NC0079481_Staff Report_19941013

SOC PRIORITY PROJECT: Yes No
IF YES, SOC NUMBER
TO: PERMITS AND ENGINEERING UNIT
WATER QUALITY SECTION
ATTENTION: Charles Alverez
DATE: October 13, 1994
. 9
NPDES STAFF REPORT AND RECOMMENDATION
COUNTY McDowell
PERMIT NUMBER NC0079481
PART I - GENERAL INFORMATION
1. Facility and Address: Harmony Estates, Inc .
17 Ellis Street
Marion, North Carolina 28752
2 . Date of Investigation: September 12, 1994
3 . Report Prepared By: Michael R. Parker
4 . Persons Contacted and Telephone Number: Charles Davis
704/327-2621
5. Directions to Site: From the intersection of North Carolina
Secondary Roads 1747 and 1765, travel west on approximately
0 . 75 mile . Turn into Harmony Estates drive and go to end of
driveway and find wastewater treatment plant .
6 . Discharge Point(s) , List for all discharge points:
Latitude: 35° 40' 28" Longitude: 80° 53 ' 49"
Attach a USGS map extract and indicate treatment facility site and
discharge point on map.
U.S.G.S. Quad No. El1NW U.S.G.S. Quad Name Marion East, N. C.
7 . Site size and expansion area consistent with application?
X Yes No If No, explain:
8 . Topography (relationship to flood plain included) :
Site is above flood plain.
Page 1

t
9 . Location of nearest dwelling: Approximately 300 feet
10 . Receiving stream or affected surface waters: Ut to North Muddy
Creek
a. Classification: C
b. River Basin and Subbasin No. : CTB 30
c. Describe receiving stream features and pertinent downstream
uses: fish and wildlife propagation, wading
PART II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1. a. Volume of wastewater to be permitted 0 . 020 MGD (Ultimate
Design Capacity)
b. What is the current permitted capacity of the Wastewater
Treatment facility? 0 . 040 MGD
c. Actual treatment capacity of the current facility (current
design capacity 0 . 020 MGD
d. Date (s) and construction activities allowed by previous
Authorizations to Construct issued in the previous two years:
e. Please provide a description of existing or substantially
constructed wastewater treatment facilities: The existing
wastewater treatment facilities consist of a bar screen, 8000
gallon flow equalization tank, dual 85 gpd grinder pumps and
high water alarm, aeration tank, clarifier, sludge holding
tank, chlorination and dechlorination facilies and flow
measuring and totalizing equipment .
f. Please provide a description of proposed wastewater treatment
facilities:
g. Possible toxic impacts to surface waters: NA
h. Pretreatment Program (POTWs only) :
in development approved
should be required not needed
2 . Residuals handling and utilization/disposal scheme:
a. If residuals are being land applied, please specify DEM
Permit Number
Residuals Contractor
Telephone Number
b. Residuals stabilization: PSRP PFRP OTHER
Page 2

,
c. Landfill:
d. Other disposal/utilization scheme (Specify) : Solids will be
removed by a licensed septic tank hauler.
3 . Treatment plant classification (attach completed rating sheet) :
Class II .
4 . SIC Codes (s) : 4952
Wastewater Code (s) of actual wastewater, not particular facilities
i .e. , non-contact cooling water discharge from a metal plating
company would be 14, not 56 .
Primary 05 Secondary
Main Treatment Unit Code: 06007
PART III - OTHER PERTINENT INFORMATION
1. Is this facility being constructed with Construction Grant Funds
or are any public monies involved. (municipals only) ?
2 . Special monitoring or limitations (including toxicity) requests:
3 . Important SOC, JOC, or Compliance Schedule dates: (Please
indicate)
Date
Submission of Plans and Specifications
Begin Construction
Complete Construction
4 . Alternative Analysis Evaluation: Has the facility evaluated all
of the non-discharge options available. Please provide regional
perspective for each option evaluated.
Spray Irrigation: There is not sufficient land available to spray
and comply with set back distances .
Connection to Regional Sewer System: It is over five miles to any
eixisting municipal sewer system.
Subsurface: Land area is not available for the total system.
Other disposal options:
5 . Other Special Items:
Page 3

I t
PART IV - EVALUATION AND RECOMMENDATIONS
Mr. Leroy Dixon has made application for the permit renewal for a wastewater
treatment system to serve Harmony Estates, Inc. The wastewater treatment system has
been constructed and is in place; however, only three houses have been placed on
site and one of these units is the model with no one living in them. Septic tanks
have been installed to serve these homes until more houses are located in the
proposed development.
Since the facility is not operating there is no operational data or monitoring
reports.
It is recommended that the permit be issued.
/ /
.40111
Signature of Report P'parer
414111111.-
ater Quality Regional Supervisor
/40
Date
Page 4

