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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 Measurements07/21/20CM removal in F and G areas.8:00 0.01307/22/20Soil over-excavation in PMB6 area. CM removal in Areas F and G.8:00 0.008Minimal dust generated from CM excavation, moderate dust beneath trucks on site. No visible dust observed at fenceline.Water truck operated continuously to control dust on travelways.07/23/20CM removal in Areas F and G.8:00 0.010Same as above.Same as above07/24/20CM removal in Area G.Same as above.Same as above.07/27/20Soil excavation in CMS area. CM removal in Area G.7:55 0.029Same as above. Observed BNSF locomotive idling near dust monitor all day, and large dust cloud originating well south of site.Same as above.07/28/20Soil excavation in CMS area. CM removal in Area G.7:30 0.004Minimal dust generated from CM excavation, minimal to moderate dust when loading CM, and beneath trucks, on site. No visible dust observed at fenceline.Same as above.07/29/20Soil excavation in CMS area. CM removal in Area G.7:20 0.009Same as above.Same as above.07/30/20Soil excavation in CMS area. CM removal in Areas G and L.6:40 0.004Same as above.Same as above.07/31/20CM removal in Area L.7:40 0.013Same as above.Same as above.08/03/20Soil excavation in CMS area. CM removal in Areas G and L.7:40 0.010Same as above.Same as above.08/04/20Soil excavation in CMS area. CM removal in Areas G and L.8:00 0.010Same as above.Same as above.08/05/20Soil excavation in CMS area. CM removal in Areas L and M.8:00 0.008Same as above.Same as above.08/06/20CM removal in Areas L and M.No dust observed at fenceline.None.08/07/20CM removal in Area M.Periodic use of water truck for selected parts of haul route.08/10/20CM removal in Area M. Backfilling PMB6 excavation and CM Area F.5:15 0.004No dust observed at fenceline.Water truck operated continuously to control dust on travelways.08/11/20Soil excavation in CMS area. Test pitting GFB12 location. CM removal in Area M.7:25 0.003No dust observed at fenceline.Same as above.08/12/20Soil excavation in CMS area. CM removal in Area M.7:20 0.015No dust observed at fenceline.Same as above.08/13/20Soil excavation in CMS area. CM removal in Area M.8:00 0.013No dust observed at fenceline. City conducted construction work near the site--on 25th St. west of 529.Same as above.08/14/20Soil excavation in CMS area. CM removal in Area M.6:50 0.018Same as above.Same as above.08/17/20Soil excavation in CMS area incl. bunker pipe area. CM removal in Area M. Backfilling Areas B1 & F.8:00 0.017Same as above.Same as above.08/18/20Soil excavation in CMS area. CM removal in Area M. Backfilling Areas B1 & F.7:35 0.010Same as above.Same as above.08/19/20Soil excavation in CMS area. CM removal in Area M. Backfilling Areas B1 & F.7:35 0.010Same as above.Same as above.08/20/20Soil excavation in CMS area. CM removal in Area M. Backfilling Areas B1 & F.Same as above.Periodic use of water truck for selected parts of haul route.08/21/20Soil excavation in CMS area. CM removal in Area M. Moved water conveyance line and water storage tank. Backfilling Areas F & L.8:00 0.007Same as above.Water truck operated continuously to control dust on travelways.08/24/20CM removal in Areas M, A2, and B2. Backfilling Areas F & G.6:20 0.014No dust observed at fenceline. Same as above.08/25/20Soil excavation in CMS area. CM removal in Areas M, A2, and B2. Backfilling Areas F & G.7:35 0.008No dust observed at fenceline. Same as above.08/26/20Soil excavation in CMS area. CM removal in Areas M, A2, and B2. Backfilling Areas F & G.7:00 0.013City conducted construction work near the site--on 25th St. west of 529. No dust observed at fenceline. Same as above.08/27/20Soil excavation in CMS area (bunker pipe trench) and SE corner of OMS area. CM removal in Areas A2 and B2. Backfilling Areas F & G.6:55 0.006No dust observed at fenceline. Same as above.08/28/20Soil excavation in REC5-MW-1 area. CM removal in Areas A2 and B2. Backfilling Areas F & G.7:30 0.007Same as above.Same as above.08/31/20Soil excavation in CMS area. CM removal in Areas A2, and B2. Backfilling Areas F & G.7:15 0.012Same as above.Same as above.09/01/20Soil excavation in BBH area. CM removal in Areas A2, B2, and E. Backfilling Areas F, G, & L.5:55 0.001Same as above.Same as above.09/02/20Soil excavation in BBH area. CM removal in Areas B2 and E. Backfilling Areas F & L.7:35 0.004Same as above.Same as above.09/03/20CM removal in Areas B2 and E. Backfilling Areas F & L.7:55 0.002Same as above.Same as above.09/04/20CM removal in Areas B2 and E. Backfilling Areas F & L.7:05 0.012Same as above.Same as above.Rain - no monitoringRain - no monitoringMist - no monitoringMeter malfunctionAspect 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 2 of 4