NC0020559_Wasteload Allocation_19940819

NPDES DOCUMENT :SCANNING COVER SHEET
NC0020559
Henderson WWTP
NPDES Permit:
Document Type:
Permit Issuance
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Complete File - Historical
Plan of Action
Instream Assessment (67b)
Environmental Assessment (EA)
Permit
History
Document Date:
August 19, 1994
This document is printed on reuse paper - ignore any
content on the reverse side

North Carolina Division of Environmental Management
Water Quality Section / Rapid Assessment Group
August 19, 1994
MEMORANDUM
To: Greg Nizich
From: Farrell Keoughn J /
Through: Carla Sanderson(
Subject: Henderson - Nutbush Creek WWTP NC0020559
Response to Questions on Permit Requirements
Vance County
Two wasteload allocations were completed for this facility in May, 1994; one for a 4.14 mgd discharge
and the second for a 6.0 mgd discharge. A letter from this facility questioning some of the requirements
was received by Permits and Engineering and forwarded to the Technical Support Branch for our
response. The following represents our response:
Item #1: a residual chlorine daily maximum limit of 17.0 µg/I was required for the 6.0 mgd
discharge. Henderson requested clarification as to why this limit was required for the expanded flow
of 6.0 mgd and not for the current discharge of 4.14 mgd. In revising its water quality standards in
1989, North Carolina developed an action level for chlorine of 17.0 µg/I (freshwater classes). Under
current DEM procedure, dechlorination and chlorine limits are now recommended for all new or
expanding dischargers proposing the use of chlorine for effluent disinfection. During the previous
Permit period, letters were sent to all NPDES permit holders using chlorine as a disinfectant which
explained this new procedure and requirements. The requirement for limits on chlorine applies to
new or expanding discharges and in some cases to existing dischargers when problems with toxicity
is correlated to excessive residual chlorine levels, but in most cases existing dischargers are required
to monitor residual chlorine.
Item #2: the proposed upgrade for the Nutbush Creek plant includes the use of UV
disinfection with chlorine to be used "during any emergency failure of the UV system." The letter
from Henderson requests that the residual chlorine limit be deleted from the Permit as a means of
saving the City from "the additional cost and hazard of installing a sulfur dioxide system" for
dechlorination of the effluent. The Technical Support Branch does not support this request. Under
7Q10 conditions, the Permitted discharge(s) constitute approximately 97% and 98% (respectfully) of
the stream flow in Nutbush Creek. Due to the acute effects of chlorine, even short periods of
discharge would not protect water quality.
Item #3: effective April 1, 1994, the total phosphorus limits for this facility were 1.0 mg/I
during the summer period and 1.5 mg/I during the winter period of the NPDES Permit. These limits
were developed per an agreement between DEM and the City of Henderson. Unfortunately, I did
not catch this change in the winter limit when reviewing this wasteload. The Technical Support
Branch concurs with this request and the Permit should be altered.
Item #4: the quarterly sampling for these two total phosphorus limits should still follow the
procedure outlined by T15A: 02B .0503 (20).

Henderson - Nutbush Creek WWTP
NC0066150 Vance County
Item #8: Iron was found to be in the effluent of this discharge in amounts which exceed
the allowable State Water Quality Action Level. Current SOP requires monitoring through the
NPDES Permit for those parameters which exceed the allowable Action Levels.
Item #9: the Technical Support Branch does not usually respond to weekly average
requests for ammonia since we have no acute standard established. We will concur with the Permits
and Engineering assessment.
u AI ov uer 5
LF.a0
33 •S
CR is WAITP
�n+LY f1hx Km/v.0 J
(5x Z.•t') -7_.1 . E.
L5xz6= 104
(sx z-o)-z•o = •o
(5,c ZZl,= 109
wkt�kz...
Z.`
0
26 0
Daily
Maximum
Cadmium (µg/I); 5
Lead (41): 33.8
Item #5: a daily maximum and weekly average are requested for cadmium and lead. The
following represent the Technical Supports recommendations:
4.14 mgd
Weekly
Average
2.1
26.0
6.0 mgd
Daily
Maximum
5
33.8
Weekly
Average
2.0
26.0
The monitoring requirements for these parameters are outlined in T15A: 02B .0202 (5) (a) (b)
Item #6: a State Water Quality standard for fluoride of 1.8 mg/I is the basis for this
requirement. The limit should have been stated in mg/I rather than µg/1; i.e. for the 4.14 mgd
discharge the fluoride limit should be 1.86 mg/I and for the 6.0 mgd discharge the limit should read
1.84 mg/I.
Item #7: the State Water Quality standard for mercury is 0.012 µg/I and the lack of dilution
at this discharge point requires limits at the standard for both 4.14 and 6.0 mgd. We recognize that
detection down to these levels is not possible. The State Lab detection level for mercury is currently
0.2 µg/I. Therefore, this facility should report less than 0.2 4/1 for all mercury samples below this
detection level. �UYLlehh 11)06+ �e �kt9rt�eJE�
1cs)
cc: Central Files

DIVISION OF ENVIRONMENTAL MANAGEMENT
MEMORANDUM
To:
From:
Subject:
July 29, 1994
Farrell Keough
Instream Assessment Unit
Greg Nizich 6
Permits and Engineering
Draft Permit Comments
Permit # NC0020559
Henderson Nutbush Creek WWTP
Vance County
Please comment on the attached letter from the City of Henderson on the recent draft
permit. According to Thomas Spain, the previously issued permit (in 1988) has been
amended 4 times. They are also under a JOC which has been amended twice. The latest
revisions may not have been incorporated for all parameters and that has probably
generated several of the comments.
Attachment
cc: Danny Smith, RRO

I7/28/1994 15:21
919-492-3324
CI
PAGE 01
CITY OF HENDERSON
NORTH CAROLINA
NUTBUSH WASTEWATER TREATMENT PLANT
FAX NO 1 919 492-3324
DATE: _ 17: si- $ "' 9
4/4.
Number of Sheets Transmitted
(including transmittal sheet)
If you do not receive the correct number of sheets transmitted
have any question, please call me at 919 492-6167.
Comments
�}e.Az n.‘ R. %V, O/C-4
Aelt FAX; el Mil eor m
2-AL. ad7y //edvekedropiv clie./40 Mdeerv7
4/, 0 72/". we 45: r 5 3
P4444-77trieles-
P. O. Box 1434, Henderson, North Carolina 27536
or
L.rri
, Z
1

•• 37/2811994 15:21 919-492-3324
CITY0FFENDiMTP PAGE 02
}I 11FNiI '
:(1841):
July 28, 1994
CITY OW URN I)E RSON
?H)Writ (Mimi AIN A
Mr. David Goodrich
NPDES Permits Group
DEHNR-DEM
P. 0. Box '29535
Raleigh, NC 27626-0535
RE: City of Henderson Nutbush Creek WWTP
NPDES #NC002O559
Comments on draft permit dated June 16, 1994
••rrr•7: or
r•il•••t(e VTf1.TTIRi4 1.P,1•T.
Dear Mr. Goodrich,
I recently received a draft copy of a NPDES permit for the City of
Henderson's Nutbush Creek WWTP.
I contacted Judy Garrett of the Raleigh Regional Office to discuss
certain items in the permit since she and I have worked together
extensively on previous permits for the Henderson Facility.
As a result of my review of the draft permit, I offer several
requests and comments as listed below.
1. No residual chlorine limit (17 Mg/L) is specified at a plant
discharge of 4.14 MGD, but it is listed at 6.0 MGD. Why was
the residual not specified at 4.14 MGD?
2. The new plant construction provides for UV disinfection of the
effluent with the old chlorination system serving as an
alternate means of disinfection if the UV system breaks down.
I re est that the City of Henderson be allowed to use tha old
chlo ination system during any emergency failure of the UV
cyst m and that the City be exempted from having to meet the
17 /1 chlorine limit during periods of emergency chlorine
use. This would save the City the additional cost and hazard
of installing a sulfer dioxide system.
If you agree that this is reasonable, please add wording in
the permit to allow this to be done.
3. Our rpresent permit at 4.14 MOD originally had phosphorus
limits of 0.5 mg/1 summer and 2.0 mg/1 winter.
The DEM agreed and modified these limits to 1.0 mg/1 summer
9 S 70 of'
stac.olm ow
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NPR

' 07/ 29/1994 15: 21
919-492-3324
CITYO PAGE 03
and 1.5 mg/1 winter since hydraulic studies indicated that it
took over three years for the plant effluent to displace the
volume of the Nutbush Arm of Kerr Lake.
I request that the phosphorus limit for winter at 4.14 MGD be CONccrL
increased to 1.5 mg/1 or an explanation be provided if this is inue,1}1
not acceptable.EAstz
ecc�
4. How will the quarterly average for total phosphorus be
computed for compliance and how will the summer and winter
quarterly averagesbe determined if different limits apply,
such as a 1.0 mg/1 summer and 1.5 mg/1 winter limit?
5. The treatment plant will not be able to consistently meet
daily maximum limits of 2.1Ag/1 for cadmium and 2614g/1 for
lead. '
I request that the monitoring frequency for these two metals
be increased to daily with daily maximum and weekly average
limits.
I request that the daily monitoring requirement allow for
exemption of monitoring after sufficient consecutive day
samples per week indicate compliance with the permit limits.
6. What is the purpose of adding fluoride to the permit and what
are the criteria for establishing a limit of 1,639.0 14g/1?
7. The permit limit for mercury of .012 j4g/1 at 6.0 MGD is above
our contract laboratory equipment detection level of 200 /l.
What is the ur se of setting a limit this low and how should
results below detection level be reported and computed to
determine compliance?
S. Why was iron added to the permit for monitoring?
9• Weekly average limits for ammonia nitrogen were left off the
permit. Is this no longer a requirement?
Thank you for your consideration of these items. If you need to
discuss any of them further, I can be reached at the address or
phone number listed below.
City of Henderson
P. O. Box 1434
Henderson, NC 27536
919 492-6167
cc: Eric Williams, City Manager
Frank Frazier, City Engineer
Mary Antoni, Chemist
Judy Garrett, DEM Reg. Off.
Sincerely,
Thomas M. S4412#4.:.61.1
pain
Director WWTP
City of Henderson
rn•
F LdOs'_ME.
I EGA)

Zizu,, cweb
NPDES WASTE LOAD ALLOCATION
PERMIT NO.: NC0020559
PERMI"1.1EE NAME: City of Henderson
FACILITY NAME: Nutbush Creek WWTP
Facility Status: Existing
Permit Status: Renewal
Major
Pipe No.: 001
Minor
Design Capacity: 4.14 MGD
Domestic (% of Flow): 94.5 %
Industrial (% of Flow): 5.5 %
Comments:
Renewal application attached. Flow at 6.0 MGD also.
RECEIVING STREAM: Nutbush Creek
Class: C
Sub -Basin: 03-02-06
Reference USGS Quad: B 25 SW
County: Vance
Regional Office: Raleigh Regional Office
(please attach)
Previous Exp. Date: 8/31/94 Treatment Plant Class:
Classification changes within three miles:
Requested by:
Prepared by:
Reviewed by:
�� z3 • '-15
GregNizich L 5 A)
Class IV
Date: 3/2/94
Date: S / z,5 J c)4
Date: 5- -7 7 9
Modeler
Date Rec.
311-1I614
Drainage Area: 3.8 mi2 Average Streamflow: 3.5 cfs
s7Q10: 0.2 cfs w7Q10: 0.4 cfs 30Q2: 0.5 cfs
Type of Toxicity Test:
Monitoring Schedule:
Chronic (Ceriodaphnia) P / F Test : 90%
March, June, September, and December
Instream Monitoring: refer Fact Sheet attatchment
Summer
Monthly Ave
Wasteflow (MGD): 4.14
BOD5 (mg/I): 6.0 9.0
NH3N (mg/1): 3.0
DO (mg/1): 6.0 Daily Ave
Total Suspended Residue (mg/I): 30 45
Fecal Col. (/100 ml): 200 400
pH (SU): 6 - 9 Daily Ave
Residual Chlorine * (µg/1): monitor
Oil & Grease (mg/1): nr
TP (mg/1): 1.0 Quarterly Ave
TN (mg/1): monitor
* If chlorine is used as a disinfection agent
Cadmium (14/1):
Copper (µ.g/1):
Nickel (µg/1):
Lead (µgn):
Zinc (14/1):
Cyanide (µg/1):
Mercury (14/1):
Silver (14/1):
MBAS (14/1):
Fluoride (µg/1):
Iron (mg/1):
Weekly Ave
4.5
Daily Max.
2.1
monitor
nr
26.0
monitor
nr
0.012
monitor
516
1,856
monitor
Winter
Monthly Ave
4.14
12.0 18.0
6.0 9.0
6.0 Daily Ave
30 45
200 400
6 - 9 Daily Ave
monitor
Ilr 3 ardvrs
I•5
1.0 Quarterly Ave
monitor
Weekly Ave
t9csti

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 ALLOCATION
Request # 7771
City of Henderson - Nutbush Creek WWTP
NC0020559
Domestic - 94.5 % Industrial - 5.5 %
Existing
Renewal
Nutbush Creek
C
03-02-06
Vance Stream Characteristic:
Raleigh USGS #
Nizich Date:
3/4/94
B25SW
Drainage Area (mi2):
Summer 7Q10 (cfs):
Winter 7Q10 (cfs):
Average Flow (cfs):
30Q2 (cfs):
IWC (%):
Wasteload Allocation Summary
(approach taken, correspondence/with region, EPA, etc.)
Facility under>SOC
Instream data, especially of nutrients, under review for Basin Study
Special Schedule Requirements and additional comments from,Reviewer :
02.0792.6210
1988
3.8
0.2
0.4
3.5
0.5
97 %
Recommended by:
Farrell Keough
Reviewed by
Instream Assessment:
Date: za 41 rot, L , 19 V !
Regional Supervisor: 9-._ Date: 51/404
Permits & Engineering: ,,� yu(i /h .(i Date: 572-'f(clz f
RETURN TO TECHNICAL SERVICES BY: MAY ` ,l 1994
Jai
APR 261994
DEHNR-RAC. RO

Existing Limits:
Wasteflow (MGD):
BOD5 (mg/1):
NH3N (mg/1):
DO (mg/1):
Total Suspended Residue (mg/I):
Fecal Col. (/100 rinl):
pH (SU):
Residual Chlorine WA):
Oil & Grease (mg/1):
TP (mg/1):
TN (mg/1):
Recommended Limits:
Wasteflow (MGD):
BOD5 (mg/I):
NH3N (mg/1):
DO (mg/1):
Total Suspended Residue (mg/1):
Fecal Col. (/100 ml):
pH (SU):
4Residual Chlorine, (1.4/1):
Oil & Grease (mg/1):
TP (mg/1):
TN (mg/1):
Limits Changes Due To:
Parameter(s) Affected
CONVENTIONAL PARAMETERS
Summer Winter
Monthly Ave Weekly Ave Monthly Ave Weekly Ave
4.14 4.14
6.0 9.0
3.0 4.5
6.0 Daily Ave
30 45
200 400
6 - 9 Daily Ave
monitor
nr
1.0 Quarterly Ave
monitor
Summer
Monthly Ave Weekly Ave
4.14
6.0 9.0
3.0 4.5
6.0 Daily Ave
30 45
200 400
6 - 9 Daily Ave
monitor
nr
1.0 Quarterly Ave
monitor
12.0 18.0
6.0 9.0
6.0 Daily Ave
30 45
200 400
6 - 9 Daily Ave
monitor
nr 6 v4
,k0 Quarterly Ave
monitor
t.S
Winter
Monthly Ave Weekly Ave WQ or EL
4.14
12.0 18.0 vvc1
6.0 9.0 WQ
6.0 Daily Ave WQ
30 45
200 400
6 - 9 Daily Ave
monitor
nr
1.0 Quarterly Ave
monitor
5 C
WQ
4-e re
5 5('G
(explanation of any modifications to past modeling analysis including new flows, rates, field data,
interacting discharges)
(See page 4 for miscellaneous and special conditions, if applicable)

Type of Toxicity Test:
Existing Limit:
Recommended Limit:
Monitoring Schedule:
Existing Limits
Cadmium (µg/1):
Chromium (µg/1):
Copper (µg/1):
Nickel (µg/1):
Lead (µme):
Zinc (µg/1):
Cyanide (14/1):
Mercury (µg/1):
Silver (µg/1):
MBAS (µg/1):
Fluoride (11g/1):
Chloride (µg/1):
Diazinon (µg/1):
Recommends, Limits
Cadmium (µg/1):
Chromium (µg/1):
Copper (µg/1):
Nickel (µg/1):
Lead (µ0):
Zinc (14/1):
Cyanide (µg/1):
Mercury (µg/1):
Silver (14/1):
MBAS (14/1):
Fluoride (µg/1):
-Chloride (µg/1):
,Diazinon (µg/1):
Refer attached for limits c
TOXICS/METALS
Chronic (Ceriodaphnia) P / F Toxicity Test
90%
90 %
March, June, September, and December
Daily Max.
2.1
52.0
monitor
91.0
26.0
monitor
monitor
nr
monitor
monitor
nr
nr
nr
Daily Max. WQ or EL
2.1 WQ
nr
monitor
9- IN{
26.0
monitor
5.2 rotz_
0.012
monitor
516
1,856
nr
anges rational
19/e/D
'Vv
_x_ Parameter(s) are water quality limited. For some parameters, the available load capacity of
the immediate receiving water will be consumed. This may affect future water quality based
effluent limitations for additional dischargers within this portion of the watershed.
OR
WQ
WQ
WQ
WQ
WQ
WQ
No parameters are water quality limited, but this discharge may affect future allocations.

Arsenic:
Cadmium:
Chromium:
Copper [AL]:
Cyanide:
Lead:
Mercury:
Nickel:
Silver [AL]:
Zinc:
MBAS:
Molybdenum:
iron [AL]:
Diazinon:
Chloride [AL]:
Fluoride:
LTMP *previous limits displayed as 4.14 mgd / 6.0 mgd
x monitoring was not required - will receive data from LTMP for next review
previous NPDES Permit limits of 2.1 NA I 2.0 µg/I
continued recommendation of NPDES Permit limit
x previous NPDES Permit limits of 52.0 NA / 51.0 µg/l
drop NPDES Permit requirement - data will be obtained from LTMP
x previous NPDES Permit requirements of monitor / monitor
per current SOP, monthly NPDES monitoring recommended
previous NPDES Permit requirements of monitor / 5.1 NA
- ; - - 41 data pointta BVt.
-.
previous NPDES Permit limit of 26.0 µg/l [both flows]
continued recommendation of NPDES Permit limit
previous NPDES Permit requirements of not required / 0.012 µg/I
continued recommendation of NPDES Permit limit
x previous NPDES Permit limit of 91.0 pg/l / 90.0 µg/l
drop NPDES Permit requirement - data will be obtained from LTMP
x previous NPDES Permit requirements of monitor / monitor
per current SOP, monthly NPDES monitoring recommended
z previous NPDES Permit requirements of monitor / monitor
per current SOP, monthly NPDES monitoring recommended
previous NPDES Permit requirements of monitor / 511.0 NA
continued recommendation of NPDES Permit limit
monitoring was not required - will receive data from LTMP for next review
no previous NPDES Permit requirement
per current SOP, monthly NPDES monitoring recommended
previous NPDES Permit requirements of not required / monitor
drop NPDES Permit requirement
previous NPDES Permit requirements of not required / monitor
drop NPDES Permit requirement
previous NPDES Permit requirements of monitor / 1,839.0 µg/l
continued recommendation of NPDES Permit limit

INSTREAM MONITORING REQUIREMENTS
Upstream Location: refer attached
Downstream Location: refer attached
Parameters: I refer attached
Special instream monitoring locations or monitoring frequencies:
MISCELLANEOUS INFORMATION & SPECIAL CONDITIONS
Adequacy of Existing Treatment
Has the facility de nstrated the ability to meet the proposed new limits with existingtreatment
facilities? Yes No y, or 4-5
Ware: c1cC;S At re 6
If no, which parameters cannot be met?
Would a "phasing in" of the new limits be appropriate? Yes No X
If yes, please provide a schedule (and basis for that schedule) with the regional
office recommendations:
If no, why not?
Cevin,/t67 1/3 dOCL
,fio
Special Instructions or Conditions
Wasteload sent to EPA? (Major) (Y or N)
(If yes, then attach updated evaluation of facility, including toxics spreadsheet, modeling
analysisif modeled at renewal, and description of how it fits into basinwide plan)
Additional Information attached? f (Y or N) If yes, explain with attachments.ilO
i I n Ghat ntfitirrOYi t If4);14 114Pn/6

Facility Name Henderson - Nutbush WWTP Permit # NC0020559 Pipe # 001
CHRONIC TOXICITY PASS/FAIL PERMIT LIMIT (QRTRLY)
The effluent discharge shall at no time exhibit chronic toxicity using test procedures outlined in:
1.) The North COarolina 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 90 °b (defined as treatment two in the North Carolina procedure document). The permit
holder shall perform quarterly monitoring using this procedure to establish compliance with the permit
condition. The first test will be performed after thirty days from the effective date of this permit during the
months of Mar., Jun., Sept., and Dec. 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
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 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 noncom fiance with monitoring requirements.
7Q10
Permitted Flow
IWC
Basin & Sub -basin
Receiving Stream
County
0.2 cfs
6.0 MGD
97 %
03-02-06
Nutbush Creek
Vance
QCL P/F Version 9/91
Recommended by,
Farrell Keou
Date zaRpw1.., iscut
d

Instream Monitoring Requirements:
Henderson - Nutbush Creek WWTP NC0020559
Sample Locations:,
U: NC39
D1: at power lines
D2: immediately above the confluence of Indian and Crooked Creeks
Summer (April - October)
Parameter
Dissolved Oxygen
pH
Temperature
Fecal Coliform
Conductivity
Secchi Depth
Chlorophyll - a
Total Phosphorus
NH3 - N
TKN
NO2 - NO3
Winter (November - March)
Parameter
Dissolved Oxygen
pH
Temperature
Fecal Coliform
Conductivity
Frequency / Type Location
weekly / grab U, D1, D2
monthly / profile D1, D2
weekly / grab
monthly / profile
weekly / grab
monthly / profile
weekly / grab
weekly / grab
monthly / composite
monthly / composite
monthly / composite
monthly / composite
monthly / composite
monthly / composite
U, D1, D2
D1, D2
U, D1, D2
D1, D2
U, D1, D2
U, D1, D2
D1, D2
D1, D2
D1, D2
D1, D2
D1, D2
D1, D2
Frequency / Type Location
weekly / grab U, D1, D2
weekly / grab U, D1, D2
weekly / grab U, D1, D2
weekly / grab U, D1, D2
weekly / grab U, D1, D2
• Profiles should be taken at 1 meter intervals
• Composites should be taken with a lab line in the photic zone, (i.e. two times the secchi depth)
• Samples should be taken mid - morning. Rainfall data shall be reported for the seven consecutive
days prior to the day of sampling.