I
/ , •
7
` . ' ,
Ro6erDean
• •
Jr
r
1
r
r
MIRE
cI WtA

L Z
Vie Ze vb cC" l (� W W / D %� (� . b
1� • �iA�`f/L/Jl

r
State of North Carolina
Department of Environment, Health and Natural Resources
Division of Environmental Management
512 North Salisbury Street • Raleigh, North Carolina 27626-0535
James G. Martin, Governor George T. Everett, Ph.D.
William W. Cobey, Jr., Secretary Director
July 19, 1991
Mr. Robert D. Elledge
17 Ellis Street
Marion, North Carolina 28752
Subject: Permit No. NCO079481
Authorization to Construct
Harmony Estates Subdivision
Wastewater Treatment Facility
McDowell County
Dear Mr. Elledge:
A letter of request for an Authorization to Construct was received April 16, 1991 by the
Division and final plans and specifications for the subject project have been reviewed and found to
be satisfactory. Authorization is hereby granted for the construction of a 20,000 GPD extended
aeration wastewater treatment package plant consisting of a bar screen, an 8,000 gallon created
flow equalization tank with dual submersible 85 GPM grinder pumps and high water alarms, a
flow equalization tank 20 cfm blower unit, a 20,000 gallon aeration tank , dual 90 cfn blower
units, aeration tank foam control system with a 30 gpm pump supported in the clarifier, a 3,375
gallon hopper bottom clarifier, a 3,000 gallon aerated sludge holding chamber, a 417 gallon
chlorine contact chamber with a tablet chlorinator, a flow metering box with v-notch weir and flow
recorder, a tablet dechlorinator, approximately 170 linear feet of effluent piping and protective
rip -rap at outlet, and all associated piping, valves, controls, and appurtenances with discharge of
treated wastewater into an unnamed tributary to North Muddy Creek, classified Class C waters.
This Authorization to Construct is issued in accordance with Part III paragraph A of
NPDES Permit No. NCO079481 issued December 17, 1990, and shall be subject to revocation
unless the wastewater treatment facilities are constructed in accordance with the conditions and
limitations specified in Permit No. NCO079481.
The sludge generated from these treatment facilities must be disposed of in accordance with
G.S. 143-215.1 and in a manner approved by the North Carolina Division of Environmental
Management.
In the event that the facilities fail to perform satisfactorily, including the creation of
nuisance conditions, the Permittee shall take immediate corrective action, including those as may be
required by this Division, such as the construction of additional or replacement wastewater
treatment or disposal facilities.
Pollution Prevention Pays
is P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone]
An Equal Opportunity Affirmative Action Employer

e
The Asheville Regional Office, phone no. 704/ 251-6208 shall be notified at least
forty-eight (48) hours in advance of operation of the installed facilities so that an in -place
inspection can be made. Such notification to the regional supervisor shall be made during the
normal office hours from 8:00 a.m. until 5:00 p.m. on Monday through Friday, excluding State
Holidays.
Upon completion of construction and prior to operation of this permitted facility, a
certification must be received from a professional engineer certifying that the permitted facility has
been installed in accordance with the NPDES Permit, this Authorization to Construct and the
approved plans and specifications. Mail the Certification to the Permits and Engineering Unit,
P.O. Box 29535, Raleigh, NC 27626-0535.
The subject wastewater treatment and disposal facilities shall be connected to an operational
publicly owned wastewa-rer collection system within 180 days of its availability to the subject
facilities, if the subject wastewater treatment or disposal facilities are in noncompliance with the
terms and conditions of the NPDES permit, the Authorization to Construct, or the governing
statutes or regulations.
Prior to the initiation of these connection activities, appropriate approval must be received from this
Division.
Upon classification of the facility by the Certification Commission, the Permittee shall
employ a certified wastewater treatment plant operator to be in responsible charge of the
wastewater treatment facilities. The operator must hold a certificate of the type and grade at least
equivalent to the classification assigned to the wastewater treatment facilities by the Certification
Commission. Once the facility is classified, the Permittee must submit a letter to the Certification
Commission which designates the operator in responsible charge within thirty days after the
wastewater treatment facilities are 50% complete.
A copy of the approved plans and specifications shall be maintained on file by the Permittee
for the life of the facility.
Failure to abide by the requirements contained in this Authorization to Construct may
subject the Permittee to an enforcement action by the Division of Environmental Management in
accordance with North Carolina General Statute 143-215.6.
The issuance of this Authorization to Construct does not preclude the Permittee from
complying with any and all statutes, rules, regulations, or ordinances which may be imposed by
other government agencies (local, state, and federal) which have jurisdiction.
One (1) set of approved plans and specifications is being forwarded to you. If you have
any questions or need additional information, please contact Mr. John Seymour, telephone
number 919/733-5083.
Ie,ely,
George T. Everett
cc: McDowell County Health Departme t
Asheville Regional Office
Training and Certification Unit
Facilities Assessment Unit
@I

