NC0024911_Wasteload Allocation_19981112

NPDES DOCUMENT SCANNING COVER SHEET
NPDES Permit:
NC0024911
MSD Buncombe County WWTP
Document Type:
Permit Issuance
(Waste1oad
Allocation --
__,-
Authorization to Construct (AtC)
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Report
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Document Date:
November 12, 1998
This document is printed on reuse paper - ignore any -
loom -tent on the reirerse side

Re: MSD BUNCOMBE CO. ACUTE TOX TEST
Subject:
Date:
From:
Organization:
To:
CC:
Agreed.
Re: MSD BUNCOMBE CO. ACUTE TOX TEST
Thu, 12 Nov 1998 11:26:57 -0500
"Matt Matthews" <[e-mail]>
NC DENR/DWQ/ATU
Jackie Nowell<[e-mail]>
Steve Pellei<[e-mail]> ,
Keith Haynes <[e-mail]>
Jackie Nowell wrote:
Internal
> Hi Matt,
> Per our earlier conversation on the acute tox test for MSD. I looked
> back into the 1988 WLA done by Randy Dodd. Evidently at that time MSD
> had a discharge into a flume for a hydroelectric facility. The acute
> test was recommended for discharge into that flume where biological
> studies had documented a large fish population. There was no minimum
> flow requirement in the flume and there was concern from Randy and
> Trevor about protecting the fish there. There was a stipulation on the
> factsheet sent to ARO that if it was indicated that there was no
> evidence of impact on water quality or biota in the flume, the acute
> requirement could be removed. After it's initial inclusion in the 1989
> WLA, the acute test was included in 1995 renewal. With MSD's history of
> compliance and no evidence of water quality problems in the flume
> section, then the acute test can be deleted from the permit..
Matt Matthews
NC DENR/Division of Water Quality
Aquatic Toxicology Unit
4401 Reedy Creek Road
Raleigh, North Carolina 27607
v-[phone]
f-[phone]
MailTo:Matt [e-mail]
1 of 1 12/17/98 5:01 PM

MODEL RESULTS
Discharger : BUNCOMBE MSD
Receiving Stream : FRECH BROAD RIVER
SUMMER
32.8MGD AT 60 MG/L BOD5
BUNCOMBE MSD JOC
The End D.O. is 4.06 mg/l.
The End CBOD is 22.27 mg/l.
The End NBOD is 3.60 mg/1.
WLA WLA WLA
DO Min CBOD NBOD DO Waste Flow
(mg/1) Milepoint Reach # (mg/1) (mg/1) (mg/1) (mgd)
Segment 1 4.00 14.00 1
Reach 1 300.00 45.00 2.00 32.30000
Reach 2 0.00 0.00 0.00 0.00000

*** MODEL SUMMARY DATA ***
Discharger : BUNCOMBE MSD Subbasin : 040302
Receiving Stream : FRECH BROAD RIVER Stream Class: C
Summer 7Q10 : Winter 7Q10 :
Design Temperature: 23.
ILENGTHI SLOPE' VELOCITY 1 DEPTH' Kd I Kd I Ka 1 Ka I KN 1
I mile 1 ft/mil fps 1 ft Idesignl @204 Idesign l @204 Idesignl
I I 1 1 1 1 1 1 I
Segment 1 1 14.001 20.001 2.219 1 4.01 1 0.45 1 0.39 1 2.56 I 2.391 0.63
Reach 1 1 1 1 1 1 1 1 1 I
I I. 1 1 1 1 1 1 I
Segment 1 1 4.001 11.001 1.898 1 4.50 1 0.35 10.30 1 1.99 1 1.861 0.38
Reach 2 1 1 1 1 1 1 1 1 I
1 Flow 1 CBOD 1 NBOD 1 D.O. I
1 cfs 1 mg/1 1 mg/1 1 mg/1 1
Segment 1 Reach 1
Waste 1 50.065 1300.000 1 45.000 1 2.000
Headwaters1466.000 1 2.000 1 1.000 I 6.500
Tributary 1 0.000 1 2.000 1 1.000 I 7.720
* Runoff 1 2.670 1 2.000 1 1.000 I 7.720
Segment 1 Reach 2
Waste 1 0.000 1 0.000 1 0.000 I 0.000
Tributary 1 17.000 1 2.000 1 1.000 I 7.720
* Runoff 1 2.670 1 2.000 1 1.000 1 7.720
* Runoff flow is in cfs/mile

