NC0041696_Staff Comments_19950418

NPDES DOCUMENT SCANNING COVER SHEET
NC0041696
Lake Rhodhiss WWTP
NPDES Permit:
Document Type:
Permit Issuance
,/
frier
y,i, 1 am%.
Authorization to Construct (AtC)
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Staff Comments
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Document Date:
April 18, 1995
Whim document is printed on reuse paper - ignore any
content on the rezzerse side

Page 1
Note for Jackie Nowell
From: Carla Sanderson
Date: Tue, Apr 18,1995 3:52 PM
Subject: RE: valdese
To: Jackie Nowell; Susan Wilson
I concur!!
From: Jackie Nowell on Mon, Apr 17, 1995 9:47 AM
Subject FW: valdese
To: Carla Sanderson
Responded to Susan last week about Valdese and phenols limit, I recommended continuation
of weekly sampling. When talking about how we didn't have a 30q2 flow on Lake Rhodhiss
for phenols and that limit probably should be a little higher, she recommended changing
monitoring frequency for the limit to 2 per month instead of weekly, since limit is probably
too stringent.
What do you think about the reduction to 2/mo? Although I requested weekly in my
response, I think as long as the phenols limit remains in the permit, a frequency reduction
may be okay.
From: Susan Wilson on Mon, Apr 17, 1995 9:31 AM
Subject valdese
To: Jackie Nowell
any more thoughts on phenols limit and frequency for valdese?

DIVISION OF ENVIRONMENTAL MANAGEMENT
April 5,1995
MEMORANDUM
TO:
FROM:
THRU:
SUBJECT:
Susan Wilson
Jackie Nowell
Ruth Swanek
Carla Sanderson
Draft Permit Comments for Town of Valdese WWTP
NPDES Permit No. NC0041696
Burke County
The Instream Assessment Unit has reviewed the draft comments from the subject
facility concerning the monitoring frequency for NH3 and phenols. We acknowledge the
financial concerns raised by the Town because of the increase in monitoring. However, we
would like to point out that effluent monitoring for several metals and other substances,
(which include cadmium, copper, nickel, lead, zinc, chromium , chlorides, and sulfates)
has been deleted from the NPDES permit. It would appear that no longer having to sample
for all these parameters could provide some savings to the Town that may offset the
additional cost for monitoring for NH3 and phenols.
Regarding the comment, that no other nearby dischargers in the Catawba River
Basin have a phenols limits except Valdese. It should be noted that a review of permit
applications by the Towns of Morganton and Lenoir, indicate that phenols is not discharged
from their effluent pipe. On the other hand, Valdese indicates on its permit application that
phenols is present in their effluent and subsequent sampling confirms it.
A further evaluation of the phenols data determines that Valdese's effluent should
have a limit for the protection of the receiving waters. The data indicates that while it was
not exceeded, several of the monthly phenols values in 1994 have been close to the limit of
21 µg/1. In fact, in July 1993, the phenols limit would have been exceeded. Based on this
information, we do not recommend that the monitoring frequency of phenols be reduced
back to monthly. We recommend that Valdese continue with the weekly sampling for
phenols and after twelve months they can request that the Division reevaluate the data.
Regarding NH3, because of the consistently low values (often less than 1 mg/1) of
NH3 that have recorded over two years, we will recommend that the monitoring frequency
for NH3 be revised from 3 per week to weekly.
If there are additional questions, please contact me.
cc: Forrest Westall
Central Files
WLA File

Va0crc. !ai(/'
TOXICANT ANALYSIS
'arameter =
Phenols
Standards
; 1wg/l
n
BDL=1/2DL
Actual Data
RESULTS
1
5
< 10
Std Dev.
12.84
2
14
14
Mean
10.36
3
5
<1 0
C.V.
1.24
4
12
12
5
5
< 10
6
; 5
< 10
Mult Factor =
_.,_. .0004110
�3.6
7
5
< 10
Max. Value
68
µg/1
ptg/1
8
5
< 10
Max. Pred Cw
244.8
9
5
< 10
Allowable Cw
20.7
µg/I
10
5
<10
11
11
11
12
5
<1 0
13
15
15
14
15
15
15
11
11
16
68
68
17
; 21
21
18
12
12
19
5
<10
20
5
<1 0
21
5
<1 0
22
5<10
23,
5<10
24
5
<10
25
5<10
26
27
4/5/95
PAGE

