ADDENDUM 

Applicant: John Morrell and Company 

Permit Number: SD-0000078 

Contact Person: Mr. Cary Pieterick, Director, Environmental Affairs 

 1400 N Weber Avenue 

 Sioux Falls, SD 57103 

 (605) 338-8200 

Permit Type: Minor Industrial Facility -- Modification 

PURPOSE OF MODIFICATION 

This permit is being modified in accordance with the Administrative Rules of South 

Dakota (ARSD) §74:52:04:03. Typographical errors were discovered related to effluent 

monitoring. These errors are summarized as follows: 

• Monitoring for fecal coliform was intended to be required year-round. However, the 

permit only requires monitoring from May through September;

• Daily maximum rather than 7-day average BOD5 and total suspended solids results 

must be reported; and

• BOD5 and total suspended solids loading results (in lbs/day) must be reported.

Appropriate modifications have been incorporated into the permit. These changes all 

qualify as minor modifications, and are not subject to public notice requirements. 

ENDANGERED SPECIES 

This is a modification to the existing permit. No listed endangered species are expected 

to be impacted by activities related to this modification. 

PERMIT EXPIRATION 

The current permit expiration date of March 31, 2005, shall remain in effect. 

CONTACT 

Any questions pertaining to this modification can be directed to Lonnie Steinke, Natural 

Resources Engineer, at (605) 773-3351. 

July 5, 2000 
STATEMENT OF BASIS 

Applicant: John Morrell and Company 

Permit Number: SD-0000078 

Contact Person: Mr. Cary Pieterick, Director, Environmental Affairs 

 1400 N Weber Avenue 

 Sioux Falls, SD 57103 

 (605) 338-8200 

Permit Type: Minor Industrial Facility -- Renewal 

DESCRIPTION 

John Morrell and Company operates a meat packing facility located in Sioux Falls in 

Section 9, Township 101 North, Range 49 West (Latitude 43o 33' 55", Longitude 96o 43' 

12" - navigation-quality GPS). 

Morrell is a complex slaughterhouse with a full line of meat processing, where 

approximately 20,000 hogs are slaughtered per day. The hogs are killed, and the carcasses 

are trimmed, washed, and hung in cooling rooms where they are later processed into 

bacon, hams, and franks. The production of sausages, canning of meat, and other edible 

and inedible products are also included in the production processes. 

Skins are removed from the pigs, cured, and shipped to tanners. All other by-products are 

rendered including the blood. In addition, some outside products are brought in for 

rendering or processing. 

Morrell produces a maximum flow of 3.5 million gallons per day (MGD) during its daily 

operations. A breakdown of the wastewater production follows: 

 FLOW (MGD) 

Meat Processing Operations 

 Meat Processing 2.25 

 Cooling Water/Boiler Blowdown 0.125 

 Defrosting wastewater 0.05 

 Sanitary wastewater 0.075

 Total Meat Processing Flow - 2.5 

Rendering/Stockyard Operations 

 Rendering 0.62 

 Spray Water/Stockyard Cleanup 0.35 

 Sanitary wastewater 0.03

 Total Rendering/Stockyard Flow - 1.0 

Engine/Boiler Blowdown 0.01 

 Total Plant Flow 3.51 Total Flow 

1
The wastewater treatment facility, completed in 1983, provides tertiary treatment and 

consists of the following processes: 

Influent wastewater from two segregated wastestreams is pumped through four 

rotostrainers. One wastestream is pretreated in two dissolved air flotation tanks that 

currently operate as primary clarifiers. The two segregated wastestreams flow to a fourcell covered anaerobic lagoon system. This lagoon system removes BOD and suspended 

solids, and also acts as an equalizing basin. The five-day packing plant flow is equalized 

over a seven-day period. Lagoon effluent flows in parallel through two sets of concrete 

aeration basins. Aeration basin effluent flows to two final clarifiers, and then to four 

gravity filters for polishing. The filters can be bypassed if clarifier supernatant is of 

acceptable quality. Following filtration, the flow is directed to the 

chlorination/dechlorination system, and then aerated in the post aeration basin. Effluent is 

then pumped to the discharge structure at the Big Sioux River. 

