NC0058891_Denial_19890630

NPDES DOCUMENT SCANNING COVER SHEET
NC0058891
Valley Creek WWTP
NPDES Permit:
Document Type:
Permit Issuance
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Correspondence
Owner Name Change
Denial
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Document Date:
June 30, 1989
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State of North Carolina
Department of Natural Resources and Community Development
Division of Environmental Management
512 North Salisbury Street • Raleigh, North Carolina 27611
James G. Martin, Governor R. Paul Wilms
William W. Cobey, Jr., Secretary Director
June 30, 1989
CERTIFIED MAIL
RETURN RECEIPT REQUESTED
Mr. Robert A. Kent
P. 0. Box 1236
Blowing Rock, NC 28605
Tear Mr. Kent:
Off- OZ-D t
SUBJECT: Permit Modification Denial
NPDES Permit Application NC0058891
Robert A. Kent
Watauga County
VALL.E.0 Greet --
Your application for a NPDES permit to discharge 0.900 MGD of treated wastewater
into Valley Creek from a wastewater treatment facility located on NCSR 1511 near
Foscoe in Watauga County was received on October 25, 1988. Our Asheville Regional
Office has as performed a site investigation, and the Division has completed its
review of the permit application.
Based on this review, the subject permit was sent to public notice with the
intent to issue. Sufficient comment was received during the public notice period that
a public meeting was scheduled and held on May 25, 1989.
As a result of the public meeting, a determination has been made that the
expansion to 0.9 MGD may result in instream temperature violations in Valley Creek.
Therefore, your request to expand the facility to 0.900 MGD is hereby denied due
to the fact that instream temperature violations could occur if this additional
wastewater is discharged into Valley Creek. However, the subject permit will be
renewed at the present flow of 0.01 MGD. This permit will be forwarded to you under
separate cover. Once sufficient instream data has been collected to allow the
Division to better, predict temperature, you may resubmit your request for permit
expansion.
If this denial in unacceptable to you, you have the right to an adjudicatory
hearing upon written request within thirty (30) days following receipt to this
denial. This request must be in. the form of a written petition conforming to Chapter
150B of the N. C. General Statutes, and filed with the Office Administrative Hearing,
P. 0. Drawer 11666, Raleigh, NC 27604.
Continued. .
Pollution Prevention Pays
P.O. Box 27687, Raleigh, North Carolina 27611-7687 Telephone [phone]
An Equal Opportunity Affirmative Action Employer

Page 2
Mr. Kent
If you have any questions on this permit denial, please contact Mr. Art►ur
Mouberry of my staff at telephone number 919/7..33-5083.
cc:
Asheville Regional Office
Technical Support
Office Legal Affair
EPA
Larry Coble
Permit File
Sinc're1y,
R. Paul Wilms

•
DIVISION OF ENVIRONMENTAL MANAGEMENT
June 7, 1989
MEMORANDUM
TO: Larry Coble
THROUGH: Tom Stockton v
Trevor ClementsrZ
FROM: Ruth Clark kW.
SUBJECT: Effect of Dischargers on Temperature
Valley Creek - Watauga River Basin - Watauga County
NC0058891 and NC0075761
I have enclosed the results of several mass balances to det-
ermine the impact of the above dischargers on the temperature of
Valley Creek. Since no ambient or effluent temperature data were
available, the mass balances were performed at a variety of tem-
peratures. Effluent temperatures of 15, 20, and 25°C at ambient
temperatures ranging from 10 to 20°C were used. The attached
effluent data from the Country House Village located near the
mouth of Valley Creek (NC0033448, design flow = 0.005 mgd, 100%
domestic) indicate that the effluent temperature will probably be
below 20° C assuming similar treatment. I have also included
ambient data from Wilson Creek at Highway 221.:.(02140304). At the
ambient station, the stream is characterized by a 7Q10 of 0.3 cfs,
an average flow of 1.8 cfs, and an elevation of 4000 feet. Valley
Creek at the Kent -West Development is characterized by a 7Q10 of
0.3 cfs, an average flow of 2.2 cfs, and an elevation of 3400
feet. Since the physical characteristics of the streams are sim-
ilar, the temperatures may be similar. Therefore the average sum-
mer temperature of Valley Creek is probably approximately 14° C.
The results indicate that the proposed Village Cafe
(NC0075761, design flow = .0075 MGD) and the existing Kent -West
Development (NC0058891, design flow = 0.01 MGD) will have little
impact on the instream temperature. If Kent -West Development
increases its flow to 0.9 mgd, there is a high probability that
the discharge will change the instream temperature by more than
0.5 C° at 7Q10 conditions. This would violate the instream tem-
perature standard for trout waters.
Due to a lack of instream temperature data, a temperature
model was not developed to analyze the interaction of the two
facilities.
If I can be of further assistance, please call me at (919)
733-5083.
CC:
Peter Nathanson
Kent -West Development WLA File
The Village Cafe WLA File

