OLEM/OSRTI Washington, DC 20460 

## N ATIONAL 

## P RIORITIES 

## L IST 

## (NPL)
*** Final Site *** April 2016 

### IOWA - NEBRASKA LIGHT & POW ER CO Norfolk, Nebraska Madison County  **Site Location :**  This s ite is located in the downtown area at the intersection of 7 th Street and Norfolk Avenue. The east and northeast portion of the s ite is currently owned by Black Hills/Nebraska Gas Utility Company LLC. The remainder of the s ite is owned by Nebraska Public Power District. The s ite is approximately 2 acres in size

.
 **Site History:** The s ite is a former manufactured gas plant. Waste products from the manufactured gas process are present in soil and ground water. The s ite is currently used as a concrete parking lot on the Black Hills portion and a fenced gravel lot on the Nebraska Public Power District portion. The s ite is located one

- half mile upgradient of the east municipal well field which supplies drinking water to the city of Norfolk. Ground water flow s to the east, migrating toward the east municipal well field

.  **Site Contamination/Contaminants:** Waste products from the manufactured gas process are present in soil and ground water at the s ite. Non

- aqueous phase liquid is present in significant quantities in ground water and is an ongoing source of contamination. Polycyclic aromatic hydrocarbons including benzo(a)pyrene and naphthalene, volatile organic compounds including benzene and other hazardous wastes, pollutants or contaminants from MGP

- related processes have been detected on the site above health

- based be nchmark levels

.  **Potential Impacts on Surrounding Community/Environment :**  On

- site deposition of coal tar waste has resulted in the migration of ground water contamination off s ite. The contamination may affect residential and municipal wells downgradient of the facility . G round water is used for drinking water.  **Response Activities (to date):** The p otentially responsible p arty, with the EPA ’s oversight, has conducted a removal action. The removal action consisted of building demolition and excavation and disposal of approximately 10,495 tons of contaminated material. The s ite was restored with a concrete parking lot on the Black Hills portion and a fenced gravel lot on the Nebraska Public Power District portion

.  **Need for NPL Listing:** The s tate of Nebraska referred the site to the EPA because the site requires response actions and listing on the NPL will provide for in v estigation and remediatio n of the site. Other federal an d state cleanup programs were evaluated, but are not viable options at this time

. Th e EPA received a letter of support for listing this site on the NPL from the s tate of Nebraska.

[The description of the site (release) is based on information available at the time the site was evaluated with the HRS. The description may change as additional information is gathered on the sources and extent of contamination. See 56 FR 5600, February 11, 1991, or subsequent FR notices.] For more information about the hazardous substances identified in this narrative summary, including general information regarding the effects of exposure to these substances on human health, please see the Agency for Toxic Substances and Disease Registry (ATSDR) ToxFAQs. ATSDR ToxFAQs can be found on the Internet at http://www.atsdr.cdc.gov/toxfaqs/index.asp or by telephone at 1

- 888

- 42

- ATSDR or 1

- 888

- 422

- 8737.