Biosolids thickening occurs in a 50-foot diameter lagoon clarifier/thickener. Thickened 

biosolids is pumped to a belt filter press, dewatered, and disposed of in landfill facilities 

for land treatment by a contract hauler. 

In 1998, the facility installed a chemical treatment system to enhance the removal of 

grease and solids from the existing dissolved air flotation units. A new sludge press and 

building was installed to dewater recovered material from the dissolved air flotation units. 

A portion of the wastewater can be pretreated and discharged to Sioux Falls' sanitary sewer 

system. This discharge occurs following primary clarification. Between 0 to 1.2 MGD is 

typically is discharged to the Sioux Falls WWTF. 

Average design flow is 3.5 MGD, with a peak design flow of 4.2 MGD. Actual average 

daily flows are approximately 2.5 MGD. 

RECEIVING WATERS 

Any discharge from the facility will enter the Big Sioux River, which is classified by the 

South Dakota Surface Water Quality Standards (SDSWQS), Administrative Rules of South 

Dakota (ARSD), Chapters 74:51:01 and 74:51:03, for the following beneficial uses: 

(1) Domestic water supply waters; 

(5) Warmwater semipermanent fish life propagation waters; 

(7) Immersion recreation waters; 

(8) Limited contact recreation waters; 

(9) Fish and wildlife propagation, recreation, and stock watering waters; and 

(10) Irrigation waters. 

Approximately 1/8 mile below the discharge, the Big Sioux River is classified by the 

SDSWQS, ARSD, Chapters 74:51:01 and 74:51:03, for the following beneficial uses: 

(5) Warmwater semipermanent fish life propagation waters; 

2
(7) Immersion recreation waters; 

(8) Limited contact recreation waters; 

(9) Fish and wildlife propagation, recreation, and stock watering waters; and 

(10) Irrigation waters. 

ANTIDEGRADATION 

The South Dakota Department of Environment and Natural Resources (SDDENR) has 

fulfilled the antidegradation review requirements for this permit. In accordance with South 

Dakota’s Antidegradation Implementation Procedure and the SDSWQS, no further review 

is required for this discharge. The results of this review are included in Attachment B. 

SELF MONITORING DATA 

Attachment A summarizes Morrell’s effluent monitoring data. This data shows consistent 

compliance with current effluent limits. 

INSPECTIONS

The most recent “compliance evaluation” inspection was performed on June 29, 1999 by 

SDDENR. The results of this inspection were not available at the time this statement of 

basis was drafted. 

EFFLUENT LIMITS 

The permittee shall comply with the effluent limits specified below. These limits are 

based on the SDSWQS, the Best Practical Control Technology (BPT) currently available 

in 40 CFR 432.22, Total Maximum Daily Loads (TMDLs) developed for the Big Sioux 

River, and Best Professional Judgement (BPJ): 

Outfall 001 -- Any discharge from the wastewater treatment facility to the Big Sioux 

River, approximately 1/8 mile above the Big Sioux Diversion Ditch 

(Latitude 43o

 34' 00", Longitude 96o 43' 11" - navigation-quality GPS). 

1. The five-day biochemical oxygen demand shall not exceed the limits specified in 

the table below. The 30-day average limits are based on a TMDL developed for the 

Big Sioux River near Sioux Falls, and BPJ. The dissolved oxygen TMDL indicates 

that 30-day average BOD5 loadings listed in the table below (assuming a 

CBOD5/BOD5 ratio of 0.75) maintained the minimum dissolved oxygen SDSWQS of 

5.0 mg/L for each season, when combined with the proposed dissolved oxygen and 

ammonia limits. The daily maximum limits are based on BPT in 40 CFR 432.22, 

Subpart B. A total live weight kill (LWK) of 4,401,564 lbs per day was reported on 

the permit application. This value, multiplied by the values listed in 40 CFR 432.22(a) 

yields the daily maximum limits listed in the table below. 

