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~~~9c~~t679~flt 0~ <br />• ~4'i3~ti1 <br />4210 East 11th Avenue <br />Denver, Colerddo 80220 <br />Pl,one(303) 320-8333 <br />Cotter Corporation <br />Dave Marcott, Vice-President <br />9305 West Alameda Parkway <br />Lakewood, Colorado 80226 <br />Attn: Tim Smith <br />Dear Gentlemen: <br />FE915 <br />February 11, 1980 <br /> <br />Frank ./~. Traylor, Jr, ~/1.D <br />Execut~~e Director <br />This letter addresses questions concerning our letter dated Deaamber 18, 1979, <br />raised in your subsequent reply dated December 28, 1979. <br />You inquired about the Department`s concern regarding the leaching of 226Ra <br />• from ore or waste rock. Ecological parameters, specific to those affecting <br />the availability of 226Ra in the waste rock and ore at the Schw,srtzwalder <br />mine and environment are discussed in the following publications: <br />Rusanova, G.V., "Behavior of Radium and Calcium in the Soil Plasit System," <br />Soviet Soil Science, 3, 275-280 (1964). <br />Verkhovskaja, I.V., P.b. Vavilov, and V.I. Maslow, "The Migration of Natural <br />.Radioactive Elements Under Natural Conditions and their Di:>tribution <br />According to Biotic and Abiotic Environmental Compenents," pp. 313-28 in <br />Radioecologi.cal Concentration Processes, B. Aberg and F.P. Hungate (eds.), <br />Pergamon Press (1966). <br />Taskayev, A.I., V.Y. Ovchenkov, R.M. Alekaskhim and I.L. Shuktomova, "Uptake <br />of 226Ra by Plants and Change in Its State in the Soil - P;_ant Toos - <br />Litterfall System", "Pochvovedenlye" 2, 42-48 (1977). <br />Grzybowska, D., "Uptake of 226Ra by Plants from Contaminated So::ls," <br />Nucleonika 19 (1), 7I-78 (1974). <br />McDowell-Boyer, L.M., A.P. Watson and C.C. Travis, "Review and Ile commendations <br />of Dose Conversion Fac[ors and Environmental Transport Par:smeters For <br />210pb and 226Ra". Oak Ridge National Laboratory ORNL/NUR]iG-56. <br />u <br />