March 2007 monitoring results for Centralia, Kansas.

LaFreniere, L. M.

Argonne National Laboratory

关键词: Monitoring;    Ground Water;    Kansas;    Sampling;    Storage Facilities;   

DOI  :  10.2172/918451
RP-ID  :  ANL/EVS/AGEM/TR-07-08
RP-ID  :  DE-AC02-06CH11357
RP-ID  :  918451

美国|其它

来源: UNT Digital Library

【 摘 要 】

In September 2005, periodic sampling of groundwater was initiated by the Commodity Credit Corporation of the U.S. Department of Agriculture (CCC/USDA) in the vicinity of a grain storage facility formerly operated by the CCC/USDA at Centralia, Kansas. The sampling at Centralia is being performed on behalf of the CCC/USDA by Argonne National Laboratory, in accord with a monitoring program approved by the Kansas Department of Health and Environment (KDHE). The objective is to monitor levels of carbon tetrachloride contamination identified in the groundwater at Centralia (Argonne 2003, 2004, 2005a). Under the KDHE-approved Monitoring Plan (Argonne 2005b), the groundwater is being sampled twice yearly (for a recommended period of two years) for analyses for volatile organic compounds (VOCs), as well as measurement of selected geochemical parameters to aid in the evaluation of possible natural contaminant degradation (reductive dechlorination) processes in the subsurface environment. The sampling is presently conducted in a network of 11 monitoring wells and 5 piezometers (Figure 1.1), at locations approved by the KDHE (Argonne 2006a). The results of groundwater sampling and VOCs analyses in September-October 2005, March 2006, and September 2006 were documented previously (Argonne 2006a,b). The results have demonstrated the presence of carbon tetrachloride contamination, at levels exceeding the KDHE Tier 2 Risk-Based Screening Level of 5 {micro}g/L for this compound, in a broad groundwater plume that has shown little movement. This report presents the results of the groundwater sampling at Centralia in March 2007, performed in accord with the KDHE-approved Monitoring Plan (Argonne 2005b). The March 2007 sampling represents the fourth monitoring event performed under the recommended two-year monitoring program approved by the KDHE. A final sampling event under this program is scheduled for September 2007.