Five-Day Biochemical Oxygen Demand Limit

3
Season 30-Day Average 

(lbs/day) 

Daily Maximum 

(lbs/day)

Spring (April - May) 1000 1849 

Summer (June - August) 667 1849 

Fall (September - October) 1000 1849 

Winter (November - March) 1000 1849 

30-day average limits were also computed using BPT values listed in 40 CFR 

432.22(a). However, the 30-day average TMDL-derived limits for BOD5 were more 

stringent, so those values were used instead. 

2. The Total Suspended Solids concentration shall not exceed 1100 lbs/day (30-day 

average) and 2200 lbs/day (daily maximum). These limits are based on BPT in 40 

CFR 432.22, Subpart B. A total live weight kill (LWK) of 4,401,564 lbs per day was 

reported on the permit application (1998-99 records). This value, multiplied by the 

values listed in 40 CFR 432.22(a) yields the proposed limits. 

3. The pH shall not be less than 6.5 units nor greater than 9.0 units in any single 

analysis and/or measurement. These limits are based on the warmwater 

semipermanent fish life propagation waters classification of the Big Sioux River, 

and the SDSWQS (ARSD §74:51:01:48). The BPT limits in 40 CFR 432.22, 

Subpart B (6.0 to 9.0) were also considered in developing the limits for pH, but were 

less stringent than the proposed water quality-based limits. 

pH shall be taken within 15 minutes of sample collection with a pH meter. The pH 

meter must be capable of simultaneous calibration to two points on the pH scale 

that bracket the expected pH and are approximately three standard units apart. The 

pH meter must read to 0.01 standard units and be equipped with temperature 

compensation adjustment. 

4. Fecal coliform organisms from May 1 to September 30 may not exceed a 

concentration of 200 per 100 milliliters as a geometric mean based on a minimum 

of five samples obtained during separate 24-hour periods for any 30-day period, 

and they may not exceed this value in more than 20 percent of the samples 

examined in this 30-day period. Fecal coliform organisms may not exceed 400 per 

100 milliliters in any one sample. This limit shall apply year-round. These limits 

are based on the immersion recreation waters classification of the Big Sioux River, 

the SDSWQS (ARSD §74:51:01:50), and BPT limits in 40 CFR 432.22, Subpart B. 

5. The oil and grease concentration shall not exceed 10 mg/L (daily maximum) or 

impart a visible film or sheen to the surface of the water or to the adjoining 

shorelines. The oil and grease loading shall not exceed 352 lbs/day as a 30-day 

average limit. The daily maximum limits are based on the fish and wildlife 

6. propagation, recreation, and stock watering waters classification of the Big Sioux 

River and the SDSWQS (ARSD §§74:51:01:52 and 74:51:01:10). The 30-day 

4
average limit is based on BPT in 40 CFR 432.22, Subpart B. A total live weight kill 

(LWK) of 4,401,564 lbs per day was reported on the permit application. This value, 

multiplied by the value listed in 40 CFR 432.22(a) yields the 30-day average limit. 40 

CFR 432.22, Subpart B also contains a daily maximum mass loading limit. However, 

the proposed 10 mg/L daily maximum water quality-based limit is far more stringent 

than the BPT daily maximum limit. Therefore, only the daily maximum water qualitybased limit and 30-day average BPT-based limits are being applied. 

7. The minimum dissolved oxygen shall not fall below the values specified in the 

following table. These limits are based on the SDSWQS and a TMDL developed 

in accordance with section 303(d) of the federal Clean Water Act, and BPJ. The 

TMDL relies on EPA’s STREAMDO IV model, the surface water quality standard 

for dissolved oxygen of 5.0 mg/L, and BPJ. See the TMDL for Ammonia and 

Dissolved Oxygen in the Big Sioux River near Sioux Falls, 1999 for more detail. 

