Bella Vista Community Information Page

LATEST INFORMATION:

June 7 - 10, 2019 – Report of on-site work the Bella Vista POA has completed for Phase 1:

• Site materials were moved and processed from north to south
• Excavation was done on the northeastern perimeter of the site
• Site soil was compacted in lifts in the south-central portion of the site
• Smoke was apparent on June 10th in two small areas of the eastern drainage channel, which were in the process of being excavated
• Smoke was dissipated within a few feet of the emission point
• The same area where digital thermal readings on the surface on June 6th showed a small warm area in the eastern drainage channel that was overlain by what appears to be soil placed previously by others
• Temperatures at depth in this channel were reported to be 20 to 25 degrees above background temperatures for the Site at that time
• No elevated temperatures were reported on June 10th
• Air curtain technology was operating in accordance with manufacturers specifications and operates continuously
• Some water discharge occurred from the site primarily associated with storm water discharge
• The aeration system was operated to aerate the water prior to discharge through the weir
• Water samples were collected daily from the discharge point of the weir
• The modified air monitoring plan was implemented before, during, and after the daily work consistent with the Air Monitoring, Noise Monitoring, and Hazard Communication Plan
• A few instances of elevated particulate were detected on June 8th and June 9th associated with emissions from the air curtain technology

May 31 - June 2, 2019 – Report of on-site work the Bella Vista POA has completed for Phase 1:

• The Air Curtain Technology was reconstructed on June 1st as an approximate 30 ft x 12 ft x 15 ft deep configuration with some slope setbacks for stability. Initial operations on Saturday and Sunday were shown to have low emissions, consistent with the initial operations of May 26th
• Some water discharge is occurring from the site primarily associated with stormwater discharge
• The aeration system was operated to aerate the water prior to discharge through the weir
• Water samples are collected daily from the discharge point of the weir
• Air monitoring was performed before, during, and after the daily work consistent with the Air Monitoring, Noise Monitoring, and Hazard Communication Plan. The air quality measurements from May 30th to June 2 show no elevated concentrations of particulate above the action levels

May 28, 2019 – Report of on-site work the Bella Vista POA has completed for Phase 1:

• Excavation activities were performed
• Hot spots are being identified and addresses in the other areas, guided by thermal measurements
• Water discharge occurred from the site as a result of the rainfall and fire-fighting water
• Overnight crews continued to manage site security and addressed the potential for flare-ups
• Aeration system was operated to aerate the water prior to discharge through the weir
• Water samples are collected daily from the discharge point of the weir
• Air monitoring was performed before, during, and after the event consistent with the Air Monitoring, Noise Monitoring, and Hazard Communication Plan
• The air quality measurements from yesterday, May 27th, show a few locations with elevated concentrations of particulate above the action levels

May 27, 2019 – Report of on-site work the Bella Vista POA has completed for Phase 1:

• Excavation activities were performed
• Hot spots are being identified and addresses in the other areas, guided by thermal measurements
• An exploratory trench was dug near the southern boundary of the Site to identify background temperature readings
• The excavated materials had no evidence of burning or ash, and no smoke was observed
• Air Curtain Technology will be used 24/7 to address the accumulation of large tree trunks and stumps
• The Air Curtain Technology was re-loaded with material this morning, which caused a reduction in temperature and an increase in smoke emissions for a limited amount of time until temperatures increased to operating temperatures
• Water discharge occurred from the site as a result of the rainfall and fire-fighting water
• Overnight crews continued to manage site security and addressed the potential for flare-ups
• Aeration system was operated to aerate the water prior to discharge through the weir
• Water samples are collected daily from the discharge point of the weir
• Air monitoring was performed before, during, and after the event consistent with the Air Monitoring, Noise Monitoring, and Hazard Communication Plan
• The air quality measurements from yesterday, May 26th, show no exceedances of action levels

May 26, 2019 – Report of on-site work the Bella Vista POA has completed for Phase 1:

• Excavation activities were performed
• Air Curtain Technology will be used 24/7 to address the accumulation of large tree trunks and stumps
• The initial pilot test of the Air Curtain Technology was a success with no significant smoke emissions and good production located in the southeastern corner of the Site
• Water discharge occurred from the site as a result of the rainfall and fire-fighting water
• Overnight crews continued to manage site security and addressed the potential for flare-ups
• Aeration system was operated to aerate the water prior to discharge through the weir
• Water samples are collected daily from the discharge point of the weir
• Air monitoring was performed before, during, and after the event consistent with the Air Monitoring, Noise Monitoring, and Hazard Communication Plan
• The air quality measurements from yesterday, May 25th, show no exceedances of action levels