NC0025534_Permit (Modification)_20030326

NPDES DOCYHENT SCANNING COVER SHEET
Ask
Allay
AMIN
AIM lk
pabn
AM 11
.,
ink
0114
NPDES Permit:
NC0025534
Hendersonville WWTP
Document Type:
Permit Issuance
Wasteload Allocation
Authorization
to Construct (AtC)
"Permit
Modification
Complete File - Historical
Correspondence
Speculative Limits
Instream Assessment (67b)
Environmental Assessment (EA)
Permit
History
Document Date:
March 26, 2003
This document is printed on reuse paper - ignore any
content on the reszerse side
INN

State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
Michael F. Easley, Governor
William G. Ross, Jr., Secretary
Alan W. Klimek, P.E., Director
March 26, 2003
Mr. Ezra Allman, Director
City of Hendersonville Water and Sewer Utilities
P.O. Box 1760
Hendersonville, North Carolina 28793
AVA
NCDENR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
Subject: NPDES Permit Modification
Permit NC0025534
Hendersonville WWTP
Henderson County
Dear Mr. Allman:
The Division has reviewed and approved your request to change Mercury sampling from Composite to Grab in the
subject permit.
Please find enclosed the revised permit pages. The revised pages should be inserted into your permit. The old pages
may then be discarded. All other terms and conditions contained in the original permit remain unchanged and in full
effect. This permit modification is issued under the requirements of North Carolina General Statutes 143-215.1 and
the Memorandum of Agreement between North Carolina and the U. S. Environmental Protection Agency.
If any parts, measurement frequencies or sampling requirements contained in this permit modification are
unacceptable to you, you have the right to an adjudicatory hearing upon written request within thirty (30) days
following receipt of this letter. This request must be a written petition conforming to Chapter 150B of the North
Carolina General Statutes, filed with the Office of Administrative Hearings (6714 Mail Service Center, Raleigh, North
Carolina 27699-6714)_ Unless such demand is made, this decision shall be final and binding.
If you have any questions concerning this permit modification, please contact Christie Jackson at telephone number
[phone], extension 538.
Sincerely,
1.� L Alan W. Klimek, P.E.
cc: Central Files
Asheville Regional Office, Roy Davis
Point Source Compliance Enforcement Unit
011111811111,
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
An Equal Opportunity Affirmative Action Employer
Telephone [phone] FAX [phone]
VISIT US ON THE INrrERNET @ http:l/h2o.enr.state.nc.us/NPDES

Permit NC0025534
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS — FINAL
During the period beginning on the effective date of this permit and lasting until
expansion above 3.2 MGD, the Permittee is authorized to discharge from outfall 001.
Such discharges shall be limited and monitored by the Permittee as specified below:
n ,z pr i iL� y�
Ls
.-4. 'f% r
�hY'4M�. i+..3'�'�., Yf
r..
-
'S.T+l"1 4..1�
�C...7Yr1h-r�,_1 � �
'�Z4Y ' TSTt
r :a•• t to r^.T
"�^
'` } 3 �a,xl?,..,; iYi
.. r 1
�I
' b 1 ` '7',.r.-'...:.$i. 9 .1_-,---
4 �, F....'Cu'f"w
a1 yea
h:e
S.
1 �`
4
ja t " ' ijz t r � xx;
t',tr dF7. ti y�� _..i� e.d
,,,, .. rit' ^tl 61.y�ri�..r 'r iF i`n.' a.
� - �4� •rR..l-' !. 4 ='`r 'S.--4'; 3
:;.5')'CYiW�'�i�F1.,i�.rll,..,.Y,. �12':Y�-.. ., _..Lrori;=i As1;:i,1 \,.L.:28'J
Y-' F .:
e .
. , y - fv�.S.L. :t
I�
wi++F-'^'C'�' �T: ...?'
��fi
t:
YY
1'
"` 1
,� .
..,
•
y 7J
m ..:`W.r
Y
...
'y
11
Tl� Q, •
.. 3"h:"4,,
a i ,,,,it
�.,,,•1 r' 'T.l�'t!�`
Flow
3.2 MGD
Continuous
Recording
I or E
BOD, 5-day (20°C)2
30.0 mg/L
45.0 mg/L
Daily
Composite
I & E
Total Suspended Solids2
30.0 mg/L
45.0 mg/L
Daily
Composite
I & E
NH3 as N
Daily
Composite
E
Dissolved 0xygen3
Daily
Grab
E, U, D
Fecal Coliform (geometric mean)
200/100 ml
400/100 ml
Daily
Grab
E, U, D
Total Residual Chlorine
Daily
Grab
E
Temperature (QC)
Daily
Grab
E, U, D
Total Nitrogen
(NO2+NO3+TKN)
Quarterly
Composite
E
Total Phosphorus
Quarterly
Composite
_
E
Chronic Toxicity'
Quarterly
Composite
E
pH5
Daily
Grab
E
Cadmium
9 µg/L
Weekly
Composite
E
Cyanide
22 µg/L
22.5 µg/L
Weekly
Grab
E
Mercury
0.05 µg/L
Weekly
Grab
E
Copper
2/Month
Composite
E
Zinc
2/Month
Composite
_
E
Silver
2/Month
Composite
E
Selenium
20 µg/L
22.5 µg/L
Weekly
Composite
E
Lead
34 µg/L
113 µg/L
Weekly
Composite
E
Footnotes:
1. E: Effluent, I: Influent, U: Upstream in Mud Creek above outfall; D: Downstream at NCSR 1365.
Upstream and downstream samples shall be grab samples. Stream samples shall be collected
three times per week during June, July, August and September and once per week during the
remaining months of the year.
2. The monthly average effluent BOD5 and Total Suspended Residue concentrations shall not
exceed 15% of the respective influent value (85% removal).
3. The daily average dissolved oxygen effluent concentration shall not be less than 5.0 mg/L.
4. Whole effluent toxicity will be monitored using the Pass/Fail Chronic Toxicity test with
Ceriodaphnia at 22%. See A.(4.).
5. The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units.
There shall be no discharge of floating solids or visible foam in other than trace amounts