Predicted Temperature in Valley Creek at Mixing Zone
Ambient
Temp
(C)
10
11
12
13
14
15
16
17
18
19
20
Predicted
Temp
(C)
10.19
11.15
12.11
13.07
14.04
15.00
15.96
16.93
17.89
18.85
19.81
Qw (mgd)=
Qw (cfs)=
Qup (cfs) =
Qd (cfs)=
Waste Temp =
0.0075
0.0116
0.3
0.3116
15
Qw = Waste Flow
Qup = Upstream Flow
Qd = Downstream Flow
Waste Temp = Effluent Temperature in C

Ambient
Temp
(C)
10
11
12
13
14
15
16
17
18
19
20
Predicted Temperature in Valley Creek at Mixing Zone
Predicted
Temp
(C)
10.37
11.34
12.30
13.26
14.22
15.19
16.15
17.11
18.07
19.04
20.00
Qw (mgd)=
Qw (cfs)=
Qup (cfs) =
Qd (cfs)=
Waste Temp =
0.0075
0.0116
0.3
0.3116
20
Qw = Waste Flow
Qup = Upstream Flow
Qd = Downstream Flow
Waste Temp = Effluent Temperature in C

Predicted Temperature in Valley Creek at Mixing Zone
Ambient Predicted
Temp Temp
(C) (C)
10 10.56 Qw (mgd)= 0.0075
11 11.52 Qw (cfs)= 0.0116
12 12.48 Qup (cfs) = 0.3
13 13.45 Qd (cfs)= 0.3116
14 14.41 Waste Temp = 25
15 15.37
16 16.34
17 17.30
18 18.26
19 19.22
20 20.19
Qw = Waste Flow
Qup = Upstream Flow
Qd = Downstream Flow
Waste Temp = Effluent Temperature in C

Ambient
Temp
(C)
10
11
12
13
14
15
16
17
18
19
20
Predicted Temperature in Valley Creek at Mixing Zone
Predicted
Temp
(C)
10.25
11.20
12.15
13.10
14.05
15.00
15.95
16.90
17.85
18.80
19.75
Qw (mgd)=
Qw (cfs)=
Qup (cfs) =
Qd (cfs)=
Waste Temp =
0.01
0.0155
0.3
0.3155
15
Qw = Waste Flow
Qup = Upstream Flow
Qd = Downstream Flow
Waste Temp = Effluent Temperature in C

Ambient
Temp
(C)
10
11
12
13
14
15
16
17
18
19
20
Predicted Temperature in Valley Creek at Mixing Zone
Predicted
Temp
(C)
10.49
11.44
12.39
13.34
14.29
15.25
16.20
17.15
18.10
19.05
20.00
Qw (mgd)=
Qw (cfs)=
Qup (cfs) =
Qd (cfs)=
Waste Temp =
0.01
0.0155
0.3
0.3155
20
Qw = Waste Flow
Qup = Upstream Flow
Qd = Downstream Flow
Waste Temp = Effluent Temperature in C

