NC0026913_Instream Assessment_19940311

NPDES DOCUMENT SCANNING COVER SHEET
NC0026913
Sparta WWTP
NPDES Permit:
Document Type:
Permit Issuance
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Correspondence
Owner Name Change
Meeting Notes
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Document Date:
March 11, 1994
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31 i'4la4,
K;, e `-lh iout, Co J -
I�IeC hanctIe. 7dr
rece,v)4lLA do ,spc For
Division of Environmental Management -r 31a5
Water Quality Section
MEMORANDUM
March 11, 1994
TO: Ruth Swanek
THROUGH: Steve Mauney
FROM: George Smith 49
SUBJECT: SOC 93-13 Addendum
Town of Sparta
NPDES # NC0026913
Alleghany County
Attached is the Instream Assessment. Upon completion of this
project, itis my understanding that we will schedule a meeting with
the following groups:
Permits & Engineering --- Jeff Bouchelle
Pretreatment Unit Jeff Poupart
Regional Office Jim Johnston
If you have any question please give me a call.
cc: WSRO

Request Form for In -stream Assessment for 67B
NAME OF FACILITY TOtiVAl OF Sp ? 1T
COUNTY E(7-U N y REGION
RECEIVING STREAM L.I TTLF R\ v R
(rC ;‘
1/USR0
SUBBASIN (`) 1 '-Q 7--O3
DESIGN FLOW Q. 2.5o P? -L
BACKGROUND DATA :
A. Why is SOC needed? (Facility is out of compliance with which
effluent limits?) nay
B. History of SOC requests:
1. Monthly Average waste flow
prior to any SOC
Time period averaged
/I?
_____O. a 3
mgd
I? (3thru4deat2.11.14_11121
2. Previously approved SOC's:
Date: O/-27-R'1 flow: OeC.SO mgd
Date: flow: mgd
total of previously approved SOC flow: O.O 5 D mgd
3. Flows lost from plant flow: mgd
(facilities that have gone
off line)
4. Current SOC request
5. Total plant flow post-SOC
(sum of original flow and
SOC flow minus losses)
flow: 0,O7 mgd
flow: 0. 31a mgd
6. Is this an accurate flow balance for plant? Why/why not?
0 024- 6-12- XS-4)47 ZL
• _euviit,i- osgoo G. 0 AA-j. pe-su—)
2) cf5)4,O.43O t4 Ap aI
aeA 0. 37ri)G-rb (tett) .
.21k, 1..cdaj, et414 PI"

C. Please attach DMR summary for past year for all permitted parame-
ters. If possible, include reports from previous years if
facility has been under SOC for more than a year.
CURRENT,SOC REQUEST : -
A. Request is for domestic or industrial waste? If it is a combin-
ation, please specify percentages.
O1D25 MG-n
O4 j00 ni 0
B. What type of industry? Please attach any pertinent data.
Q
C. The region proposes the following SOC limits:
BOD5 0, b mg/1
NH3 mg/1
DO mg/1
TS S 3 0 0 mg/1
fecal coliform Z.0010 t/100m1
PH G+O '0
SD
other parameters_`____
D. What is the basis for these limits? L

State of North Carolina
Department of Environment,
Health and Natural Resources
Division of Environmental Management
James B. Hunt, Jr., Governor
Jonathan B. Howes, Secretary
A. Preston Howard, Jr., P.E., Director
September 30, 1993
T. Robert Lyons
1125 E. Morehead Suite 210
Charlotte, North Carolina 28204
Subject: Town of Sparta Industrial Pretreatment
Alleghany County
NPDES # NC0026913
�EHNF
RECEIVED
N.C. Dept. of EHNR
OCT 0719R3
Winston-Salem
Regional Office
Dear Mr. Lyons
The Pretreatment Group of the Division of Environmental Management has reviewed the
information supplied by you in a conversation with Jeff Poupart on September 24, 1993..
The necessity for pretreatment and other regulatory requirements for the proposed Bristol
Compressors facility were discussed. The conversation also included the following
predicted pollutant concentrations based on current effluent from similar facilities located in
other states:
Parameter
Aluminum
Arsenic
Cadmium
Chromium
Copper
Iron
Lead
Mercury
Nickel
Silver
Zinc
Untreated Concentration
mg/1
2.94
.005
.045
1.25
1.63
.76
<.0005
.71
.01
5.64
Treated Concentration
mg/1
.25
<.0033
<.01
.084
.14
3.52
<.05
<.0005
.045
<.01
1.03
North Carolina General Statue 143-215.67 prohibits the discharge of wastes to a waste
disposal system in excess of the adequate treatment capacity of the system. A headworks
analysis(HWA) is used to predict the treatment capacity of a facility for various pollutants.
A HWA(enclosed) was completed for the Town of Sparta WWTP based on flow adjusted
site specific monitoring, best professional judgment and EPA default values. Domestic
(uncontrollable) concentrations were assumed at zero for the metals. Site specific data or
EPA default values for domestic concentrations may be inserted at a later time and use of
values other than zero would result in a smaller allowable industrial load than determined
here.
The EPA has promulgated new sludge regulations(copy enclosed) 40 CFR 503 which may
affect available loadings. These regulations have a compliance date of February 19, 1994.
These regulations include ceiling concentrations which sludge for disposal must not
exceed. Sufficient data analysis has not been completed to determine if the sludge ceiling
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled/ 10% post -consumer paper

concentrations can be accurately predicted by the HWA. A draft HWA that includes
ceiling concentration calculations has been completed and enclosed for information
purposes only.
Based on the HWA without considering compliance with sludge ceiling concentrations We
conclude that pretreatment of the proposed industrial user's discharge will be necessary. It
appears that the predicted concentrations of lead and zinc without pretreatment may cause
inhibition of the WWTP. It does not appear that the predicted concentrations after
pretreatment will present a problem with environmental compliance.
Since this facility will be discharging in excess of 50,000 gallons per day they will be
considered a significant industrial user (S IU) and will be required to obtain a permit in
accordance with 15A NCAC 2H.0903. Therefore, pretreatment program development will
be required by the Town of Sparta. Program development requirements are covered in the
enclosed pretreatment rules. Further guidance regarding development is available from
the Division upon request.
If you have any questions or comments or need assistance concerning pretreatment please
feel free to contact Jeff Poupart or Julia Storm at [phone]
JOP/Spar info.001
cc Vim JohnstonWSRO
Central Files
Pretreatment Files
Attachments:
HWA without ceiling concentrations
HWA with ceiling concentrations
40 CFR part 503
15A NCAC 2H.0900
Allocation Table with pretreatment
Allocation Table without pretreatment
Since
.a ---
Steve W. Tedder, Chief
Water Quality Section

MODEL RESULTS
Discharger : TOWN OF SPARTA
Receiving Stream : LITTLE RIVER
SUMMER
MODEL @ EXPANSION FLOW OF 0.6
MGD W/ NH3 TOX LIMIT
The End D.O. is 8.15 mg/l.
The End CBOD is 8.75 mg/l.
The End NBOD is 3.88 mg/l.
WLA WLA WLA
DO Min CBOD NBOD DO Waste Flow
(mg/1) Milepoint Reach # (mg/1) (mg/1) (mg/1) (mgd)
Segment 1 7.06 0.00 1
Reach 1 96.00 41.85 0.00 0.60000

a .
*** MODEL SUMMARY DATA ***
.IZischarger : TOWN OF SPARTA Subbasin : 050703
Receiving Stream : LITTLE RIVER Stream Class: C
Summer 7Q10 : 9.9 Winter 7Q10 : 14.8
Design Temperature: 23.0
ILENGTHI SLOPE' VELOCITY I DEPTH' Kd 1 Kd I Ka 1 Ka I KN I
1 mile 1 ft/mil fps I ft 'design' @20'' 'design' @20' Idesignl
1 1 1 1 1 1 1 1 1 I
Segment 1 1 2.701 19.501 0.415 ) 1.32 1 0.35 10.31 111.23 1 10.521 0.38 I
Reach 1 1 1 1 1 1 1 1 1 1
I Flow 1 CBOD I NBOD I D.O. 1
cfs I mg/1 1 mg/1 1 mg/1 I
Segment 1 Reach 1
Waste 1 0.930 196.000 1 41.850 I 0.000
Headwaters) 9.900 I 2.000 1 1.000 I 7.720
Tributary ) 0.000 1 2.000 1 1.000 1 7.720
* Runoff 1 0.000 1 2.000 1 1.000 1 7.720
* Runoff flow is in cfs/mile

SUMMER
MODEL @ EXPANSION FLOW OF 0.6
MGD W/ NH3 TOX LIMIT
L Seg # I Reach # I Seg Mi I D.O. I CBOD I NBOD I Flow I
1 1 0.00 7.06 10.07 4.51 10.83
1 1 0.10 7.22 10.02 4.48 10.83
1 1 0.20 7.35 9.97 4.46 10.83
1 1 0.30 7.47 9.92 4.43 10.83
1 1 0.40 7.57 9.86 4.41 10.83
1 1 0.50 7.65 9.81 4.38 10.83
1 1 0.60 7.73 9.76 4.36 10.83
1 1 0.70 7.79 9.71 4.34 10.83
1 1 0.80 7.84 9.66 4.31 10.83
1 1 0.90 7.88 9.61 4.29 10.83
1 1 1.00 7.92 9.56 4.26 10.83
1 1 1.10 7.96 9.51 4.24 10.83
1 1 1.20 7.98 9.46 4.22 10.83
1 1 1.30 8.01 9.41 4.19 10.83
1 1 1.40 8.03 9.37 4.17 10.83
1 1 1.50 8.05 9.32 4.15 10.83
1 1 1.60 8.06 9.27 4.12 10.83
1 1 1.70 8.08 9.22 4.10 10.83
1 1 1.80 8.09 9.17 4.08 10.83
1 1 1.90 8.10 9.13 4.06 10.83
1 1 2.00 8.11 9.08 4.03 10.83
1 1 2.10 8.12 9.03 4.01 10.83
1 1 2.20 8.12 8.98 3.99 10.83
1 1 2.30 8.13 8.94 3.97 10.83
1 1 2.40 8.13 8.89 3.94 10.83
1 1 2.50 8.14 8.85 3.92 10.83
1 1 2.60 8.14 8.80 3.90 10.83
1 1 2.70 8.15 8.75 3.88 10.83
I Seg # I Reach # I Seg Mi I D.O. I CBOD I NBOD I Flow I

•
MODEL RESULTS
Discharger : TOWN OF SPARTA
Receiving Stream : LITTLE RIVER
WINTER
MODEL @ EXPANSION FLOW OF 0.6
MGD W/ NH3 TOX LIMIT (27 MG/L)
The End D.O. is 10.37 mg/l.
The End CBOD is 7.23 mg/l.
The End NBOD is 7.85 mg/1.
WLA WLA WLA
DO Min CBOD NBOD DO Waste Flow
(mg/1) Milepoint Reach # (mg/1) (mg/1) (mg/1) (mgd)
Segment 1 9.13 0.00 1
Reach 1 96.00 121.00 0.00 0.60000

