NC0025861_Toxicity Monitoring_19950630

July 9, 1993
MEMORANDUM
TO: Lowell WLA File
FROM: Jackie Nowell
SUBJECT: Permit Reopener for Toxicity Test
Per a request from Susan Robson of P&E,reviewed toxicity monitoring
requirement for the subject facility. The MRO has requested that Lowell's permit be
reopened to include a toxicity limit. Lowell had been under administrative letter for an
acute target of 74%LC50(Daph or Cerio)on a quarterly basis. The recommendation per
C. Lowe for the reopener was acute toxicity monitoring on a monthly basis, and Susan was
trying to verify whether this was correct.
Talked with Kristy Robinson of AQ TOX. After consultation with Larry Ausley,
she called with the following recommendations.
1)Larry prefers a quarterly test for acute toxicity
2)The LC50 may at no time be.74%. Upon a single failure,they are out of
compliance.
3)Also include Delta Language: Upon a single failure,must begin monthly
monitoring until such time that a single test is passed. Upon passing,quarterly
testing is reinstated.
I have completed an acute toxicity limit form to be included in the NPDES permit and have
forwarded to Susan. (see attached copy).

Facility Name _City of Lowell WWTP Permit#NC0025861 _Pipe#001 _
ACUTE TOXICITY PERMIT LIMIT (QRTRLY)
The permittee shall conduct acute toxicity tests on a quarterly basis using protocols defined as definitive in E.P.A.
Document 600/4-85/013 entitled "The Acute Toxicity of Effluents to Freshwater and Marine Organisms." The
monitoring shall be performed as a Daphnia pulex or Ceriodaphnia 48 hour static test,using effluent collected as a
24 hour composite. The LC50 of this effluent using the previously stated methodology may at no time in any
toxicity test be less than_74_%. Effluent samples for self-monitoring purposes must be obtained during
representative effluent discharge below all waste treatment.The first test will be performed after thirty days from
the effective date of this permit during the months of_FEB MAY AUG NOV .
The parameter code for this test if using Daphnia pulex is TAA3D. The parameter code for this test if using
Ceriodaphnia is TAA3B. All toxicity testing results required as part of this permit condition will be entered on the
Effluent Discharge Monitoring Form(MR-1)for the month in which it was performed,using the appropriate
parameter code. Additionally,DEM Form AT-1 (original)is to be sent to the following address:
Attention: Environmental Sciences Branch
North Carolina Division of
Environmental Management
4401 Reedy Creek Road
Raleigh, N.C. 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 single quarterly monitoring indicate a failure to meet specified limits,then monthly monitoring will
begin immediately until such time that a single test is passed. Upon passing,this monthly test requirement will
revert to quarterly in the months specified above.
Should any test data from either these monitoring requirements 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.
7Q10 124 cfs
Permitted Flow 0.6 MGD R- :mmended by:
IWC 0.74 %
Basin & Sub-basin CTB35 azi-,* A.
Receiving Stream S.F. Catawba River
County Gaston Date /9/93
QAL Daphnid 48 Version 10/91

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DIVISION OF ENVIRONMENTAL MANAGEMENT
July 29, 1992
MEMORANDUM TO: Steve Tedder
FROM: D. Rex Gleason
SUBJECT: Toxicity Reopener
City of Lowell
NPDES Permit No. NC0025861
Gaston County
Regarding your memorandum dated July 23, 1992, the draft
permit for the subject facility was reviewed by personnel of this
Office in June of 1991. At that time, the facility had reported
only two failed toxicity tests since January of 1990, one being
for February of 1990, the other for May of 1991. It is presumed
that two failures in that time frame were not considered to be
significant enough to cause inclusion of toxicity monitoring on
the draft permit. However, after the draft was reviewed, the
City's toxicity test results have indicated more of a problem.
We do not think it was our lack of review of pertinent
information that has caused us to request that the permit be
reopened and we would like to express our concern to this
accusation. While we realize that the Permitting staff is
extremely busy trying to catch up on their backlog, we do believe
it is our responsibility to make them aware of our concerns; and
in this case do not think we should be accused of failure to
properly review the draft permit, etc.
Ifyouhave any questions, please advise.
cc: Coleen Sullins
Do Safrit
evor Clements
Brenda Smith

