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pH Sodium <br />Temperature Chloride <br />Lead <br />Bicarbonate <br />Sulfate Manganese <br /> <br />Arsenic Zinc <br />Carbonate Boron <br />Selenium Moh~bdenum <br /> Nitrate <br />Alluvial valley wells AVF-3, AVF-5, and AVF-6 are also monitored for the <br />annual parameters. <br />Water levels in wells 83-01, 83-02, 83-03, and 84-01 are measured quarterly. <br />No. 9 BF-5 well will be installed in the No. 9 Mine refuse area within three <br />months after final grading of the azea. Parameters to be measured and <br />frequency of measurement will be established at that time. <br />Surface Water Monitorine Plan <br />Water quality in the Williams Fork River is monitored. at an upstream site and <br />a downstream site. Parameter lists are shown below. <br />Monthly: <br />Temperature <br />Conductivity <br />• pH <br />Suspended solids <br />Flow rate <br />Qunrterly <br />Temperature Acidity (CaCO~) <br />Conductivity Dissolved solids <br />pH Iron <br />Suspended solids Manganese <br />Flow rate <br />E. NPDES Discharge Monitoring <br />Monitoring locations covered under NPDES permit CO-OG34142 include No. 5 <br />Mine (NPDES No. 003), No. 1 Strip Pit (NPDES No. 022), 7 Nonh Angle Well <br />(NPDES No. 024) and Sewage Treatment Ponds (NPDES No. 023). The first three <br />locations are monitored weekly, bimonthly, monthly, and quarterly fot the following <br />parameters: <br />Weekly Bimonthly <br />Temperature Same as weekly <br />Conductivity plus suspended <br />pH solids, <br />Water leveU visual oil and <br />Mo v uanerl <br />Same as Bimonthly <br />bimonthly parameters <br />plus Iron plus total <br /> dissolved <br />21 <br />