NC0023965_Instream Assessment_19861126

DIVISION OF ENVIRONMENTAL MANAGEMENT
November 26, 1986
TO: Chuck Waklid
THROUGH: Meg Kerr71 r ,/�,%�
Steve Tedder.CU
FROM: David Vogt: 'T/V/
SUBJECT: In -stream Assessment Of Wilmington Northside WWTP Discharge
The City of Wilmington has requested a first-time SOC to increase
the flow of its Northside WWTP by 679,000 GPD. Using this facility's
self -monitoring data, the Region has estimated that the present BOD5
limit of 30 mg/l will need to be increased to a temporary limit of 47
mg/l under the SOC. Because there is considerable flow at the point of
discharge (7Q10=28 cfs, average flow=2130 cfs), the impact of the above
changes on the water quality of the Northeast Cape Fear River will be
minimal. Pre-SOC and SOC analyses using mass balance indicate that the
BOD5 instream waste concentration (IWC) will not increase significantly
(8.27 mg/1 to 13.06 mg/1).
Consideration should also be given to the discharge being only 300
feet above the confluence of the northeast branch with the main part of
the river. The combined 7010 flow below the confluence is 1149 cfs,
yielding an IWC of 2.36 mg/l of BOD5 under the SOC. Since the Cape Fear
River is influenced by tidal currents at the discharge site, pollutants
from the WWTP will be carried up the northeast branch at flood tide (1.7
knots minimum). However, because of the dilution ratio present even at
low -flow conditions, this should not be a problem.
Since the issuance of the latest permit to Wilmington-Northside in
October, 1983, there has been demonstrated tonicity of their effluent.
A toxic study conducted in the spring of this year detected elevated
effluent concentrations of copper, zinc, cyanide, ammonia, and several
organic compounds ("Wilmington Northside WWTP Toxicity Examination",
Department of Environmental Management, Water Quality Section, October
1986).
It is recommended that both the 0.679 MGD increase in wasteflow and
the 47 mg/l BOD5 limit be approved. However, based on the results of
the toxicity examination, it is also recommended that a 20 mg/l ammonia
limit and a toxicity testing requirement (attached) be required as,part
of the SOC.
cc: Page Benton
Kent Wiggins
Ken Eagleson

Table Three. Category Two Permit
Facility:
NPDES_Permit #: /V000139(0_-
1.) The permittee shall conduct chronic toxicity tests on a quarterly
basis using protocols defined in E.P.A. Document 600/4-85/014
entitled "Short -Term Methods for Estimating the Chronic Toxicity
of Effluents and Receiving Waters to Freshwater Organisms". The
testing shall be performed as a Ceriodaphnia Survival and Repro-
duction Test. Effluent collection will be performed twice during
each test as 24 hour composite samples. Toxicity test exposure
using the first composite sample will include the first three full
days of testing. Exposure to the second composite sample will in-
clude the last four full days of testing. Effluent samples will
be taken immediately prior to disinfection, but after all other
treatment processes. The Chronic Value (ChV) must be greater than
31 %. There will be minimally five effluent concentrations and a
control exposure treatment. One effluent concentration shall equal
31%, which represents the instream waste concentration (I.W.C.)
during 7Q10 low flow conditions and daily permitted d. char a volume.
The remaining concentrations shall be xt. Ws Gs, a�..k' 4rcro
There may not be more than 10% mortality in dffMjh� 95% effluent
after 48 hours of exposure.
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 re-
quire immediate retesting. Failure to submit suitable /test /results[
will constitute a permit violation. 4ij S- �s1 /ALrIPJi/ 4g4t_
rAmbf" be 5��,"771e�Y w.`tL - tgt ft'sLL1 j 'f��i�5k4d
1n G1vJe, ba-tG_ waier A.4 e41 ver.+ c. &W&,t-60
+ty.4 cvwjsilo�s C"to /'J-,'tI reitw[Is %n ad �Ces`p vassejs,A-�

