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<br /> <br />In conclusion, due to the topographic characteristics of they ore sorter <br />site, the turbulent diffusion and wind field conditions which transport particulate <br />and Rn-222 are represented by the information given in the above discussion and <br />in Table 2.3-2. Thus, the meteorological conditions in the vicinity of the <br />site, combined with the small source terms, result in relatively low ground <br />level concentration of particulate and Rn-222. This is verified by the limited <br />data obtained from two high volume samples (See Table 2.3.4), and will be further <br />verified following the installation of three passive radon monitors. The radon <br />monitoring schedule to be used by Cotter will comply with the NRC branch <br />position paper on preoperational radiological monitoring for mills. <br />2.3.3 Site Specific Air Quality <br />In June, 1978, Cotter Corporation began a particulate sampling program <br />• using two high volume samplers located in the vicinity of the ore sorter. (See <br />Figure 1.1-2) Two weeks after installation these samplers were dama!Ied and <br />temporarily removed from service due to an electrical power surge. Cotter has had <br />increasing problems receiving reliable data from these. original samplers, and <br />replaced them in May, 1980. <br />The particulate and radionuclide samples collected thus far Lire <br />summarized in Table 2.3-4, Also included in this table are the short: term and <br />long term ambient air standards for particulate matter in the Metropolitan <br />Denver Air Quality Control Region. The particulate samples collected by Cotter <br />do not exceed the Colorado short term or long term standards, nor do they exceed <br />the standard for natural uranium exposure given in 10 CFR 20, Appendix B. <br /> <br />2-21 <br />