NCG551744_Application (ATC)_20171127

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ROOKS
ENGINEERING ASSOCIATES NOV L Q 20I7 E
17 Ar31n0ioA Mat)AshwiN NC MI 1 wwwhroo&sea.aw 187-M-4700 F
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Latter of Transmittal-
To: From: Date:
NCDEQ Mark C. Brooks. P.E. November 27,2017
Division of Water Quality
Water Quality Permitting Section cc: (tweed telephone no. ifFedex, too P.O, Box)
1617 Mail Service Center
Raleigh„NC 27699-1617
Tim Heinz
Attn: Charles Weaver NCDEQ Asheville Regional Office
2090 Us Hwy 70
need tele hone no. a Fedex,no P.O.$ox Swannanoa,NC 28778
Project Name
Bunch SFR Discharge Permit Wendell Bunch
Project No: 702 Crescent Circle
456217 Kings Mountain,NC 28086
Mail Deliver Overnight* Other
must use strcet address&include phone number
Document Description: Date: Copies:
Cover Letter with Attachments 11/27/17 Original&2 copies,copy
CCs
Application for Coverage Under NCG550000 11/27/17 Original&2 copies, copy
CCs
Check for$60 1
Engineering Plans 11/27/17 Original&2 copies, copy
CCs
Engineers Report,including Specifications 11/3/16 Original&2 copies, copy
CCs
Comments:
Please let us know if anything missing.Thanks. t
ieville,NC 28801 • Phone[phone] • Fax[phone]
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Planning & Project Management J Civil Engineering
Surveying / Environmental Engineering & Services
W'I KS 17 Arlington Street 1 Asheville NG 288111
ENGINEERING A S S C C I AT E 9 www.brooksoo.com l 828-232.4700
November 27,2017
NC DENRIDWRIWater Quality Permitting Section
1617 Mail Service Center NOV 2 8 2017
Raleigh,NC 27699-1617
i
Attention: Charles Weaver
II
Regarding: Cover Letter&Alternatives Analysis
Bunch Residence SFR NPDES Application
Avery County
BEA Project No. 456217
Dear Mr. Weaver:
On behalf of Wendell&Karen Bunch,BEA is submitting the attached Notice of Intent for
coverage under NCG550000. This Cover Letter is intended to provide a narrative description
of the project and serve as the request for the Authorization to Construct.
Pro ect Descr'i7ItiM
The property is a very small parcel located at the intersection of Henson Creek and the North
Toe River in Avery County. The owner has placed a park model unit on the site as a
weekend/summer retreat. He tried to obtain a septic permit from the County Health
Department but was denied. He later tried to engage a soil scientist to permit an alternative
septic system or residential irrigation system. Insufficient room was found for the system.
Refer to attachments for the soil scientists evaluation and the rejected septic permit
application from Lee Clark with Avery County.
Mr. Bunch is proposing to install an Orenco AX20 RTU unit with UV disinfection to treat
the wastewater from his park model for discharge in to Henson Creek near the confluence of
the North Toe River.
Alternatives Feasibility
a) This area of Avery County is not served by any public or private sewer systems. Refer to
Attachment D for a map of the nearest permitted sewer collection systems per NC
OneMaps. The nearest collection system is over 5 miles away. It would be impossible
from a permitting standpoint and economically infeasible to connect to any of the
existing permitted sewer treatment plant systems.
b) A Septic System Rejection Letter from the Avery County Environmental Health
Department for a repair septic permit is provided as Attachment A.
c) Provided as Attachment B is a letter from a NC Licensed Soil Scientist that the site is
unsuitable for any type of onsite system(including subsurface drip or irrigation)due to
space limitations.
d) Over the last two years Mr. Bunch has solicited all of his adjacent neighbors in an
attempt to purchase land or an easement for a septic system. He has been turned town for
offers of over$30,000 for less than%a acre.
Receiving Waters
The receiving water is Henson Creek, a WS-V Trout Stream. There are no know restrictions
for Henson Creek or this section of the North Toe. The 7Q10 report from the USGS is
provided as Attachment C. Approximate LatfLong of the discharge location would be Lat
36.0236361Lon-82.023222
Enclosed with this Cover Letter and request for the Authorization to Construct are three sets
of sealed plans and specifications and a fee check for$60. We appreciate your review of this
application. We look forward to working with you on this project.
Sincerely,
Brooks Engineering Associates,P.A.
Mark C.Brooks,P.E.
