ARCHIVED REPORTS_1993_1 - Laserfiche WebLink

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III. Environmental Setting P g, Impacts,and N iti ations G. Air Quality Carry out additional watering on the site or stop some landfill operations temporarily on excessively windy days. The program should be extended to all unvegetated soil areas, including unpaved roads. Regarding the use of water,a balance must be made between dust control and the generation of additional leachate. The landfill operator should monitor dust levels and levels of leachate generated to determine when and where water should be applied. (b) The project sponsor should seek to minimize the extent of area exposed to wind erosion. Exposed surfaces,including stockpiles,should be vegetated to the extent possible. Chemical binders should be used to prevent soil erosion by wind action. Inactive faces waiting to be closed should be covered with dust-protectant material, such as a tarp or plastic cover,to reduce wind action on them. Active faces should be covered or watered down thoroughly at the end of each day's work. (c) Plan and phase construction and closure operations such that they do not take place simultaneously on dry windy days. Schedule particularly dusty activities on separate days. (d) Design the site filling plan to facilitate screening of the active face from the prevailing winds, whenever possible,to minimize the amount of wind blown dust released from the working face. (e) Haul trucks carrying easily airborne material should be covered during transport and sprayed with water prior to dumping if it is shown that this would reduce dust emissions during off-loading activities within the landfill. (f) Restrict truck and equipment travel over loose,uncompacted unpaved surfaces. To the extent possible,limit equipment and truck travel along a few routes that can be kept compacted and watered. (g) Vehicle speeds on the project site should be limited to 15 miles per hour. This would reduce the amount of dust generated by vehicle and equipment travel over unpaved surfaces. Watering twice daily would provide a dust emissions reduction of at least 50 percent. All of the measures identified above would likely achieve a dust reduction of 70 percent or more,which is the required abatement for attaining the offset threshold of 801b/day. Additionally,the 270 lb/day estimate would be under a worst-case scenario,and actual dust emissions would likely be below this level. Impacts after mitigation,therefore,would likely be less-than-significant. Impact G.2. Exhaust emissions from equipment and vehicle operations on the landfill would generate additional criteria air pollutant. (ADVERSE) Exhaust emissions from equipment and truck operations within the landfill would generate criteria air pollutants. Exhaust emissions from landfill equipment and truck operations were calculated on the basis of type of equipment,hours of operation and volume of earth and waste III.G.12