Facility Mans a
MPDES#=
Qw (MGD)
7D10a
Henderson - Nutbushh WWTP
NC0020559
4.14 mgd
0.20 cfs
96.98 %
FINAL RESULTS
Arsenic Maximum Value
Max. Pred Cw
Allowable Cw
Cadmium Maximum Value
Max. Prod Cw
Allowable Cw
Chromium Maximum Value
Max. Pred Cw
Allowable Cw
Copper [Al] Maximum Value
Max. Pred Cw
Allowable Cw
Cyanide Maximum Value
Max. Pred Cw
Allowable Cw
Lead Maximum Value
Max. Pred Cw
Allowable Cw
Mercury Maximum Value
Max. Pred Cw
Allowable Cw
Nickel
Max. Pred Cw
Allowable Cw
Silver [AL]
Max. Prod Cw
Allowable Cw
Zinc [AL]
Max. Pred Cw
Allowable Cw
MBAS
Max. Pred Cw
Allowable Cw
Molybdenum
Max. Pred Cw
Allowable Cw
Iron [AL]
Max. Prod Cw
Allowable Cw
Diazinon [c.]
Max. Prod Cw
Allowable Cw
Maximum Value
Maximum Value
Maximum Value
Maximum Value
Maximum Value
Maximum Value
0.0
0.0
51.6
10.0 A
18.0 ptir2.1
20.0
30.0 ,\,�1
51.6 `/
973.0
2432.5 'V•
7.2
5.0
5.5
5.2
934.0
2615.2
25.8
1.0
2.00
0.01
1750.0
3500.0
51.6
0.7
0.9
0.5
0.0
0.0
103.1
14951.0
41 .$
f�1
Maximum Value 0.5
1.3
8571.4
Chloride [AL] Maximum Value
Max. Pred Cw
Allowable Cw
Fluoride Maximum Value
Max. Pred Cw
Allowable Cw
64.2
128.4
237.2
4.8
16.3
Atr
i.86
•
411719,4

lkaeofaraon_ MMus.* WHIP
ACOO10550
4.14 mad
0.20 c1a
FI(AL RESULTS
ksada linkman Van 6A
Max. Prod Car Oa
AbwahN ON 11.11 412.
i
i
1
I
Cadmium tlalra•. Va ra 14a i Cadmium
Mac Prod Or 1-A Lchf1T 1
Abwada Ow L1 i
Chromium Mao mint Valve 36O i
Max. Prod Cw WO i
Naval* Ow 1/A LT PIP i
Copper [ly Nubian Vats 072.0 1
Max. Prod Cw 3432.6 At POe'5 I
NaganoOr 7.2 p10aN,�1•�' i
*Ankle wt e alaiwVak s L N11'd�'L, 1
ltaz Pad Or U 1
Ab.ahlaOr fA U{r(+t1T 1
I i
i
'DlIT i
i
i
Land YalNa. Vales
Ma. Prod Cw
Mouth Ow
Max.thrum, Nashua Wu.
PadCw
Abaatla Or
tidal laesanum Vaara
Max. Pad cw
Abwatl• Or
034.2
NIL!
211.11
i
Moor [Ay M ao=V se all i
Ma. PadCw 114.00 At? 3 1
AbadisCw OAS "'°7 i
Boo [AL] Madmen Varna 17W i
Ma
MProdCw ti00A puts i
AbwahMCw Ni a+oi%)"%t ] i
.., 4/risk
MBAS MadamsVales 03 1
Mac. Prod Cw
Nara* Ow
1.0
100
sal L
11i I
aA Ltn1 P
t a.7
Urn
Molybdosso amazon Vaa. 0.0
Ma. Pro ow 90 N
Aaowa*Ow 102.1 1
Iron [AL] Matlsso Value
Ma. Pad Cw
AlowatarCue
Merinos [c1
Ma. Pad Cu
AbwahloCw
1
14NA i
411a.9 4�PQ1r5 1
103.1 how
� 1
M.dm1 m Yak.
Cliodd0 [AL] Makwsa Vale.
Ma. Prod Cw
Mtwara Cw
Fk7oddo Ilkdoa•. Woo
Ma. ProdCw
Abwabla Ow
0i
1.a 414 .
6171A
Mea1w_ Arsenic
aaaatird_ 50 Na
BOLA120L 1172 DL RESULTS
610 Dar.
Moan
ay.
/ONAN
'D1Va1
106001
Mar. Waa 6.0 Nt
Mat Prod Ca Y pp
Aisu Cw 6/i Na
li aMr_ Cockatoo Molokai
Sindwd_ 2 ,w a.sau- 50 Nl
n B11.111DL '11n DL RESULTS 0 BOL.11OL 11n Ix
I 0.5 • 615Ow. 1a 1 6
2 0.5 • lam 1A 2 6
a 2 C.V. 1A a 10
4 0.5 4 2S
a 0.5 s 7
a S 1kiRas r. 111 4 8
7 4 Ma. Woo 10r0 Na : 7 8
• 0A • aae. Pilaf:. 16a Ns . a 6
• 6 Mamba Cr Ll N1 a 9
to 3 so 25
II 0A 11 11
t2 0.5 tt 25
to 0.5 13 9
14 0.5 14 2.5
1s 0.5 is 23
to 2 Is 8
17 2 17 9
s• 0.5 a 25
14 0.5 111 2S
to 0.5 a 25
:t 0.5 Os 23
a OA a 25
a 0.6 a 25
as 0.5 a 25
a OS . a 2.5
a 10 as 8
✓ 0.5 a 25
a 0.5 a 18
a 0.5 a 25
a 0.5 is 25
is 0.5 at 25
is 0.5 as 25
is 3 as 25
a 1 a 6
a 0.5 a 25
a OA a 25
a 1 a 25
a 0.6 a 6
a 0.6 50 2.5
a 0.6 40 2.6
41 0.5 41 25
a 0.6 a 25
n 0A 4a 26
N OS 44 25
s OA a 25
s OS a 2S
a OS a 25
40 OA a 25
a 03 a 25
a OS ao 25
s1 2 a 2.5
is 2 a 2.5
to OA a 2.5
•1 0.5 a 25
a OS N 6
is OS a 25
is 0.5 is 25
at OA a 25
is OS N 25
a 3 a 25
a OS a1 25
a OA a 25
a OS a 25
a 1 •s 23
is 0.6 is 25
a 0.6 N 2.5
a OA a 2.5
■ 1 N 6
is 03 is 25
7• 2 7o Z5
71 0S 71 25
7s 0A 72 5
7a 0.5 7a 5
74 0.5 74 25
7s 0.6 7a 2.5
71 0.5 72 2.5
77 1 n 20
70 OS 7a 25
is 0.5 n 2.5
IS 0A a 25
a 0A to 25
os OS a 6
a 2 a 25
w 1 oe 2.5
is 0.5 s 17
a 0.6 N 6
a 1 is 23
N I N 25
s 1 N 25
a 2 N 25
a I a 25
as 0.9 a 23
is I a 25
a OS a 6
a 4 as 10
a 3 N 25
a 2 a 25
s 1 N 25
a OS N 25
to 0.5 too 2.5
103 OA 101 25
t07 0.5 102 25
to 2 to 25
MI too 0S
10l 106 05
100 106 05
117 107 1
1. 106 1
1s IN
- 110 110
RESULTS
Std Due.
Wan
C.V.
3.2
as
06
Maf Fm. 1.9
Mac. Vakw 39A Na
MisMsd a gala pat
Mask • Cs VIA Nt

January. 1M - Jwury 12
Po mes- Copper [Al]
Sindrd. 7 p04
P.NaWa ry. eelld■
64e414e41. 5 pon
1OL.4213L Ursa RESULTS n B04..1710L 11R01 RESULTS
1 15 Sad Dw. 135.6 1 2.5 no Deo. 02
2 16 Wan 44.8 2 2.5 • Men 2.5
3 15 C.V. 3D a 2.5 • C.V. 0.1
a 16 4 2.5 '
s 18 6 2.5 '
I 15 Mut F40or 4 2.5 a 2.5 MD Fa7or. 1.1
7 960 Mob. V.W. 171.0 p.4 : 7 2.5 • Valuea. VaSD pot
24 Mot. Red Cr 2422.5 p.6 : 3 2.5 • Was Rod Cw SJ p9.4
a 31 A■2wadaa 72 pot; I 2.5 • Aeowatle Cw 5.2 on
le 13 le 2.5
t1 15 11
l2 12 12 55
13 24 13 - 275'' '
14 14 14 2.5
75 50 16 2.5 '
a 12 II 2S
7 16 17 2.5
v 5 15 2.5 '
n 073 is 2.5 '
a 10 a 2.5 '
21 5 21 2.5 '
22 12 22 2.5
n 11 23 2.5 '
24 11 24 2.5 '
a6 14 26 2.5 '
25 17 a 2.5 '
27 13 n 2.5
a 32 2a 2.5 '
a 16 a 2.5 '
3e 13 30 2.5 •
a, 20 31 2.5 '
32 33 32 2.5
33 431 33 2.5 '
34 5 34 2.5 '
35 23 as 2.5 •
34 12 34 2.5
37 48 37 2.5 •
as 31 a 2.5 '
a 29 a 2.6 •
40 12 40 2.5
41 15 41 2.5
42 12 42 2.6 '
43 70 43 2.5 •
a4 23 44 2.5 '
45 10 46 2.6 '
4e 11 45 2.5 •
47 I8 47 2.6
42 28 4e 2.6 •
4e 20 49 2.5 •
s0 5 s0 2.5 '
5, 6 51 2.5 '
52 39 62 2.5 •
53 18 53 2.5 •
so 20 54 2.5 •
65 27 ss 2.5 •
N 5 Si 2.5 '
67 6 6r 2.6 •
N 13 Si 2.5
61 26 N 2.5 •
N 15 N 2.5 '
a 16 n 2.6 •
O 2 37 02 25 '
ea 5 53 2.6
04 6 54 2.5 '
06 29 e5 2.5 •
N 5 N 2.5 '
.7 13 n 2.5 '
N 16 N 2.5
N 13 N 2.5 '
70 13 70 2.5
71 18 71 2.5 •
n 60 n 2.6 '
n 31 73 2.6
74 19 74 2.6
75 70 75 2.5
74 36 7e
n 41 n
n 28 n
n 29 n
N 125 N
11 18 n
a 33 12
ea 125 N
■4 125 N
N 125 N
N 12.5 N
R 12.5 07
N 125 N
N 12.5 N
N 41 N
a, 119 at
92 28 is
13 12.5 53
N 125 N
N 70 N
N 125 N
97 125 57
N 125 N
N 30 N
1m 25 1m
1m 30 lm
102 25 +02
1m 125 tm
,04 25 1114
153 25 ,N
tN 25 tN
1W 25 107
1011 242 ON
tN - tN
110 110
Prang* . Land
6,r,brd. 25 p•1
• Ba-1720L 11/201. RESULTS
t 14 Sad Der. 111.1
2 1.5 • Men 26.6
a 10 O.Y. 42
• 9
6 1.5
■ 41 MDR Flaw- 2J
7 646 Mai wan N4D pot
■ 1.5 %W. Pled Co 26162 p54
■ 11 A■5wa54 a 23.11 p.1
5 6
1.5
12 5
13 36
14 1.5
15 1.5
1. 1.5
17 6
u 1.5
u 10
a 1.5
21 1.5
22 1.6
23 1.5
24 1.5
25 34
25 1.5
n 3
2■ 4
a 1.5
36 4
m 12
32 1.5
a 934
a 4
33 5
a 5
n 1.5
a e
a 8
40 1.5
41 4
42 B
43 1.5
44 4
45 4
4. 26
47 1.5
45 1.6
49 1.5
e0 1.5
61 3
52 9
53 25
6• 25
65 25
N 25
S7 2.5
N 25
N 25
N 12
41 25
e2 25
ea 25
w 73
e5 25
N 25
n 2.5
N 25
N 13
70 17
71 6
72 28
73 25
74 6
75 189
7• 6
n 3.325
n 25
79 25
N 25
11 25
N 5
as 25
M 14
N 9
N 11
n 6
N 17
N 9
N 6
51 361
92 6
N 6
M 10
N 25
N 25
n 25
N 8
N IB
m 10
let 8
too 47
tm 6
lot 6
ISO
109
1W
101
101
110
Parcel-W. Mercury
81.141rd- 0.012 on
• 6134..1R01 11720E RESULTS
0.3 Sad Inv. 0.2
2 0.3 Men 05
3 0.1 C.V. 0.6
4 0.1
6 0.15
• 0.16 • Vld Frlor- 20
7 0.6 Max Vona 1D p44
• 0.3 Max. PM Cr 2.00 on
• OS A67242112 a 0D1 NA
to 0.5
,1 1
12 0.5
13 1
14 0.5
16 0.5
M 0.5
17 0S
15 0.5
u 0.5
a 0$
21 OS
22
22
24
2s
a
a
a
a
30
31
32
33
3,
s
a
A
a
•
40
41
a2
43
44
46
4.
V1nM

Annum 111 - Jvarry 7Q
7lrw2412,. RiCUN
sars.s- 66 p+
2
4
7
•
•
10
11
12
13
14
15
IS
17
IS
IS 11
■ 6
21 11
a 2.5
a 2.6
as 5
a 2.5
N 6
✓ 2.6
N
s
a
a1
a12
a
x
of
a
s
N
N
40
41
42
a
44
a
a
a 1
a
a
O
a 1
11
a 6
N 6
■ 6
■ 6
✓ 6
■ 5
a 5
N 5
N 6
a 6
O 12
N 11
as 5
a S
✓ 6
• S
w 5
m 5
71 5
72 5
7a 5
74 5
7s 5
70 5
at 6
7e 11
7e 5
a 6
a 5
a 11
o S
N 6
■ 5
■ 5
O 5
w 6
w 10
O 17
a 10
■ 5
a 5
N 5
■ 5
■ 6
✓ 5
w 6
a 10
100 5
131 6
to 6
tN 5
104 6
105 5
1■ 6
1v 5
1N 5
IN
110
60L.11'201. 7112 DI. MOULTS
5 81d Dew. L7
5 Moan s.0
2.5 C.Y. 03
2.5
6
6 Atli Roar., 13
2.5 Matt. Valve 182 pas
7 Ma Prod Cs 234 pn
10 Plana* Cr e0.7 pi
2.5
Is
6
11
6
6
8
6
6
rrs.rly- surer IW
arras 0.06 peg
n 00L.1128. 111r201. ROWS
1 4 Old Da. L1
2 0.5 • Man 2.3
3 0.5 • C.V. Le
4 0.5 •
s 05 •
e 0.5 1hf Faaor• LC
7 0.5 Mat Valve 380 poi
O 0.5 • Vac Prod Cr 1140 pe
• 0.5 • A04 I Cs 0.1 pe
10 4
11 2
12 0.5
13 0.5
14 1
15 1
1• 6
17 2
is 2
is 1
so 1
21 0.5
at 0.5
a 0.5
x 0.5
a 0.6
a 0.6
2a 1
a 1
a 0.5
m 0.5
31 0.5
a2 0.5
a 0.5
x 0.5
a 0.5
se 3
37 0.5
ae a
N 36
4o 1
41 2
42 0.6
43 0.5
44 0.5
45 0.5
a 1
47 3
a 0.5
40 0.5
fo 0.5
et 38
a 14
53 0.5
N 0.5
N 1
N 0.5
v 0.5
a 0.5
N 2
s0 4
a 1
a 5
p 0.5
N 1
a 1
N 0.5
v 0.5
a 2
N 1
70 1
71 3
72 0.5
73 0.5
74 0.5
75 0.5
a 2
ar
70
7e
N
to
e2
to
N
a
N
a
N
M
N
et
e2
ei
N
N
N
e7
N
N
100
101
122
10
1N
10e
103
161
101
104
/l0
I
Prerea. 2l+a MJ
01w.144. 60 eM
n 80L.17101. Vaal 0L RESULTS
t 213 81dDw. 222.s
2 153 Man 2112
• 192 C.V. 1.1
• 115
f 134
• 119 MutFador. 20
7 590 Max. Vas, 17ee0 p1
e 221 l ax. Prod Co 3500.0 p4
e 1750 Afeeatle Cs 112 p4
to 245
11 142
12 187
1$ 127
14 274
is 360
if 78
to 250
to 214
1e 254
m 156
21 72
a 132
a 262
24 137
a 141
m 154
>7 343
a 143
a 148
so 161
31 209
32 162
sa 232
x 159
N 141
N 216
37 61
so 129
N 225
4o 168
41 66
ss 232
43 144
44 111
4• 147
a 59
a 117
a 205
a 138
so 120
a 107
42 158
a 145
54 109
N 73
a 135
f 7 240
a 251
■ 53
N 194
11 409
B 256
N 203
N 452
N 155
N 323
a 111
■ 993
M 125
7• 71
71 132
72 100
7a 120
74 136
7f 125
7e
77
7•
7•
N
at
a
ei
N
a
■
a
N
N
N
n
a
a
N
N
N
sr
a
N
to
101
tw
to
101
1N
1N
1v
1N
1■
110
Aar.rr. ■8AS
aarsi. 0.5 -
o 80L.1r10L 7112 DL RESULTS
+ 0.23 64d Dw. 0.1
2 0.18 Moan 02
a 0.16 Ca. L5
• 0.16
s 031
• 0.27 M1I Flaw- 13
7 0.19 Ma. MN 0.7 vet
• 0.06 • Max. Prod al 02 pt
• 0.12 Abeniee Cs L 5 pt
to 021
it 0.14
12 021
13 0.1
14 0.06
13 0.16
1• 021
to 0.16
u 0.13
is 0.16
N 0.14
2t 0.14
a 0.14
a 0.12
x 0.06
a 0.17
N 0.16
a 027
a 0.19
a 0.18
so 0.12
31 0.14
a 0.17
as 02
x 02
ss 0.18
a 0.22
✓ 0.16
s 03
a• 0.16
a 0.17
41 021
a 02
43 0.19
44 0.13
a 0.14
a 0.16
a 0.17
a 0.31
a 02
to 0.24
a 0A
■ 0.14
O 0.13
s4 0.17
■ 0.18
N 0.17
✓ 0.17
■ 03
a 03
O 0.24
a 0.16
■ 0.15
a 0.14
N 0.14
a 0.17
N 0.22
✓ 0.1
w 02
w 0.21
70 0.22
>t 0.17
72 0.17
73 0.15
74 02
7s 0.06
7s 0.14
7r 0.15
7e 0.19
71 0.1
N 0.17
a 0.25
■ 0.15
a 0.06
N 0.16
N 02
N 0.13
✓ 0.14
■ 0.06
■ 025
10 02
a 031
e: 0.25
0 0.26
N 0.18
■ 028
N 0.21
a 0.21
■ 031
N 026
too 036
101 0.47
102 0.7
103 0.29
+N 0.13
+o• 0A8
+a 0.06
107 0.42
+N
toe
its
MINN

