PERMIT RATIONALE FOR REISSUANCE
Waste Management of Mississippi Inc, Plantation Oaks Landfill and Recycling Center, Natchez Hauling
Adams County
Sibley, Mississippi
Water NPDES Permit No. MSS057886
July 13, 2018  

I.	FACILITY INFORMATION

Facility Name:  		Waste Management of Mississippi Inc, Plantation Oaks Landfill and Recycling Center, Natchez Hauling
Facility Address:  	35 Shieldsboro Road 
	Sibley, MS  39165    
Sibley, 
Permit No.:  		MSS057886
SIC Code:  		4953
Permit Writer:  		Carter Cress
EPD Branch:  		Water II  

II.	NATURE OF BUSINESS

This facility is a non-hazardous municipal solid waste landfill.  

III.	EFFLUENT AND RECEIVING STREAM FLOW DATA

Outfall No.	Discharge Type	Total Area Drained	Receiving Stream	Current Status	
001	

Non-contact Storm Water and Groundwater 	42 acres	Unnamed Creek thence to Mills Bayou	Constructed	
002		45 acres	Unnamed Tributary thence to Walnut Creek	Constructed	
003		11 acres	Unnamed Tributary thence to Walnut Creek	Not Constructed	
004		11 acres	Unnamed Tributary thence to Walnut Creek	Not Constructed	

Outfall 001 discharges consist of storm water runoff and groundwater associated with the construction, development, and operation of the municipal landfill, except for working face runoff and leachate.  The storm water that falls in the outfall 001 drainage area is directed by facility drainage ditches to the western side of the property to Pond No. 1, which discharges via outfall 001. This water is then routed by drainage ditches to an unnamed creek thence to Mills Bayou.  

Outfall 002 discharges consist of storm water runoff and groundwater associated with the construction, development, and operation of the municipal landfill, except for working face runoff and leachate.  The storm water that falls in the outfall 002 drainage area is directed by facility drainage ditches to the southeastern side of the property to Pond No. 2, which discharges via outfall 002. This water is then routed by drainage ditches to an unnamed tributary thence to Walnut Creek.    
Outfall 003 discharges will consist of storm water runoff and groundwater associated with the construction, development, and operation of the municipal landfill, except for working face runoff and leachate.  The storm water that falls in the outfall 003 drainage area will be directed by facility drainage ditches to the southeastern side of the property to Pond No. 3, which will discharge via outfall 003. This water will then be routed by drainage ditches to an unnamed tributary thence to Walnut Creek.    

Outfall 004 discharges will consist of storm water runoff and groundwater associated with the construction, development, and operation of the municipal landfill, except for working face runoff and leachate.  The storm water that falls in the outfall 004 drainage area will be directed by facility drainage ditches to the southeastern side of the property to Pond No. 4, which will discharge via outfall 004. This water will then be routed by drainage ditches to an unnamed tributary thence to Walnut Creek.    

The facility and receiving streams are located in the South Independent Streams Basin.

IV.	TOTAL MAXIMUM DAILY LOAD (TMDL) AND 303(d) ISSUES

None; the receiving streams are not listed on the Mississippi 2016 Section 303(d) List of Impaired Water Bodies.  

V.	TYPE OF WASTEWATER TREATMENT

An individual sedimentation pond is associated with each current outfall and will also be associated with the proposed outfalls.        

VI.	EPA APPLICABLE CATEGORICAL GUIDELINES

Not applicable.  

VII.	DATA FROM APPLICATION FORM 2F

Outfall 001 

Parameter	Maximum Value	
Flow	0.368 MGD  	
Oil and Grease	< 1.9 mg/L	
Biochemical Oxygen Demand (BOD5)	< 6 mg/L	
Chemical Oxygen Demand (COD)	32 mg/L	
Total Organic Carbon (TOC)  	6.98 mg/L	
Total Suspended Solids (TSS)	35 mg/L	
Total Kjeldahl Nitrogen (TKN)	1.00 mg/L	
Nitrate plus Nitrite Nitrogen  	1.01 mg/L	
Ammonia Nitrogen	0.222 mg/L  	
Phosphorus	< 0.500 mg/L  	
Turbidity 	41.3 NTU  	
pH (minimum)	7.8 SU  	
pH (maximum)	8.4 SU	

	Outfall 002
	
Parameter	Maximum Value	
Flow	0.394 MGD  	
Oil and Grease	< 1.6 mg/L	
Biochemical Oxygen Demand (BOD5)	< 6 mg/L	
Chemical Oxygen Demand (COD)	32 mg/L	
Total Organic Carbon (TOC)  	6.56 mg/L	
Total Suspended Solids (TSS)	56 mg/L	
Total Kjeldahl Nitrogen (TKN)	1.22 mg/L	
Nitrate plus Nitrite Nitrogen  	0.926 mg/L	
Ammonia Nitrogen	0.120 mg/L  	
Phosphorus	< 0.500 mg/L  	
Turbidity 	52.8 NTU  	
pH (minimum)	8.1 SU  	
pH (maximum)	9.0 SU	

Data for the proposed outfalls 003 and 004 is considered to be representative of data for the current outfalls 001 and 002.  The anticipated flowrate for outfalls 003 and 004 is 0.0963 MGD each.    

