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Surface Water Monitoring -New Horizon 2 Mine The total number of surface water sampling <br />locations is five. Calamity Draw contains three stations while the remaining two stations are located <br />• on the West Lateral Ditch. <br />Stations SW-N102 is located on a tributary of Calamity draw and will remain as a monitoring point for <br />water leaving Pond 007. This will also act as the NPDES 007 discharge monitoring point for Pond <br />007. The two stations, SW-N108 and SW-N109 are also located on Calamity Draw. The upstream <br />station, S W-N108 is located just west of Lincoln Street as it flows from under the road. This station <br />will define water quality and quantity before it enters the area potentially influenced by the mine. SW- <br />N109 is located on Calamity Draw west of the mine permit boundary but east of the Nucla waste <br />water lagoons. This station will define the water quality and quantity as it leaves the site but before <br />it is influenced by the waste water lagoons. Station SW-N101 was dropped from the monitoring <br />program in the Calamity draw as Stations SW-108 and SW-109 replaced its functions. <br />Surface stations SW-N104 and SW-N105 monitor the West Lateral Ditch. These two stations monitor <br />flow and water quality of the ditch system as it enters the upstream area of the mine and as it leaves <br />the mine area. <br />Monthly flow, pH, temperature, and conductivity measurements will be taken at the five 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 2.04.7-2 will be collected on a quarterly <br />basis for SW-102, and on asemi-annual basis for the remaining four stations (SW-N104, SW-N105, <br />SW-N108 and SW-N109). The discharge point at Pond 007 will also be monitored for NPDES <br />requirements. <br /> <br />(REVISED 9/99) 2.04.7-42 <br />