NC0020559_Wasteload Allocation_19911121

NPDES DOCIMENT SCANNING COVER :MEET
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:
November 21, 1991
Thin documeat printed on reuse paper - ignore any
coateat on the rezrerse wide

NPDES WAS I E LOAD ALLOCATION
PERMIT NO.: NC0020559
PERMTITEE NAME:
FACILITY NAME:
City of Henderson
Nutbush Creek WWTP
Facility Status: Existing
Permit Status: Modification
Major Minor
Pipe No.: 001
Design Capacity: 6,0 MGD #`f . /44 ►Vii-) (c-u,`sf s„5
Domestic (% of Flow): 94.5 %
Industrial (% of Flow): 5.5 %
Comments:
Pretreatment information attached. Increasing to 6.0 MGD
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: Class IV
Classification changes within three miles:
Requested by: Rosanne Barona Date: 8/22/91
Prepared by:j,
Reviewed by: ! ,(
ac.r (./s
wcz
Date: /i// y q 1
Date: !1(w 4(
Modeler
Date Rec.
#
f A)
Kbr3/o !
V(oo
Drainage Area (mi2 ) g"
Avg. Streamflow (cfs): •', S-
7Q10 (cfs) (2: Winter 7Q10 (cfs) Day 30Q2 (cfs) p
Toxicity Limits: IWC % 7 % Acut r�on c 50
Instream Monitoring:
Parameters1)ai pI-I, tem p/C.nr,
Upstream
Downstream z- s, s
Effluent
Characteristics
s u,�,, �,,; (4. r
(`: s `C s j t
BOD5 (mg/1)
(0
/
Cadm►ur,,. d2
NH3-N (mg/1)
3
G(1.a 1,44.,.c.a— ,5Z)
D.O. (mg/1)
(P
N: Lket 5 U
TSS (mg/1)
30
j O
LeeLcl .2s—
F. Col. (/100 ml)
a.bv
.60
pH (SU)
6 _�
-re( ii)
/. v*
/,S/`
��+, t. )
WLC:M �v'�Z
maYv. -rc.
p
Lain Ei
adC" D 1,)
ri, Plat(! Secckli Ct. i
Location N('_ gj
Location �.t Ocwe,z (�(
0, M Mt _ Ct6C CGYA - �� `"�C"
7Crc- cJ
Comments: C ec(;ve- '`l /i! q`/
6,111bm - erri,rl, Coffer, Zinc , S�l��.- (yaya /A A-5
�_ I

NPDES WASTE LOAD ALLOCATION
PERMIT NO.: NC0020559
PERMITTEE NAME: City of Henderson
FACILITY NAME: Nutbush Creek WWTP
Facility Status: Existing
Permit Status: Modification
Major Minor
Pipe No.: 001
Design Capacity: 6.0 MGD
Domestic (% of Flow): 94.5 %
Industrial (% of Flow): 5.5 %
Comments:
Pretreatment information attached. Increasing to 6.0 MGD
RECEIVING STREAM: Nutbush Creek
Class: C
6arrvl
Yirrf
Sub -Basin:
03-02-06
Reference USGS Quad: B 25 SW
County: Vance
(please attach)
Regional Office: Raleigh Regional Office
Previous Exp. Date: 8/31/94 Treatment Plant Class: Class IV
Classification changes within three miles:
Requested by: Rosanne Barona
Date: 8/22/91
Prepared by: Date: /
Reviewed by: i 5�, %�a Date: 11 Ze
7302),4 /a (a3. sc•) 1 f z( 4
Yates. •.9E-
Modeler
Date Rec.
#
� z
!/•a 3 / 11
Co t%O(I
Drainage Area (mil ) 3, Fr Avg. Slrreamflow (cfs): 3. 5�
7Q10 (cfs) d� Winter 7Q10 (cfs) o, e-/ 30Q2 (cfs)
Toxicity Limits: IWC °I % Acut., " onic
Instream Monitoring: .* Q-,,,,�e,;-�
Parameters Doi ?H Cc t1 �c� t�e Q 5 � C c� �►� s
Upstream ✓ Location N C 3 9
Downstream, z .5; s Location el ?c) wee 1 i%t
`E�fluent
Characteristics
5,�.�,,i,a. �,)„(1,
ox i c5 � u � �
3
BOD5 (mg/1)
S
/ a
Cad.„:..rr. ,o
NH3 N (mg/1)
/. ?
Ch o.iiiw.r 61
D.O. (mg/1)
7
'%
m-Lke 1 10
TSS (mg/1)
3 0
3 D
Lead a Co
F. Col. (/100 ml)
aoD
c2fV
Cyari:de S, 1
pH (SU)
6 -1
- !
f l€r r ell
---rp 6.751,)
oe s
0
: 8°31 12-
to-ra el.,- 6.N3 i)
1 7
1 i
0.49A, 5-1 I
Comments: Mot. tlb,za coND I Copv 2 Kc , � tveg_ ii7; az3 non
C!n torude s

