NC0039446_Wasteload Allocation_19930105

NPDES DOCUMENT SCANNING COVER SHEET
NC0039446
Linville Resorts WWTP
NPDES Permit:
Document Type:
Permit IssssuNance
Wasteload Allocation
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Authorization to Construct (AtC)
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Correspondence
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Document Date:
January 5, 1993
This document its printed on reusce paper - ignore any
content 0n the reiirerse side

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PERMIT NO.: NC0039446
PERMI ITEE NAME:
FACILITY NAME:
Linville Resorts
NPDES WASTE LOAD ALLOCATION
Linville Resorts WWTP
Facility Status: Existing
Permit Status: Modification
Major Minor 'J
Pipe No.: 001
Design Capacity: 0.100 MGD
Domestic (% of Flow): 100 %
Industrial (% of Flow):
Comments:
proposed expansion from 0.050 to 0.100 MGD.
111-29-(1)1
RECEIVING STREAM:Linville River
Class: C-Trout
Sub -Basin: 03-08-30
Reference USGS Quad: C 11 SE (please attach)
County: Avery
Regional Office: Asheville Regional Office
Previous Exp. Date: 2/28/94 Treatment Plant Class:
Classification changes within three miles:
Requested by: /) Charles Lowe Date: 10/9/92
Prepared by: �(ac S /1 Date: i
Reviewed Date: ( 4f -3
�boQ 71om. 25s
/3o•S-w
S
Modeler
I Date Rec.
#
... 003
to\ci z—
11 4-3
Drainage Area (mi` ) 5. '7 Avg. Streamflow (cfs): /3,'7
7Q10 (cfs) ,1, , Winter 7Q10 (cfs) 3.• i` 30Q2 (cfs) T. 7
Toxicity Limits: IWC %
Instream Monitoring:
Parameters
Acute/Chronic
Upstream Location
Downstream Location
Effluent
Characteristics
Summer
Winter
BOD5 (mg/l)
30
3a
NH3-N (mg/1)
6.5 (l-f-()
/ 7 (AT)
D.O. (mg/1)
n f
4r-
TSS (mg/1)
30
)0
F. Col. (/100 ml)
2 .
pH (SU)
--ci
6 — 9
1
L P
Al
a, ,
PLOTTED
Comments:- '
refer: Basinwide / Streamline WLA file
at front of subbasin

1
,

EVALUATION OF WASTEWATER DISPOSAL ALTERNATIVES
Linville Resorts, Incorporated
Avery County, North Carolina
I. General Information
A. - Linville Resorts, Incorporated Wastewater Treatment Plant
NPDES Permit No. NC0039446
- Avery County
- NC 181 and US 221, North of Linville
Linville, North Carolina 28646
- Prepared By: Danny B. Bridges
- North Carolina P.E. Certification No. 16732
- McGill Associates, P.A.
Post Office Box 2259
Asheville, North Carolina 28801
Telephone: [phone]
FAX: [phone]
B. Proposed Facilities: Briefly, the proposed improvements consist of replacing the existing
WWTP with a 100,000 GPD package type plant, which includes flow equalization, two (2)
aeration basins, two (2) clarifiers, an aerobic digestor, and chlorination facilites. A new
influent pump station is also proposed. Dechlorination will be performed by utilizing the
existing setup. See Exhibit A, Proposed Wastewater Treatment Flow Diagram.
C. This project serves Linville Resorts, Inc., a private residential resort community. Currently
there are approximately 90 homes, 4 restaurants, a lodge and a motel served by the
Wastewater System. Actual flows experienced at the existing WWTP are in excess of
50,000 GPD during peak vacation season.
D. The project is not phased and will only add customers as they abandon private septic
systems.
II. Evaluation of Environmentally Feasible Discharge Alternatives
A. Evaluation of the Following Three Alternatives:
1. Connection To Sewerage System
a. There is no other existing sewerage system within five (5) miles.
b. There is no area wide sewerage system planned within a five (5) mile radius
within five years.

2. Subsurface Disposal System
a. Septic Tank and Drainfield System
This alternative would consist of a system of 8-inch gravity sewer collection lines
which would initially carry wastewater to a septic tank and distribution box.
The wastewater would then be distributed through a series of underground drain
lines and absorption trenches where the wastewater would be disposed of
underground. This system is similar to an individual home septic tank and
drainfield system, except, of course, for size.
An absorption rate of 0.5 gal/ft. /day is typical for this area of North Carolina,
however, the permitted absorption rate would be determined by the State of
North Carolina Department of Environmental Management in conjunction with
the local health department.
Based on the above absorption rate, an area of 40 acres would be required to
treat the wastewater flows contributed from the resort area. This area includes
a "repair area" which is completely undisturbed area equal in size to the area
designated for the drainfield system. The above area also takes into
consideration the State criteria for length of drain lines, spacing between drain
lines, trench width and all other aspects of design.
Linville Resorts does not currently own 40 acres of suitable, level land and an
adjacent tract of land does not exist with suitable area and topography to utilize
this system.
3. Spray Irrigation System
a. Currently, Linville Resorts, Inc. does not own sufficient land that is
topographically suitable for a spray irrigation system.
B. None of the three alternatives are environmentally feasible.
C. Environmental Feasibility of Stream Discharge
1. The gravity outfall will be approximately 200 feet to the Linville River (The current
WWTP is located at the same site, therefore the same discharge point will be used.)
See Attached Exhibit B.
2. No easements or land acquisitions are required since Linville Resorts owns all of
the necessary property.
III. Economic Analysis
Since the only feasible alternative to treat this flow is by discharging treated effluent to a stream, an
economic analysis is not needed.

