NC0023337_Wasteload Allocation_19910913

NPDES DOCUMENT SCANNING COVER SHEET
NPDES Permit:
NC0023337
Scotland Neck WWTP
Document Type:
Permit Issuance
e:
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Correspondence
Owner Name Change
Return
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Document Date:
September 13, 1991
This document is printed on reuse paper - ignore any
content on the re -sr -ex -sae "aide

NPDES WASTE LOAD ALLOCATION
PERMITTEE NAME:
Town of Scotland Neck
FACILITY NAME: Scotland Neck Wastewater Treatment Plant
Facility Status: Existing
Permit Status: Renewal
Major Minor
Pipe No.: 001
Design Capacity: 0.675 MGD
Domestic (% of Flow): 88* %
Industrial (% of Flow): 12* %
Comments:
* based on data in application. Previous WLA gives 65/35%.
STREAM INDEX: 28-79-32-1
RECEIVING STREAM: Canal Creek
Class: C-NSW
Sub -Basin: 03-03-04
Reference USGS Quad: C29SW, Hobgood
(please attach)
County: Halifax
Regional Office: Raleigh Regional Office
Previous Exp. Date: 12/31/91 Treatment Plant Class: II, III
Classification changes within three miles:
>3 mi.
Requested by: Jule Shanklin
Prepared by: crc,Le.
Reviewed by: Ov
lob �. t 9 (5) a -1(o7
wq\et—
Date: 8/20/91
Date: 9- J/. 9/
Date: _ �t
Modeler
Date Rec.
#
sil4
61DIk(
(0390
2 ►
Drainag Ar mi ) 2 j 7 Avg. Streamflow (cfs): Z.3e
7Q10 (cfs) O. o
Winter 7Q10 (cfs) ,_ a 30Q2 (cfs) 6, o
Toxicity Limits: IWC % Acute/
Instream Monitoring: Parameters I Q nr Do - J, �� _, 4
Upstream cies
Location 56'
Downstream lr e,5 Location ?9d ' f'a-zJn 5 fr&
Effluent
Characteristics
Summer
Winter
BOD5 (mg/1)
()
7
NH3-N (mg/1)
2.�
D.O. (mg/1)
TSS (mg/1)
F. Col. (/100 ml)
pH (SU)
Pet o ,
Comments:
�\- (1P)1.)
it tl
►►
- ( b, C'oPP) z,y
11 if
pol'z.
F�Se}nie CMC'UCY
ReSJL L r1 le-iriNJ— dam`
Y1IL i)-Q_`CC `F, PSiu�lS

Facility Name:
NPDES No.:
Type of Waste:
Facility Status:
Permit Status:
Receiving Stream:
Stream Classification:
Subbasin:
County:
Regional Office:
Requestor:
Date of Request:
Topo Quad:
FACT SHEET FOR WASTELOAD ALLOCATION
Town of Scotland Neck WWTP
NC0023337
Domestic - 88%; Industrial - 12%
Existing
Renewal
Canal Creek
C-NSW
03-03-04
Halifax
Raleigh Regional Office
Jule Shanklin
8/20/91
C29SW
Request #
6390
RECEIVED
SEP /; - 199i
RALPGH RECW)N7CFF LE
Stream Characteristic:
USGS #
Date:
Drainage Area (mi2):
Summer 7Q10 (cfs):
Winter 7Q10 (cfs):
Average Flow (cfs):
30Q2 (cfs):
IWC (%):
est 208100251
1991
2.17
0.0
0.0
2.36
0.0
100
Wasteload Allocation Summary
(approach taken, correspondence with region, EPA, etc.) �a
Facility discharges to stream with 7Q10/30Q2 = 0.0. Removal of discharge
recommended in three years or new limits (page 2) will apply at that time. Facility must submit an
engineering report within 12 months of the effective date of this permit showing no alternative to
surface water discharge. Facility has overallocated for Cd, Cr, and Pb, and has been,informed.
No data has been provided for effluent toxicant concentrations. Limits are based on dual and
permitted levels. Facility has not monitored for Total Phosphorus and Total Nitrogeind should
be aware more stringent limits may be applied at a later date. This facility discharges ciao a Zero -
flow tributary of a swampy area of Deep Creek and eutrophication may occur in thes 'lower
moving waters. Chlorine letter sent @ 17 µg/l.
Special Schedule Requirements and additional cglnm
7'4 Q- .0cree0 r , 0 ..0 / e Yie
mil`: rL -4 -14 e were
/f'T svo�cr 4a�c 6ee
ents from Reviewers:
/ f // 2 a /
7//tt i
/
Recommended by: /f��
Reviewed by
Instream Assessment:
Regional Supervisor:
Permits & Engineering:
RETURN TO TECHNICAL SERVICES BY:
OCT 02
Date: R"-• 30 • i 1
Date: g)30/ci
g ate: 7.9 /9 /
Date: "AA(
1991
J`L J . (lug e u % &`-° Si' t
4 1^ ffS (0 -7 2 * (fr) . A-Le_e,,,,, .. J Qom.
73-x . f TRH -
N

