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Nov 28, 2021, 2:01 am

Ogallala Ground Water Contamination Superfund National Priorities List (NPL) Site

EPA Identifier: NED986369247
CERCLIS ID: NED986369247
Location:
41.123889, -101.736111

Address:
SW CORNER OF W 1ST & C ST
Ogallala, NE

Final Date: 19941216


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Programs: {CERCLIS,ICIS}
Program Interests:
FORMAL ENFORCEMENT ACTION, SUPER

Site Summary:
Federal Register Notice:  December 16, 1994

Conditions at Proposal (October 14, 1992): The Ogallala Ground Water Contamination site is in the western part of Ogallala, Keith County, Nebraska, along the South Platte River. Land in the area is primarily used for industrial, commercial, and residential purposes. In 1987, the Nebraska Department of Health (NDH) detected various chlorinated organic compounds in five of the nine municipal wells serving Ogallala. Subsequent investigations identified ten companies as possible sources of the ground water plume and more have been suggested. Two companies have been studied in some detail.

Since 1987, American Shizuki Corp. has manufactured electrical components on an approximately 15-acre property at 301 West O Street. TRW, Inc., owned and operated the facility from the early 1960s through 1986. Operations involved various organic solvents, including trichloroethene (TCE) and 1,1,1-trichloroethane (TCA).

Since the early 1960s, Ogallala Electronics has manufactured electronics components on two parcels of land covering about 1 acre at 601 West 1st Street. Its operations also involve TCE and TCA.

A June 1990 Nebraska Department of Environmental Control (NDEC) soil-gas survey in Ogallala detected significant concentrations of TCE, TCA, and other chlorinated organic compounds on the properties of both companies. In mid-1991, NDEC detected similar compounds in monitoring wells in and around both properties, and in two Ogallala municipal wells. Earlier (1990), NDEC had detected similar compounds in six private wells. An estimated 5,100 people obtain drinking water from public and private wells within 4 miles of the site. Wells are also used for irrigation.

The 1990 soil-gas survey had identified additional potential sources of the contamination of Ogallala's wells. They will be investigated in the Remedial Investigation/Feasibility Study that typically follows listing.

Status (December 1994): The Remedial Investigation (RI) was started during the fourth quarter of 1994. The search for Potentially Responsible Parties (PRPs) is underway.

Institutional Controls:
Media Where IC Applies
(Multiple entries where more than one pathway is impacted)
Restriction Type Instrument
expand Ground Water
Prohibit Ground Water Well Installation/Construction
PROHIBIT GROUND WATER WELL INSTALLATION/CONSTRUCTION (City of Ogallala, Wellhead Protection Plan [pg.11 in pdf file] Section 3.020: City of Ogallala - Ordinances) The CITY has developed a detailed backflow prevention program, with the adoption of Ordinances 973, 1212 and 1222, and were codified into the CITY Municipal Code Section 52.060 through 52.073 and is attached as Appendix F. The purpose of the program is to protect the public water supply from the possibility of contamination by isolating real or potential sources of contamination or pollution, which may backflow into the PWSS. The CITY has developed a WHPP with a wellhead encroachment component to protect its municipal wells, with the adoption of Ordinance 1231, and was codified into the CITY Municipal Code Section 52.050 throuth 52.055 and is attached as Appendix G. The purpose of the Ordinance is to provide minimum setback distances for certain activities or facilities, such as chemical or fuel storage, from municipal wells. On January 23, 2001, the City of Ogallala adopted a well restriction ordinance (52.048). This ordinance prohibits the drilling, construction, or use of private wells on any private property within the city if the water is being used for human consumption and has been determined by proper authority not to meet safe drinking water requirements. The Municipal Code also establishes a permit process to drill a non-drinking water private well within city limits.
 
Please Click Here to View Document
Document Issuance, Implementation  March 28, 2006  [91 pages, 5,813.5Kb   ]
 
Ground Water
Limit Ground Water Use Activities
LIMIT GROUND WATER USE ACTIVITIES (City of Ogallala, Wellhead Protection Plan, [pg.11 in pdf file] Section 3.020: City of Ogallala - Ordinances) The CITY has developed a detailed backflow prevention program, with the adoption of Ordinances 973, 1212 and 1222, and were codified into the CITY Municipal Code Section 52.060 through 52.073 and is attached as Appendix F. The purpose of the program is to protect the public water supply from the possibility of contamination by isolating real or potential sources of contamination or pollution, which may backflow into the PWSS. The CITY has developed a WHPP with a wellhead encroachment component to protect its municipal wells, with the adoption of Ordinance 1231, and was codified into the CITY Municipal Code Section 52.050 throuth 52.055 and is attached as Appendix G. The purpose of the Ordinance is to provide minimum setback distances for certain activities or facilities, such as chemical or fuel storage, from municipal wells. On January 23, 2001, the City of Ogallala adopted a well restriction ordinance (52.048). This ordinance prohibits the drilling, construction, or use of private wells on any private property within the city if the water is being used for human consumption and has been determined by proper authority not to meet safe drinking water requirements. The Municipal Code also establishes a permit process to drill a non-drinking water private well within city limits.
 
Please Click Here to View Document
Document Issuance, Implementation  March 28, 2006  [91 pages, 5,813.5Kb   ]