NC0057193_Permit Issuance_20130318

.ram �DD
NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Pat McCrory Charles Wakild, P.E. John E. Skvarla III
Governor Director Secretary
March 18, 2013
Mr. Lance Ingram
Nantahala Outdoor Center, Inc.
13077 U.S. Hwy 19W
Bryson City, N.C. 28713
Subject: Issuance of NPDES Permit NCO057193
Nantahala Outdoor Center WWTP
Class WW-2
Swain County
Dear Mr. Ingram:
Division personnel have reviewed and approved your application for renewal of the subject permit.
Accordingly, we are forwarding the attached NPDES discharge permit. This permit is issued pursuant to
the requirements of North Carolina General Statute 143-215.1 and the Memorandum of Agreement between
North Carolina and the U.S. Environmental Protection Agency dated October 15, 2007 (or as subsequently
amended).
This final permit includes no major changes from the draft permit sent to you on January
16, 2013.
If any parts, measurement frequencies or sampling requirements contained in this permit are
unacceptable to you, you have the right to an adjudicatory hearing upon written request within thirty (30)
days following receipt of this letter. This request must be in the form of a written petition, conforming to
Chapter 1508 of the North Carolina General Statutes, and filed with the Office of Administrative Hearings
(6714 Mail Service Center, Raleigh, North Carolina 27699-6714). Unless such demand is made, this
decision shall be final and binding.
Please note that this permit is not transferable except after notice to the Division. The Division may
require modification or revocation and reissuance of the permit. This permit does not affect the legal
requirements to obtain other permits which may be required by the Division of Water Quality or permits
required by the Division of Land Resources, the Coastal Area Management Act or any other Federal or Local
governmental permit that may be required. If you have any questions concerning this permit, please
contact Charles Weaver at telephone number [phone].
Sincer ly,
harles Wakild, P.E. [
cc: Central Files
Asheville Regional Office/Surface Water Protection
NPDES Unit
1617 Mail Service Center, Raleigh, North Carolina 27699-1617 One
512 North Salisbury Street, Raleigh, North Carolina 27604 NorthCaro lina
Phone: [phone] / FAX [phone] / http://portal.ncdenr.org/web/wq Aaft(wily
An Equal Opportunity/Affirmative Action Employer — 50% Recycled/10% Post Consumer Paper

Permit NCO057193
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provision of North Carolina General Statute 143-215.1, other lawful standards and regulations
promulgated and adopted by the North Carolina Environmental Management Commission, and the Federal Water
Pollution Control Act, as amended,
Sutton Bacon
is hereby authorized to discharge wastewater from.a facility located at the
Nantahala Outdoor Center WWTP
U.S. Highway 19
Wesser
Swain County
to receiving watets designated as the Nantahala. River in subbasin 04-04-02 of the Little Tennessee River
Basin in accordance with effluent limitations, monitoring requirements, and other conditions set fotth in
Parts I, II, III and IV hereof.
This permit shall become effective May 1, 2013.
This permit and authorization to discharge shall expire at midnight on October 31, 2017.
Signed this day March 18, 2013
r1Chia es WaHd, P.E., Ditectot
Division of Water Quality
By Authoi* of the Environmental Management Commission

Permit NCO057193
SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDES Permits issued to this facility, whether. for operation or discharge are hereby
revoked, and as of this issuance, any previously issued permit bearing this number is no longer
effective. Therefore, the exclusive authority to operate and discharge from this facility arises under the
permit conditions, requirements, terms, and provisions included herein.
The Nantahala Outdoor Center is hereby authorized to:
1. Continue to operate an existing 0.040 MGD wastewater treatment facility with the
following components:
♦ Bar.screen
♦ Influent grinder pump (5 hp) with equalization
♦ Dual 40,000-gallon reactor basins
♦ 14,000-gallon post equalization basin
♦ 20,000-gallon waste sludge digester with .blower (5 hp)
♦ Tablet chlorine disinfection with contact chamber
♦ Dechlorination chamber with sodium sulfite feed pump
♦ Post -treatment flow metering
The facility is located at the Nantahala Outdoor Center WWTP in Wessex off U.S.
Highway 19 in Swain County.
2. Discharge from said treatment works at the location specified on the attached map into
the Nantahala River, a class B-Trout stream in hydrologic unit 06010202 of the Little
Tennessee River Basin.