•
Permit NC0025534
A. (2.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS — FINAL
During the period beginning upon expansion above 3.2 MGD and lasting until
expansion above 4.8 MGD, the Permittee is authorized to discharge from outfall 001.
Such discharges shall be limited and monitored by the Permittee as specified below:
w. � ------`-2i' _ 'm
+ __ ,.�, Y.. . t j �`
-.7� ..C' tih$RF F L i/ "2.�.r., ._4,"3+%) - SY' ',.
z 7 �y 7�'�' E .r tt (..., at e "�w-y i1x•'�
.� L.
� --�-z' 7„�.,.f v .w,,,�''r� �i',^_'�� `r�`' �`"`•t �,��'` r7 �=e�
r
" I G : r_ 0 0
..M � yi .r �?i
. 3 i 3�;.�..i.��G
n L .. - �
`-.-..WK iC. Sr ten° ' 1S.,,3_
"'. �3
0 ! 1, °1
`Y'
L 7-� 2" _ -
��d"' 7�••�..c _. rn �--+ .
� �' S - ��
re.
y ""ImS W{-�s}�e+ [LL, •�`
T
;� M
. .. 11= (F-: `
i�t'.��� r
�'��Ja:F !�
3 �y,
-l:.`
�t � .1r,
7a�
1L5
�-.-' r.,
�,.. 4
t) at
X'�i''.�..`.� lk_q*—VI•
_
V-a
��._
�..�,�.•,�+-`.
�_" �«
ja
1:myµ ±T• a�
t.i`i.. ; Y "f ^'_"
t?''_zY::: .:` `.'=�;I. il. x_-a.% Yi.-_.3a^
����. ��..z.l^.��i�yr�'r
.
..6
�."
�� ..a_;.Y.._.
.. % •=• _
e�-`�� T��3
Flow
4.8 MGD
Continuous
Recording
I or E
BOD, 5-day (202C)2
(April 1- October 31)
10.0 mg/L
15.0 mg/L
Daily
Composite
I & E
BOD, 5-day (202C)2
(November 1- March 31)
20.0 mg/L
30.0 mg/L
Daily
Composite
I & E
Total Suspended Solids2
30.0 mg/L
45.0 mg/L
Daily
Composite
_ I & E
NH3 as N
(April 1- October 31)
2.0 mg/L
Daily
Composite
E
NH3 as N
(November 1- March 31)
4.0 mg/L
Daily
Composite
E
Dissolved Oxygen3
Daily
Grab
E, U, D
Fecal Coliform (geometric mean)
200/100 mi
400/100 ml
Daily
Grab
E, U, D
Total Residual Chlorine4
28 µg/L
Daily
Grab
E
Temperature (2C)
Daily
Grab
E, U, D
Total Nitrogen
(NO2+NO3+TKN)
Quarterly
Composite
E
Total Phosphorus
Quarterly
Composite
E
Chronic Toxicity5
Quarterly
Composite
E
pH6
Daily
Grab
E
Cadmium
11 µg/L
Weekly
Composite
E
Cyanide
22 µg/L
28 µg/L
Weekly
Grab
E
Mercury
0.07 µg/L
Weekly
Grab
E
Copper
2/Month
Composite
E
Zinc
2/Month
Composite
E
Silver
2/Month
Composite
E
Selenium
20 µg/L
28 µg/L
Weekly
Composite
E
Lead
34 µg/L
142 µg/L
Weekly
Composite
E
Footnotes:
1. E: Effluent, I: Influent, U: Upstream in Mud Creek above outfall; D: Downstream at NCSR 1365.
Upstream and downstream samples shall be grab samples. Stream samples shall be collected
three times per week during June, July, August and September and once per week during the
remaining months of the year.
2. The monthly average effluent BOD5 and Total Suspended Residue concentrations shall not
exceed 15% of the respective influent value (85% removal).
3. The daily average dissolved oxygen effluent concentration shall not be less than 5.0 mg/L.
4. The total residual chlorine limit and monitoring requirements are only applicable if facility uses
chlorination for disinfection.
5. Whole effluent toxicity will be monitored using the Pass/Fail Chronic Toxicity test with
Ceriodaphnia at 18%. See A.(5.).
6. The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units.
There shall be no discharge of floating solids or visible foam in other than trace amounts

