STATE OF MISSOURI 

DEPARTMENT OF NATURAL RESOURCES 

MISSOURI CLEAN WATER COMMISSION 

MISSOURI STATE OPERATING PERMIT 

In compliance with the Missouri Clean Water Law, (Chapter 644 R.S. Mo. as amended, hereinafter, the Law), and the Federal Water

Pollution Control Act (Public Law 92-500, 92nd Congress) as amended, 

Permit No. MO-0098001 

Owner: Ameren UE 

Address: One Ameren Plaza, 1901 Chouteau Avenue, PO Box 66149, MC-602, 

 St. Louis, MO 63166-6149 

Continuing Authority: Same as above 

Address: Same as above 

Facility Name: Ameren UE, Callaway Power Plant 

Address: PO Box 620, Fulton, MO 65251 

Legal Description: See page 2 

Receiving Stream: See page 2 

First Classified Stream and ID: See page 2 

USGS Basin & Sub-watershed No.: See page 2 

is authorized to discharge from the facility described herein, in accordance with the effluent limitations and monitoring requirements 

as set forth herein:

FACILITY DESCRIPTION 

The Callaway Power Plant combined discharge line has a cumulative daily average flow of 5.64 MGD and a daily maximum flow of 

14.4 MGD. 

 See next page for individual outfall descriptions 

 

This permit authorizes only wastewater discharges under the Missouri Clean Water Law and the National Pollutant Discharge 

Elimination System; it does not apply to other regulated areas. This permit may be appealed in accordance with Section 644.051.6 of 

the Law. 

 February 13, 2009 April 14, 2010 

Effective Date Revised Date Mark N. Templeton, Director, Department of Natural Resources 

 

 February 12, 2014 

Expiration Date Scott B. Totten, Acting Director, Water Protection Program 
Page 2 of 21 

Permit No. MO-0098001 

FACILITY DESCRIPTION 

Outfall #001 – Radwaste Treatment System - SIC #4911 (Piped to Missouri River) 

This liquid radwaste system serves to collect, process, store, recycle and discharge treated waste water generated at Callaway. In 

addition, radioactive solids removed by this system are prepared for disposal and transported to a licensed off site disposal facility. 

Five general sub-systems can be defined as described below. 

The Boron Recycle System receives reactor coolant for the purpose of recovering the boric acid for reuse in the plant. Boric acid is 

used as a neutron absorber/moderator in the primary loop. 

The Liquid Radwaste System collects and processes floor and equipment drains from the containment, auxiliary building, fuel 

building and radwaste buildings during normal operation. 

The Laundry and Hot Shower system collects waste generated from washing radioactively contaminated protective gear and clothing

and personnel decontamination shower wastewater. These wastes are then transferred to the liquid Radwaste system for treatment. 

The Secondary Liquid Waste system is used to process condensate demineralizer regeneration wastes and potentially radioactive 

liquid waste collected from the turbine building. The condensate demineralizer regeneration waste is divided into two waste streams; 

High TDS waste from the acid and caustic rinses used when chemically regenerating spent resin, and low TDS waste which results 

from the initial backflushing of unregenerated resin and the final rinsing of the regenerated resin to remove acid and caustic.

Steam Generator Blowdown is normally recycled back to the main condenser for reuse in the secondary cycle. Provisions also exist to 

discharge the treated blowdown via #001. 

The following wastewater treatment systems are used as required to treat this waste stream for recycle or discharge in compliance with 

NRC requirements and are also available as auxiliary or backup treatment systems to treat this discharge for compliance with NPDES 

permit limitations: Evaporation and/or Mixing and/or Filtration and/or Carbon Absorption and/or Ion Exchange and/or Neutralization 

and/or Reuse/Recycle of Treated Effluent. All processing in the Radwaste Treatment System is done on a batch basis except steam 

generator blowdown. After monitoring for radioactive content, release rates are controlled administratively to ensure the "as low as 

practicable" radioactive discharge criteria are met. 

Daily average flow is 0.027 MGD. 

Daily maximum flow is 0.298 MGD 

Legal Description: NE 1⁄4, NE 1⁄4, Sec. 14, T46N, R8W, Callaway 

Latitude/Longitude: +3845424/-09146462 

Receiving Stream: Missouri River (P) 

First Classified Stream and ID: Missouri River (P) (00701) 

USGS Basin & Sub-watershed No.: (10300102-280004) 

Outfall #002 - Cooling Tower Blowdown: (Piped to Missouri River) 

Daily average flow is 4.84 MGD. 

Daily maximum flow is 14.4 MGD. 

This outfall consists of water from the Circulating Water System, the Service Water System, and the Essential Service Water (ESW) 

System. Blowdown from the cooling tower is necessary to maintain the dissolved solids concentration in the recirculating water

system within acceptable operating limits. The ESW System is not routinely used, however water from the ESW System does mix 

with the other systems as it is periodically run to demonstrate operability. Additionally, the ESW System can be used to maintain 

proper freeboard in the ultimate heat sink pond (see Outfall #017 description) by transferring water to the Service Water System. 

Legal Description: NW 1⁄4, NW 1⁄4, Sec. 13, T46N, R8W, Callaway 

Latitude/Longitude: +3845459/-09146388 

Receiving Stream: Missouri River (P) 

First Classified Stream and ID: Missouri River (P) (00701) 

USGS Basin & Sub-watershed No.: (10300102-280004) 
Page 3 of 21 

Permit No. MO-0098001 

Outfall #003 - Water Treatment Plant Wastes (Piped to Missouri River) 

Daily average flow is 0.0 MGD. 

Daily maximum flow is 1.645 MGD. 

(These flows represent wastewater discharged to the settling basin, actual discharge will vary depending on recycle.)Outfall #003 

consists of supernatant from a wastewater treatment lagoon that treats wastewater to remove solids. The wastewater that is treated in 

the lagoon is mainly from the blowdown of accumulated river solids in the water treatment plant clarifiers. The sand and carbon filter 

backwash, oil water separator and demineralizer system wastewater is also routed to this treatment lagoon. The oil water separator 

flow consists of wastewater from some plant sumps as well as flow from an oil recovery well that is being used to remediate a historic 

on-site release. Outfall #003 is normally recycled by routing it back to the head of the water treatment plant. 

Legal Description: SW 1⁄4, SW 1⁄4, Sec. 13, T46N, R8W, Callaway 

Latitude/Longitude: +3845065/-09146409 

Receiving Stream: Missouri River (P) 

First Classified Stream and ID: Missouri River (P) (00701) 

USGS Basin & Sub-watershed No.: (10300102-280004) 

Outfall #004 - Demineralizer System Wastes 

This discharge is now included under Outfall #003. 

Outfall #007 – 3 Cell Flow Through Lagoon (Piped to Missouri River) 

Daily average flow is 0.0 MGD. 

Daily Maximum flow is 0.040 MGD. 

Design Population Equivalent is 400. 

This outfall consists of a 3-cell lagoon designed to receive only sanitary, on-site cafeteria, and laboratory waste from the plant. Sludge 

will be stored in the lagoon. The effluent will then be discharged to a constructed wetland. The monitoring location will be at the 

third treatment cell. Outfall #007 is normally recycled by routing it to the water treatment plant headworks. 

Legal Description: SW 1⁄4, SW 1⁄4, Sec. 13, T46N, R8W, Callaway 

Latitude/Longitude: +3845123/-09146318 

Receiving Stream: Missouri River (P) 

First Classified Stream and ID: Missouri River (P) (00701) 

USGS Basin & Sub-watershed No.: (10300102-280004) 

Outfall #009 - Intake Heater Blowdown: (Located right on Missouri River) 

Daily average flow 0 MGD. 

Daily maximum flow is 0.006 MGD. 

The river intake structure contains two recirculating electric heaters which are used to prevent ice formation on the intake bar screens 

during the winter months. Outfall #009 consists of discharges from the infrequent blowdown or drainage of these boilers. 

Legal Description: NW 1⁄4, NW 1⁄4, Sec. 5, T45N, R7W, Callaway 

Latitude/Longitude: +3842127/-09144185 

Receiving Stream: Missouri River (P) 

First Classified Stream and ID: Missouri River (P) (00701) 

USGS Basin & Sub-watershed No.: (10300102-280004) 

Outfalls #010, #011, #012, #014 and #015 - Storm Water Runoff 

Average rainfall event is 0.7 MGD. 

Once in 10 year rainfall event is 38.5 MGD. 

These five outfalls discharge storm water runoff from plant and associated areas after treatment in settling ponds. "Non-process" 

discharges that will be discharged to SWR include three intermittent sources. Two sources are the quarterly testing of the fire 

protection drains and the infrequent draining of the demineralized water storage tank. The third source is the pumping of manholes, 

transformer and tank containments at the plant. These outfalls will be under a Storm Water Pollution Prevention Plan for this permit 

cycle, so no actual monitoring will take place. 
Page 4 of 21 

Permit No. MO-0098001 

Outfall #010:

 Daily average flow is dependent on precipitation. 

Maximum daily flow is 4.6 MGD 

Legal Description: SW 1⁄4, SW 1⁄4, Sec. 12, T46N, R8W, Callaway 

Latitude/Longitude: +3846088/-09146261 

Receiving Stream: Unnamed Tributary to Logan Creek (U) 

First Classified Stream and ID: Logan Creek (C) (00704) 

USGS Basin & Sub-watershed No.: (10300102-280004) 

Outfall #011: 

Daily average flow is dependent on precipitation. 

Daily Maximum flow is 19.7 MGD 

Legal Description: NW 1⁄4, SE 1⁄4, Sec. 12, T46N, R8W, Callaway 

Latitude/Longitude: +3846105/-09146002 

Receiving Stream: Unnamed Tributary to Logan Creek (U) 

First Classified Stream and ID: Logan Creek (C) (00704) 

USGS Basin & Sub-watershed No.: (10300102-280004) 

Outfall #012: 

Daily average flow is dependent on precipitation. . 

Daily Maximum flow is 6.6 MGD 

Legal Description: NE 1⁄4, SE 1⁄4, Sec. 14, T46N, R8W, Callaway 

Latitude/Longitude: +3845168/-09146531 

Receiving Stream: Tributary to Mud Creek (U) 

First Classified Stream and ID: Logan Creek (C) (00704) 

USGS Basin & Sub-watershed No.: (10300102-280004) 

Outfall #013: terminated 

Outfall #014: 

Daily average flow is dependent on precipitation. 

Daily Maximum flow is 4.8 MGD 

Legal Description: NW 1⁄4, SE 1⁄4, Sec. 11, T46N, R8W, Callaway 

Latitude/Longitude: +3846128/-09147052 

Receiving Stream: Cow Branch (U) 

First Classified Stream and ID: Cow Creek (C) (00707) 

USGS Basin & Sub-watershed No.: (10300102-280003) 

Outfall #015: 

Daily average flow is dependent on precipitation. 

Daily Maximum flow is 2.8 MGD 

Legal Description: SE 1⁄4, NE 1⁄4, Sec. 11, T46N, R8W, Callaway 

Latitude/Longitude: +3846232/-09146506 

Receiving Stream: Cow Branch (U) 

First Classified Stream and ID: Cow Creek (C) (00707) 

USGS Basin & Sub-watershed No.: (10300102-280003) 

Outfall #016 - Cooling Tower Bypass (Piped to Missouri River) 

Daily average flow is 0.777 MGD. 

Daily Maximum flow is 14.4 MGD. 

This outfall consists of clarified river water and wastewater that has been recycled through the water treatment plant. It is used to 

moderate flow through the water treatment plant and to provide carrier water in the discharge line when discharging from Outfall 

#001. 

Legal Description: NW 1⁄4, NW 1⁄4, Sec. 13, T46N, R8W, Callaway 

Latitude/Longitude: +3845328/-09146408 

Receiving Stream: Missouri River (P) 

First Classified Stream and ID: Missouri (P) (00701) 

USGS Basin & Sub-watershed No.: (10300102-280004) 
Page 5 of 21 

Permit No. MO-0098001 

Outfall #017 - Ultimate Heat Sink 

Daily average flow is 0 MGD. 

Daily Maximum flow is 0 MGD 

The Ultimate Heat Sink is a cooling pond that can provide cooling water to various plant systems during other than normal conditions. 

Outfall #017 is the overflow from the Ultimate Heat Sink to local runoff. It is a no discharge outfall. 

