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Christy Woodward <br />July 31, 2008 <br />Page 3 <br />future to address changes made to CRS §34-32 by HB 1161, all mines evaluated in this data <br />collection work plan will be evaluated for the potential to produce acid mine drainage and the <br />potential for the mine to produce toxic substances. None of the mines included in this study <br />use or store designated chemicals. <br />Purpose and Objectives <br />The overall data collection objective described in this work plan is to evaluate if the potential <br />for formation of toxic materials or acid mine drainage at the Sunday Group or Van 4 mines is <br />sufficient to adversely affect any person, property, or the environment. <br />Data Collection Procedures <br />This section discusses the number of samples proposed to be collected, locations, sampling <br />and analysis methods, and the basis for using a particular analysis method. This section is <br />organized as follows: <br />¦ Sampling Locations and Analyses: Provides rationale for sampling locations and <br />laboratory analytical methods to be used to characterize development rock, ore, and soil; <br />¦ Field Activities, Methods, and Procedures: Discusses the sampling equipment needed <br />and sampling procedures for development rock, ore, and soil sampling. <br />Table 1 is a summary of data collection activities and Table 2 identifies the laboratory <br />analytical methods, sample containers, preservation requirements, holding times, and <br />reporting limits. As discussed with Denison, Energy Laboratories, Inc. (Energy) will be the <br />primary analytical laboratory used for this project. This data collection work plan was <br />developed in coordination with Energy regarding available and appropriate analytical <br />methods and other laboratory-specific information. <br />Sampling Locations and Analyses <br />Sampling locations and analyses for development rock areas, ore, and soil are planned to <br />evaluate the Sunday Group and Van 4 mines for potential formation of toxic materials or acid <br />mine drainage, and to understand the potential effects of these mines on the environment. <br />The potential for formation of toxic materials or acid mine drainage will be evaluated based <br />on samples submitted for acid base accounting (ABA) analyses, meteoric water mobility <br />procedure (MWMP) column tests, and total metals. The collection of representative samples <br />of development rock is an important aspect of the characterization program. Figure 2 <br />(embedded within text) is a diagrammatic representation of the development rock areas, <br />which shows the layering present in the facilities. The facilities were constructed by placing <br />development rock at angle of repose slopes extending away from the mine adit. As the size of <br />the underground facilities increased, subsequent layers of development rock were placed, <br />which cover the working face of the previously placed layers. To collect a representative <br />sample of the layered development rock area, a series of trenches will be constructed on the <br />OA64986 - Denison\Task Order 3 - DMO Sampling and Analysis Plan\Task 3.1 - Soil Ore Rock Data Collection Plan\Pinal Denison Sunday Mines Group Soil Ore Rock Data <br />Collection Work Plan.doc