PRETREATMENT RATIONALE FOR RENEWAL – SECOND DRAFT  

Golden Triangle Regional Solid Waste Management Authority  
Oktibbeha County
Starkville, Mississippi  
Water II Branch                                           	     

Permit No.: MSP091136
SIC Code: 4953
August 1, 2018  
Permit Engineer: Carter Cress
Agency Interest (AI) No.: 1987   

I.	        FACILITY INFORMATION

A.	Nature of Business: Municipal solid waste landfill. 

B.	Process Wastewater Description: Consists of landfill leachate, gas condensate, and wash water from equipment washing operations.  

C.	Proposed Flowrate: 	
Outfall No.	POTW Name	Flowrate	
001	Starkville POTW	Daily Maximum: 0.048 MGD 	
002	West Point POTW, West	Maximum: 0.048 MGD	

D.	Applicable Federal Guidelines: 40 CFR Part 403: General Pretreatment Regulations for Existing and New Sources of Pollution.   

II.	RECEIVING POTW INFORMATION

A.	POTW Names, AI Nos., and Permit Nos.:
POTW Name	AI No.	Permit No.	
Starkville POTW	13402	MS0036145	
West Point POTW, West	13451	MS0020788	

B.	POTW Treatment Types: 
POTW Name	Treatment Type(s)  	
Starkville POTW	Oxidation ditch system with grit screening and chlorine disinfection	
West Point POTW, West	Activated sludge system  	

C.	POTW Design Flowrates: 
POTW Name	Design Flowrate	
Starkville POTW	10.0 MGD  	
West Point POTW, West	3.5 MGD  	

D.	POTW Receiving Streams: 
POTW Name	Receiving Stream	
Starkville POTW	Hollis Creek  	
West Point POTW, West	Unnamed Tributary of Town Creek	

E.	POTW Receiving Streams’ 7Q10 (Q7/10): 
POTW Name	7Q10 ( Q7/10)  	
Starkville POTW	0 cfs = 0 MGD  	
West Point POTW, West	0 cfs = 0 MGD    	

OUTFALL 001: STARKVILLE POTW  

III.	PERTINENT FLOWRATE AND LOADING DATA

A.	POTW 12-month Average Flowrate (QPOTW): 4.2 MGD.    

POTW Monthly Average flowrate values using 12 months of recently-available DMR data (MGD): 
08/16	09/16	10/16	11/16	12/16	01/17	02/17	03/17	04/17	05/17	06/17	07/17	
3.9	3	3.4	3.5	4.1	5.2	5	5.4	4.4	3.8	5.1	3.3	

B.	Industrial Facilities Flowrates Data:

Facility 
(Permit No., AI No.)	Permitted Flow 
(Monthly Avg.)	Max. Monthly Avg. 
(Qw)1 	
Golden Triangle Regional Solid Waste Management Authority
(MSP091136, AI# 1987)  	0.048 MGD*  	0.012 MGD**	
Weavexx Corporation
(MSP090447, AI# 1678)  	0.101 MGD	0.13 MGD  	
Southwire Company
(MSP091592, AI# 2618)  	0.008262 MGD***	0.008262 MGD***  	
Total	0.157262 MGD	0.150262 MGD  	

1 the maximum Monthly Average value listed on 12 recently-available DMRs (August 2016 – July 2017).   

*this facility only has a permit limit for Daily Maximum.  Therefore, this is the Daily Maximum permit limit.  

**this is the largest Daily Maximum value listed on the DMRs from August 2016 – July 2017.  

***this facility has to Report its Quarterly Average.  Therefore, this is the largest Quarterly Average value listed on the 
DMRs from August 2016 – July 2017.  

C.	Current Maximum Permitted Loads (Xta):
Parameter	Golden Triangle Regional Solid Waste Management Authority	Weavexx Corporation  	Southwire Company 	Xtat	
Ammonia Nitrogen	35 lb/day	---	---	35 lb/day	
Oil and Grease	45 lb/day	84.2 lb/day1	---	129.2 lb/day	
BOD5	850 lb/day	758 lb/day1	---	1608 lb/day	
Total Suspended Solids	375 lb/day	253 lb/day1	---	628 lb/day	
Copper (Cu)	0.12 lb/day	---	Report Concentration 	0.12 lb/day	
Mercury (Hg)	Report Concentration  	---	---	0 lb/day	
pH	5.0 – 9.5 SU	6.0 – 8.5 SU	6.0 – 9.0 SU	---	
Lead (Pb)	---	---	Report Concentration	0 lb/day  	
Zinc (Zn)	---	---	Report Concentration	0 lb/day	
Cyanide (CN)	---	---	---	0 lb/day  	

1 this facility has limits on concentrations for these parameters.  Therefore, these load values were calculated using the maximum concentration permit limits and the permitted Monthly Average flowrate of 0.101 MGD.  

D.	Largest Average Discharge Values (Xt) using 12 months of recently-available DMR data (August 2016 – July 2017):
Parameter	Golden Triangle Regional Solid Waste Management Authority	Weavexx Corporation  	Southwire Company 	Xtt	
Ammonia Nitrogen	22.393 lb/day	---	---	22.393 lb/day	
Oil and Grease	0.613 lb/day  	17 lb/day*	---	17.613 lb/day	
BOD5	82.966 lb/day	56 lb/day**	---	138.966 lb/day	
Total Suspended Solids	6.255 lb/day	53 lb/day***	---	59.255 lb/day	
Copper (Cu)	0.0215 lb/day  	---	0.0052 lb/day****	0.0267 lb/day	
Mercury (Hg)	NODI=B2	---	---	0 lb/day	
pH	Min.: 7.49 SU;
Max.: 8.11 SU  	Min.: 7.1 SU;
Max.: 8.3 SU  	Min.: 7.14 SU;
Max.: 8.02 SU	---	
Lead (Pb)	---	---	0.0003 lb/day*****	0.0003 lb/day	
Zinc (Zn)	No data3	---	0.0333 lb/day******	0.0333 lb/day	
Cyanide (CN)	No data	---	---	0 lb/day 	

2 NODI=B is an EPA indicator code that means “below detect limit/no detect.”  

3 No data: This facility is required to monitor levels of this pollutant for discharge to Outfall 002: West Point POTW; however, since the facility has not discharged to Outfall 002 over this 12-month timeframe, no quantifiable data for this pollutant can be obtained.  
*This facility has to report its Daily Maximum concentration.  Therefore, this load value was calculated by using the largest Daily Maximum concentration value of 24.9 mg/L with the corresponding Monthly Average flowrate value of 0.083 MGD.  

**This facility has to report its Daily Maximum concentration.  Therefore, this load value was calculated by using the largest Daily Maximum concentration value of 117 mg/L with the corresponding Monthly Average flowrate value of 0.057 MGD.  

***This facility has to report its Daily Maximum concentration.  Therefore, this load value was calculated by using the largest Daily Maximum concentration value of 90 mg/L with the corresponding Monthly Average flowrate value of 0.07 MGD.  

****This facility has to report its Quarterly Average concentration.  Therefore, this load value was calculated by using the largest Quarterly Average concentration value of 0.082 mg/L with the corresponding Quarterly Average flowrate value of 0.007666 MGD.  