-'Assessment
NAME OF /FACI'LIITY_ /LM/.cA3^7Di./=NOQ I.OE___SUBBASIN,—_
COUNTY/(`ELiJ�7G�,C/pyREGION/CM/G/G'TO.j DESIGN FLOW e.O AJ(G;
RECEIVING STREAM M7f/E,asT-646E-1EO2 g✓E&___
BACKGROUND DATA :`
A. Why is SOC needed? (Facility is out of compliance with which
effluent limits?)
1l/O.c/COMP41.ONCE 4U/7.4 VAC BDL�--
B. ' Nistory of SOC requests: ' `> = -.
1. Monthly Average waste flow
prior to any SOC S 2 mgd
Time period averaged thru B!
2. Previously'appioved SOC-.s.:_ NH
Date: flow: mgd
Date.:... "flow: mgd
total --of 'previously approved..SOC 'flow: mgd
3. Flows lost from plant AM flow: _mgd
(facitlitfes oLthat "have .gone__. ....
off line)
4. Current"SOC,,request flow: D G 79 mgd
5. Total plant flow post-SOC
(sum of original flow and
SOC flow minus losses) flow: mgd
...
.--Is—thYs-an aac``//ur8te flow balance -for
nc-for plant?-- Why/w—hy-not?
/E.5 .. . To BEST OF nay r,./Or JGEOGE
NOV
c'' f::'-n- .-

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 than a
year.
^more
(A10 ,S ,geia i-A-rrd c/-/ED)
CURRENT SOC REQUEST :
A. Request is for domestic or industrial waste? If it is a combin-
ation, please specify percentages.
/Op % �ME57/C
S. What type of industry? Please attach any pertinent data.
NA
C. The region proposes the following SOC limits:
SODS z1 7 mg/1
NH3_ NA mq/1
DO o�IA . . .m4/l :
TSS 30 mg/l
fecal coliform /000 #/100ml
PH li.O— 9,, O SU
other parameters AIA
D. What is the basis for these limits? n
A1OA//TOe/AJG -O474 S[/.BA'//TTED ey
69,W PG/.d .,Uc-7 u1iTf/ 4� c �y6Gl/E�% G/M/TE/J .De�P,dIrIETEYS
nY"•vrNtY ,e✓e-,,-.dC,-6- ✓4tt/E iVC
/A/ PQs7 /2 MO4I7-AlS 4t14.5 444/, "J/-t .UcTNodGs!
3[-XD /rYlPlla ✓En E�Fte/E✓T
t[Y.('d"7Y., /7 /5 . A17/C/P.E,--eXD 7f,AT e6oWiC3.147/0.J ,pG C04176W
7�YYJ�E2;dTC12ES ,dtAD � Z-A d lAj / :!Sh/[f7-Y--)0t-JA15 FoQ A4AIIt/7, /tAl •d.VCE
T czlZL., y. C�7?'�' /
LEi✓ES7 �r�g/� �Q um/> r� .aa�E/ ✓.a ec E _ LI�tE�

Rkcrr`i
l?!e*-TO: Asheville Raleigh
C O U R I
NOV 5 t98
6 Mooresville Washington
E R
Fayetteville W- ngton;•
Fr LAICAL
oCRVtCt� g Winston-Salem
RAflCH
DIVISION OF ENVIRONMENTAL MANAGEMENT
Date: November 5, 1986
M E M O R A N D U M
TO: Chuck Wakild , Regional Supervisor
FROM: Rent Wiggins, Coordinator
Enforcement & Emergency Response
SUBJECT: Document Review and Recommendation
Case Name: City of Wilmington-Northside WWTP
Case Number: EMC Wq 86-25
County: New Hanover
Attached please find a request for a Special Order by Consent.
The role of the regional office in the preparation of this document
is outlined in the 67(b) procedures manual. .
Please draft an SOC document including an attachment reflecting
all limits and current monitoring frequencies using the manual as a
guide.
The SOC document, accompanied by a regional checklist and staff
report including recommendations, should be submitted to this office
as soon as possible.
If you have any questions please call me at 919/733-5083.
Document Type:
Water Quality SOC
67 (b) SOC
Additional Instructions:

I
�. 17.39
CITY Hof- '� � I L-M I NGTON
C I Div
Norf�al�'h , c4na
P.O. BOX 1810
28402
October 13, 1986
Mr. Charles WakiLd
State of North Carolina
Department of Natural Resources and
Community Development
Division of Environmental Management
7225 WrightsviLLe Avenue
Wilmington, North Carolina 28403-3696
Dear Mr. WakiLd:
PUBLIC WORKS DEPARTMENT
1N30
331j301VWO1938 N019NNUM
9961 L: ! ijU
Subject: Request to Grant a Special.
Order By Consent By
Environmental Management
Commission
City of Wilmington Northside
Plant
Permit No. NCO023965
New Hanover County
Please Let this Letter serve as my official written request of
the Environmental Management Commission to grant a Special Order By
Consent for the City's Northside Wastewater Treatment PLant. Enclosed
is a certified copy of the Wilmington City Council Resolution which
requests that Special Order By Consent. Under separate cover, I am
sending another certified copy of this resolution to Mr. Preston
Howard,
To follow—up on actions we intend to take in addition to those
included in my September 29, 1985 Letter to you, I offer:
1. We wiLL attempt to upgrade our chemical feed program in the
coming months by obtaining vertical tanks, another pump, a
concrete pad, and better mixing capabilities.
2. We wiLL develop a scope of services for the consulting
engineer to : a.) confirm their findings in the
investigatory examination to be soon completed by them and
b.) evaluate cost—effective alternatives for the City to
pursue to upgrade the plant to handle 8 MGO (its hydraulic
capacity) and to handle flows for the Long term.