Enclosed: Fee Check for$60
3 sets of Engineering Plans
Attachments:A—Documentation from Macon County Iiealth Department
B—Letter for Licensed Soil Scientist
C—7Q10 documentation
D—Map of closest permitted sewer systems per NC OneMaps
ATTACHMENT A
County Denial Letter
4d .TI.Tj
Receipt 9t# 1 I J 13
Survey plat to scale+submitted
Scaled*site plan aahunitted
PIN, ,,,1 S9P AI /1 -6 /.._P°),9- o' Q[Unsealed site plan submitted
Toe River Health District acate of 1" no mom than 6u'
Application for Improvement Permit anchor Authorization to Construct
11TmprovemeutPermit ElAuthorization to Construct
IF THE MIFORNAMON IN T E lit
ALTMD.THEN TUB RffAQyUHNTS PEM AND AUTHORIZA11710ri TO CQNMM= C Ili&
ineradilmyAlld o complete site plan-60]nontim, complete plal a
without expiration} 1 AZ61&
APPLICANT INFORMATION
fix'A elf e:7 oz'•4•r e, Wl* 111Z 2 9-.619
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Applicant Address Home& ark Phone 5.'1 7.L j,;Z 1
Owner Address Rome&Work Phone
RUY L...................Date originally deeded&r+ecorvled. ....
57_7_r f WS' 0
Street Address Subdivision Name Section/Phasse/Let#
Dlrectlons to slier 6 t o?A/otsize .424
4.1f1k e
de ig]SlIecilleatlo
13 Now Single Family Residence Maximum number of bedrooms: T
B Expansion of Existing System If expansion: Current number of bedrooms.
13Repair to Malfunctioning Sewage Disposal System Will[here he a basement? 1"J yes o ,1 PMNon-Residential Typo of Structure Plumbing fixtures in Basement IN yes no
Addition to structure requiring building permit .//,,j,,Square footage of residence: 4PA44le--
13 Verification orexisting septic system /y,-Its-f7 aximumwll ofoccupents.
W
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Non-Residential Specifications:
Type of business: Total Square footage of Building;
Maximum number of employees: Maximum number of seats:
r .......-—-ti..
Waler Supply: Are thecae any existing wells,springs.or existing waterlines on this property? t3 yes 1315o
13 New well 13 Existing Well M Community Well 13 Public Water spring
If ap ing for Authorization to Construct:
rye Indicate Desired System Type(s)(systems can be ranked in order of your preference)
Any Accepted Alternative —Conventional Innovative —Other
The Applicant shall notify the local health department upon submittal of ibis application if any of the following apply to the property in question. if
the answer to any question is'W,applicant must attach supporting documentation.
17 Yes IM No Does the site contain any jurisdictional wetlands?
17 Yes no Does the site contain any existing wastewater systems?
Yes J31 No Is any wastewater going to be generated on the site other than domest€e sewage7
13 Yes ©No Is the site subject to approval by any other public agency?
M Yes VI'Vo Are there any casements or right of ways on this property?
13 Yes XMo Has any gradln&removal or addition of soil been done to this property?(Please desorlbo on back)
I have real]this application and certify flint the information provided herein is true,complete and correct. Authorized county and state
offleiais are granted right of entry to conduct necessary inspections to determine eampilance with applicable laws and rules. I understand
that I am solely responsible for the proper ldentificatioa and labeling of all property lines and corners and making the site accessible so that
it complete site evaluation eon be performed.
Property owner's oi owner's legal representative'*signature(required) orDato
Must provide documentation to support claim as owner's legal representative.
Office Use Only
Date appointment made: Date of appointment:
Date flagged: of site visits:
Revised:6/20111
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MITE PLAN WOIttKS13E
Place a mark(X)beside each item that has been Indicated on your site plan,Incomplete site plans wlll be returned to you for .
completion.Remember: Your property will not be scheduled for an evaluation until we have received a completed application,
site plan,and all proposed items are marked on the property.
The dimensions of the property. k ` 5
Rey
y The proposed location of all structures(e.g..f'acillty,wells,water lines,outbuildings,pools).Show the distances
from the road and the side property line to all atructures.Be sure and give the dimensions for all the structures.If
you are unsure as to the structure size,please show the dimensions of the MAXIMUM area of the lot that you
anticipate the structure will cover.
The site you would prefer your septic system to go In. gay
The preferred driveway location.
r',,0 4 - The proposed well location.
A north arrow or other sufficient directlonal l rid loator.
NIA Any proposed structures or improvements to the property such as garages,workshops,pools,etc.If there are
none,circle"NIA"
NIA The location of any existing septic tank systems and wells on your property and on the adjoining property within
100'of your property IInc.If there are none,tircle"NIA".
NIA The I cost Ion of any easements or rlghis of way on the property.if there are none,clrele"NIA".
NIA The Ideation of any designated wetlands on the property.If there are none,circle"NIA"
USE THIS SPACE TO DRAW YOUR SITE PLAN:
Revised:&ZO/I1
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TOE RIVER HEALTH DISTRICT
Avery, Mitchell. &Yancey County jaHealthDepartmentsNn' ;
P. f
Diane Creek, NSW Charles Baker,MD&Frank Cra1g,MD Marvin Walker,OD
Acting Health Director Medical Directors Chair,Hoard of Health
Date rtily 2,.,2017 ,
Re: A lication rforIrn nt Permit for Wendell, Bunch Averyppprf p property site Health
Department file number
5
Dear Mr. Bunch Owner or Owner's Agent)
TheAvery County Health Department,Environmental Health Division on(date)evaluated the
above referenced property at the site designated on the plat/site plan that accompanled your improvement permit
application. According to your application the site Is to serve a camper/RV describe facility—example: 3 .
bedroom residence,10 employee office)with a design wastewater flow of 120 gallons per day. The
evaluation was done In accordance with the laws and rules governing wastewater systems in NC General Statute 130A-333
Induding related statutes and Title 15A,Subchapter 2K of the NC Adminlstrative Code,Rule.1900 and related rules.