I Seg
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
I Seg # I
# I Reach #
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
2
2
2
2
2
2
2
2
Reach #
I Seg Mi I
0.00
0.50
1.00
1.50
2.00
2.50
3.00
3.50
4.00
4.50
5.00
5.50
6.00
6.50
7.00
7.50
8.00
8.50
9.00
9.50
10.00
10.50
11.00
11.50
12.00
12.50
13.00
13.50
14.00
14.00
14.50
15.00
15.50
16.00
16.50
17.00
17.50
18.00
I Seg Mi I
D.O.
6.06
5.92
5.78
5.64
5.52
5.40
5.29
5.18
5.08
4.99
4.90
4.81
4.73
4.66
4.59
4.52
4.46
4.40
4.35
4.30
4.25
4.21
4.17
4.14
4.10
4.07
4.04
4.02
4.00
4.11
4.10
4.09
4.08
4.08
4.07
4.07
4.07
4.06
D.O.
I CBOD
30.91
30.64
30.38
30.12
29.86
29.61
29.36
29.11
28.86
28.61
28.37
28.13
27.89
27.65
27.42
27.19
26.96
26.73
26.50
26.28
26.06
25.84
25.62
25.40
25.19
24.98
24.77
24.56
24.36
23.69
23.51
23.33
23.15
22.97
22.79
22.62
22.45
22.27
I CBOD
SUMMER
32.8MGD AT 60 MG/L BOD5
BUNCOMBE MSD JOC
I NBOD I Flow I
5.27 516.07
5.21 517.40
5.16 518.74
5.10 520.07
5.05 521.41
4.99 522.74
4.94 524.08
4.89 525.41
4.84 526.75
4.78 528.08
4.73 529.42
4.68 530.75
4.63 532.09
4.58 533.42
4.54 534.76
4.49 536.09
4.44 537.43
4.39 538.76
4.35 540.10
4.30 541.43
4.26 542.77
4.21 544.10
4.17 545.44
4.12 546.77
4.08 548.11
4.04 549.44
4.00 550.78
3.95 552.11
3.91 553.45
3.83 570.45
3.80 571.78
3.77 573.12
3.74 574.45
3.71 575.79
3.68 577.12
3.65 578.46
3.62 579.79
3.60 581.13
I NBOD I Flow I

MODEL RESULTS
Discharger : BUNCOMBE MSD
Receiving Stream : FRECH BROAD RIVER
SUMMER
40 MGD AT 45 MG/L BOD5
SUMMER
The End D.O. is 4.19 mg/1.
The End CBOD is 20.42 mg/l.
The End NBOD is 4.22 mg/1.
WLA WLA WLA
DO Min CBOD NBOD DO Waste Flow
(mg/1) Milepoint Reach # (mg/1) (mg/1) (mg/1) (mg(i)
Segment 1 4.11 14.00 1
Reach 1 225.00 45.00 2.00 40.00000
Reach 2 0.00 0.00 0.00 0.00000