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NPDES WASTE LOAD ALLOCATION
r
PERMIT NO.: NC0025861 Modeler Date Rec. # ��
Cityof Lowell/ Cityof Lowell WWTP S 5�ro �1 leLzlo ,
PE NAME: Drainage Area(mit ) 6 3.1t7 Avg. Streamflow (cfs): FOD
Facility Status: Existing Permit Status: Renewal 7Q10 (cfs) /24 Winter 7Q10(cfs) 26 30Q2 (cfs)
Major Minor Toxicity Limits:IWC --4 Acute/Chronic
Pipe No.: 001 Instream Monitoring:
Design Capacity:Ca aci : 0.6 MGD Parameters //-
Domestic (% of Flow): 100% Upstream Location
Industrial (% of Flow): Downstream Location
Comments: Effluent
pretreatment information attached Characteristics Summer/W/14 Winter-
Refer : Basinwide / Streamline WLA File
Completed By Permits & Engineering BODS (mg/1) 30. O ori
---)
At Front Of Subbasin NH3-N (mg/1)
YVy
RECEIVING STREAM: South Fork Catawba River - D.O. (mg/1)
Class: WS-III
TSS (mg/1) 3o.o
Sub-Basin: •03 - D 3- be, - 30
Reference USGS Quad: F 14 SE (please attach) F. Col. (/100 ml) t00. 0
County: Gaston pH (SU)
4.o D
Regional Office: Mooresville Regional Office
Previous Exp.Date: 10/31/91 Treatment Plant Class: Class II �I-P6 f//) : /yM/ y
Classification changes within three miles: TA/(Milt)
Mft Mril .
none
ahin'ig;,ty//).' ✓y/SYI1 WV
Requested by: Rosanne Barona Date: 5/6/91 '
Prepared by: Date: W/Z `//
mments: 'C,QGc.�I/Ytil Lw Ct ..Q —06n91;htrii .
Reviewed by: cf:e
Date: �Q l Cl l
SGivv/dL po t 1/14, r -i- U
L__ 6//17/9/ ' 1 ) `0 r,
i c.)446-7._ 0)(2 4 '41' Di Etza 0
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FACT SHEET FOR WASTELOAD ALLOCATION N. C. DEPT. OF NATURAL
RESOU RCT: .ivD
Request# 622&mMUNITYr ti• ,n
Facility Name: Town of LowelljTown of Lowell WWTP MAY 2 9 1991
NPDES No.: NC0025861
Type of Waste: Domestic- 100% NYtS1�N OF EXMpKIOTAI NANAiENENI
Facility Status: Existing COMMMONpFFICE
Permit Status: Renewal
Receiving Stream: South Fork Catawba River
Stream Classification: WS-III
Subbasin: 030836
County: Gaston Stream Characteristic: estimated from
Regional Office: 6/It-Mooresville Regional Office USGS # 02.1451.1200
Requestor: Barona Date: 1985
Date of Request: 5/6/91 Drainage Area(mi2): 630
Togo Quad: F14SE Summer 7Q10(cfs): 124
Winter 7Q10(cfs): 226
Average Flow (cfs): 800
30Q2(cfs):
Wasteload Allocation Summary
(approach taken,correspondence with region,EPA,etc.)
Limits should remain the same for this permit with the exception of the fecal coliform limit which
was changed to 200/100 ml.
Special Schedule Requirements and additional comments from Reviewers:
Recommended by: DA„,t Date: 5 2 Z /
Reviewed by
Instream Assessment: Date: 5/a3/ /
Regional Supervisor: �. Date:J0+0_
� P
Permits&Engineering: � Date: CtPirtr
RETURN TO TECHNICAL SERVICES BY: JUN 2 2 1991

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PARAMETERS
Existing Limits:
Monthly Average
Wasteflow(MGD): 0.6
BOD5(mg/1): 30.0
NH3N(mg/1): monitor
DO(mg/1):
TSS (mg/1): 30.0
Fecal Col. (/100 ml): 1000.0
pH (SU): 6.0-9.0
Oil&Grease (mg/1):
TP(mg/1): monitor
TN(mg/1): monitor
Residual Chlorine (µg/1): monitor
Recommended Limits:
Monthly Average
Wasteflow(MGD): 0.6
BOD5(mg/I): 30.0
NH3N(mg/1): monitor
DO(mg/1):
TSS (mg/1): 30.0
Fecal Col. (/100 ml): 200.0
pH (SU): 6.0-9.0
Oil&Grease(mg/1):
TP(mg/1): monitor
TN(mg/1): monitor
Residual Chlorine (14/1): monitor
Limit Changes Due To: Parameters Affected
Change in 7Q10 Data
Change in stream classification Fecals
Change in wasteflow
Failing toxicity test
Other