The summer and fall seasonal limits are based on the wasteload allocation (WLA) 

as determined in the TMDL. The TMDL indicates that a WLA of 0.0 mg/L would 

be protective of the SDSWQS for the spring season. However, a limit of 5.0 mg/L 

is being proposed for all seasons, based on BPJ and the SDSWQS for dissolved 

oxygen of 5.0 mg/L for waters classified for warmwater semipermanent fish life 

propagation (ARSD §74:51:01:48).

Dissolved Oxygen Limits 

Season Instantaneous Minimum 

(mg/L)

Spring (April - May) 5.0 

Summer (June – August) 5.0 

Fall (September – October) 5.0 

Winter (November – March) 5.0 

For the winter season, the proposed limit for dissolved oxygen is less stringent than 

the current permit limit. However, backsliding is allowed in this case, per 

§402(o)(1) and §303(d)(4) of the federal Clean Water Act, as the Big Sioux River 

is currently meeting SDSWQS for dissolved oxygen, and the proposed limit 

ensures that SDSWQS for dissolved oxygen will continue to be maintained. In 

addition, the change is not prohibited by South Dakota’s Antidegradation 

Implementation Procedure, 1999. 

8. The ammonia-nitrogen concentration shall not exceed the limits specified in the 

table below. These limits are based on a TMDL developed in accordance with 

section 303(d) of the federal Clean Water Act, and the SDSWQS. The TMDL is 

based on the background water quality of the Big Sioux River near Sioux Falls, the 

surface water quality standard for un-ionized ammonia of 0.04 mg/L, and BPJ. See 

the TMDL for Ammonia and Dissolved Oxygen in the Big Sioux River near Sioux 

Falls, 1999 for more detail. The 0.04 mg/L instream standard for un-ionized 

ammonia is based on the warmwater semipermanent fish life propagation waters 

classification of the Big Sioux River and the SDSWQS (ARSD §74:51:01:48). 

5
The TMDL contains seasonal computations of an ammonia wasteload allocation, to 

be allocated among point sources. Morrell’s 30-day average ammonia limits are 

based on their allocation of the allowable wasteload. The daily maximum limits 

were determined by multiplying the 30-day average limits by 1.75, in accordance 

with the SDSWQS and ARSD §74:51:01:48. 

Total Ammonia Limits (as N)

Season 30-Day Average 

(lbs/day) 

Daily Maximum 

(lbs/day)

Spring (April - May) 70 123 

Summer (June - August) 58 102 

Fall (September - October) 75 131 

Winter (November - March) 163 285 

For the winter season, the proposed limit for ammonia is less stringent than the 

current permit limit. However, backsliding is allowed in this case, per §402(o)(1) 

and §303(d)(4) of the federal Clean Water Act, as the Big Sioux River is currently 

meeting SDSWQS for ammonia, and the proposed limit ensures that SDSWQS for 

ammonia will continue to be maintained. In addition, the change is not prohibited 

by South Dakota’s Antidegradation Implementation Procedure, 1999. 

 SDDENR considers the analytical detection limit for ammonia to be 0.01 mg/L. If 

the effluent ammonia concentration is less than the analytical detection limit, "0" 

shall be used for reporting and averaging purposes. 

9. The total residual chlorine concentration shall not exceed 0.019 mg/L. This limit is 

based on the warmwater semipermanent fish life propagation waters classification 

of the Big Sioux River and the SDSWQS (ARSD §74:51:01:48). 

 SDDENR considers the analytical detection limit for total residual chlorine to be 0.05 

mg/L. If the effluent total residual chlorine concentration is less than the analytical 

detection limit, "0" shall be used for reporting purposes. Total residual chlorine 

measurements below 0.05 mg/L shall not be considered violations of the total residual 

chlorine limit. 