Quad: Wesser, N.C. N COO57193
Stream Class: B-Trout
Subbasin: 40402 Nantahala Outdoor Center
Latitude: 35'19'59" W WTP
Longitude: 83°35'30"
Receiving Stream: Nantahala River
Facility .:.-------•�
z;
Location
�Q1lt�L Swain County
Map not to scale

Permit NCO057193
A. (1) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
Ducting the period beginning on the effective date of this permit and lasting until expiration, the Permittee is
authorized to discharge from outfall 001. Such discharges shall be limited and monitored by the Petmittee as
specified below:
PARAMETER
LIMITS
MONITORING REQUIREMENTS
[PCS Code]
Monthly
Daily
Measurement
Sample Type
Sample Location
Average
Maximum
Frequency
Flow
-[50050]
0.040 MGD
Continuous
Recording
Influent or Effluent
BOD, 5-day (20°C)
[00310]
30.0 mg/L
45.0 mg/L
Weekly
Composite
Effluent
Total Suspended Solids
[00530]
30.0 mg/L
45.0 mg/L
Weekly
Composite
Effluent
NHs as N
[00610]
2/Month
Composite
Effluent
Fecal Coliform (geometric mean)
[31616]
200 / 100 ml
400 / 100 ml
Weekly
Grab
Effluent
Total Residual Chlorine'
[50060]
17 Hg/L
2/Week
Grab
Effluent
Temperature (°C)
[00010]
Weekly
Grab
Effluent
pH
[00400
> 6.0 and < 9.0 standard units
— —
2/Month
Grab
Effluent
Footnotes:
1. Limit and monitoring requirements apply only if chlorine is added for disinfection. The Permittee shall report all
effluent TRC values reported by a NC -certified laboratory [including field -certified]. Effluent values < 50 µg/L
will be treated as zero for compliance purposes.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

ASF EVU .i .F.
CITIZEN TB ES
VOICE OF THE MOUNTAINS • CITIZEN-TIMFS.com
AFFIDAVIT OF PUBLICATION
Public Notice BUNCOMBE COUNTY
North Carolina Environmental Management
C
ommi
s
s
i
on/
NPDES Unit
1617 Mail Service Center c �.
Raleigh, NC 27699.1617 O
ice of Intent to Carolina
a wonPIDES ental a n NORTH CAROLINA
ice of North Carolina Environmental Man. NORTH
the undersigned, a Notary Public of said County and
State, duly commissioned, qualified and authorized by law
to administer oaths, personally appeared Velene Fagan,
who, being first duly sworn, deposes and says: that she is
the Legal Billing Clerk of The Asheville Citizen -Times,
engaged in publication of a newspaper known as The
Asheville Citizen -Times, published, issued, and entered as
first class mail in the City of Asheville, in said County and
State; that she is authorized to make this affidavit and
sworn statement; that the notice or other legal
advertisement, a true copy of which is attached hereto, was
published in The Asheville Citizen -Times on the
following dates: January 17th, 2013. And that the said
newspaper in which said notice, paper, document or legal
advertisement was published was, at the time of each and
every publication, a newspaper meeting all of the
requirements and qualifications of Section 1-597 of the
General Statues of North Carolina and was a qualified
newspaper within the meaning of Section 1-597 of the
General Statues of North Carolina.
Signed this 17"h day of January, 2013
Q
Sworn to and subscribed before me the 171h day of January,
2013.E ..
, -- t,l0
My Comm ssion expires the 5,, day of October, 2013 _•;a""
[phone] 1 [phone] FAX a
14 O. HENRY AVE. ( P.O. BOX 2090 1 ASHEVILLE, NC 28802 1 [phone]
c�wWrr `.G ,-