Jnu4/9.114 • J. v4ry a2
Parr.b. So.nM/AL'I 1 Da
40O
6bPd- J34'/ WWI
Pl mtr 11I62Nron 1.1 C.r.
57M d- 300 W'1 F.d5M b4..P'01
• 801.1120E 112 OL RESULTS 6131.1204 1121x RESILT5
I 346 SW DN. 1736.9 0.06 Sid 04r. 0.2
7 262 Mean 795.7 0.25 Moan 0.3
3 500 C.V. 22 0.05 0.7
596 0.25
5 14951 5 0.25
e 155 AAA FaCiW. 2.8 a 0.5 Mut Fa;34r- 23
7 209 Mx Vase 14851 p7 7 0.5 Max. Vat. 03 me
s 180 Max Pred Cs 418624 w 4 0.06 • V. Prod Co 13 p4
I 415 Abawibie Cr 71 pet • 9 0.05 • Abrablo Co 0571 A Lai
10 1420 to 0.1
11 352 n 0.17
12 582 /v31 v,j: 12 00.17 13 887 (/13
t4 290 14 0.25
1s 370 15 0.25
16 337 1e 0.5
17 339 17 0.5
Is 439 Is 0.5
19 344 19 0.5
20 618 20 0.5
21 561 21
n 341 22
23 228 23
24 925 24
25 1060 n
26 726 2e
77 904 n
26 359 2s
29 448 29
30 950 30
31 513 31
32 577 32
33 256 23
x 194 34
35 649 35
3e 451 as
37 231 37
36 193 3e
39 383 39
40 313 40
41 379 41
42 814 42
43 624 43
464
45 307 45
49 801 46
47 314 47
41 337 41
41 671 49
so 404 s0
51 593 51
52 447 52
63 640 53
54 522 54
55 561 55
54 340 se
57 528 57
5s 185 5s
66 629 59
60 573 s0
61 562 e1
62 602 62
53 1338 03
04 625 94
es 789 as
se 2860 as
@ 532 e7
es 659 as
69 665 00
70 671 70
71 3765 n
72 705 72
n 600 n
74 776 74
76 565 75
71 76
77 77
71 76
79 79
10 00
12 12
I3 t3
w
05 .5
se se
e 7 17
u 02
99 99
90 9a
91 91
92 92
93 93
94 94
95 95
Da 94
97 97
90 94
99 99
104
13. 101
:V 1@
a3 163
104
15 105
:oe 1m
c7 1@
100 1m
I/O 102
no 110
• 754a4.44 Chloride[ALI Prar4W. Humid.
230 r,97 SWdrd- 1.8 POA
PAL-172Di 1112 DI RESULTS 4 601.120E 1 1/2 Ix RESULTS
56 5411D4, 20.0 0.72 S10 D4, 0.0
2 27,4 Morn 36.7 7 0.77 M44n 09
3 39.9 C.V. 03 3 1 C.V. 10
• 5.38 4 0.9
5 53.5 5 0.9
e 51.8 MOPFao0r- 213 6 1 A48Frew- 3A
7 48.1 Mr. V.940 662 pA 7 0.62 Max. Vat99 4.8 pl
1 49.6 Mu. Prod C4 1264 p4 9 0.5 Mat. P79d Cr 16.3 P4'1
9 53.6 Abra49 Cr 2272 1.0 I 02 Abr0M0 C. 1.1 A94
48.7 10 0.75
n 47.1 11 0.71
12 49.6 12 0.6
n 44.5 13 4.8
14 45 14 1
15 39.1 16 0.8
16 64.2 16 0.95
17 59.4 17 0.05
,6 22.2 ,9 0.77
19 2.9 10 0.59
20 15 m 0.76
2.9 n 0.63
n 22
23 73
24 20
25 25
26 26
77 27
26 26
29 2➢
30 30
31 T
32 32
33 33
35 35
36 36
37 9
38 36
39 39
40 40
41
42 42
u a3
u w
45 a5
4a 46
47 47
44 u
49 49
50 50
51 51
52 52
51 54
55 55
5e 51
57 57
511 st
50 50
60 ea
61 el
s3 e3
x 04
65 e5
as @
67 67
68 S
69 eo
70 70
71 71
77 72
n 73
74 74
75 75
78 76
n n
76 76
79 71
60
41
@ @
43 60
M
95
96 93
n n
M 01
M @
90 60
91
92 @
13 W
w w
95 95
26 oa
27
9s 96
02 W
100 LOG
101 101
102 102
103 103
104 104
105 105
10.3 106
107 1@
108 106
109 109
n0 11a
4/17,94

R
,, Facility Name: City of Henderson - Nutbush Creek WWTP
Permit Number: NC0020559
Engineer: Nizich
Subbasin: 03-02-06
Receiving Stream: Nutbush Creek
USGS quad #: B25SW
Request Number: 7771
Date: 3/4/94
Expiration date: 8/31/94
Existing WLA checked:
Staff Report
Topo checked:
USGS Flows confirmed:
PIRF / APAMS:
IWC Spreadsheet:
Stream Classification:
Nutrient Sensitivity:
Instream Data:
x
x
x
nr
x
x
x
x
Brief of WLA Analysis
previous WLA'a
1974: first WLA in files. Limits were 30 mgll BODA,15 mgll BOD5,15 mg/I SS, 3.5 mg/I TKN, and 200 mpn/100 ml fecal coliform. A
note is on this memorandum stating that effluent limitations are in error and corrected values should be determined.
1975: this looks like the updated limits from the 1974 request. BOD5 12 mg/I, TKN 3 mg/I, 30 mg/I TSS, 200 / 100 ml fecal coliform,
6-8.5SUpH, and 5mg/IDO.
1976: new limits for 1.84 - 3.7 mgd were established. I assume these represented summer / winter limits; UOD 46 / 53, BOD5 18/
17, NH3-N 7 / 9, TSS 30, fecal coliform 200 / 100 ml, pH 6 - 8.5, DO 5 / 6. A note is also in the file indicating that an intensive
survey was performed in 1975 -1976 including dye info., depth integrated DO's, and some nutrient data
1983: facility was remodeled for an expansion to 4.14 mgd. Limits were summer / winter: 5 / 8 mg/1 BOD5, 3 / 4 NH-N, 5 mg/I DO,
1,000 / 100 ml Fecal Coiiform, and 6 - 9 SU pH. Request from facility for reallocation, new limits of: 5 / 5 mg/I BOD5, 3 / 12
NH3-N, 6 mg/I DO, 1,000 / 100 ml Fecal Coliform, and 6 - 9 SU pH were recommended.
1986: renewal due to request from facility to relax BOD5 and NH3-N limits by increasing dissolved oxygen requirement: 5 / 10 mg/1
BOD5, 3 / 6 NH3-N, 7 mg/I DO, 30 mg/I TSS, 1,000 / 100 ml Fecal Coliform, and 6 - 9 SU pH were recommended. A
memorandum from Trevor Clement on this reallocation indicates that the newly modeled BOD5 and NH3-N limits will not be
decreased much by the additional dissolved oxygen input; due "to the high carbonaceous deoxygenation rated used in the
model (k1 - 1.5 / ay). This rate was determined back in 1976 when the model was calibrated. At that time, Henderson
possessed only a secondary treatment facility and a pickle factory was discharging upstream of them. The pickle factory no
longer discharges..." However, there may be other influences on D.O. in Nutbush Creek, particularly from algal growth and
respiration, that mire not accounted for in the existing model." Due to offset of these factors, the existing model was put into
use.
1988: a new wasteload analysis was completed which included another BOD5 and NH3-N trade out was completed: 6 / 12 mg/!
BOD5, 3 / 6 NH3-N, 7 mg/I DO. Along with these recommended limits, requirements for Cr, Pb, Cd, and Ni were included.
Also, summer / winter limits of 0.5 / 2 mgll were recommended for Total Phosphorus. A chronic Toxicity Test and depth
integrated downstream monitoring with a nutrient series was recommended.
1988: Intensive Survey did a study on Kerr Lake and the various pertinent arms, (i.e. Nutbush Creek, Crooked Run, etc.). The
summary page of the study, (marked in WLA file) indicated many exceedences of the chlorophyll - a standard accompanied
by periods of zero - flow from the various arms, (tributaries) to the system. Water body coloring as well as secchi depth
measurements indicated impacts from the Henderson WWTP.
1989: a memorandum addressing the two studies, (1988 and another from the 1970's) concluded that "[t]he survey indicated that the
upper reach of the Nutbush Creek arm is hypereutrophic, with atrophic gradient to mesotrophic conditions at the downstream
extent of the sampling. The impact of the WWTP is of concern because of the bloavailability of the effluent nutrients, the lack
of dilution, and long retention time." This report addresses most of the issues dealt with in the 1989 Permitting of this facility
and is therefore necessary reading for any WLA re-evaluation,
[ note Empirical Phosphorus and Chlorophyll a Modeling section in Appendix A].
1991: WLA requested for flows of 4.14 mgd and 6.0 mgd. The 6.0 mgd discharge received ammonia limits of 1 / 1.9 based on
ammonia toxicity., Monitoring for Ag, Zn, Cu, MBAS and CN were required for the 4.14 mgd flow, while additional limits for CN,
Hg, MBAS, Cl- along with Cu, Zn, Ag, and As monitoring were required for the 6.0 mgd flow. The Staff Report indicates that at
that time the City had requested a "modification to the Consent Judgment to include the expansion and upgrade of the WWTP.
The plant has had problems with meeting the BOD and NH3-N limits in the winter when cold temperatures and high flows
reduce treatment efficiency." The toxicity limit was also changed to a monitoring requirement in the JOC.
SOC / JOC file: after talking with Jeff Bouchelle, facility should be in compliance with their effluent limits by August 15, 1994 and their
Toxicity Test requlirements by March 1,1996. Staff Report has complete write up on status of additional equipment.
* note dates on submitted APAM's
* review '92 -'93 instream monitoring data [nutrient series]:
Tiny --> Completed Checklist —> 03-02 Roanoke —> 03-02-06 [pathway on computer]

Arsenic:
Cadmium:
Chromium:
Copper [AL]:
Cyanide:
Lead:
Mercury:
Nickel:
Silver [AL]:
Zinc:
MBAS:
Molybdenum:
iron [AL]:
Diazinon:
Chloride [AL]:
Fluoride:
LTMP
Max. Pred Cw x
Allowable Cw
Max. Prod Cw
Allowable Cw
Max. Pred Cw
Allowable Cw
Max. Pred Cw
Allowable Cw
Max. Prod Cw
Allowable Cw
Max. Prod Cw
Allowable Cw
Max. Pred Cw
Allowable Cw
Max. Pred Cw
Allowable Cw
Max. Prod Cw
Allowable Cw
Max. Pred Cw
Allowable Cw
Max. Prod Cw
Allowable Cw
Max. Pr $d Cw
Allowable Cw
Max. Prod Cw
Allowable Cw
Max. Pred Cw
Allowable Cw
Max. Prod Cw
Allowable Cw
Max. Pred Cw
Allowable Cw
18.0 x
2.1
30 x
51.6
2,432.5 x
7.2
5.5 x
5.2
2,615.2 x
25.8
2.0 x
0.1
23.4 x
90.7
114.0 x
0.06
3,500 x
51.6
0.9 mgn
0.5 mgn
x
41,863
103.1
1.3
8,571.4
128.4 mgn
237.2 mgn
16.3 mgn
1.86 mgn
*previous limits displayed as 4.14 mgd / 6.0 mgd
monitoring was not required - will recieve data from LTMP for next review
previous NPDES Permit limits of 2.1 WI / 2.0 µg/I
continued reccommendation of NPDES Permit limit
previous NPDES Permit limits of 52.0 pg/I / 51.0 pg/I
drop NPDES Permit requirement - data will be obtained from LTMP
previous NPDES Permit requirements of monitor / monitor
per current SOP, monthly NPDES monitoring recommended
previous NPDES Permit requirements of monitor / 5.1 pg/I
continued reccommendation of NPDES Permit limit
previous NPDES Permit limit of 26.0 pg/I [both flows]
continued reccommendation of NPDES Permit limit
previous NPDES Permit requirments of not required / 0.012 pg/I
continued reccommendation of NPDES Permit limit
previous NPDES Permit limit of 91.0 Nil / 90.0 pg/I
drop NPDES Permit requirement - data will be obtained from LIMP
previous NPDES Permit requirements of monitor / monitor
per current SOP, monthly NPDES monitoring recommended
previous NPDES Permit requirements of monitor / monitor
per current SOP, monthly NPDES monitoring recommended
previous NPDES Permit requirements of monitor / 511.0 µg/I
continued reccommendation of NPDES Permit limit
monitoring was not required - will recieve data from LTMP for next review
no previous NPDES Permit requirement
per current SOP, monthly NPDES monitoring recommended
previous NPDES Permit requirments of not required / monitor
drop NPDES Permit requiremenmt
previous NPDES Permit requirments of not required / monitor
drop NPDES Permit requiremenmt
previous NPDES Permit requirements of monitor / 1,839.0 µg/l
continued reccommendation of NPDES Permit limit
* Molybdenum, Selenium, MBAS, and Fe are also in LTMP. MBAS is monitored due to NPDES Permit limit. Pretreatment questions
the need for iron monitoring; current SOP requires at minimum, monthly monitoring for exceedences of Action Levels.
SI U's
Americal Corporation
Purolator Products Company
Ball - Incon Packaging Corporation
Softspun Knitting Mills, Incorporated
The IAMS Company
JP Taylor Tobacco Comany, Incorporated
Effluent Considerations
Hosiery
Air filtration products
Glass containers
Hosiery
Pet Foods
Tobacco
Pretreatment recieved a copy of our recomendations and approved them.

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Henderson - Nutbush Creek Waste Water Treatment Plant NC0020S58
Upstream: Highway 39 North
Month Temp DO Saturation Fecal Conductivity
Jan-94 5 10.9 85% 120 133
Dec-93 7 10.2 84% 533 200
Nov-93 9 10.2 88% 251 186
Oct 93 15 8.5 84% 278 195
Sep-93- - --- 22- --- -6.8-- - 78% -- - - 355 185
Aug-93 25 6.8 82% 51 229
Jul-93 25 6.3 76% 15 253
Jun-93 19 6.6 71% 36
May-93 17 8.1 84% 25 214
Apr-93 13 10.6 101% 12 150
Mar-93 9 9.7 84% 12 150
Feb-93 5 11.4 89% 155 130
Jan-93 11 10.3 93% 7 130
Dec-92 7 10.0 82% 144 166
Nov-92 13 8.3 79% 84 161
Oct 92 12 8.0 74% 348 193
Sep-92 21 6.7 75% 84 206
Aug-92 24 6.3 75% 765 206
Jul-92 23 5.8 68% 525 194
Jun-92 20 6.1 67% 491 218
May-92 16 7.2 73% 1792 136
Apr-92 14 9.2 89% 188 168
Mar-92 10 9.9 88% 136 131
Feb-92 8 10.7 90% 333 124
Jan-92 6 10.1 81% 86 139
Dec-91 8 10.3 87% 88 198
Nov-91 8 10.5 88% 43 188
Oct-91 14 8.6 83% 609 200
Sep-91 22 7.4 85% 279 228
Aug-91 23 7.3 85% 787 179
Jul-91 25 7.7 93% 455 170
Jun-91 22 7.8 89% 429 202
May-91 21 7.7 86% 31 201
Apr-91 15 9.6 95% 15 178
Mar-91 11 11.8 107% 8 148
Feb-91 10 12.2 108% 13 171
Jan-91 7 11.8 97% 6 138
Dec-90 7 13.2 108% 20 0.1
Downstream: Spring Valley Road Bridge
Temp DO Saturation Fecal Conductivity
7 10.6 87% 200 192
8 9.6 81% 229 310
14 9.6 93% 621 455
17 7.9 82% 1192 505
22 6.8 78% 399 580
26 6.9 85% 21 550
27 8.2 103% <4 500
0% bridge out - road closed
19 7.4 80% 31 353
13 11.4 108% 12 225
10 9.6 85% 13 230
7 11.3 93% 61 214
9 10.1 87% 10 205
9 9.8 84% 128 254
14 7.8 76% 90 294
15 7.5 74% 549 330
22 6.8 78% 539 418
26 6.1 75% 518 385
24 6.1 72% 567 410
21 6.1 68% 270 406
17 6.8 70% 443 314
12 9.2 85% 139 319
12 10.1 94% 118 271
9 8.9 77% 180 216
9 9.7 84% 48 238
10 8.6 76% 56 278
11 11.8 107% 48 361
16 8.1 82% 69 398
23 7.1 83% 140 536
24 7.3 87% 284 415
25 7.5 91% 438 474
22 7.5 86% 783 490
21 7.6 85% 15 407
16 9.6 97% 9 314
12 11.8 110% 5 254
11 12.2 111% <4 313
9 11.6 100% 4 255
7 12.7 104% <10 0.11

Downstream: Panorama
Downtown: oonfluanca
i>a%/lbws DO Tam Saturation Cond SOD Saoo11 Chfoaa Tphoa 'Prat TKN hex
12/2/93:.15
035
1.1
1218/93:.15
1
1.1
13
12/15/93:.15
0.5
1
12/22/93:.15
OA
0.8
102
9.6
9.8
11.6
10.8
10.4
10.8
14.0
12.8
13.2
10-.8
10.7
10.8
10
10
10
10
9
10
9
5
7
7
90%
85%
87%
103%
93%
92%
93%
109%
105%
108%
5 84%
5 84%
5 84%
160
225
180 42 0.55
168
210
187 4.7 0.56
210
155
190
190 3.8 0.50
180
200
180 1.8 040
0.55 7.68 3.3 4.38
11/3/93:.15 122 14 118% 130
0.51 11.8 14 115% 140
1 11.8 14 115% 140 4.6 0.51 02 3.64 1.6 204
11/1 0/93:.15 11.8 10 105% 235
0.27 102 10 90% 330
0.54 102 10 90% 330 32 027
11/17/93:.15 8.8 15 87% 550
0.38 8.4 16 85% 550
0.52 8.4 18 85% 550 22 0.38
11/24/93:.15 18.2 18 171% 145
0.06 15.6 12 145% 200
1.3 14.0 12 130% 200 7.3 0.68
10/6/93:.15 12.2 19 132% 230
0A 11.6 13 110% 270
0.6 12.1 15 120% 250 5.9 0.40 0.0308 0.42 5.88 3.6 2.28
10113/93:.15 8.0 18 85% 250
0.5 7.4 12 69% 300
1 8.0 15 79% 280 7.0 0.50
10120/93:.15 9.2 21 103% 380
0.45 7.8 20 86% 370
0.9 7.8 20 88% 370 4.0 0.45
10/27/93:.15 9.7 14 94% 270
041 8.0 14 78% 270
0.82 8.2 16 83% 270 42 0.41
Data/Mehra DO Temp Satwatlon Cond SOD Smolt Chicon T•phoa Trait TKN NOx
12/2193:.15
1.7
2
3
4
4.5
12/8/93:.15
1
1.5
2
3
4
4.5
12/15193:.15
1
1.9
2
3
4
4.5
12/22/93:.15
1
1.0
2
3
3.5
10.3 10 91% 100
9.9 11 90% 100
9.9 11 90% 115 3.8 0.85
9.0 11 82% 100
7.8 11 71% 105
8.3 11 75% 120
9.7 10 86% 140
10.6 11 98% 100
10.4 11 94% 100
102 10 90% 120 4.3 0.77 0.12 4 3.4 0.6
10.4 11 94% 118
9.3 11 84% 120
102 11 93% 100
92 11 83% 100
13.8 4 105% 120
13.8 8 118% 115
132 8 111% 105 3.7 0.9S
13.8 8 116% 100
132 8 111% 105
11.8 8 99% 110
102 8 86% 115
132 8 108% 100
132 6 108% 90
132 6 106% 95 3.8 0.80
12.8 6 102% 95
124 7 102% 110
12.0 7 98% 125
11 /3/93:.15 11.8 15 117% 100
1 11.8 15 117% 125
2 11A 15 113% 100
21 10.4 15 103% 100 3.7 1.05 0.09 2.33 1.8 0.53
3 11.0 15 109% 120
3.5 10.8 15 107% 150
11/10/93:.15 121 12 112% 100
1 10.8 12 100% 110
2 11.8 12 110% 110
2.2 10.8 12 100% 110 3.7 1.11
3 11.4 12 106% 140
3.5 10.7 12 99% 140
11/17/93:.15 13.8 11 125% 130
1 12.9 16 131% 120
1.96 9.8 15 97% 120 4.7 0.98
2 127 15 126% 120
3 11.3 14 110% 110
4 102 14 99% 110
11/24/93:.15 13.4 17 139% 100
1 12.6 18 133% 100
1.92 11A 18 121% 90 5.1 0.96
2 11.0 18 116% 130
3 11.4 18 121% 130
3.5 12.0 18 127% 150
10/0/93:.15 12.0 21 135% 125
1 10.9 18 115% 150
1.7 10.7 21 120% 140 52 0.83 0.0498 0.02 2.23 2.1 0.13
2 11.0 21 123% 120
3 10.7 21 120% 105
4 9.8 21 110% 220
10/13/93:.15 82 13 78% 130
1 7.6 12 71% 140
1.5 7.3 12 68% 140 8.7 0.76
2 74 12 69% 140
3 72 12 67% 180
4 6.8 11 62% 220
10/22/93:.15 13.4 20 147% 120
1 13.0 20 143% 120
1.5 12.0 20 132% 120 4.5 0.75
2 12.8 20 141% 115
3 12.8 19 138% 115
4 11.6 18 123% 220
4.5 10.6 19 114% 220
10/27/93:.15 14.5 17 150% 125

Downstream PowerMee
Downstream: confluence
Data/ Who DO Tamp Saturation Cond BOD Saw hl Chlor a T•phoa T.n*r TKN NOx
9/2193:.15 8.2 28 105% 420
0A 7.2 28 92% 445
0.8 7.2 28 92% 445 7.3 0.40
9/8/93:.15 10.5 27 132% 120
0A9 8.8 26 109% 330
0.98 8.8 26 109% 330 9.0 0.49 0.072 0.37 6.3 1.8 4.5
9/15/93:.15 - 8.2 24 97% - 338
0.71 3.8 24 45% 340
0.74 7.7 24 91% 340 5.4 0.37
9/22/93:.15 12.5 29 163% 200
0.45 8.0 29 104% 180
0.74 10.2 29 133% 180 8.3 0.37
9/29/93:.16 11.8 25 143% 130
0.38 7.0 21 79% 220
0.78 7.0 21 79% 220 8.1 0.38
8U1 3:.15 8.2 26 101% 260
0.5 5.6 25 68% 260
0.7 5.6 25 68% 260 6.9 0.35 0.049 1.83 621 4.3 1.91
811/93:.16 13.0 32 178% 170
0.52 11.5 31 155% 180 11.5 0.52
8/18/93:.15 11.4 28 148% 250
0.54 9.1 28 116% 250 8.9 0.27
0.58 9.1 28 116% 250
&P15/93:.15 9.1 27 114% 300
0A 9.0 27 113% 310
0.66 9.1 27 114% 282 7.8 028
7/7/93:.15 14.0 31 188% 185
0.42 13.2 30 175% 310 7.3 0.42 0.18 2.64 2.5 0.14
1 11.8 27 148% 410
1.3 9.8 27 123% 470
7/16193:.13 9.7 29 128% 195
049 9.0 29 117% 210 12.6 0.49
Date/ Nowa DO Temp Saturation Cord DOD !Jacobi C1 !opa T•phos T TKN NOx
1.8
2
3
4
4.5
14.5
14.5
9.8
7.6
6.8
6.2
912193:.15 8.5
72
1A 7.2
2 7.0
3 6.2
4 4.8
9/0193:.13 9.7
1 7.5
1.7 7.5
2 7.7
3 7.3
4 5.4
4.5 4.3
W15/93:.15 9.8
1 8.1
1.7 8.8
2 8.0
3 8.0
4 6.3
4.5 5.4
9/22/93:.15 9.8
1 9.6
1.5 9.1
2 7.7
3 7.7
4 7.7
4.5 7.8
9/29193:33 10.0
1 10.0
1.6 9.4
2 9.8
3 9.0
3.5 8.2
8/4/93:.15 8.5
3.5
1A 3.5
2 3.5
s 3.5
4 3.5
5 3.4
8/11/93:.15 9.8
1 8.0
1.5 8.0
2 7.8
3 7.2
4 5.3
5 4.0
8/18/93:.15 7.4
1 9.7
1.3 6.8
2 9.3
3 7.8
4 7.8
5 7.5
8/25 93:.15 9.9
1 9.4
1.5 9.4
2 8.5
3 5.6
4 4.8
17
17
17
17
17
17
VI fT N iil iT VI M O 0 0 0 0 0 i11 DI DI S tI Of QI V I W O W V S IN U O O O O
150%
150%
101%
79%
70%
84%
120
140 4.3 0.88
115
130
120
190
112% 140
94% 140
94% 140 4.7 0.70 0.098 <0.02 2.01 2 0.01
91% 140
81% 160
81% 200
120% 140
94% 140
96% 140 5.1 0.85
98% 140
93% 180
69% 180
54% 190
121% 138
100% 150
109% 135 4.4 0.85
99% 135
99% 140
76% 167
65% 200
125% 150
125% 170
118% 170 4.5 0.74
100% 175
100% 170
98% 180
100% 195
121% 140
121% 125
114% 125 5.1 0.79
110% 125
109% 130
99% 15S
86% 165
48% 160
48% 160 3.6 0.70 0.026 0.13 2.65 2.5 0.15
46% 160
48% 180
48% 160
44% 200
123% 140
100% 130
102% 125 5.0 0.75
100% 125
92% 130
88% 135
51% 180
96% 130
126% 130
88% 130 4.3 0.67
121% 130
101% 155
99% 140
98% 140
126% 140
120% 135
120% 140 5.3 0.76
109% 140
72% 138
60% 160
717/93:.15 11.4 30 151% 135
0.64 10.4 30 138% 138 4.3 0.84 < 0.02 2 2 < 0.11
1 10.4 30 138% 140
2 9.1 29 118% 128
3 6.9 28 88% 120
4 4.6 27 58% 120

