PERMFILE47177

• Permit No: C1981019A
• IBM Index Class Name: Permit File
• Doc Date: 5/4/2007
• Section_Exhibit Name: Rule 4 Performance Standards -ST
• Media Type: D
• Archive: Yes

RULE 4 PERFORMANCE STANDARDS
• __ "_.w 'Lf•:w.~:-.=. n`L 5..s _i.~"Y S Y. t_:HS. .,>a~:3Nb dwi',9
• 4.05.13 Surface and Groundwater Monitoring
•
r1
L_J
The proposed monitoring program will replace the existing monitoring program in its entirety. This
section will replace page 4.05-10 of the existing permit. Colowyo proposes monitoring the following
sites:
Sedimentation Ponds -Monitoring will be completed in accordance with the requirements of CDPS
Discharge Permit. Please refer to Colowyo's CDPS Dischazge Permit for a list of monitored parameters.
Surface Water -Five surface water sites will be monitored to some degree. These points include four
locations along Good Spring Creek and one location along Taylor Creek.
Monitoring Type Monitoring Monitoring Monthly Quarterly
Location Frequency Parameters Parameters
Surface Water r Creek
Lower Monthly/Quarterly See List Below See Lis[ Below
LTC
Flow Only taken Flow Onlv taken
from Parshall Flume. from Parshall Flume.
Lower West Fork Volume added to Volume added to
Surface Water Good Spring Creek Monthly/Quarterly EFGSC EFGSC
(LWFGSC) measurement to measurement to
apply to actual flow apply [o actual flow
for NUGSC. for NUGSC.
Flow Only taken Flow Only taken
from Parshall Flume. from Parshall Flume.
East Fork Good Volume added to Volume added to
Surface Water Spring Creek Monthly/Quarterly LWFGSC LWFGSC
(EFGSC)' measurement to measurement to
apply to actual flow apply to actual flow
forNUGSC. for NUGSC.
See List Below. See List Below.
Flow estimated by Flow estimated by
New Upper Good combining combining
Surface Water Spring Creek Monthly/Quarterly measurements taken measurements taken
(NUGSC)'
from LWFGSC & from LWFGSC &
EFGSC. EFGSC.
Surface Water Lower Good Spring Monthly/Quarterly See List Below See List Below
Creek LGSC
1. Lower Taylor Creek (LTC) represents the water quality conditions of Taylor Creek directly downstream of
the South Taylor mining area and immediately prior to [he confluence with Wilson Creek and immediately
downstream of the Gossard Loadout.
2. Lower West Fork Good Spring Creek (LWFGSC) represents [his tributary after potential impacts caused by
South Taylor mining.
3. East Fork Good Spring Creek (EFGSC) represents [he upstream, undisturbed background condition of [he
East Fork Good Spring Creek.
4. New Upper Good Spring Creek (NUGSC) represents the water quality of Good Spring Creek downstream of
the confluence of the east and west forks of the creek and downstream of the South Taylor mining area.
5. Lower Good Spring Creek (LGSC) represents the water quality downstream of the South Taylor and existing
mining areas.
~ off ~ Conductivity ~ Temperature ~ Total Suspended Solids ~ Flow ~
South Taylor/Lower Wilson -Rule 4, Page 17
Revision Date: 4/25/07
Revision No.: PR-02