�as�t� (2.ti✓c.��J i � L. � \N Tom.^-►sti rJ 4 C'Priu
k 5 cti4!N 6'"klO15ES WASTE LOAD ALLOCATION
PERMIT NO.: NCO079481
PERMITTEE NAME: Robert Dean Elledge / Harmony Estates
Facility Status: Proposed
Permit Status: New
Major Minor
Pipe No.: 001
Design Capacity: 0.040 MGD
Domestic (% of Flow):
Industrial (% of Flow):
Comments:
Residential - See attached.
11
0%
STREAM INDEX: O -- 3 Z — )
RECEIVING STREAM: an unnamed tributary to North Muddy Creek
Class: C,
Sub -Basin: 03-08-30
Reference USGS Quad:
E 11 NW, Marion, East
(please attach)
County: McDowell
Regional Office: Asheville Regional Office
Previous Exp. Date: 00/00/00 Treatment Plant Class: II?, III?
Classification changes within three miles:
Ca. 3 - 5 mi. to Catawba River -> WS-III.
Requested
Prepared b
Reviewed
ec loo 5 - J
ft A
Date: 7/10/90
Date: 9 �'% Yc
Date: th, /I
Modeler
Date Rec.
#
7 �� 5n
S7gr
M
Drainage Area (mi z) a, _�/ Avg. Streamflow (cfs): o, 31-
7Q10 (cfs) 0,06 Winter 7Q10 (cfs) G, o9 30Q2 (cfs) c,, I's-
1
Toxicity Limits: IWC + % Acute/Chronic
Instream Monitoring:
Parameters dO �-e C 6-
Upstream Location
Downstream i`' Location _70o ,?I-. �d�s
Effluent
Characteristics
Summer
Winter
BODS (mg/1)
NH3-N (mg/1)
1,7 A
AL
D.O. (mg/1)
.S"
Ogg-
TSS (mg/1)
70
F. Col. (/100 ml)
.2 o c.�
Zoo
PH (SU)
r _ 0.5
T yes. e&U,,/'t
Comments: refer: Basinwide / Streamline WLA file
at front of subbasin

•
• Request No. : 5791
RECEIVED
WASTELOAD ALLOCATION APPROVAL FORM ---W rtrtrtpiectisr---
Facility Name: HARMONY ESTATES ,,
NPDES No. : NC0079481 SEP 1 3 1990
Type of Waste: 100% DOMESTIC
Status: PROPOSED
Receiving Stream: UT NORTH MUDDY CREEK Asheville Region! Office
Classification: C Asheville, North Carolina
Subbasin: 030830 Drainage area: 0.210 sq mi
County: MCDOWELL Summer 7Q10: 0.06 cfs
Regional Office: ARO Winter 7Q10: 0.09 cfs
Requestor: SHANKLIN Average flow: 0.32 cfs
Date of Request: 7/11/90 30Q2: 0.15 cfs
Quad: El1NW
RECOMMENDED EFFLUENT LIMITS
SUMMER WINTER!
Wasteflow (mgd) : 0.04 0.04
BOD5 (mg/1) : 30 30
NH3N (mg/1) : 1.7 4
DO (mg/1) : 5 NR .-)C r ti 0 1y0
TSS (mg/1) : 30 30 n ,
Fecal coliform (#/100m1) : 200 lip p�RMITS& FNG
pH (su) : 6-9 9
Tot. res. chlorine (ug/l) : 28 8
Toxicity Testing Req. : N a
MONITORING
Upstream (Y/N) : Y Location: 100 FT. UPSTREAM OF DISCHARGE
Downstream (Y/N) : Y Location: 300 FT. DOWNSTREAM OF DISCHARGE
COMMENTS
AMMONIA LIMITS BASED ON PROTECTION OF INSTREAM AMMONIA TOXICITY.
Recommended by: - t_ Date: 7/7/90
Reviewed by
Instream Assessment Date: /ti/t2/ O
..A
Regional Super ' Date: Si 0 ;;Yi/ cr ()
Permits & Engine ring: Date: Z0/C0
RETURN TO TECHNICAL SUPPORT BY: OCT 10 1990