*****This facility has to report its Quarterly Average concentration.  Therefore, this load value was calculated by using the largest Quarterly Average concentration value of 0.006 mg/L with the corresponding Quarterly Average flowrate value of 0.006123 MGD.  

******This facility has to report its Quarterly Average concentration.  Therefore, this load value was calculated by using the largest Quarterly Average concentration value of 0.521 mg/L with the corresponding Quarterly Average flowrate value of 0.007666 MGD.  

IV.	BACKGROUND/DOMESTIC LOADING CALCULATIONS

Background Loading (BGL), lb/day = 8.34 x BGC (mg/L) x (QPOTW - QINDUSTRIAL) (MGD)

BGC = Background concentration of domestic sewage.  Calculated from actual POTW data as shown in Appendix A.1 or literature values from Appendix V of EPA’s Local Limits Development Guidance (EPA 833-R-04-002A, July 2004) for those pollutants with insufficient data.  

QINDUSTRIAL = QW1 + QW2 + …
where QW is the largest average flowrate from the DMRs over a recent twelve-month period.  (Maximum flowrate data may be used when monthly average data is not available.)  

BGL (Cu) = 8.34*0.0231*(4.2 – 0.020262) = 	0.81 lb/day
BGL (Ni) = 8.34*0.00209*(4.2 – 0) = 		0.073 lb/day
BGL (Zn) = 8.34*0.0534*(4.2 – 0.008262) = 	1.9 lb/day
BGL (CN) = 8.34*0.005*(4.2 – 0) = 			0.18 lb/day
BGL (Hg) = 8.34*0.00004*(4.2 – 0.012) = 		0.0014 lb/day

V.	WATER QUALITY ANALYSIS

A.	Instream Wastewater Concentration

IWC, % = [QPOTW / (QPOTW + Q7/10)] x 100 = [4.2/ (4.2 + 0)] *100 = 100 %

Since IWC > 1%, both acute and chronic screening are developed.  

B.	Allowable Water Quality Criteria (AWQC) Headworks Loading Calculations

AWQC, lb/day = 8.34 x CCRITICAL (mg/L) x (Q7/10 + QPOTW, MGD) / (1 – RPOTW)

CCRITICAL = Critical Concentration; obtained from State of Mississippi Water Quality Criteria for Intrastate, Interstate, and Coastal Waters: Freshwater Acute and Chronic Values.  Adopted June 28, 2012.  NOTE: the values for Hg were obtained from the National Recommended Water Quality Criteria for Aquatic Life by EPA.    

RPOTW = Removal efficiency, in decimal form, from actual POTW data (Appendix B.1) or from MDEQ-observed study data for those pollutants with insufficient data. 
 
ACUTE SCREENING:  

AWQC (Cu) = 8.34*0.0070*(0 + 4.2)/(1 – 0.726) = 		0.89 lb/day
AWQC (Ni) = 8.34*0.260*(0 + 4.2)/(1 – 0.482) = 		18 lb/day
AWQC (Zn) = 8.34*0.065*(0 + 4.2)/(1 – 0.703) = 		7.7 lb/day
AWQC (CN) = 8.34*0.0220*(0 + 4.2)/(1 – 0.62) = 		2.0 lb/day
AWQC (Hg) = 8.34*0.0014*(0 + 4.2)/(1 – 0.926) = 		0.66 lb/day

CHRONIC SCREENING:  

AWQC (Cu) = 8.34*0.0050*(0 + 4.2)/(1 – 0.726) = 		0.64 lb/day
AWQC (Ni) = 8.34*0.029*(0 + 4.2)/(1 – 0.482) = 		2.0 lb/day
AWQC (Zn) = 8.34*0.065*(0 + 4.2)/(1 – 0.703) = 		7.7 lb/day
AWQC (CN) = 8.34*0.0052*(0 + 4.2)/(1 – 0.62) = 		0.48 lb/day
AWQC (Hg) = 8.34*0.00077*(0 + 4.2)/(1 – 0.926) = 	0.36 lb/day

VI.	POTW INHIBITION ANALYSIS (HEADWORKS INHIBITION, HWI)

HWI, lb/day = 8.34 x QPOTW (MGD) x CINH (mg/L)
CINH = Activated Sludge Inhibition Levels, from EPA Guidance Manual on the Development and Implementation of Local Discharge Limitations Under the Pretreatment Program: Table 3-2 Activated Sludge Inhibition Threshold Levels.  For the mercury parameter, the minimum reported inhibition threshold is utilized.  For all other parameters, 1.0 mg/L is used since this value is near the minimum side of the minimum reported range of inhibition threshold levels.  

	HWI (Cu) = 8.34*4.2*1.0 = 		35 lb/day
	HWI (Ni) = 8.34*4.2*1.0 = 		35 lb/day
	HWI (Zn) = 8.34*4.2*1.0 = 		35 lb/day
	HWI (CN) = 8.34*4.2*1.0 = 		35 lb/day
	HWI (Hg) = 8.34*4.2*0.1 = 		3.5 lb/day

VII.	  LIMITING CASE (LC) SUMMARY TABLE – OUTFALL 001: STARKVILLE POTW  

Parameter	HWI (lb/day)	Acute AWQC (lb/day)	Chronic AWQC (lb/day)	Acute
LC* (lb/day)	Chronic
LC*
(lb/day)	BGL (lb/day)	Xtat (lb/day)	Xtt (lb/day)	BGL < LC (Pass/Fail)	Xtat < LC (Pass/Fail)	Xtt < LC (Pass/Fail)	
Cu	35	0.89	0.64	0.89	0.64	0.81	0.12	0.0267	FAIL	PASS	PASS	
Ni	35	18	2.0	18	2.0	0.073	0	0	PASS	PASS	PASS	
Zn	35	7.7	7.7	7.7	7.7	1.9	0	0.0333	PASS	PASS	PASS	
CN	35	2.0	0.48	2.0	0.48	0.18	0	0	PASS	PASS	PASS	
Hg	3.5	0.66	0.36	0.66	0.36	0.0014	0	0	PASS	PASS	PASS	

*If AWQC < HWI, then LC = AWQC; if AWQC > HWI, then LC = HWI.  

VIII.	DEVELOPMENT OF ALLOWABLE CONCENTRATIONS

The remaining industrial wasteload allocation will be used in calculating allowable acute and chronic concentrations using the “Industrial User (IU) Contributory Flow” method as described in EPA’s Local Limits Development Guidance (EPA 833-R-04-002A, July 2004).  