a.
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 #
City of Henderson - Nutbush Creek WWTP
NC0020559
94.5% Domestic / 5.5% Industrial
Existing
Modification
Nutbush Creek (arm of Kerr Lake)
C
03-02-06
Vance
Raleigh
Rosanne Barona
8/22/91
B25SW
6400
RECEIVED
UUI 23 19`
Raleigh Regional Office
Stream Characteristic:
USGS # 02.0792.6210
Date: 1988
Drainage Area (mi2): 3.8
Summer 7Q10 (cfs): 0.2
Winter 7Q10 (cfs): 0.4
Average Flow (cfs): 3.5
30Q2 (cfs): 0.5
IWC (%): ,_r98
Wasteload Allocation Summary
(approach taken, correspondence with region, EPA, etc.) _
Proposed expansion from 4.14 MGD to 6.0 MGD. A speculative WLA was done in• P990. Limits
are based on a QUAL2E modeling study and a nutrient survey of the Nutbush Creek of Kerr
Lake. Stringent toxics limits are required due to a dilution of 1.02:1. The WWTP hasziifficulty
passing its toxicity tests. There have been instream violations of metals limits and/or action levels.
Instream nutrient levels are high with a strong potential for algal blooms; a TP limit of 0.5 mg/1 is
required. TN limits may be required in the future.
Special Schedule Requirements and additional comments from Reviewers:
Recommended by: Date: /4/0/
Reviewed by
Instream Assessment: IILW - S 40(1, Date:
-X-- Regional Supervisor: ...0 ,z, Date: ////J/S/
Permits & Engineering: P,,,,.? Date: OM
(O(IS(RI
NOV 2 0 'i3'.� I
RETURN TO TECHNICAL SERVICES BY:
6.44 5e5 ; n 5-1-VearY1 inDn: ionn
lk);`1-i/1ohs W;+GI
ctve
i n aCCavdone -

2
CONVENTIONAL PARAMETERS
Existing Limits:
Wasteflow (MGD):
BOD5 (mg/1):
NH3N (mg/1):
DO (mg/1):
TSS (mg/1):
Fecal Col. (/100 ml):
pH (SU):
Residual Chlorine (µg/1):
Oil & Grease (mg/1):
TP (mg/1): 1* 1.5*
TN (mg/l): monitor monitor
* TP limit effective April 1, 1994
Recommended Limits:
Wasteflow (MGD):
BOD5 (mg/1):
NH3N (mg/1):
DO (mg/1):
TSS (mg/1):
Fecal Col. (/100 ml):
pH (SU):
Residual Chlorine (µg/1):
Oil & Grease (mg/1):
TP (mg/1):
TN (mg/1):
* TP limit effective April
Monthly Average
Summer Winter
4.14 4.14
6 12
3 6
6 6
30 30
200 200
6-9 6-9
monitor monitor
Monthly Average
Summer Winter
4.14 4.14
6 12
3 6
6 6
30 30
200 200
6-9 6-9
monitor monitor
1* 1.5*
monitor monitor
1,1994
Summer
6.0
5
1
7
30
200
6-9
17
0.5
monitor
Winter
6.0
10
1.9
7
30
200
6-9
17
0.5
monitor
Limits Changes Due To: Parameter(s) Affected
Change in 7Q10 data
Change in stream classification
Relocation of discharge
Change in wasteflow X BOD5, NH3-N, DO
Other (onsite toxicity study, interaction, etc.)
Instream data
New regulations/standards/procedures
New facility information
(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)