•
SUMMER
11337zry 30Nif,7nx u ltr- 4 ?
MODEL RESULTS
Discharger : HARMONY ESTATES
Receiving Stream : UT NORTH MUDDY CREEK
The End D.O. is 8.11 mg/1.
The End CBOD is 2.10 mg/1.
The End NBOD is 0. 97 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 6.20 0.00 1
Reach 1 45.00 7. 65 5.00 0.04000
Reach 2 0.00 0.00 0.00 0.00000
Reach 3 0.00 0.00 0.00 0.00000

*** MODEL SUMMARY DATA ***
Discharger : HARMONY ESTATES Subbasin : 030830
Receiving Stream : UT NORTH MUDDY CREEK Stream Class: C
Summer 7Q10 : 0.06 Winter 7Q10 : 0.09
Design Temperature: 25.0
'LENGTH' SLOPEI VELOCITY I DEPTHI Kd I Kd I Ka I Ka I KN I
I mile I ft/mil fps I ft Idesignl @20% Idesignl @20% Idesignl
I I I I I I I I I I
Segment 1 I 0.071173. 901 0.171 10.22 10.84 10.67 155.75 150.001 0.73 I
Reach 1 I I I I I I I I I I
I I I I I I I I I I
Segment 1 I 0.301 36.001 0.110 10.28 10.49 10.39 17.96 I 7.141 0.73 1
Reach 2 1 I I I I I I I I I
I I I I I I I I I I
Segment 1 I 0.701 36.001 0.544 11.26 10.52 10.41 128.38 125.451 0.73 I
Reach 3 1 I I I I I I I I I
I Flow I CBOD I NBOD I D.O. I
1 cfs I mg/1 I mg/1 I mg/1 I
Segment 1 Reach 1
Waste I 0.062 145.000 I 7. 650 I 5.000
Headwaters ) 0.060 I 2.000 I 1.000 I 7.440
Tributary 1 0.000 I 2.000 I 1.000 I 7.440
* Runoff 1 0.054 I 2.000 I 1.000 I 7.440
Segment 1 Reach 2
Waste 1 0.000 I 0.000 I 0.000 I 0.000
Tributary I 0.000 I 2.000 I 1.000 I 7.440
* Runoff 1 0.054 I 2.000 I 1.000 I 7.440
Segment 1 Reach 3
Waste I 0.000 I 0.000 I 0.000 I 0.000
Tributary 112. 900 I 2.000 I 1.000 I 7.440
* Runoff I 0.000 I 2.000 I 1.000 I 7.440
* Runoff flow is in cfs/mile

SUMMER
I Seg # I Reach # I Seg Mi I D.O. I CBOD I NBOD I Flow I
1 1 0.00 6.20 23.85 4.38 0.12
1 1 0.01 6.50 23. 69 4.35 0.12
1 1 0.02 6.75 23.52 4.33 0.12
1 1 0.03 6. 95 23.36 4.30 0.12
1 1 0.04 7.12 23.19 4.28 0.12
1 1 0.05 7.25 23.03 4.25 0.12
1 1 0.06 7.36 22.87 4.23 0.13
I 1 1 0.07 7.45 22.71 4.20 0.13
1 2 0.07 7.45 22.71 4.20 0.13
1 2 0.10 7.33 22.27 4.11 0.13
1 2 0.13 7.24 21.83 4.02 0.13
1 2 0.16 7.15 21.41 3. 93 0.13
1 2 0.19 7.09 21.00 3.85 0.13
1 2 0.22 7.04 20. 60 3.77 0.13
1 2 0.25 6. 99 20.21 3. 69 0.14
1 2 0.28 6. 96 19.84 3. 62 0.14
1 2 0.31 6. 94 19.47 3.54 0.14
1 2 0.34 6. 92 19.11 3.47 0.14
1 2 0.37 6. 91 18.76 3.40 0.14
1 3 0.37 7.43 2.18 1.03 13.04
1 3 0.47 7. 64 2.17 1.02 13.04
1 3 0.57 7.79 2.16 1.01 13.04
1 3 0.67 7.90 2.14 1.00 13.04
1 3 0.77 7. 98 2.13 0.99 13.04
1 3 0.87 8.04 2.12 0.98 13.04
1 3 0. 97 8.08 2.11 0. 98 13.04
1 3 1.07 8.11 2.10 0.97 13.04
I Seg # I Reach # I Seg Mi I D.O. I CBOD I NBOD I Flow I