Based an the criteria set out In Title 15A,Subchapter 18A,of the NC Administrative Code,Rule.1940 through.1948,the
evaluation Indicated that the site Is UNSUITABLE for a sanitary system of sewage treatment and disposal. Therefore,we
must deny your request for an Improvement permit. A copy of the site evaluation'is enclosed. The site is unsuitable based
on the fallowing:
Unsuitable soil topography and/or landscape position(Rule.1940)
Unsuitable soil characteristics(structure or clay mineralogy)(Rule,1941)
Unsuitable soli wetness condition(Rule.1942)
Unsuitable soil depth(Rule.1943)
Presence of restrictive horizon(Rule.1944)
X Insufficient space for septic system and repair area(Rule.1945)
x Unsuitable for meeting required setbacks(Rule.1950)
Other(Rute.1946)
These severe soil or site limitations could cause premature system failure,leading to the discharge of untreated sewage on
the ground surface,Into surface waters.directly to ground water a Inside your structure.
The site evaluation included co n sl de ratio n of posslbie site modifications,as well as use of modified,Innovative,or
alternative systems. However,the health Department has determined that none of the above options will overcome the
severe conditlons on this site. A possible aptlon might be a system designed to dispose of sewage to another area of
suitable soil a aff-site to additional property.
ups Enmr&W the conditions that allow the people of Avery,Mitchell and Yancey Counties to be Healthy
r 861 Greenwood Road,Spruce Pine,NC 28777 828.737.6100uarviF
TOE RIVER HEALTH DISTRICT
Avery, Mitchell, IN Yancey county
Health Departments
NurlhhCrogggge
F'A Hneo[tfi
Diane Creek, MSW Charles Baker,MD&Frank Craig, MD Marvin Walker,OD
Acting Health Director Medical Directors Chair,Board of Health
For the reasons set out above,the property Is currently classified UNSUITABLE,and no Improvement permit shall be Issued
for this site in accordance with Rule.1948(c).
Note that a site classified as UNSUITABLE may be classified as PROVISIONALLY SUITABLE if written documentation is
provided that meets the requirements of Rule.1948(d). A copy of this rule Is enclosed. You may hire a consultant to assist
you If you wish to try to develop a plan under which your site could be reclassified as PROVISIONALLY SUITABLE.
You have a right to an Informal review of this decision. You may request an Informal review by the soil scientist or
environmental health supervisor at the local health department. You may also request an Information review by the NC
Department of Health and Human Services regional soli scientist. A request far informal review must be made in wrlting
to the local health department.
You also have a right to a formal appeal of this declslon. To pursue a formal appeal,you must file a petition for a
contested ease hearing with the office of Administrative hearings,6714 Mail Service Center,Raleigh,NC 27699-6714. To
Set a copy of a petition form,you may write the Office of Administrative Hearings or call the office at(919)431-3000 or
download it from the OAH web site at http://www.ncoah.com/forms.htmi. The petition for it contested case hearing
must be filed in accordance with the provislon of NC General Statutes 130A•24 and 154E-23 and all other applicable
provisions of Chapter 150B. NC General Statute 13DA-335(g)provides that your hearing would be held in the county
where your property is located.
Please note:If you wish to pursue a formal appeal,you must file the petition form with the office of Administrative
Hearings WITHIN 30 DAYS OF THE DATE OF THIS LETTER. The date of this Ietter is;-717117 Meeting the 30 day
deadline is critical to your formal appeal.
If you file a petition for a contested case hearing with the Office of Administrative Hearings,you are required by law(NC
General Statute 1508-23)to serve a copy of your petition on the Office of General Counsel,NC Department of Health and
Human Services,2001 Mall Service Center,Raleigh,N.C.27699-2001.
Do not serve the petition on your local health department. Sending a ropy of your petition to the Iocai health department
will nat satisfy the legal requlrement In INC General Statute 1500-23 that you send a copy to the Office of General Counsel,
NC Department of Health and Human Services.
You may call or write the local health department If you need any additional Information or assistance.
Sincerely,
Ensuring the cvndltlonr that allow the people of Avery,Mitchell and Yancey Countles to 6e Healthy
may=861 Greenwood Road.Spruce Pine,NC28777 8.28,737.6100
ATTACHMENT B
Letter from NC Licensed Sail Scientist
LAND RESOURCE MANAGEMENT
Land Evaluation by Land Experts
PO BOX 9251, ASHCVILt.E. NC 26815 11 620.231.1663 11 WWW.LANDRM.Cgrul
July 18, 2017
Wendell Bunch
702 Crescent Circle
Kings Mountain NC 28086
Regarding; Report of Findings Soils Evaluation
PIN# 180419611028
Avery County,NC
LRM Project#32120
Dear Mr.Bunch,
On June 12,2017,Aaron Winters of Land Resource Management,PLLC(LRM)conducted a soil and
site investigation on Avery County PIN#180419611028. The purpose of the soil and site
investigation was to determine any available options for an on-site wastewater septic system to
service a Recreation Vehicle(RV).The lot had been previously denied an improvement permit by the
Toe River Health District.