Legal Description: SE 1⁄4, NE 1⁄4, Sec. 14, T46N, R8W, Callaway 

Latitude/Longitude: +3845363/-09146441 

Receiving Stream: Unnamed Tributary to Logan Creek (U) 

First Classified Stream and ID: Logan Creek (C) (00704) 

USGS Basin & Sub-watershed No.: (10300102-280004) 

This is a no-discharge outfall. 
PAGE NUMBER 6 of 21

A. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS PERMIT NUMBER MO-0098001

The permittee is authorized to discharge from outfall(s) with serial number(s) as specified in the application for this permit. The final 

effluent limitations shall become effective upon issuance and remain in effect until expiration of the permit. Such discharges shall be 

controlled, limited and monitored by the permittee as specified below: 

FINAL EFFLUENT LIMITATIONS MONITORING 

OUTFALL NUMBER AND EFFLUENT 

PARAMETER(S) UNITS 

DAILY 

MAXIMUM 

WEEKLY 

AVERAGE 

MONTHLY 

AVERAGE 

MEASUREMENT SAMPLE 

FREQUENCY TYPE 

Outfall #001 - Radwaste System 

Flow 

Boron, Total Recoverable 

Total Suspended Solids 

Oil and Grease 

Biochemical Oxygen Demand5

pH – Units 

Total Residual Chlorine 

Temperature 

MGD 

mg/L 

mg/L 

mg/L 

mg/L 

SU 

mg/L 

C 

* 

* 

45 

20 

* 

** 

0.2 

* 

* 

* 

30 

15 

* 

** 

0.104 

* 

once/daily each batch 

each batch total 

once/daily grab 

each batch 

once/daily grab 

each batch 

once/month grab 

once/month grab 

once/daily grab 

each batch 

once/month grab 

once/month grab 

MONITORING REPORTS SHALL BE SUBMITTED QUARTERLY; THE FIRST REPORT IS DUE April 28, 2009. THERE SHALL 

BE NO DISCHARGE OF FLOATING SOLIDS OR VISIBLE FOAM IN OTHER THAN TRACE AMOUNTS. 

Acute Whole Effluent Toxicity (AWET) Test (Note 1) see special condition 12

MONITORING REPORTS SHALL BE SUBMITTED ONCE PER 5 YEARS; THE FIRST REPORT IS DUE January 28, 2010. THERE SHALL BE 

NO DISCHARGE OF FLOATING SOLIDS OR VISIBLE FOAM IN OTHER THAN TRACE AMOUNTS

B. STANDARD CONDITIONS 

IN ADDITION TO SPECIFIED CONDITIONS STATED HEREIN, THIS PERMIT IS SUBJECT TO THE ATTACHED Parts I & III

STANDARD CONDITIONS DATED October 1, 1980 and August 15, 1994, AND HEREBY INCORPORATED AS THOUGH 

FULLY SET FORTH HEREIN. 
PAGE NUMBER 7 of 21

A. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS PERMIT NUMBER MO-0098001

The permittee is authorized to discharge from outfall(s) with serial number(s) as specified in the application for this permit. The final 

effluent limitations shall become effective upon issuance and remain in effect until expiration of the permit. Such discharges shall be 

controlled, limited and monitored by the permittee as specified below: 

FINAL EFFLUENT LIMITATIONS MONITORING 

OUTFALL NUMBER AND EFFLUENT 

PARAMETER(S) UNITS 

DAILY 

MAXIMUM 

WEEKLY 

AVERAGE 

MONTHLY 

AVERAGE 

MEASUREMENT SAMPLE 

FREQUENCY TYPE 

TYPE 

Outfall #002 - Cooling Tower Blowdown 

Flow 

Total Suspended Solids 

Total Dissolved Solids 

Oil and Grease 

Total Residual Chlorine 

pH – Units 

Temperature 

MGD 

mg/L 

mg/L 

mg/L 

mg/L 

SU 

C 

* 

* 

* 

20 

0.2 

**** 

* 

* 

* 

* 

15 

0.104 

**** 

* 

once/day 24 hr. total 

once/week grab 

once/week grab 

once/quarter*** grab 

once/day grab 

continuous 24 hr. 

recorded 

 

once/day grab 

MONITORING REPORTS SHALL BE SUBMITTED QUARTERLY; THE FIRST REPORT IS DUE April 28, 2009. THERE SHALL 

BE NO DISCHARGE OF FLOATING SOLIDS OR VISIBLE FOAM IN OTHER THAN TRACE AMOUNTS. 

Acute Whole Effluent Toxicity (AWET) Test (Note 1) see special condition 12 

MONITORING REPORTS SHALL BE SUBMITTED ANNUALLY; THE FIRST REPORT IS DUE January 28, 2010. THERE 

SHALL BE NO DISCHARGE OF FLOATING SOLIDS OR VISIBLE FOAM IN OTHER THAN TRACE AMOUNTS. 

Chronic Whole Effluent Toxicity (CWET) Test (Note 1) see special condition 13 

MONITORING REPORTS SHALL BE SUBMITTED ONCE/ 5 YEARS; THE FIRST REPORT IS DUE January 28, 2010. THERE SHALL BE NO 

DISCHARGE OF FLOATING SOLIDS OR VISIBLE FOAM IN OTHER THAN TRACE AMOUNTS.

B. STANDARD CONDITIONS 

IN ADDITION TO SPECIFIED CONDITIONS STATED HEREIN, THIS PERMIT IS SUBJECT TO THE ATTACHED Parts I & III

STANDARD CONDITIONS DATED October 1, 1980 and August 15, 1994, AND HEREBY INCORPORATED AS THOUGH 

FULLY SET FORTH HEREIN. 
PAGE NUMBER 8 of 21

A. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS PERMIT NUMBER MO-0098001

The permittee is authorized to discharge from outfall(s) with serial number(s) as specified in the application for this permit. The final 

effluent limitations shall become effective upon issuance and remain in effect until expiration of the permit. Such discharges shall be 

controlled, limited and monitored by the permittee as specified below: 

FINAL EFFLUENT LIMITATIONS MONITORING REQUIREMENTS

OUTFALL NUMBER AND 

EFFLUENT PARAMETER(S) UNITS 

DAILY 

MAXIMUM 

WEEKLY 

AVERAGE 

MONTHLY 

AVERAGE 

MEASUREMENT SAMPLE 

FREQUENCY TYPE 

Outfall #003 - Water Treatment Plant 

Flow 

Total Suspended Solids 

Oil and Grease 

Total Residual Chlorine 

pH - Units 

MGD 

mg/L 

mg/L 

mg/L 

SU 

* 

100 

20 

0.2 

** 

* 

30 

15 

0.104 

** 

once/week 24 hr. total 

once/month grab 

once/month grab 

once/month grab 

once/month grab 

Outfall #004 - Demineralizer System (Now included under Outfall #003) 

Outfall #007 - Sanitary Waste 

Flow 

Biochemical Oxygen Demand 5

Total Suspended Solids 

pH – Units 

Ammonia as N 

Fecal Coliform 

Oil and Grease 

MGD 

mg/L 

mg/L 

SU 

mg/L 

cts/100mL 

mg/L 

* 

** 

* 

* 

15 

65 

110 

* 

45 

70 

** 

* 

* 

10 

once/quarter*** 24 hr. estimate 

 

once/quarter*** grab 

once/quarter*** grab 

once/quarter*** grab 

once/quarter*** grab 

once/quarter*** grab 

once/quarter*** grab 

Outfall #009 - Intake Heater Blowdown 

Flow 

Total Suspended Solids 

Oil and Grease 

pH - Units 

MGD 

mg/L 

mg/L 

SU 

* 

100 

20 

** 

* 

30 

15 

** 

once/week when 24 hr. 

discharge occurs total 

once/week when grab 

discharge occurs 

once/week when grab 

discharge occurs 

once/week when grab 

discharge occurs 

MONITORING REPORTS SHALL BE SUBMITTED QUARTERLY; THE FIRST REPORT IS DUE April 28, 2009. 

B. STANDARD CONDITIONS 

IN ADDITION TO SPECIFIED CONDITIONS STATED HEREIN, THIS PERMIT IS SUBJECT TO THE ATTACHED Parts I & III

STANDARD CONDITIONS DATED October 1, 1980 and August 15, 1994, AND HEREBY INCORPORATED AS THOUGH 

FULLY SET FORTH HEREIN. 
PAGE NUMBER 9 of 21 

A. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS PERMIT NUMBER MO-0098001 

The permittee is authorized to discharge from outfall(s) with serial number(s) as specified in the application for this permit. The final 

effluent limitations shall become effective upon issuance and remain in effect until expiration of the permit. Such discharges shall be 

controlled, limited and monitored by the permittee as specified below: 

FINAL EFFLUENT LIMITATIONS MONITORING REQUIREMENTS 

OUTFALL NUMBER AND EFFLUENT 

PARAMETER(S) UNITS 

DAILY 

MAXIMUM 

WEEKLY 

AVERAGE 

MONTHLY 

AVERAGE 

MEASUREMENT SAMPLE 

FREQUENCY TYPE 

Outfalls #010, #011, #012, #014 and #015 - Storm Water Runoff, and #017 ultimate heat sink note 2 

See special condition # 9 

MONITORING REPORTS SHALL NOT BE SUBMITTED. THERE SHALL BE NO DISCHARGE OF FLOATING SOLIDS OR 

VISIBLE FOAM IN OTHER THAN TRACE AMOUNTS

Outfall #016 Cooling tower bypass

Flow 

Total Suspended Solids 

Oil and Grease 

Total Residual Chlorine 

pH – Units 

Temperature 

MGD 

mg/L 

mg/L 

mg/L 

SU 

C 

* 

100 

20 

0.2 

** 

* 

* 

30 

15 

0.104 

** 

* 

once/quarter*** 24 hr. 

estimate 

 

once/quarter*** grab 

once/quarter*** grab 

once/quarter*** grab 

once/quarter*** grab 

once/quarter*** grab 

MONITORING REPORTS SHALL BE SUBMITTED QUARTERLY; THE FIRST REPORT IS DUE April 28, 2009. THERE SHALL 

BE NO DISCHARGE OF FLOATING SOLIDS OR VISIBLE FOAM IN OTHER THAN TRACE AMOUNTS. 

Acute Whole Effluent Toxicity (AWET) Test (Note 1) see special condition 12 

MONITORING REPORTS SHALL BE SUBMITTED ANNUALLY; THE FIRST REPORT IS DUE January 28, 2010. THERE 

SHALL BE NO DISCHARGE OF FLOATING SOLIDS OR VISIBLE FOAM IN OTHER THAN TRACE AMOUNTS. 

IN ADDITION TO SPECIFIED CONDITIONS STATED HEREIN, THIS PERMIT IS SUBJECT TO THE ATTACHED Parts I & III

STANDARD CONDITIONS DATED October 1, 1980 and August 15, 1994, AND HEREBY INCORPORATED AS THOUGH 

FULLY SET FORTH HEREIN. 

 

A. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (continued) 

 * Monitoring requirement only. 

 ** pH is measured in pH units and is not to be averaged. The pH is limited to the range of 6.0-9.0 pH units. 

 *** Sample once per quarter in the months of February, May, August, and November. 

   Permittee shall maintain the pH between 6.0 - 9.0 except excursions from the range are permitted subject to the following 

limitations: 

1. The total time during which the pH values are outside the required range of pH values shall not exceed 7 hours and 

26 minutes in any calendar month; and 

2. No individual excursion from the range of pH values shall exceed 60 minutes. 

Monitoring reports shall show each excursion, the duration of the excursion, and the total excursion time for each month. 

Should the continuous monitor fail for any reason, daily grab samples shall be provided until repairs are completed. 

** *** Discharge shall not cause temperature of the mixing zone to increase by more than 5 o

F 
Page 10 of 21 

Permit No. MO-0098001 

Note 1 – WET Test must coincide with resumption of discharge after application of the treatment’s molluscicide and algaecide. 

Sample taken for WET Test should be representative of a molluscicide and algaecide dosing event. If treatments are not used by

December, use December as the sampling month. 

Note 2-- Outfall #017 - Ultimate Heat Sink 

There shall be no discharge of wastewater from this outfall to waters of the state of Missouri. 

Note 3 -- The average of the temperature of outfall #002 will be used as the river discharge temperature for 316 (a) calculations. 

C. SPECIAL CONDITIONS

1. In issuing this permit, the Missouri Clean Water Commission and the Missouri Department of Natural Resources has not 

determined whether or not the radioactive discharges from this plant will affect waters of the state. Radioactive discharges are 

the responsibility of the Nuclear Regulatory Commission, and any discharges of these constituents will be under their 

regulation. 

2. Discharge Limitations - There shall be no discharge of polychlorinated biphenyl compounds. 

3. Pesticides

Any pesticide discharge from any point source shall comply with the requirements of the Federal Insecticide, Fungicide, and 

Rodenticide Act, as amended (7W.S.C. 136 et. seq.) and the use of such pesticides shall be in a manner consistent with its label. 

4. This permit may be reopened and modified, or alternatively revoked and reissued, to: 

(a) Comply with any applicable effluent standard or limitation issued or approved under Sections 301(b)(2)(C) and (D), 

304(b)(2), and 307(a) (2) of the Clean Water Act, if the effluent standard or limitation so issued or approved: 

(1) contains different conditions or is otherwise more stringent than any effluent limitation in the permit; or 

(2) controls any pollutant not limited in the permit. 

(b) Incorporate new or modified effluent limitations or other conditions, if the result of a waste load allocation study, 

toxicity test or other information indicates changes are necessary to assure compliance with Missouri’s Water Quality 

Standards. 

(c) Incorporate new or modified effluent limitations or other conditions if, as the result of a watershed analysis, a Total 

Maximum Daily Load (TMDL) limitation is developed for the receiving waters which are currently included in 

Missouri’s list of waters of the state not fully achieving the state’s water quality standards, also called the 303(d) list. 

(d) Incorporate any items or limitations concerning section 316 (a) and 316(b) of the Clean Water Act. 

The permit as modified or reissued under this paragraph shall also contain any other requirements of the Clean Water Act then 

applicable. 