 

10. There shall be no Chronic Toxicity, as measured by the Whole Effluent Toxicity 

test. This limit is based on the USEPA-Region VIII WET policy for South Dakota 

and BPJ. 

Temperature, nitrates, CBOD5, and flow shall be monitored, but will not have limits. 

These parameters shall be monitored to aid in the development of future Total Maximum 

Daily Loads. 

The Big Sioux River is classified as a drinking water supply at the point where Morrell’s 

discharge enters the river. Therefore, SDSWQS for total coliform apply to this portion of 

6
the Big Sioux River. However, this classification is “removed” 1/8 mile downstream, and 

the SDSWQS for total coliform no longer applies. Since this 1/8 mile portion of the river 

is not actually being used as a drinking water source, no effluent limits or monitoring for 

total coliform are being required in the permit. 

SELF MONITORING REQUIREMENTS 

As a minimum, upon the effective date of this permit, the following parameters shall be 

monitored at the frequency and with the type of measurement indicated; samples or 

measurements shall be representative of the volume and nature of the discharge. 

Effluent Characteristic Frequency Reporting Values 1 Sample Type

Rate of Discharge, MGD Continuous daily maximum; 

30-day average 

Instantaneous 

Oil and Grease, mg/L Daily 

presence or absence 

of sheen; daily 

maximum 

Visual/Grab 2

Oil and Grease, mg/L Weekly daily maximum Grab 2

Oil and Grease, lbs/day 8 Monthly 30-day average Calculated 

pH, standard units 7 Daily daily minimum; 

daily maximum 

Instantaneous 3

Total Residual Chlorine, mg/L 

(Required only if the effluent is 

chlorinated) 

Daily daily maximum 4 Grab 

Dissolved Oxygen, mg/L Five times per week daily minimum Grab 

Five-Day Biochemical Oxygen 

Demand, mg/L Five times per week 7-day average; 

30-day average Composite 

Total Suspended Solids, mg/L Five times per week 7-day average; 

30-day average Composite 

 

1

 See definitions, Part I.A. of permit. 

2

 The presence or absence of an oil sheen shall be visually monitored. In the event that an oil sheen or 

floating oil is observed during discharge, grab samples shall be taken immediately, analyzed and reported. 

At a minimum, a sample shall be taken and analyzed weekly for oil and grease. 

3

 pH is to be taken within 15 minutes of sample collection with a pH meter. The pH meter must be capable of 

simultaneous calibration to two points on the pH scale that bracket the expected pH and are approximately 

three standard units apart. The pH meter must read to 0.01 standard units and be equipped with temperature 

compensation adjustment. 

4

 SDDENR considers the analytical detection limit for total residual chlorine to be 0.05 mg/L and for 

ammonia to be 0.01 mg/L. If the effluent value is less than the analytical detection limit, "0" shall be used 

for reporting and averaging purposes. 

7
Reporting Values 1 Effluent Characteristic Frequency Sample Type

Fecal Coliform, no./l00 mL Five times per week 5

daily maximum; 

30-day geometric 

mean 

Grab 

Water Temperature, oC 7 Five Times per week daily maximum; 

30-day average 

Instantaneous 6

Ammonia-Nitrogen, mg/L (as N) 7 Three times per week daily maximum; 4

30-day average Composite 

Ammonia-Nitrogen, lbs/day (as N) 8 As sample results are 

received 

daily maximum; 

30-day average 

Calculated 

Nitrates, mg/L (as N) Monthly daily maximum; 

30-day average 

Grab or 

Composite 

Five-Day Carbonaceous Biochemical 

Oxygen Demand (CBOD5), mg/L Monthly daily maximum; 

30-day average 

Grab or 

Composite 

Chronic Whole Effluent Toxicity Quarterly 9 see Part I.C.3 Grab 

 

5

 For fecal coliform, all samples collected in a 30-day period shall be used in determining the geometric 

mean. The sampling protocol for fecal coliform only applies if the discharge occurs between May 1 and 

September 30.