3
Type of Toxicity Test:
Existing Limit:
Recommended Limit:
Monitoring Schedule:
Existing Limits
Conductivity:
Cadmium (ug/1):
Chromium (ug/1):
Copper (ug/1):
Nickel (ug/1):
Lead (ug/1):
Zinc (ug/1):
Cyanide (ug/1):
Arsenic (ug/1):
Mercury (ug/1):
Silver (ug/1):
VI1343 090
Recommended Limits
TOXICS/METALS
Chronic ceriodaphnia, Quarterly
97
9.
MAR, JUN, SEP, DEC
Daily
Conductivity:
Cadmium (ug/1):
Chromium (ug/1):
Copper (ug/l):
Nickel (ug/1):
Lead (ug/1):
Zinc (ug/1):
Cyanide (ug/1):
Arsenic (ug/1):
Mercury (ug/1):
Silver (ug/1):
Diazinon (ug/1):
Fluoride (ug/1):
Chlorides (mg/1):
04-9Pc s L eg t c )
Limits Changes Due To:
Change in 7Q10 data
Change in stream classification
Relocation of discharge
Change in wasteflow
New pretreatment information
Failing toxicity test
Other (onsite toxicity study, interaction, etc.)
Daily Max.
monitor
2
50
monitor
50
25
monitor
monitor
monitor
Y4to h.��
Max. 4.14 MGD
monitor
2
50
monitor
50
25
monitor
monitor
monitor
W10r►�'T� r
6.0 MGD6) or EL
monitor
2
51
monitor
90
26
monitor
5.1
monitor
0.012
monitor
monitor
1839
monitor
srt
Parameter(s) Affected
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.

4
INSTREAM MONITORING REQUIREMENTS
Upstream Location: NC 39
Downstream Location: 1)at power lines 2) immediately above the confluence of Indian & Crooked (
Parameters: Temp, DO, Cond, pH, Fecal Coliform
Special instream monitoring locations or monitoring frequencies:
.x- see attachment (schedule applies to both wasteflows)
MISCELLANEOUS INFORMATION & SPECIAL CONDITIONS
Adequacy of Existing Treatment
Has the facility demonstrated the ability to meet the proposed new limits with existing treatment
facilities? Yes No X
If no, which parameters cannot be met? metals,
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?
The limits should be met upon expansion which will require a plant upgrade.
Special Instructions or Conditions
Wasteload sent to EPA? (Major) _Y (Y or N)
(If yes, then attach schematic, toxics spreadsheet, copy of model, or, if not modeled, then old
assumptions that were made, and description of how it fits into basinwide plan)
Additional Information attached? Y (Y or N) If yes, explain with attachments.
Schematic
Pretreatment Spreadsheet

Self -Monitoring Requirements
Summer (April - October):
DO
pH
Temp
Fecal Coliform
Conductivity
Secchi Depth
Chlorophyll a
Total Phosphorus
NH3-N
TKN
NO2-NO3
Frequency/Type
a. weekly t/grab
b. monthly/profile
a. weekly f/grab
b. monthly/profile
a. weekly #/grab
b. monthly/profile
We ek y 1/grab
Weekly #/grab
Winter (November - March):
DO
pH
Temp
Fecal Coliform
Conductivity
monthly/composite
monthly/composite
monthly/composite
monthly/composite
monthly/composite
monthly/composite
Frequency/Type
a. mont my/grab
a. •• - • .• /grab
Wee /grab
• / ab
t„Jeeicty monthly/grab
week \ . monthly/grab
Location
U,D1,D2
D1,D2
U,D1,D2
D1,D2
U,D1,D2
D 1,D2
U,D1 ) 1>z
U,D1) D�
D1,D2
D1,D2
D1,D2
D1,D2
D1,D2
D1,D2
Location
U,D 1,D2
U,D 1,D2
U,D1,D2
U,D1) -
U,D1) D�..
Profiles should be taken at 1 meter intervals.
Composites should be taken with a lab line in the photic zone,
Samples should be taken mid -morning. Rainfall data shall be
the seven consecutive days prior to the day of sampling.
Sampling Locations: Nutbush Creek at,
U:
D1:
D2:
i.e., 2 x secchi depth.
reported for
NC 39
at power lines
immediately above the confluence of Indian and Crooked Creeks

/7Gtders z 4/114d1P
Nv/ s-k ee
1
f
• 7
-a
Q 1317
•

Facility Name at/ r1eha€1S0r`. (tXdtl-> Permit # O551 Pipe # 00
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 °l D % (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
Mg J oN 56-P c . 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 cfs
Permitted Flow Li . I y MGD
IWC
Basin & Sub -basin 03 — — 0 C�
Receiving Stream 4i Sus k,
County Va.vIc+2
Recommended by:
QCL PIF Version 9/91

