Results Of Groundwater Monitoring for The 183-H Solar Evaporation Basins And 300 Area Process Trenches January-June 2010

Technical Report · Sun Nov 07 04:00:00 EST 2010

DOI:https://doi.org/10.2172/1000065· OSTI ID:1000065

Weekes, D. C. ^[1]

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1. Hanford Site (HNF), Richland, WA (United States)

This is one of a series of reports on Resource Conservation and Recovery Act of 1976 monitoring at the 183-H Solar Evaporation Basins and the 300 Area Process Trenches. It fulfills the requirement of Washington Administrative Code (WAC) 173-303-645(11) to report twice each year on the effectiveness of the corrective action program. This report covers the period from January through June 2010. The concentrations of 183-H Solar Evaporation Basins contaminants remained below applicable concentration limits during the reporting period. The most recent exceedance of a concentration limit was May 2007. The overall concentration of uranium in 300 Area Process Trenches wells remained above the 20 μg/L concentration limit in the three downgradient wells screened at the water table. Fluctuations of uranium concentration are caused by changes in river stage. The concentration of cis-l ,2-dichloroethene remained above the 70 {micro}g/L concentration limit in one deep well (399-1-16B). Concentrations are relatively steady at this well and are not affected by river stage. Trichloroethene concentrations were below detection limits in all wells during the reporting period.

• Research Organization: Hanford Site (HNF), Richland, WA (United States)
• Sponsoring Organization: USDOE Office of Environmental Management (EM)
• DOE Contract Number: AC06-08RL14788
• OSTI ID: 1000065
• Report Number(s): SGW--47971 Rev 0
• Country of Publication: United States
• Language: English

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