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t <br />Mike Boulay <br />MCM: If a sediment pond exposes groundwater it will backfilled immediately and <br />redesigned so no groundwater is exposed. <br />MCM: Please see description beginning on revised page 2.04 -17. <br />October 16, 2012 <br />137(2), allowing the exposure of groundwater in a pit is obtained from the <br />State Engineer. <br />• The SEO has no records of permits for the existing monitoring wells on <br />site. As stated in the SEO's letter, if these wells were completed without a <br />valid monitoring hole notice or well permit the applicant needs to take <br />immediate action to plug or permit the wells. <br />MCM: Well permits for GW -1, 3, 5, & 9 have been obtained and will be included as part <br />of Appendix E. <br />• Last, the SEO notes that the applicant states that portions of the site may <br />affect current surface water diversions. If at any point the applicant's <br />operations will affect surface diversions they should consult with the local <br />water commissioner to assure no injury to water rights occur. <br />MCM: The DWR notes that portions of McClane Creek are being temporarily diverted. <br />Construction and operation activities will not affect the flow in McClane Creek or <br />any other stream or ditch. <br />11. There is no description of water quality for the alluvial wells. In accordance with <br />Rule 2.04.7(1) please add a description of seasonal water quantity and quality for <br />the alluvial groundwater monitoring wells. <br />12. An additional down gradient monitoring well and a point of compliance well(s) may <br />be required. Well GW -9 was installed as a result of the TR -16 review because the <br />Division required a monitoring point below the disturbance area associated with the <br />refuse pile proposed for TR -16. The new CMWP location proposed with PR -2 will <br />extend further to the southwest beyond the location of GW -9. Well GW -3 is nearly <br />a mile down gradient and would not be adequate for monitoring potential impacts to <br />the shallow alluvial groundwater or East Salt Creek immediately down gradient of <br />the refuse pile. The Division believes that one additional monitoring point just <br />below the disturbance area associated with the refuse pile is warranted. Please <br />provide a plan for one additional monitoring well to be located immediately <br />below the proposed waste pile location. This well will serve to verify the <br />conclusions presented in the PHC for potential impacts to groundwater and <br />East Salt Creek. <br />