5. The permittee shall conduct the following radiological monitoring: 

a. Liquid Radwaste discharge, surface water and drinking water supply: 

LOCATION FREQUENCY SAMPLE TYPE

I. Radwaste building discharge 

a) Batch Releases prior to each batch a representative 

grab sample of each 

batch discharge 

b) Steam Generator once per day a representative 

 Blowdown when discharging grab sample 

II. Upstream of discharge line once/month grab 

III. Downstream of discharge daily with composite 

line at Portland, MO monthly composite 

 analysis 
Page 11 of 21 

Permit No. MO-0098001 

Samples of Batch Releases are to be analyzed for tritium, I-131, and gamma isotopic for each batch; and for Sr-89, 

Sr-90, and Fe-55 in a quarterly composite of each batch. 

Samples of Steam Generator Blowdown are to be analyzed for tritium, I-131, and gamma isotopic in daily samples; 

and for Sr-89, Sr-90, and Fe-55 in a quarterly composite of daily samples. 

Samples of Surface Water are to be analyzed for tritium and gamma isotopic in monthly samples. 

b. Aquatic biota - semiannual sampling of the edible flesh of up to five commercially or recreationally important species of 

fish of sufficient quantity to yield a sufficient sample. Samples are to be taken at the locations specified in II and III. 

Samples are to be analyzed by gamma isotopic analysis. Catfish need not be included in sample. 

c. Bottom Sediment - semiannual samples of bottom sediment from the locations specified in II and III. Samples are to be 

analyzed by gamma isotopic analysis. 

d. Results of the above monitoring programs shall be reported to the Department by supplying a copy of the Annual 

Radiological Environmental Operating Report per Technical Specification 5.6.2 and the Annual Radioactive Effluent 

Release Report per Technical Specification 5.6.3 at the same time they are supplied to NRC. All data information shall 

be available for inspection during normal working hours. 

e. The Department of Natural Resources of the State of Missouri, and any other state agency or officer designated in the 

State's emergency response plan or any other plan to protect its citizens from radioactive liquid discharge from the 

Callaway Plant, shall receive within one hour of the event, notice of any unplanned or uncontrolled liquid radioactive 

release in accordance with 10 CFR 50.72(a) and notification of reportable events per 10 CFR 20.2203 that involve offsite releases of liquid radioactive material. 

6. Changes in Discharges of Toxic Substances 

The permittee shall notify the Director as soon as it knows or has reason to believe: 

(a) That any activity has occurred or will occur which would result in the discharge of any toxic pollutant which is not 

limited in the permit, if that discharge will exceed the highest of the following "notification levels:" 

(1) One hundred micrograms per liter (100 μg/L); 

(2) Two hundred micrograms per liter (200 μg/L) for acrolein and acrylonitrile; five hundred micrograms per liter 

(500 μg/L) for 2,5 dinitrophenol and for 2-methyl-4, 6-dinitrophenol; and one milligram per liter (1 mg/L) for 

antimony; 

(3) Five (5) times the maximum concentration value reported for the pollutant in the permit application; 

(4) The level established in Part A of the permit by the Director. 

(b) That they have begun or expect to begin to use or manufacture as an intermediate or final product or byproduct any toxic 

pollutant, which was not reported in the permit application. 

7. Permittee is exempt from section 311 and superfund reporting under 40 CFR 117.12 (a) 1-3 for the following chemicals: 

Ammonium Hydroxide, Ethylene Glycol, Hydrazine, Sodium Hydroxide, Sodium Hypochlorite, Sulfuric Acid, and 

 Phosphoric Acid. 

8. The 316 (b) study was done in 1984 and 1986. Since there have been no changes to the intake structure, the study is approved 

for this permit cycle. 

9. The company has elected to use Best Management Practices on Storm water outfalls. Monitoring is waived for this permit 

cycle. If problems occur, monitoring will be re-established by the department. Periodic inspection of these outfalls will be 

carried out by the permittee to ascertain that BMPs are working. The permittee will create and implement a Storm Water 

Pollution Prevention Plan that outlines the BMPs to be used. This will be kept at the site and must be made available to 

inspectors upon request. 

10. The Permittee has submitted a letter dated May 30, 2008 stating that none of the chemicals listed at 40 CFR 423 Appendix A as 

required at 40 CFR 423 .13 (d)(1) are used. This submittal is allowed at 40 CFR 423.13 (d) (3) and was submitted prior to the 

issuance of this permit. It is a part of the permit file for this facility. 

11. Reserved for heat issues. 
Page 12 of 21 

Permit No. MO-0098001 

12. Acute Whole Effluent Toxicity (WET) tests will be conducted as follows: 

SUMMARY OF ACUTE WET TESTING FOR THIS PERMIT 

OUTFALL AEC LC50%* FREQUENCY SAMPLE TYPE MONTH 

001 33.3% 

10%, unless 

diffusers in 

place 

Once/ 5 years when 

molluscicide is used 24 hr. composite Any, Report by 1-28-2010 

002 33.3% 

10%, unless 

diffusers in 

place 

Annually, when 

treatment’s 

molluscicide and 

algaecide are used in 

same month. 

24 hr. composite 

Any month treatments 

are applied--report in 

January. If no 

treatment by 

December, test in 

December 

016 33.3% 

10%, unless 

diffusers in 

place Same as #002 24 hr. composite Same as #002 

 LC50 = AEC / 0.3. 

Dilution Series 

100% 50% 25% 12.5% 6.25% (Control) 100% upstream, if 

available 

(Control) 100% Lab Water, 

also called synthetic water 

 (a) Test Schedule and Follow-Up Requirements 

(1) Perform a MULTIPLE-dilution acute WET test in the months and at the frequency specified above. For tests 

which are successfully passed, submit test results using the Department’s WET test report form #MO-780-1899 

along with complete copies of the test reports as received from the laboratory, including copies of chain-ofcustody forms within 30 calendar days of availability to the WATER PROTECTION PROGRAM, P.O. Box 176, 

Jefferson City, MO 65102. If the effluent passes the test, do not repeat the test until the next test period. 

(a) For discharges of stormwater, samples shall be collected within three hours from when discharge first 

occurs. 

(b) Samples submitted for analysis of stormwater discharges shall be collected as a grab. 

(c) For discharges of non-stormwater, samples shall be collected only when precipitation has not occurred for a 

period of forty-eight hours prior to sample collection. In no event shall sample collection occur 

simultaneously with the occurrence of precipitation excepting for stormwater samples. 

(d) A twenty-four hour composite sample shall be submitted for analysis of non-stormwater discharges. 

(e) Upstream receiving water samples, where required, shall be collected upstream from any influence of the 

effluent where downstream flow is clearly evident. 

(f) Samples submitted for analysis of upstream receiving water may be collected as either a grab or twentyfour-hour composite as appropriate to the nature of the discharge. 

(g) Chemical and physical analysis of the upstream control and effluent sample shall occur immediately upon 

being received by the laboratory, prior to any manipulation of the effluent sample beyond preservation 

methods consistent with federal guidelines for WET testing that are required to stabilize the sample during 

shipping. 

(h) Any and all chemical or physical analysis of the effluent sample performed in conjunction with the WET 

test shall be performed at the 100% Effluent concentration in addition to analyses performed upon any 

other effluent concentration. 

(i) All chemical analyses included in the Missouri Department of Natural Resources WET test report form 

#MO-780-1899 shall be performed and results shall be recorded in the appropriate field of the report form. 

(j) Where flow-weighted composite sample is required for analysis, the samples shall be composited at the 

laboratory where the test is to be performed. 

(k) Where in stream testing is required downstream from the discharge, sample collection shall occur 

immediately below the established Zone of Initial Dilution in conjunction with or immediately following a 

release or discharge. 
Page 13 of 21 

Permit No. MO-0098001 

(l) Samples submitted for analysis of downstream receiving water may be collected as either a grab or twentyfour-hour composite as appropriate to the nature of the discharge. 

(m) All instream samples, including downstream samples, shall be tested for toxicity at the 100% concentration 

in addition to any other assigned AEC for in-stream samples. 

(2) All failing test results along with complete copies of the test reports as received from the laboratory, INCLUDING 

THOSE TESTS CONDUCTED UNDER CONDITION (3) BELOW, shall be reported to the WATER 

PROTECTION PROGRAM, P.O. Box 176, Jefferson City, MO 65102 within 14 calendar days of the availability 

of the results. 

(3) If the effluent fails the test, a multiple dilution test shall be performed for BOTH test species within 30 calendar 

days and biweekly thereafter (for storm water, tests shall be performed on the next and subsequent storm water 

discharges as they occur, but not less than 7 days apart) until one of the following conditions are met: 

(a) THREE CONSECUTIVE MULTIPLE-DILUTION TESTS PASS. No further tests need to be performed 

until next regularly scheduled test period. 

(b) A TOTAL OF THREE MULTIPLE-DILUTION TESTS FAIL. 

(4) Failure of at WET tests is a violation of this permit. 

(5) The permittee shall submit a summary of all test results for the test series along with complete copies of the test 

reports as received from the laboratory to the WATER PROTECTION PROGRAM, P.O. Box 176, Jefferson City, 

MO 65102 within 14 calendar days of the third failed test. 

(6) Additionally, the following shall apply upon failure of the third MULTIPLE DILUTION test: A toxicity 

identification evaluation (TIE) or toxicity reduction evaluation (TRE) is automatically triggered. The permittee 

shall contact THE WATER PROTECTION PROGRAM within 14 calendar days from availability of the test 

results to ascertain as to whether a TIE or TRE is appropriate. The permittee shall submit a plan for conducting a 

TIE or TRE to the WATER PROTECTION PROGRAM within 60 calendar days of the date of DNR's direction to 

perform either a TIE or TRE. This plan must be approved by DNR before the TIE or TRE is begun. A schedule 

for completing the TIE or TRE shall be established in the plan approval. 

(7) Upon DNR's approval, the TIE/TRE schedule may be modified if toxicity is intermittent during the TIE/TRE 

investigations. A revised WET test schedule may be established by DNR for this period. 

(8) If a previously completed TIE has clearly identified the cause of toxicity, additional TIEs will not be required as 

long as effluent characteristics remain essentially unchanged and the permittee is proceeding according to a DNR 

approved schedule to complete a TRE and reduce toxicity. Regularly scheduled WET testing as required in the 

permit, without the follow-up requirements, will be required during this period. 

 (9) Submit a concise summary in tabular format of all WET test results with the annual report. 

(b) PASS/FAIL procedure and effluent limitations: 

(1) To pass a multiple-dilution test: 

(a) For facilities with a computed percent effluent at the edge of the zone of initial dilution, Allowable Effluent 

Concentration (AEC) OF 30% OR LESS, the AEC must be less than three-tenths (0.3) of the LC50

concentration for the most sensitive of the test organisms; OR, 

(b) For facilities with an AEC greater than 30%, the LC50 concentration must be greater than 100%; AND, 

(c) All effluent concentrations equal to or less than the AEC must be nontoxic. Mortality observed in all 

effluent concentrations equal to or less than the AEC shall not be significantly different (at the 95% 

confidence level; p = 0.05) than that observed in the upstream receiving-water control sample. Where 

upstream receiving water is not available mortality observed in the AEC test concentration shall not be 

significantly different (at the 95% confidence level; p = 0.05) than that observed in the laboratory control. 

The appropriate statistical tests of significance shall be consistent with the most current edition of 

METHODS FOR MEASURING THE ACUTE TOXICITY OF EFFLUENTS AND RECEIVING 

WATERS TO FRESHWATER AND MARINE ORGANISMS or other federal guidelines as appropriate or 

required. Failure of one multiple-dilution test may be considered an effluent limit violation. 
Page 14 of 21 

Permit No. MO-0098001 

(c) Test Conditions 

(1) Test Type: Acute Static non-renewal 

(2) All tests, including repeat tests for previous failures, shall include both test species listed below. 

(3) Test species: Ceriodaphnia dubia and Pimephales promelas (fathead minnow). Organisms used in WET testing 

shall come from cultures reared for the purpose of conducting toxicity tests and cultured in a manner consistent 

with the most current USEPA guidelines. All test animals shall be cultured as described in the most current 

edition of Methods for Measuring the Acute Toxicity of Effluents and Receiving Waters to Freshwater and 

Marine Organisms. 

(4) Test period: 48 hours at the "Acceptable Effluent Concentration" (AEC) specified above. 

(5) Upstream receiving stream water shall be used as dilution water. If upstream water is unavailable or if mortality 

in the upstream water exceeds 10%, "reconstituted" water will be used as dilution water. Procedures for 

generating reconstituted water will be supplied by the MDNR upon request. 

(6) Multiple-dilution tests will be run with: 

(a) 100%, 50%, 25%, 12.5%, and 6.25% effluent, unless the AEC is less than 25% effluent, in which case 

dilutions will be 4 times the AEC, two times the AEC, AEC, 1/2 AEC and 1/4 AEC; 

(b) 100% receiving-stream water (if available), collected upstream of the outfall at a point beyond any influence 

of the effluent; and 

(c) Reconstituted water. 

(7) If reconstituted-water control mortality for a test species exceeds 10%, the entire test will be rerun. 

