NC0033421_1976-1991_20141205

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NPDES WASTE LOAD ALLOCATION
{
PERMIT NO.: NCO033421 Modeler Date Rec. #
pERM1TTEE NAME: Carolina Water Service, Inc. of N. C. SMS
C L �3zS
FA ILITY NAME: College Park Subdivision Drainage Area(mit ) .0 3 Avg. Streamflow (cfs):A V
Facility Status: Existing 7Q10 (cfs) O. 3 Winter 7Q10 (cfs) &?"' 30Q2 (cfs) I- c)
Permit Status: Renewal Toxicity Limits: IWC % Acute/Chronic
Major Minor Instream Monitoring:
Pipe No.: 001 Parameters
Design Capacity: 0.022 MGD Upstream Location
Domestic (% of Flow): 100 % Downstream Location
Industrial (% of Flow):
Effluent Summer Winter
Comments: Characteristics
Refer : Basinwide / Streamline WLA File 5
Completed By Permits & Engineering BOD (mg/1) 3 o 3 0
At Front Of Subbasin NH -N (mg/1) • / r
RECEIVING STREAM:Little Long CreekD.O. (mg/1)
Class: C TSS (mg/1) 30 3 0
Sub-Basin: 03-08-36 F. Col. (/100 ml)
Reference USGS Quad: F 14 SW (please attach)
County: Gaston pH (SU)
Regional Office: Mooresville Regional Office
Previous Exp. Date: 11/30/91 Treatment Plant Class: H
Classification changes within three miles:
Requested by: Angela Y. Griffin Date: 6/28/91 P1 (fl I 8MIF
Prepared by: aflo,,,, Date: aZ 4 Come ts. ciu 4 1
Reviewed by: Date: �34 e e n
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' FACT SHEET FOR WASTELOAD ALLOCATION
Request# 6325
Facility Name: College Park Subdivision
NPDES No.: NCO033421
Type of Waste: Domestic- 100%
Facility Status: Existing
Permit Status: Renewal
Receiving Stream: Little Long Creek
Stream Classification: C
Subbasin: 03-08-36
County: Gaston Stream Characteristic:
Regional Office: Moores ' e Regional Office USGS # 214467095
Requestor: Angela Y.Griffin Date: 1986
Date of Request: 6/28/91x C. P Drainage Area(mi2): 4.03
DE
Topo Quad: F14SW nr T or NAT Summer 7Q10(cfs): 0.3
co�• .d ,r , r.c�sWinter 7Q10(cfs): 0.8
�'r:I.0P,,,jty Average Flow (cfs): 4.8
30Q2(cfs): 1.0
1 5 1991 IWC(%): 10.21
Wasteload Allocation Summary , OFFICE
(approach taken,correspondence with region,EPA,etc.) .
FarA;& 1*// 1-tt UtAl.-Li yy 0jt&y o4i -7w'
Special Schedule Requirements and additional comments from Reviewers:
,�e��res �1„G ,,, fete Iv* .. til gat
Recommended by: Daze: • `� -
Reviewed by �
Instream Assessment: Date: 9.
N
Regional Supervisor: Date:
Permits&Engineering: Date: r -�91
SEP 10 1951
RETURN TO TECHNICAL SERVICES BY:

