Powhattan USDA Site


Site Background

The Powhattan USDA site (Site) is located at the northeastern edge of Powhattan in the northeast quarter of the southwest quarter of Section 28, Township 3 South, Range 16 East, in Brown County, Kansas.

The Site was identified as a potential source area during 1986 statewide water supply sampling conducted by KDHE which identified low-level carbon tetrachloride (CT) contamination in PWS #1. The Site was used as a grain storage facility from 1949 to approximately 1966. The Site is currently occupied by Ag Partners Coop.

Several investigations were conducted between 1987 and 2005 which identified CT, ethylene dibromide (EDB), and nitrate contamination near the former CCC/USDA facility and existing Ag Partners facility with CT concentrations above Risk-based Standards Kansas (RSK) of 5 g/L; 20 out of the 30 sample locations that exceeded RSK were on or near the former Powhattan USDA location. Soil and groundwater sampling conducted by KDHE in 2005 indicated that both CCC/USDA and Ag Partners are responsible for the CT contamination at the site, and that Ag Partners is responsible for the EDB and nitrate contamination. The city of Powhattan was connected to the Brown County Rural Water District (RWD) #2 system in June 1995.

KDHE is soliciting public comments regarding proposed remedial actions. The draft Corrective Action Decision (CAD) summarizes information from documents including the results of the 2007 Investigation of Potential Contamination and Corrective Action Study (CAS) report; briefly describes the alternatives for remediation detailed in the CAS report; and identifies and describes KDHE's preferred remedy for addressing Site contamination. The CAD is available for public review from October 16 to November 15, 2020, at the KDHE offices in Topeka and at the Hiawatha City Hall; 701 Oregon St. Hiawatha, Kansas 66434. Appointments to review documents in Hiawatha are not needed, as the City Hall is open Monday - Friday, 8 am to 5 pm. Appointments to review documents in Topeka may be made by contacting Ken Diediker at 785-296-0291.

Public comments can be submitted to: Ken Diediker, KDHE Bureau of Environmental Remediation, 1000 SW Jackson Street, Suite 410, Topeka, KS 66612 or kenneth.diediker@ks.gov. Comments will be accepted from October 16 through November 15, 2020. The deadline to submit comments is November 15, 2020 at 5:00pm Central Time. Comments may be submitted by e-mail or written mail.


Additional Information

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KDHE Site Documents