*** MODEL SUMMARY DATA ***
discharger : TOWN OF SPARTA Subbasin : 050703
Receiving Stream : LITTLE RIVER Stream Class: C
Summer 7Q10 : 9.9 Winter 7Q10 : 14.8
Design Temperature: 12.0
!LENGTH' SLOPE! VELOCITY 1 DEPTH' Kd 1 Kd 1 Ka 1 Ka 1 KN 1
1 mile 1 ft/mil fps 1 ft (design) @204 'design! @201/2 'design!
I I I I I 1 1 1 1 I
Segment 1 1 1.701 19.501 0.549 1 1.38 1 0.23 1 0.34 111.70 1 13.921 0.1.6 I
Reach 1 1 1 1 1 1 I 1 1 1 I
1 Flow 1 CBOD 1 NBOD I D.O. I
cfs I mg/1 1 mg/1 1 mg/1 1
Segment 1 Reach 1
Waste 1 0.930 1 96.000 1121.000 1 0.000
Headwaters) 14.800 1 2.000 1 1.000 I 9.700
Tributary I 0.000 1 2.000 I 1.000 I 9.700
* Runoff 1 0.000 I 2.000 I 1.000 I 9.700
* Runoff flow is in cfs/mile

c WINTER
MODEL @ EXPANSION FLOW OF 0.6
MGD W/ NH3 TOX LIMIT (27 MG/L)
-1. Seg # I Reach # I Seg Mi I D.O. I CBOD 1 NBOD I Flow I
1 1 0.00 9.13 7.56 8.09 15.73
1 1 0.10 9.30 7.54 8.08 15.73
1 1 0.20 9.45 7.52 8.07 15.73
1 1 0.30 9.58 7.50 8.05 15.73
1 1 0.40 9.69 7.48 8.04 15.73
1 1 0.50 9.79 7.46 8.02 15.73
1 1 0.60 9.88 7.44 8.01 15.73
1 1 0.70 9.96 7.42 7.99 15.73
1 1 0.80 10.03 7.40 7.98 15.73
1 1 0.90 10.09 7.38 7.96 15.73
1 1 1.00 10.14 7.36 7.95 15.73
1 1 1.10 10.19 7.35 7.94 15.73
1 1 1.20 10.23 7.33 7.92 15.73
1 1 1.30 10.27 7.31 7.91 15.73
1 1 1.40 10.30 7.29 7.89 15.73
1 1 1.50 10.33 7.27 7.88 15.73
1 1 1.60 10.35 7.25 7.86 15.73
1 1 1.70 10.37 7.23 7.85 15.73
I Seg # I Reach # I Seg Mi I D.O. I CBOD I NBOD I Flow I

USGS weighted low flow estimate procedure
FacilityLSPARTA i
Region
DA_LFPR
s7Q10_LFPR
DA_new
MAR
QA_eq
HA10
0
NPDES # 26913 I Stream LITTLE R. _ J
sq mile
0 cfs
.._____34_.._.._...
1.8
61.20
sq mile
cfs/sq mile
cfs
STEP 1 calculate drainage area ratio
NOTE: procedure applies for regions HA3, HA5,
HA9, and HA10, else see flow SOP
RATIO = new drainage area
drainage area at gage
IF 0.25 < RATIO < 4, CONTINUE to STEP 2, ELSE too far from gage
#DIV/0!
STEP 2 determine weight of gage (weight_LFPR)
A. RATIO < 1 B. RATIO > 1
weight ratio weight ratio
0 1 0 1
1 #DIV/0! 1 #DIV/0! 1 €__ #DIV/0! #DIV/0!
1 0.25 1 4
STEP 3
HA3
HA5
HA9
HA10
STEP 4
weight =
#DIV/0!
calculate 7Q10_EQ using regional equation
9.94
1.27
1.27
9.88
cfs
cfs
cfs
cfs
7Q10 EQ =
calculate 7010 yield using weighted equation
9.88
7Q10yield = [weight_LFPR * 7Q10_LFPR] + [weight_EQ * 7Q10_EQ]
cfs
= 52IV/011
DA_LFPR DA_new
yield = #DIV/0! + #DIV/0!
STEP 5 calculate s7Q10
7010 = 7Q10yield * DA_new
#DIV/0!
cfs/sq mile

USGS weighted low flow estimate procedure
summer 7Q10 =
#DIV/0!
cfs
FacilityISPARTA i
Region
DA_LFPR
w7Q10_LFPR
DA_new
MAR
QA_eq
STEP 1
_----HA10.---.
0
0
•
NPDES # 126913 1 Stream LITTLE R. 1
sq mile
cfs
34 sq mile
cfs/sq mile
cfs
1.8
61.20
calculate drainage area ratio
NOTE: procedure applies for regions HA3, HA5,
HA9, and HA10, else see flow SOP
RATIO = new drainage area
drainage area at gage
IF 0.25 < RATIO < 4, CONTINUE to STEP 2, ELSE too far from gage
#DIV/0!
STEP 2 determine weight of gage (weight_LFPR)
A. RATIO < 1 B. RATIO > 1
weight ratio weight ratio
0 1 0 1
#DIV/0! r #DIV/0!
STEP 3
HA3
HA5
HA9
HA10
STEP 4
0.25
weight =
#DIV/0!
#DIV/0! • #DIV/0!
1 4
calculate 7010_EQ using regional equation
18.85
4.38
4.38
14.80
cfs
cfs
cfs
cfs
7010_EQ =
calculate 7010 yield using weighted equation
14.80
_ 1..-. #DIV/0!. i
cfs/sq mile
7Q10yield = [weight_LFPR * 7010_LFPR] + [weight_EQ * 7010_EQ]
DA_LFPR DA_new
yield = #DIV/0!
+ #DIV/0!
#DIV/0!
cfs/mile

USGS weighted low flow estimate procedure
STEP 5 calculate w7Q10
7Q10 = 7Q10yield * DA_new
winter 7Q10 =
#DIV/0!
cfs
Facility[SPARTA_ _ t
Region
DA_LFPR
30Q2_LFPR
DA_new
MAR
QA_eq
HA10
0
NPDES # i26913 j Stream'•LITTLE R. 1
sq mile
0 cfs
34 __. . _.. .... _.. _.. _
1.8
61.20
sq mile
cfs/sq mile
cfs
STEP 1 calculate drainage area ratio
NOTE: procedure applies for regions HA3, HA5,
HA9, and HA10, else see flow SOP
RATIO = new drainage area
drainage area at gage
IF 0.25 < RATIO < 4, CONTINUE to STEP 2, ELSE too far from gage
#DIV/0!
STEP 2 determine weight of gage (weight_LFPR)
A. RATIO < 1 B. RATIO > 1
weight ratio weight ratio
0 1 0 1
1 #DIV/0! 1 #DIV/0!
1 0.25 1 4
#DIV/0! 1 #DIV/0! I
STEP 3
HA3
HA5
HA9
HA10
weight =
#DIV/0!
calculate 30Q2_EQ using regional equation
21.04
5.90
5.90
21.05
cfs
cfs
cfs
cfs
3002_EQ =
STEP 4 calculate 3002 yield using weighted equation
21.05
= #DIV/0!_ J
cfs/sq mile
30Q2yield = [weight_LFPR * 3002_LFPR] + [weight_EQ * 3002_EQ]

USGS weighted low flow estimate procedure
Facility[SPARTA _ _.J
Region
DA_LFPR
s7Q10_LFPR
DA_new
MAR
QA_eq
STEP 1
HA10
0
NPDES # i26913 i StreamlLITTLE R. J
sq mile
0 cfs
..
1.8
178.56
sq mile
cfs/sq mile
cfs
calculate drainage area ratio
NOTE: procedure applies for regions HA3, HA5,
HA9, and HA10, else see flow SOP
RATIO = new drainage area =
drainage area at gage
IF 0.25 < RATIO < 4, CONTINUE to STEP 2, ELSE too far from gage
#DIV/0!
STEP 2 determine weight of gage (weight_LFPR)
A. RATIO < 1 B. RATIO > 1
weight ratio weight ratio
0 1 0 1
#DIV/0! I #DIV/0!
1 0.25 1 4
#DIV/O! 1 #DIV/0!
STEP 3
HA3
HA5
HA9
HA10
STEP 4
weight =
#DIV/0!
calculate 7Q10_EQ using regional equation
25.79
2.24
2.24
29.15
cfs
cfs
cfs
cfs
7Q10 EQ =
calculate 7Q10 yield using weighted equation
29.15
7Q10yield = [weight_LFPR * 7Q10_LFPR] + [weight_EQ * 7Q10_EQ]
cfs
I #DIV/0!
DA_LFPR DA_new
yield = #DIV/0! + #DIV/01
STEP 5 calculate s7Q10
7010 = 7Q10yield * DA_new
#DIV/0!
cfs/sq mile

USGS weighted low flow estimate procedure
summer 7010 =
#DIV/01
cfs
Facility
SPARTA
Region
DA_LFPR
w7Q10_LFPR
DA_new
MAR
QA_eq
STEP 1
0
0
NPDES # 126913 1 Stream?LITTLE R.
sq mile
cfs
_.._.•99.2 sq mile
1.8 cfs/sq mile
_.•-178.56 cfs
calculate drainage area ratio
NOTE: procedure applies for regions HA3, HA5,
HA9, and HA10, else see flow SOP
RATIO = new drainage area
drainage area at gage
IF 0.25 < RATIO < 4, CONTINUE to STEP 2, ELSE too far from gage
#DIV/0!
STEP 2 determine weight of gage (weight_LFPR)
A. RATIO < 1 B. RATIO > 1
weight ratio weight ratio
0 1 0 1
#DIV/0! i #DIV/0!
1 0.25 1 4
#DIV/0! #DIV/0!
STEP 3
HA3
HA5
HA9
HA10
STEP 4
weight =
#DIV/0!
calculate 7Q10_EQ using regional equation
49.42
10.20
10.20
42.72
cfs
cfs
cfs
cfs
7Q10 EQ =
calculate 7Q10 yield using weighted equation
42.72
cfs/sq mile
7Q10yield = [weight_LFPR * 7Q10_LFPR] + [weight_EQ * 7Q10_EQ]
DA_LFPR DA_new
yield = #DIV/0!
+ #DIV/0!
#DIV/0!
#DIV/0!
cfs/mile

USGS weighted low flow estimate procedure
STEP 5 calculate w7Q10
7Q10 = 7Q10yield * DA_new
winter 7010 =
#DIV/0!
cfs
Facility1SPARTA _ _ 1 NPDES #
Region
DA_LFPR
30Q2_LFPR
DA_new
MAR
QA_eq
HA10
0
sq mile
0 cfs
99.2
1.8
178.56
sq mile
cfs/sq mile
cfs
STEP 1 calculate drainage area ratio
`2691._.._.._.._.1
StreamiLITTLE R.
NOTE: procedure applies for regions HA3, HA5,
HA9, and HA10, else see flow SOP
RATIO = new drainage area
drainage area at gage
IF 0.25 < RATIO < 4, CONTINUE to STEP 2, ELSE too far from gage
#DIV/0!
STEP 2 determine weight of gage (weight_LFPR)
A. RATIO < 1 B. RATIO > 1
weight ratio weight ratio
0 1 _ 0 1
r #DIV/0! #DIV/0!
1 0.25 1 4
r #DIV/0! 1 #DIV/0!
STEP 3
HA3
HA5
HA9
HA10
weight =
#DIV/0!
calculate 30Q2_EQ using regional equation
55.75
14.35
14.35
61.42
cfs
cfs
cfs
cfs
30Q2_EQ =
STEP 4 calculate 3002 yield using weighted equation
61.42
= _.. #DIV/O!,_..i
cfs/sq mile
30Q2yield = [weight_LFPR * 3002_LFPR] + [weight_EQ * 3002_EQ]

Page 1
Note for Jackie Nowell
From: Don Safrit
Date: Thu, Jan 20, 1994 3:43 PM
Subject: RE: Sparta
To: Jackie Nowell
Be prepared to provide an updated instream assessment for the SOC since this modification is
probably going to come in. The overall flow may still remain at .375, only the allowable
interim additions will increase (50K to 100K).
In the near future they will be submitting an expansion request to probably .600 MGD - total.
Thanks, Don
From: Jackie Nowell on Thu, Jan 20, 1994 3:39 PM
Subject: Sparta
To: Don Safrit
I've looked at expansion flows of 0.050 & 0.100 MGD for Sparta and preliminary modeling
shows that the Little River can accept the additional flow for oxygen consuming wastes. The
facility would also have summer ammonia toxicity limits at both Qws, in addition to a
chlorine limit.
It should be especially noted that the New River Basin Management Plan is due in 1995.
Juan has already started the preliminary work and he told me to mention to you that a strategy
to protect the Little River and its downstream HQW segment will probably be developed.
The Town may have to meet more stringent limits for toxicants and metals, if a strategy
similar to the ORW is done. None of this has been decided yet but it is a possibility. We
also have to review the >50% IWC procedure in this case also.
Please contact if questions.

wj = 235
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T
lW
4,4-k /. j
ithlr
l
zo 4* I sf) t Z. 9, Z
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2?, d5'
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6.376 k /,SSJ 7'f — #0lG * /v0 4 6 7�
o,�ar /, sr zq.

