Repository. Monthly, quarterly, and annual inspections of the repository ensure that remedy controls remain intact and that the waste remains isolated from the environment. Inspection observations and maintenance activities for the reporting period are: • No anomalous conditions were observed at the repository with respect to the surveillance items included in the LTS&M repository area surveillance checklists (attached for this quarter in Appendix A). • Water accumulation in Pond 4 has increased with the start-up of the OU III groundwater contingency remedy optimization system. Approximately 4 feet of water was in the pond at the time of the March monthly pond inspection. Monthly Pond 4 surveillance checklists are attached for this quarter in Appendix A. • Leachate production from the repository was normal. Leachate production is about 1,000 gallons per week combined for LCRS sumps LCRS 1 and LCRS 2. See Appendix B for a graphical depiction of leachate production history. • Inspection and repairs were performed of the primary Pond 4 liner in 2013 and 2014. However, operation of the OU III groundwater contingency remedy optimization system has resulted in increased water collection in the Pond 4 LCRS. The LCRS recirculation system is operating as intended and the action level leakage rate, as described in Section 3.4 of the LTS&M Plan, has not been exceeded. Pond 4 LCRS performance history is summarized as a graph in Appendix B. • The lower sumps (LDS) for the repository and Pond 4 received no water during the quarter. This is the normal condition. Graphs showing the performance history for the repository LDS and the Pond 4 LDS are included in Appendix B. • Approximately 190 gallons of water was pumped from the repository LDS 2 sump in January 2015 during routine pump control maintenance activities. The water removed is considered remnant from past testing activities, rather than liner leakage. Historic water levels in the sump have remained essentially static.
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Repository. Monthly, quarterly, and annual inspections of the repository ensure that remedy controls remain intact and that the waste remains isolated from the environment. Inspection observations and maintenance activities for the reporting period arequarter are as follows: • No area of the cover indicated settling, slumping, fracturing, seepage, ponding, or significant erosion. • No anomalous surface feature conditions were observed at the repository with respect disposal cell or Pond 4. Surveillance checklists for this quarter are attached as Appendix A. • The minor burrowing on the disposal cell and the Pond 4 berm by voles and small ground squirrels was not observed this quarter due to the surveillance items included depth of snow that covers both the disposal cell and Pond 4 berms. Previously observed xxxxxxx were not deep and did not pose a concern. • The disposal cell LCRS and LDS were operated in accordance with the requirements specified in the LTS&M repository area surveillance checklists (attached Plan. Findings for the disposal cell LCRS and LDS this quarter in Appendix A). • Water accumulation in Pond 4 has increased with the start-up of the OU III groundwater contingency remedy optimization system. Approximately 4 feet of water was in the pond at the time of the March monthly pond inspection. Monthly Pond 4 surveillance checklists are attached for this quarter in Appendix A. • period include: Leachate production from the repository disposal cell was normal. Leachate production is about 1,000 approximately 600 gallons per week combined for LCRS sumps LCRS 1 and LCRS 2. There is no action level for the disposal cell LCRS. See Appendix B for a graphical depiction of leachate production history. The disposal cell LDS continues to receive no water; therefore, the disposal cell LDS action level was not exceeded. See Appendix B for a graphical depiction of leachate production history. • Inspection and repairs were performed Operation of the primary Pond 4 liner in 2013 and 2014. However, operation of the OU III groundwater contingency remedy optimization GRO system has resulted in increased water collection in the Pond 4 LCRSLCRS and LDS. The However, the Pond 4 LCRS recirculation system is operating and LDS monitoring and pumping systems continue to function as intended designed, to circulate water back to the pond. Findings for the Pond 4 LCRS and LDS this period include: Water collection at the Pond 4 LCRS continued to exceed the action level leakage rate, as described in Section 3.4 between January and March (see Appendix B). LM has previously notified EPA and UDEQ of the LTS&M Plan, has not been exceeded. this Pond 4 LCRS performance history is summarized as a graph action level exceedance. Water collection in Appendix B. • The lower sumps (LDS) for the repository and Pond 4 received no water during the quarter. This is the normal condition. Graphs showing the performance history for the repository LDS and the Pond 4 LDS are included in remained below the action level (see Appendix B. • Approximately 190 gallons B). LM has previously notified EPA and UDEQ of water was pumped from the repository LDS 2 sump in January 2015 during routine pump control maintenance activities. The water removed is considered remnant from past testing activities, rather than liner leakage. Historic water levels collection and removal in the sump have remained essentially static.Pond 4 LDS. U.S. Department of Energy Monticello NPL Sites FFA Quarterly Report: January 1–March 31, 2019 May 2019 Doc. No. S25044
