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•. <br />~ fit.-- ~ - --~~ ~~ ~~,~~~ ~,,c~~~ ii ~~-ii ~~ii~-~o <br />~~'----_ <br />ii. G. Coal Company <br />INTRODCCTION: <br />This is the first snnual report presented in the ambient <br />air study of the f G. Coal Company Mine. Phis rel,ort <br />contain:; data ubtrined during the period from May ], 1977 <br />to April 30, 1't78, at. the mine site and at tlce loauiny <br />site. 'i'he dat~c pi ~renCCd is to as::i.st. the [I. G. Coal <br />Compzny and thc~ Sittc of C.o'.orado Air Quality llivi~ion in <br />evaluating awi,~.ent :standards in the vicinity of: the II. G. <br />Coa.1 Company Giine ind Loading si.tc~. <br />Taro hi.~h volume: sanpler, and one meteorological station <br />(measuring tain~l di •,-ection and eri-nd velocity) are established <br />at the mine sicc as shown in Figure 1. An additional high <br />volur~[e sampler (Test Site ;)3) eras installed upwind from the <br />loading site on tdr rch ].,, 1978, and i ; Located as =hoc,n in <br />Figure ?.. Ili.-':rol test si-te if2 tray moved on November 13, 1977, <br />to a near location across the county road, appro~:imately 50 yards <br />due North, and 30 '_t. higher than the o]-d location. (see figure <br />1). This cans dodo to alJ.eviate the influence of sampled dust <br />caused direcCly by traf~ic on the nearby dirt read. This near <br />location substanCia.L1y elimi.uated the road dust prc,blem. <br />EQL'IPDIENT: <br />The meteorological station is a Texas Electronics N:odel <br />~l'}6-A. This instrument measures and records caind direction <br />and caind speed con.inuously. This data is reduced manualJ.y, <br />and averaged over ~. hour intervals. This instrument is <br />installed approxi.mttely 30 feet from the ground to reduce <br />the influence of ground level turbulence on the recording <br />of the prevailing ring. <br />The three high vol[me samplers are General Metal [do[-hs <br />model GPI[JL-2.000[[. .hest instruments prll a measured <br />volume of air Lhrough a filter, thus do positing suspended <br />particulate p.catt^r on the filter. Thee samplers arc <br />operated every fou'clays for 24 hour:;. The samplers are <br />mounted on plat:for[, such that the filler. is 10 feet from <br />the ground. This ~.s to insure a repro=entative samt~lc <br />of suspenclecl paarticulate rather than ground level dust. <br />f ' <br />~1 <br />