2
• ' CONVENTIONAL PARAMETERS
Existing Limits:
Monthly Average
Summer Winter
Wasteflow (MGD): 0.022 0.022
BOD5 (mg/1): 30.0 30.0
NH3N (mg/1):
DO(mg/1):
TSS (mg/1): 30.0 30.0
Fecal Col. (/100 ml): 1000.0 1000.0
pH (SU): 6.0-9.0 6.0-9.0
Residual Chlorine (µg/1):
Oil&Grease(mg/1):
TP(mg/1):
TN(mg/1):
Recommended Limits:
Monthly Average with Monthly Average with
Toxicity Test Ammonia Limit
Summer Winter Summer Winter WQ or EL
Wasteflow (MGD): 0.022 0.022
BOD5(mg/1): 30.0 30.0
NH3N (mg/1): 7.9** monitor WQ,AT
DO(mg/1):
TSS (mg/1): 30.0 30.0
Fecal Col. (/100 ml): 200.0 200.0
pH (SU): 6.0-9.0 6.0-9.0
Residual Chlorine (µg/1):
Oil&Grease(mg/1):
TP(mg/1):
TN(mg/1):
Toxicity test(P/F):
** Facility should be given a choice between the recommended limit for NH3-N or
a year-round quarterly toxicity test at 10%. Cc row��/cerio�pp4�h.tG�
Limits Changes Due To: Parameter(s) Affected
Change in 7Q10 data
Change in stream classification
Relocation of discharge
Change in wasteflow
Other(onsite toxicity study,interaction,etc.)
Instream data
New regulations/standards/procedures X Fecal Col., NH3-N
New facility information
X Parameter(s) are water quality limited. For some parameters, the available load capacity of
the immediate receiving water will be consumed. This may affect future water quality based
effluent limitations for additional dischargers within this portion of the watershed.
OR
No parameters are water quality limited,but this discharge may affect future allocations.

• 3
• ' INSTREAM MONITORING REQUIREMENTS
Upstream Location:
Downstream Location:
Parameters:
Special instream monitoring locations or monitoring frequencies:
MISCELLANEOUS INFORMATION&SPECIAL CONDITIONS
Ad .quacy of Existing Treatment
Has the facility de strated the ability to meet the proposed new limits with existing treatment
facilities? YesyNo
If no,which parameters cannot be met?
Would a"phasing in"of the new limits be appropriate?Yes No
If yes,please provide a schedule (and basis for that schedule) with the regional
office recommendations:
If no, why not?
7ri� S s t-Yc, a�i 1
Special Instructions or Conditions
Wasteload sent to EPA? (Major) (Y or N)
(If yes,then attach schematic,toxics spreadsheet,copy of model,or,if not modeled, then old
assumptions that were made,and description of how it fits into basinwide plan)
Additional Information attached? (Y or N) If yes,explain with attachments.

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• College Park Subdivision--Little Long Creek
SUMMER
Residual Chlorine Ammonia as NH3
7Q10 CFS 0.3 7010 CFS 0.3
DESIGN FLOW MGD 0.022 DESIGN FLOW MGD 0.022
DESIGN FLOW CFS 0.0341 DESIGN FLOW CFS 0.0341
STREAM STD UG/L) 17.0 STREAM STD MG/L) 1.0
UPS BACKGROUND LEVEL UG/L) 0 UPS BACKGROUND LEVEL MG/L) 0.22
IWC % 10.206525 IWC % 10.20652
Allowable Concentration(ug/1) 166.56012 Allowable Concentration(mg/1) 7.86217
WINTER
Ammonia as NH3
7010 CFS 0.8
DESIGN FLOW MGD 0.022
DESIGN FLOW CFS 0.0341
STREAM STD MG/L) 1.8
UPS BACKGROUND LEVEL MG/L) 0.22
IWC % 4.088239
Allowable Concentration(mg/1) 38.86745
NCO033421 NJB 8/7/91