PAI, lb/day = (LC, lb/day – BGL, lb/day) x (QI, MGD / QT, MGD)

CALLOW, mg/L = (PAI, lb/day) / (8.34 x QI, MGD)

PAI 	=	Permit allocation for indirect discharger
CALLOW=	Allowable concentration for indirect discharger
QI	=	Applicant’s permitted process discharge 
QT	=	Total industrial contributory flow for pertinent pollutants
LC	=	Limiting case loading
BGL	=	Background/domestic loading

QT (MGD) Table
Facility	Cu	Ni 	Zn	CN	Hg	
Golden Triangle Regional Solid Waste Management Authority	0.048	---	---	---	0.048	
Weavexx Corporation	---	---	---	---	---	
Southwire Company	0.008262	---	0.008262	---	---	
Total	0.056262	0	0.008262	0	0.048	

ACUTE:
	
PAI (Hg) = (0.66 – 0.0014) *(0.048/0.048) = 		0.66 lb/day
CALLOW (Hg) = 0.66/ (8.34*0.048) = 			1.6 mg/L

CHRONIC:  

PAI (Cu) = (0.64 – 0.81) *(0.048/0.056262) = 	No Allocation 

Since there is no allocation for chronic copper, then PAI (Cu) Acute = BGL and PAI (Cu) Chronic = BGL * 2.5.  So, PAI (Cu) Acute = 0.81 lb/day and PAI (Cu) Chronic = 2.03 lb/day

PAI (Hg) = (0.36 – 0.0014) *(0.048/0.048) = 		0.36 lb/day
CALLOW (Hg) = 0.36/ (8.34*0.048) =	 		0.90 mg/L

IX.	  PROPOSED PERMIT LIMITATIONS – OUTFALL 001: STARKVILLE POTW    
Parameter	
Allowable Loads (AL)	
Current Permit (CPL) 	
Proposed Permit Limits	Sampling Frequency 	Sample Type	Basis of Decision	
	Acute
(lb/day)
	Chronic
(lb/day)
	Max.
(lb/day)
	Avg.
(lb/day)
	Max (lb/day)	Avg. (lb/day)	Max. (mg/L)	Avg. 
(mg/L)	Reporting Frequency			
Copper (Cu)	0.81
	2.03
	0.12
	Report
	0.12	Report	Report	Report	Twice/Month	Grab	CPL	
									Monthly			
Mercury (Hg)
	0.66
	0.36
	N/A
Report mg/L
	N/A
Report mg/L
	Report	Report
	Report
	Report
	Semiannually	Grab
	CPL
	
									Annually 			

Parameter	
Current Permit Limits (CPL)	
Proposed Permit Limits 	Sampling Frequency 	Sample Type	Basis of Decision	
	Average
	Maximum
	Average
	Maximum
	Reporting Frequency			
pH	5.0 SU (min)	9.5 SU	5.0 SU (min)	9.5 SU	Weekly	Grab	CPL	
					Monthly			
Ammonia Nitrogen	Report lb/day
	35 lb/day
	Report lb/day
	35 lb/day
	Twice/Month	Grab	CPL	
					Monthly  			
BOD5	Report lb/day
	850 lb/day
	Report lb/day
	850 lb/day
	Twice/Month	Grab	CPL	
					Monthly 			
Oil and Grease	Report lb/day
	45 lb/day
	Report lb/day
	45 lb/day
	Twice/Month	Grab	CPL	
					Monthly			
Total Suspended Solids	Report lb/day
	375 lb/day
	Report lb/day
	375 lb/day
	Twice/Month	Grab	CPL	
					Monthly			
Flow	Report MGD
	0.048 MGD	Report MGD
	0.048 MGD	Upon Each Occurrence	Batch	CPL	
					Monthly			

X.	STATEMENT OF BASIS (narrative)

There are currently no limits for mercury or average copper.  The data found in Section III.D. on page 3 indicates that mercury is being reported as non-detect and the average copper is well below the allowable loads; therefore, these parameters will remain as report in the permit.  

OUTFALL 002: WEST POINT POTW, WEST

XI.	 PERTINENT FLOWRATE AND LOADING DATA

A.	POTW 12-month Average Flowrate (QPOTW): 1.678 MGD.      

 POTW Monthly Average flowrate values using 12 months of recently-available DMR data (MGD): 
08/16	09/16	10/16	11/16	12/16	01/17	02/17	03/17	04/17	05/17	06/17	07/17	
1.357	0.962	0.92	0.878	1.657	2.105	2.094	2.452	1.831	1.995	2.426	1.459	

B.	Industrial Facilities Flowrates Data:

Facility 
(Permit No., AI No.)	Permitted Flow 
(Monthly Avg.)	Max. Monthly Avg. 
(Qw)1 	
Golden Triangle Regional Solid Waste Management Authority
(MSP091136, AI# 1987)  	0.048 MGD*	NODI=C2	
Yokohama Tire Manufacturing Mississippi LLC  
(MSP092351, AI# 64430)  	0.049 MGD**	0.049 MGD**	
Total	0.097 MGD	0.049 MGD  	

1 the maximum Monthly Average value listed on 12 recently-available DMRs (August 2016 – July 2017).  

2 NODI=C is an EPA indicator code that means “no discharge.”  

*this facility only has a permit limit for Maximum.  Therefore, this is the Maximum permit limit.  

**this facility has to Report its Monthly Average.  Therefore, this is the largest Monthly Average value listed on the DMRs from August 2016 – July 2017.  

C.	Current Maximum Permitted Loads (Xta):

Parameter	Golden Triangle Regional Solid Waste Management Authority	Yokohama Tire Manufacturing Mississippi LLC	Xtat	
Ammonia Nitrogen	Report Load	---	0 lb/day	
Oil and Grease	Report Load	41 lb/day1	41 lb/day	
BOD5	850 lb/day	Report Load/Concentration	850 lb/day	
Total Suspended Solids	375 lb/day	Report Load/Concentration	375 lb/day	
Copper (Cu)	Report Concentration	0.372 lb/day	0.372 lb/day	
Zinc (Zn)	Report Concentration	1.20 lb/day	1.20 lb/day	
Cyanide (CN)	Report Concentration	0.090 lb/day	0.090 lb/day	
Mercury (Hg)	Report Concentration  	---	0 lb/day	
pH	5.0 – 9.5 SU	5.0 – 11.0 SU 	---	
Cadmium (Cd)	---	0.030 lb/day	0.030 lb/day	
Chromium (Cr)	---	2.92 lb/day	2.92 lb/day	
Nickel (Ni)	---	0.346 lb/day	0.346 lb/day	
Diesel Hydrocarbons	---	163 lb/day1	163 lb/day	
Gasoline Hydrocarbons	---	163 lb/day1  	163 lb/day 	

1 this facility has limits on concentrations for these parameters.  Therefore, these load values were calculated using the maximum concentration permit limits and the largest Monthly Average flowrate on the DMRs from August 2016 – July 2017 of 0.049 MGD.    

D.	Largest Monthly Average Discharge Values (Xt) using 12 months of recently-available DMR data (August 2016 – July 2017): 

Parameter	Golden Triangle Regional Solid Waste Management Authority	Yokohama Tire Manufacturing Mississippi LLC	Xtt	
Ammonia Nitrogen	NODI=C1	---	0 lb/day	
Oil and Grease	NODI=C	5.5 lb/day	5.5 lb/day	
BOD5	NODI=C	9.75 lb/day	9.75 lb/day	
Total Suspended Solids	NODI=C	20 lb/day	20 lb/day	
Copper (Cu)	NODI=C	0.024 lb/day	0.024 lb/day	
Zinc (Zn)	NODI=C	0.47 lb/day	0.47 lb/day	
Cyanide (CN)	NODI=C	NODI=B2	0 lb/day	
Mercury (Hg)	NODI=C	---	0 lb/day	
pH	NODI=C	Min.: 7.2 S.U.;
Max.: 10.2 S.U.  	---	
Cadmium (Cd)	---	NODI=B	0 lb/day	
Chromium (Cr)	---	0.007 lb/day	0.007 lb/day	
Nickel (Ni)	---	NODI=B	0 lb/day	
Diesel Hydrocarbons	---	0.834 lb/day	0.834 lb/day	
Gasoline Hydrocarbons	---	NODI=B	0 lb/day  	

1 NODI=C is an EPA indicator code that means “no discharge.”  

2 NODI=B is an EPA indicator code that means “below detect limit/no detect.”  

XII.	BACKGROUND/DOMESTIC LOADING CALCULATIONS

Background Loading (BGL), lb/day = 8.34 x BGC (mg/L) x (QPOTW - QINDUSTRIAL) (MGD)

BGC = Background concentration of domestic sewage.  Calculated from actual POTW data as shown in Appendix A.2 or literature values from Appendix V of EPA’s Local Limits Development Guidance (EPA 833-R-04-002A, July 2004) for those pollutants with insufficient data.  

