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?g 2 -- <br />AIR QUALITY MONITORING PLAN <br />IFi�7 Ci <br />dritfr _ s -- <br />Objectives of the proposed program <br />The program must initially establish as much good data as possible and thus it is important that the <br />initial sampling period covers the full spectrum of seasonal conditions throughout the operating season. <br />The standard procedure accepted internationally is the "Standard Method for Collection and Analysis for <br />Dust Fall" (Settleable Particulates). As a general criterion, generated dust from a source like a mine site <br />rises into the air due to thermal action, wind velocity or by other means. Depending on particulate size <br />and wind velocity, the dust begins to fall out as soon as the immediate thermal or other effects that <br />lifted the dust are dissipated. Once the dust is airborne the factors are simplified to wind velocity and <br />turbulence. Dust particulate of a size greater than 80um is unlikely to be carried any great distance <br />unless a severe windstorm is being experienced, while dust of a 30um diameter will only be transported <br />about 300 m by a wind velocity of 5,0m /sec in 60 seconds. <br />Once the seasonal conditions for a full operating season have been established it will be possible to <br />make predictions and to interpret the continuing monitoring and relate this to climatic conditions, which <br />play an increasing part in the behavior of fall -out dust. <br />At this time Jubilee Venture has contacted Air Tech Environmental Services to establish, operate and <br />maintain a dust monitoring and collection program. This information will be reported to the State of <br />Colorado as required. <br />Jubilee Venture will contract with this assessment facility with local persons that are trained to <br />undertake the sample collection, carry out vacuum filtering of the samples, desiccation and weighing. <br />Gravimetric personnel dust sampling will be carried out on a regular basis with the frequency of <br />monitoring related to the actual risk involved. <br />The principal pollutant is silica or alpha quartz and the means of ingestion is through the respiratory <br />system and thus the monitoring is only of the respirable or particulate Tess than 7um. <br />If the silica content of the respirable portion of the dust is less than 5% of the allowable occupational <br />exposure limit is 5mb /m3 but should the quartz content exceed 5 %, this OEL falls to 0,10mg /m3. <br />Should any other pollutapts be present, these will have to be considered as well in a combined air <br />quality index. <br />Once particulate has been collected on a filter various options are available to the mine and while the <br />ASTM method stipulates only the mass of fall -out dust and limits for this mass indicated as a mass per <br />meter2 per day (m2 /day) the samples can be subjected to: <br />1. Microscopic examination for possible fibers <br />2. Microscopic examination for pollens and organic <br />3. Chemical analysis <br />4. Physical Analysis using XRD< XRF or Infra red spectrometry <br />5. Physical quantitative or qualitative examination using SEM microscopy <br />