Downstream: Powerikwe
Daft Mama DO Tamp Saturation Cand DOD Saco hl Chlori T.phoe T.nitr TKN NOx
7/22193:.15
0.34
o.3a
7/28/93:.13
0.55
10.4
9.1
9.1
18.0
14.0
30
30
30
26
' 30
138%
120%
120%
222%
185%
210
210 12.6 0.34 0.13 0.41 4.81 3.7 0.91
210
225
250 8.7 0.55
Downstream: oonfluenoe
Oats/ Nebr. DO Temp Satewation Cond BOO Seoohl Chlorw T.phoa Twit TKN NOot
612193:.15 9.8 26 119% 130
0.41 6.6 23 77% 170 4.6 0.41
1 6.1 21 68% 230
1.3 4.6 21 52% 240
6/9193:.15 8.2 27 103% 170
0.61 7.2 25 87% 200 4.1 0.61 0.2 3.13 2 1.13
1 5.6 24 67% 330
1.3 4.8 24 57% 365
6116/93:.t 5 10.4 26 128% 110
0.88 8.8 23 103% 370 4.6 0.88 0.06
1 7.2 23 84% 370
1.3 6.0 22 69% 370
6193/93:.15 13.8 28 170% 193
0.26 12.5 26 154% 205 8.0 0.26
O.5 122 26 148% 215
6/30/93:.18 8.1 27 102% 225
0.65 6.1 24 61% 370 8.3 0.65
518/93:.15 12.6 19 138% 120
0.86 12.0 19 129% 130 4.8 0.88 0.053 0.11 2.81 2.3 0.51
1 12.0 19 129% 130
2 9.4 16 93% 150
2.2 6.8 15 67% 170
51293:.18 14.4 23 168% 150
0.41 13.8 22 158% 270 6.2 0.41
1 10.7 22 122% 200
1.3 9.1 21 102% 270
5/19/93:.18 12.7 24 151% 150
0.81 11.4 24 135% 150 5.8 0.81
1 10.8 24 128% 150
1.5 3.0 23 35% 320
5/28/93:.15 8.0 20 88% 120
0.75 8.0 21 90% 130 4.3 0.75
1 8.0 21 90% 110
1.5 8.0 20 88% 120
5 1.9 28 23% 200
7116193:.16 7.9 31 108% 140
1 7.5 30 99% 140 6.2 1.00
2 6.3 30 83% 135
3 6.7 30 75% 130
4 6.3 30 70% 180
5 4.8 30 63% 290
7/22/93:.15 7.5 30 99% 130
1 7.1 30 94% 130 4.4 1.00 0.037 0.11 2 2 < 0.11
2 5.2 30 69% 130
3 4.9 30 65% 130
4 6.0 - _ _30 66% 140
5 5.3 30 70% 220
7/2893:.15 14.5 31 195% 140
1 82 31 110% 130
1.7 9.0 30 119% 120 4.7 0.87
2 7A 30 98% 125
3 8.8 30 9096 140
4 5.7 30 75% 190
5 3.6 30 48% 230
6/2/1993:.15 9.8 25 119% 110
0.9 9.8 25 119% 110 3.5 0.90
t 9.8 25 119% 110
2 8.8 24 102% 100
3 7.7 24 91% 110
4 7.1 23 83% 130
8 6.6 22 78% 200
S.4 5.6 22 64% 205
6 N93:.18 9.7 28 124% 115
1 10.4 26 128% 120 3.6 1.00 < 0.02 1.72 1.6 0.12
2 7.0 25 85% 116
3 6A 24 76% 110
4 6.3 23 62% 100
5 4.4 22 50% 190
84 3.8 22 43% 190
6/ 16193:.15 10.4 27 130% 120
1 9.0 27 113% 120 3.5 1.00 0.028
2 8.6 26 106% 115
3 8.3 26 102% 120
4 7A 26 91% 130
8 8.3 25 76% 135
5.5 5.8 25 70% 135
6/23193:.15 9.9 27 124% 121
0.7 9.7 26 120% 121 5.0 0.70
1 9.7 26 120% 121
2 9.6 26 118% 120
3 8.8 24 105% 105
4 2.0 24 24% 107
8 3.8 22 43% 235
8/30/93:.15 8.8 28 112% 130
1 7.0 28 89% 130
1.3 7.0 28 89% 130 4.4 1.30
2 6.2 28 79% 130
3 5.6 28 72% 130
4 5.0 27 63% 140
S 4.3 26 53% 270
5/5193:.15 11.8 20 130% 100
0.92 11.8 20 130% 100 3.5 0.92 0.053 0.07 2.01 1.7 0.31
1 11.8 20 130% 100
2 7.8 16 79% 90
3 6.9 14 67% 110
4 5.4 14 52% 100
8 4.6 14 45% 110
6 3.6 13 34% 140
8/ 12/93:.13 10.6 24 128% 120
0.9 9.6 23 112% 120 4.4 0.40
1 9.6 23 112% 120
2 5.6 20 62% 130
3 5.4 17 56% 120
4 5.0 16 51% 120
5 5.0 15 50% 130
5.5 4.8 15 48% 150
5/19193:.16 122 24 145% 110

Downstream:
Powerpnss
OmniDaiws DO Tamp Saturation COnd DOD 8soohl Chfor►a Tithes T-nar TKN NOx
Downslrs n: oantlusnos
Data/lbws 00 Tamp 8at*sation Coed DOD Bsoohl Chlora T•phos Tnilr TKN NOx
343/93:.15 9.8 9 84% 215
03 6.8 9 59% 220 4.8 0.30 0.97 6.07 2.3 3.77
0.45 4.3 9 37% 250
3110193:.15 8.8 8 74% 200
0.25 8.8 8 74% 210
0.75 6.4 8 54% 230
3/17/93:.15 11.7 8 98% 80
0.55 11.5 8 97% 80 3.9 0.55
1 10.4 8 87% 80
2 9.8 8 82% 75
3 4.2 7 34% 75
4 1.6 6 13% 85
20/93:.15 12.5 4 95% 130
o A 12.5 5 98% 145 5.2 0.80 0.14 1.95 1.66 0.29
0.9 12.5 5 98% 14S
2/10/93:.15 12.0 8 101% 80
0.42 11.8 8 99% 80 5.0 0.42
0.57 11.6 8 97% 120
2/17193:.15 11.0 9 95% 190
0.37 11.0 9 95% 200 3.5 0.37
03 11.0 9 95% 200
2124/93:.15 13.0 6 104% 135
0.35 12.9 6 103% 135 6.3 0.35
03 12.3 8 98% 135
1/1093:.15 9.5 10 84% 240
0.25 9.6 10 85% 250 4.9 0.25 0.14 0.91 <1.0 0.91
0.35 9.6 10 85% 250
1/13/93:.16 9.2 9 79% 120
0.45 9.2 9 79% 120 5.5 0.45
1 9.4 9 81% 140
2 9.6 9 83% 150
1/20/93:.15 10.6 8 89% 80
0A7 10.6 8 89% 80 8.8 0.47
1 10A 7 8S% 100
2 10.2 7 84% 110
1r27/93:.15 11.0 6 88% 125
0A6 11.0 6 88% 140 <1.0 0.48
1
t.02
2
3
4
5
5/26/93:.15
1
2
3
4
5
12.2
12.0
11.6
8.4
5.5
3.8
9.4
8.7
8.5
7.1
S.4
3.3
24 145%
24 143%
22 133%
21 94%
19 59%
18 39%
21 105%
23 101%
22 97%
22 81%
20 59%
20 36%
110
110 4.4 1.02
110
125
100
110
120
110 3.6 1.00
105
105
115
130
3/343:.15 13.0 8 109% 105
0.75 12.6 7 103% 105 4.0 0.75 0.13 2.45 1.6 0.85
1 12.4 7 102% 105
2 11.7 7 96% 95
3 11.7 9 101% 130
4 11.2 6 90% 145
3/10/93:.15 11.2 11 102% 70
0.33 11.0 10 98% 70 3.1 0.38
1 11.0 10 98% 70
2 10.6 9 91% 70
3 10.5 9 91% 75
4 10.4 9 90% 85
4.5 10.4 8 87% 100
3/17/93:.15 11.6 9 100% 40
0.6 11.6 9 100% 40 1.9 0.60
I 11.6 8 97% 70
2 11.5 8 97% 70
3 11.5 8 97% 70
4 11.3 7 93% 70
s 11.2 7 92% 70
6 11.1 7 91% 80
7 11.0 7 90% 90
6 11.0 7 90% 80
2/3/93:.15 12.1 8 97% 80
0.6 12.3 6 98% 80 2.8 0.60 0.05 0.25 < 1.0 0.25
1 12.3 6 98% 85
2 11.3 6 90% 100
3 10.6 6 85% 90
4 9.5 6 76% 90
2/10/93:.15 122 8 103% 80
0.58 12.2 8 103% 80 5.7 0.58
1 12.0 8 101% 80
2 11.7 7 96% 90
3 11.3 7 93% 110
2117193:.15 124 8 104% 98
04 11.8 8 99% 100 4.4 0.40
1 11.2 8 94% 100
2 11.8 8 99% 100
3 12.0 8 101% 110
3.5 11.4 8 95% 110
2/24/93:.15 13.1 7 107% 95
0.59 12.8 7 105% 90 4.7 0.59
1 12.8 7 105% 90
2 124 7 102% 100
3 12.4 7 102% 100
4 12.2 7 100% 100
43 12.0 7 98% 105
18663:.15 10.8 9 93% 100
0.5 10.8 9 91% 100 3.1 0.50 0.05 2.19 1.3 0.89
1 10.4 9 90% 110
2 10.0 9 86% 110
3 10.4 9 90% 110
4 10.0 9 86% 120
1/13/93:.15 9.3 9 80% 85
0.7 9.3 9 80% 85 2.8 0.70
1 9.3 9 80% 90
2 9.0 9 78% 90
3 8.8 9 76% 95
4 8.7 8 73% 105
5 8.5 8 71% 110

Downstream: Powe Mass
DOwnstream: OOn1ti14n0*
Dats/lbws DO Tamp Saturstlon Caul DOD 8soohl Chlona T.phos Tiltr TKN NOi
1
11.0
6
88%
140
122/92:.15 112 8 94% 170 2.4 0.18 3.65 < 1.0 2.65
0.75 11 A 6 96% 170
12/9/92:.15 12.6 6 101% 130 3.2
0.6 12.3 6 98% 130
12/16/92:.15 8.8 8 74% 180 2.0
0.65 7.2 8 61% 170
1222/02:.15 9.0 9 78% 220 <1.0
0A1 9.0 9 78% 220
12/30/92:.15 9.0 9 78% 230
0.35 8.5 9 73% 230
11/4192:.15 6.7 17 69% 180 5.1 0.18 2.05 <1.0 1.05
0A5 6.3 17 65% 180
11112/92:.15 9.4 14 91% 110 3.6
0.58 8.2 13 78% 210
11n6/92.15 10.0 10 89% 160 2.7
0.72 0.4 9 81% 280
11/25192:.15 8.9 14 86% 160 2.8
0.55 8.8 14 83% 170
1017192:.15 10.8 15 105% 230
0.51 9.2 14 89% 250 2.8 0.51 0.049 02 5.63 <1.0 4.63
10114/92.15 13.1 18 138% 120
0A6 11.8 17 122% 220 7.1
10121/9•4.15 8.8 12 82% 350
0.43 8.8 13 84% 330 3.0
10/28/92:.15 7.8 17 81% 250
0.5 7.2 16 73% 330 3.5
Dab►dere DO Temp Saturation Card DOD 8soohl Chke-a T-phas T4thr TKN Nos
5.3
1/20193:.15
0.64
1
2
3
4
1/27/93:.15
0.57
1
8
8
8
8
8
7
7
7
7
7
2 12.2 7
3 --- ----- -121 -- 7
4 12.1 7
5 121 7
8.5
10.3
10.3
10.0
10.0
9.8
9.5
12.2
122
122
71%
87%
87%
84%
84%
80%
78%
100%
100%
100%
100%
99%
99%
99% 80
110
80
80 7.4 0.84
80
90
110
110
85
85 1.5 0.57
85
90
90
90
12/2/92:.15 10.4 11 94% 110 2.3
1 102 11 93% 110
2 10.0 11 91% 110
3 8.6 11 78% 120
4 9.0 11 82% 120
12/9192:.15 122 7 100% 90 4.4
1 12.0 7 98% 90
2 12.0 7 98% 90
3 11.5 7 94% 90
4 11.0 7 90% 110
12/16/22:.15 10.4 7 85% 90 22
1 10.5 7 88% 90
2 10.5 7 86% 90
3 10.5 7 86% 90
4 10.5 7 88% 95
12/22/92:.15 10.8 9 93% 100 2.1
1 10.4 8 87% 100
2 10.2 8 88% 100
3 10.2 8 86% 110
4 10.2 8 88% 110
12/30/92:.15 9.9 9 85% 120 3.4
1 9.6 9 83% 125
2 9.6 9 83% 130
3 9.4 9 81% 130
4 92 8 77% 140
11/4192:.15 10.1 17 105% 120 4.4
1 10.1 17 105% 120
2 8.5 17 88% 115
3 9.8 18 99% 130
4 9.2 18 93% 190
11/12/92: .15 10.4 14 101% 100 3.4
1 10.4 14 101% 100
2 10.3 14 100% 100
3 9.8 14 95% 100
3.5 9.4 14 91% 120
11/16192:.15 10.8 12 100% 100 3.0
1 10.6 12 98% 100
2 9.6 11 87% 110
3 9.5 11 86% 140
4 9.3 11 84% 150
11125/92:.15 9.7 14 94% 115 2.7
1 9.5 14 92% 115
2 8.8 14 83% 115
3 8.4 14 82% 115
4 7.9 14 77% 150
0.03 2.16 1.6 0.56
0.1 1.52 12 0.32
10/7192:.15 10.6 18 112% 110
0.71 10.3 18 109% 110 3.5 0.71 0.063 0.03 1.3 <1.0 0.3
1 10.0 18 106% 118
2 9.8 18 104% 110
3 9.6 18 101% 110
4 9.4 18 99% 140
10/11/92:.15 11.8 19 127% 115
0.03 11.8 19 127% 115 4.7 0.83
1 11.8 19 127% 115
2 10.5 10 113% 115
3 9.6 19 104% 120
4 8.8 19 95% 160
10/21/92:.15 11.0 18 111% 115

Downstream: Pawar111aa
DownsIte n: confluence
Dale/Mahe DO Tamp Satundlon Cond DOD 8sochl Chlora T-phoa Tier TKN NO><
Dols/Nigro DO Temp Satundlon Cond DOD Seoohl Chlor•a T-phoa Tal TKN N0x
0.72
1
2
3
3.5
10/28/92:.15
0.74
1
2
3
3.5
Witt .15 9.3 26 115% 220
0.19 7.7 26 95% 230 8.2 0.19 0.77 4.12 3.07 12 1.87
0.58 6.3 26 65% 260
9/10/92:.13 13.2 28 169% 255
04 12.0 28 153% 260 7.8 0.40
0.0 3.1 27 39% 260
9/10192 .15 12.6 23 147% 200
0.35 7.2 23 84% 200 13.3 0.35
923192:.15 8.4 22 96% 150
042 7.6 23 89% 150 S2 0.42
0.7 7.0 24 83% 150
930192:.15 10.8 19 117% 140
041 10.0 20 110% 150 42 0.41
0.53 9.2 20 101% 150
85/92.15 11.8 28 151% 200
04 11.5 28 147% 200 8.4 0.40 0.132 0.06 1.99 1.1 0.89
049 11.4 28 148% 200
812/92:.15 10.8 28 138% 170
04 10.5 28 134% 170 6.8 0.40
0.54 102 28 130% 170
0/19/92: .15 11.8 26 145% 150
0.59 7.2 24 86% 225 1.5 0.59
1 2.0 23 23% 285
8926/92:.15 14.0 26 173% 270
0.24 14.0 26 173% 270 10.6 0.24
048 8.2 26 101% 280
min .15 9.0 27 113% 190
0.56 7.6 27 95% 190 8.0 0.58
1 6.4 25 65% 300
7/8192.15 10.4 27 130% 140
0.43 7.8 24 93% 250 6.8 0.43 < 0.20 2.12 1.42 < 1.0 0.42
1 7.2 23 84% 250
7115192.15 6.8 28 87% 390
10.3
9.6
9.5
9.5
9.6
11.4
11.2
112
10.8
10.4
92
9/292:.15 12.1
047 9.2
1 7.5
2 8.3
3 4.6
4 2.6
WW2: .16 11.6
0.76 12.6
1 9.4
2 7.8
3 6.1
3.5 52
9/1819T.15 10.7
0.71 7.9
1 7.9
2 7.8
3 6.3
4 4.6
9/23/92:.15 8.5
0.61 8.4
1 8.4
2 72
3 6.8
4 5.8
9/30/92.15 10.0
0.0 10.0
1 10.0
2 9.5
3 9.3
4 9.1
8/5/92:.15 10.8
0.99 102
1 102
2 9.6
3 9.0
4 8.5
4.5 7.6
8/12/9Z .15 11.6
0.85 11.2
1 11.2
2 8.4
3 5.0
4 4.2
0/19092.15 11.0
1 11.4
2 7.6
3 6.4
4 5.3
8/20/92:.15 14.4
0.01 10.8
1 10.8
2 7.8
3 6.5
3.5 42
7/2192:.15 9.8
0.77 9.3
t 8.0
2 6.5
3 6.0
4 4.2
4.5 2.0
18
16
16
16
16
18
17
17
16
15
15
104%
96%
96%
96%
96%
121%
116%
118%
109%
103%
91%
115 4.6
116
116
115
180
120
115 3.7 0.74
115
110
130
200
0.72
149% 140
109% 140 5.9 0.47 0.078 0.07 1.31 12 0.11
84% 140
91% 140
63% 130
29% 185
148% • 140
161% 140 6.1 0.76
120% 140
100% 140
77% 160
65% 175
127% 130
98% 135 4.5 0.71
96% 135
94% 135
76% 100
55% 205
103% 130
102% 130 4.3 0.61
104% 130
89% 130
84% 140
72% 160
112% 120
112% 120 3.3 0.60
112% 120
107% 120
104% 120
100% 120
138% 140
130% 135 5.1 0.99 0.088 0.05 1.11 <1.0 <0.11
130% 135
123% 130
115% 140
107% 160
95% 260
150% 160
146% 140 4.3 0.33
146% 140
107% 140
63% 160
53% 170
138% 125
138% 130 7.4 1.00
92% 125
77% 125
63% 145
184% 140
136% 140 5.4 0.81
136% 140
98% 140
80% 145
52% 160
120% 140
117% 140 4.7 0.77
100% 140
80% 140
71% 130
48% 120
23% 120

