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C~ <br />• <br />Page 4 a) Raw Material - again moisture content depends <br />on e>;tent of precipitation. During dr}- <br />periods or dry years the material may <br />actually be quite "dry". These are relative <br />terms. Moist compared to what.' <br />Page 6 Spray bars will not operate in freezing <br />weather. The mine was in operation as <br />recently- as December 9, 1989. <br />Page r a) Conveyors - Control fur conveyor material is <br />not specified. Is one necessar}•^ <br />b) `lateri;~i is tr;nsferrc-d t,c loader sn~l trucl. <br />from conveyer to lame stockpiles northrtest <br />of processor. S:hether Lhis material is <br />finished product or "tailings" is <br />undetermined, but the notion of zero transfer <br />points may not be accurate. _ <br />cl Dust is visible from Hw•: 9 as a result of <br />dumpins of stockpiled m>,terit:l (gravel). <br />Page 8 a) Shorts 800 tons/hr ftni slr product"pet... <br />b) f=inished product stockpile stored at any one <br />time shorn as zero tons. 1'et according to <br />the preceding section 300 tons/hr .. 24 <br />hrs/day x appro. 210 days/yr = 3,f08,000 <br />ton/y-r are being produced. To C}re I:nowledge <br />of this board aot Gr:~ !rucl: load of gravel <br />has left the operation in the past year. <br />Where is it ~oi.ng°. <br />Page 9 a) SJhy is the silt content of the haul roads <br />unknown? This is a larger operation and the <br />quantity of silt in the road material will <br />have a major bearing on amount of dust <br />generated. Particle size analysis is not an <br />expensive or difficult test. <br />b) Proposed controls: Hauling "moist" material <br />does not effect the amount of dust kicked up <br />try moving ve}ricles whic}r is significernt at <br />this operation. <br />Page 10 b) Finished product transport (on-site) shows no <br />trucks used. Compare to page eight. What <br />are they- hauling^. 300 tons per hour. <br />Page 11 a) "Site Disturbance subject to wind erosion <br />listed as 10 Acresl. An estimated 35-50 <br />acres of unreclaimed land currently e:tiists. <br />