Memorandum
To:
From:
DIVISION OF ENVIRONMENTAL MANAGEMENT
Ms. Jackie Nowell
Susan A. Wilson
April 3, 1995
Subject: Valdese WWTP (Lake Rhodhiss WWTP)
Draft Permit Comments
NC0041696
Burke County
Please review the enclosed comments submitted by D. Alan Abee, Superintendent of the
WWTP. The NH3-N frequency of 3/Week is a requirment of 15A NCAC 2B .0500.
However, please review the facility's data regarding phenols to determine if the frequency
may be reduced. This is a Class IV facility, so weekly sampling was recommended for
phenols (due to the parameter being limited).
The schedule to issue date for this permit is April 15, 1995.

TOWN OF VAL•DESE
TEL
Mar 31,95 14:17 No.003 P.02
Marti 3 1996
TOWN.:.;O .VAL:DESE
NORTH CAR04NA'B FRIBNOLY;TOWN
P.O. 80X 339
VALD�BE,'NORTH CAROLJNA28690•0339
PHONE (704)137G 212.I.
Lake Rhodhjss Wastewater Treatment Plant
Department of Environment, Health, & Natural Resources
Division of Environmental Management
.1',O.; J (*, 29536
aleigh, l$C, 27626
tteni Susan Wilson
:Dear Ms. Wilson
•
In'regards to the draft perniit recently issued. to the Lake Rhodhiss Wastewater Treatment Plant (NPDES Permit # NC004.1696), there: are. several :. -questions which have arisen pertaining to two parameters, NH3•N and phenols. A,a
you can gee by the enclosed information of the Lake Rhodhiss effluent ..
concentratjons of NH3-N andphenols, this plant. has not had any problems
handling the loadings to the plant for either parameter,
:''1'ht new requirements for both of these parameters is cause forconcern;.
however, the change in the phenol requirements need clarification,
Upon discussion with other POTW's, in close vicinity to the Town of Valdese, which
alao :discharge into the Catawba River Basin and/or,it's tributaries, it was • .,
discovered that only the Lake Rhodhiss Wastewater Treatment Plant was required
to analyze for. phenols. This is acceptable based upon ;the fact that this analysis was also 'a measured parameter under the old permit. The point which needs . clarification is the frequency change from once per month to once per week with the:
inclusion of a daily limit set for this parameter, considering that this parameter
analysis is not required of other Catawba River Basin dischargers.
The increased sampling frequency of NH3-N will increase our cost from
$988.00 per year to $2,964.00 per year. The increased sampling frequency of
phenols will. increase our costs from, $$40.Op. per year, to $2340,00 per year, these
cost projections do not include the extra cost of manpower associated with
trarisporting the samples to the outside: test laboratory. This shows an i.norease in
cost of $3,778,00 that we will have to budget `fax our new year,
•
•

TQWN OF VALDESE
TEL
Mar 31,95 14:17 No.003 P.03
. !1:. •%•:.+'• ..:.. . . :<.._ ...r:.•.
c• .:Due to budget restraints, we are requesting that the NH3'N free uencY
continue at a weekly basis, and the phenol freqm
uen, , reain.on a raon
o
thirto
• • • •• wevpreoiate your understsli ' and •
matter, ding. eonaid�ratiou of our concerns in thi$,.
piler
S•
incerely,
• D. Alan .bee •
S 4erintendent
lItItttrtit4113 •
(Page, 2 0f 5)
•
Yyl .

TOWN OF VALDESE
TEL:[phone] Mar 31,95
14:18 No.003 P.04
Pieuols .
•Efiliiiiii.Concentrations
•
j994
.. 2-24
• •..�8,
• . -25
9�2 :•2'.
: 10-20
• 111.0 ". .
• 12:15:: r.: • •
•
•
• `.1.24-
g.!?
• '549 .
• ••7M27• . •
8-25 •
9*1$ •
1.0=,
•
I
-8 • • . .
• •. p.0iible Laboratory Error
g�!1114
0.011 1-14
<0.010 .2-8':.
<0.010•• •`• '346
<0.010 • 44p::.,. "
<0.010• 5-11
<0.01.0 8.2 ..
50,010 7�2:
0.012 • . 8-25 .
<0.010 9-16
<'0.010 10-28...
0.016 12-16
<0.010 1.22 •
<0.010 •• 2-7 •
<0.010'". 3.18
<10* 4.12
<0.010 548 '
<0.010 8-12 .
<0.010 7-16
<0,010 • 8.15
<0.010 9.17
<0.010 10.22• ..•
<0.01 A:. 11-14 . • • •
<0.010 • 12-16 .
•
• %�• i� �.. _ . • , ., -,•4r ''' .• •
mud
•
<0.010 .
• •<6.4310
0:015 •
<0,010 :
.<4.010•••
• : Q,021 •.` :
0.012 . • •
<U.010'
140.10 •
<;0.10 • .•
:
0.476. •
•'<0,010 ..
•
010 .
'o.a10
50;010'
• y �� % . •
(Page: of 5)
o
•