(8) If upstream control mortality exceeds 10%, the entire test will be rerun using reconstituted water as the dilutant. 
 Page 15 of 21 

Permit No. MO-0098001 

SUMMARY OF TEST METHODOLOGY FOR WHOLE-EFFLUENT TOXICITY TESTS 

Whole-effluent-toxicity test required in NPDES permits shall use the following test conditions when performing single or multiple 

dilution methods. Any future changes in methodology will be supplied to the permittee by the Missouri Department of Natural 

Resources (MDNR). Unless more stringent methods are specified by the DNR, the procedures shall be consistent with the most 

current edition of Methods for Measuring the Acute Toxicity of Effluents and Receiving Waters to Freshwater and Marine Organisms, 

Test conditions for Ceriodaphnia dubia:

Test duration: 48 h 

Temperature: 25  1°C Temperatures shall not deviate by more than 3°C during 

the test. 

Light Quality: Ambient laboratory illumination 

Photoperiod: 16 h light, 8 h dark 

Size of test vessel: 30 mL (minimum) 

Volume of test solution: 15 mL (minimum) 

Age of test organisms: <24 h old 

No. of animals/test vessel: 5 

No. of replicates/concentration: 4 

No. of organisms/concentration: 20 (minimum) 

Feeding regime: None (feed prior to test) 

Aeration: None 

Dilution water: Upstream receiving water; if no upstream flow, synthetic water 

modified to reflect effluent hardness. 

Endpoint: Pass/Fail (Statistically significant Mortality when compared to 

upstream receiving water control or synthetic control if upstream 

water was not available at p< 0.05) 

Test acceptability criterion: 90% or greater survival in controls 

Test conditions for (Pimephales promelas): 

Test duration: 48 h 

Temperature: 25  1°C Temperatures shall not deviate by more than 3°C during 

the test. 

Light Quality: Ambient laboratory illumination 

Photoperiod: 16 h light/ 8 h dark 

Size of test vessel: 250 mL (minimum) 

Volume of test solution: 200 mL (minimum) 

Age of test organisms: 1-14 days (all same age) 

No. of animals/test vessel: 10 

No. of replicates/concentration: 4 (minimum) single dilution method 

 2 (minimum) multiple dilution method 

No. of organisms/concentration: 40 (minimum) single dilution method 

 20 (minimum) multiple dilution method 

Feeding regime: None (feed prior to test) 

Aeration: None, unless DO concentration falls below 4.0 mg/L; rate should 

not exceed 100 bubbles/min. 

Dilution water: Upstream receiving water; if no upstream flow, synthetic water 

modified to reflect effluent hardness. 

Endpoint: Pass/Fail (Statistically significant Mortality when compared to 

upstream receiving water control or synthetic control if upstream 

water was not available at p< 0.05) 

Test Acceptability criterion: 90% or greater survival in controls 
 Page 16 of 21 

Permit No. MO-0098001 

13. Chronic Whole Effluent Toxicity (CWET) Tests shall be conducted as follows: 

SUMMARY OF CHRONIC WET TESTING FOR THIS PERMIT 

OUTFALL 

CHRONIC 

CRITICAL DILUTION 

(CCD) % ** 

EFFLUENT 

DILUTION 

SERIES 

 (one dilution must be CCD) 

FREQUENCY SAMPLE 

TYPE 

MONTH 

#002 10% by default unless 

diffusers in place 40, 20,10,5, 2.5 % Once per 5 

years, when 

treatment’s 

molluscicide 

and algaecide 

are used in 

same month 

 

24 hr 

composite Any, month 

treatment are 

applied--report 

in January 

2010. If no 

treatments by 

December, test 

in December 

 If the CCD is 25% or less dilutions will be 4 times the CCD, two times the CCD, CCD, 1/2 CCD and 1/4 CCD. No CCD can be 

less than 10% unless an approved diffuser is in place. 

Test Parameter to be reported 

Pass/Fail Survival [TLP3B]+ 

No Observable Effect Concentration (lethal) 

on Survival [TOP3B]+ 

Lowest Observable Effect Concentration 

(lethal) on Survival [TXP3B]+ 

% Mortality at Critical Dilution [TJP3B]+ 

Pass/Fail Reproduction [TGP3B]+ 

No Observable Effect Concentration 

(sublethal) on Reproduction [TPP3B]+ 

Lowest Observable Effect Concentration 

(sublethal) on Reproduction 

[TYP3B]+ 

Ceriodaphnia dubia, 7-

day chronic NOEC 

static renewal, 

freshwater 

Highest % Coefficient of Variation* 

[TQP3B]+ 

Pass/Fail Survival [TLP6C]+ 

No Observable Effect Concentration (lethal) 

on Survival [TOP6C] + 

Lowest Observable Effect Concentration 

(lethal) on Survival [TXP6C] + 

% Mortality at Critical Dilution [TJP6C]+ 

Pass/Fail Growth [TGP6C]+ 

No Observable Effect Concentration 

(sublethal) on Growth [TPP6C] + 

Lowest Observable Effect Concentration 

(sublethal) on Growth [TYP6C]+ 

Pimephales promelas

(Fathead minnow), 7-

day chronic NOEC 

static renewal, 

freshwater 

Highest % Coefficient of Variation * 

[TQP6C] + 

 

 * for the Chronic Critical Dilution or Control + items in brackets are for WPP use only 

** CCD= (design flow of outfall in cfs) / ((7Q10*0.25) + design flow of outfall in cfs)), but not less than 10% unless 

diffuser in place. 
 Page 17 of 21 

Permit No. MO-0098001 

(a) Chronic WET Test Schedule and Follow-Up Requirements 

(1) Perform a CHRONIC MULTIPLE-dilution test in the months and at the frequency specified above. For tests 

which are successfully passed, submit test with complete copies of the test reports as received from the laboratory, 

including copies of chain-of-custody forms within 30 calendar days of availability to the WATER PROTECTION 

PROGRAM, P.O. Box 176, Jefferson City, MO 65102. If the effluent passes the chronic test, do not repeat the test 

until the next test period. 

(a) A twenty-four hour composite sample shall be submitted for analysis of non-stormwater discharges. 

(b) Upstream receiving water samples shall be collected upstream from any influence of the effluent discharge. 

(c) Samples submitted for analysis of upstream receiving water may be collected as a grab. 

(d) Chemical and physical analysis of the upstream control and effluent sample shall occur immediately upon 

being received by the laboratory, prior to any manipulation of the effluent sample beyond preservation 

methods consistent with federal guidelines for WET testing that are required to stabilize the sample during 

shipping. 

(e) Any and all chemical or physical analysis of the effluent sample performed in conjunction with the chronic 

WET test shall be performed at the CCD effluent concentration and the 100% effluent concentration. 

(f) (reserved) 

(g) Where flow-weighted composite sample is required for analysis, the samples shall be composited at the 

laboratory where the test is to be performed. 

(h) Where in stream testing is required downstream from the discharge, sample collection shall occur 

immediately below the established Zone of Initial Dilution in conjunction with or immediately following a 

release or discharge. 

(i) Samples submitted for analysis of downstream receiving water may be collected as a twenty-four-hour 

composite. 

(j) All instream samples, including downstream samples, shall be tested for toxicity at the 100% concentration 

in addition to any other assigned CCD for in-stream samples. 

(k) If the upstream water is unsatisfactory as a result of instream toxicity, the permittee must submit the test 

results exhibiting receiving water toxicity with the full test report and may thereafter substitute synthetic 

dilution water for the receiving water in all subsequent tests. 

(2) All failing test results along with complete copies of the test reports as received from the laboratory, INCLUDING 

THOSE TESTS CONDUCTED UNDER CONDITION (3) BELOW, shall be reported to the WATER 

PROTECTION PROGRAM, P.O. Box 176, Jefferson City, MO 65102 within 14 calendar days of the availability 

of the results. 

(3) If the effluent fails the test, another multiple dilution test shall be performed within 30 calendar days and biweekly 

thereafter, until one of the following conditions are met: 

(a) TWO CONSECUTIVE MULTIPLE-DILUTION TESTS PASS. No further tests need to be performed 

until next regularly scheduled test period. 

(b) A TOTAL OF THREE MULTIPLE-DILUTION TESTS FAIL. 

(9) Failure of at least two multiple-dilution tests during any period of accelerated monitoring violates the permit and 

the narrative requirement for aquatic life protection. 

(10) The permittee shall submit a summary of all chronic test results for the test series along with complete copies of 

the test reports as received from the laboratory to the WATER PROTECTION PROGRAM, P.O. Box 176, 

Jefferson City, MO 65102 within 14 calendar days of the second failed test. 

(11) Additionally, the following shall apply upon failure of the third MULTIPLE DILUTION test: A chronic toxicity 

identification evaluation (TIE) or chronic toxicity reduction evaluation (TRE) is automatically triggered. The 

permittee shall contact THE WATER PROTECTION PROGRAM within 14 calendar days from availability of 

the test results to ascertain as to whether a chronic TIE or chronic TRE is appropriate. The permittee shall submit 

a plan for conducting a chronic TIE or TRE to the WATER PROTECTION PROGRAM within 60 calendar days 

of the date of DNR's direction to perform either a chronic TIE or TRE. This plan must be approved by DNR 

before the chronic TIE or TRE is begun. A schedule for completing the chronic TIE or TRE shall be established 

in the plan approval. 

(12) Upon DNR's approval, the chronic TIE/TRE schedule may be modified if toxicity is intermittent during the 

chronic TIE/TRE investigations. A revised WET test schedule may be established by DNR for this period. 

(13) If a previously completed chronic TIE has clearly identified the cause of toxicity, additional chronic TIEs may not 

be required as long as effluent characteristics remain essentially unchanged and the permittee is proceeding 

according to a DNR approved schedule to complete a chronic TRE and reduce toxicity. The time period for 

completing a TRE shall not exceed 28 months. 
 Page 18 of 21 

Permit No. MO-0098001 

 

(14) During the period that a TRE is being conducted, quarterly chronic WET testing will be required (without the 

follow-up requirements) even if the permit calls for yearly testing only. 

(10) When WET test sampling is required to run over one DMR period, each DMR report shall contain a copy of the 

Department’s WET test report form that was generated during the reporting period. 

(11) Submit a concise summary in tabular format of all WET test results with the annual report. 

(b) Test Conditions 

(9) Test Type: Chronic Static renewal 

(10) All tests, including repeat tests for previous failures, shall include both test species listed below. 

(11) Test species: Ceriodaphnia dubia and Pimephales promelas (fathead minnow). Organisms used in WET testing 

shall come from cultures reared for the purpose of conducting toxicity tests and cultured in a manner consistent 

with the most current USEPA guidelines. All test animals shall be cultured as described in the most current 

edition of Short Term Methods for Measuring the Chronic Toxicity of Effluents and Receiving Waters to 

Freshwater Organisms. 

(12) Upstream receiving stream water shall be used as dilution water. If upstream water is unavailable or if mortality 

in the upstream water exceeds 20%, "reconstituted" water will be used as dilution water. Procedures for 

generating constituted water will be supplied by the MDNR upon request. 

(13) Multiple-dilution tests will be run with the dilution series indicated at the beginning of this special condition and 

100% receiving-stream water (if available), collected upstream of the outfall at a point beyond any influence of 

the effluent. 

(14) If reconstituted-water control mortality for a test species exceeds 20%, the entire test will be rerun. 

(15) If upstream control mortality exceeds 20%, the entire test will be rerun using reconstituted water as the dilutant. 

(16) See the attachment to the permit entitled “Summary of Test Conditions and Methods for Chronic Whole Effluent 

Toxicty Tests” for more test conditions. 

(c) Methodology 

 

(1) Ceriodaphnia dubia chronic static renewal 7-day survival and reproduction test, Method 1002.0, EPA-821-R-02-

013 (October 2002. A minimum of ten (10) replicates with one (1) organism per test chamber, must be used in 

the control and in each of the 5 effluent dilutions of this test. One of the effluent dilutions must be the critical 

dilution as specified in the permit special conditions. This test should be terminated when 60% of the surviving 

females in the control produce three broods or at the end of eight days, whichever comes first. If these criteria are 

not met at the end of 7 days, the test must be repeated. 

(2) Pimephales promelas (Fathead minnow) chronic static renewal 7-day larval survival and growth test, Method 

1000.0, EPA-821-R-02-013 (October 2002). A minimum of five (5) replicates with ten (10) organisms per 

replicate must be used in the control and in each of the 5 effluent dilutions of this test. One of the effluent 

dilutions must be the critical dilution as specified in the permit special conditions. This test should be terminated 

at the end of 7 days. 

(3) The NOECL (No Observed Lethal Effect Concentration) is defined as the greatest effluent dilution at and below 

which lethality that is statistically different from the control (0% effluent) at the 95% confidence level does not 

occur. Chronic lethal test failure (chronic NOECL test) is defined as a demonstration of a statistically significant 

lethal effect at test completion to a test species at or below the critical dilution. 

(4) The NOECS (No Observed Sublethal Effect Concentration) is defined as the greatest effluent dilution at and 

below which sublethality (inhibited reproduction in the Ceriodaphnia dubia test or inhibited growth in the 

Fathead minnow test) that is statistically different from the control (0% effluent) at the 95% confidence level does 

not occur. Chronic sublethal test failure (chronic NOECS test) is defined as a demonstration of a statistically 

significant sublethal effect at test completion to a test species at or below the critical dilution. 

