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COLORADO DEPARTMENT OF HEALTH, Water Quality Control Division Rationale - Page 4. Permit No. CO-0000221. IV. FACILITY DESCRIPTION • Table IV-1 -- Discharge Points Design Receiving D.Pt. Wastewater Source Cap.,MG Waters 002 Stormwater runoff, 87.12 Grassy Creek, which flows mine water, spoil 4 1/2 miles to Yampa River springs 003 Stormwater runoff, 1.67 Grassy Creek, which flows shop area runoff, 4 miles to Yampa River truck wash pond overflow 004 Stormwater runoff, 3.25 .~ Unnamed tributary, which flows spoil springs 4 1/2 miles to Fish Creek 005 Stormwater runoff, ~ 1.90 Unnamed tributary, which flows mine water (proposed) 1 mile to Dry Creek 006 Stormwater runoff, 4.53 Unnamed tributary, which flows mine water, production 1 1/2 miles to Dry Creek well groundwater 008 Stormwater runoff, 2.66 Unnamed tributary, which flows mine water, spoil 4 miles to Fish Creek springs 009 Stormwater runoff 2.59 Unnamed tributary, which flows 1/2 mile to sage Creek 010 Stormwater runoff (proposed) ~ Unnamed tributary, which flow! lj2 mile to Sage Creek Pursuant to the authority of Article 9, Title 26, Regulations for the Certification of Water Treatment Plant and Wastewater Treatment Plant Operators, this facility may require a certified operator. V. PERFORMANCE HISTORY A. Monitoring Data 1. Discharoe Monitorino Reports: Table V-1 summarizes the effluent data reported on the quarterly Discharge Monitoring Reports (DMR'e) from October, 1989 to September, 1991. Table V-1 -- Self-Monitoring Results Parameter No. of Samples Reported Concentrations Avg/ Min/ Max. Previous Permit Limit No. of Violations Discharoe Point 002 pH, s.u. 3 NA/7.9/8.6 6.5-9.0 0 Tss, mg/1 (30 day avg.) 3 9/4/18 35 0 ' TSS, mg/1 (daily max.) 3 18/4/42 70 0 T. Settleable Solids, ml/1 1 NA/0.4/0.4 0.5 0 T. Iron, mg/1 (30 day avg.) 3 0.08/0.06/0.11 3.5 0 T. Iron, mg/1 (daily max.) 3 0.11/0.09/0.12 7.0 0 Oil and Grease, mg/1 3 None visible 10.0 0