2443 PER20 10 0001 1 PERMIT RATIONALE FOR REISSUANCE

Tyson Foods, Inc. , Carthage Processing Plant

Leake County

Carthage, Mississippi

Water NPDES No. MS0026140

September 2 9 , 2010

I. FACILITY INFORMATION

Facility Name: Tyson Foods, Inc., Carthage Processing Plant

Facility Addre ss: 3865 Highway 35 North

Carthage, MS 39051

Permit No.: MS0026140

SIC: 2015

Permit Writer: Becky Williams

EPD Branch: A gricultural Branch

II. NATURE OF BUSINESS

Poultry processing, packaging, and shipping of 525,000 birds/day.

III. EFFL UENT AND RECEIVING STREAM FLOW DATA

Outfall 001 discharge s 2.137 MGD (long term average) and 4.146 MGD (30

- day max. flow and max.

flow) of process wastewater, sanitary wastewate r and non

- contact cooling water to Pickens Creek

thence into Cobbs Creek

.

IV. 303 (d) AND TMDL ISSUES

This discharge is included in the “Pearl River and Yockanookany River (Phase I) TMDL for Mercury

(Approved: Feb 2004)”. The TMDL recommends mercury monitoring for this discharge.

A TMDL for pathogens and a TMDL for pH have also been completed.

V. TYPE OF WASTEWATER TREATMENT:

Screening, anaerobic lagoons, activated sludge, sedimentation, disinfection, and dechlorination.

VI. EPA APPLICABLE CATEGORICAL GUIDELINES AND LIMITATIONS

40 CFR 432

- Meat and Poultry Products Point Source Categor y. Subpart K

– Poultry First

Processing (432.112 and 432.113. Subpart L

– Poultry Further Processing (432.122 and 432.123).

Subpart K

– 432.112 (BPT) & Subpart L

– 432.122 (BPT)

Parameter Maximum Monthly Average Daily Maximum

Ammonia (as N) 4.0 mg/L 8.0 mg/L

BOD 5 16 mg/L 26 mg/L

Fecal Coliform N/A 400 col./100 mL

O&G (as HEM) 8.0 mg/L 14 mg/L

TSS 20 mg/L 30 mg/L2443 PER20 10 0001 2

Subpart L

– 432.113 (BAT) & Subpart L

– 432.123 (BAT)

Parameter Maximum Monthly Average Daily Maximum

Ammon ia (as N) 4.0 mg/L 8.0 mg/L

Total Nitrogen 103 mg/L 147 mg/L

VII. DATA FROM APPLICATION FORM 2C

Parameter Maximum Daily Value

BOD 5 7.6 mg/L

COD 40 mg/L

TOC 6.2 mg/L

TSS 14 mg/L

NH 3

- N 1.1 mg/L

Oil & Grease 7.2 mg/L

pH 8.0 S.U.

Fecal Colifor m Bacteria 240 col./100 mL

Temperature (Summer) 15 .5 o C

Temperature (Winter) 34.2 o C

Flow 2.137 MGD (long term average)

Total Residual Chlorine 0.05 mg/L

Nitrate/Nitrite (as N) 86 mg/L

Total Organic Nitrogen 87.7 mg/L

Total Phosphorus 14 mg/L

Tot al Copper 0.03 mg/L (max)

– 0.0 0 3 mg/L (avg.

- 24 samples)

Total Mercury 0.00000195 mg/L = 1.95 ng/L (1 sample)

Total Zinc 0.34 mg/L (max)

– 0.033 mg/L (avg.

- 24 samples)

VIII. WATER QUALITY LIMITATIONS BASED ON WASTELOAD ALLOCATION

Parameter Avera ge

CBOD 5 16 mg/L

NH 3

- N 2 mg/L

Minimum D.O. 6.0 (min) mg/L

Fecal Coliform (Summer) 200 col./100 mL

Fecal Coliform (Winter) 2,000 col./100 mL

TRC 0.011 mg/L

pH 6.0 (min)

– 9.0 (max) S.U.

Flow 2.571 MGD

IX. TOXICITY SCREENING

IWC

= Instream Wastewate r concentration

Q

w = maximum 30 day average wastewater flow, if available

Q

r = receiving stream flow

X

w = historical effluent data

X

wa = permit limits from previous permit or from effluent guidelines

X

ta = the calculated instream concentration based on exi sting permit limits or the calculated

limit based on current effluent guidelines

X

t = the calculated instream concentration based on historical effluent data from

application

X

r = receiving stream concentration

Q

w = 4.146 MGD

Q

r = 0.0646 MGD2443 PER20 10 0001 3

I WC = 100* Q

w = 100 * 4.14 6

= 98 %

Q

r +Q

w 0.0646 + 4.146

Total Copper X

w = 0.003

X

t = (Q

r * X

r ) + (Q

w * X

w )

