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<br />' ..., Sundry and sndry MIMI DAfO FxwpuoNS~s.vry <br />' application of this approach results in the conclusion that there is no potential for significant <br />' impact to human or ecological receptors at the Sunday mine properties. <br />3.1.1 Review of Available Site Information <br />Available site information was reviewed to: <br />1. determine basic site characteristics; and <br />2. identify potential exposure pathways and exposure points. <br />3.1.1.1 Background <br />' As discussed in Section 2.5, the radiometric survey demonstrated that naturally-occurring <br />background radioactivity levels two or three times greater than those measured at the Mine <br />properties aze ubiquitous to the azea in which these Mines exist. RAGS I defines the two types <br />of background levels of chericals as: <br />' 1. Natwally-occurrin¢ I<;vels which are ambient concentrations of chemicals present in the <br />environment that have not been influenced by humans (i.e., metals); and <br />2. Anthronoaenic levels, which are concentrations of chemicals that are present in the <br />' environment due to human-made, non-site sources (i.e., industry). <br />' Background ranges from localized to ubiquitous. Polycyclic azomatic hydrocarbons (PAH's) and <br />lead are examples of anthropogenic, ubiquitous chemicals, although these chemicals also may be <br />' present at naturally occurring levels in the environment due to natural sources such as forest fires. <br />1 <br />' H'\usFASV.ffM\WTMRR\IETfFA5.95\wSUNSUN.RP'r <br />1 <br />Page 12 <br />1 <br />