co
aNM
State of North Carolina
Department of Environment, Health, and Natural Resources
Division of Environmental Management
512 North Salisbury Street-Raleigh,North Carolina 27604
James G. Martin,Governor George T.Everett,Ph.D.
William W. Cobey,Jr., Secretary Director
Mr. Carl Daniel
Carolina Water Service,Inc.
PO Box 240705
Charlotte,NC 28224
Subject: Chlorine Toxicity
NPDES Permit No. NCO033421
Gaston County
Dear Mr.Daniel
Chlorine,a widely used wastewater disinfectant for the treatment of coliform
organisms,often remains instream in residual amounts that may prove to be toxic under
critical low stream flow conditions. In the last decade,EPA assessed the potential adverse
effects of chlorine to the aquatic environment and has taken steps to reduce the impacts
through the development of federal criteria. In 1986,EPA recommended that all states
have a chlorine standard by their next triennial review of water quality standards.
In revising its water quality standards in 1989, North Carolina developed an action
level for chlorine of 17 ug/l(freshwater classes only). In addition, the fecal coliform limit
was reduced from 1000 colonies/100 ml to 200 colonies/ 100 ml. Under a new DEM
procedure,dechlorination and chlorine limits are now recommended for all new or
expanding dischargers proposing the use of chlorine for effluent disinfection. The
Division is reviewing chlorine levels from all existing dischargers as part of their'NPDES
permit renewal process.
Our records indicate that chlorine from your facility's effluent discharge is
considered toxic to the receiving stream under low flow conditions,i.e., the amount of
chlorine discharged causes a violation of the instream action level for chlorine (17 ug/1 for
chronic effects or 28 ug/l for acute effects) under 7Q10 conditions. An acceptable level of
chlorine in your effluent is 28 ug/1 or 0.028 mg/l. Action should be taken to reduce the
effluent concentration of chlorine to an acceptable level. If this level is not feasible, you
should consider dechlorination or alternate methods of disinfection for your facility to
ensure that both chlorine and bacterial limits are met. In addition, if your facility plans to
undertake any phase of construction,dechlorination or alternate disinfection should be
included. However,please note that an authorization to construct must be obtained from
this Division prior to any alteration to your treatment plant.
Pollution Prevention Pays
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone]
An Equal Opportunity Affirmative Action Employer

-2-
The Division is currently reviewing its water quality regulations pertaining to
chlorine. In the future,effluent limits and/or dechlorination may be required of existing
facility's with chlorine problems. If the chlorine levels in your facility's effluent remain
unchanged,a chlorine limit or a whole effluent toxicity testing requirement may be added
to your permit limitations.
Please feel free to call Rex Gleason of the Division's Regional Office at(704) 663-
1699 if you have any questions or comments regarding this issue.
Sincerely,
Steve Tedder
Water Quality Section Chief
SWT/njb
cc: Mooresville Regional Office
Central Files
Pollution Prevention Pays
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone]
An Equal Opportunity Affirmative Action Employer

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�'CAROLINJ�Wl4" R SERVI E.I .otH. � �,�� , �x ti'. .5 a i s
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ANAFFILIATEOF
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Corporate Offices: r ig Carolina;
•� •t.. .—...� �r{wh 4G,W'a'u—•Lrr'�t'.� .�'i'•►�e.Y1•-'��i'} _
2335 Sanders Road s y #; Asheville,NC [phone]
f Northbrook,Illinois 60062 'i Y�i - Banner Elk,-NC [phone]
Telephone:[phone] "'' 4 `y f r Charlotte,NC [phone]
Regional Offices: M.
Morehead City,NC [phone]
5701 Westpark Dr.,Suite 101 =•� ` New Bern,NC [phone]
P.O.Box 2407054 t f�� .",. Whispering Pines,NC (919}949-2010
Charlotte,NC 28224
[phone]
�r
September 23, 1991
Mr . Steve W. Tedder
N.C. Dept . of Environmental Health Natural Resources
0',471 +.
Division of Environmental Management
512 N. Salisbury Street
Raleigh, N.C. 27611 RECEIVED
r.• Y
Ref: Chlorine Toxicity SEP 3 0 1991
NPDES Permi` #NC00.33421
College Park WWTP
Gaston County TEC 1NICAL SUPPORT BRANCH
Dear Mr . Tedder,
We are in receipt of your letter regarding the chlorine toxicity
action level for existing dischargers using chlorine for effluent
disinfection. In your letter it was noted that the above referenced
facility was exceeding a chlorine level of 17 µg`1 in the effluent .
Currently there is no such requirement in our NPDES permit and as
you are aware, this level is impossible to meet without some means
of additional treatment . If the State is requiring us to meet the
17 µg/l limits, please amend our permit to include this change and
we will move forward immediately to comply.
Please be advi_Qed that C arolina T at-er Service -is committed to
meeting all State and Federal regulations within the permit require-
ments, as long as these requirements are uniform throughout the
State and applied to al.'_ effluent dischargers .
If you have any questions regarding this please don 't hesitate to
contact me at this office .
Sincerely,
ISI
Carl Daniel Z 1 :Q1 � _ 130 6
Vice President
CD :tmc