(d) Test acceptance 

(1) The permittee shall repeat a test, including the control and all effluent dilutions, if the procedures and quality 

assurance requirements defined in the test methods or in this permit are not satisfied, including the following 

additional criteria: 

(2) The toxicity test control (0% effluent) must have survival equal to or greater than 80%. 
 Page 19 of 21 

Permit No. MO-0098001 

(3) The mean number of Ceriodaphnia dubia neonates produced per surviving female in the control (0% effluent) 

must be 15 or more. 

(4) Sixty (60) percent or more of the surviving Ceriodaphnia dubia control females must produce three broods. 

(5) The mean dry weight of the surviving Fathead minnow larvae at the end of the 7 days in the control ( 0% effluent) 

must be 0.25 mg per larvae or greater. 

(6) The percent coefficient of variation between replicates shall be 40% or less in the control (0% effluent) for the 

young of surviving females in the Ceriodaphnia dubia reproduction test and for the growth and survival endpoints 

of the Fathead minnow test. 

(7) The percent coefficient of variation between replicates shall be 40% or less in the critical dilution, unless 

significant lethal or sublethal effects are exhibited for the young of surviving females in the Ceriodaphnia dubia

reproduction test and for the growth and survival endpoints of the Fathead minnow test. 

(17) 60% or more of the surviving Ceriodaphnia dubia in the control or all of the dilutions must be female. This must 

be confirmed at the end of the test. 

(e) Statistical Interpretation 

(1) For the Ceriodaphnia dubia survival test, the statistical analyses used to determine if there is a significant 

difference between the control and the critical dilution shall be in accordance with the methods for determining 

the No Observed Effect Concentration (NOEC) as described in EPA-821-R-02-013 or most recent update 

(2) For the Ceriodaphnia dubia reproduction test and the Fathead minnow larval survival and growth test, the 

statistical analyses used to determine if there is a significant difference between the control and the critical 

dilution shall be in accordance with the methods for determining the No Observed Effect Concentration (NOEC) 

as described in EPA-821-R-02-013 or most recent update. 03-07 
Page 20 of 21 

Permit No. MO-0098001 

 

 SUMMARY OF TEST CONDITIONS AND METHODS FOR CHRONIC WHOLE-EFFLUENT TOXICITY TESTS 

Chronic Whole Effluent Toxicity tests required in NPDES permits shall use the following test conditions when performing single or 

multiple dilution methods. Any future changes in methodology will be supplied to the permittee by the Missouri Department of 

Natural Resources (MDNR). Unless more stringent methods are specified by the DNR, the procedures shall be consistent with the 

most current edition of Short Term Methods for Measuring the Chronic Toxicity of Effluents and Receiving Waters to Freshwater 

Organisms. 

Test conditions for Ceriodaphnia dubia:

Test type: static renewal 

Duration 7 days, or when 60% of control animals produce 3 broods, but not 

more than 8 days 

Effect measured decrease in reproduction, death 

Temperature: 25  1°C Temperatures shall not deviate by more than 3°C during 

the test. 

Light Quality: Ambient laboratory illumination (50-100 ft-c) 

Photoperiod: 16 h light, 8 h dark 

Size of test vessel: 30 mL (minimum) 

Volume of test solution: 15 mL (minimum) 

Test solution replacement frequency Daily 

Age of test organisms: less than 24 hour old 

No. of test concentration 5, one must be the critical dilution indicated in permit special 

conditions for chronic WET tests 

No. of animals/test vessel: 1 

No. of replicates/concentration: 10 

No. of organisms/concentration: 10 

Feeding regime: 0.1 mg/day of trout chow, cerophyll, and yeast 

Aeration: None 

Dilution water: Upstream receiving water; if no upstream flow, synthetic water 

modified to reflect effluent hardness. 

Endpoint: The highest concentration that causes no observed effect (NOEC) 

and the lowest concentration that does cause an effect LOEC) for 

survival and reproduction 
 Page 21 of 21 

Permit No. MO-0098001 

Test conditions for (Pimephales promelas): 

Test type Static renewal 

Test duration: 7 days 

Effect measured decrease in growth (weight), death 

Temperature: 25  1°C Temperatures shall not deviate by more than 3°C during 

the test. 

Light Quality: Ambient laboratory illumination (50-100 ft-c) 

Photoperiod: 16 h light/ 8 h dark 

Size of test vessel: 300-500 mL (minimum) 

Volume of test solution: 250 mL (minimum) 

Test solution replacement frequency Daily 

Age of test organisms: less than 48 hours (all same age within 8 hours) 

No. of test concentrations 5, one must be the critical dilution indicated in permit special 

conditions for chronic WET test 

No. of animals/test vessel: 10 

No. of replicates/concentration: 5 (minimum) 

No. of organisms/concentration: 50 (minimum) single dilution method 

Feeding regime: 0.1 ml containing 700-1000 brine shrimp 3 times a day at 4 hour 

intervals 

Aeration: None, unless DO concentration falls below 4.0 mg/L; rate should 

not exceed 100 bubbles/min. 

Dilution water: Upstream receiving water; if no upstream flow, synthetic water 

modified to reflect effluent hardness. 

Endpoint: The highest concentration that causes no observed effect (NOEC) 

and the lowest concentration that does cause an effect LOEC) for 

survival and growth 

(03-07) 

 
Missouri Department of Natural Resources 

FACT SHEET

FOR THE PURPOSE OF RENEWAL OF MO-0098001 

AMEREN UE, CALLAWAY POWER PLANT

The Federal Water Pollution Control Act ("Clean Water Act" Section 402 Public Law 92-500 as amended) established the National 

Pollution Discharge Elimination System (NPDES) permit program. This program regulates the discharge of pollutants from point 

sources into the waters of the United States, and the release of storm water from certain point sources. All such discharges are 

unlawful without a permit (Section 301 of the "Clean Water Act"). After a permit is obtained, a discharge not in compliance with all 

permit terms and conditions is unlawful. Missouri State Operating Permits (MSOPs) are issued by the Director of the Missouri 

Department of Natural Resources (department) under an approved program, operating in accordance with federal and state laws 

(Federal "Clean Water Act" and "Missouri Clean Water Law" Section 644 as amended). MSOPs are issued for a period of five (5) 

years unless otherwise specified. 

As per [40 CFR Part 124.8(a)] and [10 CSR 20-6.020(1)2.] a Factsheet shall be prepared to give pertinent information regarding the 

applicable regulations, rationale for the development of effluent limitations and conditions, and the public participation process for the 

Missouri State Operating Permit (operating permit) listed below. 

A Factsheet is not an enforceable part of an operating permit. 

This Factsheet is for a Major , Industrial Facility 

Part I – Facility Information

Facility Type: Industrial 

Facility SIC Code(s): 4911 

Facility Description: nuclear power plant 

Application Date: March 20. 2008 

Expiration Date: October 2, 2008 

Last Inspection: In Compliance ; 

OUTFALL(S) TABLE: 

OUTFALL

DESIGN FLOW 

(CFS) TREATMENT LEVEL EFFLUENT TYPE

DISTANCE TO

CLASSIFIED SEGMENT (MI)

#001 0.46 none Rad waste 0 

#002 22.32 none Cool tower blowdown 0 

#003 2.55 none Water treatment plant waste 0 

#007 0.06 Sanitary waste 

water lagoon Sanitary waste water lagoon 0 

#009 0.009 Intake heater 

blowdown Intake heater blowdown 0 

#010 7.13 Settling pond Storm Water 1.5 

#011 30.54 Settling pond Storm Water 2.0 

#012 10.23 Settling pond Storm Water 4.5 

#013 eliminated --- Now flows to #012 --- 

#014 7.44 Settling pond Storm Water 4.0 

#015 4.34 Settling pond Storm Water 4.0 

#016 22.32 Settling pond Cooling Tower bypass 0 

#017 0 none Ultimate heat sink 0 
Water Quality History: No significant non compliances. Had radiation (Tritium) leak in main discharge pipeline. New line is now 

completed. 

Comments: All radioactive analytes are regulated by Nuclear Regulatory Commission, not the Missouri Department of Natural 

Resources. 

Part II – Operator Certification Requirements

As per [10 CSR 20-6.010(8) Terms and Conditions of a Permit], permittees shall operate and maintain facilities to comply with the 

Missouri Clean Water Law and applicable permit conditions and regulations. Operators or supervisors of operations at regulated

wastewater treatment facilities shall be certified in accordance with [10 CSR 20-9.020(2)] and any other applicable state law or 

regulation. As per [10 CSR 20-9.010(2)(A)], requirements for operation by certified personnel shall apply to all wastewater treatment 

systems, if applicable, as listed below: 

Check boxes below that are applicable to the facility; 

 Population Equivalent greater than two hundred (200): 

This facility currently requires an operator with D Certification Level. Please see Appendix 1 - Classification Worksheet. 

Modifications made to the wastewater treatment facility may cause the classification to be modified. 

Operator’s Name: Steven Weiss, Ameren Services, 1901 Chouteau Ave, St. Louis, MO 63166 

Certification Number: 9639 

Certification Level: A 

Part III – Receiving Stream Information

APPLICABLE DESIGNATIONS OF WATERS OF THE STATE: 

As per Missouri’s Effluent Regulations [10 CSR 20-7.015], the waters of the state are divided into the below listed seven (7) 

categories. Each category list effluent limitations for specific parameters, which are presented in each outfall’s Effluent Limitation 

Table and further discussed in the Derivation & Discussion of Limits section. 

Missouri or Mississippi River [10 CSR 20-7.015(2)]: 

 

 

10 CSR 20-7.031 Missouri Water Quality Standards, the department defines the Clean Water Commission water quality objectives in

terms of "water uses to be maintained and the criteria to protect those uses." The receiving stream and/or 1st classified receiving 

stream’s beneficial water uses to be maintained are located in the Receiving Stream Table located below in accordance with [10 CSR 

20-7.031(3)]. 

RECEIVING STREAM(S) TABLE: 

WATERBODY NAME CLASS WBID DESIGNATED USES* 

Mud Creek U -- Narrative criteria 

Logan Creek U -- Narrative criteria 

Cow Branch U -- Narrative criteria 

Missouri River P 00701 IRR,LWW,AQL,SCR, 

DWS,IND,WBC*** 

8-DIGIT 

HUC 

10300102 

EDU** 

OZARK/

MOREAU/

LOUTRE

* - Irrigation (IRR), Livestock & Wildlife Watering (LWW), Protection of Warm Water Aquatic Life and Human Health-Fish 

Consumption (AQL), Cool Water Fishery(CLF), Cold Water Fishery (CDF), Whole Body Contact Recreation (WBC), Secondary 

Contact Recreation (SCR), Drinking Water Supply (DWS), Industrial (IND), Groundwater (GRW). 

** - Ecological Drainage Unit 

*** - UAA conducted on 7-13-2005 and approved on DATE or disapproved on DATE. 
RECEIVING STREAM(S) LOW-FLOW VALUES TABLE: 

LOW-FLOW VALUES (CFS) RECEIVING STREAM (U, C, P) 1Q10 7Q10 30Q10 

Cow Creek U 0 0 0 

Mud Creek U 0 0 0 

Logan Creek U 0 0 0 

Missouri River P 61,000 

MIXING CONSIDERATIONS TABLE:

MIXING ZONE (CFS) 

[10 CSR 20-7.031(4)(A)4.B.(II)(a)] 

ZONE OF INITIAL DILUTION (CFS) 

[10 CSR 20-7.031(4)(A)4.B.(II)(b)] 

1Q10 7Q10 30Q10 1Q10 7Q10 30Q10 

15,250 1,525 

RECEIVING STREAM MONITORING REQUIREMENTS:

No receiving water monitoring requirements recommended at this time. 

Part IV – Rationale and Derivation of Effluent Limitations & Permit Conditions

ALTERNATIVE EVALUATIONS FOR NEW FACILITIES: 

As per [10 CSR 20-7.015(4)(A)], discharges to losing streams shall be permitted only after other alternatives including land 

application, discharges to a gaining stream and connection to a regional wastewater treatment facility have been evaluated and 

determined to be unacceptable for environmental and/or economic reasons. 

Not Applicable ; 

The facility does not discharge to a Losing Stream as defined by [10 CSR 20-2.010(36)] & [10 CSR 20-7.031(1)(N)], or is an existing 

facility. 

ANTI-BACKSLIDING: 

A provision in the Federal Regulations [CWA §303(d)(4); CWA §402(c); 40 CFR Part 122.44(I)] that requires a reissued permit to be 

as stringent as the previous permit with some exceptions. 

 - All limits in this Factsheet are at least as protective as those previously established; therefore, backsliding does not apply. 

ANTIDEGRADATION:

In accordance with Missouri’s Water Quality Standard [10 CSR 20-7.031(2)], the department is to document by means of 

Antidegradation Review that the use of a water body’s available assimilative capacity is justified. Degradation is justified by 

documenting the socio-economic importance of a discharging activity after determining the necessity of the discharge. 

 - Renewal - no degradation proposed and no further review necessary. 