Existing Limits:
Wasteflow (MGD):
BOD5 (mg/1):
NH3N (mg/1):
DO (mg/1):
TSS (mg/1):
Fecal Co1. (/100 ml):
pH (SU):
Residual Chlorine (4/1):
Oil & Grease (mg/1):
TP (mg/1):
TN (mg/1):
Recommended Limits:
Wasteflow (MGD):
BOD5 (mg/1):
NH3N (mg/1):
DO (mg/1):
TSS (mg/1):
Fecal Co1. (/100 ml):
pH (SU):
Residual Chlorine (14/1):
Oil & Grease (mg/1):
TP (mg/1):
TN (mg/1):
Limits Changes Due To:
Change in 7Q10 data
New regulations/standards
New procedures
2
CONVENTIONAL PARAMETERS
Monthly Average
Summer Winter
0.675 0.675
5.0 9.0
2.0 2.0
6.0 6.0
30 30
1000 1000
6.0-9.0 6.0-9.0
For three years:
Monthly Average
Summer Winter WQ or EL
0.675 0.675
5.0 9.0 WQ
2.0 2.0 WQ
6.0 6.0 WQ
30 30 EL
200 200 WQ
6.0-9.0 6.0-9.0 WQ
monitor monitor
monitor monitor
monitor monitor
Parameter(s) Affected
Fecal Coliform, Chlorine
After three years:
onthly Avera :e
Su:, sier W. ter
0.6 0675
5.0 4.0
1.0 1.8
6.0 . 0
30.0 30.
200. i 200.
6.0 9.0 6.0 - 9.
17 1 17.0
onitor monitor
monitor
monitor
WQ or EL
WQ
WQ
WQ
EL
WQ
WQ
WQ
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
TOXICS/METALS
Type of Toxicity Test: Chronic (Ceriodaphnia) Ch V Quarterly P/F
Recommended Limit: 90%
Monitoring Schedule: August, November, February, and May
Recommended Limits
Daily Max. WQ or EL
COD (mg/): monitor monthly
Cadmium (µg/1): 2.0 WQ
Chromium (µg/1): 50 WQ
Copper (µg/1): monitor monthly
Nickel (µg/1): 88 WQ
Lead (tg/1): 25 WQ
Zinc (µg/1): monitor monthly
Cyanide (µg/1): 5.0 WQ
Arsenic (µg/1): monitor monthly
Mercury (µg/1): 0.012 WQ
Silver (µg/1): monitor monthly
Limits Changes Due To: Parameter(s) Affected
Change in 7Q10 data
Change in stream classification
Relocation of discharge
Change in wasteflow
New pretreatment information X All
Failing toxicity test
Other (onsite toxicity study, interaction, etc.)
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.

4
INSTREAM MONITORING REQUIREMENTS
Upstream Location: 50 feet upstream of outfall
Downstream Location: 900 feet downstream of outfall
Parameters: Temperature, DO, Fecal Coliform, Conductivity
Special instream monitoring locations or monitoring frequencies:
MISCELLANEOUS INFORMATION & SPECIAL CONDITIONS
Adequacy of Existing Treatment
Has the facility demonstrated the ability to meet the proposed new limits with existing treatment
facilities? Yes No _(
If no, which parameters cannot be met? C‘% r - :� Q
Would a "phasing in" of the new limits be appropriate? Yes x No
If yes, please provide a schedule (and basis for that schedule) with the regional
office recommendations:
A c f/Z 4- . a c') V e I ".) 0
L-cZa v e, 7ce'S1(1f /...c ,t NI) a (e*
If no, why not?
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.