FACT SHEET FOR EXPEDITED PERMIT RENEWALS
This form must be completed by Permit Writers for all expedited permits which do not require
full Fact Sheets. Expedited permits are generally simple 100% domestics (e.g., schools, mobile
home parks, etc) that can be administratively renewed with minor changes, but can include
facilities with more complex issues (Special Conditions, 303(d) listed water, toxicity testing,
instream monitoring, compliance concerns).
Basic Information for Expedited Permit Renewals
Permit Writer/Date
Charles H. Weaver 1/15/2013
Permit Number
NCO057193
Facility Name
Nantahala Outdoor Center WWTP
Basin Name/Sub-basin number
04-04-02
Receiving Stream
Nantahala River
Stream Classification in Permit
B-Trout
Does permit need Daily Max NH3 limits?
N/A
Does permit need TRC limits/language?
No — already present
Does permit have toxicity testing?
No
Does permit have Special Conditions?
No
Does permit have instream monitoring?
No
Is the stream impaired (on 303(d) list)?
For what parameter?
No
-
Any obvious compliance concerns?
None
Any permit modifications since last permit?
None
New expiration date
10/31/2017
Comments on Draft Permit
Application received late due to change in
ORC and other staff at NOC
Most Commonly Used Expedited Language:
• 303(d) language for Draft/Final Cover Letters: "Please note that the receiving stream
is listed as an impaired waterbody on the North Carolina 303(d) Impaired Waters List.
Addressing impaired waters is a high priority with the Division, and instream data will
continue to be evaluated. If there is noncompliance with permitted effluent limits and
stream impairment can be attributed to your facility, then mitigative measures may be
required".
• TRC language for Compliance Level for Cover Letters/Effluent Sheet Footnote:
"The facility shall report all effluent TRC values reported by a NC certified laboratory
including field certified. However, effluent values below 50 ug/1 will be treated as zero
for compliance purposes."

NBC
NANTAHALA OUTDOOR CENTER
December 4, 2012
Mrs. Dina Sprinkle
NCDENR/ DWQ Point Source Branch
1617 Mail Service Center
Raleigh NC 27699-1617
Re: NPDES Permit NCO057193
Dear Mrs. Sprinkle
Please find our enclosed NPDES Permit Renewal Application for permit NC0057193.
By the letter we request that our NPDES discharge permit be renewed. Since our last
renewal no changes have been made to our facility. The effluent flow and quality are well
below our permit limits.
We have been transporting our waste sludge by pump truck to the town of Franklin NC.
This arrangement was made with the town manager in the mid 1990's in cooperation with
the pump truck operator B&B Concrete Products.
Thank you for considering our permit request.
Ingram
Nantahala Outdoor Center
cc: Jeff Menzell Asheville DWQ
,p-7 195�
B��
DEC 1 1
2012 01JI
di St�lJRl:t s3F?- .

NPDES APPLICATION - FORM D
For privately owned treatment systems treating 100% domestic wastewaters <1.0 MGD
Mail the complete application to:
N. C. DENR / Division of Water Quality / NPDES Unit
1617 Mail Service Center, Raleigh, NC 27699-1617
NPDES Permit INCO057193
If you are completing this form in computer use the TAB key or the up - down arrows to moue from one
field to the next. To check the boxes, click your mouse on top of the box. Otherwise, please print or type.
1. Contact Information:
Owner Name
Sutton Bacon
Facility Name
Nantahala Outdoor Center Inc.
Mailing Address
13077 Hwy 19 West
City
Bryson City
State / Zip Code
North Carolina/ 28713
Telephone Number
[phone]
Fax Number
[phone]
e-mail Address
[e-mail]
2. Location of facility producing discharge:
Check here if same address as above X
Street Address or State Road Same
City
State / Zip Code
County
3. Operator Information:
Name of the firm, public organization or other entity that operates the facility. (Note that. this is not
referring to the Operator in Responsible Charge or ORC)
Name Nantahala Outdoor Center Inc.
Mailing Address 13077 Hwy 19-West
City
State / Zip Code
Telephone Number
Bryson City
North Carolina/ 28713
[phone]
Fax Number [phone]
1 of 4 Form-D 05/08

