PERMIT RATIONALE FOR REISSUANCE
Waste Management of Mississippi Inc, Pecan Grove Landfill and Recycling Center
Harrison County
Pass Christian, Mississippi
Water NPDES No. MSS057843
February 16, 2012

I.	FACILITY INFORMATION

Facility Name:  Waste Management of Mississippi Inc, Pecan Grove Landfill and Recycling Center and Rubbish Site
Facility Address:  9685 Firetower Road 
Pass Christian, MS  39165    
Pass Christian, 
Permit No.:  MSS057843
SIC:  4953
Permit Writer:  Michelle Vinson
EPD Branch:  Mining and Solid Waste Management Branch

II.	NATURE OF BUSINESS

The Pecan Grove Landfill and Recycling Center is a municipal solid waste disposal facility.  A permitted Class I rubbish site is also located at the facility.

III.	EFFLUENT AND RECEIVING STREAM FLOW DATA

The initial application received on May 18, 2011 included the existing outfalls Outfall 001 and Outfall 002 for the discharge of non-contact storm water and proposed the addition of two new outfalls.  Proposed Outfall 003 would be used as an emergency discharge point for non-contact storm water collected from the Class I rubbish site.  The Class I rubbish site is not currently operated and has not begun construction of any disposal cells.  Proposed Outfall 101 would be an internal discharge point for treated leachate to be discharged into south storm water sedimentation basin to be ultimately mixed with non-contact storm water and discharged into an unnamed tributary of DeLisle Bayou.  However, pursuant to notification received on January 26, 2012 from Waste Management representatives, the proposed on-site treatment and discharge of leachate has been subsequently withdrawn by Waste Management prior to the Department evaluating the proposed discharge.

Outfalls 001 and 003, existing and proposed respectively, will discharge to an unnamed tributary of DeLisle Bayou.  The unnamed tributary is not included in the 2010 303(d) of impaired waterbodies and a Total Maximum Daily Load (TMDL) has not been developed for the parameters of concern for the receiving stream.  The unnamed tributary and Delisle Bayou are designated as Fish and Wildlife.

Outfall 002 will discharge to an unnamed tributary of the Wolfe River.  The unnamed tributary of Wolfe River is not included in the 2010 303(d) list of impaired waterbodies.  A TMDL for pathogens has been developed for Wolf River, but pathogens are not a parameter of concern for the proposed discharge.  The unnamed tributary to Wolfe River is designated as Fish and Wildlife.  The Wolfe River is designated as Recreation from MS Highway 26 to the St. Louis Bay.  

IV.	303(d) ISSUES

As discussed in Section III above, there are no 303(d) concerns for the existing and proposed discharges.

V.	TYPE OF WASTEWATER TREATMENT:

Sedimentation basins will be used to allow settling of suspended solids prior to discharge of non-contact storm water to the receiving streams.

VI.	EPA APPLICABLE CATEGORICAL GUIDELINES

None.

VII.	DATA FROM APPLICATION FORM 2F

Outfall	
Parameter	Maximum Daily Value	
Unit	
001	Oil and Grease	<2.0	mg/L	
	Biological Oxygen Demand	12.3	mg/L	
	Chemical Oxygen Demand	53	mg/L	
	Total Suspended Solids	428	mg/L	
	Total Nitrogen	3.81	mg/L	
	Total Phosphorus	< 0.025	mg/L	
	pH	4.55 to 11	SU	
	Turbidity	38	NTU	
002	Oil and Grease	<2.0	mg/L	
	Biological Oxygen Demand	4.5	mg/L	
	Chemical Oxygen Demand	34	mg/L	
	Total Suspended Solids	63	mg/L	
	Total Nitrogen	0.76	mg/L	
	Total Phosphorus	<0.025	mg/L	
	pH	4.87 to 6.0	SU	
	Turbidity	18	NTU	
003*	Oil and Grease	<2.0	mg/L	
	Biological Oxygen Demand	12.3	mg/L	
	Chemical Oxygen Demand	53	mg/L	
	Total Suspended Solids	428	mg/L	
	Total Nitrogen	3.81	mg/L	
	Total Phosphorus	<0.025	mg/L	
	pH	4.55 to 11	SU	
	Turbidity	38	NTU	
* The analytical values provided for the proposed Outfall 003 were obtained from the data related to Outfall 001.

VIII. 	WATER QUALITY LIMITATIONS BASED ON WASTELOAD ALLOCATION 

	None.

IX.	CATEGORICAL GUIDELINE LIMITATIONS CALCULATIONS

Not applicable.

X.	TOXICITY SCREENING

Not applicable.

XI.	PROPOSED FINAL LIMITATIONS 

1.	Average Permit Limitations

Outfall	Parameter	Categorical Limitation	Water Quality Limitation	Present Permit Limitation	Proposed Permit Limitation	Basis	
MSS057843-001	pH	None	None	6.0 SU (min)	6.0 SU (min)	Rationale	
	TSS*	None	None	Report	Report (mg/L)	Rationale	
	Turbidity	None	None	Report	Report (NTU)	Rationale	
MSS057843-002	pH	None	None	6.0 SU (min)	6.0 SU (min)	Rationale	
	TSS*	None	None	Report	Report (mg/L)	Rationale	
	Turbidity	None	None	Report	Report (NTU)	Rationale	
MSS057843-003	pH	None	None	6.0 SU (min)	6.0 SU (min)	Rationale	
	TSS*	None	None	Report	Report (mg/L)	Rationale	
	Turbidity	None	None	Report	Report (NTU)	Rationale	

2.	Maximum Permit Limitations

Outfall	Parameter	Categorical Limitation	Water Quality Limitation	Present Permit Limitation	Proposed Permit Limitation	Basis	
MSS057843-001	pH	None	None	9.0 SU	9.0 SU	Rationale	
	TSS*	None	None	90 mg/L	90 mg/L	Rationale	
	Turbidity	None	None	50 NTU	50 NTU	Rationale	
MSS057843-002	pH	None	None	9.0 SU	9.0 SU	Rationale	
	TSS*	None	None	90 mg/L	90 mg/L	Rationale	
	Turbidity	None	None	50 NTU	50 NTU	Rationale	
MSS057843-003	pH	None	None	9.0 SU	9.0 SU	Rationale	
	TSS*	None	None	90 mg/L	90 mg/L	Rationale	
	Turbidity	None	None	50 NTU	50 NTU	Rationale	

Each outfall will be monitored quarterly and results for pH and Suspended Solids will be reported semi-annually and the results for Turbidity will be reported quarterly.

XII.	BPJ STATEMENT: 

Based on the information provided and the applicable environmental regulations, the above proposed limits will be protective of human health and the environment.