Predicted Temperature in Valley Creek at Mixing Zone
Ambient Predicted
Temp Temp
(C) (C)
10 10.74
11 11.69
12 12.64
13 13.59
14 14.54
15 15.49
16 16.44
17 17.39
18 18.34
19 19.29
20 20.25
Qw (mgd)=
Qw (cfs)=
Qup (cfs) =
Qd (cfs)=
Waste Temp =
0.01
0.0155
0.3
0.3155
25
Qw = Waste Flow
Qup = Upstream Flow
Qd = Downstream Flow
Waste Temp = Effluent Temperature in C

Ambient
Temp
(C)
10
11
12
13
14
15
16
17
18
19
20
Predicted Temperature in Valley Creek at Mixing Zone
Predicted
Temp
(C)
14.12
14.29
14.47
14.65
14.82
15.00
15.18
15.35
15.53
15.71
15.88
Qw (mgd)=
Qw (cfs)=
Qup (cfs) =
Qd (cfs)=
Waste Temp =
0.9
1.3950
0.3
1.6950
15
Qw = Waste Flow
Qup = Upstream Flow
Qd = Downstream Flow
Waste Temp = Effluent Temperature in C

Ambient
Temp
(C)
10
11
12
13
14
15
16
17
18
19
20
Predicted Temperature in Valley Creek at Mixing Zone
Predicted
Temp
(C)
18.23
18.41
18.58
18.76
18.94
19.12
19.29
19.47
19.65
19.82
20.00
Qw (mgd)=
Qw (cfs)=
Qup (cfs) =
Qd (cfs)=
Waste Temp =
0.9
1.3950
0.3
1.6950
20
Qw = Waste Flow
Qup = Upstream Flow
Qd = Downstream Flow
Waste Temp = Effluent Temperature in C

Ambient
Temp
(C)
10
11
12
13
14
15
16
17
18
19
20
Predicted Temperature in Valley Creek at Mixing Zone
Predicted
Temp
(C)
22.35
22.52
22.70
22.88
23.05
23.23
23.41
23.58
23.76
23.94
24.12
Qw (mgd)=
Qw (cfs)=
Qup (cfs) =
Qd (cfs)=
Waste Temp =
0.9
1.3950
0.3
1.6950
25
Qw = Waste Flow
Qup = Upstream Flow
Qd = Downstream Flow
Waste Temp = Effluent Temperature in C

/
PERMIT--NCO833448 PIPE--OOi
FACILITY --COUNTRY HOUSE VILLAGE WWTP
LOCATION-rBANNER ELK
REPORT PERIOD; 8805-8904 LOC--- E
DESIGN FLOW-- .0050 CLASS--i
REGION/COUNTY--01 WATAUGA
50050 0000 00530 00610 31616 50060 00010 OO4OO
MONTH Q/MGD BOD RE%/T%% NH3+NH4- FEC COLI CHLORINE TEMP PH
LIMIT
88/O5
F
.0050 F 30.00 F 30.0 NOL F 1000.0 F .O8O NOL 9.0 6.0
.0040 2.10 5.1 LE%%THAN .O .00O 14.40 6.7-6.7
88/06 .0050 i2.30 4.0 2.20 .O .0O8 16.60 6.8-6.8
88/07 .0050 3.60 1.2 .20 .O .00O 19.00 6.9-6.9
88/O8
.0050 20.40 20.7 10.30 344.0 .00O 18.00 6.9-6.8
88/09 .0025 13^20 ii.5 10.30 316.0 .00O 17.70)
'
88/10 .0045 5.70 2.9 LE%%THAN 6^0 .800 15.00 6.8-6.8
88/ii .0010 1.20 3.2 .20 4.0 .00O 14.80 6.7-6.5
88/12 .0030 3.00 13.2 LE%%THAN .O .000 9.00 6.7-6.7
89/01 .0045 3.00 3.7 .20 .O .008 10.00 6.8-6.6
�
89/02 .0020 3.90 11.7 .iO 4.0 .00O 10.00 7.0-6.9
89/03 .002 1.20 LE%%THAN LE%%THAN .O .00O i4.50 6.7-6.6
AVERAGE i0034 6.32 7.7 3.35 6i.2 .00O 14.45 ________
MAXIMUM .0050 20.40 20.7 10.30 344.0 ________ 19.00 7.200
MINIMUM .0010 1.20 LE%%THAN LE%%THAN .0 ^OOO 9.00 6.500
UNIT MGD MG/L MG/L MG/L 0/100ML MG/L DEG.0 %U