APPLICABLE PERMIT PARAMETERS: 

Effluent parameters contained in Factsheets and Missouri State Operating Permits are obtained from Technology Based Effluent Limit 

(TBEL), Missouri’s Effluent Regulations [10 CSR 20-7.015], Missouri’s Water Quality Standards [10 CSR 20-7.031], previous 

Missouri State Operating Permits, and from Operating Permit Applications. 
BIO-SOLIDS, SLUDGE, & SEWAGE SLUDGE: 

Bio-solids are solid materials resulting from wastewater treatment that meet federal and state criteria for beneficial uses (i.e. fertilizer). 

Sludge is any solid, semi-solid, or liquid waste generated from a municipal, commercial, or industrial wastewater treatment plant, 

water supply treatment plant, or air pollution control facility or any other such waste having similar characteristics and effect. Sewage 

sludge is solids, semi-solids, or liquid residue generated during the treatment of domestic sewage in a treatment works; including but 

not limited to, domestic septage; scum or solids removed in primary, secondary, or advanced wastewater treatment process; and a

material derived from sewage sludge. Sewage sludge does not include ash generated during the firing of sewage sludge in a sewage 

sludge incinerator or grit and screening generated during preliminary treatment of domestic sewage in a treatment works. 

Applicable (renewal and modifications to existing operating permits) ; 

This facility has been approved to land apply as per Permit Standard Conditions III and a department approved bio-solids management 

plan. 

COMPLIANCE AND ENFORCEMENT: 

Enforcement is the action taken by the Water Protection Program (WPP) to bring an entity into compliance with the Missouri Clean 

Water Law, its implementing regulations, and/or any terms and conditions of an operating permit. The primary purpose of the 

enforcement activity in the WPP is to resolve violations and return the entity to compliance. 

Not Applicable ; 

The permittee/facility is not currently under Water Protection Program enforcement action. 

PRETREATMENT PROGRAM: 

The reduction of the amount of pollutants, the elimination of pollutants, or the alteration of the nature of pollutant properties in 

wastewater prior to or in lieu of discharging or otherwise introducing such pollutants into a Publicly Owned Treatment Works [40 

CFR Part 403.3(q)]. 

Not Applicable ; 

At this time, the permittee is not required to implement and enforce a Pretreatment Program. 

REMOVAL EFFICIENCY: 

Removal efficiency is a method by which the Federal Regulations define Secondary Treatment and Equivalent to Secondary 

Treatment, which applies to Biochemical Oxygen Demand 5-day (BOD5) and Total Suspended Solids (TSS) for Publicly Owned 

Treatment Works (POTWs). Please see the United States Environmental Protection Agency’s (EPA) website for interpretation of 

percent removal requirements for National Pollutant Discharge Elimination System Permit Application Requirements for Publicly 

Owned Treatment Works and Other Treatment Works Treating Domestic Sewage @ www.epa.gov/fedrgstr/EPAWATER/1999/August/Day-04/w18866.htm

Not Applicable ; 

This wastewater treatment facility is not a POTW. Influent monitoring is not being required to determine percent removal. 

SANITARY SEWER OVERFLOWS (SSOS), AND INFLOW & INFILTRATION (I&I): 

Collection systems are a critical element in the successful performance of the wastewater treatment process. Under certain conditions, 

poorly designed, built, managed, operated, and/or maintained systems can pose risks to public health, the environment, or both. 

Causes of SSOs include, but are not limited to, the following: high levels of I&I during wet weather; blockages; structural, 

mechanical, or electrical failures; collapsed or broken sewer pipes; insufficient conveyance capacity; and vandalism. Effective and 

continuous management, operation, and maintenance, as well as ensuring adequate capacity and rehabilitation when necessary are 

critical to maintaining collection system capacity and performance while extending the life of the system. 

. Not Applicable ; 

This facility is not required to develop or implement a program for maintenance and repair of the collection system; however, it is a 

violation of Missouri State Environmental Laws and Regulations to allow untreated wastewater to discharge to waters of the state. 

SCHEDULE OF COMPLIANCE (SOC): 

A schedule of remedial measures included in a permit, including an enforceable sequence of interim requirements (actions, operations, 

or milestone events) leading to compliance with the Missouri Clean Water Law, its implementing regulations, and/or the terms and 

conditions of an operating permit. 
Not Applicable ; 

This permit does not contain a SOC. 

STORM WATER POLLUTION PREVENTION PLAN (SWPPP):

A plan to schedule activities, prohibitions of practices, maintenance procedures, and other management practices to prevent or reduce 

the pollution of waters of the state. The plan may include, but is not limited to, treatment requirements, operating procedures, and 

practices to control facility site runoff, spillage or leaks, sludge or waste disposal, or drainage from raw material storage. 

Applicable ; 

A SWPPP shall be developed and implemented for storm water outfalls and shall incorporate required practices identified by the 

department with jurisdiction, incorporate erosion control practices specific to site conditions, and provide for maintenance and 

adherence to the plan. 

.VARIANCE: 

As per the Missouri Clean Water Law § 644.061.4, variances shall be granted for such period of time and under such terms and 

conditions as shall be specified by the commission in its order. The variance may be extended by affirmative action of the 

commission. In no event shall the variance be granted for a period of time greater than is reasonably necessary for complying with the 

Missouri Clean Water Law §§644.006 to 644.141 or any standard, rule or regulation promulgated pursuant to Missouri Clean Water 

Law §§644.006 to 644.141.

Not Applicable ; 

This operating permit is not drafted under premises of a petition for variance. 

WASTELOAD ALLOCATIONS (WLA) FOR LIMITS: 

As per [10 CSR 20-2.010(78)], the amount of pollutant each discharger is allowed by the department to release into a given stream 

after the department has determined to total amount of pollutant that may be discharged into that stream without endangering its water 

quality. 

Not Applicable ;

Wasteload allocations were not calculated. 

WLA MODELING: 

Not Applicable ; 

A WLA study was either not submitted or determined not applicable by department staff. 

WHOLE EFFLUENT TOXICITY (WET) TEST:

A WET test is a quantifiable method of determining if a discharge from a facility may be causing toxicity to aquatic life by itself, in 

combination with or through synergistic responses when mixed with receiving stream water. 

Applicable ; 

In accordance with the Clean Water Act (CWA) §101(a)(3), requiring WET testing is reasonably appropriate for site-specific Missouri 

State Operating Permits for discharges to waters of the state issued under the National Pollutant Discharge Elimination System. 

Furthermore, WET testing is a means by which the department determines that [10 CSR 20-7.031(3)(D, F, & G)] are being met by the 

permitted facility. In addition to justification for the WET testing, WET tests are required under [10 CSR 20-6.010(8)(A)4] to be 

performed by specialist who are properly trained in conducting the test according to the methods prescribed by the Federal 

Government as referenced in [40 CFR Part 136]. WET test will be required by all facilities meeting the following criteria: 

 Facility is a designated Major. 

 Facility continuously or routinely exceeds its design flow. 

 Facility (industrial) that alters its production process throughout the year. 

 Facility handles large quantities of toxic substances, or substances that are toxic in large amounts. 

 Facility has Water Quality-based Effluent Limitations for toxic substances (other than NH3) 

 Facility is a municipality or domestic discharger with a Design Flow ≥ 22,500 gpd. 

 Other – please justify. 

. 

303(d) LIST & TOTAL MAXIMUM DAILY LOAD (TMDL):
Section 303(d) of the federal Clean Water Act requires that each state identify waters that are not meeting water quality standards and 

for which adequate water pollution controls have not been required. Water quality standards protect such beneficial uses of water as 

whole body contact (such as swimming), maintaining fish and other aquatic life, and providing drinking water for people, livestock 

and wildlife. The 303(d) list helps state and federal agencies keep track of waters that are impaired but not addressed by normal water 

pollution control programs. 

A TMDL is a calculation of the maximum amount of a given pollutant that a body of water can absorb before its water quality is 

affected. If a water body is determined to be impaired as listed on the 303(d) list, then a watershed management plan will be 

developed that shall include the TMDL calculation 

Applicable ; 

Missouri River is listed on the 2003 Missouri 303(d) List for PCBs and Chlordane. 

 – This facility is not considered to be a source of the above listed pollutant(s) or considered to contribute to the impairment of the 

Missouri river. 

Part V – Effluent Limits Determination

Outfall #001 – Radwaste Treatment System - SIC #4911 (Piped to Missouri River) 

Daily average flow is 0.027 MGD. 

Daily maximum flow is 0.298 MGD 

Legal Description: NE 1⁄4, NE 1⁄4, Sec. 14, T46N, R8W, Callaway 

Latitude/Longitude: +3845424/-09146462 

Receiving Stream: Missouri River (P) 

First Classified Stream and ID: Missouri River (P) (00701) 

USGS Basin & Sub-watershed No.: (10300102-28004) 

#001 EFFLUENT LIMITATIONS TABLE: 

PARAMETER UNIT

BASIS 

FOR 

LIMIT

DAILY 

MAXIMUM

WEEKLY 

AVERAGE

MONTHLY 

AVERAGE

MODIFIED

PREVIOUS 

PERMIT 

LIMITATIONS

FLOW GPD 1 * * NO SAME

BOD5 MG/L 1 * * NO SAME

TSS MG/L 1 45 30 SAME

PH SU 1 6-9 6-9 NO SAME

CHLORINE, TOTAL 

RESIDUAL 

MG/L 3 0.2 0.104 YES 190/* UG/L 

OIL & GREASE (MG/L) MG/L 1 20 15 NO SAME

BORON, TOTAL 

RECOVERABLE

MG/L 3 * * NO SAME

MONITORING FREQUENCY Please see Minimum Sampling and Reporting Frequency Requirements in the 

Derivation and Discussion Section below. 

* - Monitoring requirement only 

** -reserved 

*** - Parameter not previously established in previous state operating permit. 

N/A – Not applicable 

Basis for Limitations Codes: 

1. State or Federal Regulation/Law 7. Antidegradation Policy 

2. Water Quality Standard (includes RPA) 8. Water Quality Model 

3. Water Quality Based Effluent Limits 9. Best Professional Judgment 

4. Lagoon Policy 10. TMDL or Permit in lieu of TMDL 

5. Ammonia Policy 11. WET Test Policy 

6. Dissolved Oxygen Policy 

OUTFALL #001 – DERIVATION AND DISCUSSION OF LIMITS: 
 Flow. In accordance with [40 CFR Part 122.44(i)(1)(ii)] the volume of effluent discharged from each outfall is needed to assure 

compliance with permitted effluent limitations. If the permittee is unable to obtain effluent flow, then it is the responsibility of 

the permittee to inform the department, which may require the submittal of an operating permit modification. 

 Boron, total recoverable. Monitoring only retained from previous permit, and is deemed to be protective. 

 Biochemical Oxygen Demand (BOD5). Effluent limitations have been retained from previous state operating permit, and is 

deemed to be protective. 

 Total Suspended Solids (TSS). Limit from 40 CFR 423 .13. Effluent limitations have been retained from previous state 

operating permit and is deemed to be protective. 

 

 pH. Limit from 40 CFR 423.13. Effluent limitations have been retained from previous state operating permit, and is deemed to be 

protective, 

 Total Residual Chlorine (TRC). 40 CFR 423 also governs this analyte in addition to the calculated limits below. 

Limits have been calculated for the discharge of TRC: Warm-water Protection of Aquatic Life CCC = 10 ug/L, CMC = 19 ug/L [10 

CSR 20-7.031, Table A]. Background TRC = 0.0 ug/L. 

Chronic WLA: Ce = 10 ((0.462 + 15,250)) / 0.462 

 Ce =330,097 ug/L 

Acute WLA: Ce = 19 ((0.462 +4.62)/ 0.462, used 4.62 due to not over 10 times design flow rule 

 Ce = 209 ug/L 

LTAc = 330,097 ug/L (0.527) = 173,961 ug/L [CV = 0.6, 99th Percentile] 

LTAa = 209 ug/L (0.321) = 67.08 ug/L [CV = 0.6, 99th Percentile] 

MDL = 67.08 ug/L (3.11) =208.64 ug/L [CV = 0.6, 99th Percentile] 

AML = 67.08 ug/L (1.55) = 103.97 ug/L [CV = 0.6, 95th Percentile, n = 4] 

Total Residual Chlorine effluent limits of 0.209 mg/L daily maximum, 0.104 mg/L monthly average are recommended if 

chlorine is used as a disinfectant. Since limits at 40 CFR 423 are set below 0.209 mg/l, that limit of 0.2 mg/l will be used 

for daily. 

 Oil & Grease. Limit from 423.13. Effluent limitations have been retained from previous state operating permit, and is deemed to 

be protective. 

 Temperature. Monitoring Only 

 

 Minimum Sampling and Reporting Frequency Requirements. Sampling and reporting frequency requirements have been 

retained from previous state operating permit. 

 Outfall #001 WET Tests. WET Testing schedules and intervals are established in accordance with the department’s Permit 

Manual; Section 5.2 Effluent Limits / WET Testing for Compliance Bio-monitoring. It is recommended that WET testing be 

conducted during the period of lowest stream flow. 

 Acute 

 No less than ONCE/5 YEARS: based on the fact that this is an intermittent discharge.

Allowable Effluent Concentration % for Acute WET test = (Design flow in CFS of outfall #001 / ((7Q10 x 0.25 x 0.1) + 

(design flow in cfs of outfalls #001)) 

(0.447 cfs) / ((15,250 cfs x 0.25 x 0.1) + 0.447 cfs =0.001171 = 0.0117= 10% by default, unless diffuser is put in place. 

