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Christy Woodward <br />September 17, 2008 <br />Page 12 <br />monitoring well, if necessary. If the well is pumped dry prior to stabilizing <br />parameters, purging is considered complete. <br />After completion of purging, adequate time for well recharge may be required prior to <br />sampling. Sample containers will be filled from the well pipe discharge if free-flowing or <br />using the peristaltic pump apparatus. After collection of samples, samples will be <br />immediately placed on ice, with exception to tritium samples. Cooling of tritium samples may <br />have an adverse effect on the accuracy of the tritium reading. All sample bottles will be filled <br />completely so that no air space is present. Dedicated tubing will be used for each sample <br />collected; therefore, no equipment decontamination is required. <br />The naming system for groundwater sampling will begin with the year and site abbreviation <br />(i.e. 08DM indicates the sample was collected in 2008, at Denison Mines). The second character <br />set of the sample identification will identify the sample location (i.e. monitoring well name <br />such as MW01). The third character set represents the type of sample (i.e. R for a regular field <br />sample and D for a duplicate sample). The final number represents the date of sampling. The <br />following is an example of a sample number: 08DM-MW01-N-0903 <br />08DM = 2008, Denison Mines <br />MW01 = Monitoring well and well number <br />N = Regular•sample <br />0903 = 9th month, 3,d day <br />After collection of samples, labels should be filled out with the sample identification number <br />detailed above. 411 sample bottles from each well should be placed together in large zip lock <br />or sealed garbage bags to protect the label from moisture damage. Fill out laboratory chain of <br />custody form and submit samples to the laboratory for analyses identified in Table 2. Samples <br />should be shipped to the laboratory immediately upon collection (i.e. daily for overnight <br />delivery) given that some constituent "holding times are only 48 hours. <br />Data Assessment <br />This section discusses the'data assessment techniques that will be used to evaluate site data to <br />achieve the objectives` of the work plan. These objectives include: <br />¦ Evaluate ambient groundwater quality; <br />¦ Evaluate the effect of current underground mining operations on groundwater quality and <br />the persistence of potential affects downgradient from underground mine workings.