900 .3
06/06/89 LCCC.
09:57:00
549 7998
-9 STORET RETRIEVAL FATE 89106/06
650 C1370000 CfB0311A 02140304
651 34 05 49.0 081 48 28.0 1
652 WILSON CREEK NEAR GRA :J ?;;;
653 37011 Nt RT;-1 CA OLIrA
654 S0 J T HEAST
655 CATAWBA r i t A 41;:.ri)1 _TREA ;i'3/RACK
656 21NCCiwc 750811 HO 030. i0 03 3020..2C OFF
657 0001 FEET DEPTH
653
659 000 0 C 0: _ . .
660 DATE 00 EAT:F
,6:: FROM TEMP
662 TC /L CENT PEEC.E
463
664 622107/ _4 0620 2,40000 14, C1000 61.0000
665 82/08/17 0900 6.60)00 14.0000 63,0000
�ryy /±y j0350 3.90000 3.0 i0
666 O . ill/r a f})
667 82/10/07 1030 8.80000 15..0.. __....
668 83/07/27 1030 8,20000 15,0000
649 83/08/24 1100 8,30000 17:0000 26.....
470 83/09/133 0900 3.20000 16.0000 82,....
67! 63/10/24 0 9,50000 10.000004..
02 84/07130 1040 ..3..00 13,0000 87.. -:_
473 64/08/30 1108,600.0.3 15.0000 04,E1
674 84/09/21 1030 8,2 000 13.0000 78.301'
475 84/10/16 1015 9,50000 10.0000 55,1855
676 85/07/09 1045 7.00000 4.0000 87.0000
`' J0 1115.0 -.0;. '.
�r . `J J�%4 _ .:E j {, �_, uG.�hil{
�5 ,:� 1 0 f 0 56.0000
6' $ 4, {•'I, 1500 $.30{t:'_1 tti, j{ti;t,
579 85/10/29 1030 9.60000 9.00000 84.4327
680 886107/29 1115 7.5a000 18,0000 82.1052
681 86/06/21 1200 8,30000 16.0000 83„ j00:
682 R6/09/30 1200 8 +.f,0'j0 16.0000 81.0000
653 66/10/30 0923 10,0000 8.000084.0336
684 87/07/21 1145 8.20000 17.0000 84.5361
655 87/08/13 1115 5.80000 14.000C 84.6154
�, 7/ 1 - -t 0f15.0000 1
6f.. 3J [::°91 7 11�?i: 8,7U0��, 55..c94:
687 87/10/29 1200 5,90000 6,00000 79.2000
668 83/09/27 1130 9.60000 14.0000 92.2077
689 88110/56 1245 10.5000 7,00000 66.0456
690 00/00/00
691 STATION NUMBER 26 26 26
692 MAXIMUM 10.5000 18.0000 92.3077
693 MINIMUM 17.80003 6.00000 78.3019
694 MEAT: 8.87307 13.4423 54,1506
695 99/99/99 14 = me,d.o,()
696 STORET RETRIEVAL DATE 89/06/06
697 P
698 h1
699 H N
700 HUT
701 607011031
702 T y
703 1000000939599520401999999 ******** 77777777 3F
704 4000107020009 54999
705 4001 04001002 55000