6

 The water temperature of the effluent shall be taken as a field measurement at the time of sampling. 

Measurement shall be made with a mercury-filled, or dial type thermometer, or a thermistor. Readings shall 

be reported to the nearest whole degree Celsius. 

7

 The pH and temperature of the effluent shall be determined during when ammonia samples are collected. 

8

 Daily loading (lbs/day) shall be calculated by multiplying the discharge flow rate (million gallons per day) 

by the measured pollutant concentration (mg/L) times 8.34 (a conversion factor). 30-day average loading 

(lbs/day) shall be calculated by averaging the computed daily loadings (lbs/day). 

9

 The permittee shall obtain and analyze a valid chronic whole effluent toxicity sample at least once during 

each calendar quarter. 

All samples collected and analyzed using approved analytical methods, during the 7-day or 

30-day period, are to be used in determining the averages. If only one sample is collected 

during the period, it must be considered the same as the average for that period. The 

permittee always has the option of collecting additional samples if appropriate. Discharge 

Monitoring Report Forms (DMRs) must be signed by the principal executive officer and 

submitted to SDDENR and EPA monthly. 

Monitoring shall consist of inspections of the wastewater treatment facility daily to 

determine if proper operation and maintenance procedures are being undertaken. 

Documentation of each of these visits shall be maintained to be reviewed by SDDENR or 

EPA personnel when an inspection occurs. 

8
WHOLE EFFLUENT TOXICITY TESTING 

Effective immediately, the permittee shall sample and test for Chronic Whole Effluent 

Toxicity (WET) on a quarterly basis, using Ceriodaphnia and fathead minnows as test species. 

The permittee may request to alternate test species each quarter. 

There shall be no chronic toxicity as measured by the 25% inhibition concentration (IC25) 

calculated on the basis of test organism survival and growth or survival and reproduction. A 

multi-dilution test consisting of five concentrations and a control is required for the chronic 

test. Chronic toxicity occurs when the IC25 is less than or equal to the values in the table 

below. These dilutions are based on the seasonal receiving water low flow dilution ratio, 

USEPA-Region VIII WET policy for South Dakota, and BPJ. 

Chronic Whole Effluent Toxicity Testing Summary 

Season Chronic WET Test IC25

Spring (Apr - May) 36% 

Summer (Jun – Aug) 36% 

Fall (Sep – Oct) 48% 

Winter (Nov - Mar) 47% 

The IC25 is computed using the following equation: 

adjusted 7 Q5

Morrell' equalizeds design t flow effluen IC 25 Concentrat = ion

The values for the adjusted 7Q5 were obtained from the Total Maximum Daily Load 

developed for the Big Sioux River near Sioux Falls. This value takes into account SDDENR’s 

Mixing Zone and Dilution Procedures, and includes the flow from the permittee’s discharge. 

The current permit contains monitoring requirements for only single-dilution chronic 

whole effluent toxicity tests. Due to changes in the USEPA-Region VIII WET policy for 

South Dakota, chronic toxicity testing is being changed to require multi-dilution tests. 

Morrells has requested that lab water, rather than receiving water, be allowed for dilution 

water. This request was granted, and may be continued in the proposed permit. 

ENDANGERED SPECIES 

This is a renewal of an existing permit. No listed endangered species are expected to be 

impacted by activities related to this permit.

9
PERMIT EXPIRATION 

A five-year permit is recommended. 

PERMIT CONTACT 

Any questions pertaining to this Statement of Basis can be directed to Lonnie Steinke, 

Natural Resources Engineer at (605) 773-3351. 