VII.	WATER QUALITY LIMITATIONS BASED ON WASTELOAD ALLOCATION 

	Not applicable.  

IX.	CATEGORICAL GUIDELINE LIMITATIONS CALCULATIONS

Not applicable.  

X.	TOXICITY SCREENING

Not applicable.  

XI.	RECENTLY-AVAILABLE DISCHARGE MONITORING REPORT (DMR) DATA

Outfall 001 

Parameter 	Year 2013	Year 2014	Year 2015	Year 2016	Year 2017	
Average Turbidity	54.95 NTU	33.25 NTU	4.2 NTU	3.95 NTU	5.2 NTU	
Maximum Turbidity	68.6 NTU	41.3 NTU	7.2 NTU	5.1 NTU	8.8 NTU	
Average TSS	25.5 mg/L	30 mg/L	3.5 mg/L	6.5 mg/L	5 mg/L	
Maximum TSS	35 mg/L	35 mg/L	5 mg/L	13 mg/L	5 mg/L	
Minimum pH	7.8 SU	8.1 SU	8.1 SU	7.9 SU	8 SU	
Maximum pH	8.4 SU	8.4 SU	8.3 SU	8.1 SU	8.1 SU  	

Outfall 002 

Parameter 	Year 2013	Year 2014	Year 2015	Year 2016	Year 2017	
Average Turbidity	52.8 NTU	16.85 NTU	14.1 NTU	9.2 NTU	12.75 NTU	
Maximum Turbidity	52.8 NTU	29.1 NTU	15.3 NTU	13.8 NTU	23.9 NTU	
Average TSS	42 mg/L	32 mg/L	21.5 mg/L	12 mg/L	17.5 mg/L	
Maximum TSS	42 mg/L	56 mg/L	26 mg/L	14 mg/L	25 mg/L	
Minimum pH	8.5 SU	8.6 SU	8.1 SU	7.5 SU	8.7 SU	
Maximum pH	8.5 SU	9 SU	8.6 SU	8.8 SU	8.9 SU  	

XII.	PROPOSED FINAL LIMITATIONS 

1.	Average Permit Limitations

Outfall Nos.	Parameter	Categorical Limitation	Water Quality Limitation	Present Permit Limitation	Proposed Permit Limitation	Basis1	
001, 002, 003, and 004	COD	N/A	N/A	---	Report	BJ	
	TSS	N/A	N/A	Report	Report	CPL	
	Turbidity 	N/A	***	Report	Report	CPL	
	pH (minimum)	N/A	6.0 SU	6.0 SU	6.0 SU	MSWQS	

2.	Maximum Permit Limitations

Outfall Nos.	Parameter	Categorical Limitation	Water Quality Limitation	Present Permit Limitation	Proposed Permit Limitation	Basis1	
001, 002, 003, and 004	COD	N/A	N/A	---	Report	BJ  	
	TSS	N/A	N/A	90 mg/L	90 mg/L	CPL  	
	Turbidity	N/A	***	Report	Report  	CPL	
	pH 	N/A	9.0 SU  	9.0 SU	9.0 SU	MSWQS	

1 Basis: BJ = Best Judgment; CPL = Current Permit Limitation; MSWQS = Mississippi Water Quality Standard.  
***Turbidity outside the limits of a 750-foot mixing zone shall not exceed the background 
      turbidity at the time of discharge by more than 50 NTU. 
 
The parameters will be monitored once semiannually with a grab sample.  Results will be reported annually.  

COD has been added as a monitoring parameter to provide a measure of the oxygen-demanding capacity of the storm water runoff and groundwater.       

There have been several conditions added to this reissuance.  These include: 3 limitations that describe what the effluent “shall be free from”, storm event sampling records that must be kept, SWPPP certification form submittal instructions, and SWPPP development, components, controls, implementation, and amendments.  

XIII.	TJ STATEMENT: 

It is our Technical Judgment that the foregoing information is consistent with all applicable State and Federal requirements.