineated under an Illinois Environmental Protection Agency (IEPA) permit. The site was closed and capped under IEPA permitting in 1989.
The site is surrounded by the Little Silver Lake Subdivision in unincorporated Lake County, agricultural land, scattered residential areas, undeveloped land, and a large industrial park area (Sequoit Acres Industrial Park). The site is bordered by Sequoit Creek, and Silver Lake is located approximately 200 feet southeast of the site. A large, seasonal wetland area extends south of the site from Sequoit Creek.
The Village of Antioch obtains its water from six water supply wells screened in the deep sand and gravel aquifer. This is the same aquifer under and adjacent to the site. Future groundwater use is expected to be similar to current use. Approximately 40 private wells and six public water supply wells are in the vicinity, and are used for domestic purposes, including drinking water.
Permitted waste disposal activities began at the site in approximately 1963 and continued through approximately 1984. The site has been owned and/or operated by the three distinct companies: Cunningham Cartage and Disposal Company (1963-1965), H.O.D. Disposal, Inc. (1965-1972), and C.C.D. Disposal, Inc. (1972-present, including merger with Waste Management of Illinois, Inc. (WMII)). Solvents, heavy metals, and cutting and hydraulic oils were disposed of at the site, in addition to municipal waste.
The landfill cover is continuous across the filled areas of the site. Refuse was generally encountered beneath the existing landfill cover, which supports a healthy vegetative layer. Since the closure and capping of the site in 1989, precipitation has resulted in erosional rills and gullies in some areas of the landfill cover. Several areas of differential settlement and stressed vegetation have developed since the cap construction. Minor leachate seeps, animal burrows, and landfill gas (LFG) emission areas have also been noticed since the cap construction.
The Environmental Protection Agency (EPA) conducted a Preliminary Assessment in 1983, a Site Inspection in 1984, and an Expanded Site Inspection between 1986 and 1989. In 1989, the site was closed, and a landfill cover, leachate wells, and LFG vents were installed in accordance with the applicable regulations in force at the time. An Administrative Order on Consent (AOC) to perform the Remedial Investigation/Feasibility Study (RI/FS) was signed between the EPA and WMII in August 1990. A Record of Decision (ROD) was issued in September 1998.
The selected remedy is a final site-wide remedy. The selected remedy addresses the sources of the contamination by containment of the landfill and contaminated soils, and treatment of leachate and landfill gas. The Environmental Protection Agency (EPA) selects the following set of alternatives for the remediation of the site: C1 (landfill cap restoration and maintenance); G3 (active site upgrade of the landfill gas system); LC4 (active leachate extraction); LT1 (continue to discharge leachate to a Public Owned Treatment Works (POTW)); and GW2 (monitored natural attenuation of groundwater).
The selected remedy alternatives are integrated in that all of the selected remedy alternatives must be implemented to ensure that there is adequate protection to human health and the environment. The major components of the selected remedy for the site include: waste cap improvements, enhanced gas collection and treatment, enhanced leachate collection, leachate treatment, groundwater monitored natural attenuation, and institutional controls. The selected remedial action will address the low level threat of contaminated groundwater posed by the site. Since there are no principal threats from the site, treatment of the waste mass was not included in the selected remedy. The selected remedy also includes institutional controls and site access restrictions.
Estimated Capital Costs: $1,370,000
Estimated Annual O&M Costs: $72,000
Estimated Present Worth Costs: $2,270,000
Estimated Present Worth O&M Costs: $900,000
Estimated Capital Costs: $924,000
Estimated Annual O&M Costs: $35,000
Estimated Present Worth Costs: $1,358,400
Estimated Present Worth O&M Costs: $434,400
Estimated Capital Costs: $439,000
Estimated Annual O&M Costs: $60,000
Estimated Present Worth Costs: $1,183,600
Estimated Present Worth O&M Costs: $744,600
Estimated Capital Costs: $0
Estimated Annual O&M Costs: $66,800
Estimated Present Worth Costs: $829,00
Estimated Present Worth O&M Costs: $829,600
Estimated Capital Costs: $723,600
Estimated Annual O&M Costs: $69,700
Estimated Present Worth Costs: $1,588,600
Estimated Present Worth O&M Costs: $865,000
The net present worth of the selected remedy is $7,229,600.
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