QINDUSTRIAL = QW1 + QW2 + …
where QW is the largest average flowrate from the DMRs over a recent twelve-month period.  (Maximum flowrate data may be used when monthly average data is not available.)  

BGL (Cu) = 8.34*0.0118*(1.678 – 0.049) = 		0.16 lb/day
BGL (Ni) = 8.34*0.00209*(1.678 – 0.049) = 	0.028 lb/day
BGL (Zn) = 8.34*0.0843*(1.678 – 0.049) = 		1.1 lb/day
BGL (CN) = 8.34*0.0025*(1.678 – 0.049) = 		0.034 lb/day
BGL (Hg) = 8.34*0.00003*(1.678 – 0.049) = 	0.00041 lb/day

XIII.	WATER QUALITY ANALYSIS

A.	Instream Wastewater Concentration

IWC, % = [QPOTW / (QPOTW + Q7/10)] x 100 = [1.678/(1.678 + 0)]*100 = 100 %

Since IWC > 1%, both acute and chronic screening are developed.  

B.	Allowable Water Quality Criteria (AWQC) Headworks Loading Calculations

AWQC, lb/day = 8.34 x CCRITICAL (mg/L) x (Q7/10 + QPOTW, MGD) / (1 – RPOTW)

CCRITICAL = Critical Concentration; obtained from State of Mississippi Water Quality Criteria for Intrastate, Interstate, and Coastal Waters: Freshwater Acute and Chronic Values.  Adopted June 28, 2012.  NOTE: the values for Hg were obtained from the National Recommended Water Quality Criteria for Aquatic Life by EPA.      

RPOTW = Removal efficiency, in decimal form, from actual POTW data (Appendix B.2) or from MDEQ-observed data for those pollutants with insufficient data.  

ACUTE SCREENING:  

AWQC (Cu) = 8.34*0.0070*(0 + 1.678)/(1 – 0.831) = 	0.580 lb/day
AWQC (Ni) = 8.34*0.260*(0 + 1.678)/(1 – 0.291) = 	5.13 lb/day
AWQC (Zn) = 8.34*0.065*(0 + 1.678)/(1 – 0.312) = 	1.32 lb/day
AWQC (CN) = 8.34*0.0220*(0 + 1.678)/(1 – 0.62) = 	0.8102 lb/day
AWQC (Hg) = 8.34*0.0014*(0 + 1.678)/(1 – 0.945) = 	0.356 lb/day

CHRONIC SCREENING:  

AWQC (Cu) = 8.34*0.0050*(0 + 1.678)/(1 – 0.831) = 	0.414 lb/day
AWQC (Ni) = 8.34*0.029*(0 + 1.678)/(1 – 0.291) = 	0.572 lb/day
AWQC (Zn) = 8.34*0.065*(0 + 1.678)/(1 – 0.312) = 	1.32 lb/day
AWQC (CN) = 8.34*0.0052*(0 + 1.678)/(1 – 0.62) = 	0.1915 lb/day
AWQC (Hg) = 8.34*0.00077*(0 + 1.678)/(1 – 0.945) = 	0.196 lb/day

XIV.	POTW INHIBITION ANALYSIS (HEADWORKS INHIBITION, HWI)

HWI, lb/day = 8.34 x QPOTW (MGD) x CINH (mg/L)

CINH = Activated Sludge Inhibition Levels, from EPA Guidance Manual on the Development and Implementation of Local Discharge Limitations Under the Pretreatment Program: Table 3-2 Activated Sludge Inhibition Threshold Levels.  For the mercury parameter, the minimum reported inhibition threshold is utilized.  For all other parameters, 1.0 mg/L is used since this value is near the minimum side of the minimum reported range of inhibition threshold levels. 
 
	HWI (Cu) = 8.34*1.678*1.0 = 		13.99 lb/day
	HWI (Ni) = 8.34*1.678*1.0 = 		13.99 lb/day
	HWI (Zn) = 8.34*1.678*1.0 = 		13.99 lb/day
	HWI (CN) = 8.34*1.678*1.0 = 		13.99 lb/day
	HWI (Hg) = 8.34*1.678*0.1 = 		1.399 lb/day

XV.	LIMITING CASE (LC) SUMMARY TABLE – OUTFALL 002: WEST POINT POTW, WEST      

Parameter	HWI (lb/day)	Acute AWQC (lb/day)	Chronic AWQC (lb/day)	Acute POTW LC1
(lb/day)	Chronic
POTW
LC1
(lb/day)	Acute
LC* (lb/day)	Chronic
LC** (lb/day)	BGL (lb/day)	Xtat (lb/day)	Xtt (lb/day)	BGL < LC (Pass/Fail)	Xtat < LC (Pass/Fail)	Xtt < LC (Pass/Fail)	
Cu	13.99	0.580	0.414	---	---	0.580	0.414	0.16	0.372	0.024	PASS	PASS	PASS	
Ni	13.99	5.13	0.572	---	---	5.13	0.572	0.028	0.346	0	PASS	PASS	PASS	
Zn	13.99	1.32	1.32	1.32	1.32	1.32	1.32	1.1	1.20	0.47	PASS	PASS	PASS	
CN	13.99	0.8102	0.1915	---	---	0.8102	0.1915	0.034	0.090	0	PASS	PASS	PASS	
Hg	1.399	0.356	0.196	---	---	0.356	0.196	0.00041	0	0	PASS	PASS	PASS	

*This value is the lowest value from the HWI, Acute AWQC, and Acute POTW LC columns.

**This value is the lowest value from the HWI, Chronic AWQC, and Chronic POTW LC columns.   

1 If the POTW has a limit for a specific parameter, industrial loading is limited to the amount the POTW can accept and still meet the limit.  The POTW has permit limits for zinc.  POTW LC (lb/day) = (8.34 x CPOTW (mg/L) x QPOTW (MGD)) / (1 – RPOTW), where CPOTW is the POTW concentration limit in mg/L.  

Zn:	Maximum:	POTW LC = (8.34*0.065*1.678)/(1 – 0.312) = 	1.32 lb/day	
	Average:	POTW LC = (8.34*0.065*1.678)/(1 – 0.312) = 	1.32 lb/day

XVI.	DEVELOPMENT OF ALLOWABLE CONCENTRATIONS

The remaining industrial wasteload allocation will be used in calculating allowable acute and chronic concentrations using the “Industrial User (IU) Contributory Flow” method as described in EPA’s Local Limits Development Guidance (EPA 833-R-04-002A, July 2004).  

