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COLORADO DEPARTMENT OF PUBLIC HEALTH AND ENVIRONMENT, Water Quality Control Division
<br />Rationale. Page 3. COG-0500000 Sand and Gravel General Permit
<br />Table 111-2- Pesos pare roc" quo ur
<br />
<br />Effluent Parameter s
<br />n
<br />Discharge Limitations
<br />
<br />Rationale
<br /> 30 D Av 7 Da A Dail Max
<br />d
<br />m
<br />Flow
<br />Report
<br />NA
<br />Report
<br />Discharge Evaluation
<br />,
<br />Total Suspended Solids, m g11 30 NA 60 Federal Effluent Guidelines
<br />S.U.
<br />H NA NA 6.5-9.0 Water ali Standards
<br />,
<br />Oil and Grease, m R NA NA 10 State Effluent Regulations
<br />Sites eci c
<br />Selenium
<br />-17
<br />Various
<br />NA
<br />Various
<br />Water ali Standards
<br />,
<br />Metals, u g/7 Various NA Various Water ali Standards
<br />anics, u /I Various NA Various Water ali Standards
<br />Whole E uent Toxici
<br />Chronic
<br />Stat. Di & IC25>IWC
<br />State Permit Limitations
<br />Acute LC50>100% State Permit Limitations
<br />Total Dissolved Solids, m /1 Report NA Re rt Salinity Regulations
<br />Total Phosphorus, m /1• R on NA 0.2-1.0 Control Regulations
<br />Footnotes', ", •"> and ---- can oe Iounu unucr ,au,c uav
<br />Table HI-3- Industrial -Yana suo arr y exce , in"" Tr uss ????.. ___ •..•..•...•• -- - - -, --
<br />Rationale
<br />Effluent Parameter Disc harge Limitations
<br /> 30 D A 7D A Dail Max
<br />m d
<br />Flow Re ort NA R ort Discharge Evaluation
<br />,
<br />Total suspended solids, m 25 NA 45 Federal Effluent Guidelines
<br />H S.U. NA NA 6.5-9.0 Water alf Standards
<br />Oil and Grease, m /1 NA NA 10
<br />went Regulations
<br />State Effl
<br />Sues eci tc
<br />Selenium- u /1
<br />Various NA Various Water ali Standards
<br />u
<br />Metals Various NA Various Water Quality Standards
<br />,
<br />anics, u g17
<br />Various NA Various Water Quality Standards
<br />Whole Effluent Toxicity E
<br />Chronic
<br />Stat. Di & IC25>IWC
<br />State Permit Limitations
<br />Acute LC50> 100% State Permit Limitations
<br />Total Dissolved Solids, m /1 Report NA Re ort
<br />
<br />1
<br />Salini Regulations
<br />:1
<br />Total Phosphorus, m /1 Re ort NA 0.2-1.0 Control Regulations
<br />Footnotes ', ••, "•, and ---- can oe Iounu unum , nu,c ,,,-,
<br />Table III-d- Industrial Sand (subpart D) HF f lourdon facilities only
<br />Effluent Parameter Discharge Limitations xationate
<br /> 30 D Av 7 Da Av Dail Max
<br />m d
<br />Flow Report NA Re port
<br />Discharge Evaluation
<br />,
<br />Total Suspended Solids, lbs/day 0.0231bs per 1,000 lbs NA 0.0461bs per 1,000 lbs Federal Effluent Guidelines
<br /> total production *** total production"*
<br />s.u.
<br />H NA NA 6.5-9.0 Water Quality Standards
<br />,
<br />m A
<br />Oil and Grease NA NA 10 State Effluent Regulations
<br />,
<br />Total Fluoride, lbs/day 0.0031bs per 1,000 lbs NA 0.0061bs per 1,000 lbs Federal Effluent Guidelines
<br /> total production ***** total roduction****
<br />Production Rate, lbs/da Report NA Report ?Dischar a Evaluation
<br />Site specific
<br />Selenium, u R•
<br />Various
<br />NA
<br />Various
<br />Water ali Standards
<br />d
<br />m
<br />Fluoride NA NA 2 s
<br />Water ali Standar
<br />,
<br />Metals
<br />u g/7 Various NA Various Water Quality Standards
<br />,
<br />Or anics, u /1 Various NA Various Water ali Standards
<br />Whole Effluent Toxicity ET
<br />Chronic
<br />Stat. Di & IC25>IWC State Permit Re lations
<br />Acute LC50>100% State Permit Limitations
<br />Total Dissolved Solids, m Report NA Re ort Salini Re lations
<br />Total Phosphorus, mgR Report NA 0.2-1.0 Control Regulations
<br />Footnotes *, **, ***, and**** can be found under laote iii-i
<br />••••• This limitation will be calculated from the facility's production rate. The water quality-based limit for Fluoride applies only on Water Supply
<br />segments, and the more stringent limit (WQS, ELG) will apply.
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