Recommendations are based on,but not limited to,observations made and data collected on
topography,landscape position,parent material,underlying geology, and soil characteristics. Soil
characteristics include,but are not limited to,depth to a seasonal high water table(SHWT),depth to a
restrictive horizon,total soil depth,soil horizonation,soil structure,soil color,clay mineralogy,bulk
density,consistence,plasticity,stone content,and percent sand,silt,clay,and mica. They follow the
guidelines set forth in the North Carolina Laws and Rules for Sewage Treatment and Disposal
Systems,laws amended effective October 1,2011.
RESULTS AND DISCUSSION
LRM found the lot to be unsuitable for any subsurface or surface on-site wastewater disposal
septic)system. The limiting factors are lack of available space and unsuitable soil
conditions. The lack of available space results from an inadequate area available once
setback requirements have been met from a perennial stream and existing culvert(also
containing a second perennial stream).Also,the soils are non-native(fill material)and
extremely stony containing greater than 50%rock fragments,an unsuitable soil condition,
Therefore,LRM concludes that there is no subsurface or surface septic system available for
this lot.
LRM appreciates the opportunity to provide this report.Please do not hesitate to call with any
questions or concerns.
Sincerely, f
F SOX
S
Walker Ferguson,LSS
President,Ladd Resource Management,LLC
LRM
Project#32120 i209
ATTACHMENT C
7Q10 Report
Mark Brooks
NMI
From: Weaver,John [e-mail]>
Sent: Friday, November 17,201710:48 AM
To: Mark Brooks
Cc: Jeanne Robbins,John C Weaver
Subject: Response from USGS concerning...Re:7Q10 Info Needed for NPDES Permit
Mr.Brooks,
In response to your inquiry about the low-flow characteristics for Henson Creek just upstream from its mouth(also U.S Highway 19E)at
Spear in western Avery County,the following information is provided:
A check of the low-flow files here at the USGS South Atlantic Water Science Center(Raleigh office)does not indicate a previous low-flow
determination at the specific point of interest identified by the lat/long coordinates(36.023636,-82.023222)provided in your email dated
November 8,2017.
No USGS discharge records are likewise known to exist for the point of interest.
In the absence of site-specific discharge records sufficient for a low-flow analysis,estimates of low-flow characteristics at ungaged locations
are determined by assessing a range in the low-flow yields(expressed as flow per square m1le drainage area,of cfsm)at nearby sites where
such estimates have previously been determined.
A basin delineation completed using the online USGS Stream Stats application for North Carolina
htt ://water,us gs. ov/osw/str cam stats/north carvlina.html indicates the drainage area for the point of interest on Henson Creek
lat/long 36.02363,-82.02322)is 5.32 sgmi.
For streams in Avery County,low-flow characteristics published by the USGS are provided in the following reports:
1)The first is a statewide report completed in the early 1990's. It is USGS Water-Supply Paper 2403,"Low-flow characteristics of streams
in North Carolina"(Giese and Mason,1993). An online version of the report is available at http://pubs.usgs.gov/wsp/2403/report.pdf The
report provides the low-flow characteristics(based on data through 1988)via regional relations and at-site values for sites with drainage
basins between 1 and 400 sgmi and not considered or known to be affected by regulation and/or diversions.
2)The second is a statewide report published in March 2015. It is USGS Scientific Investigations Report 2015-5001,"Low-flow
characteristics and flow-duration statistics for selected USGS continuous-record streamgaging stations in North Carolina through 2012"
Weaver,2015). The report is available online at http://pubs.usgs.gov/sir/2015/5001/. The report provides updated low-flow characteristics
and flaw-duration statistics for 266 active(as of 2012 water year)and discontinued streamgages across the state where a minimum
of 10 climatic years discharge records were available for flow analyses.
Inspection of the above reports indicates the presence of six(6)nearby selected USGS partial-record sites(4)and continuous-record
streamgages(2)in general vicinity of the point of interest where low-flow characteristics were published. Among these 6 sites,the low-flow
discharge yields for the indicated flow statistics are as follows:
Annual 7Q 10 low-flow yields from 0.16 to 0.45 cfsm(average about 0.35 cfsm)
Annual 30Q2 low-flow yields from 0,36 to 0.84 cfsm(average about 0.69 cfsm)
Average annual discharge yields==>from 1.5 to about 2.9 ofsm(average about 2.3 cfsm)
Application of the above range in yields to the drainage area(5.32 sgmi)for the point of interest results in the following estimated law-flow
discharges:
Annual 7Q10 discharges from 0.85 to 2.4 cfs(average about 1.9 cfs)
Annual 30Q2 discharges from 1.9 to 4.5 cfs(average about 3.7 cfs)
Average annual discharge==>from 8.0 to 15.4 cfs(average about 12.1 cfs)
Please note the estimated flows are provided in units of cubic feet per second(cfs).