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Samples: www.lm.doe.gov
Repository. Monthly, quarterly, and annual inspections of the repository ensure that remedy controls remain intact and that the waste remains isolated from the environment. Inspection observations and maintenance activities for the reporting period arequarter are as follows: • No area of the cover indicated settling, slumping, fracturing, seepage, ponding, or significant erosion. • No anomalous surface feature conditions were observed at the repository disposal cell and Pond 4. Surveillance checklists for this quarter are attached as Appendix A. • Minor burrowing on the disposal cell and the Pond 4 berm by voles and small ground squirrels continue to be observed. These xxxxxxx are not deep and do not pose a concern. • The disposal cell LCRS and LDS were operated in accordance with respect to the surveillance items included requirements specified in the LTS&M repository area surveillance checklists (attached for this quarter in Appendix A)Plan. • Water accumulation in Pond 4 has increased with the start-up of the OU III groundwater contingency remedy optimization system. Approximately 4 feet of water was in the pond at the time of the March monthly pond inspection. Monthly Pond 4 surveillance checklists are attached for this quarter in Appendix A. • Findings include: Leachate production from the repository disposal cell was normal. Leachate production is about 1,000 approximately 1150 gallons per week combined for LCRS sumps LCRS 1 and LCRS 2. There is no action level for the disposal cell LCRS. See Appendix B for a graphical depiction of leachate production history. The disposal cell LDS continues to receive no water; therefore, the disposal cell LDS action level was not exceeded. See Appendix B for a graphical depiction of leachate production history. U.S. Department of Energy Monticello NPL Sites FFA Quarterly Report: July–September 2018 November 2018 Doc. No. S22073 • Inspection and repairs were performed Operation of the primary Pond 4 liner in 2013 and 2014. However, operation of the OU III groundwater contingency remedy optimization GRO system has resulted in increased water collection in the Pond 4 LCRSLCRS and LDS. The Pond 4 LCRS recirculation system is operating and LDS monitoring and pumping systems are functioning as intended and to circulate water back to the pond. Water collection at the Pond 4 LCRS exceeded the action level leakage rate, as described between July and August but was below the action level in Section 3.4 September (see Appendix B). LM has previously notified EPA and UDEQ of the LTS&M Plan, has not been exceeded. this Pond 4 LCRS performance history is summarized as a graph action level exceedance. Water collection in Appendix B. • The lower sumps (LDS) for the repository and Pond 4 received no water during the quarter. This is the normal condition. Graphs showing the performance history for the repository LDS and the Pond 4 LDS are included in remained below the action level (see Appendix B. • Approximately 190 gallons B). LM has previously notified EPA and UDEQ of water was pumped from the repository LDS 2 sump in January 2015 during routine pump control maintenance activities. The water removed is considered remnant from past testing activities, rather than liner leakage. Historic water levels collection and removal in the sump have remained essentially staticPond 4 LDS.
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Repository. Monthly, quarterly, and annual inspections of the repository ensure that remedy controls remain intact and that the waste remains isolated from the environment. Inspection observations and maintenance activities for the reporting period arequarter are as follows: • No area of the cover indicated settling, slumping, fracturing, seepage, ponding, or significant erosion. • No anomalous surface feature conditions were observed at the repository disposal cell and Pond 4. Surveillance checklists for this quarter are attached as Appendix A. • Minor burrowing on the disposal cell and the Pond 4 berm by voles and small ground squirrels continue to be observed. These xxxxxxx are not deep and do not pose a concern. • The disposal cell LCRS and LDS were operated in accordance with respect to the surveillance items included requirements specified in the LTS&M repository area surveillance checklists (attached for this quarter in Appendix A)Plan. • Water accumulation in Pond 4 has increased with the start-up of the OU III groundwater contingency remedy optimization system. Approximately 4 feet of water was in the pond at the time of the March monthly pond inspection. Monthly Pond 4 surveillance checklists are attached for this quarter in Appendix A. • Findings include: ⎯ Leachate production from the repository disposal cell was normal. Leachate production is about 1,000 approximately 1150 gallons per week combined for LCRS sumps LCRS 1 and LCRS 2. There is no action level for the disposal cell LCRS. See Appendix B for a graphical depiction of leachate production history. ⎯ The disposal cell LDS continues to receive no water; therefore, the