This ICN updates the assessment plan to reflect the current wells in the monitoring system and the current constituent list and sampling schedule for WMA U.
This ICN updates the assessment plan to reflect the current wells in the WMA U monitoring system and to revise the analyte list. This document was prepared under the Groundwater Remediation and Closure Assessment Projects, and reflects the requirements of the Groundwater Performance Assessment Project Quality Assurance Plan (PNNL-15014).
This ICN updates the assessment plan to reflect the addition of wells newly installed in FY2001. Project scientists will provide a schedule change request identifying the wells as new and providing a list of constituents and sample frequencies to the sample scheduler.
Pacific Northwest National Laboratory conducted a first determination groundwater quality assessment at the Hanford Site. This work was performed for the U.S. Department of Energy, Richland Operations Office, in accordance with the Federal Facility Compliance Agreement during fiscal year (FY) 1996-1997. The purpose of the assessment was to determine if waste from the Single-Shell Tank (SST) Waste Management Area (WMA) B-BX-BY had entered the groundwater at levels above the drinking water standards (DWS). The resulting assessment report documented evidence demonstrating that waste from the WMA has impacted groundwater quality (Narbutovskih 1998). The WMA is located in the northwest corner of the 200 East Area and consists of the 241-B, 241-BX, and 241-BY Tank Farms and ancillary waste systems (Figure 1.1). The unit is regulated under Resource Conservation and Recovery Act (RCRA) interim-status regulations (40 CFR 265, Subpart F) and was originally placed in assessment groundwater monitoring (40 CFR 265.93 [d]) in June 1996 when elevated conductivity in downgradient monitoring well 299-E33-32 was confirmed by verification sampling. A rise in conductivity was initially observed in this well in February 1996.
Pacific Northwest National Laboratory conducted a Phase 1 (or first determination) groundwater quality assessment for the US Department of Energy, Richland Operations Office, in accordance with the Federal Facility Compliance Agreement. The purpose of the assessment was to determine if the Single-Shell Tank Waste Management Area (WMA) B-BX-BY has impacted groundwater quality. This report will document the evidence demonstrating that the WMA has impacted groundwater quality.
Single Shell Tank Waste management Area S-SX has been placed into groundwater quality assessment monitoring under interim- status regulations by direction from the State of Washington Department of Ecology. This document presents background and an assessment groundwater monitoring plan to evaluate any impacts of risks/spills from these Single Shell Tanks in WMA S-SX or groundwater quality.