Site Narrative:
KDHE accepted the ADM Greensburg Facility property into the Voluntary Cleanup and Property Redevelopment Program (VCPRP) to address fertilizer contamination and pesticide/herbicide contamination identified during a Limited Site Investigation.
The ADM Greensburg (Site) is located at 15240 183 Hwy, Greensburg, Kansas. The 14 acre Site is bound by a Union Pacific rail line to the south. Highway 183 bounds the property to the west. Agricultural land also bounds the site to the north. The city of Greensburg is situated approximately one mile east of the Site on US Hwy 54. Historical and current uses of the Site consist of the storage, handling, and distribution of grain, seed, pesticides and fertilizers in bulk and prepackaged quantities.
According to the KGS the Site is underlain by Quaternary dune sand deposits situated within the Lower Arkansas River Basin. Well logs for the area documented alternating lithologies consisting of sands, silty sands, and some clayey sands to a depth of 100 feet below ground surface (bgs). Groundwater at the Site was documented at 78 feet bgs with a flow direction to the east. Greensburg receives its water from a series of Public Water Supply (PWS) wells situated within the city limits.
ADM conducted the Voluntary Cleanup Investigation (VCI) in multiple phases over a period of six years. Phase I activities were conducted May 2008, Phase II activities were conducted June 2009, and Phase III activities were conducted March 2011. Supplemental groundwater investigation activities, including two groundwater probes installed in source areas, and installation and sampling of three groundwater monitoring wells, were conducted October 2013 and August 2014. Contaminants of concern (COCs) consisted of total nitrogen [nitrite, nitrate, ammonia], pesticides, and herbicides. Source areas identified at the Site during the VCI included current and former bulk fertilizer storage and blending buildings, liquid fertilizer Aboveground Storage Tanks (ASTs) and the secondary containment structure, and former and current anhydrous ammonia storage areas.
49 soil borings were installed across the Site to varying depths ranging from 12 to 20 feet bgs. A total of 209 soil samples were collected for analysis in order to characterize soil impacts at the Site. Analytical results for the soil investigation identified total nitrogen concentrations exceeding the Risk Based Standard for Kansas (RSK) down to a depth of 20 feet bgs. A number of pesticides and herbicides were detected in surficial soil samples but not beyond 8 inches in depth. A total of 11 groundwater samples were collected for analysis. Nine groundwater samples were collected from an onsite supply well and onsite monitoring wells. Two groundwater samples were collected from groundwater probes. Analytical results from the groundwater samples indicated nitrate and ammonia concentrations were below the Maximum Contaminant Level (MCL) of 10 mg/l. Following completion of Phase III VCI activities, sufficient data had been collected to develop an Interim Soil Remediation Plan (ISRP).
The ISRP was approved by KDHE in June 2011 and soil excavation activities were implemented August 2011 through September 2011. A total of 9,620 tons of impacted soils were excavated and land applied in nearby fields as a beneficial reuse of the soils. Data collected during soil excavation activities estimated an approximate nitrogen mass of 9,448 pounds were removed from the Site. Residual soil impacts do remain at the site above regulatory thresholds with a maximum concentration of total nitrogen in soil at 527 mg/kg.
The residual soil impacts were addressed by placing EUCA 12-EUC-0017 on the property, thereby restricting property use to non-residential use. The EUCA was recorded on December 26, 2012. Inspections are on a 5-year frequency. The 2018 inspection found the owner to be complying with the terms of the EUCA. The structural impediments are still in place. |