SPARTA WWTP @ 0.300 MGD
Residual Chlorine
7010 (CFS)
DESIGN FLOW (MGD)
DESIGN FLOW (CFS)
STREAM STD (UG/L)
UPS BACKGROUND LEVEL (UG/L)
IWC (%)
Allowable Concentration (ug/I)
Fecal Limit
Ratio of 21.3 :1
Ammonia as NH3
(summer)
9.9 7010 (CFS)
0.3 DESIGN FLOW (MGD)
0.465 DESIGN FLOW (CFS)
17.0 STREAM STD (MG/L)
0 UPS BACKGROUND LEVEL (MG/L)
4.49 IWC (%)
378.94 Allowable Concentration (mg/1)
Ammonia as NH3
(winter)
7010 (CFS)
200/1o0m1 DESIGN FLOW (MGD)
DESIGN FLOW (CFS)
STREAM STD (MG/L)
UPS BACKGROUND LEVEL (MG/L)
iWC (%)
Allowable Concentration (mg/1)
9.9
0.3
0.465
1.0
0.22
4.49
17.61
14.8
0.3
0.465
1.8
0.22
3.05
52.09
NC0026913
1/21/94

iIz19`f
SUMMER
SPARTA EXP. TO 0.300 MGD
MODEL RESULTS
Discharger : TOWN OF SPARTA
Receiving Stream : LITTLE RIVER
The End D.O. is 8.30 mg/1.
The End CBOD is 3.99 mg/1.
The End NBOD is 3.91 mg/1.
Segment 1
Reach 1
WLA WLA WLA
DO Min CBOD NBOD DO Waste Flo
(mg/1) Milepoint Reach # (mg/1) (mg/1) (mg/1) (mgd)
7.37 0.00 1
60.00 80.60 0.00 0.30000

*** MODEL SUMMARY DATA ***
Discharger : TOWN OF SPARTA Subbasin : 0507
Receiving Stream : LITTLE RIVER Stream Class: C
Summer 7Q10 : 9.9 Winter 7Q10 : 14.8
Design Temperature: 23.0
'LENGTH' SLOPE' VELOCITY 1 DEPTHI Kd 1 Kd 1 Ka I Ka 1 KN 1 KN I KNR 1 KNR I SOD 1 SOD 1
I mile I ft/mil fps 1 ft 'design' @20 'design' @20 'design' @20 'design' 020 'design' @20 I
1 1 1 1 I I I 1 1 I 1 I I I I
Segment 1 I 2.701 19.501 0.402 1 1.31 1 0.35 10.30 110.87 1 10.181 0.38 1 0.30 1 0.38 1 0.00 1 0.00 10.00
Reach 1 I 1 1 1 I 1 1 1 I 1 1 1 I
I Flow 1 CBOD 1 NBOD 1 D.O. I
I cfs 1 mg/1 1 mg/1 1 mg/1 I
Segment 1 Reach 1
Waste I 0.465 160.000 1 80.600 I 0.000
Headwaters) 9.900 I 2.000 1 1.000 1 7.720
Tributary I 0.000 1 2.000 1 1.000 I 7.720
* Runoff I 0.000 1 2.000 1 1.000 I 7.720
* Runoff flow is in cfs/mile

SUMMER
SPARTA EXP. TO 0.300 MGD
I Seg # I Reach # 1 Seg Mi 1 D.O. I CBOD I NBOD I Flow I
1 1 0.00 7.37 4.60 4.57 10.37
1 1 0.10 7.51 4.58 4.54 10.37
1 1 0.20 7.63 4.55 4.52 10.37
1 1 0.30 7.73 4.53 4.49 10.37
1 1 0.40 7.81 4.51 4.47 10.37
1 1 0.50 7.88 4.48 4.44 10.37
1 1 0.60 7.94 4.46 4.42 10.37
1 1 0.70 8.00 4.43 4.39 10.37
1 1 0.80 8.04 4.41 4.37 10.37
1 1 0.90 8.08 4.39 4.34 10.37
1 1 1.00 8.11 4.36 4.32 10.37
1 1 1.10 8.14 4.34 4.29 10.37
1 1 1.20 8.16 4.32 4.27 10.37
1 1 1.30 8.18 4.29 4.24 10.37
1 1 1.40 8.20 4.27 4.22 10.37
1 1 1.50 8.21 4.25 4.19 10.37
1 1 1.60 8.23 4.23 4.17 10.37
1 1 1.70 8.24 4.20 4.15 10.37
1 1 1.80 8.25 4.18 4.12 10.37
1 1 1.90 8.26 4.16 4.10 10.37
1 1 2.00 8.26 4.14 4.07 10.37
1 1 2.10 8.27 4.12 4.05 10.37
1 1 2.20 8.28 4.09 4.03 10.37
1 1 2.30 8.28 4.07 4.00 10.37
1 1 2.40 8.29 4.05 3.98 10.37
1 1 2.50 8.29 4.03 3.96 10.37
1 1 2.60 8.29 4.01 3.94 10.37
1 1 2.70 8.30 3.99 3.91 10.37
I Seg # I Reach # I Seg Mi I D.O. I CBOD I NBOD I Flow I

SPARTA WWTP @ 0.350 MGD
Residual Chlorine
7010 (CFS)
DESIGN FLOW (MGD)
DESIGN FLOW (CFS)
STREAM STD (UG/L)
UPS BACKGROUND LEVEL (UG/L)
IWC (%)
Allowable Concentration (ug/I)
Fecal Limit
Ratio of 18.2 :1
Ammonia as NH3
(summer)
9.9 7010 (CFS)
0.35 DESIGN FLOW (MGD)
0.5425 DESIGN FLOW (CFS)
17.0 STREAM STD (MG/L)
0 UPS BACKGROUND LEVEL (MG/L)
5.20 IWC (%)
327.23 Allowable Concentration (mgll)
Ammonia as NH3
(winter)
7Q10 (CFS)
200/100m1 DESIGN FLOW (MGD)
DESIGN FLOW (CFS)
STREAM STD (MG/L)
UPS BACKGROUND LEVEL (MG/L)
IWC (%)
Allowable Concentration (mg/I)
9.9
0.35
0.5425
1.0
0.22
5.20
15.23
14.8
0.35
0.5425
1.8
0.22
3.54
44.90
NC0026913
1 /21 /94

r/ae/9 0-
SUMMER
SPARTA EXP. TO 0.350 MGD
MODEL RESULTS
Discharger : TOWN OF SPARTA
Receiving Stream : LITTLE RIVER
The End D.O. is 8.29 mg/l.
The End CBOD is 4.35 mg/l.
The End NBOD is 3.86 mg/l.
WLA WLA WLA
DO Min CBOD NBOD DO Waste Flo
(mg/1) Milepoint Reach # (mg/1) (mg/1) (mg/1) (mgd)
Segment 1 7.32 0.00 1
Reach 1 60.00 68.40 0.00 0.35000

*** MODEL SUMMARY DATA ***
Discharger : TOWN OF SPARTA Subbasin : 0507
Receiving Stream : LITTLE RIVER Stream Class: C
Summer 7Q10 : 9.9 Winter 7Q10 : 14.8
Design Temperature: 23.0
'LENGTH' SLOPE' VELOCITY 1 DEPTHI Kd I Kd I Ka I Ka I KN I. KN I KNR I KNR I SOD I SOD I
I mile I ft/mil fps 1 ft 'design' @20 'design' @20 'design' @20 'design' @20 'design' @20 I
1 1 1 1 1 1 1 I 1 1 1 I
Segment 1 I 2.701 19.501 0.404 1.31 10.35 10.31 110.93 1 10.241 0.38 10.30 10.38 10.00 10.00 10.00 I
Reach 1 I 1 1 1 1 I I 1 I 1 1 I
' Flow I CBOD, I NBOD I D.O. I
I cfs I mg/1 I mg/1 I mg/1 I
Segment 1 Reach 1
Waste 1 0.542 160.000 168.400 1 0.000
Headwaters) 9.900 I 2.000 I 1.000 I 7.720
Tributary 1 0.000 I 2.000 I 1.000 I 7.720
* Runoff 1 0.000 1 2.000 I 1.000 I 7.720
* Runoff flow is in cfs/mile

• + ►
SUMMER
SPARTA EXP. TO 0.350 MGD
Seg # I Reach # I Seg Mi I D.O. I CBOD I NBOD I Flow I
1 1 0.00 7.32 5.01 4.50 10.44
1 1 0.10 7.46 4.99 4.48 10.44
1 1 0.20 7.59 4.96 4.45 10.44
1 1 0.30 7.69 4.93 4.42 10.44
1 1 0.40 7.78 4.91 4.40 10.44
1 1 0.50 7.85 4.88 4.37 10.44
1 1 0.60 7.92 4.86 4.35 10.44
1 1 0.70 7.97 4.83 4.32 10.44
1 1 0.80 8.02 4.81 4.30 10.44
1 1 0.90 8.06 4.78 4.28 10.44
1 1 1.00 8.09 4.75 4.25 10.44
1 1 1.10 8.12 4.73 4.23 10.44
1 1 1.20 8.15 4.70 4.20 10.44
1 1 1.30 8.17 4.68 4.18 10.44
1 1 1.40 8.18 4.65 4.16 10.44
1 1 1.50 8.20 4.63 4.13 10.44
1 1 1.60 8.21 4.61 4.11 10.44
1 1 1.70 8.23 4.58 4.08 10.44
1 1 1.80 8.24 4.56 4.06 10.44
1 1 1.90 8.25 4.53 4.04 10.44
1 1 2.00 8.25 4.51 4.02 10.44
1 1 2.10 8.26 4.49 3.99 10.44
1 1 2.20 8.27 4.46 3.97 10.44
1 1 2.30 8.27 4.44 3.95 10.44
1 1 2.40 8.28 4.41 3.92 10.44
1 1 2.50 8.28 4.39 3.90 10.44
1 1 2.60 8.28 4.37 3.88 10.44
1 1 2.70 8.29 4.35 3.86 10.44
Seg # I Reach # I Seg Mi I D.O. I CBOD I NBOD I Flow I