Downstream: Pow/Ones
Dale /&. is DO Temp 8aturWon Card ROD Such! Chkrs T.phos Tn!tr TKN NOx
0.43 8.2 28 79% 370 5.2 0.43
0.5 6.2 28 79% 380
7/22/92.13 7.8 27 98% 380
0.42 6.8 26 84% 430 42 0.42
7/29/92.15 102 29 133% 170
0A8 9.4 29 122% 180 7.9 0.48
0.61 8.6 28 110% 195
63192.15 9.3 24 110% 120
0A6 9.3 24 110% 120 52 0.47 <.020 0.0S 2.83 2 0.83
1 6.4 19 69% 310
1.3 6.2 19 87% 310
6/10192.15 10.0 23 117% 160
0.73 6.2 24 74% 180 5.4 0.73
1 6.2 24 74% 180
1.3 4.0 22 46% 300
6/17192:.15 11.0 25 133% 180
0.6 7.0 22 80% 350 5.9 0.60
1 7.0 22 80% 350
yam .15 8.8 22 101% 240
0.47 7.6 22 87% 330 7.1 0.47
1 6.2 20 68% 370
5/6/92.15 10.2 17 106% 150
0.41 102 17 106% 150 6.9 0.41 0.087 0.34 1.59 < 1.0 0.59
1 6.5 17 67% 160
913/92.15 10.6 21 119% 160
1 5.4 18 57% 340
1.2 4.8 18 51% 350
5120/92.15 6.8 21 76% 130
0.58 6.8 21 78% 130 4.1 0.58
1 5.2 21 58% 200
1.1 4.6 18 49% 280
5/27192.15 8.3 18 88% 160
0.58 8.3 19 90% 180 3.8 0.58
1 6.2 19 67% 170
1.1 5.6 19 60% 170
Downsimsm: oanllwna.
Date / M.trs DO Temp !Munition Card ROD Mooch! Caere Tythos T-nitr TKN NOx
7/6192.15 10.6 27 133% 128
0.63 8.8 27 110% 128 3.4 0.86 0.036 0.94 1.11 < 1.0 < 0.11
1 7.0 27 88% 128
2 7A 27 93% 122
3 52 27 65% 130
4 3.2 26 39% 140
4.2 3.0 25 38% 168
7/15/92.15 8.2 30 108% 145
0.75 8.0 24 95% 148 4.7 0.75
1 7.0 29 91% 148
2 32 28 41% 120
3 32 _26 39% 118 4 32 25 39% 128
4.2 3.2 25 39% 200
7/22/92:.15 10.4 29 135% 140
0.66 8.5 29 111% 140 5.5 0.86
1 8.5 29 111% 140
2 6.2 28 79% 140
3 5.5 27 69% 130
4 3.4 25 41% 120
7/29/92:.15 10.5 29 137% 140
0.69 7.6 29 99% 140 4.8 0.89
I 7.6 29 99% 140
2 7.0 29 91% 145
3 5A 28 69% 170
4 3.7 28 47% 190
6/3/92:.15 10.6 24 126% 130
1 10.2 24 121% 130 32 1.00 0.0414 < 0.01 1.28 < 1.0 0.28
2 8.8 22 101% 130
3 6.4 21 72% 130
4 6.0 19 65% 140
4.5 6.0 19 65% 140
6/10/92.15 10.0 24 119% 135
0.96 9.8 22 112% 130 3.8 0.96
1 9.8 22 112% 130
2 8.4 20 70% 110
3 4.2 19 45% 110
4 3.8 19 41% 160
5 32 19 35% 160
5/17/92:.15 11.6 26 143% 150
0.67 112 25 136% 140 3.0 0.87
I 112 25 136% 140
2 8.4 25 102% 135
3 8.6 24 78% 140
4 4.4 23 51% 160
6/34/92: .15 9.2 24 109% 130
0.93 7.6 24 90% 130 4.1 0.93
1 7.6 24 90% 130
2 6.4 24 76% 130
3 5.3 24 63% 130
4 4.5 23 52% 130
5/6122.15 10.6 18 112% 110
0.66 10.6 18 112% 110 3.9 0.66 <0.020 0.45 124 < 1.0 0.24
1 10.4 18 110% 110
2 9.8 18 104% 110
3 9.8 18 104% 110
4 9.2 18 97% 110
5 9.6 17 99% 160
5113N2.15 12.0 20 132% 120 3.1 0.06 1014 a 1.0 0.14
1 12.0 20 132% 120
2 12.0 20 132% 115
3 11.0 18 116% 110
4 11.0 17 114% 118
4.5 11.0 16 111% 160
5/20/92.15 9.0 22 103% 120
0.66 9.0 22 103% 120 2.5 0.88
1 8.8 22 101% 120
2 8.5 22 97% 120
3 8.4 22 96% 120
4 8.0 22 92% 130
4.5 7.6 20 84% 240
5/27/92.15 7.5 21 84% 125
0.78 7.2 21 81% 125 2.3 0.76

Doumstrskn: PowarlbM
Dais / Mean DO Tamp Saturation Land DOD saoohl Chia,. Tahoe T-nttr TKN Mix
4/2/42: .15 12.2 12 113% 160 5.6
0.44 11.8 13 112% 180
418192:.15 9.8 14 95% 250
0.25 9.8 13 93% 305 3.7
0.31 9.8 13 93% 305
4115/92:.14 8.4 16 85% 260 5.9
0.15 10.4 16 - 105% 260
0.25 7.8 16 79% 280
4/22/92:.15 7.1 16 72% 150 5.1
0.39 4.5 15 45% 115
4129192:.15 8.2 18 87% 130 7.5
1 8.8 17 91% 130
1.8 8.8 17 89% 130
3/4/92:.15 12.0 12 111% 250 4.6
0.34 11.0 12 102% 250
3/11/9t .15 10.8 12 100% 255 4.7
0.45 10.0 12 93% 255
3/18192:.15 162 12 150% 185 5.4
0.32 16.0 11 145% 200
3/25/92:.15 14.6 12 13B% 156 7.7
0.3 14.8 12 137% 160
0.13 5.27 1.5 3.77
0.25 0262 0.32 9.9 < 1.0 8.9
0.14 0.38 7.61 1.8 5.81
025 2 < 1.0 1
0.1 1.97 1.5 0.47
0.19 2.73 < 1.0 1.73
0.15 224 1.4 0.84
021 3.81 1.1 2.71
0.11 3.52 1.1 2.42
05/92:.15 2.8 8 24% 160 4.8 0.21 6.19 < 1.0 4.19
04 2.4 7 20% 168
2112/92:.15 7.8 7 64% 150 4.6 0.33 5.82 2.1 3.52
04 6.8 7 56% 140
2/19/92:.15 9.3 11 84% 160 2.7 0.68 8.62 1.3 5.32
031 4.0 9 34% 200
2/28192:.15 102 9 88% 95 7.9 0.18 2.18 < 1.0 1.18
0.75 102 9 88% 85
Dovonstrasm: oonfluanos
Dats/Molars DO Tamp Saturation Cond DOD Saoohl Chlori Tyhos Trani TKN tax
2
3
4
4.5
7.3
7.1
6.8
6.5
6.3
22
21
21
21
21
84%
80%
76%
73%
71%
125
125
140
150
180
412 92:.15 11.0 12 102% 90 3.5
1 10.6 12 08% 90
2 10.6 10 94% 90
3 10.4 11 94% 90
4 102 12 95% 90
418192:.1 S 12.8 14 122% 100
0.11
1.88
<1.0
0.86
-0.3 -12.4-------14-120% 100 4.8- 0.30 0.397 _ 0.08 2.04 <1.0 1.04
1 12.4 13 118% 100
2 122 13 116% 100
3 122 13 116% 100
4 11.8 12 110% 95
4.7 11.6 13 110% 95
4/15/92:.18 13.8 18 144% 120
0.29 12.2 18 129% 120 4.8 0.29 0.11 1.49 <1.0 049
1 11.5 18 122% 120
2 11.0 17 114% 120
3 9.6 16 97% 100
4 8.4 18 89% 90
4.5 7.8 12 72% 110
4/22192:.15 11.0 19 119% 110 42 < 0.01 1.57 <1.0 0.57
1 9.4 18 99% 105
2 8.6 16 87% 100
3 7.8 13 74% 90
4 6.4 13 61% 85
412092:.15 9.8 17 101% 110 5.6 0.02 12 <1.0 0.2
1 9.8 16 99% 110
2 8.5 18 88% 110
3 B.4 16 85% 110
4 92 15 91% 110
5 9.0 15 89% 100
6 8.4 16 85% 130
3/4192:.15 12.8 12 119% 80 6.1 0.08 2.02 <1.0 1.02
1 122 12 113% 100
2 112 12 104% 90
3 8.8 12 82% 100
3.5 7.0 11 64% 100
3111192:.1S 11.0 12 102% 85 3.5 0.08 1.78 <1.0 0.78
1 10.8 12 100% 105
2 10.8 12 100% 105
3 9.5 12 88% 105
4 9.0 11 82% 105
3118192:.15 14.8 12 137% 100 5.8 0.06 2.48 <1.0 1.46
1 13.7 10 121% 90
2 13.5 10 120% 90
3 13.3 10 118% 90
4 13.0 10 115% 100
3/25/92:.13 12.6 12 117% 100 6.2 0.03 1.75 < 1.0 0.75
1 11.8 12 110% 100
2 11.0 11 100% 95
3 9.6 11 87% 90
4 9.0 11 82% 90
2/5192:.15 3.8 7 31% 100 4.0 0.04 3.17 < 1.0 2.17
1 32 7 26% 100
2 2.8 7 23% 100
3 3.0 7 25% 105
2112192:.15 11.3 6 90% 90 3.8 0.1 2.48 <1.0 1.48
1 8.8 8 70% 80
2 5.5 6 44% 85
2.5 4.1 6 33% 80
2/19/92:.15 102 9 88% 110 6.6 0.07 3.25 1.5 1.75
1 3.6 9 31% 110
2 3.2 9 28% 125
2.3 32 8 27% 130
2125/92:.15 10.7 10 95% 90 3.1 0.01 2.16 <1.0 1.18
1 10.7 10 95% 90
2 10.2 10 90% 100
3 10.2 10 90% 110

DOwnstream: POwar!%7M
D..*/Meters DO Tamp Saturation Cond BOD S000hl Chlor a T-pho. T-nitr TKN NOx
113192:.15 15.4 8 129% 160 1.6 0.1 1.75 < 1.0 0.75
0.5 13.0 8 109% 180
1M/9Z.15 8.9 6 71% 180 <1.0 0.12 <0.06 <1.0 4.06
1 8.9 6 71% 190
t/15/92:.15 8.9 5 70% 178 32 0.17 4.94 3.1 1.84
0.42 8.9 5 70% 180
1/24/92:.15 10.2 7 84% 80 3.7 0.1 1.44 < 1.0 0.44
0.5 10.2 7 84% 85
1/29/92:.15 10.2 8 86% 115 <1.0 0.18 4.61 1.5 4.11
0.47 10.2 7 84% 110
Downs s.m: Oonfk in0s
Dale/MMera DO Temp Saturation Cond BOD S.00hl Moms T•phoo T411tr TKN NOx
1/3192:.15 13.6 7 111% 110 2.5 0.03 1.3 <1.0 0.3
1 11.8 9 102% 110
2 12.6 7 103% 110
3 12.3 7 101% 110
1/0/92 .15 8.6 9 74% 50 2.1 0.15 1.62 <1.0 0.62
1 8.6 9 74% S0
2 8.3 9 72% 50
3 8.3 9 72% 50
4 8.4 9 72% 50
4.5 8.4 9 72% 50
1n5092.15 9.0 8 78% 80 2.1 0.07 621 3.1 1.51
1 8.8 9 78% 80
2 8.7 9 75% 80
3 8.7 9 75% 80
3.5 8.2 9 71% 100
1/24/92:.15 11.4 7 93% 60 2.8 0.11 1.45 <1.0 0.45
1 11.1 7 91% 60
2 11.1 7 91% 60
3 10.8 7 89% 60
3.5 10.7 7 88% 60
1/29192 .t5 9.8 7 80% 85 <1.0 0.07 3.83 2 1.83
1 5.3 6 42% 80
2 4.7 6 38% 90
3 7.6 7 61% 130

DoWgCTRentei
dl
N h H
�r►-
W W LLl
W W W
III
N N VI
000
u1 0 0
e- CV
1- CV Cr
ava
NCVN
CV CC CV
4Q
Q

NPDES WASTE LOAD ALLOCATION
PERMIT NO.: NC0020559
PERMITTEE NAME: City of Henderson
FACILITY NAME: Nutbush Creek WWTP
Facility Status: Existing
Permit Status: Renewal
Major Minor
Pipe No.: 001
Design Capacity: 6.0 MGD
Domestic (% of Flow): 94.5 %
Industrial (% of Flow): 5.5 %
Comments:
Renewal application attached. Flow at 4.14 MGD also.
RECEIVING STREAM: Nutbush Creek
Class: C
Sub -Basin: 03-02-06
Reference USGS Quad: B 25 SW
County: Vance
Regional Office: Raleigh Regional Office
(please attach)
Previous Exp. Date: 8/31/94 Treatment Plant Class:
Classification changes within three miles:
Requested by:
Greg N; izich
Prepared - '' e^,"c
Reviewed by: (2:6 - , �X1�.-0'YI
Class IV
Date: 3/2/94
Date: S /za
Date: J
Modeler
Date Rec.
Drainage Area: 3.8 mi2
Average Streamflow: 3.5 cfs
s7Q10: 0.2 cfs w7Q10: 0.4 cfs
30Q2: 0.5 cfs
Type of Toxicity Test:
Monitoring Schedule:
Chronic (Ceriodaphnia) P / F Test : 90%
March, June, September, and December
Instream Monitoring: refer Fact Sheet attatchment
Wasteflow (MGD):
BOD5 (mg/1):
NH3N (mg/1):
DO (mg/1):
Total Suspended Residue (mg/1):
Fecal Col. (/100 ml):
pH (SU):
Residual Chlorine * (µg/1):
Oil & Grease (mg/1):
TP (mg/1):
TN (mg/1):
* If chlorine is used as a disinfec
Cadmium (µg/1):
Copper (µg/1):
Nickel (1.1g/1):
Lead (µme):
Zinc (µg/1):
Cyanide (µg/1):
Mercury (µg/1):
Silver (µg/1):
MBAS (µg/1):
Fluoride (4/1):
Iron (mg/1):
Summer
Monthly Ave
6.0
5.0 7.5
2.0
6.0 Daily Ave
30 45
200 400
6 - 9 Daily Ave
Weekly Ave
17.0 Daily Max
nr
0.5 Quarterly Ave
monitor
Lion agent
Daily Max.
2.0
monitor
90 N
26.0
monitor
0.012
monitor
511
1,839
monitor
Winter
Monthly Ave Weekly Ave
6.0
10.0 15.0
4.0
6.0 Daily Ave
30 45
200 400
6 - 9 Daily Ave
17.0 Daily Max
nr
0.5 Quarterly Ave
monitor
1b0w 3
tam
3

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 ALLOCATION
Request # 7772
City of Henderson - Nutbush Creek WWTP
NC0020559
Domestic - 94.5 %
Existing
Renewal
Nutbush Creek
C
03-02-06
Vance
Raleigh
Nizich
3/4/94
B25SW
Wasteload Allocation Summary
(approach taken, correspondence with region, EPA, etc.)
Facility unde OC J 2C
Instream data, especially of nutrients, under review for Basin Study
Industrial - 5.5 %
Stream Characteristic:
USGS #
Date:
Drainage Area (mi2):
Summer 7Q10 (cfs):
Winter 7Q10 (cfs):
Average Flow (cfs):
30Q2 (cfs):
IWC (%):
/ c i'r'L(
S7N
Special Schedule Requirements and additi9nal/
Lam• to .9s.'` , Ti/v/- - y /4,7) -�f
17
'74 r/ Y C w,. , J C7 /C
/ / % CYJ c! (C
(tn,.qtc4111 y✓I1,76 7
comments fro
Reviewers: /1
02.0792.6210
1988
3.8
0.2
0.4
3.5
0.5
98 %
ZOC 7i4 76'
-t ��• 7t�i� y 4
�rG r T
41
Recommended by: - Date: za ZFILA Ly11-1
Farrell Keough
Reviewed by
Instream Assessment: (2[AkLk Ak (LeJ Ay Date:
Regional Supervisor:
Permits & Engineering: Date:
`2c- Date:
5//7
RETURN TO TECHNICAL SERVICES BY: MAY 2 ,l 1994
n // et al , 4 tr v< 4
fir X . 000 /%G.r )1 ve • 'O �j or,".t
fi/Z•�.0 •cr S a .l
J
o
GLY7
--AL 4 (.9 / /". "Q js/5
RECEWFr)
APR 2. 6 1994
DEHNR-RAL RO

Existing Limits:
Wasteflow (MGD):
BOD5 (mg/1):
NH3N (mg/1):
DO (mg/1):
Total Suspended Residue (mg/1):
Fecal Col. (/100 ml):
pH (SU):
Residual Chlorin (14/1):
Oil & Grease (m/i):
TP (mg/1):
TN (mg/1):
Recommended Limits:
Wasteflow (MGD):
BOD5 (mg/1):
NH3N (mg/1):
DO (mg/1):
Total Suspended Residue (mg/1):
Fecal Col. (/100 ml):
pH (SU):
70- Residual Chlorin (µg/1):
Oil & Grease (m ):
TP (mg/1):
TN (mg/1):
k(x ,L.5
s�va �t
CONVENTIONAL PARAMETERS
Summer
Monthly Ave Weekly Ave
6.0
5.0 7.5
2.0
6.0 Daily Ave
30 45
200 400
6 - 9 Daily Ave
17.0 Daily Ave
nr
0.5 Quarterly Ave
monitor
Summer
Monthly Ave Weekly Ave
6.0
5.0 7.5
2.0
6.0 Daily Ave
30 , 45
200 400
6 - 9 Daily Ave
17.0 Daily Ave
nr
0.5 Quarterly Ave
monitor
Winter
Monthly Ave
6.0
10.0 15.0
4.0
6.0 Daily Ave
30 45
200 400
6 - 9 Daily Ave
17.0 Daily Ave
nr
0.5 Quarterly Ave
monitor
Weekly Ave
Winter
Monthly Ave Weekly Ave WQ or EL
6.0
10.0 15.0 �Q
4.0 WQ
6.0 Daily Ave WQ
30 45
200 400
6 - 9 Daily Ave
17.0 Daily Ave
nr
0.5 Quarterly Ave WQ
monitor
C y` /
?469 U V C (2_ h't 0.'°- ' f
/h,. /`5 Use
(explanation of any modifications to past modeling analysis including new flows, rates, field data,
interacting discharges)
(See page 4 for miscellaneous and special conditions, if applicable)

TOWS/METALS
Chronic (Ceriodaphnia) P / F Toxicity Test
90 %
90 %
March, June, September, and December
Daily Max.
2.0
51.0
monitor
90.0
26.0
monitor
5.1
0.012
monitor
511
1,839
monitor
monitor
Daily Max.
2.0
nr
�
monitor
'7D.fp10(
26.0
monitor
5.1 r
0.012
monitor
511
1,839
nr
Type of Toxicity Test:
Existing Limit:
Recommended Limit:
Monitoring Schedule:
Existing Limits
Cadmium (4/1):
Chromium (µg/1):
Copper (4/1):
Nickel (4/1):
Lead (µme):
Zinc (µg/1):
Cyanide (4/1):
Mercury (11g/1):
Silver (4/1):
MBAS (4/1):
Fluoride (4/1):
Chloride (µg/1):
Diazinon 0ig/1):
Recommended Limits
Cadmium (4/1):
Chromium (4/1):
Copper (µg/1):
Nickel (µg/1):
Lead (µ0):
Zinc (4/1):
Cyanide (4/1):
Mercury (µ.g/1):
Silver (4/1):
MBAS (4/1):
Fluoride (µg/i):
Chloride (µg/1):
Diazinon (4/1):
Refer attached for limits changes rational
,, do4 e 1241 5 ,, -----
k
y \-)
IsKI',
? g)\''1\1 ,v-
''' /
/ 1"'
c„,,, .,,,,‘,, _ .
.__ -72
WQ
WQ
WQ
WQ
WQ
WQ
WQorEL
x_ Parameter(s) are water quality limited. For some parameters, the available load capacity of
the immediate receiving water will be consumed. This may affect future water quality based
effluent limitations for additional dischargers within this portion of the watershed.
OR
No parameters are water quality limited, but this discharge may affect future allocations.

Arsenic:
Cadmium:
Chromium:
Copper [AL]:
Cyanide:
Lead:
Mercury:
Nickel:
Silver [AL]:
Zinc:
MBAS:
Molybdenum:
iron [AL]:
Dlazlnon:
Chloride [AL]:
Fluoride:
LIMP *previous limits displayed as 4.14 mgd / 6.0 mgd
x monitoring was not required - will receive data from LTMP for next review
x
previous NPDES Permit limits of 2.1 µg/l / 2.0 µg/I
continued recommendation of NPDES Permit limit
previous NPDES Permit limits of 52.0 µg/I / 51.0 µg/I
drop NPDES Permit requirement - data will be obtained from LTMP
previous NPDES Permit requirements of monitor / monitor
per current SOP, monthly NPDES monitoring recommended
previous NPDES Permit requirements of monitor / 5.1 µg/1
1.4 dicta ports
.• 1 • •
previous NPDES Permit limit of 26.0 pg/I [both flows]
continued recommendation of NPDES Permit limit
previous NPDES Permit requirements of not required / 0.012 µg/1
continued recommendation of NPDES Permit limit
previous NPDES Permit limit of 91.0 µg/I / 90.0 µg/I
drop NPDES Permit requirement - data will be obtained from LTMP
previous NPDES Permit requirements of monitor / monitor
per current SOP, monthly NPDES monitoring recommended
previous NPDES Permit requirements of monitor / monitor
per current SOP, monthly NPDES monitoring recommended
previous NPDES Permit requirements of monitor / 511.0 µg/l
continued recommendation of NPDES Permit limit
monitoring was not required - will receive data from LTMP for next review
no previous NPDES Permit requirement
per current SOP, monthly NPDES monitoring recommended
previous NPDES Permit requirements of not required / monitor
drop NPDES Permit requirement
previous NPDES Permit requirements of not required / monitor
drop NPDES Permit requirement
previous NPDES Permit requirements of monitor / 1,839.0 µg/1
continued recommendation of NPDES Permit limit

INSTREAM MONITORING REQUIREMENTS
Upstream Location: refer attached
Downstream Location: refer attached
Parameters: refer attached
Special instream monitoring locations or monitoring frequencies:
MISCELLANEOUS INFORMATION & SPECIAL CONDITIONS
Adequacy of Existing Treatment
Has the facility demonstrates )the ability to meet the proposed new limits with existing treatment
facilities? Yes J
If no, which parameters cannot be met? r erk/
Would a "phasing in" of the new limits be appropriate? Yes No X
If yes, please provide a schedule (and basis for that schedule) with the regional
office recommendations:
If no, why not?
-ev SL7/�' c/`G S /�/.
Special Instructions or Conditions
Wasteload sent to; EPA? (Major) (Y or N)
(If yes, then attach updated evaluation of facility, including toxics spreadsheet, modeling
analysisif modeled at renewal, and description of how it fits into basinwide plan)
Additional Information attached? (Y or N) If yes, explain with attachments.

