Laserfiche WebLink
4.8.5.2 Ground-Water Monitoring <br />Map M52 shows the locations of the ground-water monitoring sites. The current list of ground-water <br />parameters to be monitored is given in Table 4.8-13. The current ground-water monitoring schedule is <br />summarized in Table 4.8-13a. Table 4.8-13a was changed in PR-3 (permit term 1993-1997) in order to <br />accommodate a more clearly understandable and user friendly monitoring schedule format. In Technical <br />Revision TR-93, the Division and Trapper Mining Inc. agreed that well GP-9 is the point of compliance for <br />the Basic Standard for Ground Water for the Third White sandstone. In Technical Revision TR-96, the <br />Division and Trapper Mining Inc. agreed that the Coy well is the point of compliance for the Basic <br />Standards for Ground Water for the Flume Gulch alluvium. <br />Three lists of ground-water parameters are sampled as outlined in Table 4.8-13, according to the <br />schedule presented in Table 4.8-13a. The hydrologic data derived from this monitoring program is <br />submitted to the Division on an annual basis by March 15 of each year. The first Annual Hydrologic Report <br />was submitted to the Division in January, 1983. <br />LIST B in Table 4.8-13 gives the parameters to be sampled on an annual basis during third quarter of <br />each year. LIST C and LIST D are sampled during the second quarter of each year. LIST C is used to <br />sample operational wells which monitor the effects of mining in areas not associated with utility wastes <br />disposal. LIST D is used for wells to monitor the effects of utility wastes disposal. With regard to LIST D, <br />actual installation of wells in the backfilled pits will be dependent upon whether or not utility wastes are dis- <br />posed upgradient from the proposed monitoring sites. Proposed wells in the undisturbed aquifers <br />downgradient of utility wastes disposal sites will be installed as waste disposal progresses and as needed. <br />List E was used for monitoring the LUX-1 well. List E was removed from Table 4.8-13 in PR-6 because <br />the LUX-1 well was sealed and abandoned in 2006 as a result of the approval of final bond release <br />application SL-7. <br />Historical information on well completion information and lithologic logs for monitoring wells are included in <br />various sections of the permit application. Appendix H, Radian Report Tech. Note 280-311-02-03 lists <br />information for monitoring well series GF, GBB, and GZ. Section 2.7.7.3 (p 2-539) of the permit <br />application provides information on lithologic logs for monitoring wells F-1, F-2, P-1, P-3, P-5, and P-8. A <br />well construction diagram is provided in Appendix V. Appendix V also provides lithologic logs and <br />monitoring well completion info for wells GA-1, GA-2, GB-1, GB-2, GB-5, GC-1, GC-3, GE-1, GE-2, GE-3, <br />GD-1, GD-1(2), GLEV-1, GLEV-2, GLEV-3, CY-A, CY-1, CY-2, CY-3, GX-1 and Empire Well 81-03A. <br />Mercury, silver and zinc are not included in LIST B because their concentrations in historic samples were <br />very low and because it is unlikely they would occur in significant concentrations in any potential leachate <br />from utility wastes (refer to Section 4.3.4.6). Iron was removed from List C as the definition of variations in <br />iron concentrations is not very useful since the range in this parameter has been defined. TDS was added <br />to List C until a good correlation between TDS and conductivity can be established. Carbonate was added <br />to list B and is used for situations when the pH is greater than 8.3. <br />4-242