Mr. Charles WakiLd
October 13, 1986
Page 2
3. Vie are still in need of receiving the anaLyticaL report
conducted by the State concerning our loadings. I
understand we should soon receive the organics tests resuLts
conducted by the State. This additioneL date wiLL help us
in reaching conclusions.
4. Our pLant's performance during the second heLf of September,
1986 was better than the first half of the month. Our
readings in September, 1986 (a limited data base) indicated
that we are averaging close to 40 mg/L for BOD5 effluent.
We wiLL be out of compliance, even with chemicaL feed, with
one train out of service. It is difficult to predict the
fiLter's recovery time after December 15, 1986. Therefore,
we are still requesting interim Limits under the SpeciaL
Order by Consent of 47 mg/L for BOD5 effluent. We will
continue with the chemical feed in order to stay within
compliance and obviously we will attempt to get the plant to
operate as close to 30 as passible.
Other information contained in my September 29, 1986 Letter
remains essentially unchanged. Please advise of any additionaL
information you may need on this subject in order for our request to
be approved.
RespectfuLLyy,,
oh'EA n. _ B GIB aA----
John A. Bauer
Director of Public Utilities
JAB:bm
Enclosure
cc: Mr. Preston Howard
Mr. W. T. Anderson

William B. Farris, City Manager
RESOLUTION REQUESTING THE NORTH CAROLINA
ENVIRONMENTAL MANAGEMENT COMMISSION
TO GRANT A SPECIAL ORDER BY CONSENT
FOR THE NORTHSIDE WASTEWATER TREATMENT
PLANT
City Cou1
City of W111Tllngi
North Carol;
C.t,. October 7
WHEREAS, the James A. Loughlin Wastewater Treatment PLant (the
"Northside Plant"1 has been in violation of its NPDES Permit No.
NCO023965 for five (5) months during a twelve (121 reporting period
(July, 1985 to June, 19861 with respect to exceeding the monthly
average permit Limit of 30 mg/L for effluent DOD5; and
WHEREAS, the Division of Environmental Management notified the
City of Wilmington on September 2, 1986 that since the Northside Plant
was in non—compliance as stated above that requests for sewer system
extensions tributary to the facility would be denied; and
WHEREAS, the Northside PLent was in compliance with its permit's
DODS.Limits in June, July, and August, 1986 through the use of
chemical feed to enhance its treatment capabilities; and
WHEREAS, due to maintenance painting of one trickling fiLter and
one primary cLarifier, the Northside Plant wiLL exceed its permit's
DOD5 Limits in September, 1986, even with the use of chemicaL feed to
enhance its treatment- capab-iLities; and
WHEREAS, due to maintenance painting of another trickling fiLter
and primary clarifier, as weLL as repairs to the trickling filter, the
Northside Plant is projected to exceed its permit's DOD5 Limits even
with the use of chemicaL feed; and
WHEREAS, under N.C.G.S. 143-215.67(b) and subject to the
Provisions of N.C.G.S. 143-215.67(a), the Environmental Management
Commission may authorize a unit of government to accept additional
wastes to its waste —disposal system upon a finding that the unit of
government has secured financing for planning, design, and/or
construction of a new or improved waste—disposaL system which will
adequately treat the additionaL waste and the additional waste wiLL
not result in significant degradation in the quality of waters
uLtimateLy receiving such discharge;
NOW THEREFORE BE IT
RESOLVED, that the City of Wilmington hereby requests the
Environmental Management Commission to grant a Specia.L Order by
Consent and the City of Wilmington agrees to enter into and abide by
this Special Order by Consent as stipulated as foLLows:
1. That the SpeciaL Order by Consent shall expire on March 1,
1987;

