NC0026271_Regional Office Historical File Pre 2018 (125)

DIVISION OF ENVIRONMENTAL MANAGEMENT
May 6, 1996
MEMORANDUM TO: Ruth Swanek C!
FROM: D. Rex Gleason ,
PREPARED BY: Richard Bridgeman(�ry�'
SUBJECT: Request for Instream Assessment
Addition Flow Under SOC
Town of Taylorsville WWTP
NPDES Permit No. NC0026271.
EMC WQ No. 96-12
Alexander County
Enclosed please find a request for an Instream Assessment for
the subject. facility. The request is.made to provide a basis for
allowing. additional flow in excess of the facility's permitted
monthly average limit.
Please advise if additional input is required.
Enclosure
RMB

REQUEST FORM FOR INSTREAM ASSESSMENT FOR 6.7b SOC
NAME OF FACILITY: Town of Taylorsville WWTP
COUNTY: Alexander REGION: Mooresville .DESIGN FLOW: 0.43 MGD
RECEIVING STREAM: Lower Little River SUBBASIN: CTB 32
BACKGROUND DATA:
A. Why is SOC needed? Facility has been exceeding permit
Flow limit because of I/I problem. Plant expansion (0.83
MGD) will begin soon; it is anticipated that construction
activities will result in BODS and TSR limits violations.
B. History of SOC requests:
1. Monthly average waste flow prior to any SOC:
0.4315 MGD,
Time period averaged: 03/95 - 02/96
2. Previously approved SOC's: N/A
3. .Flows lost from plant (facilities that have gone
off line): N/A
4. Current SOC Flow request: 0.170 MGD
5. Total plant flow post-SOC (sum of original flow
and SOC flow minus losses): 0.6.015 MGD
6. Is this an accurate flow balance for plant? N/A
CURRENT SOC REQUEST:
A. Request is
for domestic or industrial waste?
If it is
a combination,
please specify percentages.
Domestic
B. What type
of industry?. N/A
C. The region
proposes the following SOC limits:
PARAMETER
LIMIT
UNIT
Monthly Average Weekly Average
Flow
0.600 No Limit
MGD
BODS (Sum
& Win) 45.0 60.0
mg/l
TSR (Sum
& Win) 45.0 60.0
mg/l
NH3 (Sum)
17.8 No Limit
mg/l
Fecal Coliform
200.0 400.0
#/100 ml

D. What is the basis for these limits? The Town is
requesting 0.170 MGD additional flow above the permitted flow
limit of 0.430 MGD because of the documented inflow problem.
The Town is requesting the relaxed BODS and TSR limits because
during the construction activities several existing units will
be taken out of service for conversion to other uses, during
which it is anticipated that effluent quality will be
affected. Also, it is anticipated that electrical service
interruptions will affect effluent quality.

17 A. O. EFFLUENT LIMITATIONS AND MONITORING REQUIREIMENTS SUMMER (April 1 - October 31) Permit No. NCO026271 _.
During the period beginning on the effective date of the permit and lasting until expansion above 0.43 MGD or expiration, the Permittee is
authorized to discharge from outfall(s) serial number 001. Such discharges shall be limited and monitored by the permittee as specified below:
Effluent Characteristic.
Flow
BOD, .5 day, 20*C'*
Total Suspended Residue"
NH3 as N
Fecal Coliform (geometric mean)
Total Residual Chlorine
Temperature
Total, Nitrogen (NO2 + NO3 + TKN)
Total Phosphorus
Copper
Cyanide
Monthlv Ava
0.43 MGD
30.0 mg/I
30.0 mg/I
17.8 mg/1
200.0 /100 ml
* Sample locations: E - Effluent, I - Influent
Weekly Ava. Daily Max
45.0 mg/I
45.0 mg/1
400.0 /100 ml
Monitoring
Requirementf
Measurement
Fre
$ample
TVR4
*SamRle
Location
uencv
Continuous
Recording
I or E
Weekly
Composite
E, I
Weekly
Composite
E, I
Weekly
Composite
E
Weekly
Grab
E
2/Week
Grab
E
Weekly
Grab
E
Quarterly
Composite
E
Quarterly'
Composite
E
Monthly
Composite
E
Monthly .
Grab
E
** The monthly average effluent BOD5 and Total Suspended Residue concentrations shall not exceed 15 % of the respective influent value (85
% removal).
*** Chronic Toxicity (Ceriodaphnia) P/F @ 4.4%, January, April, July and October; See Part III Condition G.
The pH shall not be lessithan 6.0 standard units nor greater than 9.0 standard units -and shall be monitored weekly at the effluent by grab
sample. r
There shall be no discharge of floating solids or visible, foam in other than trace amounts.

