Laserfiche WebLink
Monthly flow, pH, temperature, and conductivity measurements will be taken at the six monitoring <br />locations to assess potential impacts of the mine and to fulfill the requirements for the water <br />' augmentation plan. Water quality parameters listed in Table 2 will be collected on a quarterly basis. <br />This table represents the water quality parameters that were collected during subsequent sampling <br />periods. By continuing with this parameter list, the baseline can be utilized to better define the <br />' conditions as the mining proceeds. The discharge point at Pond 007 will also be monitored for <br />NPDES requirements. <br />2.3 Groundwater Monltoring -Hew Horizon 1 Mlne <br />' The total number of groundwater monitoring locations at New Horizon 1 is fourteen (14). The <br />monitoring schedule and parameters being monitored are shown in Table 1. <br />' 2.4 Groundwater Monltoring -New Horizon 2 Mlne <br />' Western Fuels proposed and was authorized to modify the groundwater monitoring program to <br />include locations directly up and down gradient of the site. The approved plan consists of existing <br />' wells and installation of a new set of wells to monitor the overburden, Dakota Coal and the <br />underburden aquifers (GW-N36, GW-N37 and GW-N38) in the northeast corner of the site, and <br />iwo alluvial wells (G-N39 and GW-N40) located on Calamity Draw upstream and downstream of <br />the mine permit boundary (Plate 1 }. The five new wells were completed in May 1993. The upsVeam <br />well was located in the flood plain near Lincoln Street in the south-east corner of the mine while the <br />downstream well was located down gradient of the mine but up gradient of the Nucla waste water <br />lagoons in Calamity Draw. <br />Western Fuels acquired access to the cluster of wells located in the southwest corner of the project <br />area (wells GW-N16P1, GW-N17P1, and GW-N18P1) during July 1993. Monitoring of these wells <br />resumed at that time. <br />Two other wells, GW-N6 and GW-N22, were investigated for inclusion in the monitoring program. <br />' Well GW-N6, located northwest of the permit boundary, was found to be unusable due to the casing <br />being filled with rocks. Well GW-N22, located downgradient of the waste water lagoons on Calamity <br />' Draw, cannot be used due to access agreements and may not be appropriate to monitor due to its <br />downstream location from these treatment facilities. <br />' All wells will be monitored on a monthly basis for water levels. These levels will be adjusted to <br />mean sea elevation. Water quality parameters will be collected and analyzed for the parameters <br />listed in Table 2 on a quarterly basis. Quarterly samplings will be conducted in February and <br />5 <br /> <br />