WINTER
MODEL W/ BOD5=30 & NH3 TOX
LIMIT = 4.0
MODEL RESULTS
Discharger : HARMONY ESTATES
Receiving Stream : UT NORTH MUDDY CREEK
The End D.O. is 10.10 mg/1.
The End CBOD is 2.08 mg/1.
The End NBOD is 1.03 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 5.49 0.00 1
Reach 1 45.00 18.00 0.00 0. 04000
Reach 2 0.00 0.00 0.00 0.00000
Reach 3 0.00 0.00 0.00 0.00000

*** MODEL SUMMARY DATA ***
•
Discharger : HARMONY ESTATES Subbasin : 030830
Receiving Stream : UT NORTH MUDDY CREEK Stream Class: C
Summer 7Q10 : 0.06 Winter 7Q10 : 0.09
Design Temperature: 14.0
ILENGTHI SLOPEI VELOCITY I DEPTHI Kd I Kd I Ka I Ka I KN I
I mile I ft/mil fps I ft Idesignl @204 Idesignl @20% Idesignl
I I I I I I I I i I
Segment 1 I 0.071173. 901 0.202 10.23 10.56 10.74 143.88 150.001 0.32 I
Reach 1 I I I I I I I I I I
I I I I I I I I I I
Segment 1 I 0.301 36.001 0.132 10.29 10.32 10.42 17.48 I 8.521 0.32 I
Reach 2 1 I I I I I I I I I
I I I I I I I I I I
Segment 1 I 0.701 36.001 0.752 11.33 10.36 10.48 130.87 135.181 0.32 I
Reach 3 I I I I I I I I I I
I Flow I CBOD I NBOD I D.O. 1
1 cfs I mg/1 I mg/1 I mg/1 I
Segment 1 Reach 1
Waste I 0.062 145.000 118.000 I 0.000
Headwaters ) 0.090 I 2.000 I 1.000 I 9.280
Tributary I 0.000 I 2.000 I 1.000 I 9.280
* Runoff 1 0.080 I 2.000 I 1.000 I 9.280
Segment 1 Reach 2
Waste I 0.000 I 0.000 I 0.000 I 0.000
Tributary I 0.000 I 2.000 I 1.000 I 9.280
* Runoff I 0.080 I 2.000 I 1.000 I 9.280
Segment 1 Reach 3
Waste I 0.000 I 0.000 I 0.000 I 0.000
Tributary 119.900 I 2.000 I 1.000 I 9.280
* Runoff 1 0.000 I 2.000 I 1.000 I 9.280
* Runoff flow is in cfs/mile

`
WINTER
MODEL
W/ BOD5=30 & NH3 TOX
•
LIMIT
= 4.0
I Seg #
I Reach # I
Seg Mi I
D.O. I
CBOD I
NBOD
I Flow I
1
1
0.00
5.49
19.54
7.93
0.15
1
1
0.01
6.07
19.41
7.89
0.15
1
1
0.02
6.58
19.29
7.85
0.15
1
1
0.03
7.02
19.17
7.80
0.15
1
1
0.04
7.40
19.05
7.76
0.16
1
1
0.05
7.73
18.93
7.72
0.16
1
1
0.06
8.02
18.81
7.68
0.16
1
1
0.07
8.28
18.69
7.64
0.16
1
2
0.07
8.28
18.69
7.64
0.16
1
2
0.10
8.38
18.36
7.50
0.16
1
2
0.13
8.48
18.04
7.38
0.16
1
2
0.16
8.56
17.73
7.25
0.16
1
2
0.19
8.64
17.42
7.13
0.17
1
2
0.22
8.71
17.13
7.01
0.17
1
2
0.25
8.78
16.84
6.90
0.17
1
2
0.28
8.84
16.56
6.79
0.17
1
2
0.31
8.89
16.29
6.68
0.18
1
2
0.34
8.94
16.03
6.57
0.18
1
2
0.37
8.99
15.77
6.47
0.18
1
3
0.37
9.28
2.12
1.05
20.08
1
3
0.47
9.50
2.12
1.05
20.08
1
3
0.57
9.67
2.11
1.04
20.08
1
3
0.67
9.80
2.11
1.04
20.08
1
3
0.77
9.91
2.10
1.04
20.08
1
3
0.87
9.99
2.09
1.04
20.08
1
3
0.97
10.05
2.09
1.03
20.08
1
3
1.07
10.10
2.08
1.03
20.08
I Seg
I Reach I
Seg Mi I
D.O. i
CBOD I
NBOD (
Flow I

zo
t�io,.n �j ��A �f� `(� �� ,C/�s►� ��rK`J � fir%
. _ l
J
030Y30 s71l
i .10
y Os
O11014.O..t'7..ws
04=0,
�ac*
3a�t.s •.lfdY
o
= �• Of AJV I d i,13 J?7• z0 Z 7
Sao r 0.06 C % 9Yq4 = '4(� ]•��
•-- - ___ .- -- -- - - ----- -- - ---- 34to 0.1 Svcs • 13 cf3 J
7. 147s Q i0 d3
3eQ z = .3 cf3
zc
7744
i
Ailll� �s
� f�

Z-
i 0002 „l 6zo
�A G, 3 Z c�
,09—,06c�
S -7p
./L
w7?
36
V
�� -
69, 700, fC4,

74
A 2

harmony estates
AMMONIA ANALYSIS
7Q10: 0.0600 cfs
NH3 Effl. Conc: 0.0000 mg/1
AL (1/1 .8 mg/1) : 1000.00 ug/1
Upstream NH3 Conc. : 220.0000 ug/1
Design Flow: 0.0400 MGD
Predicted NH3 Downstream: 108.20 ug/1
0.108196 mg/1
NH3 Limit: 1754.838 ug/1
1.754838 mg/1
AMMONIA ANALYSIS (WINTER)
7Q10: 0.0900 cfs
NH3 Effl. Conc: 0.0000 mg/1
AL (1/1.8 mg/1) : 1800.00 ug/1
Upstream NH3 Conc. : 220.0000 ug/1
Design Flow: 0.0400 MGD
Predicted NH3 Downstream: 130.26 ug/1
0.130263 mg/1
NH3 Limit: 4093.548 ug/1
4.093548 mg/1

BOYPATES
CHLORINE
7010: 0.0600
CL2 Effl. Conc: 0.0000
AL (17/19 ug/1) : 17.0000
►tream CL2 Conc.: 0.0000
Design Flow: 0.0400
CL2 Downstream: 0.00
0
CL2 Limit: 33.45161
0.033451
ANALYSIS
cfs
mg/l
ug/l
ug/l
MGD
ug/l
mg/l
ug/l
mg/l

Facility r�/ � f Wasteflow "(MGD) �.�
BOD5 NH3-NOe-
-
C/S= 301
o 4t5I

• .
• .
I
R I.• r L- ,„r.,-4--)
ENGINEERING PROPOSAL - Ls
fv
I. General Information JUL (i 9 ''Ji)
Project - Harmony Estates �cPi�S �, } r
p Y
Location - McDowell County
Engineer - Charles H. Davis, Jr. , P. E. ,{
NC 2903 i
P. O. Box 1691
Hickory, NC 28603
A. Description of Proposed Facilities ' •
The proposed WWTP will be a 40, 000 GPD Extended Aeration
Package Plant. The system will be composed of a flow
equalization tank with bar screen, aeration chamber,
clarifier chamber, and chlorination chamber. The
mechanical equipment will consist of influent grinder
PP
um s, aeration blowers; chlorination mixing drums, flow
recorder, and various piping. Detailed plans and
specifications will be submitted with the Authorization
to Construct application. A schematic of the treatment
• plant is enclosed.
B. Project Description
J ! The proposed WWTP will serve approximately 100
manufactured home sites. The project will be a
residential retirement community. The daily flow is
calculated to be 400 GPD/lot; 400 GPD x 100 lot = 40, 000
R GPD. The flow will be all domestic. The NPDES
i application is 40, 000 GPD.
t
C. Project Phasing
` The project is not anticipated to be phased. There will
be some time lapse from start-up until the project is
! ; sold out, but this is unavoidable and unpredictable.
II. Evaluations
A. Connection to Sewerage System
The closest existing sewer line is approximately 4 miles
upstream from the project. The sewer line is at the City
of Marion's WWTP that discharges into Youngs Fork Creek.
The topographical features of the area would prevent a
sewer line extension to the project. Several pump
stations, force mains, and easements would be necessary
to even consider the connection. A topographic map of
the area is attached.
The City of Marion does not have any future plans to
extend sewer mains to this area. The Director of Public