PAI, lb/day = (LC, lb/day – BGL, lb/day) x (QI, MGD / QT, MGD)
CALLOW, mg/L = (PAI, lb/day) / (8.34 x QI, MGD)

PAI 	=	Permit allocation for indirect discharger
CALLOW=	Allowable concentration for indirect discharger
QI	=	Applicant’s permitted process discharge 
QT	=	Total industrial contributory flow for pertinent pollutants
LC	=	Limiting case loading
BGL	=	Background/domestic loading

QT (MGD) Table
Facility	Cu	Ni 	Zn	CN	Hg	
Golden Triangle Regional Solid Waste Management Authority	0.048	---	0.048	0.048	0.048	
Yokohama Tire Manufacturing Mississippi LLC  	0.049	0.049	0.049	0.049	---	
Total	0.097	0.049	0.097	0.097	0.048	

ACUTE:

PAI (Cu) = (0.580 – 0.16)*(0.048/0.097) = 		0.21 lb/day
CALLOW (Cu) = 0.21/(8.34*0.048) = 			0.52 mg/L

PAI (Zn) = (1.32 – 1.1)*(0.048/0.097) = 		0.11 lb/day
CALLOW (Zn) = 0.11/(8.34*0.048) = 			0.27 mg/L

PAI (CN) = (0.8102 – 0.034)*(0.048/0.097) = 	0.38 lb/day
CALLOW (CN) = 0.38/(8.34*0.048) = 			0.95 mg/L
	
PAI (Hg) = (0.356 – 0.00041)*(0.048/0.048) = 	0.36 lb/day
CALLOW (Hg) = 0.36/(8.34*0.048) = 			0.90 mg/L

CHRONIC:  

PAI (Cu) = (0.414 – 0.16)*(0.048/0.097) = 		0.13 lb/day
CALLOW (Cu) = 0.13/(8.34*0.048) = 			0.32 mg/L

PAI (Zn) = (1.32 – 1.1)*(0.048/0.097) = 		0.11 lb/day
CALLOW (Zn) = 0.11/(8.34*0.048) = 			0.27 mg/L

PAI (CN) = (0.1915 – 0.034)*(0.048/0.097) = 	0.078 lb/day
CALLOW (CN) = 0.078/(8.34*0.048) = 		0.19 mg/L

PAI (Hg) = (0.196 – 0.00041)*(0.048/0.048) = 	0.097 lb/day
CALLOW (Hg) = 0.097/(8.34*0.048) =	 		0.24 mg/L

XVII.	PROPOSED PERMIT LIMITATIONS – OUTFALL 002: WEST POINT POTW, WEST
Parameter	
Allowable Loads (AL)	
Current Permit (CPL) 	
Proposed Permit Limits	Sampling Frequency 	Sample Type	Basis of Decision	
	Acute
(lb/day)
	Chronic
(lb/day)
	Max.
(lb/day)
	Avg.
(lb/day)
	Max 
(lb/day)	Avg. (lb/day)	Max. (mg/L)	Avg. 
(mg/L)	Reporting Frequency			
Copper (Cu)	0.21
	0.13
	Report mg/L	Report mg/L	---	---	Report	Report	Monthly	Grab	CPL	
									Quarterly			
Zinc (Zn)	0.11
	0.11
	Report mg/L	Report mg/L	---	---	Report	Report	Monthly	Grab	CPL	
									Quarterly			
Cyanide (CN)	0.38	0.078	Report mg/L	Report mg/L	---	---	Report	Report	Monthly	Grab	CPL	
									Quarterly			
Mercury (Hg)
	0.36
	0.097
	Report mg/L	Report mg/L	---	---	Report	Report	Semiannually	Grab	CPL	
									Annually			

Parameter	
Current Permit Limits (CPL)	
Proposed Permit Limits 	Sampling Frequency 	Sample Type	Basis of Decision	
	Average
	Maximum
	Average
	Maximum
	Reporting Frequency			
pH	5.0 SU (min)	9.5 SU	5.0 SU (min)	9.5 SU	Monthly	Grab	CPL	
					Quarterly			
Ammonia Nitrogen	Report lb/day
	Report lb/day
	Report lb/day
	Report lb/day
	Monthly	Grab	CPL	
					Quarterly			
BOD5	Report lb/day
	850 lb/day
	Report lb/day
	850 lb/day
	Monthly	Grab	CPL	
					Quarterly			
Oil and Grease	Report lb/day
	Report lb/day
	Report lb/day
	Report lb/day
	Monthly	Grab	CPL	
					Quarterly			
Total Suspended Solids	Report lb/day
	375 lb/day
	Report lb/day
	375 lb/day
	Monthly	Grab	CPL	
					Quarterly			
Flow	Report MGD
	0.048 MGD	Report MGD
	0.048 MGD	Upon each Occurrence  	Batch	CPL	
					Quarterly			

XVIII.	STATEMENT OF BASIS (narrative)

There are currently no limits for copper, zinc, cyanide, or mercury.  The data found in Section XI.D. on page 12 indicates that the data is well below the allowable loads; therefore, these parameters will remain as report in the permit.

APPENDIX A.1

OUTFALL 001: STARKVILLE POTW  

BACKGROUND CONCENTRATION OF DOMESTIC SEWAGE*

Copper (Cu):		BGC =	0.0231 mg/L
Nickel (Ni):	BGC = 	0.00209 mg/L
Zinc (Zn):	BGC = 	0.0534 mg/L
Cyanide (CN)	BGC =	0.005 mg/L
Mercury (Hg)	BGC =	0.00004 mg/L  

*These values were obtained from the 5 tables that follow in the subsequent pages.  BGC was calculated by summing the domestic concentrations of the individual samples and then dividing this amount by the number of these samples. 

	March 
2014	April 
2014	May 
2014	June
2014  	
Starkville POTW

Flow*, MGD:
Conc., mg/L:
Load, lb/day:	

5.521
0.0229
1.05	

6.507
0.0208
1.13	

3.9
0.0297
0.97	

4.3  
0.02225
0.80	
Golden Triangle Regional Solid Waste Management Authority

Flow, MGD:
Conc.*, mg/L:
Load*, lb/day:	

0.02
0.2151
0.04	

0.02
0.12
0.02	

0.02
0.215
0.04	

0.02
0.2
0.03	
Weavexx Corporation

Flow*, MGD:
Conc.*, mg/L:
Load*, lb/day:	

0.037
Not permitted
Not permitted	

0.042
Not permitted
Not permitted	

0.021
Not permitted
Not permitted	

0.018  
Not permitted
Not permitted	
Southwire Company

Flow*, MGD:
Conc.*, mg/L:
Load*, lb/day: 	

0.012876
0.078
0.0084	

0.014944
0.083
0.010	

0.014944
0.083
0.010	

0.014944
0.083
0.010	
DOMESTIC FLOW, MGD:	5.488124	6.472056	3.865056	4.265056	
DOMESTIC LOAD, lb/day:	1.0016	1.10	0.92	0.76	
DOMESTIC CONC., mg/L:	0.022	0.0204	0.029	0.021	
DATA FOR COPPER (Cu) BACKGROUND/DOMESTIC CONCENTRATION

Average Domestic Concentration for Copper (Cu) = BGC = 0.0231 mg/L   

*These values are the Averages listed on the DMRs.  Average values are preferred over Maximum values because they present a more representative model of the facility’s typical effluent.  

