NC0021849_Wasteload Allocation_19910809

PERMIT NO.: NCO021849
PERMITTEE NAME: Town of Hertford
FACILITY NAME: Hertford Wastewater Treatme
Facility Status: Existing
Permit Status: Renewal
Major Minor �l
Pipe No.: 001
Design Capacity: 0.400 MGD
Domestic (% of Flow):
Industrial (% of Flow):
Comments:
POTW
11 ',
NPDES WASTE L
Plant
STREAM INDEX: 30-641)
RECEIVING STREAM: the Perquimans River
Class: C-Swamp
Sub -Basin: 03-01-52
Reference USGS Quad: C33NW, Hertford (please attach)
County: Perquimans
Regional Office: Washington Regional Office
Previous Exp. Date: 12/31/91 Treatment Plant Class: II
Classification changes within three miles:
Ca. 1 mi. to N-S Railway Br. -> SC.
Requested by: Jule Shanklin
Prepared by:
Reviewed by: `
.237
W&AeC_ EL _
Date: 7/ 17/91
Date: Add'lf
Date:
OAD ALLOCATION
Modeler Date Rec. #
5ot oil In350
2
Drainage Area (mi ) T, i Avg. Streamflow (cfs):
7Q10 (cfs) Winter 7Q10 (cfs) 30Q2 (cfs)
Toxicity Limits: IWC % Acute/Chronic
Instream Monitoring: No
Parameters
Upstream Location
Downstream Location
Effluent
Characteristics
Summer ;der
BOD5 (m )
30.0
NH 3 -N (mg/1)
D.O. (mg/1)
TSS (mg/1)
30. Q
F. Col. (/100 ml)
a 00
pH (SU)
6 ` 1
T P�Lor-
TN
ED
Comments: - '

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 ALLOCATIONS
Town of Hertford WWTP
NCO021849
Domestic 100%
Existing
Renewal
Perquimans River
C-Swamp
03-01-52
Perquimans
Washington
Jule Shanklin
7/17/91
C33NW
Wasteload Allocation Summary
RECEIVED
WASHINGTON OFFICE
'JUL 3 1Qg�
Request # 6352
91 AUG -1 PM
Stream Characteristic:
USGS #
Date:
Drainage Area:
Summer 7Q10:
Winter 7Q10:
Average Flow:
30Q2:
Existing limits will protect water quality in the Perquimans River.
Chlorine levels are too high.
Special Schedule Requirements and additional comments from Reviewers:
Tidal
Recommended by: Date: 7/° /11
Reviewed by
Instream
Regional
Permits &
RETURN TO TECHNICAL SERVICES BY:
Date:
Date:
Date:
AUG 21 1991
t). F-, ".

-2-
Existing Limits:
CONVENTIONAL PARAMETERS
Monthly Average
Wasteflow (MGD):
0.4
BOD5 (mg/1):
30.0
N113N (mg/1):
DO (mg/1):
TSS (mg/1):
30.0
Fecal Coliform (/100 ml):
200
pH (Si):
6-9
Oil & Grease (mg/1):
TP (mg/1):
Monitor
TN (mg/1):
Monitor
Recommended Limits:
Wasteflow (MGD):
BODS (mg/1):
NH3N (mg/1):
DO (mg/1):
TSS (mg/1):
Fecal Coliform (/100 ml)
pH (Sin:
Oil & Grease (mg/1):
TP (mg/1):
TN (mg/1):
Limits Changes Due To:
Instream Data
Ammonia Toxicity
Chlorine
Nutrient Sensitive Waters
HQW
New 7Q10 flow data
Special Modeling Studies
New facility information
Monthly Average WQ/EL
0.4
30.0 EL
30.0 EL
200 EL
6-9 EL
Monitor
Monitor
Parameters Affected
Other: (explanation of any modifications to past modeling analysis
including new flows, rates, field data, interacting discharges, etc.)
(See page 3 for Miscellaneous and special conditions if apply)

-3-
MISCELLANEOUS INFORMATION & SPECIAL CONDITIONS
Miscellaneous information pertinent to the renewal or new permit for this
discharge. Include relationship to the Basinwide management plan.
INSTREAM MONITORING REQUIREMENTS:
Upstream: No Location:
Downstream: No Location:
Parameters:
Special Instream monitoring locations or monitoring frequencies:
SPECIAL INSTRUCTIONS OR CONDITIONS
WASTELOAD SENT TO EPA?(Major) _N (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 fits into basinwide plan)
Additional Information attached? (yes or no) If yes, explain attachments. No