Facility Name Henderson - Nutbush WWTP Permit # NC0020559 Pipe # 001
CHRONIC TOXICITY PASS/FAIL PERMIT LIMIT (QRTRLY)
The effluent discharge shall at no time exhibit chronic toxicity 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 90 % (defined as treatment two in the North Carolina procedure document). The permit
holder shall perform quarterly monitoring using this procedure to establish compliance with the permit
condition. The first test will be performed after thirty days from the effective date of this permit during the
months of Mar., Jun., Sept., and Dec. 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
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 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
Permitted Flow
IWC
Basin & Sub -basin
Receiving Stream
County
0.2 cfs
6.0 MG D
98 %
03-02-06
Nutbush Creek
Vance
QCL P/F Version 9/91
Recommended by_.
Farrell Keough
Date to Are.tui Mcv9

Instream Monitoring Requirements:
Henderson - Nutbush Creek WWTP NC0020559
Sample Locations:
U:
D1:
D2:
NC39
at power lines
immediately above the confluence of Indian and Crooked Creeks
Summer (April - October)
Parameter
Dissolved Oxygen
pH
Temperature
Fecal Coliform
Conductivity
Secchi Depth
Chlorophyll - a
Total Phosphorus
NH3 - N
TKN
NO2 - NO3
Frequency / Type Location
weekly / grab U, D1, D2
monthly / profile D1, D2
weekly / grab
monthly / profile
weekly / grab
monthly / profile
weekly / grab
weekly / grab
monthly / composite
monthly / composite
monthly / composite
monthly / composite
monthly / composite
monthly / composite
U, D1, D2
D1, D2
U, D1, D2
D1, D2
U, D1, D2
U, D1, D2
D1, D2
01, D2
D1, D2
D1, D2
D1, D2
D1, D2
Winter (November - March)
Parameter Frequency / Type Location
Dissolved Oxygen weekly / grab U, D1, D2
pH weekly / grab U, D1, D2
Temperature weekly / grab U, D1, D2
Fecal Coliform weekly / grab U, D1, D2
Conductivity weekly / grab U, D1, D2
• Profiles should be taken at 1 meter intervals
• Composites should be taken with a lab line in the photic zone, (i.e. two times the secchi depth)
• Samples should be taken mid - morning. Rainfall data shall be reported for the seven consecutive
days prior to the day of sampling.

Henderson - Nutbush Creek Waste Water Treatment Plant NC0020559
Upstream: 0.5 miles above plant @ bridge
Date DO Temp Saturation ROD Fecal Conductivity
Mar-94 10.3 9 89% 0.6 280 76
Feb-94 11 7 90% 1.3 339 81
Jan-94 12.5 4 95% 1.1 212 82
Deo-93 12.4 5 97% 0.5 91 82
Nov-93 11 7 90% 0.6 107 82
Oct 93 8.9 13 85% 0.6 211 75
Sep-93 7.9 19 85% 0.6 386 83
Aug-93 7.2 21 81% 0.5 385 85
Jul-93 7.5 21 84% 0.4 441 79.4
Jun-93 8.2 18 87% 0.5 478 77.5
May-93 9 17 93% 0.5 235 74.2
Apr-93 10.1 11 92% 1.3 245 70.7
Mar-93 11.2 8 94% 0.3 117 70.5
Feb-93 11.3 5 88% 0.4 145 73.6
Jan-93 10.7 7 88% 0.4 135 72.5
Dec-92 10.7 6 86% 0.3 156
Nov-92 9.7 9 84% 0.5 234
Oct 92 9 13 85% 0.9 344
Sep-92 7.6 18 80% 0.8 1,000
Aug-92 7.4 19 80% 0.9 711
Jul-92 7.8 20 86% 0.8 1,084
Jun-92 9.1 15 90% 0.7 853
May-92 9.7 13 92% 0.8 743
Apr 92 10.3 10 91% 0.7 449
Mar-92 11.7 8 98% 0.4 242
Feb-92 12 5 94% 0.9 89
Jan-92 11.6 4 88% 0.9 131
Dec-91 12.3 5 96% 0.6 258
Nov-91 10.5 8 88% 0.6 180
Oct-91 9.5 12 88% 0.5 183
Sep-91 7.6 18 80% 0.5 391
Aug-91 7.6 19 82% 0.6 732
Jul-91 7.3 20 80% 0.7 756
Jun-91 7.6 18 80% 0.5 723
May-91 8.5 16 86% 0.5 1,075
Apr 91 9.6 12 89% 0.85 420
Mar-91 12.5 8 105% 0.7 464
Feb-91 12 7 98% 1.2 421
Jan-91 11.8 7 97% 0.7 213
Downstream: 0.5 miles below plant @ bridge
DO Temp Saturation BOD Focal Conductivity
10.4 9 90% 1 637 132
10.9 8 92% 1.8 301 148
12.2 5 95% 2.3 251 158
12.1 6 97% 0.5 18 170
11.2 9 97% 1 106 196
9.3 13 88% 0.65 187 171
8.2 19 88% 0.6 405 175
7.7 20 85% 0.8 258 172
7.6 21 85% 0.5 374 157.5
8.4 18 89% 0.5 441 139.8
9.2 15 91% 0.6 228 114.7
10.1 11 92% 1.7 295 107.3
11.4 8 96% 0.8 160 110.1
11.5 5 90% 0.4 156 126.1
10.9 7 89% 1.2 165 121.6
10.9 6 87% 197
10.1 9 87% 1.3 339
9.2 13 87% 0.9 342
7.7 17 80% 0.8 1,064
7.4 19 80% 0.9 813
7.5 20 83% 1.2 1,087
9.1 15 90% 0.9 973
9.8 13 93% 0.9 680
10.2 10 90% 0.6 649
11.9 8 100% 0.3 114
12.2 5 95% 1.2 129
11.9 4 91% 0.8 80
12.4 5 97% 0.9 200
10.6 9 91% 1.1 159
9.5 13 90% 0.5 137
8 18 85% 0.5 273
7.8 20 86% 0.6 649
7.7 21 86% 0.7 682
7.9 18 84% 0.6 739
8.5 17 88% 0.7 1,008
9.6 12 89% 0.65 407
12.2 8 103% 4.4 453
11.7 7 96% 1.4 487
11.5 8 97% 0.6 243
5120/94

%ggli:E2)1),
CITY OF HENDERSON DEC 29 1993
NORTII CAROLINA ' OF ENVIRONMENTK
DIRECTORS OFFICE
OFFICE OF
PUBLIC UTILITIES
iLbA 66
December 23, 1993
Mr. Preston J. Howard, Director
NC DEHNR
P. 0. Box 29535
Raleigh, NC 27626-0535
ARE:
�.
(Dear Mr. Howard,
c
cAs required by the City of Henderson's Consent Judgement in
`eference the Nutbush WWTP, I am giving notice that the City of
Henderson has started the long term monitoring program to comply
with the December 15, 1993 deadline in the order.
1» I'T.
City of Henderson
Nutbush Creek WWTP
NPDES NO. NC 0020559
JOC #88-04
An effluent sample was collected and divided among two contract
labs and the state lab during the week of December 6, 1993.
Additional industrial and in -plant monitoring will be scheduled as
soon as the City verifies that our long term monitoring program is
acceptable and meets the requirements of both the pretreatment and
aquatic toxicology sections of the DEM.
I extend my thanks to you and your staff who have been very helpful
in providing assistance to resolve our wastewater treatment
problems.
Sincerely,
yf c err i c J /h 4o a�-►--)
Thomas M. Spain,
Director WWTP
City of Henderson
P. O. Box 1434
Henderson, NC 27536
919 492-6167
10
r7
1 CrIzzt-
Po
a n� r
-s. rr
e

03/31/1994 16:11 919-492-3324
CITYOFHEND AAJTP
PAGE 01
?49-
I� ltgrr:
Il.til�l::
c :.� •.I' :Y' 01. . 11!: N 1)11; i0; (.) N
N{)rt•t'it ;Afr(,r•,>'NA
NUTI11MSr1
WAS?Tt WATER TREATMENT PLANT
Ni)lrIiI:R r)f" ;itEET5 TRAli' MIT O):
(i►rgltttlhy; (,httti::mjt,I,:,I ::lrt:r:I
rnx arl.r ...a �.�!►i�.-4.W:�3��
%l
REM i)
• 1994
FACILITIES tSSESSiriEN)T .....'
Yo
u din nirl, t•r:r;r;iur; tJtr:
�I�rrnl,I Itlrr.:�1) p,,, a1. t'nrr,;r:C uuuth,:r ref ;au:r.( r,i:rn>niil,rrl, (I• Ita r: :nry
Iit:nll,tI•::ntt r',1R tnu.ht.r. .I n�• r ..Qgr1 1,1��1....,...... t t
i ,r :. •rrvr;, tor tt-r Lim t'II.y or
Alm, 6 734 Al6 7 ' ��.e r�d� /"9
.Sam. e a. 7 er MG7-4 4 A'e .7"v G "Arc -ear
elc. 'Q/ e Tc rr c 47' hee wc.e. ch72 e iew /ewer.
4/1 eF %'tJj CL/A 7A Aire/ ce r,� .t`.�.t�-► .7 ,1904tvvr Arm
Afi,t....-e ),/ 7-0 e ("3-07 c c4dit, fr)
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r•t,. rtt>X rt.tt. rtr-.rihritviui >t ....-. -

03/31/1994 16:11 919-492-3324 CITYOFHENDWWTP PAGE 02
•
Annual Pollutant Analysis Monitoring Requirement
Reporting Form A
(Revised June 1990)
I. Facility Information:
NPDES Permit No:.II02255,9 __ ._ Discharge (Pipe) No: .- 00 1 Year: 1994
Facility Name: sue Wastewater Class: County: Vance
Persons) Collecting Samples:.,..,.. ar y oft ---
Status of facility wastewater treatment operation on day of sampling: typical: Yes No
if no, explain briefly: - --
Analytical Laboratory:. BB TECHN I CAj GRO Work Order #9402330. �... _
Page 1 019
II. Sampling:
24 hr composite for main sample 1 grab sample for purgeable fraction
Date Sampled: (composite sample) Corresponding sample taken for toxicity testing:
Sampling begun (date, time):JJ7/94, 9s30 ANi_ _ _ Yes
Sampling finished (date, time)•_=2-44-213a-AM No
Date and time sampled (grab sample): 2L$J94,
instructions
The purpose of this document and the accompanying memo is to standardize the sampling. analysis and reporting procedures to be used
for the Annual Pollutant Analysis Monitoring (APAM) Requirement as described in the permit.
Sampling
i - Take a 24-hour composite sample from the final effluent during mid -week (Wednesday through Friday). Collect a grab sample for the volatile
attic fraction when collection of the 24hour composite sample is completed. Fellow any other sampling instructions provided by the laboratory
rionning the scaly:ls.
2 • Indicate in the space provided at the lop of this page whether a corresponding sample for toxicity testing was taken.
3 • Make note of any unusual wastewater treatment operating conditions occurring on the day of sampling in the space provided on the form.
Analysts
4 - Analyze the effluent for pollutants listed on the APAM form, including those to be identified and approximately quantified under the 10
significant peaks rule, using appropriate EPA•approved methods for each of the analytic fractions. Other analytical methods can be Subatftuled
only with prior. written approval of the Director of the Division of Environmental Management (DEM). Read and distribute to the laboratory
performing the analysis the accompanying memo (Tedder, October 1990) Clarifying analytical requirements.
5 • Identify chemicals to be analyzed for according to the 10 significant peaks rule (as described In item 2 of the Annual Pollutant Analysis
Monitoring Requirement in the permit) using a GCIMS library search. Tentative identification is all that is required: confirmation by standard
injection is not necessary. Estimate the concentration of each based on an internal standard having the closest retention time.
Reporting
8 - Quantilation limit Targets that should be met are listed on this Revised APAM Reporting form A. Report the use of arty higher quanlile-
lion limit and an explanation as to why the listed quantitation limit target Could not be met. Examples of acceptable reasons for not meeting
a quantitatton limit target could be high background concentrations in a sample. or the necessity for simple fraction dilution to bring a chemical
to within a quantifiable concentration. List any quantization limit differtent (whether higher or lower) from the target In the column provided
for this purpose.
7 • if a chemical is found to be below the quanlitation limit. report the concentration detected as less then (or ,•C ) the quantitatlon limit
in the appropriate space. Provide a concentration estimate for chemicals detected In concentrations greater than the detection limit and less
than the quantitatlon limit. Enter the detection limit in parentheses beside the estimate. Chemicals detected In concentrations above the quan•
tttatton limits must be quantified. Ouanlltallon limit and detection limit are defined In the accompanying memo (Tedder, October 1990). Enter
the total number of peaks detected in each analytic fraction In the appropriate space on this Revised AFAM Form A. Report *it concentrations
In units of micrograms pert liter (ug/1) end metals as total recoverable metal. If no peaks to be identified under the 10 significant peaks rule
are observed. enter "none"l in the space provided for "other` -compounds In each appropriate analytic fraction section. Provide the concentra-
tion estimate and retention time for "unknowns" as well as for "significant peaks" for which a structural assignment can be made.
$ - if "significant peaks" are found, provide probable molecular weight. library match probability, retention time. Identification basis, and
MS scan number for each. In addition, list Internal standards and their retention limes.
• in the section labeled "Organic Analytical tnformatlon" (p. 9). Include for each organic fraction the method, extraction technique. GC
•,rating conditions, and surrogate recovery. Report the size of the GCIMS library being utilized In the appropriate space.
10 • Use copies of this Annual Pullutani Andlyals MLA rituriny Rcvlse d NMI A to 'spud the •asult3 of the a,taf gala. Bath tt•e arslyiksl let,oratery
representative and the facility operator In responsible charge should sign completed forms past page).
11 - Mail two completed copies of the form land the laboratory report, if submitted to the facility on a different form) to: ATTN: Central Files,
Division of Err tronmental Management. NC DEHNfi, P.O. Sox 2768?, Raleigh. NC 27611. Mail the APAM form separately from Discharge Monitoring
Reports.

03/31/1994 16:11 919-492-3324 CITYOFHENDWWTP
L
PACE 03
PO
A. Purgeable (Volatile
Number of chemicals
Fraction STORET
Organic) Fraction,
detected In Fraction
Number 84085
EPA Method
624
page 2 of 9
- _.-
STORET
Number
I Compound
ouantitatlon
Limit Target
Quentitation
Limit'
Concentration
Detected
GC/MS
Confirmation?
1. Pollutants to be analyzed for.
(ugfl)
(ug/1)
(ug11)
Yes
No •
<OLT
X
34215
Acrylonitnie
100
---
<QLT
X
34030
Benzene
g
�—
<QLT
X
32101
8rornodichloromethane
5
^
<QLt
g
32104
` Bromoform
5
<ILL_'
X
34413
_
Bromomethane
10
<QLT_
X
32102
Carbon tetrachloride
5
<OLT
- X
34301
Chlorobenzene
_
8
__
-- -_ <QLT
X
34311
Chloroethane
10
t0LT
X
34578
2-ChiorOethyl vinyl ether
10 _
32106
Chloroform
5
<QLT
X
34418
Chlorornethane
10
<OLT
X
32106
Dibromochloromethano
5'
<QLT
X
34496
1.Dichioroeth
5
<QLT.,
K
• 34531
1,2•Dichioroethane
5
<9LT
X
34501
1,1-Di hioroethylene
5
_
<QLT
X
34546
trans-1,2.Oichloroethylene
5
<OLT
X
_
34541
1,2-Dlchioropropane
_
6
_
< LT
X
34704
cis 1,3-Dich oropropene
_
5
<OLT
34699
trans 1,3-Dichioropropene_
- 5
_
<QLT
X
34371
Ethyibehzene
8
< LT
X
34423
Methylene chloride
5
<QLi
X
_ 34516
1 ,1,2,2-lletrac hioroa hane
7
<QLT
X
34475
Tetrach(oroethylene
Tluene'
-- 5
<OLT
X
34010
4---
_
<QLT
X
34506
1,1,1-Trichlor
1,1,2•Trlchioroethane
tev hane
5
<QLT
X
_34511
5
-
<QLT
39180
Trichlor�lene
5
<QLT
X
34488 T
Trichiorotluramethane
Vinyl chloride
10
<QLT
X
`__ 39175
10
__ _
<QLT
-
X
• if different from quaniitation limit target

Compound
Probable
Molecular
Weight
Estimated ;
Concentration
(ugrl}
Library Match
Probability
(%)
Retention
Time (RT)
(Min)
identification Basis
(Check a!I that apply)
Scan
Number
Library
March
-
Manual I
interpretation .
RT
None
`rr
I
_
r
.
1
s
A
;
1
Complete only if non -targeted compounds are present:
Internal Standard
Retention
Time
(Aiin)
2. Other purgesbtes (up to 10 highest peaks)
0661/ZE/E0
t'ZEE-Z617-616
m
0

03/31/1994 16:11 919-492-3324
CITYOFHENDWWTP PAGE 05
B. Acid Extractable Fraction, EPA Method 625
Number of chemicals detected In Fraction Q
Fraction STORET Number 45682
Page 4 of 9
STOHET Compound
Number
Ouantitatlon
Limit Target
Quentltatlon
Limit'
Concentration
Detected
GC/MS
Confirmation?
1. Pollutants to be analyzed for:
(u911)
(u911)
(ugl1)
Yes
N
No
34556
4-Chtoro•3•methylphenof
10
20
<2
X
___-
2-Chiorophenol
10
<QLT _
"
X
34601 -
- 2.4•DIchlorophenol
10
- -
<OLT
-
X
_,• 06
_
2,4•Dlmethytphenol
_
10
QLT
<0 T -
-
X
34616
2,4•Dinitrgphenol
- 54_
X
34657
2•Methy14,641n1trophenol
50
<QLT
_34591
2•Nltrophenot
_ 10
<QLT
<QLT
��_ -
_X _
X ,
X
34646
.4-Nltrophenot
50
_
39032
Pentachtarophenoi
60
<QLT
Y.
34694
Phenol - `
10 -
<QLT
X .
. _
3 621
2,4;6•Tdchiorophenai
10
<QLT
__
It different from quantiitatton limit target

Compound
Probable
Molecular
Weight
Estimated
Concentration
(ug11)
Library Match
Probability
(%)
Retention
Time (FIT)
(Mir)
identification Basis
(Check all that apply)_
AT ,
i
Scan
Number
Library
Match
Manual
Interpretation
, None
I
F
f
i
J
S
1
Complete only If non targeted compounds are present:
internal Standard
Retention
Time
(Min)
0
tw
0
m
PZ66-Z60-6t6
c)
H
m

03(31/1994 16:11 919-492-3324 CITYOFHENL*MTP
PACE 07
MMINb
Number of chemicals detected In Fraction
Fraction STORET Number 45583
1
•
STORET
Number
Compound
Quantitatlon
Limit Target
••
Quentitatlon
Limit•
Concentration
Detected
-
GC/MS
Confirmation?
A
Ate- -
1. Pollutants to be analyzed tor.
!r
(ugh)
(ug/1)
(ugll)
Yes
—�
No
3405
Acenaohthene
10
50
34200
Acenaphthyene
10
- 50
<( LT
X
34220
Anthracene
_
10
50
<QLT
X
39120
Benzidine
50
250
_ <OLT
X
34526
Benzo (a) anthraceno
- 10
50
<0L1.
_ X
34247
___....
Benzo (a) pyrene
10
50
<QLT_
_X
34230
_
Benz°jb) fiuoranthene
10
- - sn
<QLT _
X
_
34521
Benzo I(Ohi) perylene
10
30
<0LT
X
34242
Benzo !(k) iluoranthene
10
50
< LT
X
34278
Bis(2•chloroethoxy) methane
10
50
< LT
X
•-_
34273
Bis(2-chloroethy ether
._ 10 _r,_,,�
50
<QLT
X _
34283
Bis�2-chlorolsoprop i ether
10
<QQLT
39100
Bls(2•ethylhexyl) phthalate
10
_
5•
__•, 34836
4-Bromiophenyl phenyl ether
. 10
5n
<qi T
34292
But I ben I • hthalate
10
50
QLT
X
34581
2_Chloronaphthalene
10
50 _
<QLT
_ _ X -L-
__
34641 1 4-Chlorophenyl phenyl ether
10
50
<QLT
W-.�4v
‘01“7013110
it,
J..
34550
Dibenzo (a,h) anthracone
10
50
-
COLT
X
34536
1,2-Dlchlorobenzene
10
5n
<QLT
X
r 345E
1,3-Dichiorobenz ne _
10
S0
«LT
X
5
1,4-Dlchlorobenzene
10
50
_
MT_
X
34631
3,3-Dichlorobenzl_e
20
100
<QLT
X
34336
Diethyl phthalate
10 .rSO
<QLT
X
34341 _,
Olmethyl phthalates
10
-- -
< L
X
.__ 39110 _
01-n-butyl phthalate
10
__ -50. _
irk
SQL<Qt.A=M
-
X
34611
, 20•Dinitrotoluene
10
_
50
<ly
X
-_
r,,.3�4826
2�6•Dinitrotoluene
10
50
,T
< L
X
34596
Di-n•octyl phthalate
10
50
<QLT
X
34346
1.2-Diphenylhydrazina
i0 _
250
_
<256
_
X
34376 t Fluoranthene
- 10 _
10
50
50
<QLT
x
34381
-
FIuorene
<OLT
X
39700 _
.__Hexachlorobenzene
10
50
<QLT
X
34381
_
Hexachiorobutadione
10
<QLT
X
T 34386
Hexachiorocyclopentadlene
10
__ _50
-----in
- _ in
<OLT
X
,. 34398
Hexachioroeth__
10
�o
<QLT
X
34403
Indeno{1,213-cd) pvrene
10
_
10
<QLT
X--- ---
��
34408
Isophorone _
- 10
50
<OLT
34698
Naphthalene .-
10
50
< LT
X
34447
_Nitrobenzene
- 10
50
<QLT
34438
N-nitrosodimethvktrnhu
qn
- -� '—
,At .
..
34428
34433
N •nf tro'so-di-n-propylamine
N-nitrosodlphenviamine
34461
� 344E9
Phenanthrene
Pyrene
34551 1.2.4-Trichlorobenzene
If different from quantitatton target
10
10
sn
50
10
10
50
50
<qLT
<QLT
<QLT
<OLT
10 50 <QLT