Facility Name
l.t ice' Permit # 65 S9 Pipec
d�. #
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 lb % (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
MO- J'J N4 ISP .1)(, . 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(wit in 30 days of initial monitoring event). Failure to submit suitable test results will constitute
noncompliance with monitoring requirements.
7Q10 0• a cfs
'Permitted Flow . D MGD
IWC �$ %
Basin & Sub -basin 03 - a O h
Receiving Stream Nin6iish. i'regk
County Vance
Recommended by:
QCL PIF Version 9191

Henderson WWTP - Nutbush Creek
Self -Monitoring Requirements — .6r b o+1,_ 4/. Iy a r2I G, o P96 i)
Summer (April - October):
Frequency/Type Location
DO a. weekly/grab U,D1,D2
b. monthly/profile D1,D2
pH a. weekly/grab U,D1,D2
b. monthly/profile D1,D2
Temp a. weekly /grab U,D 1,D2
b. monthly/profile D1,D2
Fecal Coliform weekly/grab U,D 1,D2
Conductivity weekly/grab U,D 1,D2
Secchi Depth monthly/eenvesite D1,D2
Chlorophyll a monthly/composite D 1,D2
Total Phosphorus monthly/composite D 1,D2
NH3-N monthly/composite D1,D2
TKN monthly/composite D 1,D2
NO2-NO3 monthly/composite D 1,D2
Winter (November - March):
Frequency/Type Location
DO a. weekly/grab U,D1,D2
pH a. weekly/grab U,D1,D2
Temp a. weekly/grab U,D 1,D2
Fecal Coliform weekly/grab U,D 1,D2
Conductivity weekly/grab U,D 1,D2
Profiles should be taken at 1 meter intervals.
Composites should be taken with a lab line in the photic zone, i.e., 2 x secchi depth.
Samples should be taken mid -morning. Rainfall data shall be reported for
the seven consecutive days prior to the day of sampling.
Sampling Locations: Nutbush Creek at,
U: NC 39
D 1: at power lines
D2: immediately above the confluence of Indian and Crooked Creeks