Outfall #002 - Cooling Tower Blowdown: (Piped to Missouri River) 
Daily average flow is 4.84 MGD. 

Daily maximum flow is 14.4 MGD. 

This outfall consists of water from the Circulating Water System, the Service Water System, and the Essential Service Water (ESW) 

System. Blowdown from the cooling tower is necessary to maintain the dissolved solids concentration in the recirculating water

system within acceptable operating limits. The ESW System is not routinely used, however water from the ESW System does mix 

with the other systems as it is periodically run to demonstrate operability. Additionally, the ESW System can be used to maintain 

proper freeboard in the ultimate heat sink pond (see Outfall #017 description) by transferring water to the Service Water System. 

Legal Description: NW 1⁄4, NW 1⁄4, Sec. 13, T46N, R8W, Callaway 

Latitude/Longitude: +3845459/-09146388 

Receiving Stream: Missouri River (P) 

First Classified Stream and ID: Missouri River (P) (00701) 

USGS Basin & Sub-watershed No.: (10300102-28004) 

#002 EFFLUENT LIMITATIONS TABLE: 

PARAMETER UNIT

BASIS 

FOR 

LIMIT

S

DAILY 

MAXIMUM

WEEKLY 

AVERAGE

MONTHLY 

AVERAGE

MODI

FIED

PREVIOUS 

PERMIT 

LIMITATIONS

FLOW GPD 1 * * NO SAME

TOTAL SUSPENDED SOLIDS MG/L 1 * * NO SAME

TOTAL DISSOLVED SOLIDS MG/L 1 * * NO SAME

PH SU 1 6-9 6-9 NO SAME

OIL & GREASE (MG/L) MG/L 9 20 15 NO SAME

SULFATE Mg/L 3 * * NO SAME

TOTAL RESIDUAL 

CHLORINE mg/L 3 0.2 0.104 YES 190/*MG/L 

MONITORING FREQUENCY Please see Minimum Sampling and Reporting Frequency Requirements in the 

Derivation and Discussion Section below. 

* - Monitoring requirement only 

** - reserved. 

*** - Parameter not previously established in previous state operating permit. 

N/A – Not applicable 

Basis for Limitations Codes: 

1. State or Federal Regulation/Law 7. Antidegradation Policy 

2. Water Quality Standard (includes RPA) 8. Water Quality Model 

3. Water Quality Based Effluent Limits 9. Best Professional Judgment 

4. Lagoon Policy 10. TMDL or Permit in lieu of TMDL 

5. Ammonia Policy 11. WET Test Policy 

6. Dissolved Oxygen Policy 

OUTFALL #002 – DERIVATION AND DISCUSSION OF LIMITS: 

 Flow. In accordance with [40 CFR Part 122.44(i)(1)(ii)] the volume of effluent discharged from each outfall is needed to assure 

compliance with permitted effluent limitations. If the permittee is unable to obtain effluent flow, then it is the responsibility of 

the permittee to inform the department, which may require the submittal of an operating permit modification. 

 Total Dissolved Solids. Limit from 423.13. Monitoring retained from previous permit, and is deemed to be protective. 

 Total Suspended Solids (TSS). Limit from 423.13. Effluent limitations have been retained from previous state operating permit, 

and is deemed to be protective. 

 pH. Limit from 423.13. Effluent limitations have been retained from previous state operating permit, and is deemed to be 

protective. 

 Oil & Grease. 40 CFR 423.13 
 Temperature. Monitoring Only 

 Total Residual Chlorine (TRC). 

 Limits have been calculated for the discharge of TRC: Warm-water Protection of Aquatic Life CCC = 10 ug/L, CMC = 19 ug/L [10 

CSR 20-7.031, Table A]. Background TRC = 0.0 ug/L. 

Chronic WLA: Ce = 10 ((22.32 + 15,250)) /22.32 

 Ce = 6842.44 ug/L 

Acute WLA: Ce = 19 ((22.32 +223.20)/ 22.32, used 22.32 due to not over 10 times design flow rule 

 Ce =209. ug/L 

LTAc = 6842 ug/L (0.527) = 3,605 ug/L [CV = 0.6, 99th Percentile] 

LTAa = 209 ug/L (0.321) = 67.08 ug/L [CV = 0.6, 99th Percentile] 

MDL = 67.08 ug/L (3.11) =208.64 ug/L [CV = 0.6, 99th Percentile] 

AML = 67.08 ug/L (1.55) = 103.97 ug/L [CV = 0.6, 95th Percentile, n = 4] 

Total Residual Chlorine effluent limits of 0.208 mg/L daily maximum, 0.104 mg/L monthly average are recommended if 

chlorine is used as a disinfectant. Since limits at 40 CFR 423 are set below 0.209 mg/l, that limit of 0.2 mg/l will be used 

for daily. 

Outfall #002 WET Tests. WET Testing schedules and intervals are established in accordance with the department’s Permit 

Manual; Section 5.2 Effluent Limits / WET Testing for Compliance Bio-monitoring. It is recommended that WET testing be 

conducted during the period of lowest stream flow. 

 Chronic 

 No less than ONCE/PERMIT CYCLE:

 Facility is designated as a Major facility or has a design flow ≥ 1.0 MGD. 

 Facility has Water Quality-based effluent limitations for toxic substances (other than NH3). 

 Acute 

 No less than ONCE/YEAR:

 Facility is designated as a Major facility or has a design flow ≥ 1.0 MGD. 

 Facility continuously or routinely exceeds their design flow. 

 Facility exceeds its design population equivalent (PE) for BOD5 whether or not its design flow is being exceeded. 

 Facility has Water Quality-based effluent limitations for toxic substances (other than NH3). 

Allowable Effluent Concentration % for Acute WET test = (Design flow in CFS of outfall #002) / ((7Q10 x 0.25 x 0.1) + 

(design flow in cfs of outfalls # 002)) 

(22.32 cfs) / ((15,250 cfs x 0.25 x 0.1) + 22.32 cfs = 0.055 = 5.5%= 10% by default unless diffuser is put in place. 

Critical Chronic Dilution (CCD) % for Chronic WET test= Design flow in CFS of outfalls #001, 002, 003, and 016 / ((7Q10 x 

0.25) + (design flow of #001, 002, 003 and 016) 

= 22.32 cfs / ((15,250cfs x 0.25) + (22.32 cfs) = 0.00573 = 0.573% = 10 % by default 

 Minimum Sampling and Reporting Frequency Requirements. Sampling and reporting frequency requirements have been 

retained from previous state operating permit. 

Outfall #003 - Water Treatment Plant Wastes (Piped to Missouri River) 
Daily average flow is 0.0 MGD. 

Daily maximum flow is 1.645 MGD. 

(These flows represent wastewater discharged to the settling basin, actual discharge will vary depending on recycle.) Outfall #003 

consists supernatant from a wastewater treatment lagoon that treats wastewater to remove solids. The wastewater that is treated in the 

lagoon is mainly from the blowdown of accumulated river solids in the water treatment plant clarifiers. The sand and carbon filter 

backwash, oil water separator and demineralizer system wastewater is also routed to this treatment lagoon. The oil water separator 

flow consists of wastewater from some plant sumps as well as flow from an oil recovery well that is being used to remediate a historic 

on-site release. Outfall #003 is normally recycled by routing it back to the head of the water treatment plant. 

Legal Description: SW 1⁄4, SW 1⁄4, Sec. 13, T46N, R8W, Callaway 

Latitude/Longitude: +3845065/-09146409 

Receiving Stream: Missouri River (P) 

First Classified Stream and ID: Missouri River (P) (00701) 

USGS Basin & Sub-watershed No.: (10300102-28004) 

 #003 EFFLUENT LIMITATIONS TABLE: 

PARAMETER UNIT

BASIS 

FOR 

LIMIT

S

DAILY 

MAXIMUM

WEEKLY 

AVERAGE

MONTHLY 

AVERAGE

MODI

FIED

PREVIOUS 

PERMIT 

LIMITATIONS

FLOW GPD 1 * * NO SAME

TOTAL SUSPENDED SOLIDS MG/L 1 100 30 NO SAME

PH SU 1 6-9 6-9 NO SAME

OIL & GREASE (MG/L) MG/L 1 20 15 NO SAME

TOTAL RESIDUAL 

CHLORINE

MG/L 1 0.2 0.104 YES 190/* UG/L 

MONITORING FREQUENCY Please see Minimum Sampling and Reporting Frequency Requirements in the 

Derivation and Discussion Section below. 

* - Monitoring requirement only 

** - # of colonies/100mL; the Monthly Average for Fecal Coliform is a geometric mean. 

*** - Parameter not previously established in previous state operating permit. 

N/A – Not applicable 

Basis for Limitations Codes: 

1. State or Federal Regulation/Law 7. Antidegradation Policy 

2. Water Quality Standard (includes RPA) 8. Water Quality Model 

3 Water Quality Based Effluent Limits 9. Best Professional Judgment 

4. Lagoon Policy 10. TMDL or Permit in lieu of TMDL 

5. Ammonia Policy 11. WET Test Policy 

6. Dissolved Oxygen Policy 

OUTFALL #003 – DERIVATION AND DISCUSSION OF LIMITS: 

 Flow. In accordance with [40 CFR Part 122.44(i)(1)(ii)] the volume of effluent discharged from each outfall is needed to assure 

compliance with permitted effluent limitations. If the permittee is unable to obtain effluent flow, then it is the responsibility of 

the permittee to inform the department, which may require the submittal of an operating permit modification. 

 Total Suspended Solids (TSS). Limit from 423.13. Effluent limitations have been retained from previous state operating permit, 

and is deemed to be protective. 

 

 pH. Limit from 423.13. Effluent limitations have been retained from previous state operating permit, and is deemed to be 

protective. 

 Total Residual Chlorine (TRC). See calculations at outfall #002 , above. 

 Oil & Grease. Limit from 40 CFR 423.13. Effluent limitations have been retained from previous state operating permit, and is 

deemed to be protective. 
 Outfall #003 WET Tests. Since this flow is recycled back to treatment headworks, no WET test is required. 

 

 Minimum Sampling and Reporting Frequency Requirements. Sampling and reporting frequency requirements have been 

retained from previous state operating permit. 

Outfall #007 – 3 Cell Flow Through Lagoon (Piped to Missouri River) 

Daily average flow is 0.0 MGD. 

Maximum flow is 0.040 MGD. 

Design Population Equivalent is 400. 

This outfall consists of a 3-cell lagoon designed to receive only sanitary and on-site cafeteria waste from the plant. Sludge will be 

stored in the lagoon. The effluent will then be discharged to a constructed wetland. Outfall #007 is normally recycled by routing it to 

the water treatment plant headworks. 

Legal Description: SW 1⁄4, SW 1⁄4, Sec. 13, T46N, R8W, Callaway 

Latitude/Longitude: +3845123/-09146318 

Receiving Stream: Missouri River (P) 

First Classified Stream and ID: Missouri River (P) (00701) 

USGS Basin & Sub-watershed No.: (10300102-28004) 

#007 EFFLUENT LIMITATIONS TABLE: 

PARAMETER UNIT

BASIS 

FOR 

LIMIT

S

DAILY 

MAXIMUM

WEEKLY 

AVERAGE

MONTHLY 

AVERAGE

MODIFIED

PREVIOUS 

PERMIT 

LIMITATIONS

FLOW GPD 1 * * NO SAME

TOTAL SUSPENDED SOLIDS MG/L 1 110 70 NO SAME

BIOLOGICAL OXYGEN 

DEMAND5 

MG/L 1 65 45 NO SAME

PH SU 1 6-9 6-9 NO SAME

OIL & GREASE (MG/L) MG/L 9 15 10 YES 20/15 

FECAL COLIFORM

#/100m

L 4 * * YES *** 

AMMONIA AS N Mg/L 11 * * YES *** 

MONITORING FREQUENCY Please see Minimum Sampling and Reporting Frequency Requirements in the 

Derivation and Discussion Section below. 

* - Monitoring requirement only 

** - # of colonies/100mL; the Monthly Average for Fecal Coliform is a geometric mean. 

*** - Parameter not previously established in previous state operating permit. 

N/A – Not applicable 

Basis for Limitations Codes: 

1. State or Federal Regulation/Law 7. Antidegradation Policy 

2. Water Quality Standard (includes RPA) 8. Water Quality Model 

3. Water Quality Based Effluent Limits 9. Best Professional Judgment 

4. Lagoon Policy 10. TMDL or Permit in lieu of TMDL 

5. Ammonia Policy 11. WET Test Policy 

6. Dissolved Oxygen Policy 

OUTFALL #007 – DERIVATION AND DISCUSSION OF LIMITS: 

 Flow. In accordance with [40 CFR Part 122.44(i)(1)(ii)] the volume of effluent discharged from each outfall is needed to assure 

compliance with permitted effluent limitations. If the permittee is unable to obtain effluent flow, then it is the responsibility of 

the permittee to inform the department, which may require the submittal of an operating permit modification. 

