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of open soil , etc. All of these measures will be applied <br /> at the proposed project and all control requirements fully <br /> complied with. <br /> Annual and maximum 24-hour dust emission rates have been <br /> estimated for each project activity , based on the average <br /> planned production rate of 250 ,000 tons per year. Emission <br /> estimates were obtained using emission factors developed by <br /> the EPA and other organizations from field measurements at <br /> various mining and product handling facilities . Details <br /> of emission calculations are given in Figure G-1 (see end <br /> of report) . <br /> • <br /> It should be noted that the EPA emission factor for gravel <br /> mining, 0. 1 pound per ton, is intended to apply to a com- <br /> plete operation. However, it is not clear to what extent <br /> this estimate includes related activities such as gravel <br /> storage, trucking from the site, etc. Estimates in this <br /> report include separate contributions for crushing, loading, <br /> handling, haul road traffic, and wind erosion, as well as <br /> the overall contribution of mining. Thus, the total project <br /> dust emissions , as presented in Figure G-2 , are expected to <br /> • be quite conservative. <br /> Figure G-2 indicates that the greatest expected emissions <br /> G-9 <br />