2010-05-04_PERMIT FILE - C1994082A

• Permit No: C1994082A
• IBM Index Class Name: Permit File
• Doc Date: 5/4/2010
• Section_Exhibit Name: Tab 15 Hydrologic Monitoring Program
• Media Type: D
• Archive: Yes

TABLE 15 -9
Surface Water Monitoring Frequencies
Yoast Mine
Site Nam Discharge Water Quality
YSSF3 (upper Sage Creek) Semiannual Semiannual - B
YSS2 (lower Sage Creek) Semiannual Semiannual - A
YSGF5 (upper Grassy Creek) Semiannual Semiannual - A
YSG5 (lower Grassy Creek) Semiannual Semiannual - A
NPDES Sites See following ' NPDES Sites' section
Springs
YSSPGI (Annand Draw)
Annual
Annual - A
YSSPG2 (below 011a)
Annual
Annual - B
YSSPG3 (above 012, south)
Annual
Annual - B
YSSPG4 (above 012, north)
Annual
Annual - B
. Water quality samples are analyzed according to the (A) Surface Water Long Parameter List
(Table 15 -5) or the (B) Surface Water Short Parameter List (Table 15 -5a). If flow is less than 5
gallons per minute, then only field parameters will be measured.
Semiannual Samples are collected during the key hydrologic events of spring snowmelt and
summer baseflow.
Annual = May thru July
El
TR -34 28 Revised 04107