HYDRO23579

• Permit No: C1981071
• IBM Index Class Name: Hydrology
• Doc Date: 2/14/2001
• Doc Name: MEMO CYCC
• From: JON KUBIC
• To: JANET BINNS
• Permit Index Doc Type: NPDES
• Media Type: D
• Archive: No

COLORADO DEPARTMENT OF PUBLIC HEALTH AND ENV/RONMENT, Water Quality Contra[ Division
Rationale -Page 4, Permit No. CO-0027154
Table /V-4 -- Self-Monitoring ResuUs for Outfal[ 005 (Fifteen Reporting Periods Only)
Parameter Reported Previous No. of
Concentrations Permit Limitation
Av);/Min/Mar Limitation Excursions
Flow, MGD 0./9/0.01/0.48 report NA
Total Suspended Solids, tag/!'
30-day avg 7.7/3.0/25 35 0
daily max 11.3/5/42 70 0
Settleable Solids, mf/(' 0.1/0.]/0.! 0.5 0
Oi[ & Grease, mg/P NV/NV/NV 10 0
pH, s. u. -/7.49/8.91 6.5-9.0 0
Conductivity, umho/cm 3346/2203/4410 5340 0
Whole Effluent Toxxicityy, Acute
Ceriodaohnia sp. -/> 100/> 100 > 100 0
Fathead Minnow -/75/> 100 > 100 1
Copper (PD), mg/P
30-day avg 0.0004/0/0.003 0.073 0
dai[v m¢x 0.00/2/0/0.009 0. /3 0
/ran (TR), rag/P 0.15/0/0.66 1.0 0
Manganese (TR), mg/P 0.21/0.01/0.71 report NA
Silver (PD), mg/7
30-day avg 0.0001/0/0.00! report NA
daily max 0.0002/0/0.00/ report NA

Table /V-5 -Self-Monitoring Results for Outfall 006 (Eleven Reporting Periods Only)
Parameter Reported Previous No. of
Concentrations Permit Limttaton
Avg/Min/Maz Limitation Excursions
Flow, MGD 0.0405/0.0008/0.2!07 report NA
Total Suspended Solids, mg/7
30-day avg 12.6/0/36 35
doily ntax 13.1/0.1/36 70 0
Senlenble Solids, nt7/f 0.1/0/0.2 0.5 0
Oil & Grease, mg/P NV/NV/NV ]0 0
pH, s. u. -/7.18/8.53 6.5-9.0 0
Conductivity, unrlto/cm 2294/1600/3258 report NA
Iron (Total), mg/P
30-day avg 0.24/0.1/1.2 3.5 0
daily max 0.24/0.1/1.2 70 0
Table /V-6 -- Self-Monitoring Results for Outfall 007 (Eight Reporting Periods Only)
Parameter Reported Previous No. of
Concentra[ions Permit Limitation
Avg/Min/Max Limitation Excursions
Flow, MGD 0.1635/0.037//0.566 report NA
Total Suspended Solids, mg/~
30-day avg 12/0/33 35 0
daily max 24/5/66 70 0
Settleable Solids, mf/!' 0.!6/0.//0.6 0.5
Oi! & Grease, mg/P NV/NV/NV 10 0
pH, s. u. -/7.46/8.60 6.5-9.0 0
Conductivity, umho/car 3757/1500/6065 5150 0
Whole Effluent Toxicity. Acute
Ceriodaplrniasp. -/75/>]00 >!00 1
Fathead Minnow -/> 100/> !00 > 100 0
Copper (PD), mg/P