PERMFILE107381

• Permit No: C1994082A
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Doc Name: NPDES PERMIT YOAST MINE
• Section_Exhibit Name: TAB 15 APPENDIX 15-1
• Media Type: D
• Archive: Yes

COLORADO DEPARTMENT OF PUBLIC HEALTH AND ENVIRONMENT, Water Quality Comrol Division
Rationale -Page S, Permit No. CO-0000221

Table V-3 -Self-Monitoring Resu/1s jot OutfaU 004
Reported Previous No. of
Concentrations Permit Lirrdtation
Parameter Avg/Min/Max Limitation Excursions
Flow, MGD
30~~, avg 0.322/0.048/1.0714 none -
daily mar 0.537/0.048/3.0276 none -
TSS, mg/P
30-day avg 18/8/24 35 0
daily max 18/8/24 70 0
Total Recoverable Iron, mg/f
30day avg 0.14/0.05/0.27 1.0 0
daily max 0.14/0.05/0.27 7.0 0
Oi! & Grease, mg/f none visible 10 0
pH, s.u. -/7.26/8.31 6.5-9.0 0
Total Dissolved Solids, mg/P
30dm~ avg 3822/3430/4383 none -
daily innx 4099/3730/4490 none -
Whole Effluent Taziciry, Chronic
Cerio~ sp. S Pass, 1 Fail Slat Dif-71 % 1
tmep es sp. S Pass, 1 Fail Star Drf-71 % J

• Table V-0 -- Self-Monitoring Resuks for Outfall 005
RepoKed Previous No. of-
Concentrations Permit Limitattion
Parameter Avg/Min/Max Limitation Ercursions
Flow, MGD
30-day avg 0.050/0.0009/0.0777 none -
daily max 0.118/0.0035/0.1210 none -
TSS, mg/f
30-dai'avg I1/<5/32 35 0
daih max 11/<5/32 70 0
Tonal Jron, m~ rf
30-dm' a+•g 0.26/0.03/0.41 3.0 0
daih mar 0.26/0.03/0.41 6.0 0
Oil & Grease, mg/f none visible 10 0
pH, s.u. -/7.96/8.90 6.5-9.0 0
Total Dissolved Solids, mg/f
30-day avg /217/1005/1400 none -
daifl max /297/!040/1450 none -
Whole Effluent Toxiciry~, Acute
Ceriodaphnia sp. 1 of 3 LC,,,<]00% LC,,,> 100% 1