NPDES APPLICATION - FORM D
For privately owned treatment systems treating 100% domestic wastewaters <1.0 MGD
4. Description of wastewater:
Facility Generating Wastewater(check all that apply):
Industrial
❑
Number of Employees
Commercial
❑
Number of Employees 100
Residential
❑
Number of Homes
School
❑
Number of Students/Staff
Other
❑
Explain:
Describe the source(s) of wastewater (example: subdivision, mobile home park, shopping centers,
restaurants, etc.):
Restaurants, Lodging, Public Restrooms
Population served: 200
5. a of collection system
Separate (sanitary sewer only)
6. Outfall Information:
❑ Combined (storm sewer and sanitary sewer)
Number of separate discharge points one
Outfall Identification number(s) 001
Is the outfall equipped with a diffuser? ❑ Yes I k Mo
7. Name of receiving stream(s) (Provide a map showing the exact location of each outfallJ.
Nantahala River
S. Frequency of Discharge: ❑ Continuous Frintermittent
If intermittent:
Days per week discharge occurs: 7 Duration: 12hrs
9. Describe the treatment system
List all installed components, including capacities, provide design removal for BOD, TSS, nitrogen and
phosphorus. If the space provided is not sufficient, attach the description of the treatment system in a
separate sheet of paper.
.040 MGD Sequential Batch Reactor;
Bar Screen,5 hp Influent Grinder Pump Station with EQ, Two 40,000 gal Reactor Basins,
Two Aqua Aerobic Cam-D units with 5 hp mixer/aerators, 14,000 gal Post EQ Basin,
20,000 gal Waste Sludge Digester with Shp Blower, Chlorine Contact Chamber with
Tablet Feeder,
Dechlor Chamber with Sodium Sulfite Feed Pump. Post Treatment Flow Metering
See Attached for further information
2 of 4 Form-D 05/08

NPDES APPLICATION - FORM D
For privately owned treatment systems treating 100% domestic wastewaters <1.0 MGD
10. Flow Information:
Treatment Plant Design flow .040 MGD
Annual Average daily flow .011 MGD (for the previous 3 years)
Maximum daily flow .039 MGD (for the previous 3 years)
11. Is this facility located on n country?
❑ ;�N'0Yes
12. Effluent Data
Provide data for the parameters listed. Fecal Coliform, Temperature and pH shall be grab samples, for all other
parameters 24-hour composite sampling shall be used. If more than one analysis is reported, report daily maximum
and monthly average. If only one analysis is reported, report as daily maximum.
Parameter
Daily
Maximum
Monthly
Average
Units of
Measurement
Biochemical Oxygen Demand (BOD5)
7.9
5.5
MG/L
Fecal Coliform
90.3
10.6
#/ 100ml
Total Suspended Solids
11.7
7.4
MG/L
Temperature (Summer)
25.1
23.5
Celsius
Temperature (Winter)
12.4
10.4
Celsius
PH
6.8
6.7
pH units
13. List all permits, construction approvals and/or applications:
Type Permit Number Type
Hazardous Waste (RCRA) NESHAPS (CAA)
UIC (SDWA) Ocean Dumping (MPRSA)
NPDES NCO057193 Dredge or fill (Section 404 or CWA)
PSD (CAA) Other
Non -attainment program (CAA)
14. APPLICANT CERTIFICATION
Permit Number
I certify that I am familiar with the information contained in the application and that to the
best,of'*ay knowledge and belief such information is true, complete, and accurate.
Prin d name of Perschi Signing
Title
Sign ure of Applicant' P Date
North C olina General Statute 143-215.6 (b)(2) states: Any person who knowingly makes any false statement representation, or certification in any
applicati , record, report, plan, or other document files or required to be maintained under Article 21 or regulations of the Environmental Management
Commission implementing that Article, or who falsifies, tampers with, or knowingly renders inaccurate any recording or monitoring device or method
required to be operated or maintained under Article 21 or regulations of the Environmental Management Commission implementing that Article, shall be
guilty of a misdemeanor punishable by a fine not to exceed $25,000, or by imprisonment not to exceed six months, or by both. (18 U.S.C. Section 1001
provides a punishment by a fine of not more than $25,000 or imprisonment not more than 5 years, or both, for a similar offense.)
4 of 4 Form-D 05/08

SEQUENCING BATCH REACTOR
MIXAIR SYSTEM
DESIGN:
Low Load
PROJECT:
NANTAHALA OUTDOOR CENTER WWTP
DUAL BASIN SBR
DATE:
August •19, 1998
PREPARED BY:
RCM
The enclosed information is based upon preliminary data which
we have received from you. There may be factors unknown to
us which would alter the enclosed recommendation. These
recommendations are based on models and assumptions widely
-----u-s-ed-i n-t he-i nd-ust r y--. --Wh i:-1---e--w-e- a-t bemp-t-t o-keep-t h-e-s-e--cur-r-e-n-t ,-----
Aqua -Aerobic Systems, Inc. assumes no responsibility for
their validity or any risks associated with their use. Also,
because of the various factors stated above, Aqua -Aerobic
Systems, Inc. assumes no responsibility for any liability
resulting from any use made by you of the enclosed recommendations.
Copyright 1995, Aqua Aerobic Systems, Inc. 6

