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OXBOW MINING, INC. Permit No. 98GU0812 Initial Approval Page 8 PARTICULATE EM1SSlONS CONTROL PLAN FOR MINING ACTIVITIES THE FOLLOWING PARTICULATE EMISSIONS CONTROL MEASURES SHALL BE USED FOR COMPLIANCE PURPOSES ON THE ACTIVITIES COVERED BY THIS PERMIT, AS REQUIRED BY THE AIR QUALITY CONTROL COMMISSION REGULATION N0.1, Section III.D.1.b. THIS SOURCE IS SUBJECT TO THE FOLLOWING EMISSION GUIDELINES: a. Mining Activities -Visible emissions not to exceed 20%, no off-property transport of visible emissions. b. Haul Roads - No off-property transport of visible emissions shall apply to on-site haul roads, the nuisance guidelines shall apply to off-site haul roads. c. Haul Trucks - No off-property transport of visible emissions except that when operating oft the property of the owner or operator, the applicable guidelines shall be no off-vehicle transport of visible emissions. Control Measures • 1. Adequate soil moisture must be maintained in topsoil to control emissions during removal. Watering shall be implemented if necessary. 2. All stockpiles shall be compacted and watered as needed to control emissions. 3. Topsoil stockpile shall be revegetated within one year. 4. Emissions from material handling (i.e. removal, loading, and hauling) shall be controlled by watering at all times unless natural moisture is sufficient to control emissions. 5. Vehicle speed on unpaved roads and disturbed areas shall not exceed a maximum of 15 m.p.h. Speed limit signs shall be posted. 6. Unpaved haul roads shall be treated with chemical stabilizers per manufacturer's specifications. 7. Unpaved haul roads shall be watered frequently to control fugitive particulate emissions. 8. All disturbed areas shall be watered as needed to control emissions. All inactive areas shall be revegetated as soon as operationally feasible. 9. Reclamation works and sequential extraction of material shall be initiated to keep the total disturbed areas at any one time to a minimum. • 051/7/7-29