 Biochemical Oxygen Demand (BOD5). Effluent limitations have been retained from previous state operating permit, and is 

deemed to be protective. 
 Total Suspended Solids (TSS). Effluent limitations have been retained from previous state operating permit, and is deemed to be 

protective. 

 pH. Effluent limitations have been retained from previous state operating permit, and is deemed to be protective. 

 Fecal Coliform. Monitoring only added.

 Oil & Grease. Conventional pollutant, effluent limitation for protection of aquatic life; 10 mg/L monthly average, 15 mg/L daily 

maximum. 

 

Outfall #007 WET Tests. Since this flow is recycled back to treatment headworks, no WET test is required. 

 Minimum Sampling and Reporting Frequency Requirements. Sampling and reporting frequency requirements have been 

retained from previous state operating permit. 

Outfall #009 - Intake Heater Blowdown: (Located on Missouri River) 

Daily average flow 0 MGD. 

Daily maximum flow is 0.006 MGD. 

The river intake structure contains two recirculating electric heaters which are used to prevent ice formation on the intake bar screens 

during the winter months. Outfall #009 consists of discharges from the infrequent blowdown or drainage of these boilers. 

Legal Description: NW 1⁄4, NW 1⁄4, Sec. 5, T45N, R7W, Callaway 

Latitude/Longitude: +3842127/-09146185 

Receiving Stream: Missouri River (P) 

First Classified Stream and ID: Missouri River (P) (00701) 

USGS Basin & Sub-watershed No.: (10300102-28004) 

#009 EFFLUENT LIMITATIONS TABLE: 

PARAMETER UNIT

BASIS 

FOR 

LIMIT

S

DAILY 

MAXIMUM

WEEKLY 

AVERAGE

MONTHLY 

AVERAGE

MODI

FIED

PREVIOUS 

PERMIT 

LIMITATIONS

FLOW GPD 1 * * NO SAME

TOTAL SUSPENDED SOLIDS MG/L 1 100 30 NO 100/30 

PH SU 1 6-9 6-9 NO 6-9 

OIL & GREASE MG/L 1 20 15 NO SAME

MONITORING FREQUENCY Please see Minimum Sampling and Reporting Frequency Requirements in the 

Derivation and Discussion Section below. 

* - Monitoring requirement only 

** - # of colonies/100mL; the Monthly Average for Fecal Coliform is a geometric mean. 

*** - Parameter not previously established in previous state operating permit. 

N/A – Not applicable 

Basis for Limitations Codes: 

1. State or Federal Regulation/Law 7. Antidegradation Policy 

2. Water Quality Standard (includes RPA) 8. Water Quality Model 

3. Water Quality Based Effluent Limits 9. Best Professional Judgment 

4. Lagoon Policy 10. TMDL or Permit in lieu of TMDL 

5. Ammonia Policy 11. WET Test Policy 

6. Dissolved Oxygen Policy 

OUTFALL #009 – DERIVATION AND DISCUSSION OF LIMITS: 
 Flow. In accordance with [40 CFR Part 122.44(i)(1)(ii)] the volume of effluent discharged from each outfall is needed to assure 

compliance with permitted effluent limitations. If the permittee is unable to obtain effluent flow, then it is the responsibility of 

the permittee to inform the department, which may require the submittal of an operating permit modification. 

 Total Suspended Solids (TSS). Limit from 423.13. Effluent limitations have been retained from previous state operating 

permit, and is deemed to be protective. 

 pH. Limit from 40 CFR 423.13 Effluent limitations have been retained from previous state operating permit, and is deemed to be 

protective. 

 Oil & Grease. Limit from 40 CFR 423.13. Conventional pollutant, effluent limitation for protection of aquatic life; 

 10 monthly average, 15 mg/L daily maximum. 

 

 Minimum Sampling and Reporting Frequency Requirements. Sampling and reporting frequency requirements have been 

retained from previous state operating permit. 

Outfalls #010, #011, #012, #014, #015 and #017 - Storm Water Runoff 

For this permit cycle, Best Management Practices are being implemented. The permittee will develop a Storm Water Pollution 

Prevention Plan within 3 months of permit issuance and have it available at the site. 

Outfall #016 - Cooling Tower Bypass (Piped to Missouri River) 

Daily average flow is 3.32 MGD. 

Maximum daily flow is 14.4 MGD. 

This outfall consists of clarified river water and wastewater that has been recycled through the water treatment plant. It is used to 

moderate flow through the water treatment plant and to provide carrier water in the discharge line when discharging from Outfall 

#001. 

Legal Description: NW 1⁄4, NW 1⁄4, Sec. 13, T46N, R8W, Callaway 

Latitude/Longitude: +3846128/-09147052 

Receiving Stream: Missouri River (P) 

First Classified Stream and ID: Missouri (P) (00701) 

USGS Basin & Sub-watershed No.: (10300102-28004) 

#016 EFFLUENT LIMITATIONS TABLE: 

PARAMETER UNIT

BASIS 

FOR 

LIMIT

S

DAILY 

MAXIMUM

WEEKLY 

AVERAGE

MONTHLY 

AVERAGE

MODI

FIED

PREVIOUS 

PERMIT 

LIMITATIONS

FLOW GPD 1 * * NO SAME

TOTAL SUSPENDED SOLIDS MG/L 1 100 30 NO 100/30 

PH SU 1 6-9 6-9 NO 6-9 

OIL & GREASE MG/L 1 20 15 NO SAME

TOTAL RESIDUAL 

CHLORINE Mg/L 1 0.2 0.104 YES 190/* MG/L 

MONITORING FREQUENCY Please see Minimum Sampling and Reporting Frequency Requirements in the 

Derivation and Discussion Section below. 

* - Monitoring requirement only 

** - # of colonies/100mL; the Monthly Average for Fecal Coliform is a geometric mean. 

*** - Parameter not previously established in previous state operating permit. 

N/A – Not applicable 

Basis for Limitations Codes: 

1. State or Federal Regulation/Law 7. Antidegradation Policy 

2. Water Quality Standard (includes RPA) 8. Water Quality Model 

3. Water Quality Based Effluent Limits 9. Best Professional Judgment 

4. Lagoon Policy 10. TMDL or Permit in lieu of TMDL 
5. Ammonia Policy 11. WET Test Policy 

6. Dissolved Oxygen Policy 

OUTFALL #016 – DERIVATION AND DISCUSSION OF LIMITS: 

 Flow. In accordance with [40 CFR Part 122.44(i)(1)(ii)] the volume of effluent discharged from each outfall is needed to assure 

compliance with permitted effluent limitations. If the permittee is unable to obtain effluent flow, then it is the responsibility of 

the permittee to inform the department, which may require the submittal of an operating permit modification. 

 Total Suspended Solids (TSS). Limit from 423.13. Effluent limitations have been retained from previous state operating permit, 

and is deemed to be protective. 

 Total Residual Chlorine (TRC). See calculations at outfall #002, above. 

 pH. Limit from 423.13. Effluent limitations have been retained from previous state operating permit, and is deemed to be 

protective. 

 Oil & Grease. Limit from 423.13. Conventional pollutant, effluent limitation for protection of aquatic life; 10 mg/L monthly 

average, 15 mg/L daily maximum. 

 Temperature. Monitoring Only 

 Outfall #016 WET Tests. WET Testing schedules and intervals are established in accordance with the department’s Permit 

Manual; Section 5.2 Effluent Limits / WET Testing for Compliance Bio-monitoring. It is recommended that WET testing be 

conducted during the period of lowest stream flow. 

 Acute 

 No less than ONCE/YEAR:

 Facility is designated as a Major facility or has a design flow ≥ 1.0 MGD. 

 Facility continuously or routinely exceeds their design flow. 

 Facility exceeds its design population equivalent (PE) for BOD5 whether or not its design flow is being exceeded. 

 Facility has Water Quality-based effluent limitations for toxic substances (other than NH3). 

Allowable Effluent Concentration % for Acute WET test = (Design flow in CFS of outfall #016) / ((7Q10 x 0.25 x 0.1) + 

(design flow in cfs of outfalls # 002)) 

(22.32 cfs) / ((15,250 cfs x 0.25 x 0.1) + 22.32 cfs =0.055 = 5.5%= 10% by default unless diffuser is put in place. 

 

 Minimum Sampling and Reporting Frequency Requirements. Sampling and reporting frequency requirements have been 

retained from previous state operating permit, and is deemed to be protective. 

Part VI – Administrative Requirements

On the basis of preliminary staff review and the application of applicable standards and regulations, the Department, as administrative 

agent for the Missouri Clean Water Commission, proposes to issue a permit(s) subject to certain effluent limitations, schedules, and 

special conditions contained herein and within the operating permit. The proposed determinations are tentative pending public 

comment. 

PUBLIC NOTICE: 

As per the Missouri Clean Water Law, the Missouri Clean Water Commission, and the federal Clean Water Act, persons wishing to 

comment on Missouri State Operating Permits are directed to do so by a department approved Public Notice coversheet. This Public 

Notice coversheet is attached to a Missouri State Operating Permit during the Public Notice period. 

 

 - The Public Notice period for this operating permit was from October 3, 2008 to November 3, 2008. Responses to the Public 

Notice of this operating permit warranted the modification of the terms and conditions of this permit. Outfall #018 was eliminated and 
the analytes and WET testing in that outfall (which was an artificial composite of other outfalls) distributed to outfalls #001, #002, and 

#016. 

DATE OF FACT SHEET: AUGUST 13, 2008 

COMPLETED BY: 

TIM STALLMAN, ENVIRONMENTAL SPECIALIST

WATER PROTECTION PROGRAM

PERMITTING AND ENGINEERING SECTION

NPDES AND STORM WATER PERMITS UNIT
Part VII – Appendices 

APPENDIX # - CLASSIFICATION WORKSHEET:

ITEM POINTS POSSIBLE

POINTS 

ASSIGNED

Maximum Population Equivalent (P.E.) served (Max 

10 pts.) 

1 pt./10,000 PE or major 

fraction thereof. 0 

Maximum: 10 pt Design Flow (avg. day) or peak 

month; use greater (Max 10 pts.) 

1 pt. / MGD or major 

fraction thereof. 0 

EFFLUENT DISCHARGE RECEIVING WATER SENSITIVITY: 

Missouri or Mississippi River 0 0 

All other stream discharges except to losing streams 

and stream reaches supporting whole body contact 1 0 

Discharge to lake or reservoir outside of designated 

whole body contact recreational area 2 0 

Discharge to losing stream, or stream, lake or reservoir 

area supporting whole body contact recreation 3 0 

PRELIMINARY TREATMENT - Headworks 

Screening and/or comminution 3 0 

Grit removal 3 0 

Plant pumping of main flow (lift station at the 

headworks) 3 0 

PRIMARY TREATMENT 

Primary clarifiers 5 0 

Combined sedimentation/digestion 5 0 

Chemical addition (except chlorine, enzymes) 4 0 

REQUIRED LABORATORY CONTROL – performed by plant personnel (highest level only) 

Lab work conducted outside of plant 0 1 

Push – button or visual methods for simple test such as 

pH, Settleable solids 3 0 

Additional procedures such as DO, COD, BOD, 

titrations, solids, volatile content 5 0 

More advanced determinations such as BOD seeding 

procedures, fecal coliform, nutrients, total oils, 

phenols, etc. 

7 0 

Highly sophisticated instrumentation, such as atomic 

absorption and gas chromatograph 10 0 

ALTERNATIVE FATE OF EFFLUENT 

Direct reuse or recycle of effluent 6 0 

Land Disposal – low rate 3 0 

High rate 5 0 

Overland flow 4 0 

Total from page ONE (1) ---- 1 
APPENDIX # - CLASSIFICATION WORKSHEET (CONTINUED): 

ITEM POINTS POSSIBLE

POINTS 

ASSIGNED

VARIATION IN RAW WASTE (highest level only) (DMR exceedances and Design Flow 

exceedances) 

Variation do not exceed those normally or typically 

expected 0 0 

Recurring deviations or excessive variations of 100 to 

200 % in strength and/or flow 2 0 

Recurring deviations or excessive variations of more 

than 200 % in strength and/or flow 4 0 

Raw wastes subject to toxic waste discharge 6 0 

SECONDARY TREATMENT 

Trickling filter and other fixed film media with 

secondary clarifiers 10 0 

Activated sludge with secondary clarifiers (including 

extended aeration and oxidation ditches) 15 0 

Stabilization ponds without aeration 5 0 

Aerated lagoon 8 0 

Advanced Waste Treatment Polishing Pond 2 0 

Chemical/physical – without secondary 15 0 

Chemical/physical – following secondary 10 0 

Biological or chemical/biological 12 0 

Carbon regeneration 4 0 

DISINFECTION 

Chlorination or comparable 5 0 

Dechlorination 2 0 

On-site generation of disinfectant (except UV light) 5 0 

UV light 4 0 

SOLIDS HANDLING - SLUDGE 

Solids Handling Thickening 5 

Anaerobic digestion 10 0 

Aerobic digestion 6 0 

Evaporative sludge drying 2 0 

Mechanical dewatering 8 0 

Solids reduction (incineration, wet oxidation) 12 0 

Land application 6 0 

Total from page TWO (2) ---- 

Total from page ONE (1) --- 

Grand Total --- 1 

 - A: 71 points and greater 

 - B: 51 points – 70 points 

 - C: 26 points – 50 points 

 - D: 0 points – 25 points