Prepared By:
Woodard & Curran
Document Type
Government Report
Publication Date
Spring 3-2025
Subject Area
Butte
Recommended Citation
Stoy, Paddy, "TECHNICAL MEMORANDUM - RE: 2022 Butte Priority Soils Operable Unit (BPSOU) Groundwater Compliance Evaluation" (2025). Silver Bow Creek/Butte Area Superfund Site. 1293.
https://digitalcommons.mtech.edu/superfund_silverbowbutte/1293
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.
Included in
Environmental Health and Protection Commons, Environmental Indicators and Impact Assessment Commons, Environmental Monitoring Commons
Comments
In accordance with Section 2.2.1.1 item 5 of Attachment B.1 of Appendix D to the Butte Priority Soils Operable Unit (BPSOU) Consent Decree (EPA 2020) this Compliance Evaluation Technical Memorandum compares the 2022 groundwater sampling data to the BSPOU groundwater quality Performance Standards. This Groundwater Compliance Evaluation Technical Memorandum is a stand-alone document separate from the annual Groundwater Data Summary Report. The 2022 BPSOU Groundwater Monitoring Data Summary Report (Groundwater DSR) (AR 2023) contains validated contaminant of concern (COC) sampling results from all groundwater monitoring wells for the 2022 calendar year. This Compliance Evaluation Technical Memorandum summarizes and compares the validated groundwater sampling results at the point of compliance (POC) locations identified in the 2022 BPSOU Site-Wide Interim Groundwater Monitoring Quality Assurance Plan (Groundwater QAPP) (AR, 2022) to the groundwater quality Performance Standards as defined in the BPSOU Record of Decision (ROD) (EPA 2006). Groundwater quality Performance Standards are provided in Section 2.2 of this Technical Memorandum. The total number of COC exceedances for each contaminant of concern, if any, will be derived and presented in this Technical Memorandum.