Loading...
HomeMy WebLinkAboutDRC-2024-004410 DRC-20 195 North 1950 West • Salt Lake City, UT Mailing Address: P.O. Box 144880 • Salt Lake City, UT 84114-4880 Telephone (801) 536-0200 • Fax (801) 536-0222 • T.D.D. (801) 536-4284 www.deq.utah.gov Printed on 100% recycled paper State of Utah SPENCER J. COX Governor DEIDRE HENDERSON Lieutenant Governor Department of Environmental Quality Kimberly D. Shelley Executive Director DIVISION OF WASTE MANAGEMENT AND RADIATION CONTROL Douglas J. Hansen Director M E M O R A N D U M TO: Phil Goble FROM: Chris Leahy, PG DATE: October 31, 2023 SUBJECT: Review of the Rio Algom Mining, LLC. (“RAML”) Lisbon Facility 2023 Groundwater Monitoring Event, Field Inspection and Split Sampling, October 25, 2023. This is a Utah Division of Waste Management and Radiation Control (“Division”) staff summary on the inspection and split sampling that occurred on October 25, 2023, for the groundwater monitoring event (“Monitoring Event”) for RAML at the former Lisbon Valley Uranium Mill Facility (“Facility”). RAML is required to submit a written annual groundwater monitoring report of this monitoring event by March 1, 2024. The monitoring event was inspected against the following enforcement documents: • Rio Algom Mining LLC, July 31, 2015, Groundwater Monitoring Plan Lisbon Facility (“Plan”). • Utah Radioactive Materials License No. UT1900481, Amendment 6 (License). Summary of Inspection On October 25, 2023, Division staff Dean Henderson and Chris Leahy observed the RAML staff preform groundwater monitoring activities including the collection of groundwater samples from monitoring wells for the Facilty groundwater monitoring network. In addition, the Division staff collected a split sample from monitor wells RL-6 and H-63. A duplicate sample was collected at well H- 63 and is identified as EF-92. See the photographs of sampling activities in figures 1-5 in Attachment 1 below. Conclusion Based on Division staff observations of RAML staff performing the sampling and monitoring on October 25, 2023, it appears that RAML staff appropriately followed the field monitoring requirements Page 2 in the Plan and License. As stated above, RAML is required to submit a written report of this monitoring event before March 1, 2024. The Division will also review this report and will include split sample analysis for this monitoring event as part of that review to complete the inspection for this groundwater monitoring event. Page 3 References Rio Algom Mining LLC, July 31, 2015, Groundwater Monitoring Plan Lisbon Facility (“Plan”). Utah Radioactive Materials License No. UT1900481, Amendment 6 (License). Page 4 Attachment 1 Photographs of Sampling Activities Page 5 Figure 1. Location of RL-6 Figure 2. RAML sample collection at RL-6 Page 6 Figure 3. Division split sample collection at RL-6 Figure 4. Low flow sampling setup at H-63 Page 7 Figure 5. RAML sample collection at H-63