McGILL ASSOCIATES, P.A.
JOB Llr—IVIL-_!; G. W T IMPReWFr
SHEET NO. OF I
DATE J I %IC1 Z
CALCULATED BY 1 (Z'
CONSULTING ENGINEERS
3B ORANGE STREET
ASHEVILLE, N.C. 28801
704/252-0575
P.O. BOX 226E
ABHEVILLE, N.C. 28802
DESCRIPTION -Ei4 t1 I I T A
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PROJECT NO di 131
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EXHIBIT B
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Facility Name:
NPDES No.:
Type of Waste:
Facility Status:
Permit Status:
Receiving Stream:
Stream Classification:
S ubbasin:
County:
Regional Office:
Requestor:
Date of Request:
Topo Quad:
FACT SHEET FOR WASTELOAD ALLOCATI
Linville Resorts WWTP
NC0039446
Domestic - 100%
Existing
Modification
Linville River
C-Trout
030830
Avery
Asheville
Lowe
10/9/92
C11SE
Wasteload Allocation Summary
(approach taken, correspondence with region, EPA, etc.)
Facility requesting modification of existing permit for expansion from 0.050 MGD to 0.100 MGD.
Technical Support recommends approval of expansion however Linville Resorts interacts with
Grandfather Golf and Country Club and NH3 toxicity limits for both facilities are affected.
Request #
ECEO
DEC 7 1992
icatF REGIONAL OFFICE
Stream Characteristic:
USGS #
Date:
Drainage Area (mi2):
Summer 7Q10 (cfs):
Winter 7Q10 (cfs):
Average Flow (cfs):
30Q2 (cfs):
IWC (%):
5.7
2.2
3.4
13.7
4.7
7%
.7)
Special Schedule Requirements and additional comments from Reviewers:
ot- AV, F4gi isy c�(ri u / b.:1 1.p/WAhs..,L n)i/� J,'...i-t /%f/es/
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FIn.vnnx) A.npns i& 6-c f'. f�.G ,e.c / �� /99T�'
Recommended by:
Reviewed by
Instream Assessme t:
Regional Su
Permits & Engineering:
Date:_11/23/92_
Date: (� l 2-
Date: / 24 9 (9
Date: (Z7&/ 7
3 1
RETURN TO TECHNICAL SERVICES BY: DEC 1992
•
J

2
Existing Limits:
Wasteflow (MGD):
BOD5 (mg/1):
NH3N (mg/1):
DO (mg/1):
TSS (mg/1):
Fecal Col. (/100 ml):
pH (SU):
Residual Chlorine (14/1):
Temperature (C):
TP (mg/1):
TN (mg/1):
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/l):
Temperature (C):
TP (mg/1):
TN (mg/1):
Limits Changes Due To:
Change in 7Q10 data
Change in stream classification
Relocation of discharge
Change in wasteflow
Other (onsite toxicity study, interaction, etc.)
Instream data
New regulations/standards/procedures
New facility information
CONVENTIONAL PARAMETERS
Monthly Average
Summer Winter
0.050
30
monitor
nr
30
1000
6-9
110
monitor
monitor
monitor
Monthly Average
Summer Winter
0.100 0.100
30 30
6.5 19
nr nr
30 30
200 200
6-9 6-9
28 28
monitor
monitor
monitor
monitor
monitor
monitor
WQ or EL
EL
WQ,AT
Parameter(s) Affected
Fecal, Chlorine
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.
OR
No parameters are water quality limited, but this discharge may affect future allocations.

3
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
If no, which parameters cannot be met?
Would a "phasing in" of the new limits be appropriate? Yes No
If yes, please provide a schedule (and basis for that schedule) with the regional
office recommendations:
If no, why not?
Special Instructions or Conditions
Wasteload sent to EPA? (Major) _ _ (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 or N) If yes, explain with attachments.

State of North Carolina
Department of Environment, Health, and Natural Resources
Division of Environmental Management
P.O. Box-29535
Raleigh, NC 27626-0535
TELECOPY TO:
FAX NUMBER:
WATER QUALITY SECTION
FAX # [phone]
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linville resorts wwtp
AMMONIA ANALYSIS
7Q10: 2.2000 cfs
NH3 Effl. Conc: 2.8000 mg/1
AL (1/1.8 mg/1) : 1000.00 ug/1
Upstream NH3 Conc.: 220.0000 ug/1 Aps�Mf4L 03
Design Flow: 0.1000 MGD
Predicted NH3 Downstream: 389.81 ug/1
0.389808 mg/1
NH3 Limit: 12070.96 ug/1
12.07096 mg/1
4/7„,d
AMMONIA ANALYSIS (WINTER)
7Q10: 3.4000 cfs
NH3 Effl. Conc: 2.8000 mg/1
AL (1/1.8 mg/1) : 1800.00 ug/1 ��3
Upstream NH3 Conc.: 220.0000 ug/1 ezwin
Design Flow: 0.1000 MGD
Predicted NH3 Downstream: 332.49 ug/1
0.332489 mg/1
NH3 Limit: 36458.06 ug/1
36.45806 mg/1

