• TYBOUTS CORNER LANDFILL, NEW CASTLE County, DE

Stage of Clean-up: Construction Completed

Conditions at listing (October 1981): Tybouts Corner Landfill, New Castle County, Delaware, is the site of a former sand and gravel operation. From 1969 to 1971, the 50-acre site, which is privately owned, accepted municipal and industrial wastes. Surface water and ground water are contaminated with hazardous organic and inorganic substances. The area is highly dependent on ground water. In 1976, the State issued demand letters to parties responsible for wastes associated with the site and requested that they take measures to remedy the ground water contamination problem. The parties refused to take responsibility. This is the top priority site in Delaware. Status (July 1983): In January 1983, EPA signed a $755,000 Superfund State Contract with Delaware for a remedial investigation to determine the type and extent of contamination at the site and a feasibility study to identify alternatives for remedial action. The work is scheduled to be completed in the second quarter of 1984. The Department of Justice, on behalf of EPA, has brought a Federal civil action seeking injunctive relief against parties responsible for wastes associated with the site.

Sources of Contamination:

• Landfill

The site was ranked on the NPL in 1983 due to a threat of contamination of the regional aquifer, the primary source of water in this region in Delaware. The site also presented a threat to domestic wells in the immediate vicinity. In 1985, EPA installed a water line to supply homes in the vicinity of the site with public water. The contaminants of concern include 1,2-DICHLOROETHANE, VINYL CHLORIDE, BENZENE and various other organic and inorganic chemicals.

Contaminants Detected
	Ground Water	Surface Water	Air	Soil	Other
ARSENIC	X	X
BARIUM	X
BENZENE	X	X	X
CYCLOHEXANE		X
DICHLOROMETHANE	X	X
ETHYLBENZENE		X
LEAD	X	X
TOLUENE	X
TRICHLOROFLUOROMETHANE	X
VINYL CHLORIDE	X	X
VOLATILE ORGANIC COMPOUNDS			X

Groundwater and Drinking Water
Were drinking water wells shut down due to contamination?	Yes
Population served by the wells now shut down:	25 - 100
Are drinking water wells potentially threatened?	No
Aquifer discharges into:	Surface water
Population served by water wells in the aquifer:	0

List ground water uses.

EPA Hazard Ranking System scores for TYBOUTS CORNER LANDFILL:

Less Hazard

National Average

More Hazard

0%					50%					100%

Overall site:

Surface water migration:

Ground water migration:

Air migration:

Rank Superfund sites in the U.S., DELAWARE, or in NEW CASTLE County by EPA Hazard Ranking Scores.

*Note: EPA's Hazard Ranking System is designed to screen and prioritize sites for the Superfund program, based on limited data available at time of listing. These scores are not based on a comprehensive risk assessment of the site and do not reflect conditions after initiation of cleanup work.

Number of PRPs currently associated with this site:	34
Hazardous waste received from off-site generators/transporters?	Yes
Number of past and present PRPs who contributed less than 1% of the waste:	11 - 50
Number of owners/operators which are also municipalities:	1
Percent of waste at the site that is municipal solid waste:	76 - 99%

EPA Site Information

• NPL Fact Sheet
• Record of Decision (ROD) Abstracts
• NPL Site 5 Year Reviews
• Comprehensive Environmental Response, Compensation, and Liability Information System (CERCLIS) Hazardous Waste Site Information
• Superfund Hazardous Waste Site Advanced Query Form

Scorecard reports for NEW CASTLE County on:

• Potential Sources of Land Contamination
• Criteria Air Pollutants
• Hazardous Air Pollutants