	March 
2014	April 
2014	May 
2014	June
2014  	
Starkville POTW

Flow*, MGD:
Conc., mg/L:
Load, lb/day:	

5.521
0.00178
0.0819	

6.507
0.00191
0.104	

3.9
0.00242
0.0787	

4.3  
0.002245
0.0805	
Golden Triangle Regional Solid Waste Management Authority

Flow, MGD:
Conc.*, mg/L:
Load*, lb/day:	

0.02
Not permitted
Not permitted	

0.02
Not permitted
Not permitted	

0.02
Not permitted
Not permitted	

0.02
Not permitted
Not permitted	
Weavexx Corporation

Flow*, MGD:
Conc.*, mg/L:
Load*, lb/day:	

0.037
Not permitted
Not permitted	

0.042
Not permitted
Not permitted	

0.021
Not permitted
Not permitted	

0.018  
Not permitted
Not permitted	
Southwire Company

Flow*, MGD:
Conc.*, mg/L:
Load*, lb/day: 	

0.012876
Not permitted
Not permitted	

0.014944
Not permitted
Not permitted	

0.014944
Not permitted
Not permitted	

0.014944
Not permitted
Not permitted	
DOMESTIC FLOW, MGD:	5.521	6.507	3.9	4.3	
DOMESTIC LOAD, lb/day:	0.0819	0.104	0.0787	0.0805	
DOMESTIC CONC., mg/L:	0.00178	0.00191	0.00242	0.002245	
DATA FOR NICKEL (Ni) BACKGROUND/DOMESTIC CONCENTRATION

Average Domestic Concentration for Nickel (Ni) = BGC = 0.00209 mg/L   

*These values are the Averages listed on the DMRs.  Average values are preferred over Maximum values because they present a more representative model of the facility’s typical effluent.  

	March 
2014	April 
2014	May 
2014	June
2014  	
Starkville POTW

Flow*, MGD:
Conc., mg/L:
Load, lb/day:	

5.521
0.0482
2.22	

6.507
0.0490
2.66	

3.9
0.0679
2.21	

4.3  
0.05525
1.98	
Golden Triangle Regional Solid Waste Management Authority

Flow, MGD:
Conc.*, mg/L:
Load*, lb/day:	

0.02
Not permitted
Not permitted	

0.02
Not permitted
Not permitted	

0.02
Not permitted
Not permitted	

0.02
Not permitted
Not permitted	
Weavexx Corporation

Flow*, MGD:
Conc.*, mg/L:
Load*, lb/day:	

0.037
Not permitted
Not permitted	

0.042
Not permitted
Not permitted	

0.021
Not permitted
Not permitted	

0.018  
Not permitted
Not permitted	
Southwire Company

Flow*, MGD:
Conc.*, mg/L:
Load*, lb/day: 	

0.012876
0.702
0.0754	

0.014944
0.622
0.0775	

0.014944
0.622
0.0775	

0.014944
0.622
0.0775	
DOMESTIC FLOW, MGD:	5.508124	6.492056	3.885056	4.285056	
DOMESTIC LOAD, lb/day:	2.1446	2.5825	2.1325	1.9025	
DOMESTIC CONC., mg/L:	0.0467	0.0477	0.0658	0.0532	
DATA FOR ZINC (Zn) BACKGROUND/DOMESTIC CONCENTRATION

Average Domestic Concentration for Zinc (Zn) = BGC = 0.0534 mg/L   

*These values are the Averages listed on the DMRs.  Average values are preferred over Maximum values because they present a more representative model of the facility’s typical effluent.  

	March 
2014	April 
2014	May 
2014	June
2014  	
Starkville POTW

Flow*, MGD:
Conc., mg/L:
Load, lb/day:	

5.521
0.005
0.2302	

6.507
0.005
0.2713	

3.9
0.005
0.16	

4.3  
0.005
0.18	
Golden Triangle Regional Solid Waste Management Authority

Flow, MGD:
Conc.*, mg/L:
Load*, lb/day:	

0.02
Not permitted
Not permitted	

0.02
Not permitted
Not permitted	

0.02
Not permitted
Not permitted	

0.02
Not permitted
Not permitted	
Weavexx Corporation

Flow*, MGD:
Conc.*, mg/L:
Load*, lb/day:	

0.037
Not permitted
Not permitted	

0.042
Not permitted
Not permitted	

0.021
Not permitted
Not permitted	

0.018  
Not permitted
Not permitted	
Southwire Company

Flow*, MGD:
Conc.*, mg/L:
Load*, lb/day: 	

0.012876
Not permitted
Not permitted	

0.014944
Not permitted
Not permitted	

0.014944
Not permitted
Not permitted	

0.014944
Not permitted
Not permitted	
DOMESTIC FLOW, MGD:	5.521	6.507	3.9	4.3	
DOMESTIC LOAD, lb/day:	0.2302	0.2713	0.16	0.18	
DOMESTIC CONC., mg/L:	0.005	0.005	0.005	0.005	
DATA FOR CYANIDE (CN) BACKGROUND/DOMESTIC CONCENTRATION

Average Domestic Concentration for Cyanide (CN) = BGC 0.005 mg/L   

*These values are the Averages listed on the DMRs.  Average values are preferred over Maximum values because they present a more representative model of the facility’s typical effluent.  

	March 
2014	April 
2014	May 
2014	June
2014  	
Starkville POTW

Flow*, MGD:
Conc., mg/L:
Load, lb/day:	

5.521
0.0000519
0.00239	

6.507
0.0000315
0.00171	

3.9
0.0000323
0.00105	

4.3  
0.0000269
0.000964	
Golden Triangle Regional Solid Waste Management Authority

Flow, MGD:
Conc., mg/L:
Load, lb/day:	

0.02
0.000015
0.000003	

0.02
0.000015
0.000003	

0.02
0.000015
0.000003	

0.02
0.000015
0.000003	
Weavexx Corporation

Flow*, MGD:
Conc.*, mg/L:
Load*, lb/day:	

0.037
Not permitted
Not permitted	

0.042
Not permitted
Not permitted	

0.021
Not permitted
Not permitted	

0.018  
Not permitted
Not permitted	
Southwire Company

Flow*, MGD:
Conc.*, mg/L:
Load*, lb/day: 	

0.012876
Not permitted
Not permitted	

0.014944
Not permitted
Not permitted	

0.014944
Not permitted
Not permitted	

0.014944
Not permitted
Not permitted	
DOMESTIC FLOW, MGD:	5.501	6.487	3.88	4.28	
DOMESTIC LOAD, lb/day:	0.002387	0.001707	0.001047	0.000961	
DOMESTIC CONC., mg/L:	0.00005	0.00003	0.00003	0.00003	
DATA FOR MERCURY (Hg) BACKGROUND/DOMESTIC CONCENTRATION

Average Domestic Concentration for Mercury (Hg) = BGC = 0.00004 mg/L   

*These values are the Averages listed on the DMRs.  Average values are preferred over Maximum values because they present a more representative model of the facility’s typical effluent.  