Facility Nam au I ‘tl a Permit #
Pipe #
CHRONIC TOXICITY P RM T LI T (QRTRLY
(**Chronic Toxicity (Ceriodaphnia) ChV at (2b %, , See Part , Condition'Z.)
The effluent discharge shall at no time exhibit 48 hour acute t xicity as lethality in an
effluent concentration of Io % nor measure a quarterly arithmetic average chronic value
less than this same percentage of waste. The chronic value will be determined using the
geometric mean of the highest concentration having no statistically detectable impairment of
reproduction or survival and the lowest concentration that does have a statistically
detectable impairment of reproduction or survival. The presence of 48 hour acute toxicity
will be determined using Fisher's Exact Test at 48 hours from test initiation. Collection
methods, exposure regimes, and further statistical methods are defined in: The North,
Carolina Phase 11 Chronic Whole Effluent Toxicity Test Procedure (July, 1991) or
subsequent versions.
The permit holder shall perform at a minimum, quarterly monitoring using these procedures
to establish compliance with the permit condition. The first test will be performed after
thirtydays from issuance of thispermit duringthe months of a Av, ,l,(
Y �
Effluent sampling for this testing shall be performed at the NPDE/permitted Final of fluent
discharge below all treatment processes.
If the test procedure performed as the first test of any single quarter measures 48 hour acute
toxicity or a chronic value less than that specified above, then multiple concentration testing
shall be performed, at a minimum, in each of the two following months.
All toxicity testing results required as part of this permit condition will be entered on the
Effluent Discharge Monitoring Form (MR-1) for the months in which tests were
performed, using the parameter code THP3B for the Chronic Value and TGA3B for the 48
hour Acute Toxicity measure (Pass/Fail). Additionally, DEM Form AT-3 (original) is to be
sent to the following address:
Attention: Environmental Sciences Branch
North Carolina Division of
Environmental Management
4401 Reedy Creek.Road
Raleigh, NC 27607
Test data shall be complete and accurate and include all supporting chemical/physical
measurements performed in association with the toxicity tests, as well as all dose/response
data. Total residual chlorine of the effluent toxicity sample must be measured and reported
if chlorine is employed for disinfection of the waste stream.
Should any test data from this monitoring requirement or tests performed by the North
Carolina Division of Environmental Management indicate potential impacts to the receiving
stream, this permit may be re -opened and modified to include alternate monitoring
requirements or limits.
NOTE: Failure to achieve test conditions as specified in the cited document, such as
minimum control organism survival and appropriate environmental controls, shall
constitute an invalid test and will require immediate retesting (within 30 days of initial
monitoring event). Failure to submit suitable test results will constitute noncompliance
with monitoring requirements.
Permitted Flow 49.67o— MGD Basin & Sub -basin 03- 3 - o 2
7Q10 O. P cfs Receivin: tr:. C&►.vt C.rr p�
1WC Ave % County
Recommended by:Date: cc• 1• 9/
PIIQLR Version 7/91

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NPDES PRETREATMENT INFORMATION RFIDtTEST FORM
FACILITY NAME: TO. w" it Scert Auc1 VI ec Q. NPDES NO. NCOO .2 3 3 3 -9-
. p�
,STER: Pc) w e 1/ DATE: (i". / a..4/ 9/ REGION: RR()
PERMIT CONDITIONS COVERING PRETREATMENT
This facility has no SIUs and should not have pretreatment language.
This facility should and/or is developing a pretreatment program.
Please include the following conditions:
Program Development
Phase I due / /
Phase II due / /
Additional Conditions
(attached)
This facility is currently implementing a pretreatment program.
Please include the following conditions:
X Program Implementation
Additional Conditions
(attached)
IGNIFICANT INDUSTRIAL USERS' (SIUs) CONTRIBUTIONS
SIU FLDW - TOTAL:
- COMPOSITION:
TE}:TILE:
METAL FINI
OTHER: ra.bbe r w•ar•�:
,oa52S MGD
,off MD
MGD
. 0 z '- MC)
MGD
MGD
MGD
F EADWORKS REVIEW
PASS
PARAMETER 'THROUGH
:ALLOWABLE
Cd
Cr
Cu
Ni
Zn
CN
Phenol
Other
.3Q
.63
A-s . 21
DAILY
DOMESTIC
.01
.oA
,off
.03
.03
.07
0
Q0 0 /
.o/
LOAD IN
PERMI'1 ri u
* , 06
.3a
.1Q
4L
.3�
0
DAY ACTUAL
INDUSTRIAL % REMOVAL
.66 9a
.ol npx-
. 03 S%
.61
.00 50
30
99*
.60 9y
,00 86*
Lie)
RECEIVED: /ate 9/ REVIEWED BY:
RETURNED: S/ c73/ 9 J
ese are Pro.-,ti fee-►x14 - a.
issLke -12+e' . nore-overa-ll6a.
b eeh 44, LT,w. w s 7t- #
LIwve expired . POT) 11ks j e.+ re
-1 1nh Vor Col. „Cr, taro(. P6 . POT1A L'na s
Peso tuPok. i. .1.e co .