Engineer Date Rec.
NPDES WASTE LOAD ALLOCATION
`7Qlr'� s zo � o
Facility Name: c�_ or� _� cr, CSL.- �t s..�B Pi✓i5•d AJ Date
Existing 9
Proposed O Permit No. : /y C y 3 3 Y3 Pipe No. : v j County:
Design Capacity (MGD) : b a Industrial ( % of Flow) : Domestic ( % of Flow) : l`'
w Receiving Stream: L r f _ L-�rn �� Class: Q, Sub-Basin: c->3 08 J �o
O -
c
a Reference USGS Quad: I LI J w (Please attach) Requestor: L--�5� Regional Office Ale �
(Guideline limitations, if applicable, are to be listed on the back of this form. )
v
Design Temp.: c2� ��� Drainage Area (mit) :_ 03 Avg. Streamf low (cfs)
7Q10 (cfs) _ �. 3 „ Winter 7Q10 (cfs) 0-q 30Q2 (cfs)
Location of D.O. minimum (miles below outfall) : �_ Slope (fpm)
Velocity (fps) : K (base e, per day) : (),�5�(�' r2 °(J K (base e. Der day) : 3,5,3 o25�V
K, 2 r
E
ffluent Monthly Effluent ."onthly
cteristics Average Comments Characteristics !'.verage Comments
> I C)00
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Comments:
IO
Rs locatio0
n PLOTTED
Cation O
Date:
PPre �ed BY Reviewed By:

Request No. :3202
--------------------- WASTELOAD ALLOCATION APPROVAL FORM ---------------------
Facility Name : CAROLINA WATER SERVICE - COLLEGE PARK
Type of Waste : DOMESTIC
Status : EXISTING
Receiving Stream : LITTLE LONG CREEK
Stream Class : C
Subbasin : 030836
� County : GASTON
! Regional Office : MRO Drainage Area (sq mi ) : 4.03
� Requestor : LISA CREECH Summer 7Q10 (cfs) : 0.3
� Date of Request : 8/21/86 Winter 7Q10 (cfs) : 0.8
Quad : F14SW Average Flow (cfs) : 4.8
I _________________________ RECOMMENDED EFFLUENT LIMITS -------------------------
Wasteflow (mgd) : 0.022
� 5-Day BOD (mg/1 ) : 30
Ammonia Nitrogen (mg/1 ) :
Dissolved Oxygen (mg/1 ) :
� TSS (mg/1 ) : 30
Fecal Coliform (#/100ml ) : 1000
pH (SU) : 6-9
---------------------------------- COMMENTS _---_----__--____-_--_-____-__-_-_
Recommended by 3,1"-. -- ---- Date
Reviewed by:
4%
W
1ch -. Support Supervisor ------ Date W
a----s
Regional Supervisor ---fe Date
Permits & Engineering --- 4Y.A Date _fz� ___

---------- MODEL RESULTS ----------
` Discharger : CAROLINA WATER SERVICE - COLLEGE PARK
( Receiving Stream : LITTLE LONG CREEK
----------------------------------------------------------------------
The End D.O. is 7.45 mg/1 .
The End CBOD is 5.41 mg/1 .
, The End NBOD is 0.00 mg/l .
----------------------------------------------------------------------
WLA WLA WLA
DO Min CBOD NBOD DO Waste Flaw
(mg/1 ) Milepaint Reach #� (mg/1 ) (mg/1 ) (mg/1 ) (mgd)
- --- --
----_-
Segment 1 6.73 0.20 1
Reach 1 110 0.00 0.00 0.02200
I �

