NC0062481_Wasteload Allocation_19900314

NPDES WASTE LOAD ALLOCATION
PERMIT NO.: NC0062481
PERMITTEE NAME: Mid South Water Systems, Inc. / Mallard Head
C000.u., N �► �•s
Facility Status: Existing
Permit Status: Renewal
Major Minor
Pipe No.: 001
Design Capacity: 0.02 MGD
Domestic (% of Flow): 100 %
Industrial (% of Flow):
Comments:
refer: Basinwide / Streamline WLA file
at front of subbasin
RECEIVING STREAM:
Class: WS-Ill and B
an unnamed tributary to Reeds Creek
Sub -Basin: 03-08-32
Reference USGS Quad: E15SW (please attach)
County: Iredell
Regional Office: Mooresville Regional Office
Previous Exp. Date: 7/31/90 Treatment Plant Class: Class II
Classification changes within three miles:
Davidson Creek - from source to Lake Norman, Catawba River Class
C
Requested by:
Prepared by:
Reviewed by:
Lula Harris
/ `3
Date: 12/19/89
Date:
Date: J//4//
Modeler
Date Rec.
#
syeiS
I-4-m1 s5
S5253
1 t 2 `
Drainage Area (mi ) / g
Avg. Streamflow (cfs):. / ?
7Q10 (cfs) O Winter 7Q10 (cfs) 0 5— 30Q2 (cfs) _y
Toxicity Limits: IWC /DO % Acute
Instream Monitoring:
Parameters T w p
Upstream }/
Downstream -/
i':C,C'.d1 Kam/ �C-•S
Location /CD 9- asi,e / '-
Location S'/1 /// `1 _
Effluent
Characteristics
Summer
Winter
BOD5 (mg/1)
/ g
NH3-N (mg/1)
/ d v
/ Sl G�.
D.O. (mg/1)
TSS (mg/1)
O
F. Col. (/l00 ml)
U0
pH (SU)
6 _ 1
NCO,— e.>$ tS/PQarm
.
4P
OTEEE1
Comment c:/z,. Ar s r!Gcoiez �� ee.-1 e40
T
. -11 d-2cE 0/Zola e�'thz€4.:t` �/CO' /e57-.

RECLIVED
MAR 13 1990
C.
• OF ivit
C011tirri CFS 4,,,� L
Request No.: 552ta'
WASTELOAIp PROVAL FORM
Facility Name: Mallard Head Condominiums
NPDES No.: NC0062481 MCUREsI; E REj 'T
Type of Waste: Domestic OFFICE
Status: Existing/Renewal
Receiving Stream: UT to Reeds Creek
Classification: WS-III, B
Subbasin: 30832 Drainage area: 0.180 sq mi
County: Iredell Summer 7Q10: 0.00 cfs
Regional Office: MooresvillelH Winter 7Q10: 0.05 cfs
Requestor: Lula Harris Average flow: 0.19 cfs
Date of Request: 12/19/89 30Q2: 0.08 cfs
Quad: E15SW
RECOMMENDED EFFLUENT LIMITS
EXISTING PROPOSED
summer winter
Wasteflow (mgd): 0.020 0.020
BOD5 (mg/1) : 18 18
NH3N (mg/1) : 11 * 1 1.8
DO (mg/1) : 6 6
TSS (mg/1) : 30 30
Fecal coliform (#/100m1): 200 200
pH (su) : 6-9 6-9
Toxicity Testing Req.: none *
MONITORING
Upstream (Y/N): Y Location:100 ft above effluent
Downstream (Y/N): Y Location:SR 1114
COMMENTS
Zero 7Q10. Positive 30Q2.
Compliance data okay. Instream DOs low occassionally (4-5 mg/1).
Change downstream monitoring site. Monitor instream for Temperature, DO,
Conductivity, and Fecal Coliform.
Facility has choice between above NH3-N limits or whole effluent toxicity
testing. Possible chlorine toxicityLra mil/Wax:v.4 Ltz ).
Recommended by: r% ---
Date: o2/a 3/7
Reviewed by /I
Instream Assessment: PLL )Oyt 0u&9-6Date: Ia3 0
Regional Supervisor: j}�G 1;t , 1. `�rn�` Date: ', 1 � '1,
Permits & Engineering: 9, Date: 3rf30
MAR 2 8 1990
RETURN TO TECHNICAL SERVICES BY:

10/89 '' LL
Facility Name Mallard tt s Permit # N60 0 (Q 2.y$ /
CHRONIC TOXICITY TESTING REQUIREMENT (QRTRLY)
The effluent discharge shall at no time exhibit chronic toxicity in any two consecutive toxicity tests,
using test procedures outlined in:
1.) The North Carolina Ceriodaphnia chronic effluent bioassay procedure (North Carolina Chronic
Bioassay Procedure - Revised *September 1989) or subsequent versions.
The effluent concentration at which there may be no observable inhibition of reproduction or
significant mortality is 9q % (defined as treatment two in the North Carolina procedure
document). The permit holder shall perform quarterLv monitoring using this procedure to establish
compliance with the permit condition. The first test will be performed after thirty days from
issuance of this permit during the months of V •13 MaY, hu&, NOV . Effluent
sampling for this testing shall be performed at the NPDES permitted final effluent discharge below
all treatment processes.
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 parameter
code TGP3B. Additionally, DEM Form AT-1 (original) is to be sent to the following address:
Attention: Environmental Sciences Branch
North Carolina Division of
Environmental Management
P.O. Box 27687
Raleigh, N.C. 27611
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 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.
7Q10 0 cfs
Permited Flow . o a MGD
IWC% je,o
Basin & Sub -basin 63 - OR- 3 z
Receiving Stream trr + steeds Cre.Lk
Countyede.0
Recommended by:
Date
*Chronic Toxicity (Ceriodaphnia) P/F at 11 %, Fea, MW( YV6i NDVSee Part 3 , Condition I-(
k&5 C tto c2 06wcer% covtinoNuc._ 1c.ti; ( 1 //. t /I) 6 2 -xr c..(41 S i j .

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L r {-c> Crce, EL)
r,1e,w u i. Z (Z 1 U -
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Low
rre .� 4-4p o
VI_ s-,ele.ci,w` T
_ S tti.h l.wt2r
we 1,2
C.k.o 14-t-
x. 4+.
�l.Z1/90
03 -0 -32-
C� C►F e_K,p0,.,4. 5-/I (o if, ),
5 l 0l Pizzwt
5f, C c 5 / v 1 `kw wt v\n,;±b ~.j
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Po 5sn (i CSA,6 , 415x« 1

INSTREAM SELF -MONITORING DATA
MONTHLY AVERAGES
Discharger: M4,464 tread Condos Permit No. : NCOOf� ��
Receiving Stream: u-t- -, Reer15 C'_ree4( Sub -basin: p -/4- 3
Upstream Location: loo 4. Downstream Location goo f4
Upstream
DATE TEMP D.O. BOD5 COND TEMP D.O. B0D5 COND
DEC-89 S S (16.) 45 S 5 tl ( S
N O V- 9 (Z q_ i t z- __a__
CCT-89 __ 140 ice
SEP-89 S
_F_ _V�. 1v?S tic (57
AUG-89 �A �• rv. --/T7
I 2S'78
JUL - 8 9aa.d_ --l-q 10,
J UN - 8 9 1 �- 10 2-
MAY-89 �o. 17,717G�
APR-89 bG. - 4) a.ld- f 7 5-C.V) q.q
MARL89 �` �. Z A 7.?- -� 2' W.
FEB-89 — 6 (5) 7t7 r. c6.8
JAN-89 _a_ 4.11/4f
DEC-38
NOV - 3 3
OJT-38
SEP-28
AUG- � 8
JUL-38
JUt,-88
MAY-88
APR- 38
MA_..-88
FEE-38
JAN-88
DEC-87
NOV-87
OCT-37
SEP-87
AUG-87
JUL-87
JUN-87
MAY-87
APR-87
MAR-87
FEB-87
JAN-87
DEC-86
NOV-86
OCT-86
SEP-86
.AUG-86
JUL-85
JUN-86
MAY-86
APR-86
MAR-86
FEB-86
JAN-86
Downstream
a.o