TOWN OF LOWELL - Allowable Waste Concentrations
.
Residual Chlorine Ammonia as NH3
7Q10 (CFS) 124 7Q10 (CFS) 124
DESIGN FLOW(MGD) 0.6 DESIGN FLOW(MGD) 0.6
DESIGN FLOW(CFS) 0.93 DESIGN FLOW(CFS) 0.93
STREAM STD (UG/L) 17.0 STREAM STD (MG/L) 1.0
UPS BACKGROUND LEVEL(UG/L) 0 UPS BACKGROUND LEVEL(MG/L) 0.22
IWC (%) 0.7444169 IWC (%) 0.744417
Allowable Concentration(ug/I) 2283.6667 Allowable Concentration(mg/I) 105
NC0025861 DAG 5/22/91

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• DISCHARGE SERIAL NUMBER
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FOR AGENCY UfU
14. Description of Inflvsnt and tNlwet(see Inftructlom) 111111111M
finfluent 1 Effluent
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Parameter and Code
21 4 � < < al I>! Z >
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(1) (2) (3) (4) (5) (6) (7)
Flow
! . / I
Million gallons per day
50050 11725 . 1253 .2465 1/1 254 C
pH
Units
00400 6.4 7.8 ` 2/30' 24 G I�
Temperature(winter)
- 1
' F
74028 56 ' 61 1/7 52 G f
Temperature(summer)
' F
7407 69 84 1/7 ,52 G
Fecal Streptococci Bacteria
Number/100 m1
74054
. .
(Provide if available)
Fecal Coliform Bacteria
Number/100 ml
74056 .4 L• 2050 2/30 24 G
(Provide if ay.ilable)
Total Coliform Bacteriao
Number/100 ml
740564 Pi V.. ' . .
(Provide if available)
BOD 3-day
mg/1
00310 199 16.9 2.85 49.95 2/30 24 C
Chemical Oxygen Demand(COD)
mg/1
00340
(Provide if available)
OR
Total Orpnic Carbon(TOC) .
rK/1
006110
(Provide if available)
• (Either analyis is acceptable) s
Clklotnne—ToW Residual
mng/I
50060
.302 . 145 .463 1/1 254 G •
II-S
4ms

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DISCHARGE SERIAL NUMBER
FOR AGENCY us
001
I1I1ITI
14. Da$IMPUes N IsftlUIot SRI£Mtwwt(aM Iwatructlarls) (Cantinued)
Influent
Effluent
Puente ter and Code f
g
•
ii <> _ < 11111
(1) (2) (3) (4) (S) (6) (7)
Total Solids
mel
00500 •
Total Dissolved Solids
m6/1
70300
Total Suspended Solids
00530 170 17.7 1.0 53.1 2/30 24 C
Settleable Matter(Reidue)
m1/1
00545
Ammonia(as N)
my1
00610 5.46 0.00 11.50 1/30 - 12 C
(Provide if available)
Kjeldahl Nitrogen
mg/1
00625
(Provide if available)
•
Nitrate(as N) • •
m=/I
00620
(Provide if availabkl
Nitrite(as N)
sas/l
00615
(Provide if available)
Pbospboms Total(u P)
w1
00665 .603 .360 .700 4/365 ' 3 C
(Provide if available)
Dissolved Oxy(DO) •
ms/1
00300
.

NPDES PREITREAIMENT INFORMATION REQUEST FORM
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FAC TUTY NAME: L�, `L<- 0 f 0 0 f L f NPDES NO. NCO() �_
REQUESTER: SQ t.:, c j'ottc DATE: V / /G / ?/ REGION: ;WO OIrPSG i ll�'_
PERMIT COND TIONS 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 —1—/—
Additional Conditions
(attached)
This facility is currently implementing a pretreatment program.
Please include the following conditions:
Program Implementation
Additional Conditions
(attached)
SIGNIFICANT INDUSTRIAL USERS' (SIUs) CONTRIBUTIONS
SIU FLOW — TOTAL: MGD
- COMPOSITION: TEXTILE: MGD
METAL FINISHING: MGD
&rL 12cchAjt/l� e el..� Oc 'te INAOo�lel'S lel([Q MGD
-s�Ja�,,e `� ( 14-e
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Y ,( ce, Lf Lowe l� - Cie i�.ccC i�G "ROA- MGD
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T4- u).4A Ii(! Co ovtc.--e- 41AR L
) TRIAL % REMOVAL
4)46 � ,• ,�,,t e e
celk 1-014,42(t Ve (1 144;11A4
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REC,E IVSD: q , i Lea REVIEWED BY: ALA'L, 111,1,'
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