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09/07/93 ver 3.1 TOX ICS REV I EW
Facility: METAL FINISHER
NPDES Permit No.: NC0099990
Status (E, P, or M) : P
Permitted Flow: 0.1 mgd
Actual Average Flow: 0.1 mgd
Subbasin: '050703
Receiving Stream: BLEDSOE CR I PRETREATMENT DATA 1----EFLLUENT DATA ----
Stream Classification: C-TR I ACTUAL PERMITTEDI
7Q10: 1.6 cfs 1 Ind. + Ind. + 1 FREQUENCY
IWC: 8.99 % I Domestic PERMITTED Domestic 1 OBSERVED of Chronic
Stn'd / Bkg 1 Removal Domestic Act.Ind. Total Industrial Total 1 Eflluent Criteria
Pollutant AL Conc. 1 Eff. Load Load Load Load Load 1 Conc. Violations
(ug/1) (ug/1) 1 it (#/d) (#/d) (#/d) (#/d) (#/d) 1 (ug/1) (#vio/#sam)
Cadmium S 0.4 1 0% 1 I
Chromium S 50.0 1 0% 1 1 I
Copper AL 7.0 1 0% 1 1 N
Nickel S 88.0 1 0% 1 1 P
Lead S 25.0 1 0% 1 1 U
Zinc AL 50.0 1 0% 1 1 T
Cyanide S 5.0 1 0% 1 I
Mercury S 0.012 1 0% 1 1 S
Silver AL 0.06 1 0% 1 1 E
Selenium S 5.00 1 0% 1 I C
Arsenic S 50.00 1 0% 1 1 T
Phenols S NA 1 0% 1 1 I
NH3-N C 1 0% 1 1 0
T.R.Chlor.AL 17.0 1 0% 1 1 N
Pollutant
ALLOWABLE PRDCT'D PRDCT'D PRDCT'D MONITOR/LIMIT I--ADTN'L RECMMDTN'S--
Effluent Effluent Effluent Instream 1 Recomm'd
Conc. using using Conc. Based on Based on Based on 1 FREQUENCY INSTREAM
Allowable CHRONIC ACTUAL PERMIT using ACTUAL PERMITTED OBSERVED 1 Eff. Mon. Monitor.
Load Criteria Influent Influent OBSERVED Influent Influent Effluent 1 based on Recomm'd ?
(#/d) (ug/1) (ug/1) (ug/1) (ug/1) Loading Loading Data 1 OBSERVED (YES/NO)
Cadmium S 1 0.00 4.452 0.000 0.000 0.00 1 1 A
Chromium S 1 0.44 556.452 0.000 0.000 0.00 1 1 N
Copper AL 1 0.06 77.903 0.000 0.000 0.00 1 1 A
Nickel S ( 0.78 979.355 0.000 0.000 0.00 1 1 L
Lead S 1 0.22 278.226 0.000 0.000 0.00 1 1 Y
Zinc AL 1 0.44 556.452 0.000 0.000 0.00 1 1 S
Cyanide S 1 0.04 55.645 0.000 0.000 0.00 1 1 I
Mercury S 1 0.00 0.134 0.000 0.000 0.00 1 1 S
Silver AL 1 0.00 0.668 0.000 0.000 0.00 1 I
Selenium S 1 0.04 55.645 0.000 0.000 0.00 1 1 R
Arsenic S 1 0.44 556.452 0.000 0.000 0.00 1 1 E
Phenols S 1 0.000 0.000 0.000 0.00 1 1 S
NH3-N C 1 0.000 0.00 1 1 U
T.R.Chlor.AL 1 189.194 0.00 Limit 1 1 L
I I I T
I I I S

3.15
the best available technology eco-
ically achievable (BAT):
BAT EFFLUENT LIMITATIQNS
.nt or pollutant propeil y any .1 day
mu
•
average
Monthly
shall not
exceed
Milligrams per titer (mg/0
Cadmiurn
0
Chromlurn
1.76 Copper (n..- ..» :.......:...»....... .
2.07 Lead m
Nickel ..
•
2. g Silver �m� '- ....... ...:»...».:::::• ....:•
0240.65
40 CFR Ch. I (7-1-89 Edition)
PSES FOR ALL PLANTS EXCEPT JOB SHOPS
AND INDEPENDENT PRINTED CIRCUIT BOARD
MANUFACTURERS ' = a'
Pollutant or pollutant Property
0.69
2.77
3.38
0.69
3.98
0.43
2.61
1.20
2.13
,. • • Monthly
Matdmian
4ifor
any 1 day shall
exceed
Milligrams per_lter (mg/0
Alternatively, for industrial fa'
!s with cyanide' treatment, . and
agreement between a source 'sub-
•o those limits and'. the pollution •
of authority, the •following .ame
cyanide limit may apply in place
total cyanide limit specified in
raph (a) of this section:
or pollutant property
Maximum for
any 1 day
Monthly
slab lit ..
exceed
Milligrams per liter (mg/0
A) r-1 0.88
To user subject=to the provisions
i subpart shall' augment the use •
)cess wastewater` • or otherwise
the wastewater *as a'partial or
substitute for 'adequate treat • •
:o achieve compliance with this'
•ion. ...
Pretreatment 't_3tiandards for eiist
sources (PSES). >:; ;.`.T
rixcep as. provided in ' 40, CFR
Lnd 403.13, any existing -source
to this subpart that introduces
nts into a publiclyowned -treat-
corks. must comply with.•40 CFR I
03 and achieve ` the "follo
Wig-
.tment standards for existing
(PSES):
cilities rwith cyanide treatment, . upa-
on
agreement between a source subject to
those .limits and the pollution control
authority. The following amenable cy-
anide limit may apply in place of the
total cyanide limit specified in para-
graph (a) of this section:
0.69
2.77
3.38
0.69
3.98
0.43
2.01
120
2.13
026
1.71
2.07
0.43
2.38
024
1.48
0.65
(b) Alternatively for • industrial f
.tt
Pollutant or pollutant property
Maximum for
any 1 day
Monthly
average
not
exceed
Milligrams per Crter (mg/0
0.86 I 0.32
0.32
(c) No , user introducing Wastewater
pollutants into .a••publicly , owned treat-
ment works under the provisions of
this subpart shall: augment: the use ' of ••.
process wastewater as a Partial or total
substitute, for adequate.' treatment to
achieve compliance with •this standard.
(d) An existing source submitting a
certification in lieu of monitoring. pur-
suant., to C.'433.12 (a) and , (b) of this
regulation , must' .implement. the toxic
organic: management plan approved by
the control authority. , "
(e);An;existing"source subject to_ this
subpart: shall comply,with `a� daily max-
inauni `pretreatment standard for Tr9
of 4.57 ing/1: ` •
(f) Compliance with the provisions
of paragraph (c), (d), and (e) of this
section shall be achieved as soon as
possible, but not later than June 30,
252'
Cyanide (A)
ally
'acilities
'art ,420
• comply
before July 10,' 1985.,Compliance with
the provisions of- paragiaphs•.(a).:and
(b) of this section shall.be achieved as
soon as possible, but not later :than
February 15, 1986.
(48 FR 32485, July 15, 1983, as amended at
48 FR 41410, Sept. 15, 1983; 48 FR 43682,
Sept. 26, 1983]
§ 433.16 New source performance stand-
ards (NSPS). - . • .
(a) Any new `source subject to this
subpart' must achieve the following
performance standards:
NSPS
Pollutant or pollutant property
Cadmium
Chromium m
Copper m...-.»........... ».........
»...»
Nickel(1)....»..._.......... ».............
Silver (T)
Zinc (T)
TTO
Oil and Grease
TSS... ......._.... -
Maximum for
any 1 day
Monthty
average
shall not
• exceed
Milligrams per liter (mg/I)
0.11
2.77
3.38
0.69
3.98
0.43
2.61
1.20
2.13
52
60,
(1)
0.07
1.71 Cadmium (T)
2.07 Chromium (T)
0.43 Copper (T)
2.38 Lead (1)
0.24 Nickel (T)
1.48 Silver (T)
§ 433.17
dilute the wastewater as a partial or
total substitute for adequate treat-
ment to achieve . compliance with this
limitation.
(48 FR 32485, July 15, 1983; 48 FR 43682,
Sept. 26, 1983] '
§ 433.17 Pretreatment standards for new
sources (PSNS). •
(a) Except as provided in 40 CFR
403.7, any new source subject to this
subpart that introduces pollutants
into a publicly owned treatment works
must comply with ; 40 CFR Part 403
and achieve the following pretreat-
ment standards for new sources
(PSNS):
PSNS
Pollutant or pollutant property
0.65
Cyanide m
26 TTO..........»......._.._ _....
31
(i)
' Within 6.0 to 9.0.
(b) Alternatively, for industrial fa-
cilities with cyanide treatment, , and
upon agreement between- a source sub-
ject to those " limits and the pollution
control authority, the following ame-
nable cyanide limit may apply in place
of the total cyanide limit • specified ' in
paragraph""(a) of this section:
.
Pollutant or pollutant property
Cyanid(A)
Maximum, for
any l day
Monthly
ayshhaallmnoot
exceed •
MUligratrsa per liter (mg/I)
0.88
•'0.32
(c) No user subject to the provisions
of this subpart shall augment the use
of process wastewater • or otherwise
Maximum
for any 1
day
IMMO
Monthly
shall not
exceed
Milligrams per liter (mg/0
0.11
2.77
3.38
0.69
3.98
0.43
. 2.61
1.20
2.13
0.07
1.71
2.07
0.43
2.38
0.24
1.48
0.65
(b) Alternatively, for industrial fa-
cilities with cyanide treatment, and
upon agreement between a source sub-
ject to these limits and . the ,pollution
control, authority, the following :ame-
nable cyanide limit may apply in place
of the total cyanide limit specified in
paragraph ' (a) of this section:
Pollutant or pollutant property
Cyanide
•
%Maidnium
for any 1
day
Monthly
shall average
exceed
Milligrams per titer (mg/0
0.88
0.32
(c) No -user subject to. the provisions
of this subpart' shall augment the use
of - process wastewater • . or otherwise
dilute the wastewater as a partial or
total substitute for adequate treat-
253

