NC0048429_Wasteload Allocation_19910228

Facility Status: Existing
Permit Status: Renewal
Major Minor
Pipe No.: 001
Design Capacity: 0.005 MGD
Domestic (% of Flow): 100 %
Industrial (% of Flow):
Comments:
DRAFT REQUES
PERMIT NO.: NC0048429
irDEs WASTE LOAD ALLOCATION
PERMITFEE NAME: David L. Curl & Harold M. Williams / Cedar
PicitfterMaAST'S
Cc4,Creek.
RECEIVING STREAM:
Class: C-NSW
Sub -Basin: 03-06- , () (o per rt or,
Reference USGS Quad: D22NE
County: Chatham
Regional Office: Raleigh Regional Office
Previous Exp. Date: 7/31/91 Treatment Plant Class: 1
Classification changes within three miles:
No change within three miles.
Requested by:
Prepared by:
Reviewed by:
Mack Wiggins
I x'"`
Sc0
Bops 5` g. S)-
wQ\Et_
3.1)
(please attach)
el 4
Date: 12/4/90
Date:
Date: Z.
Modeler
Date Rec.
#
5 A. S
17,141 9 o
5- SS
2 Drainage Area (mi) Q.
Avg. Streamflow (cfs): b . 1
7Q10 (cfs) p Winter 7Q10 (cfs) p 30Q2 (cfs) 0
Toxicity Limits: IWC % Acute/Chronic
Instream Monitoring:
Parameters .D0/ T •+� Cv nd c G L Co 1; �a r.i-.
Upstream ✓ Location al.," crr"sch,ee
Downstream ✓ Location /UC J55 So I
Jsr 3 vecus
Effluent
Characteristics
(f
sL„ ,.`,,, e,
(l3"
,c4...„
C
Uri w,4e/
/b
BOD5 (mg/1)
15
17
NH3-N (mg/1)
7
da
i
/. ,
D.O. (mg/1)
Co
4'
(0
TSS (mg/1)
30
36
36
3 0
F. Col. (/100 nil)
goo
goo
.00
a00
pH (SU)
6 ^ q
., 41
b -1
CD ...1
Cktorine Cmg t C)
.%tow for
. b 17
COMMENTS
Zero flow policy: Recommend removal of discharge.
Renew with above limits for 3 years. Facility must submit an engineering
proposal within 12 months evaluating alternatives to discharge. If no
feasible alternatives, limits will change after 3 years to 5(10) and 1(1.8)
for BOD5 and NH3-N (summer/winter). Instream monitoring may be dropped
after facility agrees, in writing, to a schedule for removal.
Facility will receive letter addressing chlorine toxicity.
Comments: Perri it .Should Cor,-ht'i yr p 5i k-
akA (b Crek,k. (ems reebet)

A‘e
Request No.: 5958
WASTELOAD ALLOCATION APPROVAL FORM
Facility Name:
NPDES No.:
Type of Waste:
Status:
Receiving Stream.
Classification:
Subbasin:
County:
Regional Office:
Requestor:
Date of Request:
Quad:
Fecal
Wasteflow (mgd) :
BOD5 (mg/1):
NH3N (mg/1) :
DO (mg/1) :
TSS (mg/1) :
coliform (#/100m1) :
pH (su) :
Chlorine (mg/1) :
Toxicity Testing Req.:
Cedar Village Apartments
NC0048429
Domestic
Existing/Renewal
C-NSW
306, 4'O
Chatham
Raleigh
Mack Wiggins
12/4/90
D22NE ✓
RECOMMENDED EFFLUENT
EXISTING
summer
0.005
15
7
6
30
1000
6-9
monitor
none
winter
0.005
17
12
6
30
1000
6-9
monitor
MONITORING
Drainage
Summer
Winter
Average
LIMITS
area:
7Q10:
7Q10:
flow:
30Q2:
0.1 0 s mi .l
0.0 fs o
0.00 fs G
0.20 fs ,1
s
PROPOSED
summer winter
0.005 0.005
15 17
7 12
6 6
30 30
200 200
6-9 6-9
monitor monitor
Upstream (Y/N): Y Location:above discharge
Downstream (Y/N): Y
r`J�
±6
Locationtil/es til/es downstream
Nc /S-So!
COMMENTS
Facility meets all existing limits; instream data questionable.
ZERO FLOW POLICY: Recommend removal. Facility must submit an engineering
report within 12 months evaluating alternatives to discharge. If there are
no alternatives, limits will change after 3 years to 5(10) & 1(1.8) for
BOD5 & NH3-N for summer (winter). Instream monitoring may be dropped when
the facility agrees, in writing, to a schedule for removal.
Facility will receive letter addressing chlorine toxicity.
Recommended by:
Reviewed by
Instream Assessment:
sc
6,
Date:
42/7/,c)
Date: 1410(10
�• � /
Regional Supervisor: `u-µJ ate:
Permits & Engineering: Date: 212G,-4r
RETURN TO TECHNICAL SUPPORT BY:
JAN081991