* MODEL SUMMARY DATA
Discharger : CAROLINA WATER SERVICE -- CSubbasin 030836
Receiving Stream : LITTLE LONG CREEK Stream Class: C
Summer 7010 : 0.3 Winter 7010 : 0.8
Design Temperature: 25.
!LENGTH! SLOPE! VELOCITY 1 DEPTH! K1 1 Ki I K2 1 KE ! KN 1 KN : KNR 1 KNR 1
: Bile I ft/Bi: fps 1 ft !design! 320. !design! 3300 !design! R04 ;design! 90' 1
1 1 1 1 1 1 1 1 1 1 1 1 1
1 1 1 1 1 i 1 1 1 ! 1 1 1
Segment 1 1 2.601 17.601 0.100 1 0.51 1 0.52 1 0.41 1 3.53 1 3.171 0.00 1 0.00 1 0.00 1 0.00 1
Reach 1 1 1 1 ! 1 1 1 : 1 : 1 1 1
------------------------------------------------------ ----------------------------------
I Flow 1 CPOD 1 N13OD 1 D.O. !
: cfs 1 mg/1 1 mg/1 ! mg/1 I
Segment 1 Reach 1
Waste 1 0.034 1110.000 1 0.000 1 0.000
Headwaters! 0.300 1 2.000 1 0.000 1 7.560
Tributary 1 0.000 1 0.000 1 0.000 1 0.000
Runoff 1 0.040 1 2.000 1 0.000 1 7.560
Runoff flow is in cfs/mile

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Seg # 1 Reach # 1 Seg Mi 1 D.O. 1 CBOD 1 NBOD 1 Flow 1
1 1 0.00 6.79 13.02 0.00 0.33
1 1 0.20 6.73 11 .98 0.00 0.34
1 1 0.40 6.74 - 11 .03 0.00 0.35
1 1 0.60 6.79 10. 16 0.00 0.36
1 0.80 6.87 9.37 0.00 0.37
1 1 .00 6.96 8.64 0.00 0.37
1 1 .20 7.05 7.98 0.00 0.38
1 1 .40 7. 14 7.37 0.00 0.39
1 1 .60 7.22 6.82 0.00 0.40
1 1 .80 7.30 6.31 0.00 0.41
1 2.00 7.38 5.84 0.00 0.41
1 2.20 7.45 5.41 0.00 0.42
1 2.40 7.52 5.02 0.00 0.43
1 2.60 7.58 4.66 0.00 0.44
1 Seg # 1 Reach # 1 Seg Mi I D.O. 1 CBDD 1 NBOD 1 Flow 1
1 1 0.00 6.79 13.02 0.00 0.33
1 1 0.20 6.73 11 .98 0.00 0.34
1 1 0.40 6.74 11 .03 0.00 0.35
1 1 0.60 6.79 10. 16 0.00 0.36
1 1 0.80 6.87 9.37 0.00 0.37
1 1 1 .00 6.96 8.64 0.00 0.37
1 1 1 .20 7.05 7.98 0.00 0.38
1 1 1 .40 7. 14 7.37 0.00 0.39
1 1 1 .60 7.22 6.82 0.00 0.40
1 1 1 .80 7.30 6.31 0.00 0.41
1 1 2.00 7.38 5.84 0.00 0.41
1 1 2.20 7.45 5.41 0.00 0.42

NPDES WASTE LOAD ALLOCATION
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l:�:t�:rr_nce USe�S t;uaci: ai o (Please attach) Requestor: �� ar � Regional Office -,
.� .
(Guideline limitations, if applicable, are to be listed on the b8ck of this form.)
Design Temp. : 0150
� —' Drainage Area: ` �� �- �lAvg. Streamflow:
i<<lU. C>•:Z�.� WitiLer 7Q10: _ 30Q2 :
C
Location of D.0.mintmuin (stiles below outfall) : __— __ Slope : - -r1 ot't
' ,1 y (fl)S) KI. (baS . c per day, 200C;) K,) (base C, per day, 200C) �
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Ori1;inwtl. All-oc.iti-on
Re:•ised Allocation Date(s) of Revision(s)
(Please attach previous allocation)
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P epared By: Reviewed By: ��_ _ _� �, Date : _ �$

