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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 <br />for water leaving Pond 007. This will also act as the NPDES 007 discharge monitoring point for <br />Pond 007. The two stations, SW-N108 and SW-N109 are a{so located on Calamity Draw. The <br />upstream station, SW-N 108 is located just west of Lincoln Street as it flows from under the road. <br />This station will define water quality and quantity before it enters the area potentially influenced by <br />the mine. SW-N109 is located on Calamity Drawwest of the mine permit boundary but east of the <br />Nucla waste water lagoons. This station will define the water quality and quantity as it leaves the <br />site but before it is influenced by the waste water lagoons. Station SW-N101 was dropped from <br />the monitoring program in the Calamity draw as Stations SW-108 and SW-109 replaced its <br />functions. <br />Surface stations SW-N104 and SW-N105 monitor the West Lateral Ditch. These iwo stations <br />monitor flow and water quality of the ditch system as it enters the upstream area of the mine and <br />as it leaves 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 <br />quarterly basis for SW-102, and on asemi-annual basis for the remaining four stations (SW-N104, <br />SW-N105, SW-N108 and SW-N109). The discharge point at Pond 007 will also be monitored for <br />NPDES requirements. <br />(REVISED 25 Jul 2002) 2.04.7-42 <br />