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 DEPARTMEM OF PUfiLfC HFAI.Tfi AND ENVIRONMENT, Water Quality Control Division
Rationale -Page 6, Permit No. CO-6000221
Ta61e V-5 -Self-Monitoring Results for OutfaU 006
Reported Prcvioru No: of
Concentrations Perrriil Limitation
Parameter Avg/Min/Ma; Limitation Excursions•
Flox~, MGD
30day avg 0.137/0.0724/0.339 none -
datl}' max 0.244/0.043/0.747 none -
TSS, mg/f
30-dm~ avg 16/<S/26 35 0
daih~ mar l6/<S/26 70 0
Total Iron, mg/f
30da}~ avg 0.43/0.05/1.0 3.0 0
daily max 0.43/0.05/1.0 6.0 0
Oit & Grease, mg/f none visible IO D
pH, s.u. -/8.00/8.83 6.5-9.0 0
Total Dissolved Solids, mg/P
30-day avg 14581720/2360 none -
daih~ max 1620/800/2480 none -
Whole Effluent Toxicity, Acute '
Ceriodaphnia sp. 4 0(4 LC,,,>100% LC,,,> 100% 0
Table V-6 -Self-Monitaring Results jot Outja11008
Reported Previous No. of
Concentrations j Permit Limitaknn .:.
Parameter Avg/Min/Max Limittition Excursions
Flox•, MGD
30-day avg 0.336/0.045/1.54 none -
daily ntax 0.63/0.045/3.76 none -
TSS, mg/P
30dm• avg 76/5/32 35 0
daily max 16/S/32 70 0
Total Recoverable ]ton, mg/f
30-dm• avg 0.19/0.03/0.38 1.0. 0
daih max 0.19/0.03/0.38 7.0 0
Oil d Grease, mg/i none vlsible 10 0
pH, s. u. -/7.59/8.56 6.5-9.0 0
Tota/ Dissolved Solids, mg/f
30da}~ avg 2725/2400/3010 none -
daih max 2837/2450/3200 Horse -
Whole Effluent Toxicity, Chronic Sta[ Dif-
Cer~ioda hernia sp. 5 Pass, 1 Fail 67.5% 1
[meP phales sp. 6 Pass 0 Fni[ 0
C~