1
Please understand the information provided in this message is based on a preliminary assessment and considered provisional,subject to
revision pending further analyses.
Hope this information is helpful.
Thank you.
Curtis Weaver
J.Curtis Weaver, Hydrologist,PE Emall:kweaverbusgs.00v
USGS South Atlantic Water Science Center Online.,hMmullwwwus*saovlcenterslya-water
North Carolina-South Carolina-Georgia
3916 Sunset Ridge Road
Raleigh,NC 27607
Phone:[phone] // Fax:[phone]
On Wed,Nov 8,2017 at 12:59 PM,Mark Brooks<mbrookst a7,brooksea.com>Wrote:
Mr. Weaver—
I would like to request 7Q10 information on Henson Creek in Avery County. Location is
Lat 36.023636
Lon-82.023222
Thank you for your assistance!
Mark C. Brooks,F.E.
Brooks Engineering Associates,F.A.
17 Arlington Street
Asheville,NC 28801
fI28 4700
El7rilt4F-RIWO X6130aiATF-h
2
ATTACHMENT D
Regional Sewer Map
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FIGURE 1
GENERAL SITE LOCATION
Scale as shown on lower left.
Shown are the locations of the nearest public sewer collections systems per NC OneMaps.
1
Division of Water Resources FOR AGENCY USE ONLY
National Pollutant Discharge Elimination System NPDY S) Date Received
NCDENR Application for Coverage Under General PermitYear i°nt nay
NCG 55000 o
Certificate of Coverage
Single Family Residences andlor facilitles discharging O 5 S
1000 gallons per day of domestic wastewater deck# Amount
NOTICE OF INTENT Assigned To:
Required by 15A NCAC 02U.0jL7ddi;[term definition see 15A AC Q2H,a103 19
Press TAB to navigate form)
1. Regional Office contact(Please note: This application will be returned if you have not met with a
representative from the appropriate regional office.)..
Please list the NCDENR Regional Office representatives)with whom you have met:
Nacne(s): Tim Helm Data: 11/8/2017
2. Mailing address of ownerloperator: (address to which all correspondence should be malled)
Owner Name Wendell&Karen Bunch
Street Address 742 Crescent Circle
City Kings Mountain State NC Zip28086-
Telephone#(H) Telephone#(W)
CelVMobile# 704-477-2621 Email [e-mail]
3. Location of facility producing discharge: (Iffacility is not yet conslrttcted,give street address or lot 4)
Street Address 5735 South US Hwy 19E
City Too River Township State NC Zip
County Avery
Telephone# Call/Mobile#
4. Physical location information:
Please provide a narrative description of hory to get to the facility(use street names,state road numbers,and distance
and direction from a roadrvay intersection). T ke US HNvv 1 E North&Qm Spruce Pine,.,property onnki way
across from Henson Creek Road,
S. This NPDES permit application applies to which of the following:
New[term definition see 15A NCAQ 2 43 1 or Proposed(system not constructed)
Existing[term definition see I SA NCAC 0213.01p3 1}l;If previously permitted by local or county health
department,please provide the permit number
and issue date Click here to enter a date,i fc li ill[;C:S
Modification;please describe the nature of the modification:
r
NOV 2 8 2017
tiry alr,r
Page 1 of 4 Revised 911113
NCG550000 New Application
b. Description of Discharge; [Required by 15A NCAC 02H.0145W(j)]
a) Amount of wastewater to be discharged:
Number of bedrooms a x 120 gallons per bedroom
W gallons per day to be permitted
b) 'Type of facility producing waste(please check one):
Primary residence Vacation/second home
Other.
7. Please check the components that comprise the wastewater treatment system:
Required by 15A NCAC 02H.0105(g)Q)
Septic tank Dosing tank
Primary sand filter Secondary sand filter ®Recirculating sand filter(s)
Chlorination Dechlorination Other form of disinfection:
Post Aeration(specify type)
S. For new or proposed systems only-Please address the feasibility of alternatives to discharging for the
following options in the cover letter for this application;
Evaluation required by U.& 143-215.1(b)(55)(a)and 15A NCAC 02H.0105(cc)(2)1
a) Connection to a Regional or Municipal Sewer Collection System,
b) Letter from local or county health department describing the suitability or non-suitability of the site for all types of
wastewater ground adsorption and innovative non-discharge systems.Document the repair potential of the failed
system,
c) Land Application such as spray irrigation or drip irrigation.
9. Receiving waters: [Required by 15A NQAQ 02H.0105(c)(1))
a) What is the name of the body or bodies of water(creek,stream,river,lake,etc.)that the facility wastewater
discharges end up in? Henson Creek
b) Stream Classification(fkrlown): WS-V Tr
10. The application must include the following or it will be returned,as allowed by 15A C 2
a) For Certificates Covera e:
An original letter and two(1)copy requesting coverage under NC0550000.
