Interim-Status RCRA Groundwater Monitoring Plan for the 216-A-10, 216-A-36B, and 216-A-37-1 PUREX Cribs

Abstract

This document presents a groundwater monitoring program for three Resource Conservation and Recovery Act of 1976 (RCRA) waste management units at the Hanford Site combined under one groundwater quality assessment program. The units are the 216-A-10, 216-A-36B, and 216-A-37-1 cribs (the RCRA plutonium-uranium extraction [PUREX] cribs). The three cribs have been grouped together based on their proximity to one another, similar construction and waste history, and similar hydrogeologic regime. The RCRA PUREX cribs are located in the 200 East Area of the Hanford Site. This document replaces the previous RCRA monitoring plan (Lindberg 1997) for these cribs. There are other cribs in the 200 East Area that received liquid waste from PUREX Plant operations that are not regulated under RCRA (e.g., 216-A-45 crib). Wells in the vicinity of these cribs are monitored under the 200-PO-1 Groundwater Operable Unit. The monitoring network comprises near-field wells (wells located in the immediate vicinity of the RCRA PUREX cribs) and far-field wells (wells located farther downgradient). The monitoring strategy for the far-field wells is included in the Sampling and Analysis Plan for the 200-PO-1 Groundwater Operable Unit (DOE-RL 2003). The monitoring strategy for the near-field wells is included in this plan. Near-field wells are listed below.