08/27/91 ver 3.1 T OXICS REVIEW
F Facility: Town of Scotland Neck WWTP
NPDES PerPermit no: NC0023337
Status (E, P, or M) : E
Permitted Flow: 0.7 mgd
Actual Average Flow: 0.3 mgd
Subbasin: 03-03-04
Receiving Stream: Canal Creek I PRETREATMENT DATA I----EFLLUENT DATA---- I
Stream Classification: C-NSW I ACTUAL PERMITTEDI I
7Q10: 0.0 cfs I Ind. + Ind. + I FREQUENCY I
IWC: 100.00 % I Domestic PERMITTED Domestic I OBSERVED of Chronic)
Stn'd / Bkg I Removal Domestic Act.Ind. Total Industrial Total 1 Eflluent Criteria I
Pollutant AL Conc. 1 Eff. Load Load Load Load Load I Conc. Violationsl
(ug/l) (ug/l) 1 % (#/d) (#/d) (#/d) (#/d) (#/d) I (ug/l) (#vio/#sam)
Cadmium S 2.0 1 92% 0.0 0.0 0.01 0.1 0.070 1 I
Chromium S 50.0 1 76% 0.0 0.0 0.03 0.7 0.670 1 I I
Copper AL 7.0 1 82% 0.0 0.0 0.05 0.3 0.340 1 I N
Nickel S 88.0 I 32% 0.0 0.0 0.04 0.2 0.220 1 1 P
Lead S 25.0 1 50% 0.0 0.0 0.03 0.3 0.350 1 1 U
Zinc AL 50.0 1 30% 0.1 0.1 0.14 0.3 0.390 1 1 T
Cyanide S 5.0 1 59% 0.0 0.0 0.020 1 I
Mercury S 0.012 1 86% 0.0 0.0 0.00 0.0 0.000 1 I S
Silver AL 0.06 1 94% 0.0 0.0 0.01 0.0 0.010 1 1 E
Selenium S 5.00 1 0% 1 1 C
Arsenic S 50.00 1 40% 0.0 0.0 0.010 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/l) Loading Loading Data 1 OBSERVED (YES/NO)
Cadmium S 1 0.06 2.000 0.359 2.511 0.00 Limit Limit
Chromium S 1 0.46 50.000 3.229 72.115 0.00 Monitor Limit
Copper AL 1 0.09 7.000 4.036 27.447 0.00 Monitor Monitor
Nickel S 1 0.29 88.000 12.198 67.092 0.00
Lead 5 1 0.11 25.000 6.727 78.483 0.00
Zinc AL 1 0.16 50.000 43.950 122.433 0.00 Monitor Monitor
Cyanide 5 1 0.03 5.000 0.000 3.677 0.00 Limit
Mercury S 1 0.00 0.012 0.025 0.025 0.00 Limit Limit
Silver AL 1 0.00 0.060 0.269 0.269 0.00 Monitor Monitor
Selenium S 1 0.01 5.000 0.000 0.000 0.00
Arsenic S 1 0.19 50.000 0.000 2.691 0.00 Monitor
Phenols S 1 0.000 0.000 0.000 0.00
NH3-N C 1 0.000 0.00
T.R.Chlor.AL 1 17.000 0.00
Limit Limit
Limit Limit