A signed and completed original and one copy of this Notice of Intent Application.
A check or money order for the permit fee of$60.00[per G.S.¢143-, 3 a }b)]made payable to NCDENR.
Invoice showing that the septic tank has been pumped and serviced within the last 12 months(only when
existing service tank will be used).
Page 2 of 4 Revised 911113
NCG550000 New Application
New orproposedfacilities must also hielrrcle:
Letter from the county health department evaluating the proposed site for all types of ground absorption and
innovative non-discharge systems.Document the repair potential of the failed system.
Evaluation of connection to a regional sewer system(approximate distance&cost to connect),
Provide a 7Q10 flow estimate at the proposed wasteivater discharge point from the US Geological Survey(919-
5714000)
b) For an Authorizationto Construct(ATC)only: (Note: There is ga fu for an ATC)
A letter requesting an ATC
Three sets of plans and specifications(required by 15A NQAQ 02H 8)of proposed treatment system(see
Permit Application Checklist and Design Criteria for Single Family Discharge)
Invoice showing that the septic tank has been pumped and serviced within the last 12 months(only when existing
septic tank will be used).
Additional Application Requirements:
a) If this application is being submitted by a consulting engineer(or engineering firm),include
documentation from the applicant showing that the engineer(or film)submitting the application has
been designated an authorized Representative of the applicant,per 15A NC C 138 b 1 .
b) If this application is being submitted by a consulting engineer(or engineering firm),final plans for the
treatment system must be signed and sealed by a North Carolina registered hnfossional ig•neer and
stamped-"Final Design-Not released for construction;"per 15A CA 02H.0139.
c) If this application is being submitted by a consulting engineer(or engineering firm),final specifications
for all major treatment components must be signed and sealed by a North Catalina registered
Professional Enincer and shall include a narrative description of the treatment system to be
constructed;per 1SA CAC 02H 139,
Page 3 of 4 Revised 911113
NCG5501106 Now Application
CERTIFICATION
I certify that I am familiar with the information contained in this application and that to the best of my
knowledge and belief such information is title,complete,and accurate,
Printed Name of Person Signing; Wendell Bunch
Title:
Please review 15A NCAC 02H.0i e for authorized signing officials)
z/-' Click here to enter a date.
Signature ofApplicant) Date Signed)
North Carolina General Statute§-143.-215, provides that:
Any parson who knowingly makes any false statement representation,or certification in any application,record,report,plan,or other
document Filed or required to be malntalned under this Article or a rule Implementing this Article;or who knowingly makes a false
statement of is metals]fact in a rutsmaking proceeding or contested case under thisArticle;or who falsifies,tampers with,or knowingly
renders Inaccurate any recording or monitoring device or method required to be operated er maintained urider this Artlols or ruIs$of
the Commission Implarnsnting this Article,shall be guilty of s Class a misdemeanor which may Indude a fine not to exceed.ten
thousand dollars($10,000). 1 B U.S.Q. lon i 0 provides a punishment by a fine or Imprisonment not more than 5 years,or both,
for a slmllar offense.
ApplicaAlminust be accompWed by a check or money order for$60 00 iper!Q.S.§ 143-215.3(a[lb l
Made pay0}l-to:
NCDENR
i i • +
Mail this application and one copy of the entire package(with check)to:
NC DENR 1 DWR 1 Water Quality Pernutting Section
1617 Mail Service Center
Raleigh,North Carolina 27699-1517
Attn: Charles Weaver
Note: The submission of this document does not guarantee the Issuance of an NPDES permit
Palle 4 of 4 Revised 911113
f,—, Planning & Project Management / Civil Engineering
Surveying / Environmental Engineering & Services
BROOKS 17 Arlington Street / Asheville NC28001
EN93INE£RINQ ASSOplATES vwabrookseaxorn / 02.0-232-4788
NSITE WASTE WATER SYSTEM
FOR 5IN13LE FAMILY 17I80HARGE
BUNCH PROPERTY
S735 SOUTH US HI13HWAY 19E
TaE RIVER TOWNSHIP, t4ORTH CAROLINA
ENGINEER'S REPORT
lnlcLuolNoc
SPE'CIFICArwNS, CALGLILATIONS & PRI70LCT SLIRMITTAL SHEETS
PREPARED FOR.
WENDELL & KAREN SUNUM
7132 CRESgENT CIRCLE
KINSS MCIIJNTAIN, NC 2B0a6
lays
ISROOKS FNOINEERINS ABaCOIATEs, P.A.