09/16/91 ver 3.1 T OXICS REVIEW
Facility:
NPDES Permit No.:
Status (E, P, or M):
HENDERSON
NC0020559
M
Permitted Flow: / `4_1 j mgd
Actual Average Flow: 2.0 mgd
Subbasin: '030206
Receiving Stream: NUTBUSH CREEK I PRETREATMENT DATA I----EFLLUENT DATA ----
Stream Classification: C I ACTUAL PERMITTEDI
7Q10: 0.2 cfs 1 Ind. + Ind. + 1 FREQUENCY
IWC: 96.98 % I Domestic PERMITTED Domestic 1 OBSERVED of Chronic
Stn'd / Bkg 1 Removal Domestic Act.Ind. Total Industrial Total I Eflluent Criteria
Pollutant AL Conc. 1 Eff. Load Load Load Load Load I Conc. Violations
(ug/1) (ug/1) 1 % (#/d) (#/d) (#/d) (#/d) (#/d) 1 (ug/1) (#vio/#sam)
Cadmium S 2.0 1 44% 0.1 0.0 0.07 0.0 0.090 1 5.0 1
Chromium S 50.0 1 60% 0.4 0.4 0.73 0.6 0.900 1 29.0 I I
Copper AL 7.0 1 77% 0.7 0.1 0.78 0.2 0.910 1 63.0 1 N
Nickel S 88.0 1 32% 0.5 0.0 0.55 0.2 0.750 1 41.0 1 P
Lead S 25.0 1 65% 0.2 0.0 0.19 0.4 0.620 1 14.0 1 U
Zinc AL 50.0 1 81% 2.3 0.2 2.45 0.4 2.720 1 34.0 1 T
Cyanide S 5.0 1 59% 0.7 0.0 0.70 0.0 0.700 1 26.0
Mercury S 0.012 1 86% 0.0 0.0 0.00 0.0 0.010 1 1 S
Silver AL 0.06 1 94% 0.2 0.0 0.18 0.0 0.180 1 1 E
Selenium S 5.00 1 90% 1 1 C
Arsenic S 50.00 1 40% 0.1 0.0 0.05 0.0 0.050 1 1 T
Phenols S NA 1 71% 0.4 0.1 0.40 0.1 0.440 1 1 I
NH3-N C 1 0% 1 1 0
T.R.Chlor.AL 17.0 1 0% 1 1 N
ALLOWABLE PRDCT'D PRDCT'D PRDCT'D MONITOR/LIMIT I--ADTN'L RECMMDTN'S--
Effluent Effluent Effluent Instream 1 Recomm'd
Conc. using using Conc. Based on Based on Based on 1 FREQUENCY INSTREAM
Allowable CHRONIC ACTUAL PERMIT using ACTUAL PERMITTED OBSERVED 1 Eff. Mon. Monitor.
Pollutant 1 Load Criteria Influent Influent OBSERVED Influent Influent Effluent 1 based on Recomm'd ?
(#/d) (ug/l) (ug/1) (ug/1) (ug/1) Loading Loading Data 1 OBSERVED (YES/NO)
Cadmium S I 0.06 2.062 2.370 2.975 4.85 Limit Limit Limit 1 NCAC YES 1 A
Chromium S I 2.25 51.558 17.315 21.251 28.12 Limit Limit Limit 1 NCAC NO 1 N
Copper AL I 0.55 7.218 10.597 12.355 61.10 Monitor Monitor Monitor 1 Weekly YES 1 A
Nickel S 1 2.33 90.743 21.933 30.106 39.76 Limit Limit Limit 1 NCAC NO 1 L
Lead S I 1.29 25.779 4.019 12.810 13.58 Limit Limit Limit 1 NCAC NO 1 Y
Zinc AL 1 4.74 51.558 27.491 30.507 32.97 Monitor Monitor Monitor 1 Monthly NO 1 S
Cyanide 5 1 0.22 5.156 16.942 16.942 25.21 Limit Limit Limit 1 NCAC YES 1 I
Mercury S 1 0.00 0.012 0.000 0.083 0.00 Limit 1 1 S
Silver AL 1 0.02 0.062 0.638 0.638 0.00 Monitor Monitor 1 I
Selenium S 1 0.90 5.156 0.000 0.000 0.00 1 1 R
Arsenic S 1 1.50 51.558 1.771 1.771 0.00 Monitor Monitor I 1 E
Phenols S 1 0.000 6.878 7.532 0.00 Limit Limit 1 1 S
NH3-N C 1 0.000 0.00 I 1 U
T.R.Chlor.AL 1 17.530 0.00 Limit 1 1 L
I I I T
I I I S
I