APPENDIX A.2

OUTFALL 002: WEST POINT POTW, WEST    

BACKGROUND CONCENTRATION OF DOMESTIC SEWAGE*

Copper (Cu):		BGC = 	0.0118 mg/L
Nickel (Ni):		BGC = 	0.00219 mg/L
Zinc (Zn):		BGC = 	0.0843 mg/L
Cyanide (CN):		BGC = 	0.0025 mg/L
Mercury (Hg):		BGC = 	0.00003 mg/L

*These values were obtained from the 5 tables that follow in the subsequent pages.  BGC was calculated by summing the domestic concentrations of the individual samples and then dividing this amount by the number of these samples.  

	April
2015	May 
2015	June
2015	July
2015	August
2015	September
2015  	
West Point POTW, West

Flow*, MGD:
Conc., mg/L:
Load, lb/day:	

3.167
0.006305
0.166	

2.198
0.009005
0.165	

1.541
0.0129
0.166	

1.307
0.0174
0.190	

1.287
0.01227
0.132	

1.032
0.01395
0.120	
Golden Triangle Regional Solid Waste Management Authority

Flow*, MGD:
Conc.*, mg/L:
Load*, lb/day:	

0.0134
0.0587
0.00656	

0.0134
0.0587
0.00656	

0.0134
0.0587
0.00656	

NODI=C
NODI=C
NODI=C	

NODI=C
NODI=C
NODI=C	

NODI=C
NODI=C
NODI=C	
Yokohama Tire Manufacturing Mississippi LLC  

Flow*, MGD:
Conc.*, mg/L:
Load*, lb/day:	

NODI=C
NODI=C
NODI=C	

NODI=C
NODI=C
NODI=C	

NODI=C
NODI=C
NODI=C	

NODI=C
NODI=C
NODI=C	

0.024
0.011
0.001	

0.022
0.027
0.006	
DOMESTIC FLOW, MGD:	3.1536	2.1846	1.5276	1.307	1.263	1.010	
DOMESTIC LOAD, lb/day:	0.15944	0.15844	0.15944	0.190	0.131	0.114	
DOMESTIC CONC., mg/L:	0.00606	0.00870	0.0125	0.0174	0.0124	0.0135	
DATA FOR COPPER (Cu) BACKGROUND/DOMESTIC CONCENTRATION

Average Domestic Concentration for Copper (Cu) = BGC = 0.0118 mg/L   

*These values are the Averages listed on the DMRs.  Average values are preferred over Maximum values because they present a more representative model of the facility’s typical effluent.  

	April
2015	May 
2015	June
2015	July
2015	August
2015	September
2015  	
West Point POTW, West

Flow*, MGD:
Conc., mg/L:
Load, lb/day:	

3.167
0.00189
0.0499	

2.198
0.002075
0.0380	

1.541
0.002405
0.0309	

1.307
0.002435
0.0265	

1.287
0.001955
0.0210	

1.032
0.00231
0.0199	
Golden Triangle Regional Solid Waste Management Authority

Flow*, MGD:
Conc.*, mg/L:
Load*, lb/day:	

0.0134
Not permitted
Not permitted	

0.0134
Not permitted
Not permitted	

0.0134
Not permitted
Not permitted	

NODI=C
Not permitted
Not permitted	

NODI=C
Not permitted
Not permitted	

NODI=C 
Not permitted
Not permitted	
Yokohama Tire Manufacturing Mississippi LLC  

Flow*, MGD:
Conc.*, mg/L:
Load*, lb/day:	

NODI=C
NODI=C
NODI=C	

NODI=C
NODI=C
NODI=C	

NODI=C
NODI=C
NODI=C	

NODI=C
NODI=C
NODI=C	

0.024
NODI=B
NODI=B	

0.022
NODI=B
NODI=B	
DOMESTIC FLOW, MGD:	3.167	2.198	1.541	1.307	1.263	1.010	
DOMESTIC LOAD, lb/day:	0.0499	0.0380	0.0309	0.0265	0.0210	0.0199	
DOMESTIC CONC., mg/L:	0.00189	0.002075	0.002405	0.002435	0.00199	0.00236	
DATA FOR NICKEL (Ni) BACKGROUND/DOMESTIC CONCENTRATION

Average Domestic Concentration for Nickel (Ni) = BGC = 0.00219 mg/L   

*These values are the Averages listed on the DMRs.  Average values are preferred over Maximum values because they present a more representative model of the facility’s typical effluent.  

	April
2015	May 
2015	June
2015	July
2015	August
2015	September
2015  	
West Point POTW, West

Flow*, MGD:
Conc., mg/L:
Load, lb/day:	

3.167
0.0476
1.26	

2.198
0.0705
1.29	

1.541
0.0883
1.13	

1.307
0.12655
1.38	

1.287
0.109
1.17	

1.032
0.0930
0.800	
Golden Triangle Regional Solid Waste Management Authority

Flow*, MGD:
Conc.*, mg/L:
Load*, lb/day:	

0.0134
0.0606
0.00677	

0.0134
0.0606
0.00677	

0.0134
0.0606
0.00677	

NODI=C
NODI=C
NODI=C	

NODI=C
NODI=C
NODI=C	

NODI=C
NODI=C
NODI=C	
Yokohama Tire Manufacturing Mississippi LLC  

Flow*, MGD:
Conc.*, mg/L:
Load*, lb/day:	

NODI=C
NODI=C
NODI=C	

NODI=C
NODI=C
NODI=C	

NODI=C
NODI=C
NODI=C	

NODI=C
NODI=C
NODI=C	

0.024
0.665
0.1	

0.022
1.145
0.2	
DOMESTIC FLOW, MGD:	3.1536	2.1846	1.5276	1.307	1.263	1.010	
DOMESTIC LOAD, lb/day:	1.25323	1.28323	1.12323	1.38	1.07	0.600	
DOMESTIC CONC., mg/L:	0.0477	0.0704	0.0882	0.12655	0.102	0.0712	
DATA FOR ZINC (Zn) BACKGROUND/DOMESTIC CONCENTRATION

Average Domestic Concentration for Zinc (Zn) = BGC = 0.0843 mg/L   

*These values are the Averages listed on the DMRs.  Average values are preferred over Maximum values because they present a more representative model of the facility’s typical effluent.  

	April
2015	May 
2015	June
2015	July
2015	August
2015	September
2015  	
West Point POTW, West

Flow*, MGD:
Conc., mg/L:
Load, lb/day:	

3.167
0.0025
0.0660	

2.198
0.0025
0.0458	

1.541
0.0025
0.0321	

1.307
0.0025
0.0272	

1.287
0.0025
0.0268	

1.032
0.0025
0.0215	
Golden Triangle Regional Solid Waste Management Authority

Flow*, MGD:
Conc.*, mg/L:
Load*, lb/day:	

0.0134
NODI=B
NODI=B	

0.0134
NODI=B
NODI=B	

0.0134
NODI=B
NODI=B	

NODI=C
NODI=C
NODI=C	

NODI=C
NODI=C
NODI=C	

NODI=C
NODI=C
NODI=C	
Yokohama Tire Manufacturing Mississippi LLC  

Flow*, MGD:
Conc.*, mg/L:
Load*, lb/day:	

NODI=C
NODI=C
NODI=C	

NODI=C
NODI=C
NODI=C	

NODI=C
NODI=C
NODI=C	

NODI=C
NODI=C
NODI=C	

0.024
NODI=B
NODI=B	

0.022
NODI=B
NODI=B	
DOMESTIC FLOW, MGD:	3.1536	2.1846	1.5276	1.307	1.263	1.010	
DOMESTIC LOAD, lb/day:	0.0660	0.0458	0.0321	0.0272	0.0268	0.0215	
DOMESTIC CONC., mg/L:	0.0025	0.0025	0.0025	0.0025	0.0025	0.0026	
DATA FOR CYANIDE (CN) BACKGROUND/DOMESTIC CONCENTRATION

Average Domestic Concentration for Cyanide (CN) = BGC = 0.0025 mg/L   

*These values are the Averages listed on the DMRs.  Average values are preferred over Maximum values because they present a more representative model of the facility’s typical effluent.  