WLA Notes
SRB
7/23/91
Town of Hertford WWTP
NCO021849
- Hertford has applied for permit renewal for their 0.4 MGD facility. Over the past two years the facility
has been in compliance. Also, total phosphorous has averaged less than 1 mg/l.
- The receiving stream, Perquimans River, is classified as C-Swamp
- An ambient station 1 mile downstream of the outfall at SR 1336 shows no DO problems over the past
two years. One DO value of 4.6 mg/l was recorded 4/89, but the history of the station indicates that this
is not unusual and is not associated with high BOD concentrations. See below.
- Chlorine levels in the effluent are too high, as much as 1.1 mg/l.
- Effluent from this facility is highly diluted by the Perquimans River. From this and the good condition
of the downstream ambient station it is clear that the existing limits will protect water quality in the
Perquimans River.
- STORET
Retrieval
PERQUIMANS RIVER AT
SR 1336 AT HERTFORD NC
37143
NORTH CAROLINA
PASQUOTANK
SOUTHEAST
030152
DATE
TIME
OR
BOD
WATER
DO
NH3+NH4-
FROM
OF
DEPTH
5 DAY
TEMP
N TOTAL
TO
DAY
MEDIUM (FT)
MG/L
CENT
MG/L
MG/L
82/01/19
1125
WATER
0
1.5
2.0
10.2
.420
82/02/02
1110
WATER
0
.160
82/02/12
1200
WATER
0
1.6
6.0
7.4
82/03/10
1200
WATER
0
1.7
10.0
8.9
82/04/07
1250
WATER
0
2.3
12.0
8.6
.260
82/05/10
1100
WATER
0
3.2
19.0
5.9
.320
82/06/03
1100
WATER
0
4.2
28.0
6.1
.070
82/07/08
1430
WATER
0
3.2
30.0
5.4
.100
82/08/09
1105
WATER
0
1.7
27.0
6.
.050K
82/10/11
1100
WATER
0
2.4
25.0
.130
82/10/11
1100
WATER
0
2.4
20.0
4.5
45
.130
82/11/08
1045
WATER
0
3.6
16.0
7
.080
82/12/02
1130
WATER
0
1.2
19.0
4.9
.380
83/01/10
1100
WATER
0
1.4
8.0
8.5
.160
83/02/02
1110
WATER
0
1.3
8.0
11.0
83/03/08
1055
WATER
0
1.5
13.0
7.5
.150
83/04/14
0900
WATER
0
2.1
15.5
5.1
. 180
83/05/12
1030
WATER
0
3.8
22.0
.140
83/06/24
0645
WATER
0
1.8
25.3
9.5
.440
83/07/18
0815
WATER
0
3.4
28.7
.040
83/08/24
0900
WATER
0
1.4
27.7
.040
83/09/13
0900
WATER
0
1.9
23.0
4.6
.030
83/10/17
0900
WATER
0
1.1
19.9
.030
83/11/21
0830
WATER
0
1.4
12.2
8.4
.030
83/12/12
0845
WATER
0
1.8
10.4
7.3
. 310
84/01/13
0915
WATER
0
1.1
2.0
12.6
.240
84/02/09
0830
WATER
0
5.1
3.7
11.8
.120
84/03/07
0830
WATER
0
1.3
8.4
.240
84/04/25
0940
WATER
0
1.4
15.8
.170
84/05/23
0845
WATER
0
1.7
225
.140
84/06/27
0830
WATER
0
1.8
26..0
.060
84/07/05
0835
WATER
0
2.1
27.5
5.9
.020
84/08/13
0830
WATER
0
1.9
29.5
5.5
.020'
84/09/27
1000
WATER
0
1.3
18.0
6.5
.110
84/10/17
1000
WATER
0
.8
19.0
8.1
.040
84/11/27
1000
WATER
0
1.4
9.0
8.0
.160
84/12/12
1000
WATER
0
1.0
7.0
8.6
.180
85/01/31
1030
WATER
0
1.4
3.0
12.0
.300
85/04/30
1330
WATER
0
3.2
20.0
7.4
.030
85/07/24
1000
WATER
0
1.9
26.0
5.5
85/07/24
1000
WATER
0.327999
.040
85/10/29
1245
WATER
0.327999
1.8
18.0
.7
.180
86/01/02
1120
WATER
0.327999
.5
6.0
.370
86/04/11
1125
WATER
0.327999
1.9
16.0
7.6
.060
86/07/02
1100
WATER
0:327999
2.5
28.0
5.7
.020
86/10/20
1055
WATER
0.327999
1.0
17.0
7.9
.010
87/01/06
1050
WATER
0.327999
6.0
7.7
.280
87/04/30
1245
WATER
0.327999
17.0
8.0
.050
87/07/30
1000
WATER
0.327999
290
�87
.010
87/10/27
1100
WATER
0:327999
16..0
9-5
.010
88/01/25
1030
WATER
0.327999
4.0
10.1
.320
88/04/19
1130
WATER
0.327999
14.0
9.0
.080
88/07/21
1100
WATER
0.327999
27.5
5.9
.070
88/10/03
1100
WATER
0.327999
24.5
6.9
.010
89/01/24
1150
WATER
0.327999
7.0
.230
89/04/10
1200
WATER
0.327999
14.5
4.6
.200
89/07/26
1235
WATER
0.327999
30.0
.040
89/10/19
0945
WATER
0.327999
20.5
6.6
.120
90/01/16
1030
WATER
0.327999
.290
90/01/16
1030
BOTTOM
0.1
7.0
8.2
90/04/03
1055
WATER
0.327999
14.0
6.7
.260
90/07/12
0950
WATER
0.327999
30.0
5.7
.020
90/10/03
1110
WATER
0.327999
22.0
6.8
.050
91/01/14
1005
WATER
0.327999
8.0
6.8
.310
91/04/11
1035
WATER
0.327999
19.0
7.5
THAT'S ALL FOLKS
STORET
RETRIEVAL DATE 91/07/23