•
•
433.12
Parachlorometa cresol
chloroform (trichloromethane)
t-Chlorophenol , .:: ; ,
L,2-Dichlorobenzene
l,3-Dichlorobenzene
L,4-Dichlorobenzene.
1,3-Dichlorobenzidine'=. ' `
1,1-Dichloroethylene ,' t
L,2-Trans-dichloroethylene
:,4-Dichlorophenol
L,2-Dichloroprdpane
1.,3-Dichloropropylene (1,3-dichloropropene)
1,4-Dimethylphenol
3,4-Dinitrotoluene' f'
3,6-Dinitrotoluene
L,2-Diphenylhydrazine
1thylbenzene
Pluoranthene •
L-Chlorophenyl phenyl ether
L-Bromophenyl phenyl ether
3is (2-chloroisopropyl) ether
3is (2-chloroethoxy) methane'
Methylene chloride (dichloromethane)
vlethyl chloride (chloromethane) .
vlethyl bromide (bromomethane) ; -
3romoform (tribromomethane)
3ichlorobromomethane
'.hlorodibromomethane
iexachlorobutadiene
iexachlorocyclopentadiene
sophorone
Taphthalene
nitrobenzene
Nitrophenol
-Nitrophenol
;,4-Dinitrophenol
,6-Dinitro-o-cresol •
T-nitrosodimethylamine
T-nitrosodiphenylamine
T-nitrosodi-n-propylamine •
'entachlorophenol •
'henol
3is (2-ethylhexyl) phthalate
3uty1 benzyl phthalate _
)1-n-butyl phthalate '
)i-n-octyl phthalate.
)Methyl phthalate
)imethyl phthalate
,2-Benzanthracene
(benzo(a)anthracene)
tenzo(a)pyrene (3,4-benzopyrene).
,4-Benzofluoranthene
(benzo(b)fluoranthene)'
1,12-Benzofluoranthene
(benzo(k)fluoranthene)" `' =
;hrysene �.•;.,. ,t
,,........-
,cenaphthylene
nthracene •
,12-Benzoperylene (benzo(ghi)perylene)''s
quorene
Phenanthrene
,2,5,6-Dibenzanthracene • • '
(dibenzo(a,h)anthracene) .
1deno(1,2,3-cd) . _ pyrene- -" (2,3-o-phenlene
pyreue) •
yrene .
'etrachloroethylene
40 CFR Ch. I (7-1-89 Edition)
Toluene •
Trichloroethylene :
Vinyl chloride (chloroethylene)
Aldrin .
Dieldrin. • , .
Chlordane (technical 'Mixture and metabo-
., .liter)'• ,
4,4-DDT
4,4-DDE (p,p-DDX)
4,4-DDD (p,p-TDE)
Alpha-endosulfan .:
Beta-endosulfan
Endosulfan sulfate
Endrin •
Endrin aldehyde
Heptachlor
Heptachlor epoxide
(BHC-hexachloro-
cyclohexane)
Alpha-BHC
Beta-BHC •
Gamma-BHC
Delta BHC
(PCB -polychlorinated biphenyls)
PCB-1242 (Arochlor 1242)
PCB-1254 (Arochlor 1254)
PCB-1221 (Arochlor 1221)
PCB-1232 (Arochlor 1232)
PCB-1248 (Arochlor 1248)
PCB-1260 (Arochlor 1260)
PCB-1016 (Arochlor 1016)
Toxaphene
• 2,3,7,8-Tetrachlorodibenzo-p-dioxin
(TCDD)
(48 FR 32485, July 15, 1983; 48 FR 43682.
Sept. 26,. 1983, as amended at 51 FR 40421,
Nov. 7,1986]
•s
{ 43'3.12 Monitoring requirements.
(a) In lieu of requiring monitoring
for TTO, the permitting authority (or,
in the case of indirect dischargers, the
control authority) may allow discharg-
ers to make the following certification
statement: "Based , -on my inquiry of
the person.or:persons directly respon-
sible for. managing •compliance with
the: permit limitation (or pretreatment
standard] . for total toxic . organics
(TTO), I certify . that, to the best of
my knowledge and belief, no dumping
Of Concentrated toxic organics into the
wastewaters . has occurred: since filing
of the last discharge ,:monitoring
report. I further certify that this facil-
ity • is implementing- the toxic • organic
management ; plan submitted to the
permitting: (or - control]. authority."
For direct dischargers, this statement
is to be included as a' "comment" on
the Discharge Monitoring Report re-
quired by 40 CFR 122.44(i), formerly
Environmental Protection Agency
40 CFR 122.62(i). For indirect dis-
chargers, the.statement is to be includ-
ed as a comment to the periodic 're-
ports required by 40 CFR 403.12(e). If
monitoring is necessary to measure
compliance with, the TTO . . standard,.
the industrial • discharger need analyse
for only those pollutants which would
reasonably be expected to be present.
(b) In requesting the certification al-
ternative, 'a discharger shall submit a
solvent management plan that speci-
fies to the 'satisfaction of the permit-
ting authority (or, in, the case of indi-
rect dischargers, the control author-
ity) the toxic organic compounds used;
the method of disposal used instead of
dumping, such as reclamation, con-
tract hauling, or incineration; and pro-
cedures for .ensuring- that toxic organ-.
ics ' do not routinely spill or leak into
the wastewater. For direct dischargers,
the permitting authority shall incor-
porate the • plan as a provision of the
permit.
(c) Sell -monitoring for _cyanide must
be conducted after cyanide treatment
and before dilution with other
streams. Alternatively, samples may
be taken of the final effluent, if the
plant limitations are adjusted based
on the dilution ratio of the cyanide
waste stream flow to the effluent flow.
(Approved by the Office of Management
and Budget under control number 2040-
0074)
[48 FR' 32485, July 15,• 1983; 48 FR 43682,
Sept. 26, 1983; 49 FR 34823; Sept. 4, .19841 .
433.13 ; Effluent limi
5tations . representing. _
the degree of effluent.reduction attain-•:
able by applying•; the. best practicable
control technology currently. available
(BPT).
(a) Except as' provided in . 40' CFR
125.30 ' through-125.32,' any existing' •
point' source subject to this subpart
must achieve the .following effluent,'
limitations representing the degree of
effluent reduction attainable by apply
ing the best; practicable : control',tech-
a nology currently vailable` (BPT): ;',` •
§ 433.14
BPT ,EFFLUENT, LIMITATIONS
Pollutant or pollutan
P Y.
Cadmium (7)
Chromium m
Lead m
Silver m
Zinc m
Cyanide m
TTO
Oil & Grease
TSS
pH
�Within 6.0to9.0.
Maximum for
any 1 day
Monthly
no
t
l not
exceed
Milligrams per liter (mg/1)
0.89
2.77
3.38
0.89
3.98
0.43
2.61
1.20
2.13
52
60
(1)
0.24
1.7'
2.0,
0.4:
2.31
0.24
1.41
0.61
26
31
(1)
(b) Alternatively, for industrial fa
cilities with . cyanide treatment, and
upon agreement between a source sub
ject to those limits and the pollution
control authority,the following ame•
nable cyanide limit may apply in place
of the total cyanide limit specified it
paragraph (a) of this section:
Pollutant or pollutant property
Cyanide (A)
Maximum for
any 1day
Monthly
average
shall not
exceed
Milligrams per titer (mg/1)
0.86
0.3:
(c) No user subject to the provisions
of this subpart shall augment the use
of ; process wastewater . or otherwise
dilute- the wastewater as a partial ox
total .. substitute for adequate treat-
ment to achieve 'compliance with this
limitation.
6 433.14 . Effluent limitations representing
the degree of effluent reduction attain-
able by applying the best available
technology economically ach levable
(BAT). '
(a) Except .as provided in 40, CFR
125.30 through . 125.32; any existing
point, source . subject ;.to this subpart
must achieve the following effluent
limitations representing the degree of
effluent reduction attainable by apply-
250
251

DIVISION OF ENVIRONMENTAL MANAGEMENT
October 22, 1993
MEMORANDUM
TO: Larry Coble
FROM: Jacquelyn M. Nowell
THRU: Ruth Swanek j
Carla Sanderson
SUBJECT: Instream Assessment for SOC 67b Request
Town of Sparta
NPDES Permit No. NC0026913
Alleghany County
Summary and Recommendations
The Technical Support Branch has completed an instream assessment in response to
the SOC request for the Town of Sparta. Sparta has consistently violated its effluent limit
for flow during the past year. The Town requested an increase in flow due to
inflow/infiltration problems and additional domestic wastewater from single family homes.
The design flow of the Sparta plant is 0.250 MGD and the SOC flow requested is 0.375
MGD, this includes 0.050 MGD for domestic wasteflow and .075 MGD for
inflow/infiltration.
The results of the Level B model analysis indicated that the predicted dissolved
oxygen (DO) concentration was not significantly affected by the additional flow. The EMC
67(b) criteria, which states that the discharge will not increase the DO minimum by more
than 0.5 mg/land will not extend the streamlength of the DO minimum by more than 0.5
miles, was maintained with the additional SOC flow.
Background
The Town of Sparta discharges into the Little River in the New River Basin and has
a stream classification of C. The streamflows at Sparta's discharge point have been revised
per the 1991 USGS Report, "Low How Characteristics of Streams in North Carolina."
The revised summer 7Q10 is estimated to be 9.9 cfs, the average flow is 61.2 cfs and the
drainage area is 34 miles.
A review of the compliance evaluation data shows that the Sparta facility is
consistently meeting all permit limitations except flow. Since November, 1992, the flow
limit of 0.250 MGD has been exceeded four (4) times.
The Town was previously under a Judicial Order of Consent (JOC) in 1987-88 for
BOD, TSS, and flow limits that could be exceeded during plant construction.
Analysis and Discussion
An instream assessment was performed using the Level B model framework. The
design flow of the Sparta plant is 0.250 MGD. The pre-SOC flow used is 0.325 MGD,
based on the facility's current problem with inflow/infiltration . Wasteflow in the plant has

Instream Assessment for Sparta SOC
- page 2-
reached this amount above the design flow. The post-SOC flow used is 0.375 MGD, this
allows for the additional 50,000 GPD of domestic flow from single family residences that
will be added during the period of the SOC.
The effluent limits recommended for the SOC are the existing permit limits of 30
mg/1 of BOD5, 30 mg/1 of TSS and 200/100m1 of fecal coliform. The only permit
contravention requested is for flow. Model inputs included 45 mg/1 of CBOD (30 mg/1 of
BOD5 * 1.5) and 39.6 mg/1 of NBOD ( highest NH3 monthly average of 8.8 mg/1* 4.5) at
the pre-SOC and post-SOC flows. The model results for both wasteflows demonstrate no
significant depression of the instream DO level or extension of the zone of impact when the
wasteflow is increased.
cc: Kent Wiggins
Central Files.

Table 1. Instream Assessment Summary for the Town of Sparta
Qw
(MGD)
Wasteflow Assumptions
Design Capacity
Pre-SOC Flow
SOC Flow Requested
Pre-SOC + SOC Flow
0.250 MGD
0.325 MGD
0.050 MGD
0.375 MGD
Model Input Summary
Headwater conditions:
S7Q10 flow
W7Q10 flow
Average flow
Design Temperature
CBOD
NBOD
DO (90% saturation)
9.9 cfs
14.8 cfs
61.2 cfs
23 °C
2.0 mg/1
1.0 mg/1
7.72mg/I
Wastewater Inputs:
Pre- SOC Wasteflow
Post-SOC Wasteflow
CBOD
NBOD
DO
min.
(mg/1)
0.325 MGD
0.375 MGD
45 mg/1
39.6 mg/1
Model Output Summary
Net
Change
(mg/1)
Distance D.O.
<5.0 mg/1
(mi.)
Net
Change
(mi.)
0.325
0.375
7.35 na 0.0 NA
7.29 0.06 0.0 0.0

_Co
G) 1) .44)
0
)JG g
Cr' fi) = f mitre-
/./ 1.))0 6 4' 17 4, 3 9• 4 •.pia;
�.. � 6 Ifit,- n'

c
O
id
>
J
c.f
(ItS*.t-Q(ACC.