TIdentification
Compound
Probable
Molecular
Weight
Estimated
Concentration
(ugh)
Library Match
Probability
(%) `
Retention
Time (RT)
(Min)
Basis
(Check all that apply)
Scan
Number
-
Library
Match
Manual
Interpretation
RT
Molecular sulfur --
256
-- * -
--95 -
- 23.16
-- X
1195
_
.
l
II
i�
I
I
•
5
•
I
I
1
I
1
r
*Large peak; estimated concentration 2-4 ppm.
Complete only if non-tergetad compounds are present
Internal Standard
i
Retention
Time
(Min)
Naphthalene - d8
12.55
2. Other bass/neutrals (up to 10 highest peaks)
066t/IE/60
m
IZEE-3617-6T6
H

69/31/1994 16:17 919-492-3324
CITYOFHENDWWTP PAGE 01
w •••
D, Organochtorine/0rganophosphorus Pesticides and PCB's
Number of chemicals detected in Fraction , 0 _
Fraction STORET Number 00188
Page 8 o! 9
STORET Compound
Number
Quantitation
Limit Target
Ouantitation
Limit'
Concentration
Detected
Confirmation?
Dual Column
GCIMS
1. Pollutants to be analyzed for (ugl1)
Organochiorino Pesticides/PCB's: EPA Method figi
(ugll)
(ugt1)
Yes
No
Yes
-
No
39330
, Aldan
1 0.05
< i
39337
al • ha=BHC
0.05
< 1 LT
M
X
39338
Beta•BHC •
0.05
,
34259
Delta-BHC
0.1
<+
.
39340
Gamma•BHC (Lindane)
0.05
<: LT
ME
X
39350
Chlordane
O.2
< LT -
.
x
_
39310
_..---__T-�
4 4'•OOD
0.1
<QLT
M1
X
39320
4,4'.DOE
0.1
<QLT
-,.�
39300
4,4'•DDT
0.1
_
<QLT
ill
X
39380
Oletdrin
0.02
- - -
<QL
.
34361
Endosullan l (alpha)
O.t
_ _
-
<VLTMil
,
34356
t:ndosulfan II (beta) _ _
0.1
<QL
.
34351
Endosuifan sulfate
0.7
<I LT
X
39390
Endrin
0.06
41 LT -
11111111
X
• 34366
Endrin aldehyde
0.2
<OLT
Mill
X
t 10
He.tachior
0.05
<1LY
_
X ,
39420
He • tachior e • • xide
0.8
< 1 _ T
39480
Methoxychlor
0.5
<OLT
MNX
,
39755
Mirex T --
0.2
<QLT
39400
Toxa . hene
2.4
<QLT _ -
X
34671 _
PCB 1016
0.5
<s LT
X
39488
, PC8 1221 --
0.5
<QLT
111111
X
39492
PCB 1232
0.5
< LT ___- _
X
39496
PCB 1242.
0.5
_
_
<QLT
_ -
X
39 0 "
_ _
PCB 1248
0.5
<QLT
X 1
39504
PCB 1254
1.0
COLT
X
39508
PCB 1260
1.0
- - _<OLT
Organophosphorus Pesticides: EPA Method
814Q
_
—
39560
Demeton
2.5
39540
Parathion (ethyl)
o.s
- COLT
X
s
Dtaxinon added to analysis: <0.5 pg/L
E. Herbicides, EPA Method .) 50
Number of chemicals detected In Fraction _ 0
Fraction STORET Number 00148
STORET
Number
Compound
Quantitation
Limit Target
Pollutants to be analyzed for.
397'30
2,4—D
39045 Sliyex
39740 2,4,5•T
(ugl1)
i2
Quantitation
Limit'
Concentration
Detected
Confirmation?
Dual Column
(ugll)
Mgt)
Yes
No
• If different from quantitation limit target
<OLT
<QLT
<QLT

C3/31/1994 16:17 919-492-3324
C I TYOFHENDW WTP
FAi E 02
i----Organic Analytical Information: W vPa9e 9 or 9
rganic fraction
Purgoable
Add Extractable
Base/Neutral Extractable
Example; Add Extractable
Method
624
Extraction
Batch
625
625
Continuous
GC Operating Conditions
Column Description
Length X IC), Film Thickness,
Column Type, Carrier Gas & Flow
Rate, Temperature Program
75 m x 0.53 mm, 3.0 pm
08-624, He, 8 ml/min. Toluene -dB
� I lJ()-
10°Cj1 miri),180°C,6°C/mir4M re
Surrogates (Spikes)
Compound
P IIIN}ry
30 m x 0.25 mm 0.25 m 2-Flux
pB-5 ms, He, 1 /min. Phen01-d5
35°C
(same as Acid)
4 min),260°C,10°C/mi1
625
GCIMS Library Size (number of reference spectra): 54 , 000
30m K 0.25mm, 0.25urn, OB•5,
He, 30 cm/sec, 409C (4 min) •
270'C, 108lmin
lerphenyl-d14
d6 • phenol
Recovery
82
50
F. Metals and Other Chemicals
Number of Metals and Other Chemicals (as listed below) detected in Sample
Fraction STORET Number 78240
STORET Compound
Number
1. Pollutants to be analyzed for:
Quantitation
Limit Target
Quantitation
Limit'
(ug11)
(ugh )
Concentration
Detected
(ugll)
01104
01097
01002
Aluminum
Antimon
Arsenic
y
50
50
10
01012
01027
01034
01042
01051
BerylIIum
Cadmium
Chromium
Copper
Lead
25
2
5
2
10
5
10
10
50
<QLT
LT
LT3
<QL
«
<Q
71900
01067
01147
01077
Mercury
Nickel
Selenium
Silver
0.2
10
5
5
20
10
<10
<50
<QLT
<20
(<QLT2
<10
01092
Zinc
2, Other Inorganics;
01007
00940
00720
00951
Barium
Chloride
Cyanide
Fluoride
10
33
500
1000
20
100
<QLT
442_Q0
<QLT
880
• It different from quantitation limit target
#Molybdenum added to analysis: 7 pg/L
Ilytical Laboratory Representative: erbert E.. Kaulfuss
Signed;
Facility Operator In Responsible Charg RC): %uX2',n / • -� •ta'�✓
I certify that this report is accurate and complete to the best of my knowledge.
Signed'
Date!
3/9/94
Date: ,."�

ea/31/1994 16:17 919-492-3324
CITYOFHENDWWTP PANE 03
RE: N. C. Annual Pollutant Analysis Concerning Some Chemicals
and Metals Having Quantitation Limit Higher Than Quantita-
tion Limit Target
In B. Acid Extractable Fraction
"4-Chloro-3-methylphenol" is subject to erratic chromato-
graphic behavior. The quantitation limit outlined in EPA
Method 8270 is used.
In C. Base/Neutral Fraction
"1;2-Diphenyl hydrazine" is subject to decomposition in
the chromatographic inlet; therefore, it frequently exhib-
its poor chromatography. A higher quantitation limit is
used for this compound.
In F.
Metals and Other Chemicals
Due, to matrix inte
rferences �. erferences and subsequent instrumental
limitations, the quantitation limits for selected metals
are higher than the quantitation limit targets.

SOC PRIORITY PROJECT: Yes No
If Yes, SOC No.
To: Permits and Engineering Unit
Water Quality Section
Attention: (Greg Nizich)
Date March 24, 1994
NPDES STAFF REPORT AND RECOMMENDATION
County Vance
Permit No. 0020559
PART I - GENERAL INFORMATION
1. Facility and Address:
Eric Williams
City of Henderson
P. 0. Box 1434
Henderson, NC 27536
RFr ,-T
APR R ,c
2. Date of Investigation: March 24, 1994
3. Report Prepared by: Danny Smith
4. Persons Contacted and Telephone Number:
Tom Spain [phone]
5. Directions to Site: I-85 North to Henderson, exit onto Hwy.
39 is 0.5 rd. mi. on rt. at bottom of hill.
6. Discharge Point(s), List for all discharge points:
Latitude: 36°21'O1" Longitude:78°24'38"
Attach a USGS map extract and indicate treatment facility
site and discharge point on map.
U.S.G.S. Quad No. B25SW U.S.G.S. Quad Name Henderson
7. Site size and expansion area consistent with application ?
XX Yes No If No, explain:
8. Topography (relationship to flood plain included):
Plant in flood plain
9. Location of nearest dwelling: none with in 300 feet.
10. Receiving stream or affected surface waters:
Nutbush Creek, Kerr Lake, Roanoke River Basin
Index No. 23-8-(1)
a. Classification: C
b. River Basin and Subbasin No.: 03 02 06

SOC PRIORITY PROJECT: Yes No
If Yes, SOC No.
4
PART II
c. Describe receiving stream features and pertinent
downstream uses: wastewater flows from Nutbush
Cr. into Kerr Lake
- DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1. a. Volume of Wastewater to be permitted: 4.14
MGD(Ultimate Design Capacity)
What is the current permitted capacity of the Waste
Water Treatment facility? 4.14 mgd
c. Actual treatment capacity of the
(current design capacity)? 4.14mgd
d. Date(s) and construction activities allowed by previous
Authorization to Construct issued in the previous two years:
N\A
e. Please provide a description of existing or
substantially constructed wastewater treatment facilities:
Influent: manual bar screen, mechanical grit removal, second bar
screen, comminutor (not in operation), parshall flume and
influent flow meter, primary clarifiers (6), trickling filters
(4) = pairs of filters in series, "secondary" clarifiers, (note:.
facility has capability to bypass the rest of the plant at this
stage and go directly to chlorinator), lime tank and feed, pure
oxygen ;tank, pure oxygen/aeration basin, .final clarifiers (4)
=(theses can work as pairs of filters in series, or individual
pending on flow demands), tertiary filters (4), C12 disinfection
Chlorine contact chamber (dual), post aeration, effluent
flowmeter and discharge pipe.
Sludge: sludge thickening basin (aeration basin), DAF unit,
dual stage heated digester (anaerobic), sludge holding tank with
withdrawal .pipe for truck loading, drying beds (note: currently
only used for grit and grease/scum drying)
Current JOC:
Completion Facility Additions
Status:
close........
close.. . ..
in process....
during inspect
close
close
current facility
- Automatic bar screen cleaner
- conveyors and dumpster for automatic bar screen
and grit removal
- expansion of laboratory - to include metal
analyses
- addition of larger stilling wells and 4
flocculators to each of two final clarifiers
- addition of Alum feed system for phosphorus

SOC PRIORITY PROJECT: Yes No.
If Yes, SOC No.
7 weeks', behind
close
complete
removal
-addition of caustic (NaOH) feed system
- replacement of tertiary filter controls and
filter media (all 4 filters)
-addition of ultraviolet disinfection sys. Note:
C12 will remain for emergency situations
-new 1,000,000 gallon aerobic digester (for
processing Alum sludge - has been completed;
however, aerator broke two days after start up -
aerator under warranty -to be fixed
- construction of overhead fill system to load
sludge going to land application
- added 75 Hp mixer and extended withdrawal pipe on
existing 1,000,000 sludge storage tank.
f. Please provide a description of proposed wastewater
treatment facilities:
NA
g. Possible toxic impacts to surface waters: Ammonia,
chlorine, and metals(for both effluent and sludge) are
the likely toxicity concerns for this facility.
h. Pretreatment Program (POTWs only):
in development approved XX
should be required not needed
2. Residuals handling and utilization/disposal scheme:
a. If residuals are being land applied, please specify DEM
Permit No. WQ0000838
b.
Residual Contractor Granville Farms, Inc.
8506 B Hwy 96
Oxford NC 27565
Telephone No. [phone]
Residuals stabilization: LPSRP�
PFRP Other
c. Landfill: bar screen and grit removal
d. Other disposal/utilization scheme (Specify):
3. Treatment plant classification (attach completed rating
sheet): IV
4. SIC Code(s): 4952

SOC PRIORITY PROJECT: Yes No
If Yes, SOC No.
Wastewater Code(s) of actual wastewater, not particular
facilities i.e.., non -contact cooling water discharge from a
metal plating company would be 14, not 56.
Primary 01 Secondary _
Main Treatment Unit Code: 1 4 1 - 3
PART III - OTHER PERTINENT INFORMATION
1. Is this facility being constructed with Construction Grant
Funds or are any public monies involved. (municipals only)?
Yes
2. Special monitoring or limitations (including toxicity)
requests: YES, as per JOC (#88-04-AD II) conduct industrial
waste survey, require industry to perform a priority pollutant
scan, submit a toxicity reduction plan (in order to pass
toxicity), long-term monitoring plan for pollutants of concern,
headworks analysis,
3. Important SOC, JOC or Compliance Schedule dates: (Please
indicate) = JOC
Date
Submission of Plans and Specifications April 15, 1992
Begin Construction May 31, 1993
Complete Construction April 15, 1994
Note: as per date of the inspection the facility has asked for an
Ninety day extension to Order
4. Alternative Analysis Evaluation: Has the facility evaluated
all of the non -discharge options available. Please provide
regional perspective for each option evaluated.
Spray Irrigation: not applicable
Connection to Regional Sewer System: not applicable
Subsurface: not applicable
Other disposal options:
5. Other Special Items:
PART IV - EVALUATION AND RECOMMENDATIONS
The weirs of all of the clarifiers were observed to have
some build-up of algae, there was some grease, floating trash,
and copious amounts of Lemna spp. observed in the Cl2 contact
chamber. Also, the trickling filters were observed to have
plastics mixed throughout the media, and the effluent was free
from visible solids.
This facility is under a JOC(#88-04-AD II). In a letter
dated March 22, 1994, Henderson has asked for a 90-day extension
of two deadlines contained in the JOC Amendment II. The

• SOC PRIORITY PROJECT: Yes No
If Yes, SOC No.
extension requests are for items #9 and #10 contained in section
#2 (amending paragraph 9 (b) on page #2 of the JOC). These items
require completion of construction improvements on or before
April 15, 1994 and compliance with the final effluent
limitations, except chronic toxicity, on or before July 15, 1994.
The Raleigh Regiona Offi e recommends renewal of NPDES
Permit No. NC 0020559.
Signature o r-port prepar
Water Quality Re gi n al Supervisor
d7e-/
Dane

Name of Facility: /14'
Owner or Contact Person:
Mailing Address: P
County:
• Present Classification:�-
•NPDES Per. No. NC00 2D
Rated by:
Reviewed by: Health Dept.
Regional Office
Central Off cL e
ORC: fe5-7-r7
Grade: l
Check Classifica lon(s}: Subsurface Spray lrriga
Wastewater Classification: (Circle One) I II • IIi
•
RATING SCALE • FOR CLASSIFICAT ON OF W ER POLLUTION CONTROL SYSTEMS
- e. e - 1 i /,I / 7 7 '
vs
Telephone:(/V - ‘617
New Facility Existing Facility A--
-3<
ondisc. Per. No.WQ Health Dept.Per No.
Telephone: 577/-41C2 Date: 3oz- '?
Telephone:
Telephone:
Telephone:
Telephone: 449 2 -en- 5-
Land Application
Total Points:
. I
di°
IN -PLANT PROCESSES AND REL6JED CC NTROL EQUIPMFM i PAW' OF INDLGIBIALFSODILTION SHALL NOT RE
CONSIDERED WASTE TREATMENT FOR THE PURPOSE OF CLSSIFiCAT10M ALSO SEPTIC T kNK SYSTEMS CONSISTING ONLY OF SEPTIC TAM(
AND GRAyrTY NrTRIFICATION LINES ARE EXEMPT FROM CLASSIFICATION.
SUBSURFACE CLASSIFICATION
(check all units that apply)
i._septic tanks
2. pump tanks
3. siphon or pump -dosing systems
4.,
5.,
6.
7.
8.
sand fillers
grease trap/Interceptor
oil/water separators
gravity subsurface treatment and disposal:
pressure subsurface treatment and disposal:
SPRAY IRRIGATION CLASSIFICATION
ON
(check all units that apply)
1. preliminary treatment (definition no. 32 )
2. lagoons
3. septic tanks
4._pump tanks
5. pumps
6. sand filters
7. grease trap/interceptor
8, oil/water separators
9. disinfection
10._chemical addition for nutrient/algae control
11. spray irrigation of wastewater
In addition to the above classifications, pretreatment of wastewater in excess of these components .shai-.
be rated using the point rating system and will require an operator with an appropriate dual certification .
i
LAND APPLICATION/RESIDUALS CLASSIFICATION (Applies only to permit holder)
1. __Land application of biosolids, residuals or contaminated soils on a designated site.
WASTEWATER TREATMENT FACILITY CLASSIFICATION
The following systems shall be assigned a Class I classification, unless the flow is of a significant quantity or the technology is unusually
complex, to require consideration by the Commission on a case -by -case basis: (Check if Appropriate)
1. OiVwater Separator Systems consisting only of physical separation, pumps and disposal;
2. Septic Tank/Sand Filter Systems consisting only of septic tanks, dosing apparatus, pumps,sand filters, disinfection
and direct discharge;
3. Lagoon Systems consisting only of preliminary treatment, lagoons, pumps, disinfection, necessary chemical treatment for
algae or nutrient control, and direct discharge;
4. Closed -loop Recycle Systems;
5. Groundwater Remediation Systems consisting only of oil/water separators, pumps, air -stripping, carbon adsorption, disinfection
and disposal;
6. Aquaculture operations with discharge to surface waters;
7. Water Plant sludge handling and back -wash water treatment;
8. Seafood processing consisting of screening and disposal.
9. Single-family discharging systems, with the exception of Aerobic Treatment Units, will be classified if permitted alter July 1,
1993 or if upon inspection by the Division, it is found that the system is not being adequately operated or maintained. Such
systems will be notified of the classification or reclassification by the Commission, in writing.

ttl .
o The following scale is used for rating wastewater treatment facilities: (circle appropriate point:
• fr.EM POINTS
(1) Industrial Pretreatment Units or Industrial Pretreatment Program (see definition No. 33)
(2) DESIGN FLOW OF PLANT IN gpd [not applicable to non -contaminated cooing waters, sludge handling facilities for
water purification plants, totally closed cycle systems(see.definition No. 11). and facilities consisting only of hem
(4)(d) or Items .(4)(d) and (11)(d))
0 - 20.000 1
20.001 - 50.000 ... 2
50.001 - 100.000. ... .3
100.001 - 260.000 4
250.001 - 500.000 5
500.001 - 1.000.000 .8
1.000,001 - 2.000.000 10
2.000.001 (and up) rate 1 point additional for each 200.000 gpd capacity up to a maximum of 30
Design Flow (gpd) `� . %" f ` • •' 0
(3) PRELIMINARY UNITS/PROCESSES (see definition No.32)
(a) Bar Screens 0
or
(b) Mechanical Screens. Static Screens or Comminuting Devices
(c) Grit Removal 1
or
(d) Mechanical or Aerated Grit Removal
(e) Flow Measuring Device . 1
or
(I) instrumented Flow Measurement »-
(g) Preaerallon f
(h) Influent Flow Equalization 2
(I) Grease or Oil Separators Gravity.................................................................................... ..2
Mechanical ... .3
Dissolved Air Flotation .8
• ()) Prechtorination -5
(4) PRIMARY TREATMENT M I'S/PROCESSES
(a) Septic Tank (see definition No. 43) • .... 2
(b) Imhoff Tank ... .... 5
(c) Primary Clarifiers ... -
(d) Settling Ponds or Settling Tanks for Inorganic Non -toxic Materials (sludge handling facilities for water
purification plants. sand. gravel. stone. and other mining operations except recreational activities such as gem
or gold mining) 2
(5) SECONDARYTREATMENT U ErS'PROCESSES •
(a) Carbonaceous Stage
(I) Aeration -High Purity Oxygen System 2 0
Diffused Air System
Mechanical Air System (fixed, floating or rotor) .8
Separate Sludge Reaeratlon 3
(ii) Trickling Filter
High Rate4)
Standard Rate..
Packed Tower ..... -5
(iii) Biological Aerated Filter or Aerated Biological Filter.........»....................»...........................10
(iv) Aerated Lagoons 10
(v) Rotating Biological Contactors 10
(vi) Sand Filters -intermittent biological 2
Recirculating biological 3
(vii) Stabilization Lagoons
(viii) Clarifier 6
(ix) Single stage system for combined carbonaceous removal of BOD and nitrogenous removal by
nitrification (see definition No. 12)(Points for this item have to be in addition to items
(5)(a)(1) through (5)(a)(viii),
utilizing the extended aeration process (see definition No.3a)
utilizing other than the extended aeration process e
(x) Nutrient additions to enhance BOD removal 5
(xI) Biological Culture ('Super Bugs')addition 5
(b) Nitrogenous Stage
(I) Aeration - High Purity Oxygen System 20
Diffused Air System 10
Mechanical Air System (fixed, floating or rotor) .8
Separate Sludge Reaeration .3
(il) Trickling Filter -High Rate 7
Standard Rate .5
Packed Tower .5
(iii) Biological Aerated Filter or Aerated Biological Filter 10
(iv) Rotating Biological Contactors 10
(v) Sand Filter - intermittent biological 2
Recirculating biological .3
(vi) gaffer
.5
(6) TERTIARY OR ADVANCED TREATMENT UNriSfPFCCESSES
(a) Activated Carbon Beds -
without carbon regeneration.. .5
with carbon regeneration 15
(b) Powdered or Granular Activated Carbon Feed -
without carbon regeneration .5
with carbon regeneration 15
(c) Air stripping .5
(d) Donitritication Process 10
(a) Eiectrodiafysis •5
(f) Foam Separation .5
(g) ion Exchange 5
(h) Land Application of Treated Effluent (see dolinition No. 22b) (not applicable for sand, gravel. atone
and other similar mining operations) by high rate infiltration 4
(I) Microscroons 5
()) Phosphorous Removal by Biological Processes (Soo definition No. 26) 20
(k) Polishing Ponds -without aeration 25
with aeration