*** MODEL SUMMARY DATA ***
Discharger : BUNCOMBE MSD Subbasin : 040302
Receiving Stream : FRECH BROAD RIVER Stream Class: C
Summer 7Q10 : Winter 7Q10 :
Design Temperature: 23.
!LENGTH' SLOPE! VELOCITY 1 DEPTH' Kd 1 Kd 1 Ka 1 Ka 1 KN 1
I mile 1 ft/mil fps 1 ft Idesign l @204 Idesign l @204 Idesign'
I I 1 1 1 1 1 1 I
Segment 1 1 14.001 20.001 2.256 1 4.02 1 0.45 1 0.39 12.57 1 2.401 0.63
Reach 1 1 1 1
I I 1 1 1 1 1 1 I
Segment 1 1 4.001 11.001 1.928 1 4.51 1 0.35 1 0.30 1 2.00 1 1.871 0.38
Reach 2 1 1 1 1 1 1 1 1 I
1 Flow 1 CBOD 1 NBOD 1 D.O. 1
1 cfs 1 mg/1 1 mg/1 1 mg/1 I
Segment 1 Reach 1
Waste 1 62.000 1225.000 1 45.000 1 2.000
Headwaters1466.000 1 2.000 I 1.000 1 6.500
Tributary 1 0.000 1 2.000 1 1.000 I 7.720
* Runoff 1 2.670 1 2.000 1 1.000 I 7.720
Segment 1 Reach 2
Waste 1 0.000 1 0.000 1 0.000 1 0.000
Tributary 1 17.000 1 2.000 1 1.000 1 7.720
* Runoff 1 2.670 1 2.000 1 1.000 1 7.720
* Runoff flow is in cfs/mile

I Seg
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
I Seg
# I Reach
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
2
2
2
2
2
2
2
2
# I Reach
# I Seg Mi I
0.00
0.50
1.00
1.50
2.00
2.50
3.00
3.50
4.00
4.50
5.00
5.50
6.00
6.50
7.00
7.50
8.00
8.50
9.00
9.50
10.00
10.50
11.00
11.50
12.00
12.50
13.00
13.50
14.00
14.00
14.50
15.00
15.50
16.00
16.50
17.00
17.50
18.00
# I Seg Mi I
D.O. I
5.97
5.84
5.71
5.59
5.48
5.37
5.27
5.17
5.08
4.99
4.91
4.84
4.77
4.70
4.64
4.58
4.52
4.47
4.42
4.38
4.34
4.30
4.26
4.23
4.20
4.17
4.15
4.13
4.11
4.21
4.21
4.20
4.20
4.19
4.19
4.19
4.19
4.19
D.O. 1
CBOD
28.19
27.95
27.71
27.48
27.25
27.02
26.79
26.57
26.34
26.12
25.90
25.69
25.47
25.26
25.05
24.84
24.63
24.43
24.22
24.02
23.82
23.62
23.43
23.23
23.04
22.85
22.66
22.47
22.29
21.70
21.53
21.37
21.21
21.05
20.89
20.73
20.57
20.42
CBOD
SUMMER
40 MGD
SUMMER
NBOD I
6.17
6.10
6.04
5.97
5.91
5.85
5.79
5.72
5.66
5.61
5.55
5.49
5.43
5.37
5.32
5.26
5.21
5.15
5.10
5.05
4.99
4.94
4.89
4.84
4.79
4.74
4.69
4.64
4.59
4.49
4.45
4.42
4.39
4.35
4.32
4.29
4.25
4.22
NBOD I
AT 45 MG/L BOD5
Flow I
528.00
529.34
530.67
532.01
533.34
534.68
536.01
537.35
538.68
540.02
541.35
542.69
544.02
545.36
546.69
548.03
549.36
550.70
552.03
553.37
554.70
556.04
557.37
558.71
560.04
561.38
562.71
564.05
565.38
582.38
583.72
585.05
586.39
587.72
589.06
590.39
591.73
593.06
Flow I

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North Carolina Department of Environment,
Health, and Natural Resources
Printed on Recycled Paper

DIVISION OF ENVIRONMENTAL MANAGEMENT
May 23, 1990
MEMORANDUM
TO: Max Haner
THROUGH: Trevor Clements
FROM: Ruth Swanek 'WC3
SUBJECT: Proposed JOC Amendment (JOC #88-26 AdII)
Metropolitan Sewerage District of Buncombe County
NPDES No. NC0024911
I have reviewed the proposed JOC amendment for Buncombe
County's MSD WWTP (NC0024911), and a Level B modeling analysis
indicates that the increased flow will have no detrimental impacts
to the instream dissolved oxygen (DO) concentration. The permitted
TSS and fecal coliform loadings will also decrease under the pro-
posed amendment, and the interim limits should be granted.
A review of the facility's toxicity data indicate:;
facility is passing its chronic toxicity tests on a consistent
basis. However, the facility is failing the acute tests which were
included in the permit to protect the fish which inhabit the hydro-
power flume where the discharge occurs. Staff of the Environmental
Sciences Branch believe that the results of the chronic tests war-
rant the addition of either domestic or industrial wastewater.
However, both chronic and acute toxicity testing should continue.
If you have any questions, please call me.
cc: Kent Wiggins
Steve Tedder