DIVISION OF ENVIRONMENTAL MANAGEMENT
July 20, 1990
TO: Dale Overcash
Permits and Engineering
FROM: Betsy -Johnson*
Technical Sup
THROUGH: Carla Sanderson
Trevor Clements
SUBJECT: Amendment to Mallard Head Condominiums permit.
NPDES Permit No. NC00062481.
Iredell County
Mallard Head Condominiums received a new permit effective
July 1, 1990. The permit contained ammonia limits of 1 mg/1 (summer)
and 1.8 mg/1 (winter) as daily maxima. The limits should remain
intact but should be monthly averages.
The facility also received a toxicity testing requirement by
mail. They have been informed verbally to disregard this
requirement.
Please provide Mallard Head with written confirmation of the
above and change the permit to reflect the monthly average ammonia
limits.
cc: Rex Gleason
Central Files

MEMO
TO:
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C," (NG er � / v f W�''�
I ��Jas kreed ` '"
DATE: 7 1 a p
SUBJECT:
recei deb b y Atd i 1. 7�e
?re leis �'�.e ►„wo .a l; 1 f
in
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No
rth Carolina Department of Environment,
Health, and Natural Resources

State of North Carolina
Department of Environment, Health, and Natural Resources
Division of Environmental Management
512 North Salisbury Street • Raleigh, North Carolina 27611
James G. Martin, Govemor George T. Everett Ph.D.
William W. Cobey, Jr., Secretary June 1, 1990 Director
Jerry H. Tweed
Mid South Water Systems/Mallard Head Condominiums
C/O P.O. Box 127
Sherrills Ford, NC 28673
Subject: Chlorine Toxicity
NPDES Permit No. NC0062481
Iredell County
Dear Mr. Tweed:
Chlorine, a widely used wastewater disinfectant for the
treatment of coliform organisms, often remains instream in residual
amounts that may prove to be toxic under critical low stream flow
conditions. In the last decade, EPA assessed the potential adverse
effects of chlorine to the aquatic environment and has taken steps to
reduce the impacts through the development of federal criteria. In
1986, EPA recommended that all states have a chlorine standard by
their next triennial review of water quality standards.
In revising its water quality standards in 1989, North Carolina
developed an action level for chlorine of 17 ug/1 (freshwater classes
only). In addition, the fecal coliform limit was reduced from 1000
colonies/100 ml to 200 colonies/ 100 ml. Under a new DEM procedure,
dechlorination and chlorine limits are now recommended for all new or
expanding dischargers proposing the use of chlorine for effluent
disinfection. The Division is reviewing chlorine levels from all
existing dischargers as part of their NPDES permit renewal process.
Our records indicate that chlorine from your facility's effluent
discharge is considered toxic to the receiving stream under low flow,
conditions, i.e., the amount of chlorine discharged causes a
violation of the instream action level for chlorine (17 ug/l) under
7Q10 conditions (the average flow for seven (7) consecutive days
during a ten (10) year period). Action should be taken to reduce the
effluent concentration of chlorine to an acceptable level. Based on
your facility's instream waste concentration of 100% an acceptable
level of chlorine in your effluent is 17 ug/1. If this level is not
feasible, you should consider dechlorination or alternate methods of
disinfection for your facility to ensure that both chlorine and
bacterial limits are met. In addition, if your facility plans to
undertake any phase of construction, dechlorination or alternate
disinfection should be included. However, please note that an
authorization to construct must be obtained from this Division prior
to_any alteration to your treatment plant.
Pollution Prevention Pays
P.O. Box 27687, Raleigh, North Carolina 27611-7687 Telephone [phone]

-2-
The Division is currently reviewing its water quality
regulations pertaining to chlorine. In the future, effluent limits
and/or dechlorination may be required of existing facility's with
chlorine problems. If the chlorine levels in your facility's
effluent remain unchanged, a chlorine limit or a whole effluent
toxicity testing requirement may be added to your permit limitations.
Please feel free to call Rex Gleason of the Division's Regional
Office at [phone], if you have any questions or comments
regarding this issue.
Sincerely, &
Steve Tedder
Water Quality Section Chief
cc: Mooresville Regional Office
Central Files
WLA File