-Discharger
Receiving Stream :
MODEL RESULTS
LINVILLE RESORTS WWTP
LINVILLE RIVER
SUMMER
MODEL PROTECTING FOR NH3 TOX
INTERACTION/GGCC & LINVL RSORT
The End D.O. is
The End CBOD is
The End NBOD is
7.98
5.11
2.93
mg/l.
mg/1.
mg/1.
DO Min
WLA
CBOD
(mg/1) Milepoint Reach # (mg/1)
Segment 1 . 7.04
Reach 1
Reach 2
0.00 1
45.00
45.00
WLA
NBOD
(mg/ 1)
41.40
29.25
WLA
DO Waste Flow
(mg/1) (mgd)
0.00
0.00
0.07000
0.10000

*** MODEL SUMMARY DATA ***
Discharger : LINVILLE RESORTS WWTP Subbasin : 030830
Receiving Stream : LINVILLE RIVER Stream Class: C-TROUT
-Summer 7Q10 : 2.2 Winter 7Q10 : 3.4
Design Temperature: 25.0
ILENGTHI SLOPE' VELOCITY 1 DEPTH' Kd 1 Kd 1 Ka 1 Ka 1 KN 1
mile I ft/mil fps 1 ft Idesign l @204 Idesign l @204 Idesignl
I I 1
Segment '1 1 0.901 24.001 0.226 1 0.80 1 0.39 1 0.31 110.90 I 9.78) 0.73
Reach 1 1 I 1 I I I I I I
•
I I 1 1 1 1 1 1 I
Segment 1 1 2.001 30.801 0.263 10.79 1 0.44 1 0.35 16.28 1 14.601 0.73
Reach 2 1 1 1 1 I 1 I 1 I
I Flow I CBOD 1 NBOD I D.O. 1
cfs 1 mg/1 1 mg/1 I mg/1 I
Segment 1 Reach 1
Waste I 0.109 1 45.000 1 41.400 1 0.000
Headwaters) 1.900 1 2.000 I 1.000 1 7.440
Tributary 1 0.000 1 2.000 I 1.000 I 7.440
* Runoff I 0.330 I 2.000 1 1.000 1 7.440
Segment 1 Reach 2
Waste 1 0.155 1 45.000 1 29.250 1 0.000
Tributary 1 0.000 1 2.000 I 1.000 1 7.440
* Runoff 1 0.000 1 2.000 1 1.000 1 7.440
* Runoff flow is in cfs/mile

I
SUMMER
MODEL PROTECTING FOR NH3 TOX
INTERACTION/GGCC & LINVL RSORT
Seg # I Reach # I Seg Mi I D.O. I CBOD I NBOD I Flow I
1 1 0.00 7.04 4.32 3.18 2.01
1 1 0.10 7.26 4.24 3.09 2.04
1 1 0.20 7.43 4.16 2.99 2.07
1 1 0.30 7.55 4.08 2.90 2.11
1 1 0.40 7.65 4.01 2.82 2.14
1 1 0.50 7.72 3.94 2.73 2.17
1 1 0.60 7.77 3.87 2.66 2.21
1 1 0.70 7.81 3.80 2.58 2.24
1 1 0.80 7.84 3.73 2.51 2.27
1 1 0.90 7.87 3.67 2.44 2.31
1 2 0.90 7.37 6.27 4.13 2.46
1 2 1.00 7.54 6.21 4.06 2.46
1 2 1.10 7.66 6.15 3.99 2.46
1 2 1.20 7.74 6.08 3.92 2.46
1 2 1.30 7.80 6.02 3.85 2.46
1 2 1.40 7.84 5.96 3.79 2.46
1 2 1.50 7.87 5.90 3.72 2.46
1 2 1.60 7.89 5.84 3.66 2.46
1 2 1.70 7.90 5.78 3.60 2.46
1 2 1.80 7.92 5.72 3.54 2.46
1 2 1.90 7.93 5.66 3.48 2.46
1 2 2.00 7.93 5.61 3.42 2.46
1 2 2.10 7.94 5.55 3.36 2.46
1 2 2.20 7.95 5.49 3.31 2.46
1 2 2.30 7.95 5.44 3.25 2.46
1 2 2.40 7.96 5.38 3.19 2.46
1 2 2.50 7.96 5.33 3.14 2.46
1 2 2.60 7.97 5.27 3.09 2.46
1 2 2.70 7.97 5.22 3.03 2.46
1 2 2.80 7.97 5.17 2.98 2.46
1 2 2.90 7.98 5.11 2.93 2.46
Seg # I Reach # I Seg Mi I D.O. I CBOD I NBOD I Flow I