-2-
2. That until the expiration of the SpeciaL Order by Consent,
the permitted BOD5 effluent Limitations of the Northside
Plant shaLL be 47 mg/L as a monthly average;
3. That the City of Wilmington wiLL continue with chemical feed
to enhance the treatment capability of the Northside Plant
and shaLL endeavor to make every effort to have the
effluent's monthLy average for BOD5 be as close as possible
to 30 mg/L;
4. That maintenance painting of the PLant's major facilities
wiLL be completed no Later than January 1, 1987;
S. That the City holds North Carolina NPDES Permit No.
NCO023965 for operation of an existing wastewater treatment
works (the Northside PLent) and making an outlet therefrom
for treated wastewater to the Cape Fear River, but is unabLe
to comply with the effluent Limitations for BOD5, as set
forth in the City's 201 plan to protect water quaLity
standards. Compliance wiLL require preparation of pLans
and specifications for and construction and operation of
additional treatment works;
6. That non—compliance with fineL affluent Limitations
constitutes causing and contributing to poLLution of the
waters of this State named above, and the City is within the
jurisdiction of the Environmental Management Commission as
set forth in Chapter 143, ArticLe 21 of the North Caro Lino
General Statutes,'
7. That the City desires to cause or aLLow the discharge of
678,865 gpd of edditionaL wastewater to the treatment works,
and that the discharge of such edditionaL wastewater from
the treatment works of the waters of this State will not
resuLt in any significant degradation in their quality or in
the quality of any water uLtimateLy receiving such
discharge;
8. That the City has secured financing for pLanning 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 City wiLL be able to
comply with final permit effluent Limitations;
9. In accordance with the provisions of the North Carolina
General Statute 143.215.67(b) the Environmental Management
Commission aLLows the City to accept the additional
residential waste specified below, or an equivalent number
of housing units, to its waste —disposal system:

ORO
NAME
Long Ley IndustriaL Tract
First Union National Bank
307 So. CoLLege Rd,
Cambridge Square Apts.
Burnt MILL Creek Business Park
Colonial Village Apts.
Smiths Creek Industrial Park
Fairfax
Twelve Oaks Apts.
College Road Office BLdgs.
General Residential Development
& SmaLL Projects (ALready Approved)
TOTAL
GPD
625
300
54,720
25,000
72,000
100,000
23,040
53,280
10,125
339,775
UNITS
25 employees
12 empLoyees
152 units
N/A
200 units
N/A
64
196
N/A
967
1 , 579
10, That no requests for sewer system extensions tributary to
the Northside Plant shall be approved by the City of
Wilmington until this Special Order by Consent is approved;
11. That the headworks analysis required under the pretreatment
program be compLeted by March 1, 1987;
12, That John Bauer, Director of -Public Utilities, shall be
authorized to act on and behalf of the City of Wilmington in
aLL matters related to this SpeciaL Order of Consent;
13, Any vioLgtian of terms of the SpeciaL Order of Consent
subjects the City —to enforcement authority of the Commission
and the Director pursuant to North CaroLina General Statute
143.215.6 and Commission rules in 15 NCAC 2J.
Adopted at a regular meeting
an October 7, 1906
Mayor
CERTIFIED TO SE A TRUE COPY
CITY CLERK

_ LARGE SERVICES & ALREADY_APPROVED
-
�EYLEH_�YS�EL�_EXT
EN S I ON S
The following is a
list of Large
services and aLready
approved
sewer system extensions,
i.e., those
holding approved state
permits,
which are either in the
process of being
constructed or may
be
constructed prior to March
1, 1987.
ALL are tributary to the
Northside Plant. NOTE:
March 1, 1987, but it
ALL wiLL probabLy not be constructed
prior to
is
proceed.
difficult to
estimate which projects
wiLL not
NAME
TYPE
UNITS
GPD
Howard Johnson Motel
Caroline Savings & Loan
Service
129 rooms
15,480
Victoria Place
Service
Mains
50 employees
1,250.
Schaeffer Buick
Service
100
50 employees
36,000
1,250
University Landing
Pinewood Apartments
Service
62,625 sq. ft.
7,515.
Birch Creek
Mains
Services
25
100
9,000
CandLewyck Condos
Mains
104
27,000
31,200
Conifer Gten
Courtyard
Mains
72
21,600
Hawthorne PLace
Mains
Service
84
39
22,680
LuLLwater ViLLage
Mains
47
14,040
Sunnaire
Mains
132
16,920
47,520
Tara Court
Colony Woods
Mains
70
25,200
Foxwood
Services
24
8,640
St. Mary's PLace
Services
Services
35
35
9,450
Twinwood
Mains
100
9,450
24,000
Crossroads Center
Hampton Inn
Services
Offices
7,580
Services
Restaurant
4,000
TOTAL
967 339,775