SUMMER
SPARTA SOC @ DESIGN FLOW
MODEL RESULTS
Discharger : TOWN OF SPARTA
Receiving Stream : LITTLE RIVER
The End D.O. is 8.39 mg/l.
The End CBOD is 3.13 mg/1.
The End NBOD is 2.10 mg/l.
WLA WLA WLA
DO Min CBOD NBOD DO Waste Flow
(mg/1) Milepoint Reach # (mg/1) (mg/1) (mg/1) (mgd)
Segment 1 7.43 0.00 1
Reach 1 45.00 39.60 0.00 0.25000

tir
*** MODEL SUMMARY DATA ***
Discharger : TOWN OF SPARTA Subbasin : 050703
Receiving Stream : LITTLE RIVER Stream Class: C
Summer 7Q10 : 9.9 Winter 7Q10 : 14.8
Design Temperature: 23.0
ILENGTHI SLOPE' VELOCITY 1 DEPTH' Kd 1 Kd I Ka I Ka I KN I
1 mile I ft/mil fps I ft 'design' @204 'design! @204 Idesignl
I I I 1 1 1 1 1 1 I
Segment 1 I 2.70I 19.501 0.399 1 1.31 1 0.35 10.30 110.81 110.121 0.38 I
Reach 1 1 I I 1 1 1 I I I I
Flow I CBOD I NBOD 1 D.Q. I
I cfs I mg/1 1 mg/1 1 mg/1
Segment 1 Reach 1
Waste 1 0.388 1 45.000 1 39.600 I 0.000
Headwaters) 9.900 1 2.000 I 1.000 I 7.720
Tributary I 0.000 I 2.000 1 1.000 1 7.720
* Runoff 1 0.000 1 2.000 1 1.000 I 7.720
* Runoff flow is in cfs/mile

SUMMER
SPARTA SOC @ DESIGN FLOW
I Seg #
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
I Seg #
Reach # I Seg Mi I D.O. I CBOD I NBOD I Flow I
1 0.00 7.43 3.62 2.45 10.29
1 0.10 7.57 3.60 2.44 10.29
1 0.20 7.70 3.58 2.43 10.29
1 0.30 7.80 3.56 2.41 10.29
1 0.40 7.89 3.54 2.40 10.29
1 0.50 7.96 3.52 2.38 10.29
1 0.60 8.03 3.51 2.37 10.29
1 0.70 8.08 3.49 2.36 10.29
1 0.80 8.13 3.47 2.34 10.29
1 0.90 8.17 3.45 2.33 10.29
1 1.00 8.20 3.43 2.32 10.29
1 1.10 8.23 3.41 2.30 10.29
1 1.20 8.25 3.39 2.29 10.29
1 1.30 8.28 3.38 2.28 10.29
1 1.40 8.29 3.36 2.26 10.29
1 1.50 8.31 3.34 2.25 10.29
1 1.60 8.32 3.32 2.24 10.29
1 1.70 8.33 3.31 2.22 10.29
1 1.80 8.34 3.29 2.21 10.29
1 1.90 8.35 3.27 2.20 10.29
1 2.00 8.36 3.25 2.19 10.29
1 2.10 8.36 3.24 2.17 10.29
1 2.20 8.37 3.22 2.16 10.29
1 2.30 8.37 3.20 2.15 10.29
1 2.40 8.38 3.18 2.14 10.29
1 2.50 8.38 3.17 2.12 10.29
1 2.60 8.39 3.15 2.11 10.29
1 2.70 8.39 3.13 2.10 10.29
Reach # I Seg Mi I D.O. I CBOD I NBOD I Flow I

MODEL RESULTS
Discharger : TOWN OF SPARTA
Receiving Stream : LITTLE RIVER
SUMMER
SPARTA SOC @ 0.325 MGD(PRE-SOC
FLOW)
The End D.O. is 8.36 mg/l.
The End CBOD is 3.54 mg/l.
The End NBOD is 2.46 mg/l.
WLA WLA WLA
DO Min CBOD NBOD DO Waste Flow
(mg/1) Milepoint Reach # (mg/1) (mg/1) (mg/1) (mgd)
Segment 1 7.35 0.00 1
Reach 1 45.00 39.60 0.00 0.32500

*** MODEL SUMMARY DATA ***
Discharger : TOWN OF-SPARTA Subbasin : 050703
Receiving Stream : LITTLE RIVER Stream Class: C
Summer 7Q10 : 9.9 Winter 7Q10 : 14.8
Design Temperature: 23.0
'LENGTH' SLOPE' VELOCITY 1 DEPTH) Kd 1 Kd 1 Ka 1 Ka I KN 1
I mile I ft/mil fps 1 ft Idesignl @201/2 'design' @204 'design'
I I I 1 I I I I I I
Segment 1 1 2.701 19.501 0.403 11.31 10.35 1 0.30 110.90 1 10.211 0.38 I
Reach 1 1 I I I 1 I 1 1 1
I Flow 1 CBOD I NBOD 1 D.O. I
I cfs 1 mg/1 1 mg/1 I mg/1 I
Segment 1 Reach 1
Waste I 0.504 1 45.000 139.600 I 0.000
Headwaters) 9.900 I 2.000 1 1.000 I 7.720
Tributary I 0.000 1 2.000 I 1.000 I 7.720
* Runoff I 0.000 1 2.000 I 1.000 1 7.720
* Runoff flow is in cfs/mile

SUMMER
SPARTA SOC @ 0.325 MGD(PRE-SOC
FLOW)
I Seg # I Reach # I Seg Mi I D.O. I CBOD I NBOD I Flow I
1 1 0.00 7.35 4.08 2.87 10.40
1 1 0.10 7.50 4.06 2.85 10.40
1 1 0.20 7.63 4.04 2.84 10.40
1 1 0.30 7.74 4.02 2.82 10.40
1 1 0.40 7.83 4.00 2.80 10.40
1 1 0.50 7.91 3.98 2.79 10.40
1 1 0.60 7.98 3.95 2.77 10.40
1 1 0.70 8.04 3.93 2.76 10.40
1 1 0.80 8.09 3.91 2.74 10.40
1 1 0.90 8.13 3.89 2.72 10.40
1 1 1.00 8.16 3.87 2.71 10.40
1 1 1.10 8.19 3.85 2.69 10.40
1 1 1.20 8.22 3.83 2.68 10.40
1 1 1.30 8.24 3.81 2.66 10.40
1 1 1.40 8.26 3.79 2.65 10.40
1 1 1.50 8.28 3.77 2.63 10.40
1 1 1.60 8.29 3.75 2.62 10.40
1 1 1.70 8.30 3.73 2.60 10.40
1 1 1.80 8.31 3.71 2.59 10.40
1 1 1.90 8.32 3.69 2.57 10.40
1 1 2.00 8.33 3.67 2.56 10.40
1 1 2.10 8.34 3.65 2.54 10.40
1 1 2.20 8.34 3.63 2.53 10.40
1 1 2.30 8.35 3.61 2.51 10.40
1 1 2.40 8.35 3.59 2.50 10.40
1 1 2.50 8.36 3.57 2.49 10.40
1 1 2.60 8.36 3.56 2.47 10.40
1 1 2.70 8.36 3.54 2.46 10.40
I Seg # I Reach # I Seg Mi I D.O. I CBOD I NBOD I Flow I

MODEL RESULTS
Discharger : TOWN OF SPARTA
Receiving Stream : LITTLE RIVER
SUMMER
SPARTA SOC @ 0.375 MGD (POST
SOC FLOW)
The End D.O. is 8.35 mg/l.
The End CBOD is 3.80 mg/l.
The End NBOD is 2.69 mg/1.
WLA WLA WLA
DO Min CBOD NBOD DO Waste Flow
(mg/1) Milepoint Reach # (mg/1) (mg/1) (mg/1) (mgd)
Segment 1 7.29 0.00 1
Reach 1 45.00 39.60 0.00 0.37500

*** MODEL SUMMARY DATA ***
Discharger : TOWN OF SPARTA Subbasin : 050703
Receiving Stream : LITTLE RIVER Stream Class: C
Summer 7Q10 : 9.9 Winter 7Q10 : 14.8
Design Temperature: 23.0
'LENGTH' SLOPE' VELOCITY 1 DEPTH' Kd I Kd I Ka I Ka I KN I
I mile I ft/mil fps 1 ft 'design! @20' 'design' @201/2 !design'
I I I I I I I I
Segment 1 I 2.701 19.501 0.405 11.31 10.35 10.31 110.96 110.271 0.38 I
Reach 1 I I I I I I I I I I
I Flow 1 CBOD 1 NBOD 1 D.Q. I
1 cfs 1 mg/1 I mg/1 1 mg/1 I
Segment 1 Reach 1
Waste I 0.581 145.000 139.600 I 0.000
Headwaters) 9.900 1 2.000 1 1.000 I 7.720
Tributary 1 0.000 I 2.000 I 1.000 I 7.720
* Runoff I 0.000 1 2.000 1 1.000 I 7.720
* Runoff flow is in cfs/mile

Seg # I Reach # I Seg Mi
1 1 0.00
1 1 0.10
1 1 0.20
1 1 0.30
1 1 0.40
1 1 0.50
1 1 0.60
1 1 0.70
1 1 0.80
1 1 0.90
1 1 1.00
1 1 1.10
1 1 1.20
1 1 1.30
1 1 1.40
1 1 1.50
1 1 1.60
1 1 1.70
1 1 1.80
1 1 1.90
1 1 2.00
1 1 2.10
1 1 2.20
1 1 2.30
1 1 2.40
1 1 2.50
1 1 2.60
1 1 2.70
Seg # I Reach # I Seg Mi
I
I
SUMMER
SPARTA SOC @ 0.375 MGD (POST
SOC FLOW)
D.O. I CBOD I NBOD I Flow I
7.29 4.38 3.14 10.48
7.45 4.36 3.12 10.48
7.59 4.34 3.10 10.48
7.70 4.32 3.09 10.48
7.80 4.29 3.07 10.48
7.88 4.27 3.05 10.48
7.95 4.25 3.03 10.48
8.01 4.23 3.02 10.48
8.06 4.20 3.00 10.48
8.10 4.18 2.98 10.48
8.14 4.16 2.97 10.48
8.17 4.14 2.95 10.48
8.20 4.12 2.93 10.48
8.22 4.09 2.92 10.48
8.24 4.07 2.90 10.48
8.26 4.05 2.88 10.48
8.27 4.03 2.87 10.48
8.28 4.01 2.85 10.48
8.29 3.99 2.83 10.48
8.30 3.97 2.82 10.48
8.31 3.94 2.80 10.48
8.32 3.92 2.79 10.48
8.33 3.90 2.77 10.48
8.33 3.88 2.75 10.48
8.34 3.86 2.74 10.48
8.34 3.84 2.72 10.48
8.34 3.82 2.71 10.48
8.35 3.80 2.69 10.48
D.O. I CBOD I NBOD I Flow I

MEMO
DATE• 1 3/0 VOQ
TO: SUBJECT: >7 )0 Crr 947e-Rq
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DIVISION OF ENVIRONMENTAL MANAGEMENT
August 26, 1993
MEMORANDUM
TO: Steve Tedder
From: Dennis Ramsey
Subject: SOC 67b Request
Town of Sparta
Alleghany County
EMC # WQ 93-13
Winston-Salem Regional Office
Recommendation: Proceed to Public Notice
Background:
1-Compliance Status:
The Town currently operates a .250 MGD extended aeration plant, consisting of a
barscreen, aeration basin, clarifier, sludge digestion (aerated), and chlorination. The Town
is unable to consistently meet the final effluent limitation for Flow due to Infiltration/Inflow
problems. Compliance will require the Town to repair and replace sewer lines and
manholes. Under the Order the Town requests .050 MGD of additional flow for projected
domestic waste from single family homes.
The Order contains a detailed schedule for compliance and stipulated penalties for
failing to meet compliance dates. This Order will expire on March 31, 1995.
2-Funding Commitment:
Capital Outlay
3-Stream Impact:
No instream assessment completed. There has been no change in the limits except
for flow as it increased due to Infiltration/Inflow. The facility would have a flow limit of
.375 MGD during the term of the SOC which is greater than the .250 MGD design flow.
Downstream water quality impacts could be affected by the washout of solids from the
plant during high flows.
4-SOC Documentation:
Adequate
5-Consistent with Regional Recommendation:
Yes
6-Modifications to Draft SOC:
None
7-Facilities Assessment Log -In Date:
August 11, 1993

NORTH CAROLINA
ENVIRONMENTAL MANAGEMENT COMMISSION
COUNTY OF ALLEGHANY
IN THE MATTER OF
NORTH CAROLINA
NPDES PERMIT
NO. NC0026913
HELD BY THE TOWN
OF SPARTA
)
)
)
)
)
SPECIAL ORDER BY CONSENT
EMC WQ NO. 93-13
Pursuant to provisions of North Carolina General Statutes (G.S.)
143-215.2 and 143-215.67, this Special Order by Consent is
entered into by the Town of Sparta, hereinafter referred to as
the Town, and the North Carolina Environmental Management
Commission, an agency of the State of North Carolina created by
G.S. 143B-282, and hereinafter referred to as the Commission:
1. The Town and the Commission hereby stipulate the following:
(a) That the Town holds North Carolina NPDES Permit No.
NC0026913 for operation of an existing wastewater treatment
works and for making an outlet therefrom for treated
wastewater to Little River, Class C waters of this State in
the New River Basin, but is unable to comply with the final
effluent limitations for Flow as set forth in the Permit.
Compliance will require the repair and replacement of sewer
lines and manholes.
(b) That noncompliance with final effluent limitations
constitutes causing and contributing to pollution of the
waters of this State named above, and the Town is within the
jurisdiction of the Commission as set forth in G.S. Chapter
143, Article 21.
(c) That the Town desires to cause or allow the discharge
of 50,000 gpd of additional wastewater to the treatment
works, and that the discharge of such additional wastewater
will not result in any significant degradation of the
quality of any waters.
(d) That the Town has secured financing for planning and
construction for treatment works which, when constructed and
operated, will be sufficient to adequately treat the
wastewater presently being discharged and the additional
wastewater desired to be discharged, to the extent that the
Town will be able to comply with final permit effluent
limitations.

