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<br /> <br />,~,~ Weather conditions may modify the above schedule but twelve samples will be <br />::~ <br />collected for the water year. <br />Flow measurements will be determined from the on stage readings and <br />corresponding rating curves. Periodic gaging of the stream transects will <br />be conducted to maintain an accurate rating curve. <br />The four (4) water quality samples will be obtained during March, June, <br />August, and September. However, i,i streams are ice covered in March, the <br />March sample will be collected during ~Ipril. <br />Monitoring of Sites 302, 301, and 69 will be conducted during the irrigation <br />season only; flow and field parameters and water quality will be obtained on <br />a monthly basis. Sites 304 and 307 are measured from March/early April <br />through October for water level only. These sites are used to correlate the <br />stream water level with the water level of the adjacent alluvial wells. <br />- _ Site 14 requires an individual sampling regime since it typically flows only <br />during spring runoff. Therefore, once Site 14 begins discharging, monthly <br />i-^ <br />`: 1 flow measurements and field parameters will be collected. Four (4) full <br />" suite samples will be obtained commencing with runoff. <br />~~. Effluent monitoring consists of water quality and flow measurements and is <br />conducted according to the approved methodology. and schedules outlined <br />within Permit CO-0027154. The NPDES permit is located in Exhibit 5 of the <br />Permit Renewal document. Data from the discharge points will be included <br />with the Annual Hydrologic Monitoring Report. Additionally, copies of the <br />Discharge Monitoring Report are forwarded to the Division. <br />The spoil spring monitoring plan involves an annual spoil spring survey and <br />collection of flow, field parameters and water samples. During the month of <br />May, the annual spoil spring survey will be conducted throughout the <br />permitted area of Mines 1, 2, and Eckman Park. Any spring(s) discovered at <br />the time of the survey wi 11 be plotted on the map and wi 11 be measured for <br />flow and field parameters. If the flow from a single spring or the combined <br />~:; flow from immediately adjacent springs exceeds 35 gpm, a full suite sample <br />will be collected and the spring(s) will be incorporated into the usual <br />;_` <br />MR 90-58 Ex. 8-4 Revised 09/07/90 <br />