1 .
Works in Marion has informed me that no extension of
sewer mains is planned for the area in the next 10 to 15
• years.
I ? '
B. Subsurface Disposal
The proposed lots in the project are approximately 1/4
acre in size. The McDowell County Sanitarian, Mr. Jeeter
Laws, concluded that the lot sizes were too small for
individual septic fields. He informed me that the lots
would have to be approximately 1/2 acre in size to
accommodate a septic field with a preliminary application
rate of 0. 4 GPD/sq. ft.
The type of buyer for the lots is retired and could
probably not afford or desire a bigger lot. If the
individual septic field is used, approximately 1/2 of the
lots would be lost for sales. This would undoubtedly
force the project to shutdown.
• C. Spray Irrigation
The project is presently wooded and does not have any
available spray open areas for s irrigation. The area
P P Y g
necessary for spray irrigation with an application rate
of 0. 5 in/week would be approximately 6 to 8 acres.
D. Proposed Discharge
The nearest stream with a positive 7Q10 borders the
project and is an unnamed tributary of North Muddy Creek.
The drainage area at the discharge point is 136 acres.
This information has been forwarded to the USGS
Hydrologic Department in Raleigh to determine the 7Q10,
30Q2, and average daily flow. Copies of the report will
be sent to the NC DEHNR upon receipt.
The proposed cost of the treatment plant is as follows:
ITEM COST
40, 000 GPD WWTP $ 50, 000. 00
Installation 5, 000. 00
Utilities 250. 00/month
Maintenance 200. 00/month
Operation 325. 00/month
III. Conclusion
The proposed NPDES Discharge Permit is the most feasible
wastewater treatment option. Useable land area for
alternative of subsurface disposal is not available with
the proposed lot size. The project is planned for a
retirement community and larger lots would not be

•r
•
economically feasible for the retirees to purchase.
• The treatment plant will be operated to meet the limits
of the NPDES Permit by an experienced private firm,
separate form the Harmony Estates Developers. All
requirements for the NPDES Permit will be met.
40,11.
O
J-K.
Davis, :� ; P. E.
NC 2903 SEAL
•
29O -
y�[
1{r
1
I �
•
I

L'
OC
tit '' ' � ! ' .' .. •' `
06
I •r•wr r ,., t l • r•..' V - t � r ' rl � I _```I
i �;r7?�'i!'•,r,'}�r:,i• .r 'e y...' 'i�i.t :il. .J r. I /
i::"i•';• ' .. i fir!'+.+'.,;. ! 1 �; � l / / I1 ;Ir'
1= .1. , !! r f' rr - " f ,• / 1.
1 f • , r.
r,/, ti,l•,, � ::'..� !, r!. Jf f r� •'". +i. �' ''r %1'.: • r`' 11
1.., r':/ .;v•, ..r- ..'!.'::,;.+ter. r.!,. '/ •v , •ti; y�:1,Y ::; +•�' f!ra' •.r.•' � r' •, 4.•
t{.!%d1?°:{:rai��'.r. 'r r - f .':���� \/ -i: •;:.�'i •: .t.'f:'�'r' �.ti t'..
1.! =ltJ� nr• '1 I i, ! �. -, t:' S .;r r. -• r.•r Q
,1 ,I r yr, s: !. .i. .r., r•' '1•
•1,,f1, i , r .,� � lYf r �,r � ,i.�.
rr lI DIS` HARGE
• J�r+J.l , 'aft • ., ',:trr.i,,• 1,!^.�/i O 1+.
TP A J..rfr+ •�,: ;F ( ' ! ,,;-,. _ ! , , /s ; Ip' ; r, SEV�E RE t,••
7 F r.... •,•i. r ten;. � ! ,. •.f 1 '1
I r.`d•+' :riw, !. ,ri: tk �r. 1.1 c ,. h.: ri.
+'1:'+'f ~Yr`v' 1 / r i ' '•?!.. / ' Il• :ll�,'{,• .,x J;tr.
AIM .rl �, :,:. -1• ;. :i'�i., ;1:'Gt• '0:,. ,fr
1/ ::+' Iftr �jO q'r. -�.� � •'r / .arii. j.(. ,rl fl. h �.:.• ..
t•,lJr ,'(i1+� 4• :! q lr ,r (�f •N �y.•. ly'r"1•f.+�
:iti uN".i �.ti 1 r ry 1
'0rl..
tr:'+'• :�i�,+'ii r 'J,/ru•. 'r;r•:•'•r lr-r r�i'.
•,n'f,w. :['''ljty''•: J,yp+,.n .f. � :r ni� !+... ;y, rt C;ra:;. •rt; L ��• O'•. ^
fYL •4n'fA�tr. ;t ...?ylf ":"••:+r,j: ti'r /'•'''' 'N +»'.Hl � 1 !'."A .. •. .. ... .... _. I.•. ...•'/
,h+7;: li" N„• r), .r; !li '( r• ' i G f G •. f. :,�
{ ..•Jfrl ,:_ �,,. r � 'r•, j•C {I •,1. 1. .�� f �. 1 4 ,' ty . ,17 't ! I! r .• ! �,- \ . AAv, t o N c— A �i 1
Yh' �1'rxfi. 11: ,1 i , !r. ,N'r' ., . , (? t%, i7 �N t.-C
• w' � r 4 :•Cr�`�41.'�r,• 6!Cia �.�•''1!(. ', t J' 'r •!"''d •'{'t 'rr' r .t,
k,• �A uf'�"i 'Jry�!i' • • • " ' •�. 7 r � : r'• :: } r' -�+;,, '♦r.ti ','
!i i�t:l• •n'+I. iy'.-. •,If r 1 � 1f.7 r r, !, f f 111' !'
` '•,.•�•''rt: . ssw.',Irrf: J7. :.:r , 1 ., • ('. • ,. • b '�".: � � � tJ f V � "'� 5—rhi7L'•..
DNS li�,r ! f 1 r + I I `/
I'
�JZ?:.i.r..r;" , J, t�tti. ',,4,, .. -':'.. r.. •'+:I � .•1 '�.i: �r ' '.o .�,.} / 1• .
r f4l :r ,,r •r r b!r T :r.t +f tij +-t O \ .r
......... ATLA, �J T I C- PLb6 /J Col.
1' 4Mdf5 r 4 r,+ r• :y, 1. r 7 !-
u Box 1691 Nl4/-'-0eY NG 2Stbc
I!f /
I� GRMe Lf,51+, PA VISI�rL PE,