	April
2015	May 
2015	June
2015	July
2015	August
2015	September
2015  	
West Point POTW, West

Flow*, MGD:
Conc., mg/L:
Load, lb/day:	

3.167
No data
No data	

2.198
0.000005
0.0000916	

1.541
0.0001015
0.00130	

1.307
0.00003785
0.000412	

1.287
0.0000102
0.000109	

1.032
0.0000113
0.0000972	
Golden Triangle Regional Solid Waste Management Authority

Flow*, MGD:
Conc., mg/L:
Load, lb/day:	

0.0134
0.000005
0.0000006	

0.0134
0.000005
0.0000006	

0.0134
0.000005
0.0000006	

NODI=C
NODI=C
NODI=C	

NODI=C
NODI=C
NODI=C	

NODI=C
NODI=C
NODI=C	
Yokohama Tire Manufacturing Mississippi LLC  

Flow*, MGD:
Conc.*, mg/L:
Load*, lb/day:	

NODI=C
Not permitted
Not permitted	

NODI=C
Not permitted
Not permitted	

NODI=C
Not permitted
Not permitted	

NODI=C
Not permitted
Not permitted	

0.024
Not permitted
Not permitted	

0.022
Not permitted
Not permitted	
DOMESTIC FLOW, MGD:	3.1536	2.1846	1.5276	1.307	1.287	1.032	
DOMESTIC LOAD, lb/day:	No data	0.0000910	0.00130	0.000412	0.000109	0.0000972	
DOMESTIC CONC., mg/L:	No data	0.000005	0.0001	0.00004	0.00001	0.00001	
DATA FOR MERCURY (Hg) BACKGROUND/DOMESTIC CONCENTRATION

Average Domestic Concentration for Mercury (Hg) = BGC = 0.00003 mg/L   

*These values are the Averages listed on the DMRs.  Average values are preferred over Maximum values because they present a more representative model of the facility’s typical effluent. 

APPENDIX B.1

[mg/L]	

3/5/14	

3/12/14	

3/19/14	

4/2/14	

4/9/14	

4/16/14	

4/21/14	

5/7/14	

5/14/14

5/21/14	

6/4/14	

6/11/14	
Removal Efficiency1	
Cu
Inf.	0.0235	0.0219	0.0233	0.0273	0.0147	No data	0.0204	0.0321	0.0225	0.0345	0.0317	0.0128	

72.6 %	
Cu
Eff.	0.00628	0.00637	0.00598	0.00588	0.00554	0.00604	No data	0.00645	0.00670	0.00783	0.00923	0.00611		
Ni
Inf.	0.00167	0.00198	0.00170	0.00212	0.00213	No data	0.00148	0.00209	0.00222	0.00295	0.00248	0.00201	

48.2 %	
Ni
Eff.	0.000722	0.000969	0.000860	0.00104	0.00104	0.000849	No data	0.000926	0.00109	0.00172	0.00153	0.00107		
Zn
Inf.	0.0507	0.0441	0.0498	0.0608	0.0380	No data	0.0481	0.0731	0.0628	0.0679	0.0732	0.0373	

70.3 %	
Zn
Eff.	0.0173	0.0161	0.0184	0.0178	0.0118	0.0122	No data	0.0185	0.0177	0.0184	0.0183	0.0135		
CN
Inf.	0.005	0.005	0.005	0.005	0.005	0.005	No data	0.005	0.005	0.005	0.005	0.005	

62 %*	
CN
Eff.	0.005	0.005	0.005	0.005	0.005	0.005	No data	0.005	0.005	0.005	0.005	0.005		
Hg
Inf.	0.0000181	0.000114	0.0000235	0.0000338	0.0000212	0.0000395	No data	.0000326	.0000322	.0000320	.0000205	.0000332	

92.6 %	
Hg
Eff.	0.00000280	0.00000770	0.00000150	.00000100	0.00000481	0.00000220	No data	.0000012	.0000014	.0000008	.0000016	.0000045		
OUTFALL 001 – STARKVILLE POTW (REMOVAL EFFICIENCIES)

APPENDIX B.2

OUTFALL 002 – WEST POINT POTW, WEST (REMOVAL EFFICIENCIES)

[mg/L]	

4/22/15	

4/29/15	

5/6/15	

5/20/15	

6/3/15	

6/17/15	

7/8/15	

7/22/15	

8/5/15	

8/19/15	

9/2/15	

9/16/15	
Removal Efficiency1	
Cu
Inf.	0.00612	0.00649	0.00834	0.00967	0.0122	0.0136	0.0119	0.0229	0.0163	0.00824	0.0150	0.0129	

83.1 %	
Cu
Eff.	0.00149	0.00100	0.00127	0.00181	0.00217	0.00126	0.00173	0.00307	0.00220	0.00174	0.00256	0.00391		
Ni
Inf.	0.00206	0.00172	0.00218	0.00197	0.00260	0.00221	0.00212	0.00275	0.00246	0.00145	0.00255	0.00207	

29.1 %	
Ni
Eff.	0.00158	0.00116	0.00133	0.00142	0.00161	0.00169	0.00159	0.00169	0.00196	0.00124	0.00160	0.00166		
Zn
Inf.	0.0449	0.0476	0.0540	0.0705	0.0746	0.102	0.0921	0.161	0.109	0.0515	0.105	0.0810	

31.2 %	
Zn
Eff.	0.0488	0.0437	0.0681	0.0602	0.0612	0.0668	0.0643	0.0719	0.0694	0.0559	0.0721	0.0704		
CN
Inf.	0.0025	0.0025	0.0025	0.0025	0.0025	0.0025	0.0025	0.0025	0.0025	0.0025	0.0025	0.0025	

62 %*	
CN
Eff.	0.0025	0.0025	0.0025	0.0025	0.0025	0.0025	0.0025	0.0025	0.0025	0.005	0.0025	0.0025		
Hg
Inf.	---	---	---	0.000005	0.000011	0.000192	.0000138	.0000619	.0000067	.0000137	.0000113	0.000001	

94.5 %	
Hg
Eff.	---	---	---	0.000001	0.000001	.00000250	0.000002	.0000030	.0000017	.0000029	.0000033	.0000048		

1 Removal Efficiency = [(<inf.> - <eff.>)/<inf.>]*100, where <inf.> is the average influent value and <eff.> is the average effluent value.

Yellow Shaded Values were excluded because either the inf. > eff. or inf. = eff. for the same sample date.  

Blue Values were used in “non-detect” results in which the Method Quantitation Limit (MQL) was then divided by 2 to obtain the blue value.  

*Due to inadequate data from the actual POTW, MDEQ study data for activated sludge systems was used. An oxidation ditch system is a modified activated sludge system.