= (0.0646 * 0) + ( 4.146 * 0.0 03 )

= 0.0 0295 mg/L

Q

r +Q

w 0.0646 + 4.146

Total Zinc X

w = 0.033

X

t = (Q

r * X

r ) + (Q

w * X

w )

= (0.0646 * 0) + ( 4.146 * 0. 033 )

= 0. 0325 mg/L

Q

r +Q

w 0.0646 + 4.146

Acute Screening

Parameter X

t (mg/L) AWQC (mg/L) Pass/Fail

Total Copper 0.0 0295 0.007 Pass

Total Zinc 0. 0325 0.065 Pass

Chronic Sc reening

Parameter X

t (mg/L) CWQC (mg/L) Pass/Fail

Total Copper 0.0 0295 0.005 Pass

Total Zinc 0. 0325 0.065 Pass

X

. PROPOSED FINAL LIMITATIONS

1. Average Permit Limitations

Parameter Categorical

Limitation Water Quality

Limitation Present Permit

Li mitation Proposed Permit

Limitation Basis

BOD 5 16 mg/L N/A 16 mg/L 16 mg/L Categorical

CBOD 5 N/A 16 mg/L N/A Report mg/L MSWQS

TSS 20 mg/L N/A 20 mg/L 20 mg/L Categorical

NH 3

- N 4.0 mg/L 2.0 mg/L 2.0 mg/L 2.0 mg/L MSWQS

Oil & Grease 8.0 mg/L N/A 8.0 mg /L 8.0 mg/L Categorical

TRC N/A 0.011 mg/L 0.011 mg/L 0.011 mg/L MSWQS

Fecal (Summer) N/A 200 col./100 mL 200 col./100 mL 200 col./100 mL MSWQS

Fecal (Winter) N/A 2,000 col./100 mL Report col./100 mL Report col./100 mL 1/

D.O. (min.) N/A 6.0 mg/L 6.0 m g/L 6.0 mg/L MSWQS

pH (min.) N/A 6.0 S.U. 6.0 S.U. 6.0 S.U. MSWQS

Mercury N/A Report mg/L Report mg/L Report mg/L MSWQS

Total Nitrogen 103 mg/L N/A 103 mg/L 103 mg/L Categorical

Nitrate/Nitrite N/A N/A Report mg/L Report mg/L 2/

TKN N/A N/A Report mg/ L Report mg/L 2/2443 PER20050001 4

2. Maximum Permit Limitations

Parameter Categorical

Limitation Water Quality

Limitation Present Permit

Limitation Proposed Permit

Limitation Basis

BOD 5 26 mg/L N/A 26 mg/L 26 mg/L Categorical

CBOD 5 N/A 24 mg/L N/A Report mg/L MS WQS

TSS 30 mg/L N/A 30 mg/L 30 mg/L Categorical

NH 3

- N 8.0 mg/L 3.0 mg/L 3.0 mg/L 3.0 mg/L MSWQS

Oil & Grease 14 mg/L N/A 14 mg/L 14 mg/L Categorical

TRC N/A 0.019 mg/L 0.019 mg/L 0.019 mg/L MSWQS

Fecal (Summer) N/A 400 col./100 mL 400 col./100 mL 400 col./100 mL Categorical

Fecal (Winter) 400 col./100 mL 4,000 col./100 mL 400 col./100 mL 400 col./100 mL Categorical

pH N/A 9.0 S.U. 9.0 S.U. 9.0 S.U. MSWQS

Mercury N/A Report mg/L Report mg/L Report mg/L MSWQS

Total Nitrogen 147 mg/L N/A 147 mg/L 147 mg/L Categorical

Nitrate/Nitrite N/A N/A Report mg/L Report mg/L 2/

TKN N/A N/A Report mg/L Report mg/L 2/

Carbonaceous Biochemical Oxygen Demand (5

- Day), Biochemical Oxygen Demand (5

- Day), Total

Suspended Solids, Ammonia as Nitrogen, Oil and Grease, Fecal Coliform Bacteria , Total Residual Chlorine,

Dissolved Oxygen, and pH shall be monitored twice per month with a grab sample of the effluent. Mercury

shall be monitored once per year with a grab sample of the effluent . Flow shall be measured continuo usly

using a recorder.

1/ Fecal coliform is limited to a maximum of 400 col./100 mL therefore the winter average cannot be

limited to 2,000 col./100 mL. The winter average fecal shall be limited to report.

2/ There is no test method to monitor total nitrogen. Total Nitrogen is the total of nitrate/nitrite and total

kjeldahl nitrogen. Nitrate/nitrite nitrogen and total kjeldahl nitrogen must be monitored and the

results added together to obtain a value for total nitrogen.

XI. BPT AND BAT STATEMENT:

The f oregoing limitations represent BPT & BAT.