1 1
07
Is1:I,'I,U1?N'1' 1,IMI'1'A-PIONS AND MONITORING Itl QIJIItl:sMIsN'I'S SUMMl;,R (Ahril I - Oc;lober il) I-Yrniil No. NC(X)26271:1
During the period beginning on the effective date of the permit and lasting until expansion above 0.43 MGD or expiration, the Permittee is
authorized to discharge from outfall(s) serial number 001. (Continued)
Effluent Characteristic Discharge Limitation]
Units (specify
Monthly Avg Weekly Avg. Daily Max
Zinc
Chlorides
Chronic Toxicity"'
Monitoring
Requirements
Measurement
Sample
'Sample
Frequency
Tv"e
Location.
Monthly
Composite
E
Monthly
Composite
E
Quarterly
Composite
E

7 A. (). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS WINTER (November 1 - March 31) Permit No. NC002627 I
During the period beginning on the effective date of the permit and lasting until expansion above 0.43 MGD or expiration, the Pcrmittec is
authorized to discharge from outfall(s) serial number 001. Such t:schargcs shall be limited and monitored by the permittee as specified below:
Flow
BOD, 5 day, 20°C*'
Total Suspended Residue"
NH3 as N
Fecal Coliform (geometric mean)
Total Residual Chlorine
Temperature
Total Nitrogen (NO2 + NO3 +. TKN)
Total Phosphorus
Copper
Cyanide
Discharge Limitations
Monthly Avg. Weekly Avg.
0.43 MGD
30.0 mg/1 45.0 mg/1
30.0 mg/I 45.0 mg/l
200.0 /100 ml 400.0 /100 ml
* Sample locations: E - Effluent, I - Influent
Monitoring
Requirements
Measurement
Sa
'Sample
Daily Max Frequency
Type
Location
Continuous
Recording
I or E
Weekly
Composite
E,.I
Weekly
Composite
E, I
2/Month
Composite
E
Weekly
Grab
E
2/Week
Grab
E
Weekly
Grab
E
Quarterly
Composite
E
Quarterly
Composite
E
'Monthly.
Composite
E
Monthly
Grab
E
3
** The monthly average effluent BOD5 and Total Suspended Residue concentrations shall not exceed 15'% of the respective influent value (85
%; removal).
*** Chronic Toxicity (Ceriodaphnia) P/F @. 4.4%; January, April, July and October; See Part. III, Condition G.
The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be monitored weekly at the effluent by grab
sample.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

4 r
A. (). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS WINTER (November 1 - March 31) Permit No. NC0026271
During the period beginning on the effective date of the permit and lasting until expansion above 0.43 MGD or expiration, the Permittee is
authorized to discharge from outfall(s) serial number 001. (Continued)
Effluent Characteristic Discharge Limitation:
Units (specify
Monthly Avg Weekly Avg.
Zinc
Chlorides'
Chronic Toxicity'
Monitoring_ Requirements
Measurement Sample 'Sample
Daily Max Freauencv Tvps Location
Monthly Composite E
Monthly Composite E
Quarterly Composite E

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05/06/96
COMPLIANCE EVALUATION
ANALYSIS
REPORT
PAGE 2
PERMIT--NCO026271
PIPE--OOi
REPORT
PERIOD:
9503-9602
LOC---E
FACILITY--TAYLOR%VILLE,
TOWN-WWTP
DESIGN FLOW--
^4300 CLASS--2
LOCATION--TAYLOR%VILLE
REGION.COUNTY--03
ALEXAN^DER
00400 00600
00665
00720
00940
01042'
01092
MONTH
PH TOTAL N
PHO%-TOT
CYANIDE
CHLORIDE
COPPER
ZINC
LIMIT
9.0 6.0 NOL
NOL
95/03
6.9-6.3 8.660
1.3400
LIMIT
9.0 6.0 NOL
NOL
NOL
NOL
NOL
NOL
95/04
7.2-6.2
'
95/05
7.5-6.3
95/06
7.2-6.5 9.860
76.7000
95/07 7.i-6.7
95/08 7.4-6.7
95/09 7.5-6.7 2.370 2.3700
95/10 7.4-7.i
LIMIT 9.0 6.0 NOL NOL
95/11 7.6-6.8 9.180 5.8600
`
9502 7.5-7.1
96/0i 7.7-6.7 14.508 6.5900
`
.00OO 148.00 .060 .i46O
64.3000 79.00
OOOO 84.00
.00OO
29.00
NOL
NOL
.00OO
104.00
.0000
95.20
.00OO
49.50
96/02
7.7-7.2
.00OO
9900
AVERAGE
________
8.04
18.5720
8.0375
85.96
MAXIMUM
7.700
14.500
76.7000
64.3000
i48.00
MINIMUM
6.200
2.378
1.3400
64.3000
29.00
UNIT
%U
MG/L
MG/L
MG/L
MG/L
.i35O
.i30O
NOL
.O52O
.0090
.008O
.iO50
.O65O
.i35O
.0080
UG/L
.ii6O
.i35O
.00OO
NOL
.O79O
.050)
.iiO0
.1050
.0935
.1460
.O57O
UG/L