disposal cell LDS action level was not exceeded. See Appendix B for a graphical depiction of leachate production history. U.S. Department of Energy Monticello NPL Sites FFA Quarterly Report: July–September 2018 November 2018 Doc. No. S22073 • Inspection and repairs were performed Operation of the primary Pond 4 liner in 2013 and 2014. However, operation of the OU III groundwater contingency remedy optimization GRO system has resulted in increased water collection in the Pond 4 LCRSLCRS and LDS. The Pond 4 LCRS recirculation system is operating and LDS monitoring and pumping systems are functioning as intended and to circulate water back to the pond. ⎯ Water collection at the Pond 4 LCRS exceeded the action level leakage rate, as described between July and August but was below the action level in Section 3.4 September (see Appendix B). LM has previously notified EPA and UDEQ of the LTS&M Plan, has not been exceeded. this Pond 4 LCRS performance history is summarized as a graph action level exceedance. ⎯ Water collection in Appendix B. • The lower sumps (LDS) for the repository and Pond 4 received no water during the quarter. This is the normal condition. Graphs showing the performance history for the repository LDS and the Pond 4 LDS are included in remained below the action level (see Appendix B. • Approximately 190 gallons B). LM has previously notified EPA and UDEQ of water was pumped from the repository LDS 2 sump in January 2015 during routine pump control maintenance activities. The water removed is considered remnant from past testing activities, rather than liner leakage. Historic water levels collection and removal in the sump have remained essentially staticPond 4 LDS.
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Repository. Monthly, quarterly, and annual inspections of the repository ensure that remedy controls remain intact and that the waste remains isolated from the environment. Inspection observations and maintenance activities for the reporting period arequarter are as follows: • No area of the cover indicated settling, slumping, fracturing, seepage, ponding, or significant erosion. • No anomalous surface feature conditions were observed at the repository with respect disposal cell or Pond 4. Surveillance checklists for this quarter are attached as Appendix A. • The minor burrowing on the disposal cell and the Pond 4 berm by voles and small ground squirrels was not observed this quarter due to the surveillance items included depth of snow that covers both the disposal cell and Pond 4 berms. Previously observed xxxxxxx were not deep and did not pose a concern. • The disposal cell LCRS and LDS were operated in accordance with the requirements specified in the LTS&M repository area surveillance checklists (attached Plan. Findings for the disposal cell LCRS and LDS this quarter in Appendix A). • Water accumulation in Pond 4 has increased with the start-up of the OU III groundwater contingency remedy optimization system. Approximately 4 feet of water was in the pond at the time of the March monthly pond inspection. Monthly Pond 4 surveillance checklists are attached for this quarter in Appendix A. • period include: ⎯ Leachate production from the repository disposal cell was normal. Leachate production is about 1,000 approximately 600 gallons per week combined for LCRS sumps LCRS 1 and LCRS 2. There is no action level for the disposal cell LCRS. See Appendix B for a graphical depiction of leachate production history. ⎯ The disposal cell LDS continues to receive no water; therefore, the disposal cell LDS action level was not exceeded. See Appendix B for a graphical depiction of leachate production history. • Inspection and repairs were performed Operation of the primary Pond 4 liner in 2013 and 2014. However, operation of the OU III groundwater contingency remedy optimization GRO system has resulted in increased water collection in the Pond 4 LCRSLCRS and LDS. The However, the Pond 4 LCRS recirculation system is operating and LDS monitoring and pumping systems continue to function as intended designed, to circulate water back to the pond. Findings for the Pond 4 LCRS and LDS this period include: ⎯ Water collection at the Pond 4 LCRS continued to exceed the action level leakage rate, as described in Section 3.4 between January and March (see Appendix B). LM has previously notified EPA and UDEQ of the LTS&M Plan, has not been exceeded. this Pond 4 LCRS performance history is summarized as a graph action level exceedance. ⎯ Water collection in Appendix B. • The lower sumps (LDS) for the repository and Pond 4 received no water during the quarter. This is the normal condition. Graphs showing the performance history for the repository LDS and the Pond 4 LDS are included in remained below the action level (see Appendix B. • Approximately 190 gallons B). LM has previously notified EPA and UDEQ of water was pumped from the repository LDS 2 sump in January 2015 during routine pump control maintenance activities. The water removed is considered remnant from past testing activities, rather than liner leakage. Historic water levels collection and removal in the sump have remained essentially static.Pond 4 LDS. U.S. Department of Energy Monticello NPL Sites FFA Quarterly Report: January 1–March 31, 2019 May 2019 Doc. No. S25044
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