2008-07-18_HYDROLOGY - C1981019

• Permit No: C1981019
• IBM Index Class Name: HYDROLOGY
• Doc Date: 7/18/2008
• Doc Name: 2nd Qtr 2008 DMRs
• From: Colowyo Coal
• To: DRMS
• Permit Index Doc Type: DMR’s
• Email Name: JRS
• Media Type: D
• Archive: No

7/2/20081:47 PM2'nd Qtr DMR_08]
2'nd QUARTER 2008
Prospect Pond
NOTES
OUTFALL
ID DISCHARGE
START DISCHARGE
END SAMPLE
DATE FIELD
PH
LAB PH
TSS
SS
FE FLOW
(MGD)
TDS OIL/
GREASE FIELD
eC
007A 04/01/08 8.24 8.4 15 <.2 0.48 0.010 790 none 596
04/07/08 8.82 N/A N/A N/A N/A 0.010 N/A none 1191
04/18/08 8.54 N/A N/A N/A N/A 0.010 N/A none 1792
04/21/08 8.74 N/A N/A N/A N/A 0.013 N/A none 1186
04/28/08 8.21 N/A N/A N/A N/A 0.304 N/A none 1363
05/07/08 8.74 8.3 11 <.2 0.46 0.013 810 none 1115
05/15/08 05/15/08 8.83 N/A N/A N/A N/A 0.013 N/A none 958
06/05/08 06/05/08 8.96 8.7 13 <.2 0.16 0.013 1620 none 1847
06/09/08 06/09/08 8.84 N/A N/A N/A N/A 0.013 N/A none 1232

Minimum 8.21 8.30 <5 <.2 0.16 0.010 790 none 596
Maximum 8.96 8.70 <5 <.2 0.48 0.304 1620 none 1847
Flume size - 30" Monthly Apr
Average May
June
Report minimum for the quarter - pH
Report maximum for the quarter - pH,Fe,TDS,TSS,SS,FIow
Report maximum highest 30 day average - Fe,TSS,Flow
Report maximum number of time sampled in quarter
Sample for Fe,TDS,TSS,SS,Flow at least once/month if discharging continuously
Sample for pH,flow, visual oil & grease if discharging continuously once/week
CF 21.1.2 2008
DMR DISCHARGE DATA
<5 <.2 0.48 0.069
<5 <.2 0.46 0.013
<5 <.2 0.16 0.013
2'nd Qtr DMR 08.xis
Page 7