State of North Carolina
Department of Natural Resources and Community Development
Asheville Regional Office
James G. Martin, Governor Ann B. Orr
William W. Cobey, Jr., Secretary Regional Manager
MEMORANDUM
TO:
Enforcement and Emergency Manageme
Kent Wiggins, Coordinator
Through: Roy M. Davis, Regional Supery
Division of Environmental M
Forrest R. Westall
Regional Water Quali r, .: -.visor / ARO
From: Max L. Haner, Environmental Chemist-0
Water Quality Section / ARO
00C"
Subject: Comments and Recommendation
Proposed JOC Amendment (JOC #88-26 AdII)
MSD of Buncombe County
NPDES Permit No. NC0024911
DIVISION OF ENVIRONMENTAL MANAGEMENT
WATER QUALITY SECTION
May 16, 1990 VFDt
RECEIVED
MAY 1 71990
TEcNtlicA . :NNW BRAMCH
Completion of construction of MSD's (Buncombe County) RBC system with
primary and secondary microscreens will be in accordance with the
compliance schedule contained in the existing JOC #88-26 Ad (July 1,
1990). Compliance with final secondary effluent limitations for BOD and
TSS will not be attained, however, due to an unforeseen inability of the
secondary screens to accept flows from the RBC units with peak TSS
concentrations as high as 240 mg/l. The proposed JOC amendment
(attached) for MSD of Buncombe County (NPDES Permit No NC0024911) was
developed to allow construction of intermediate clarifiers to reduce the
TSS concentration to the secondary microscreens to a relatively constant
60 mg/1, thus allowing the 21 micron microscreens to operate as
designed. The intermediate clarifiers will be designed and constructed
by ENVIREX, INC., source supplier for the microscreen systems. No
public money will be involved in this project. Construction is proposed
to be completed July 31, 1991, with final compliance by December 31,
1991. The current JOC expires December 31, 1990.
Interchange Building, 59 Woodfin Place, Asheville, N.C. 28801 • Telephone [phone]
An Equal Opportunity Affirmative Action Employer

Kent Wiggins
Memorandum
May 16, 1990
Page Two
Until completion of this project, 74 and 149 micron microscreens will be
intermixed with the 21 micron microscreens (project design) such that
interim limits as proposed in this JOC amendment (Attachment A) can be
met. Attachment A shows a 40 MGD flow, 45mg/1 BOD, 60 mg/1 TSS, and
1000/100 ml Fecal Coliform, representing a change from the existing
limits of 32.3 MGD flow, 60 mg/1 BOD, 75 mg/1 TSS and 10,000/100 ml
Fecal Coliform. As the proposed change in interim limits for BOD and
TSS do not increase the total number of pounds per day for either
parameter, it is anticipated that a second instream analysis will not be
required. By copy of this memo, I am requesting that the Technical
Support Branch to review the interim limits in this proposed JOC
amendment and comment appropriately.
In a meeting on March 30, 1990, MSD demonstrated that compliance with
the completed facility would not meet final secondary limitations and
that the proposed interim limits were both reasonable and necessary. As
indicated, ENVIREX, INC., recognizes it responsibility in this matter
and it is currently preparing plans and specifications for the
intermediate clarifiers. In recommending the proposed amendment,
up -front penalties were thought to be inappropriate. Stipulated
penalties have been included in the amendment. A new 67(b) flow
allocation letter will be drafted for the Director immediately following
issuance of this JOC amendment.
Also, please note that the JOC amendment shows no changes in effluent
monitoring requirements which are consistent with the recently reissued
NPDES Permit.
It is recommended that the proposed JOC amendment be processed as
rapidly as possible Should you have questions or wish to discuss this
matter in more detail, please advise.
MLH
Enclosure
cc: Trevor Clements