TOWN OF VALDESE
TEL:[phone] Mar 31,95 14:18 No.003 P.05
::': N144,1 •Ettluent Concentrations
1994 '.
DAtiL
. :3.3 .
3-10
.3;16 ••
.•:4-7 •.
4-14
. 5=5
$20 •
• 64.....
6-14 •
• • 1-71•• •�' •
Lab Error 7-7
O.I9 ' 744
0.93 . '740
1;12
1.01 8-4
0.25 8-11
0.75 . 8-18
1.74 8-26
0.64 y„Z
0.71 9-8.
0.'19 ' 9-16.
0.50 • 952i
0.53 . •
9�28. •
1.15 .104 • .
<0.2S •1041•..: •
<0.50 . , .. 10.20 • : .
<0.50 •• • 10.27•
..
`0.50 . 114
<0.10 •• 11-10
<040 11.1.7
<0.50' • : • ' .114040
11-0. '
0.68 12.g'
1.59
<0.50 • 124i '••
<0.50 • ' 7 9'
•
•
' .450..
<04 . .
1.5
,ma.s0
2.28 '
<0,50a:• 'r
0.91'
<0.50 •
<0.0
40:50
<0. 0 •
A.50
<0.50 ' •
<0.-50 • •
40..
• {{+9 f
•
u.4 .A.. • •.. • ••
0.2O
(P. .4. ot5) •
•
•
.f¢:t$;klS:+'AWALZJ•: .:4
tW+11;t • `• ti

TOWN OF VALDESE TEL:[phone]
Mar 31,95 14:18 No,003 P.06
Nfl -N Effluent Concentrationb
1993
1-8
1.15
1-22
1-26
..212
249
. .
342
3-19
344
4-2
4-9
446
4-23.
4-30
$-14
5-21
5-28
6-4
641
b-18
6-Z5
7-2 . .
1.80
0,43
1.40
0.52
0.52
0.38
0.61
0.48
0.84
0.41
0.42
0.31
0.54
0.39
0.31
0,50
0.56
0.62
0.84
0.59
0.59
0.83
0.69
1.63
1.57
0.68 : •
Pale
7.9.
7.16
7-23
7-30
8-6
8-13
8-20.
8-25
9.3
9.1Q
9-17
9-24
10-1
10-8 ..:.. .
10-15
10-22
10-29. ,
11-5
11-12
11.19
11-24
12.3
12-10
12-16 .• .
12-23
12.31 , •.
•
0.57
0.77
0.60
0.50
0,68
0.71
0.61
0,A6
1.07
1,13
1.39
0.74
0.61
0.46
0.90
0.72
p,69
0.52
3.00
0.52
0.6q.'
0:67
0.68
0.44
0.61
0.52
(Page 5 •of 5)

DIVISION OF ENVIRONMENT MANAGEMENT
February 20, 1995
MEMORANDUM
TO: Susan Wilson
THRU: Ruth Swanek t2G?
Carla Sanderson
FROM: Jacquelyn M. NowellI
SUBJECT: Instream BOD Monitoring
Town of Valdese
NPDES Permit No. NC0041696
Burke County
Per your request, the Instream Assessment Unit has reviewed the necesssity of
instream monitoring for BOD5 for the Valdese facility. After a review of the daily
monitoring reports for 1994, the Instream Assessment Unit recommends deletion of the
instream monitoring requirement for BOD5. Data for 1994 shows that the monthly values
for downstream BOD range from 1.0 to 3.1 mg/l. This range of values would not appear
to predict any problems for the receiving stream.
If there are any questions, please contact me.
cc: Forrest Westall
Central Files
WLA File

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