DCPCUP-2016-02338 - Laserfiche WebLink

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(11W C. Screening Operations—Screening operations may generate fugitive emissions and are particularly susceptible to wind and low moisture conditions. The initial screen may have adequate material moisture for good emissions control in most circumstances,but as with the reduction phase,each successive screening operation has an increased potential for emissions,with decreased material moisture contents and finer fractions. Water addition during crushing exhibits the best control for screening operations. D. Conveying of Aggregate Products—Conveyance of rock products during the processing of aggregates exhibits the least potential for fugitive emissions of all the processes at a facility. The drop or transfer points between processes and conveyors provide the most opportunity for emissions,but are typically the easiest to control. Wind and/or low moisture conditions may be abated by water application,and minimizing the drop height between transfer points. For normal operations, application of a single management tool may be very effective in controlling emissions. E. Stockpiling and Stockpiling Maintenance—Stockpiling operations at crushing facilities consist of placing aggregates in storage piles with stackers or front-end loaders. Stackers are typically adjustable;so drop height to the pile can be controlled as with other conveyors. Loader transfer results in fewer emissions from dumping,but greater potential from the loader traffic and tire contact with generated fines. Travel roads may be sprayed with water for longer lasting control. Scraping and application of new aggregate can also be effective in controlling fugitive emissions from this operation.Fugitive emissions from stockpiles are highly dependent on aggregate gradation,weather, location,stockpile age,and amount of loading face activity. F. Truck Transport of Final Product—Truck traffic in the area of crushing operations has the potential to generate excessive surface fines on haul roads.Watering and speed controls are the most effective options for controlling fugitive emissions from truck traffic. Any one of these management options may be incorporated into routine operations to provide continuous benefit. G. Total Facility—Minimizing the emissions from fugitive sources at a crushing and processing facility requires a knowledge of potential contributing factors on the part of operations level personnel,and a common-sense application of available management options to provide significant control of fugitive 400 emissions from crushing operations. II. Fugitive Emissions Control Options A. Water Spray Application—Water may be added directly to aggregate product with spray nozzles at any phase of the production cycle. Each facility is equipped with adequate equipment to make multiple-point application of water if needed. The person responsible for plant operations decides where application affords the best control efficiency for current conditions. In addition to material control,the plant foreman is responsible for water application to site roads and stockpiles as necessary to maintain acceptable site opacity. B. Drop Height Management—Facility foreman is responsible for minimizing drop height at all material transfer points,including stacker and loading operations. C. Site Traffic Speed Control—Facility foreman or company responsible official enforces appropriate speed limit in the production area. Speed limit determination is influenced by site-specific conditions and may be lowered at the foreman's discretion,to provide greater control influence. V. Trained Person/Responsibilities A. Maintain Control Equipment in Operable Condition—The facility foreman is responsible for managing emissions control and is required to maintain all suppressive equipment in operational condition according to the Malfunction Prevention and Abatement Plan. He must maintain adequate spare parts inventory to accommodate changing conditions and equipment replacement. B. Evaluate Fugitive Emissions and Need for Control Application—The facility foreman or other person designated as being trained for operations management is required to evaluate conditions, process variables,and fugitive emissions on a continuous basis during crushing operations. From this evaluation,the trained person determines whether opacity and emissions are within allowable levels, and if not,to apply available control options as needed to gain the required level of fugitive control.