BROOKa EN13114EERINR ABsuciATEs PROJEUT No.! 451521 7
ORIGINAL1 NOVEMBER 15, Z017
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TABLE OF CONTENTS
1.0 System Summary& Project Information..............................................................................'I
1.1 Project Summary............................................................................................. 1
1.2 Design Flow and Influent Characteristics......................................................... 1
1.3 Contacts.......................................................................................................... 1
1.4 Scope &Qualifiers........................................................................................... 1
2.0 Collection System &General Conveyance Piping.............................................................3
2.1 Location of Sanitary Sewage Systems............................................................. 3
2.2 Sewer Line General Specifications.................................................................. 3
3.0 WastewaterTreatment ...................................................................................... 9
3.1 Primary Treatment System ................................................................................ 9
3.2 Aerobic Pretreatment System............................................................................ 9
3.3 Post Aeration Apparatus............................................ 12
4.0 Site Preparation.........................................................................................................................13
4.1 Clearing & Grubbing .........................................................................................13
4.2 Seeding & Mulching.... .....................................................................................13
6.0 Inspection And Monitoring Proceedings............................................................................16
5.1 Pre-Construction Meeting.................................................................................16
5.2 Intermediate Inspection of the System..............................................................16
5.3 Final Inspection &Start-Up.................................................. ......................16
5.4 Regular Monitoring ...........................................................................................17
5.5 Residuals Management....................................................................................17
6.0 Calculations
6.1 Buoyancy Calculations
7.0 Manufacturer Cut-Sheets
7.1 Tanks
7.2 Orenco AX20 RTU Brochure
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1.0 SYSTEM SUMMARY& PROJECT INFORMATION
1.1 Project Summary
This Engineer's Report and accompanying Engineering Drawings are for a new onsite
wastewater system to serve a one bedroom park model unit located at 5735 South US
Highway 19E in Avery County (PIN 180419611028). The system is designed for compliance
with the state General NPDES Permit for Single Family Residences NCG550000,
The proposed wastewater treatment system consists of a septic tank, Orenco AX20RT
aerobic treatment system with UV disinfection and a post-aeration apparatus. Section 7.0
includes system components' product specification (cut) sheets, The system's performance is
document by NSF Certification for NSF/ANSI Standards 40. Any use of"equivalent products"
shall first be approved by the Project Engineer prior to installation.
1.2 Design Flow and Influent Characteristics
The system is designed for domestic strength raw wastewater from the Inn facility, The
design flow is based upon 120 gpd per room in accordance with 15A NCAC 02T .0114
wastewater design flow rates with a two bedroom minimum flow rate.
1.3 Contacts
Engineer: Mark Brooks, PE, Brooks Engineering Associates 828-232-4700
Owner Contact: Wendell Bunch 704-477-2621
Pretreatment System Representatives: Michael Clayton, AQWA 252-292-1667
1.4 Scope& Qualifiers
This specifications manual is intended only for the use of permitting and construction of the
intended wastewater treatment system. Any changes to these plans and specifications shall
be approved by the Project Engineer, Any changes in layout of equipment not approved shall
release the Engineer from any potential liability associated with the system.
The maintenance and operation of the system are to be in accordance with the Operation &
Maintenance Plan provided as a separate document. if the system is not operated and
1
maintained in accordance to manufacturer recommendations and documented as such any
warranty may be voided.
Notify Engineer in sufficient time to permit inspection of underground work before backfilling is
begun. A final inspection shall be required with the Owner, Engineer, NCDEQ representative,
and Contractor. Only the set of engineering plans with revision labeled "RELEASE FOR
CONSTRUCTION" shall be utilized for construction.
All construction lines shall conform to the latest County and State of North Carolina
specifications as defined by Standards and Specifications and the North Carolina Building
Code. Where two (2) standards conflict, the more stringent shall apply.
In the event that the Contractor or another supplier proposes an alternate component to the
specified manufacturer or component type, certain procedures must be followed. If proposing
an alternate, the Contractor(supplier) must submit, no less than 15 business days in advance
of the bid date (if during the bid review period) or 15 days prior to the need for installation. if
needed, the contractor must provided a system hydraulic analysis based on the proposed
component (including pipe sizes, flows, velocities, retention times, etc.), a list of exceptions to
the governing specifications herein and/or demonstration of compliance t of these
specifications. This information must be submitted to the Engineer for pre-approval of the
alternate equipment being proposed and determination of compliance with these Contract
Documents. If the equipment differs materially or differs from the dimensions given on the
rawings, the Contractor(supplier) shall submit complete drawings showing elevations,
dimensions, or any necessary changes to the Contract Documents for the proposed
equipment and its installation. Pre-approval, if granted, will be provided in writing by the
Engineer to the Contractor (supplier) at least five business days in advance of the bid or
installation date. If the Engineer's approval is obtained for Alternate Equipment, the Contractor
supplier) must make any needed changes in the structures, system design, piping or
electrical systems necessary to accommodate the proposed equipment at the expense of the
Contractor (supplier).
2
y
2.0 COLLECTION SYSTEM AND GENERAL CONVEYANCE LINES
2.1 Location Of Collection System
There is no collection system, only a 4" gravity service line from the single park model unit.
The location is a direct piping to the initial septic tank.
2.2 Sewer Line General Specifications
The service lines shall be constructed of non-pressure pipe and fittings which shall be
Schedule 40 PVC. All non pressurized piping shall maintain a minimum slope of 1/8-inch fall
per lineal foot. Bedding and compaction shall be to a 95% Standard Proctor Test (ASTM
Standard D 698) and trenching and installation shall be consistent with ASTM D2321. These
specifications do not cover interior or initial building connections.