• r
(I) Post Aeration - cascade 0
¢Iffused or mechanical CIP
(m) Reverse Osmosis 2
(n) Sand or Mixed -Media Filters - low rate
• high rate
(o) Treatment processes for removal of Metal or cyanide 15
15
(p) treatment processes for removal of toxic materials other than metal or cyanide
(7) SLUDGETREA1MENT
(a) Sludge Digestion Tank - Healed (anaerobic)
Aerobic 3 •
Unheated (anaerobic)
4)
(b) .-Sludge Stabilization (chemical or thermal)
(c) Sludge Drying Beds = Gravity
Vacuum Assisted ' (d) Sludge Elutriation 5,)
(e) Sludge Conditioner {chemical or thermal)
(f) Sludge Thickener (gravity) r.
(g) Dissolved Air Flotation Unit (not applicable to a unit rated as (3)(i))
(h) Sludge Gas Utilization (including gas storage)
(I) Sludge Holding Tank • Aerated
Non -aerated
(8)
S
(J) Sludge Incinerator (not including activated carbon regeneration) 10
(k) Vacuum Fitter, Centrifuge, or Filter Press or other similar dewatering devices 10
RESIDUALS UTILIZATION/DISPOSAL (including incinerated ash) 2
(a) Lagoons
(b) Land Application (surface and subsurface) (see definition 22a)
by contracting to a land application operator or landfill operator who
or landfill permit
(9) (c) Dedicated Landflii(burial) by the permittee of the wastewater treatment facility
(a) Chlorination
DISNMCDCel
(b) Dechlorination 5
(c) Ozone ( 'a
(d) Radiation
(10) CHEMICAL ADDITION SYSTEM(S) ( see definition No. 9) (not applicable to chemical additions rated as hem 3)11y, 6
(5)(a)(x1), (6)(a), (6)(b), (7)(b), (7)(e). (9a), (9)(b) or (9)(c) 5 points each:
List .4.. •'ri
/tr fir`• 5
5
(11) MISC91ANEWS UNITS/PRDCESSES
(a) Holding Ponds, Holding Tanks or Settling ▪ Ponds for Organic or Toxic Materials Including wastes from mining
operations containing nitrogen or phosphorus compounds in amounts significantly greater than is common 4
for domestic wastewater
(b) Effluent Flow Equalization (not applicable to storage basins which are inherent in land application systems) 2
(c) Stage Discharge (not applicable to storage basins inherent in land application systems)
(d) Pumps $
(e) Stand -By Power Supply
(f) Thermal Pollution Control Device TOTAL POINTS L
LASS!FiCATICN
Class I 5-25 Points
Class 11 26-50 Points
Class III 51-65 Points
Class N 66-Up Points
holds the land application permit
Facilities aving a rating of one through four points. Inclusive, do not require a certified operator.
Facilities having an activated sludge process will be assigned a minimum classification of Class II.
Facilities having treatment processes for the removal of metal or cyanide will be assigned a minimum classification of Class il.
Facilities having treatment processes for the biological removal of phosphorus will be assigned a minimum classification of Class Ill.
.0034 DEFINITIONS
The following definitions shah apply throughout this Subchapter.
(1) Activated Carbon Beds. A physical/chemical method for reducing soluble organic material from wastewater effluent; The column -type beds used in this
method will have a flow rate varying from two to eight gallons per minute per square foot and may be either upflow or downflow carbon beds. Carbon may
may not be regenerated on the wastewater treatment plant site;
(2) Aerated Lagoons. A basin in which ail solids are maintained In suspension and by which biological oxidation or organic matter is reduced through artificia
accelerated transfer of oxygen on a flow -through basis;
(3) Aeration. A process of bringing about intimate contact between air or high purity oxygen in a liquid by spraying, agitation or diffusion;(3a) Extended
Aeration. l An activated sludge process utilizing a minimum hydraulic detention time of 16 hours.
(4) Agriculturally managed she.' Any site on which a crop is produced, managed. and harvested (Crop includes grasses, grains, trees. etc.);
(5) Air St ipping. A process by which the ammonium Ion Is first converted to dissolved ammonia (pH adjustment) with the ammonia then released to the
atmosphere by physical means; or other similar processes which remove petroleum products such as benzene, toluene, and xylene;
(6) Carbon Regeneration. The regeneration of exhausted carbon by the use of a furnace to provide extremely high temperatures which volatilize and oxidize
absorbed Impurities; ..
(7) Carbonaceous Stage. A stage of wastewater treatment designed to 'achieve .'secondary' effluent limits;
(8) Centrifuge. A mechanical device in which centrifugal force is used to separate solids from liquids or to separate liquids of different densities;
(9) Chemical Addition Systems- The addition of chemicals) to wastewater at an application point•for purposes of Improving solids removal, pH adjustment,
alkalinity control, etc.; the capability to experiment with different chemicals and different application points to achieve a specific resuh will be considered one
system; the capability to add chemical(s) to dual units will be rated as one system; capability to add a chemical at a different application points for different
purposes will result in the systems being rated as separate systems;
(10) Chemical Sludge Conditioning. The addition of a chemical compound such as lime, ferric chloride, or a polymer to wet sludge to coalesce the mass pric
its application to a dewatering device;
(11) Closed Cycle Systems. Uso of holding ponds or holding tanks for containment of wastewater containing inorganic, non -toxic materials from sand, gra-
crushed stone or other similar operations. Such systems shall carry a maximum of two points regardless of pumping facilities or any other appurtenances;
(12) Combined Removal of Carbonaceous SOD aril Nitrogenous Removal by Nitrification- A single stage system required to achieve permit effluent limits on B
and ammonia nitrogen within the same biological reactor,
(13) Dechlorination. The partial or complete reauction of residual chorine in a liquid by any chemical or physical process;
(14) Denitrification Process. The conversion of nitrate -nitrogen to nitrogen gas;

a"
rt
„(15) Efectrodalysls. Process for removing ionized salts from water through the use of ion/selective ton -exchange membranes;
(16) Filter Press. A process operated mechanically for partially dewatering sludge;
(17) Foam Separation. The ptamad frothing of wastewater or wastewater effluent as a means of removing excesslve amounts of detergent materials through
the introduction of air In the fours of fine bubbles; also called foam fractionation;
(18) Grit Removal. The process of removing grit and other heavy mineral matter from wastewater;
(19) Imhoff Tank. A deep two story wastewater tank consisting of an upper sedimentation chamber and a tower sludge dtgeatton chamber.
(20) instrumented Flow Measurement. A device which Indicates and records rate of flow;
(21) Ion Exchange. A chemical process In which ions !rem two different moiecutes are exchanged;
(22) land applicallon:
(a) Sludge Disposal. A final sludge disposal method by which wet sludge may be applied to land either by spraying on the surface or by subsurface Injection
(le., chisel plow); (not l applicable for types of studgb described in (11) of this Rule);
(b) Treated Effluent. The process of spraying treated wastewater onto a land area or other methods of application of wastewater onto a land area as a
means of final disposal or treatment;
(23) Mtcroscteen. A tow speed, continuously back -washed, rotating drum fitter operating under gravity conditions as a polishing method for removing
suspended solids from effluent; •
(24) Nitrification Process. The biochemical conversion of unoxidized nitrogen (ammonia and organic nitrogen) to oxidized nitrogen (usually nitrate);
(25) Nitrogenous Stage. !A separate stage ol wastewater treatment designed for the specific purpose of converting ammonia nitrogen to nitrate nitrogen;
(26) Phosphate Removal, Biological The removal of phosphorus from wastewater by an oxlclanoxic process designed to enhance luxury uptake of phosphorus
by the microorganisms;
(27) PotisNng Pond. A hoking pond following secondary treatment with sufficient detention time to allow settling of finely suspended solids;
(28) Post Aeration. Aeration following conventional secondary treatment units 10 increase effluent D.O. or for any other purpose;
(29) Post Aeration. (Cascade) A polishing method by which dissolved oxygen is added to the effluent by a nonmechanical. gravity means al flowing down a
series of steps or weirs; The flow occurring across the steps or weirs moves in a fairly thin layer and the operation of the cascade requires no operator
adjustment; thus, zero points are assigned even though this Is an essential step to meeting the limits of the discharge permit;
(30) Powdered to Granular Activated Carbon Feed. A biophysical carbon process that utilizes biological activity and organic absorption by using powdered or
granular activated carbon; Virgin or regenerated carbon is feed controlled into the system;
(31) Preaeration. A tank constructed to provide aeration prior to primary treatment;
(32) Prettrninary Units. Unit operations in the treatment process, such as screening and comminution. that prepare the liquor for subsequent major operations;
(33) Industrial Pretreatment. and
(a) Pre-treatment Unit Industrfai. The conditioning of a waste at its source before discharge, to remove or to neutralize substances Injurious to sewers
treatment processes or to elfed a partial reduction In load on the treatment process which Is operated by the same governing body as the wastewater
treatment plant being I rated;
b) Pre-treatment Program. Industrial - must be a State or EPA required program to receive points on the rating sheet;
(34) Primary Clarifiers. The first settling tanks through which wastewater is passed In a treatment works for the purpose of removing senleable and suspended
solids and BOD which Is associated with the solids;
(35) •Pumps. All inituend effluent and in -plant pumps; •
(36) Radiation. Disinfection or sterilization process utilizing devices emitting ultraviolet or gamma rays;
(37) Reverse Osmosis. A treatment process In which a heavy contaminated liquid is pressurized through a membrane forming nearly pure iiquld free from
suspended solids;
(38) Rotating Biological Contractors. A flied biological growth process In which wastewater Bows through tanks In which a series of partially submerged circular
surfaces are rotated;
(39) Sand Filters:
(a) Intermittent Biological. Filtration of effluent following septic tanks. lagoons. or some other treatment
process
and have ain which
further
gprN� (comp Ohio n )�
expected to produce desired effluents; Hydraulic loading rates on these fibers are computed In gpdl
b) Recirculating biological - the same type ol sand lifter as defined in Subparagraph (39) (a) of this Rule with the added capability to recycle effluent back
through the sand litter.
(40) Sand or Mixed -Media Fitters. A polishing process by which effluent limits are achieved through a further reduction of suspended solids;
(a) low rate -- gravlty.jhydrauf tally Loaded filter with loading rates In the one to three gpm/sf range;
(b) high rate -- a pressure. hydraulically loaded titter with loading rates in the five gpmisf range; At any rate. the loading rate wilt exceed three gpm'sf;
(41) Secondary Clarifiers. A tank which follows the biological unit of treatment plant and which has the purpose of removing sludges associated with the
biological treatment unit;
(42) Separate Sludge Reparation. A pan of the contact stabilization process where the activated sludge is transferred to a tank and aerated before returning it
to the contact basin;
(43) Septic Tank- A single -story settling tank in which settled studge is in contact with the wastewater flowing through the tank; shall not be applicable for
septic tank systems serving single family residences having capacity ol 2.000 (pitons or less which discharge to a nitrification field;
(44) Sludge Digestion. The process by which organic or volatile matter and sludge is gashed. liquefied. mineralized or converted into more stable organic matter
through the activity of living organisms. which Includes aerated hotting tanks;
(45) Sludge Drying Beds. An area comprising natural or artificial layers of porous materials upon which digested sewage sludge is dried by drainage and
evaporation;
(46) Sludge Etutriat€on. A process of sludge conditioning in which certain constituents are removed by successive washings with fresh water or plant effluent;
(47) Sludge Gas Utilization. The process of using sewage gas for the purpose of heating buildings. driving engines. etc.;
(48) Sludge Holding Tank (Aerated and Nonaerated). A tank utilized for small wastewater treatment plants not containing a digester In whlch sludge may be t
kept fresh. and supernatant withdrawn prior to a drying method (i.e. sludge drying beds); This may be done by adding a small amount of air simply keep the
sludge fresh. but not necessarily an amount that would be required to achieve stabilization ol organic matter. A nonaeraled tank would simply be used to
decant studge prior to dewatering and would not allow long periods (several days of detention) without resuhing odor problems;
(49) Sludge Incinerators. A furnace designed to bum sludge and to remove ail moisture and combustible materials and reduce the sludge to a sterile nasm;
(50) Sludge Stabilization (Chemical or Thermal). A process to make treated studge less odorous and putrescbte, and to reduce the pathogenic orgy
content; This may be done by pH adjustment. chlorine dosing. or by heat treatment;
(51) Sludge Thickener. A type of sedimentation tank In which the sludge is permitted to settle and thicken through agitation and gravity;
(52) Stabilization Lagoon. A type of oxidation lagoon in which biological oxidation of organic matter is effected by natural transfer of oxygen to the water from
air (not a polishing pond);
(53) Stand -By Power Supply. On site or portable electrical generating equipment;
(54) Static Screens. A stationary screen designed to remove solids, including non.biodegradabte particulate (floatabte solids. suspended solids and BOD
reduction) from municipal and industrial wastewater treatment systems;
(55) Tertiary Treatment. 11. stage of treatment following secondary which is primarily for the purpose of effluent polishing; A settling lagoon or sand or coal r er
mtghl be employed for this purpose;
(56) Thermal Pollution Control Device. A device providing for the transfer of heal from a fluid flowing in tubes to another fluid outside the tubes, or vice versa;
or other means of regulating liquid temperatures;
(57) Thermal Sludge Conditioner. A conditioning process by which heat Is added for a protracted period of time to Improve the dewaterability of sludge by the
solubitizing and hydraulizing ol the smaller and more highly hydrated sludge panicles;
(58) Toxic Materials. Those wastes or combinations of wastes. lnctudhig disease -causing agents which after discharge and upon exposure. Ingestion, Inhalation
or assimilation Into any organism, either directly from the environment or indirectly by Ingestion through food chains, will cause death, disease, behavioral
abnormalities. cancer. genetic mutations. physiological malfunctions (including malfunctions in reproduction) or physical deformations. in such organisms or their
offspring; Toxic materials include. by way of iltustration and not limitation: lead. cadmium. chromium. mercury. vanadium. arsenic. zinc, onho-nitro-chlorobenzene
(ONCB). polychlorinated btphenyls (PCBs) and dichlorodiphenyl trtchloroethane (DDT); and any other materials that have or may hereafter be determined to have
toxic properties;
(59) Trickling Filter. A biological treatment unit consisting of a material such as broken stone or rock over which wastewater is distributed; A highdat acre:
fitter is ona which operated al between 10 and 30 rngd par acre. A low rate trickling litter Is one which is designed to operate al one to lour rig p Organic
(60) Trickling Filter (Packed Tower). A plug flow type of operation in which wastewater at [tows
Thisn method may produce h successive layers
secondary• dia quality filtrate
ate may e
material Is removed continually by the active biological fixed growth In each successive y
adapted to produce a nitrified effluent;
(61) Vacuum Filter. Centrifuges. or Filter Presses. Devices which are designed to remove excess water from either digested or undigestod sludgo prior to disposal
or Iunher treatment.

February 13, 1992
MEMORANDUM
TO: Dale Overcash
Permits and Engineering
FROM: Betsy Johnson
Technical Supp66rt
THROUGH: Mike Scoville 60
Ruth Swanek P(,5
SUBJECT: City of Henderson draft permit.
NPDES No. NC0020559
Vance County
These comments are in response to Henderson's review of their draft NPDES permit for
expansion of the WWTP from 4.14 to 6.0 MGD.
1. The available load capacity for some parameters has been consumed. The water
quality limited parameters are BOD5, NH3-N, TP, chlorine, cadmium, chromium, nickel,
lead, cyanide, mercury, fluoride, and MBAs. Limits for BOD5 and NH3-N were
determined by keeping the ultimate BOD loading the same while increasing the wasteflow.
The ammonia limit is needed to protect against ammonia toxicity. The limits are consistent
with "Best Available Technology" at this time. Limits for toxics were determined based on
an analysis of pretreatment information and observed effluent data. Mass balance
calculations were used to determine allowable effluent levels that will protect instream water
quality standards. A limit is required when the observed levels are within 1/10th of the
allowable levels.
Future expansion plans will be limited by the WWTP's ability to meet the water
quality standards at the end of pipe since above 6.0 MGD there is no additional dilution
available. Nutrient removal efficiency may also restrict any expansion plans. The TP limit
of 0.5 mg/1 is recommended based on observed instream water quality problems which can
be attributed to nutrient enrichment.
2. Conductivity monitoring is required at both 4.14 and 6.0 MGD in order to compare
effluent conductivity to instream conductivity values. The conductivity values will be
useful to determine actual dilution provided by Nutbush Creek.
3. Effluent monitoring for silver, zinc, copper, MBAs, and cyanide are required at
4.14 MGD as a result of an analysis of pretreatment information and observed effluent data
submitted to DEM by the City. Mass balances were calculated to determine allowable
effluent levels needed to meet instream water quality standards. Monitoring is required
when the observed levels are within 1/100
of the allowable levels. Silver, zinc, and copper have no state standards so they are not
limited at this time. The effluent copper exceeds its allowable level, while zinc is within
1/10th; limits would be required if there were standards rather than action levels.

4. Toxics limits are less stringent for the 6.0 MGD wasteflow than the 4.14 MGD
wasteflow due to differences in rounding off. The permit limits for 4.14 MGD are the
existing limits; the limits were written in mg/l. The limits for the 6.0 MOD permit were
developed using ug/1 and are more accurate. The limits at 4.14 MGD may be revised. The
following changes will result,
existing revised
chromium 50 52 ug/1
lead 25 26 mg/1
cadmium 2 2.1 ug/1
nickel 50 91 ug/1 *
cyanide monitor 5.1 ug/
MBAs monitor 511 ug/1
* the water quality standard has changed from 50 to 88 ug/1
5. Limits for cyanide, mercury, fluoride, and MBAs are based on an analysis of
pretreatment information and observed effluent data, including the priority pollutant
analysis. Mass balances were performed to determine allowable effluent levels that will
protect instream water quality standards. A limit is required wh
en hen the observed levels are
within 1/10th of the allowable levels.
6. Monitoring for copper, zinc, and silver are existing permit requirements based on
an analysis',of pretreatment information and observed effluent data. The chlorides limit is
based on the priority pollutant analysis which shows observed chlorides to be within 1/10th
of the allowable level. Diazinon was recommended for monitoring due to a 1988
toxicological survey of the Henderson WWTP. Diazinon, a pesticide, is extremely toxic to
ceriodaphnia at levels of 0.36 ug/1 or greater. Observed effluent levels of 0.49 and 0.31
ug/1 were found during the 1988 survey.
7. All new and expanding discharges are assigned chlorine limits. The chlorine limit
of 17 ug/1 is required for all discharges with an instream waste concentration near 100%.
Since there is little dilution available instream, the state action level must be met at the end -
of -pipe. Dechlorination or alternate disinfection is required for all new and expanding
discharges. j Toxics limits are needed in addition to toxicity testing in order to ensure
instream sta0dards and criteria are met.
If you have any questions, please let me know.
cc: Raleigh Regional Office

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January 9, 1992
CITY OF HENDERSON
NORTH CAROLINA
Dale Overcash
NC DEHNR - DEM
P. O. Box 29535
Raleigh, 7C 27626-0535
RE: CITY OF HENDERSON NUTBUSH WWTP
NPDES PERMIT #NC0020559
COMMENTS ON DRAFT PERMITS
Dear Mr. Overcash,
„f„),‘ 75.4i- hp.,
zfo)
OFFICE OF
PUBLIC UTILITIES DEPT.
UD
ice)
N)
On behalf of the City of Henderson I request review and response to
the following comments regarding the Draft Permits issued to the
Henderson! Nutbush Creek WWTP prior to these permits becoming
effective.
1. Item #2 on the Public Notice states for the 6.0 MGD permit that
for some parameters, the available load capacity of the
immediate receiving water will be consumed. What are these
parameters and how were they determined? What effect will they
have on any future plans to expand the Nutbush WWTP beyond 6.0
MGD? 'S NCbC _76 .0201 (c t )
2. For both the 4.14 and 6.0 MGD permits monitoring for
conductivity is required for the effluent. Is this a misprint?
If not, why was this monitoring added to the permits?
3. Why is effluent monitoring required for silver, zinc, copper,
MBAS and cyanide for the 4.14 MGD permit?
4. Why are the limits for chromium, lead, and nickel less
strip ent in the 6.0 MGD permit than in the 4.14 MGD permit?
If th limits in the 6.0 MGD permit are correct, shouldn't the
limits in the 4.14 MGD permit be adjusted?
5. Why were limits added to the 6.0 MGD permit for cyanide,
mercury, fluoride, and MBAS and how were these limits derived?
6. Why were monitoring requirements added to the 6.0 MGD permit
for copper, zinc, silver and especially diazinon and chlorides?

7. The ''6.0 MGD permit has a limit of 17.0 micrograms per liter for
total residual chlorine. Is it required to have this limit
since the plant has a chronic toxicity limit and must maintain
chlorine levels low enough not to be toxic?
Please ontact me at the address or phone number listed below if
you want to discuss any of the comments listed.
I want to extend my appreciation to you and your staff for your
assistance with these permits.
Sincerely,
Y-44„,a4,41,,402^1.-
Thomas M. Spain
Superintendent WWTP
City of Henderson
CITY OF HENDERSON
P.O. BOX 1434
HENDERSON; NC 27536
919 492-6167
TMS/kw
cc: Eric Williams, Henderson City Manager
Jerry Moss, Henderson General Services Dir.
Mike Acquesta, Peirson and Whitman, Inc.