Page 2
(e) Since this Special Order is by Consent, neither party
will file a petition for a contested case or for judicial
review concerning its terms.
2. The Town, desiring to comply with the permit identified in
paragraph 1(a) above, hereby agrees to do the following:
(a) Provide the Winston-Salem Regional Office of the North
Carolina Division of Environmental Management (DEM), located
at 8025 North Point Blvd., Suite 100, Winston-Salem N.C.
27106, with a list of all additions of flow under
Town's Special Order, and update this list each
time flow is added to the system.
(b) Undertake the following activities in accordance with
the indicated time schedule:
1) On or before September 1, 1993, begin Smoking and
Repairing sewer lines North of US Highway 21.
2) On or before May 31, 1994, complete repairs on
the sewer lines North of US Highway 21.
3) On or before June 1, 1994, begin Smoking and
Repairing sewer lines South of US Highway 18.
4) On or before December 31, 1994, complete repairs
on the sewer lines South of US Highway 18, and
Achieve Compliance with Final Effluent
Limitations.
(c) Comply with all terms and conditions of the permit
except those effluent limitations identified in paragraph
1(a) above. See Attachment A for all monitoring
requirements and effluent limitations. The permittee may
also be required to monitor for other parameters as deemed
necessary by the Director in future permits or
administrative letters.
(d) During the time in which this Special Order by Consent
is effective, comply with the interim effluent limitations
contained in Attachment A. The following reflects only the
limitations that have been modified from NPDES requirements
by this Order:
Permit Limits Modified Limits (SOC)
Parameters Unit Monthly Avg. Weekly Avg. Monthly Avg. Weekly vg.
Flow MGD .250 .375

Page 3
(e) Two later than j calendar days after any date
identified for accomplishment of. any activity listed in 2(b')
above, submit to the Director of DEM written notice of
compliance or noncompliance therewith. In the, case of
noncompliance, the notice sha1l include a statement of the
reason(s) for noncompliance, remedial action(s) taken, and a
statement identifyina the extent to which subsequgnt dates g
times for accomplishment of listed activities pay ha affected.
(f) Enforce the water conservation provisions of the State
Building Code as it applies to new residential construction
(Volume 11, Chapter IV 401.2, 401.3).
(g) Use forty percent (40%) of the revenue received by a
municipality from additional one-half percent (1/2%) sales and
use taxes levied during the first five fiscal years in which the
additional taxes are in effect in the municipality and thirty
percent (30%) of the revenue received by a municipality from
these taxes in the second five fiscal years in which the taxes
are in effect in the municipality for water and sewer capital
outlay purposes or to retire any indebtedness incurred by the
municipality for these purposes.
3. The Town agrees that unless excused under paragraph 4, the Town
will pay the Director of DEM, by check payable to the North Carolina
Department of Environment, Health and Natural Resources, stipulated
penalties according to the following schedule for failure to meet the
deadlines set out in paragraphs 2(b) and 2(e), or failure to attain
compliance with the effluent limitations/monitoring requirements
contained in Attachment A.
Failure to meet a schedule date
Failure to maintain compliance with
any modified limit contained in the
Soc.
Failure to achieve compliance with
final effluent limits will be based
on the first three months that the
facility is required to meet final
effluent limits (Jan., Feb. &
Mar. 1995).
$100/day for the first 7
days; $500/day
thereafter
$1000/violation
$2,500.00

Page 4
Monitoring frequency violations $100 per omitted value
per parameter
Failure to submit progress reports $50/day for the first 7
days; $250/day thereafter
4. The Town and the Commission agree that the stipulated penalties
are not due if the Town satisfies the DEM that noncompliance was
caused solely by:
a. An act of God;
b. An act of war;
c. An intentional act or omission of a third party
but this defense shall not be available if the act or
omission is that of an employee or agent of the defendant or
if the act or omission occurs in connection with a
contractual relationship with the permittee;
d. An extraordinary event beyond the permittees control.
Contractor delays or failure to obtain funding will not be
considered as events beyond the permittees control; or
e. Any combination of the above causes.
Failure within 30 days of receipt of written demand to pay the
penalties, or challenge them by a contested case petition pursuant to
G.S. 150B-23, will be grounds for a collection action , which the
Attorney General is hereby authorized to initiate. The only issue in
such an action will be whether the 30 days has elapsed.
5. In accordance with the provisions of G.S. 143-215.67(b) the
Commission allows the Town to accept the additional waste specified
below to its waste disposal system:
50,000 gpd
The nature of the additional flow is such that the waste
characteristics do not exceed those generally associated with
domestic waste or are pretreated to domestic strengths. Waste of
greater than normal domestic strength may be accepted if the
parameter(s) that exceed normal domestic strength wastewater are
not those for which interim limitations have been developed and
it can be demonstrated to the satisfaction of the Director that
the additional waste will not adversely affect the treatment
efficiency of the treatment system for any modified parameter or
result in the violation of any other permit limitation.

Page 5
All new and proposed industrial waste tributary to the system must
be controlled using all needed mechanisms including but not limited
to adoption and implementation of industrial waste control and
pretreatment ordinances. No wastewater can be accepted which
will add toxic pollutants in quantities not generally associated
with domestic wastewater characteristics, unless the acceptance
of the additional wastewater can be supported through appropriate
analyses acceptable to the Director.
6. This Special Order by Consent and any terms, conditions and
interim effluent limitations contained herein, hereby supersede any
and all previous Special Orders and Enforcement Compliance Schedule
Letters, and terms, conditions, and limitations contained therein
issued in connection with NPDES Permit No. NC0026913.
7. .Any Violation lgf terms of. th4.s Special Order by, Consent, including_
paragraphs 2(b) and, 2(e) Above And Attachment A shall terminate
paragraph gi this Order And any authorized additional waste not
previously connected t4 the system shall pot,tbereafter k_e_ connected
upti1 the necessary sewerage system improvements nave, been completed
And placed in operation.
8. Noncompliance with the terms of this Special Order by Consent is
subject to enforcement action in addition to the above stipulated
penalties, including injunctive relief pursuant to G.S. 143-215.6.
9. The permittee, upon signature of the Special Order by Consent,
will be expected to comply with all schedule dates, terms, and
conditions of this document.
10. This Special Order by Consent shall expire on March 31, 1995.
For the Town of ,e„Ll
(Title) �0w /�ia�► e,w
Date - 3 " 4I 3
For the North Carolina Environmental Management Commission
Date
Chair of the Commission

ATTACHMENT A
A (1) .
Part I
Permit No. NC0026913
EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS - Interim
During the period beginning on the effective date of this Special Order and lasting until
December 31, 1994, the permittee is authorized to discharge from outfall serial number 001.
Such discharge shall be limited and monitored by the permittee as specified below.
Effluent Characteristics Discharge Limitations
Flow
BOD, 5 Day, 20 Degrees C**
Total Suspended Residue*.*
NH3 as N
Fecal Coliform (geometric mean)
Total Residual Chlorine
Temperature
Total Nitrogen (NO2 + NO3 +TKN)
Total Phosphorus
Units as specified
Monthly Avg. Weekly Avct.
0.375
30.0 mg/1
30.0 mg/1
45.0 mg/1
45.0 mg/1
200.0/100 ml 400.0/100 ml
* Sample locations E - Effluent, I - Influent
**
Monitoring Requirements
Measurement
Frequency
Continuous
2/Month
2/Month
Monthly
2/Month
Daily
Weekly
Semi-annually
Semi-annually
Sample *Sample
Type Location
Recording
Composite
Composite
Composite
Grab
Grab
Grab
Composite
Composite
I or E
E,I
E, I
E
E
E
E
E
E
The monthly average effluent BOD5 and Total Suspended Residue concentrations shall not
exceed 15% of the respective influent values (85% removal).
The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units
shall be monitored daily at the effluent by grab sample.
and

NORTH CAROLINA DEPARTMENT OF ENVIRONMENT
HEALTH AND NATURAL RESOURCES
DIVISION OF ENVIRONMENTAL MANAGEMENT
MEMORANDUM
TO:
THROUGH:
FROM:
Jeff Bouchele
M. Steven Mauney
Jim Johnston
Environment4 Chemist
August 4, 1993
RECEIVED
WATER QUALITY SECTION
AUG 1 1 1993
OPERATIONS P?Ao"f!H
SUBJECT: Sparta SOC
Permit No. NC0026913
Alleghany County
The Town of Sparta has requested an SOC in order to be able
to correct I&I problems without being in violation of their
permit. The Town proposes to smoke the lines north of HWY 21 and
complete repairs as problems are found. Once they complete this
area they will begin smoking the lines south of HWY 18 and
completing repairs.
After completing all necessary repairs the Town will be
requesting that the SOC be voided.
The Town of Sparta has had trouble meeting their permit
limits for flow during the wet winter and spring months. The
request for the SOC is to avoid permit violations of flow while
the problem is being corrected.
The Winston Salem Regional Office recommends that this SOC
be issued.
If you have any questions or comments, please call.
cc: WSRO
77/vm

SOC STAFF REPORT
EMC WQ
1. Current MP Screen. Attached.
2. Funding source of Project. Capital Outlay.
3. In -Stream; -Assessment. N/A There has been no change in
the limits except for flow as it increased due to
Infiltration and Inflow.
4. Identify additional flows. Only domestic waste from
single family homes projected. 50,000 gpd additional
flow has been requested.
5. Specifically identify what the facility will be
constructing or modifying under the order. The Town
will be replacing sewer lines and manholes where needed
to eliminate the infiltration/inflow problems.
6. Has the facility monitored according to NPDES Permit or
SOC? Yes.
7. Is Toxicity an issue and will it be addressed? Toxicity
is not an issue at this time and it will not be
addressed.
8. Is pretreatment an issue and will it be addressed?
Pretreatment is not an issue. The Town is not required
to have a pretreatment program.
9. Facility type. A .250MGD extended aeration plant,
consisting of a barscreen, aeration basin, clarifier,
sludge digestion (aerated), and chlorination.
10. Is the facility properly operated and maintained? Yes.
11. Is permit under adjudication? No.
12. Are there any special circumstances concerning the
issuance of the SOC? Yes. The facility will be given a
flow limit of .375MGD during the SOC which is greater
than the .250 MGD design flow.
13. Final Compliance date of SOC should be listed on
Attachment A. This has been done.
14. Are the current modified NPDES parameters listed in the
SOC? Yes.