NANTAHALA
rifflagnalm
( The following design notes apply to the Pre-SBR treatment system:
- Pre-SBR treatment system unknown.
- pH will range from 6.5 to 8.5 as influent to the SBR
The following design notes apply to the SBR System:
FLOW:
- Assume flow is received over a 24 hour period.
- A maximum daily hydraulic flow of 2.00 times the average design has
been given.
- Maximum daily flow has been interpreted as a flow condition which does
not represent an increased organic load.
PROCESS/SITE CONDITIONS:
- An elevation of 1750 feet has been utilized.
DESIGN LOADINGS:
- The aeration system has been designed to provide oxygen for BOD at 1.25
lbs. 02/lb. BOD applied.
- TSS and TKN influent loadings have been assumed.
- The aeration system has been designed to provide oxygen for TKN at
4.60 lbs. 02/lb. TKN applied.
ANTICIPATED PERFORMANCE:
The Following Design Notes Apply to the Post-SBR Treatment System:
- Post SBR treatment unknown.
The Following Design Notes Apply to the Sludge Holding Basin:
- Preliminary digester sizing yields a required volume of 20,364 gallons
in order to achieve a 30 day sludge retention time. (Basin by others)
Page 1 of 2
Aqua Aerobic Systems, Inc.

-NANTAHALA-
The Following Equipment Notes Apply:
BASIN/EQUIPMENT
- Basin dimensions required have been provided in the design calculations.
Basins are not included in the pricing and are to be supplied by others.
- Assume adequate ventilation of tanks will be provided to allow for
utilization of standard electrical components.
- Assume gravity decant is achievable. Centerline of. decant will be
located 1.0 ft. below minimum water level.
- Recommend a minimum of 2.0 feet freeboard for AquaCAM-D.
PRICING
- Price includes freight, installation supervision and start-up
supervision.
- Pricing is based on our standard materials of construction and
electrical components.
Page 2 of 2
Aqua Aerobic Systems, Inc.

PRELIMINARY SBR DESIGN SUMMARY
JOB NAME: NANTAHALA OUTDOOR CENTER WWTP DATE: August 19, 1998
BY: RCM
SBR DESIGN PARAMETERS
AVG FLOW = 0.040 MGD MAX DAILY FLOW = 0.080 MGD
EFFLUENT (mg/1)
INFLUENT (mg/1) REQUIRED ANTICIPATED°
BOD5 600 BOD5 30.0 < 30.0
TSS 300 TSS 30.0 < 30.0
TKN 60 TKN N/R
°Anticipated Effluent Prior to Filtration.
F/M = 0.120 1/day MLSS = 4500 mg/1 CYCLES PER BASIN:
BASIN DIMENSIONS: 2, 21 X 12 FT RECTANGULAR BASINS
MAXIMUM VOLUME = 0.030 MG DECANT FLOW RATE = 320 GPM
HIGH WATER LEVEL = 16.0 FT
LOW WATER LEVEL = 11.8 FT
MAXIMUM
DECANT
HEIGHT =
4.2
FT
AVERAGE
DECANT
HEIGHT =
2.1
FT
HYDRAULIC RETENTION TIME AT LOW WATER LEVEL = 26.7 HOURS
LBS WASTED SOLIDS/LB BOD5 = 0.56 SLUDGE FLOW RATE = 45 GPM
(@ 3 minute/cycle/basin)
SBR EQUIPMENT
NUMBER SIZE
AQUA-CAMDS 2 15.0 HP (6in. hose)
SLUDGE VALVES 2 4 in. Diameter
INFLUENT VALVES 2 3 in. Diameter
CONTROL PANEL 1 Includes Motor Starters
Estimated Operating Power = 20.9 BHP (415 KW-hrs/day)
5.0
Copyright 1995, Aqua Aerobic Systems, Inc. 6

