Laserfiche WebLink
2.3 Groundwater Monltoring -New 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. All wells are monitored <br />' monthly for water levels. Water quality parameters as listed in Table 2 are analyzed on a semi- <br />annual basis. These levels are adjsuted to mean sea elevation. <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 dawn gradient of the site. The approved plan consists of existing <br />wells that monitor the overburden, Dakota Coal and the underburden aquifers (GW-N36, GW-N37 <br />' and GW-N38) in the northeast corner of the site, and two alluvial wells (GW-N39 and GW-N40) <br />located on Calamity Draw upstream and downstream of the mine permit boundary (Plate 1). These <br />' five were the latest wells completed in May 1993. The upstream well (GW-N39) is located in the <br />flood plain near Lincoln Street in the south-east corner of the mine while the downstream well (GW- <br />N40) is located down gradient of the mine but up gradient of the Nucla waste water lagoons in <br />~ 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-N17P7, and GW-N18P7) during July 1993. Monitoring of these wells <br />resumed at that time. <br />All wells are monitored on a monthly hasis for water levels. These levels are adjusted to mean sea <br />elevation. Water quality parameters are collected and analyzed for the parameters listed in Table <br />' 2 on a quarterly basis. Quarterly samples are conducted in February and November during the non- <br />irrigation season and in May and August during irrigation season. <br />1 <br /> <br />I 6 <br />