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INTRODUCTION <br /> I <br /> This report details the information collected in support of the Manti-LaSal <br /> National Forest's preliminary assessment on nine inactive uranium mine groups . <br /> The information is organized according to the four major categories of work <br /> that were outlined in the scope of work (GJ-89-ER08) , dated July 11 , 1989. <br /> The scope of work was prepared under the umbrella of the May 3. 1989. <br /> iInteragency agreement (DE-AI13-89GJ30004) between the U.S. Department of <br /> Energy (DOE) , Idaho Operations Office through its Grand Junction Projects <br /> Office (GJPO) . and the Department of Agriculture, Manti-LaSal National Forest. <br /> The work was performed by UNC Geotech, operating contractor at the DOE/GJPO. <br /> The objective of the work was to assist the Manti-LaSal National Forest in <br /> completing preliminary assessments on nine inactive uranium mine sites <br /> suspected of violating Comprehensive Environmental Response, Compensation, and <br /> `- Liability Act (CERCLA) standards. The work consisted of the quantification of <br /> contaminated water discharges (flow rates and concentrations of radionuclides <br /> and heavy metals) ; estimation of radioactive contamination in waste dumps ; <br /> estimation of release of contamination into the air; and estimation of on-site <br /> -li exposure to radiation, including radon, for a 18-day, 24-hour-per-day maximum <br /> visit. <br /> Four of the nine inactive uranium mine sites are in the Moab Ranger District <br /> rand five sites are in the Monticello Ranger District. The mines in the Moab <br /> � - District are the Firefly-Pigmy, Black Hat, Yellow Circle Group, and Grey Daun <br /> Group. The mines in the Monticello District are the Rex Group, Horseshoe <br /> No. 1. Brushy Basin No. 31 , King Edward Group, and Laura. The mines were <br /> r l selected by the Forest Service for field sampling on the basis of preliminary <br /> L_ work done in 1988. Site visits to each mine were -ade during August 21-25. <br /> sl 1989. <br /> The maps showing the locations of measurements made at each mine site are <br /> contained in Appendix A. These maps were prepared by Bto/West, Inc. , during <br /> field work performed in 1988 and were provided by the Forest Service to UNC <br /> Geotech for this work. Gamma exposure-rate measurement locations and values <br /> are noted directly on the mine site maps. Locations for radon, radon-flux, <br /> and equivalent radium measurements are also noted on the maps; measurement <br /> r _ values are given in the tables accompanying the maps. <br /> L J Ore production and waste estimates from a literature search conducted under a <br /> C subcontract by William L. Chenoweth, Grand Junction, Colorado, are given in <br /> Appendix B. <br /> J 1 . CONTAMINATED WATER DISCHARGES <br /> L— <br /> FIELD WORK <br /> ' I Wat`r zr ixvlc4 .-:r !a c❑ ai iZ ident:f:eu <br /> A0pP11dir. .4 SavPn of theRe samplep were takan from eine dischar c "a*crs - the <br /> pond inlet near the Firefly Mine portal , the spring at the toe of the Firefly <br /> spoils dump, a seep downgradient from the Little Dan Mine in the Grey Daun <br /> -j Group, the drain pipe from the St. Patrick Mine portal In the Black Hat Group, <br /> J the drain pipe from the Mt. Linnaeus s8 Mine portal In the King Edward Group, <br /> I _ <br /> 1 ' � I <br />