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. ~ .> '~ C Yl a h - L~ £/~J rh . l 'II'I"IIIIIII'I'~' <br />WYOMING DEPARTMENT OF ENVIRONMENTAL QUALITY <br />LAND QUALITY DIVISION <br />GUIDELINE N0. 3 <br />RADIOLOGICAL SURVEY <br />This, document is .a guideline only. Its contents are not to tie inter- <br />. preted by the.aQplicant or DEQ staff as mandatory. Its preparation is the <br />result of numerous requests from applicants who have expressed a c.eed for <br />a check-list to.~ssist them in preparation of a comprehensive application <br />,containing all required information. <br />I. OBJECTIVES i <br />The olijectives~of the baseline radiological survey and sampling are to: <br />,~ , <br />1. Establish tlie.,nature of the pre-mining radiological environment. <br />2. Detect and document areas having anomalous radiation. <br />3. Establish pre-mining concentratiocis:of radiopuclides in the surface <br />materials of tt~e.lands to be affected in order to establish a goal <br />for recYamation:, - _. <br />II. GAMMA SURVEY-METHODS ', <br />The.gamma~survey shoul¢'be used to determine the pre-mining r,;diologi- <br />cal environment. _:~e following methods are recommended. <br />1. The suivep.=should be~conducted using-a grid system where. ;readings <br />are recoided:~sat,no.greater Chan 500 foot intervals. Pacing of <br />these=3ist.$ncgs is.sufficient. - _ - <br />2. The survey"stiquld •also consist of a;"scan method" where rf;adings <br />are'noted`~.Between•.the 500_foot intePia3s:- In this way radiological <br />anomalies~irltl.be detected. If such anomalies are found, they <br />should be~preci9ely de€i~fed as'to:ldcation and extent. <br />3. Readings should be taken with a'scintil2ometer or similar device <br />held apprgximaCely three feet above the ground. <br />4. Results of the survey should be plotted and•isopleths.constructed <br />on a pre-mining topographic map of the survey area..- See II,apping <br />requirements in Guidelirt'e 6. The survey grid should be aligned <br />with key control points to assure similar. results if. the survey- is <br />repeated. <br />E. Hinzel/March 1980/Revision 1 <br />