J ,
LAJ
AM
\ o'14
\ Q W
u " lop
J d
`•�" / � ,. do ,� o ; ' '�` ---�
,, � -• Cam- �._�' � �� \
J : J �/274 �' _ // o
\ 1 r \ \'
_ _ \
G'r gti.s 0 1`
iaar. c n Crro've CcmX1408 OF
148
46
j
/3/3X
\ Oclty E a55 i
- 0 �I1 \ %404—
P Gem r �ti° \ '� / �V LttllC—M^tn�
\�
1247
1tIV
ef
4 .�j c,:
u .lcy 'us Gh U
•>• err -. (/ f J�~f' _ � .� �� ! ''l�
o
1lr0 � --IA
�- �v ,ACC

11142
T!/ CAAPI
C ^ OW LL C •UNTA
10 East Court Street • Marion,North Carolina 28752 • [phone]
•
• Mr. M. Dale Overcash, PE
North Carolina • •
Department of Evironmental Health and Natural Resources
P.O. Box 27687
Raleigh, N.C. 27811-7687 •
•
Dear Mr. Overcash:
McDowell County has been asked to respond to the NPDES Discharge
•
Application filed by R.D. Elledge (Harmony Estates) .
•
The proposed sewage treatment plant set for construction would
not fall under any local McDowell County regulations with the exception
of the local floodplain ordinance. Of course, all requirements enforced
by the Rutherford-Polk-McDowell Health Department and the State
of North Carolina would have to be met.
This letter is being forwarded to the District Health Director for
his information. If I can answer any questions or be of any service please
do not hesitate to call.
Sincerely
Charles R. Abernathy
County Manager
pc Cliff Fields
District Health Department •
•
ii
mi ®

.
SUMMER
• MODEL W/ MAX NBOD=75 IF CBOD=
• 45 MG/L
MODEL RESULTS
Discharger : HARMONY ESTATES
Receiving Stream : UT NORTH MUDDY CREEK
The End D.O. is 8.03 mg/1.
The End CBOD is 2.12 mg/1.
The End NBOD is 1.25 mg/l.
WLA WLA WLA
DO Min CBOD NBOD DO Waste Flow
(mg/1) Milepoint Reach # (mg/1) (mg/1) (mg/1) (mgd)
Segment 1 5.01 0.37 2
Reach 1 45.00 75.00 5.00 0.04000
Reach 2 0.00 0.00 0.00 0. 00000
Reach 3 0.00 0.00 0.00 0.00000

SUMMER
MODEL W/ MAX NBOD=106 IF
CBOD = 0
MODEL RESULTS
Discharger : HARMONY ESTATES
Receiving Stream : UT NORTH MUDDY CREEK
The End D.O. is 8.03 mg/l.
The End CBOD is 1.93 mg/l.
The End NBOD is 1.37 mg/l.
WLA WLA WLA
DO Min CBOD NBOD DO Waste Flow
(mg/1) Milepoint Reach # (mg/1) (mg/1) (mg/1) (mgd)
Segment 1 5.03 0.37 2
Reach 1 0.00 106.00 5.00 0.04000
Reach 2 0.00 0.00 0.00 0.00000
Reach 3 0.00 0.00 0.00 0.00000