08/27/91 ver 3.1 T OXICS REVIEW
Facility:
NPDES Permit No.:
Status (E, P, or M) :
Permitted Flow: 6.0 mgd
Actual Average Flow: 2.0 mgd
Subbasin: '030206
Receiving Stream: NUTBUSH CREEK I PRETREATMENT DATA I----EFLLUENT DATA ----
Stream Classification: C I ACTUAL PERMITTED!
7Q10: 0.2 cfs I Ind. + Ind. + 1 FREQUENCY
IWC: 97.89 % I Domestic PERMITTED Domestic 1 OBSERVED of Chronic
Stn'd / Bkg 1 Removal Domestic Act.Ind. Total Industrial Total 1 Eflluent Criteria
Pollutant AL Conc. 1 Eff. Load Load Load Load Load 1 Conc. Violations
(ug/1) (ug/1) 1 % (#/d) (#/d) (#/d) (#/d) (#/d) 1 (ug/1) (#vio/#sam)
HENDERSON
NC0020559
M
Cadmium S 2.0 1 44% 0.1 0.0 0.07 0.0 0.090 1 ( 5.02 >Z
Chromium S 50.0 1 60% 0.4 0.4 0.73 0.6 0.900 1 29.0 1 I
Copper AL 7.0 I 77% 0.7 0.1 0.78 0.2 0.910 1 63i -01 N
Nickel S 88.0 1 32% 0.5 0.0 0.55 0.2 0.750 1 41.0 1 P
Lead S 25.0 1 65% 0.2 0.0 0.19 0.4 0.620 1 14.0 1 U
Zinc AL 50.0 1 81% 2.3 0.2 2.45 0.4 2.720 1 34.0 I T
Cyanide S 5.0 1 59% 0.7 0.0 0.70 0.0 0.700 1 `26.d y 5.1
Mercury S 0.012 1 86% 0.0 0.0 0.00 0.0 0.010 1 1 S
Silver AL 0.06 1 94% 0.2 0.0 0.18 0.0 0.180 I I E
Selenium S 5.00 1 90% 1 1 C
Arsenic S 50.00 I 40% 0.1 0.0 0.05 0.0 0.050 1 1 T
Phenols S NA 1 71% 0.4 0.1 0.40 0.1 0.440 1 1 I
NH3-N C 1 0% 1 1 0
T.R.Chior.AL 17.0 1 0% 1 1 N
Pollutant
ALLOWABLE PRDCT'D PRDCT'D PRDCT'D MONITOR/LIMIT I--ADTN'L RECMMDTN'S--
Effluent Effluent Effluent Instream 1 Recomm'd
Conc. using using Conc. Based on Based on Based on 1 FREQUENCY INSTREAM
Allowable CHRONIC ACTUAL PERMIT using ACTUAL PERMITTED OBSERVED 1 Eff. Mon. Monitor.
Load Criteria Influent Influent OBSERVED Influent Influent Effluent 1 based on Recomm'd ?
(#/d) (ug/1) (ug/1) (ug/1) (ug/1) Loading Loading Data 1 OBSERVED (YES/NO)
Cadmium S 1 0.06 2.043 2.370 2.975 4.89 Limit Limit Limit I NCAC YES 1 A
Chromium S 1 2.25 51.075 17.315 21.251 28.39 Limit Limit Limit 1 NCAC NO 1 N
Copper AL 1 0.55 7.151 10.597 12.355 61.67 Monitor Monitor Monitor I Weekly YES 1 A
Nickel S 1 2.33 89.892 21.933 30.106 40.14 Limit Limit Limit 1 NCAC NO 1 L
Lead S 1 1.29 25.538 4.019 12.810 13.71 Limit Limit Limit 1 NCAC NO 1 Y
Zinc AL 1 4.74 51.075 27.491 30.507 33.28 Monitor Monitor Monitor I Monthly NO 1 S
Cyanide S 1 0.22 5.108 16.942 16.942 25.45 Limit Limit Limit I NCAC YES 1 1
Mercury S 1 0.00 0.012 0.000 0.083 0.00 Limit 1 1 S
Silver AL 1 0.02 0.061 0.638 0.638 0.00 Monitor Monitor 1 I
Sn S 1 0.90 p f- ' 58 0.000 0.000 0.00 1 1 R
Arsenic S I 1.50 51.075 1.771 1.771 0.00 Monitor Monitor 1 1 E
Phenols S 1 0.000 6.878 7.532 0.00 Limit Limit 1 1 S
NH3-N C 1 0.000 0.00 1 1 U
T.R.Chlor.AL 1 17.366 0.00 Limit 1 1 L
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FIGURE T,
ISLAND CREEK
RESERVOIR
WATER ELEV. 260
co
,St Tungslon
.0'
1339
1338
119.
Hicks
Crossr a s
1303
N
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h
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Crossroads
Run
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132i
1 t •
MECKLENBURG CO.
HENDERSON
_ POP.13.522
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ii> L{98.
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N. ilENDERSON
wJ
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a
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1507
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Rai•
151
1517
1607
1.5
1313

DIVISION OF ENVIRONMENTAL MANAGEMENT
December 7, 1990
MEMORANDUM
TO: Alan Clark p��
THROUGH: Trevor Clement +\
FROM: Ruth Swanek-, \l
SUBJECT: City of Henderson 201 Plan Review
Nutbush Creek WWTP (030206)
NPDES No. NC0020559
Vance County
I have reviewed the 201 plan for the City of Henderson's pro-
posed expansion to 6 MGD and offer the following comments:
1. On page VI-B-7, the report states that the winter cadmium
limit is 0.005 mg/1. This should be changed to 0.002 mg/1.
2. The report lists the speculative chemical specific toxics
limits provided to the City. However, it only addresses how the
facility will comply with its chlorine limit. The report should
include information on whether the metals limits can be achieved
through the current pretreatment program or if it must be modified.
In addition, the report omits the speculative chronic toxicity
limit (Ceriodaphnia at 98%) .
The remainder of the 201 plan looks reasonable to Technical
Support. If you have any questions or comments, please contact me
at extension 507.