BASIS OF DESIGN FACT SHEET
A. GIVEN OR ASSUMED
Design Flow (Avg. 24 Hr.)--------------------------- 0.0400 M.G.D.
Maximum Daily Flow --------------------------- 0.0800 M.G.D.
° Design Loading
BODS------------,---------------------------- 600 mg/1
lbs. BOD5/day =
0.0400 M.G.D. x 600 ppm x 8.34 lbs./gal-------- 200 lbs/day
TSS---------=------------------------------- 300 mg/1
lbs. TSS/day =
0.0400 M.G.D. x 300*�;.ppm x 8.34 lbs./gal-------- 100 lbs/day
TKN----------------------------------------- 60 mg/1
lbs. TKN /day =
0.0400 M.G.D. x .60 ppm x 8.34 lbs./gal-------- 20 lbs/day
B. SITE CONDITIONS
Elevation Above Sea Level- =------------------------- 1750 feet
° Temperature of Waste,:
Summer Average --------------------------.-- 68 F (20.0 C)
Winter Average ---------------------------- 50 F (10.0 C)
Ambient Temperature:
Summer Average ---------------------------- 85 F (29.4 C)
Winter Average ---------------------------- 30 F (-1.1 C)
C. EFFLUENT CRITERIA
BOD5---------------------------------- 30.0 mg/1
TSS---------------------------------- 30.0 mg/1
D. ANTICIPATED PERFORMANCE (as monthly avg. prior to filtration)
BOD5--------------------------------< 30.0 mg/1
TSS--------=-----------------------< 30.0 mg/1
PAGE 1 ' 6

• AERATION SYSTEM
A. MIXAIR AQUA -AEROBIC, INC.., S.B..R. PROCESS
ts. DESIGN CRITERIA
1. BASIN 1.:
` a.
Rectangular, 211ft. by 12 ft.
b.
16.0 ft. SWD at' Maximum water level.,.
C.
11.8 ft. SWD at. Minimum water level.
d .
Normal range 11.: 8 ft.-.SWD to 13.9 f t . SWD at
Design Flow.
e.
Minimum of 26.7.hours of retention time at.Design Flow.
2. OXYGEN
a.
F:M = 0.120 1b..*BOD5/lb. MLSS.
b.
MLSS = 4500 ppm at low water level.
C.
MLVSS assumed to be 0.70 x MLSS:
d.
SVI = 100 ml/g after 60 minutes settling.
e.
1.00 lb. 02/lb. BOD5 at.,Peak,Conditions.
f.
1.25 lb. 02/lb. BOD5 at Design Conditions.
g.
4.60 lb. 02/lb. TKN Applied.
NOTE: During aerobic periods assume SBR operation
using 5 cycles per day per basin,
for a total of 10 cycles.
C. AERATION REACTOR CAPACITY REQUIRED
1. 200 lbs. BOD5
= 1,668 lbs. MLSS
0.120 lbs. BOD5/lb. MLSS
2. lbs. MLSS = Volume in M.G. x MLSS concentration
in ppm x 8.34 lbs./gal.
Assume 4500 ppm MLSS concentration at Minimum SWD
Volume M.G. =
1,668 lbs. MLSS
= 0.044 M.G.
4500 ppm x 8.34
= 5,942 cubic feet
PAGE 2 6

e
AERATION BASINS)
1. Use 2 rectangular basins, Dimensions: 21.0 feet by
12.0 feet by 16.0 feet SWD.
2. Actual Retention Time at Design Flow and 11.8 feet S.W.D..
5,947 cu.ft. x 7.48 gal./cu.ft. x 24
= 26.7 hr.
40,000 gpd
3. Actual Retention Time at Maximum Flow and 16.0 feet S.W.D.:
8,088 cu.ft. x 7.48 gal./cu.ft. x 24
= 18.1 hr.
80,000 gpd
E- AIR REQUIREMENTS
1. Oxygen Requirements
a. 02 Required for BOD5 = 200.2 lb. BOD5
per day x 1.25 lbs. 02 per lb. BOD5
= 250.2 lb. 02 per day.
b. 02 Required for TKN = 20.0 lb. TKN
per day x 4.60 lb. 02 per lb. TKN
92.1 lb. 02 per day.
C. Total 02 required = 342.3 lbs 02 per day A.O.R.
d. Actual Oxygen Requirement
Total 02 Required, lbs/day
A.O.R. =
Aeration time, hrs/day
342.3 lbs 02/day
3.4 hrs/cycle x 5 cycles/day/basin x 2 basin(s)
10.1 lbs/hr/Basin
PAGE 3 ' 6