February 8, 2000

10
Attachment A 

DMR Data for John Morrell and Company

A-1
Copies of Discharge Monitoring Report Summary Data 

are Available Upon Request

A-2
Attachment B 

40 CFR 432 

Effluent Guidelines and Standards for the 

Meat Products Point Source Category 

B-1
Attachment C 

Antidegradation Review 

C-1
Permit Type: Major Industrial Applicant: John Morrell and Company 

Date Received: 09/25/98 Permit #: SD-0000078 

County: Minnehaha Legal Description: S9 T101N R49W 

Receiving Stream: Big Sioux River Classification: 1 5 7 8 9 10 

If the discharge affects a downstream waterbody with a higher use classification, list its 

name and uses: N/A 

APPLICABILITY 

1. Is the permit or the stream segment exempt from the antidegradation review process under ARSD 

74:51:01? Yes No If no, go to question #2. If yes, check those reasons why the review is not 

required: 

Existing facility covered under a surface water discharge permit is operating at or below design flows 

and pollutant loadings; 

*Existing effluent quality from a surface water discharge permitted facility is in compliance with all 

discharge permit limits; 

*Existing surface water discharge permittee was discharging to the current stream segment prior to 

March 27, 1973, and the quality and quantity of the discharge has not degraded the water quality of 

that segment as it existed on March 27, 1973; 

*The existing surface water discharge permittee, with DENR approval, has upgraded or built new 

wastewater treatment facilities between March 27, 1973, and July 1, 1988; 

The existing surface water discharge permittee discharges to a receiving water assigned only the 

beneficial uses of (9) and (10); the discharge is not expected to contain toxic pollutants in 

concentrations that may cause an impact to the receiving stream; and DENR has documented that the 

stream cannot attain a higher use classification. This exemption does not apply to discharges that may 

cause impacts to downstream segments that are of higher quality; 

Receiving water meets Tier 1 waters criteria. Any permitted discharge must meet water quality 

standards; or 

The permitted discharge will be authorized by a Section 404 Corps of Engineers Permit, will undergo 

a similar review process in the issuance of that permit, and will be issued a 401 certification by the 

department, indicating compliance with the state’s antidegradation provisions. 

 

 *An antidegradation review is not required where the proposal is to maintain or improve the 

existing effluent levels and conditions. Proposals for increased effluent levels, in these categories of 

activities are subject to review. 

No further review required. 

C-2
ANTIDEGRADATION REVIEW SUMMARY

2. The outcome of the review is: 

A formal antidegradation review was not required for reasons stated in this worksheet. Any 

permitted discharge must ensure water quality standards will not be violated. 

The review has determined that degradation of water quality should not be allowed. Any 

permitted discharge would have to meet effluent limits or conditions that would not result in 

any degradation estimated through appropriate modeling techniques based on ambient water 

quality in the receiving stream, or pursue an alternative to discharging to the waterbody. 

The review has determined that the discharge will cause an insignificant change in water 

quality in the receiving stream. The appropriate agency may proceed with permit issuance 

with the appropriate conditions to ensure water quality standards are met. 

The review has determined, with public input, that the permitted discharge is allowed to 

discharge effluent at concentrations determined through a total maximum daily load (TMDL). 

The TMDL will determine the appropriate effluent limits based on the upstream ambient water 

quality and the water quality standard(s) of the receiving stream. 

The review has determined that the discharge is allowed. However, the full assimilative 

capacity of the receiving stream cannot be used in developing the permit effluent limits or 

conditions. In this case, a TMDL must be completed based on the upstream ambient water 

quality and the assimilative capacity allowed by the antidegradation review. 

Other: 

3. Describe any other requirements to implement antidegradation or any special conditions 

that are required as a result of this antidegradation review: 

 

Lonnie Steinke, Natural Resources Engineer 7/01/99 

Reviewer Date 

Kelli Buscher, P.E., Natural Resources Engineer 7/01/99 

Program Supervisor or Team Leader Date 

C-3