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Table G-1. Daily Average Dust (PM10) Concentrations, Visual Observations, and Dust Control Measures EmployedProject No. 110207, Everett, WashingtonDate General Site Earthwork ActivitiesMonitoring Duration (Hour:Min)Daily Average PM10 Conc. (mg/m3)Qualitative Observations regarding Visible Dust Contractor Dust Control Measures EmployedQuantitative Measurements09/08/20Soil excavation in BBH area. CM removal in Area E. Backfilling Areas F & L.7:40 0.171Heavy to moderate smoke from fires present all day - reflected in particulate monitoring data (max reading = 0.245 mg/m3). Slight dust generated during CM removal activities, no dust visible at fence line.Two water trucks operated continuously to control dust on travelways.09/09/20Soil excavation in BBH area. CM removal in Area E, minor removal in A2 and B2 as needed to maintain haul road. Backfilling Areas F & L.7:45 0.103Light to moderate smoke from fires present all day - reflected in particulate monitoring data. Slight dust generated during CM removal activities, no visible dust at fence line.Water truck operated continuously to control dust on travelways.09/10/20Soil excavation in BBH area. CM removal in Area E. Backfilling Areas F & L.7:25 0.109Same as above.Same as above.09/11/20CM removal in Area E, minor removal in A2 and B2 as needed to maintain haul road. Backfilling Areas F & L.Moderate to heavy smoke from fires present throughout the day. ICI water truck watered roads onsite throughout the day. No dust visible at fence line. Same as above.09/14/20Soil excvation in BBH area. CM removal in Area H and minor removal in B2. Backfilling CMS area and Area L.Same as above.Same as above.09/15/20CM removal in Area H and minor removal in B2. Backfilling CMS and REC5 areas and CM Areas B2 and L.Same as above.Same as above.09/16/20Soil excavation in BBH area. CM removal in Area H and minor removal in B2. Backfilling CMS and REC5 areas and Areas B1 and B2.Same as above.Same as above.09/17/20Soil excavation in BBH area. CM removal in Area H and minor removal in Area E. Backfilling CMS area and Areas B1 and B2.Same as above.Same as above.09/18/20Soil excavation in BBH area. CM removal in Area H and started removal in Area K. Backfilling CMS area and Areas B1 and B2.Same as above.Same as above.09/21/20Soil excavation in BBH area. CM removal in Area K. Backfilling Areas B2 and L.7:05 0.010No dust observed at fenceline. Same as above.09/22/20Soil excavation in BBH area. CM removal in Area K and minor removal in Area E. Backfilling Areas B2 and L.3:05 0.008Monitoring stopped once light rain began. No dust observed at fenceline. Water truck operated until rain was well underway.09/23/20Soil excavation in BBH area. CM removal in Area K. Backfilling Areas A1, A2, B2, and L.No dust observed at fenceline. Active dust control not needed due to rain.09/24/20Excavation in Digester Trench area. CM removal in Area K. Backfilling Areas B2 and L.Same as above.Same as above.09/25/20Excavation in Digester Trench area. CM removal in Area K and starting Area N. Backfilling Area L.Same as above.Same as above.09/28/20Excavation in Digester Trench area. CM removal in Areas K and N. Backfilling Area L.6:250.008Same as above.Water truck operated continuously to control dust on travelways.09/29/20Excavation in Digester Trench area. CM removal in Areas K and N. Backfilling Area L.8:000.016Same as above.Same as above.09/30/20Excavation in Digester Trench and BBH areas. CM removal in Areas N and C. 7:050.018City of Everett doing construction on 25th St east of site. Visible dust not apparent at fenceline.Same as above.10/01/20Excavation in BBH area. CM removal in Areas N and C. 8:000.035Fog^ present most of day. City of Everett doing construction on 25th St east of site. Visible dust not apparent at fenceline.Same as above.10/02/20Excavation in Digester Trench and BBH areas. CM removal in Areas N and C. 7:250.038Fog^ present much of day. Visible dust not apparent at fenceline.Same as above.10/05/20Excavation in BBH area. CM removal in Areas N, C. Backfill in completed eastern and central areas.7:200.032Fog^ present much of day. Visible dust not apparent at fenceline.Same as above.10/06/20Excavation in BBH area. CM removal in Area C. Backfill in completed eastern and central areas.6:200.027Fog^ present until early afternoon. Visible dust not apparent at fenceline.Same as above.10/07/20Excavation in BBH area. CM removal in Areas C,D. Backfill in completed eastern and central areas.Visible dust not apparent at fenceline.Water truck operated periodically as needed.10/08/20Excavation in BBH area. CM removal in Areas D. Backfill in completed eastern and central areas.6:000.003 Same as above.Water truck operated continuously to control dust on travelways.10/09/20Excavation in BBH area. CM removal in Areas D,I. Backfill in completed eastern and central areas.6:150.009 Same as above.Same as above.Rain - no monitoringRain - no monitoringRain - no monitoringWildfire Smoke -no monitoring Wildfire Smoke -no monitoring Wildfire Smoke -no monitoring Wildfire Smoke -no monitoring Wildfire Smoke -no monitoring Wildfire Smoke -no monitoring Rain - no monitoringAspect Consulting12/17/2020V:\110207 KC Everett Mill\Deliverables\Interim Action Report 2020\Client Review Draft\App G Dust monitoring\Table G-1 Dust Monitoring Data & ObservationsTable G-1Report for Second Interim ActionPage 3 of 4