,Y
2' . Field 02 Transfer Rate and HP Requirements
T-2b
CWTR[(Cs*P)-Cr](1.024) (a)
FTR =
9.09
Where,
CWTR
= Clean Water Transfer Rate at Standard
Conditions (lbs 02/BHP-Hour)
= 1.30 lbs 02/BHP-Hour
T
= Temperature of Wastewater at Design
Conditions, Degrees Centigrade
= 20.0 Degrees Centigrade
Cs
= Saturation Concentration of 02 at Design of 20.0
Degrees Centigrade and at 1,750 Feet Elevation
= 8.50 mg/1
13
= Saturation Correction Coefficient
= 0.95 (Typical, Assumed)
Cr
= Residual D.O. Concentration to be Maintained
= 2.00 mg/l
a
= 02 Transfer Rate Correction Coefficient
= 0.85 (Typical, Assumed)
FTR
= 0.74 lbs 02/BHP-Hour (Design Condition)
Therefore,
10.1 lbs 02/Hour/Basin
HP(02 Demand)
0.74 lbs 02/BHP-Hour
= 14 BHP/Basin
= 15 NPHP/Basin (Design Condition)
Recommend: 1 - 15.0H.P. Aqua-CamD Aerator(s)/Basin
3. Aerator Operating B.H.P. at Design Condition
13.8 BHP/bsn x 2 basin(s) x 18.2 mix -aerate hrs/d/bsn
OP. BHP =
24 hrs/day/bsn
20.9 BHP
PAGE 4 6

F. .MIXING DEMAND WITH SURFACE ASPIRATORS
1.• Design for a mixing level of 456.2 BHP/MGal at maximum water level.
Recommend: 1 - 15.0 H.P. Aqua Camd
r,.
per basin to completely mix aeration basins.
III SLUDGE AND DECANTER PUMP CALCULATIONS
A. Sludge Flowrate
1. lbs. of, sludge per day = 200 lbs. BOD5 per day x 0.56 lbs.
of sludge produced per lb. of BOD5 applied = 113 lbs.
2. sludge flowrate = (lbs. sludge per day/sludge concentration)/8.34
_ (113/0.01)/8.34 = 1,354 GPD
B. Sludge and Decanter Flowrate at Design Conditions
Design Flowrate = MDF / (NB x NCB x MCT)
Where_:
MDF = maximum daily flow for decant (0.080 MGD) or
sludge waste (1,354 GPD)
NB = number of basins (2)
NCB = number of cycles per day per basin ( 5)
MCT = maximum cycle time for decant (25 min) or sludge waste (3 min)
1. Sludge Flowrate at Design Conditions
Sludge Flowr.ate- = 1,354/(2 x 5 x 3) = 45 GPM
2. Decanter Design Flowrate at Design Conditions
Decant Flowrate = 80,000/(2 x 5 x 25) = 320 GPM
For gravity decanters 320 GPM would be the average flowrate..
The actual flowrate would vary depending on -the driving head
available at the time.
C. Sludge and Decanter Pump Horse Power
Pump BHP = (flowrate x head) / (3960 x efficiency)
1. Sludge Pump, Gravity flow, no pump required
2. Decanter, Gravity flow, no pump required
PAGE 5 ' 6

D. ,Operating B.H.P. At Design Conditions
.i
l Cycle Time = ADF / (NB x NCB x DFR x 60)
Where:
ADF = average daily flow for decant (0.040 MGD) or
sludge waste (1 254 GPD)
DFR = design flow rate for decanter (320 GPM) or
-'_udge waste (45 GPM)
MOTOR LIST
NUMBER SIZE TOTAL HP BHP REQ'D
EQUIPMENT MOTORS NPHP INSTALLED AT DESIGN
AQUA-CAM(D) 2 15.0 30.0 20.892
2 30.0 20.892
° OP KW-hrs/day = (20.892 BHP x 0.7457 KW/HP x 24 hrs/day)/0.90
= 415 KW-hrs/day
Note: An overall motor efficiency of 90% is assumed.
PAGE 6
Copyright 1995, Aqua Aerobic Systems, Inc.