Permit NC0025534
A. (3.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS - FINAL
During the period beginning upon expansion above 4.8 MGD and lasting until expiration,
the Permittee is authorized to discharge from outfall 001. Such discharges shall be limited
and monitored by the Permittee as specified below:
EFFLUENT
CHARACTERISTICS
LIMITS
MONITORING REQUIREMENTS
Monthly
Average
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Sample Location'
Flow
6.0 MGD
Continuous
Recording
I or E
BOD, 5-day (20°C)2
(April 1 - October 31)
10.0 mg/L
15.0 mg/L
Daily
Composite
I & E
BOD, 5-day (20°C)2
(November 1 - March 31)
20.0 mg/L
30.0 mg/L
Daily
Composite
I & E
Total Suspended Solids2
30.0 mg/L
45.0 mg/L
Daily
Composite
I & E
NH3 as N
(April 1 - October 31)
2.0 mg/L
Daily
Composite
E
NH3 as N
(November 1 - March 31)
4.0 mg/L
Daily
Composite
E
Dissolved Oxygen3
Daily
Grab
E, U, D
Fecal Coliform (geometric mean)
200/100 ml
400/100 ml
Daily
Grab
E, U, D
Total Residual Chlorine4
28 pig/
Daily
Grab
E
Temperature (9C)
Daily
Grab
E, U, D
Total Nitrogen
(NO2+NO3+TKN)
Quarterly
Composite
E
Total Phosphorus
Quarterly
Composite
E
Chronic Toxicity,
Quarterly
Composite
E
pHs
Daily
Grab
E
Cadmium
9.5 µg/L
Weekly
Composite
E
Cyanide
22 µg/L
24 µg/L
Weekly
Grab
E
Mercury
0.06 µg/L
Weekly
Grab
E
Copper
2/Month
Composite
E
Zinc
2/Month
Composite
E
Silver
2/Month
Composite
E
Selenium
20 µg/L
24 µg/L
Weekly
Composite
E
Lead
34 µg/L
119 µg/L
Weekly
Composite
E
Footnotes:
1. E: Effluent, I: Influent, U: Upstream in Mud Creek above outfall; D: Downstream at NCSR 1365.
Upstream and downstream samples shall be grab samples. Stream samples shall be collected
three times per week during June, July, August and September and once per week during the
remaining months of the year.
2. The monthly average effluent BOD5 and Total Suspended Residue concentrations shall not
exceed 15% of the respective influent value (85% removal).
3. The daily average dissolved oxygen effluent concentration shall not be less than 5.0 mg/L.
4. The total residual chlorine limit and monitoring requirements are only applicable if facility uses
chlorination for disinfection.
5. Whole effluent toxicity will be monitored using the Pass/Fail Chronic Toxicity test with
Ceriodaphnia at 21%. See A.(6.).
6. The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units.
There shall be no discharge of floating solids or visible foam in other than trace amounts