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Form #001 #69
WASTE LOAD ALLOCATION APPROVAL, FORM
Facility Name: College Park Subdivision ---
County: Gaston Sub-basin: -W 98 wW O 16
Regional Office: Mooresville Requestor: Thurman Horne
Type of Wastewater: Industrial
Domestic 00
If industrial, specify types) of industry:
Receiving stream: Little Long Creek Class: C
Other stream(s) affected: Class:
7Q10 flow at point of discharge: 0.2 CTS-
30Q2
S30Q2 flow at point of discharge:
Natural stream drainage area at discharge point: 4.2 Q-
Recommended Effluent Limitations
Monthly Avg. Yj
BOD5 = 30 mg/1
'" 20 1981
TSS = 30 mg/l
Fecal Coliform = 1000#/100 ml PERMITS AND
pH = 6-9 SU ENGINEERING
Flow = 0.022 MGD
This allocation is: /X / for a proposed facility
F/ for a new (existing) facility
F/ a revision of existing limitations
F/ a confirmation of existing limitations
Recommended and eviewed by:
Date:
Head, Techncia1 Services Branch Date:
Reviewed by:
Regional Supervisor Date: X-tel
Permits Manager Date: .s?-s
Approved by:
Division Director Date: P

DATE:
DATE ALLOCATION NEEDED:
MEMORANDUM
TO: Mike McGhee
Technical Services Branch
FROM: e� ve('Ca S
SUBJECT: Effluent Limits for NPDES Permit
DISCHARGER: ;py7p6j-e
COUNTY: ur.
SUB-BASIN:
RECEIVING STREAM: (f/a
PIP,7Q10 FLOW: �•y�_�,QWNAGE�)REA 1_1 ELEVATION 2 3 3
w
LOCATION OF DISCHARGE: '
DESIGN CAPACITY: A, 660
MAXIMUM MONTHLY MEAN EFFLUENT LIMITS:
PARAMETER
UOD
P 30,9 It WNIA AS N -
TSS 30,/1-
FECAL
o iFECAL COLIFORM
TEMPERATURE fb
D.O. -
*INDICATE PARAMETERS TO BE COVERED

r �
ASSIMILATIVE CAPACITY EVALUATION
LEVEL "B" ANALYSIS
SOURCE OF POLLUTION: 1 trE /�qR K, _�;e.8-a vis I o IJ
Areawide (208) Planning Area:
Facilities (201) Planning Area:C" of
C U
A. RECEIVING STREAM 41 TTLE Loot? C
.2Z S Classification:
7/10 Flow (Qs): 0.2
B. ASSIMILATIVE_CAPACITY DATA
Water Surface Slope (ft/mi)
Stream Velocity (fps) 0, mss♦
S Stream Depth (ft) 0.17
,S Elevation @ Discharge Pt. (ft) I&
O
k` _ �,S I •3 S t I,� .31 (.133) = ( Drainage Area (sq. mi.)
7/10 Yield (cfsm) •b49
Design TemperatureoC) zS-
Groundwater Runoff cfs/mi 0.o I
Deoxygenatiea Rate KI Base e) 1.
Reaeration Rage (K2 Base e) -1 3
Z. Min. Daily Avg. D.O. (mg/1) Sia
l J C. REQUIRED EFFLUENT LIMITS_
Design Flow (MGD) D• /6
BOD5 (mg/1)
Ammonia Nitrogen (mg/1) '
Dissolved Oxygen (mg/1)
Total Suspended Solids (mg/1) 3
Fecal Coliform (#/100 ml) 10 0 0
pH (S.U.)
D. COMMENTS
1)0
-7t SAT
Dos = �,
500
400
300
200
4
0 so
'SO
e 40
o
30
W
20
toy sol oZ ,a3
Design Flow (m d)
STATE OF NORTH CAROLINA DEPARTMENT OF NATURAL AND ECONOMIC RESOURCES
FIRST ATE PAGE SECOND UPDATE THIRD UPDATE
.lar G7$ 36