15. Discuss downstream water quality impacts. Water
quality could be affected by the washout of solids from
the plant during high flows. However, this does not
appear to be much of a problem since the pump station
can pump only so much water and the rest goes out
overflowing manholes.
16. Explain in detail how the compliance schedule and
interim limits were derived. The compliance schedule
was derived through consultation with Robert Shaw,
Town Manager.
17. Explain how monetary penalty values
were derived. N/A
18. Regional Office Recommendation. It
the SOC be issued.
(upfront penalties)
is recommended that
ignature of repport Preparer/Date
Water Quality Supervi$6r/Date

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MODEL RESULTS
Discharger : TOWN OF SPARTA
Receiving Stream : LITTLE RIVER
SUMMER
SOC @ 0.237 MGD, AVG. FLOW
BEFORE SOC
The End D.O. is 8.30 mg/l.
The End CBOD is 4.64 mg/l.
The End NBOD is 3.10 mg/l.
WLA WLA WLA
DO Min CBOD NBOD DO Waste Flow
(mg/1) Milepoint Reach # (mg/1) (mg/1) (mg/1) (mgd)
Segment 1 7.44 0.00 1
Reach 1 96.00 74.25 0.00 0.23700

*** MODEL SUMMARY DATA ***
Discharger : TOWN OF SPARTA Subbasin : 050703
Receiving Stream : LITTLE RIVER Stream Class: C
Summer 7Q10 : 9.9 Winter 7Q10 : 14.8
Design Temperature: 23.0
'LENGTH! SLOPEI VELOCITY I DEPTH' Kd 1 Kd 1 Ka 1 Ka I KN I
1 mile 1 ft/mil fps I ft 'design' @20' 'design' @201/2 'design'
1 1 1 1 1 1 1 1
Segment 1 1 2.701 19.501 0.399 11.31 1 0.35 1 0.30 110.79 1 10.111 0.38 I
Reach 1 1 1 1 1 I I I 1 1
I Flow I CBOD I NBOD I D.O. I
I cfs I mg/1 1 mg/1 1 mg/1 I
Segment 1 Reach 1
Waste 1 0.367 196.000 174.250 I 0.000
Headwaters) 9.900 1 2.000 1 1.000 I 7.720
Tributary I 0.000 I 2.000 I 1.000 I 7.720
* Runoff 1 0.000 I 2.000 1 1.000 I 7.720
* Runoff flow is in cfs/mile

I Seg # I Reach # I Seg Mi I D.O. I CBOD
1 1 0.00 7.44 5.36
1 1 0.10 7.57 5.33
1 1 0.20 7.68 5.31
1 1 0.30 7.77 5.28
1 1 0.40 7.85 5.25
1 1 0.50 7.92 5.22
1 1 0.60 7.97 5.19
1 1 0.70 8.02 5.17
1 1 0.80 8.06 5.14
1 1 0.90 8.10 5.11
1 1 1.00 8.13 5.08
1 1 1.10 8.15 5.06
1 1 1.20 8.18 5.03
1 1 1.30 8.19 5.00
1 1 1.40 8.21 4.98
1 1 1.50 8.23 4.95
1 1 1.60 8.24 4.92
1 1 1.70 8.25 4.90
1 1 1.80 8.26 4.87
1 1 1.90 8.26 4.85
1 1 2.00 8.27 4.82
1 1 2.10 8.28 4.79
1 1 2.20 8.28 4.77
1 1 2.30 8.29 4.74
1 1 2.40 8.29 4.72
1 1 2.50 8.30 4.69
1 1 2.60 8.30 4.67
1 1 2.70 8.30 4.64
I Seg # I Reach # I Seg Mi I D.O. I CBOD
SUMMER
SOC @ 0.237 MGD, AVG. FLOW
BEFORE SOC
NBOD I Flow I
3.62 10.27
3.60 10.27
3.58 10.27
3.56 10.27
3.54 10.27
3.52 10.27
3.50 10.27
3.48 10.27
3.46 10.27
3.44 10.27
3.42 10.27
3.40 10.27
3.38 10.27
3.36 10.27
3.34 10.27
3.32 10.27
3.30 10.27
3.28 10.27
3.26 10.27
3.24 10.27
3.22 10.27
3.21 10.27
3.19 10.27
3.17 10.27
3.15 10.27
3.13 10.27
3.11 10.27
3.10 10.27
NBOD I Flow I

SUMMER
SOC @ 0.250 MGD (DESIGN FLOW)
MODEL RESULTS
Discharger : TOWN OF SPARTA
Receiving Stream : LITTLE RIVER
The End D.O. is 8.29 mg/l.
The End CBOD is 4.80 mg/l.
The End NBOD is 3.22 mg/l.
WLA WLA WLA
DO Min CBOD NBOD DO Waste Flow
(mg/1) Milepoint Reach # (mg/1) (mg/1) (mg/1) (mgd)
Segment 1 7.43 0.00 1
Reach 1 96.00 74.25 0.00 0.25000

•
*** MODEL SUMMARY DATA ***
Discharger : TOWN OF SPARTA Subbasin : 050703
Receiving Stream : LITTLE RIVER Stream Class: C
Summer 7Q10 : 9.9 Winter 7Q10 : 14.8
Design Temperature: 23.0
'LENGTH' SLOPE' VELOCITY 1 DEPTH' Kd 1 Kd 1 Ka 1 Ka 1 KN
1 mile 1 ft/mil fps I ft 'design! @20' 'design' @20',i (design!
1 1 1 1 I 1 1 I 1
Segment 1 1 2.701 19.501 0.399 1 1.31 1 0.35 10.30 110.81 1 10.121 0.38 I
Reach 1 1 I 1 1 I I I I 1 I
1 Flow 1 CBOD 1 NBOD 1 D.O. 1
' cfs 1 mg/1 1 mg/1 1 mg/1 1
Segment 1 Reach 1
Waste I 0.388 196.000 174.250 1 0.000
Headwaters) 9.900 1 2.000 1 1.000 I 7.720
Tributary I 0.000 1 2.000 I 1.000 I 7.720
* Runoff I 0.000 1 2.000 I 1.000 I 7.720
* Runoff flow is in cfs/mile

I, c
SUMMER
SOC @ 0.250 MGD (DESIGN FLOW)
I Seg # I Reach # I Seg Mi I D.O. I CBOD I NBOD I Flow I
1 1 0.00 7.43 5.54 3.76 10.29
1 1 0.10 7.56 5.51 3.74 10.29
1 1 0.20 7.67 5.48 3.72 10.29
1 1 0.30 7.76 5.45 3.69 10.29
1 1 0.40 7.84 5.42 3.67 10.29
1 1 0.50 7.90 5.39 3.65 10.29
1 1 0.60 7.96 5.37 3.63 10.29
1 1 0.70 8.01 5.34 3.61 10.29
1 1 0.80 8.05 5.31 3.59 10.29
1 1 0.90 8.09 5.28 3.57 10.29
1 1 1.00 8.12 5.25 3.55 10.29
1 1 1.10 8.14 5.22 3.53 10.29
1 1 1.20 8.17 5.20 3.51 10.29
1 1 1.30 8.18 5.17 3.49 10.29
1 1 1.40 8.20 5.14 3.47 10.29
1 1 1.50 8.21 5.11 3.45 10.29
1 1 1.60 8.23 5.09 3.43 10.29
1 1 1.70 8.24 5.06 3.41 10.29
1 1 1.80 8.25 5.03 3.39 10.29
1 1 1.90 8.26 5.01 3.37 10.29
1 1 2.00 8.26 4.98 3.35 10.29
1 1 2.10 8.27 4.95 3.33 10.29
1 1 2.20 8.27 4.93 3.31 10.29
1 1 2.30 8.28 4.90 3.29 10.29
1 1 2.40 8.28 4.87 3.27 10.29
1 1 2.50 8.29 4.85 3.25 10.29
1 1 2.60 8.29 4.82 3.23 10.29
1 1 2.70 8.29 4.80 3.22 10.29
I Seg # I Reach # I Seg Mi I D.O. I CBOD I NBOD I Flow I

I
SUMMER
SOC @ 0.375 MGD (POST SOC FLOW
MODEL RESULTS
Discharger : TOWN OF SPARTA
Receiving Stream : LITTLE RIVER
The End D.O. is 8.21 mg/l.
The End CBOD is 6.25 mg/1.
The End NBOD is 4.34 mg/1.
WLA WLA WLA
DO Min CBOD NBOD DO Waste Flow
(mg/1) Milepoint Reach # (mg/1) (mg/1) (mg/1) (mgd)
Segment 1 7.29 0.00 1
Reach 1 96.00 74.25 0.00 0.37500

_
•
***MODEL SUMMARY DATA ***
Discharger : TOWN OF SPARTA Subbasin : 050703
Receiving Stream : LITTLE RIVER Stream Class: C
Summer 7Q10 : 9.9 Winter 7Q10 : 14.8
Design Temperature: 23.0
ILENGTHI SLOPE' VELOCITY 1 DEPTH) Kd I Kd I Ka I Ka I KN I
I mile I ft/mil fps I ft 'design' @204 'design' @204 'design'
I I I I 1 1 1 1 I
Segment 1 1 2.70I 19.501 0.405 1 1.31 1 0.35 10.31 110.96 110.271 0.38 I
Reach 1 1 I 1 1 1 1 1 I 1
1 Flow 1 CBOD I NBOD 1 D.O. I
I cfs 1 mg/1 I mg/1 1 mg/1 I
Segment 1 Reach 1
Waste I 0.581 1 96.000 174.250 I 0.000
Headwaters) 9.900 I 2.000 1 1.000 1 7.720
Tributary 1 0.000 1 2.000 I 1.000 1 7.720
* Runoff I 0.000 1 2.000 I 1.000 1 7.720
* Runoff flow is in cfs/mile

SUMMER
SOC @ 0.375 MGD (POST SOC FLOW
I Seg #
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Seg #
I
I Reach
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
I Reach
# I Seg Mi
0.00
0.10
0.20
0.30
0.40
0.50
0.60
0.70
0.80
0.90
1.00
1.10
1.20
1.30
1.40
1.50
1.60
1.70
1.80
1.90
2.00
2.10
2.20
2.30
D.O.
7.29
7.43
7.54
7.64
7.72
7.79
7.85
7.90
7.95
7.98
8.02
8.04
8.07
8.09
8.11
8.12
8.13
8.15
8.16
8.16
8.17
8.18
8.19
8.19
2.40 8.20
2.50 8.20
2.60 8.20
2.70 8.21
# I Seg Mi I D.O.
I CBOD I NBOD
7.21 5.06
7.17 5.03
7.14 5.00
7.10 4.98
7.06 4.95
7.02 4.92
6.99 4.89
6.95 4.86
6.91 4.84
6.88 4.81
6.84 4.78
6.81 4.75
6.77 4.73
6.73 4.70
6.70 4.67
6.66 4.65
6.63 4.62
6.59 4.59
6.56 4.57
6.52 4.54
6.49 4.52
6.45 4.49
6.42 4.47
6.39 4.44
6.35 4.41
6.32 4.39
6.29 4.36
6.25 4.34
I CBOD I NBOD
I Flow I
10.48
10.48
10.48
10.48
10.48
10.48
10.48
10.48
10.48
10.48
10.48
10.48
10.48
10.48
10.48
10.48
10.48
10.48
10.48
10.48
10.48
10.48
10.48
10.48
10.48
10.48
10.48
10.48
Flow I
I