Cedar Vit e_Ap s:_
CC.
•C 24...) Few - Lcovs-.w�R _.� ._ r-€ - vc,..l
C 1-k (..a Q + NE
fy stic,L,_J le_ rcv+o C, C
f
ti
G AJ a/3s/3L
03 - 06 -'
m6p

INSTREAM SELF -MONITORING DATA
MONTHLY AVERAGES
Discharger: C12d4 r V,Ii&y
Receiving Stream: tJr
Upstream Location:
DATE TEMP
DEC-90
NOV-90
OCT-90
SEP-90
AUG-90
JUL-90
JUN-90
MAY-90
APR-90
MAR-90
FEB-90
JAN-90
DEC-89
NOV-89
OCT-89
SEP-89
AUG-89
JUL-89
JUN-89
MAY-89
APR-89
MAR-89
FEB-89
;TAN-8 9
DEC-88
NOV-88
OCT-88
SEP-88
AUG-88
JUL-88
JUN-88
MAY-88
APR-88
MAR-88
FEB-88
JAN-88
DEC-87
NOV-87
OCT-87
SEP-87
AUG-87
JUL-87
JUN-87
MAY-87
APR-87
MAR-87
FEB-87
JAN-87
Permit No.: NCO() yl (Z
Po � Sub -basin: 0 3 ^oCo
r
LS Downstream Location
Upstream
D.O. BOD5 COND
l2l0
td=
Downstream F400V--
TEMP D.O. BOD5 --
!8_

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, Governor George T. Everett, Ph.D.
William W. Cobey, Jr., Secretary Director
February 27, 1991
Harold Williams
Cedar Village Apartments
P.O. Box 429
Carrboro, NC 27510
Subject: Chlorine Toxicity
NDPES Permit No. NC0048429
Chatham County
Dear Mr. Williams:
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 may be toxic to aquatic
life in the receiving stream under low flow conditions, i.e., the amount of chlorine discharged causes
an exceedance of the instream action level for chlorine (17 ug/1 for chronic effects and 28 ug/1 for
acute effects) under 7Q10 conditions (the lowest average daily 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 instream waste concentration of 100%, an acceptable
level of chlorine in your effluent is 17 ug/1 or 0.017 mg/l. 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]
An Equal Opportunity Affirmative Action Employer

v•
-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 facilities with chlorine
problems. If the chlorine levels in your facility's effluent remain unchanged, a chlorine limit or
whole effluent toxicity requirement may be added to your permit limitations.
Please feel free to call Tim Donnelly of the Division's Regional Office at [phone] if you
have any questions or comments regarding this issue.
Sincerely,
teve W. Tedder
Water Quality Section Chief
SWT/eaj
cc: Raleigh Regional Office
Central Files
Pollution l'revention Pays
P.O. Box 27687, Raleigh, North Carolina 27611-7687 Telephone [phone]
An Equal Opportunity Affirmative Action Employer