Force Mains and all pressurized lines shall be constructed of Schedule 40 PVC of a size as
noted on the engineering plans.
The following are general location and separation guidelines:
Typically a 3-foot minimum cover shall be maintained on all sewer lines. Gravity lines
that drain completely can be shallower if needed due to rock conditions.
Sewer lines may cross a water line if 18 inches clear separation is maintained, with the
sewer line passing under the water line. The sewer line shall be constructed of ductile
iron pipe and the water line shall be constructed of ferrous material equivalent to water
main standards for at least 10 feet on either side of each crossing.
i Sewer lines may cross a storm drain if at least 12 inches of clear separation is
maintained or the sewer pipe is of ductile iron or encased in ductile iron pipe for at
least 5 feet on either side of the crossing.
Sewer lines may cross a stream if at least three feet of stable cover can be maintained
with a horizontal boring or the sewer line is of ductile iron pipe or encased in ductile
iron pipe for at least 10 feet on either side of the crossing and protect against the
normal range of high and low water.
3
SrZlnC1
Individual gravity sewer main lines shall not be less than 4 inches in diameter. Building sewers
shall be in accordance with the state plumbing code and approved by the local building
inspector.
Pressurized sewer lines shall be sized according to lines sizes depicted in the engineering
construction drawings. All pressure sewer lines shall be sized to have velocities no less than 2
feet per and no more than 6 feet per second from the supplying pump at typical head
conditions to maintain scour velocity and minimize hammer.
Three (3) feet minimum cover shall be provided for all sewers unless ferrous material pipe is
specified. Ferrous material pipe, or other pipe with proper bedding to develop design
supporting strength, shall be provided where sewers are subject to traffic bearing loads.
Additional protection shall be provided for sewers that cannot be placed at a depth sufficient to
prevent damage.
Steep Slope Installation
All grades for gravity and pressure sewer lines are anticipated to be less than 20%. However,
should field conditions warrant, sewers on 20 percent slopes or greater shall be anchored
securely with concrete, or equal, with the anchors spaced as follows:
a. Not greater than 36 feet center to center on grades 21%to 35%;
b. Not greater than 24 feet center to center on grades 35%to 50 %; and
c. Not greater than 16 feet center to center on grades 50% and over.
Mechanically fastened joints (such as MegalugTM or Certa-Lok YelomineT"1) may be utilized in
lieu of slope anchors in certain circumstances. The project engineer should be consulting if a
substitution to the slope anchors is desired. The supply and return lines are on slopes that
exceed 50%.
There are no steep slopes on this project.
Trenchlncr
Trench excavation shall conform to the line, depth and dimensions shown on the plans or as
directed by the Engineer. The trench shall be properly braced and shored so that workmen
may work safely and efficiently. If unstable conditions are encountered, the Engineer shall be
notified in order that proper bedding materials may be selected. Trench excavation or
4
excavation for pipelines shall consist of excavation necessary for the construction of sewers,
conduits and other pipelines and all appurtenant facilities thereof, pipe embedment materials,
and pipe protection, insulating and sleeving in ductile iron pipe, as called for on the plans. It
shall include site preparation, backfilling and tamping of pipe trenches and around tanks and
the disposal of waste materials, all of which shall conform to the applicable provisions of these
specifications. When rock, excessive organics, muck, quicksand, soft clay, swampy or other
material unsuitable for foundations or subgrade are encountered which extend beyond the
limits of the excavation, such material shall be removed and replaced with pipe foundation
material as specified in the engineering drawings. Surface drainage shall not be allowed to
enter excavated areas.
Rock in Pipe Trenches
Rock encountered in trench excavation shall be removed for the overall width of trench which
shall be as shown on the plans. It shall be removed to a minimum depth of three (3) inches
below the bottom of the pipe and replaced with a suitable compacted (to standard)fill material.
If surcharges are to be levied due to excavation of rock, the Engineer must be notified to
inspect and verify the rock conditions prior to backfilling.
Pipe Installation
The pipe material listed above shall be installed in accordance with the manufacturer's
recommendations and the requirements of these specifications. All sewer lines shall be laid to
the line and grade shown on the plans. No deviations from line and grade shall be made,
unless they have been approved by the Engineer. The pipe interior shall be kept clean before
and after laying by means approved by the Engineer. Pipe ends shall be plugged at the end
of each work day or when work is temporarily stopped. The plugs shall be watertight so that
water and debris will not enter the pipe.
Backfillina
a)All backfilling shall be done in such manner as will not disturb or injure the pipe or structure
over or against which it is being placed. Any pipe or structure injured, damaged or moved from
its proper line or grade during backfilling operations shall be excavated, repaired and then re-
backfilled as specified herein. All backfill shall be compacted to a minimum of 95% Standard
Proctor. The contractor is responsible for procuring testing from a qualified geotechnical
testing firm and providing documentation of testing if requested.
5
b)The Contractor shall replace all surface materials and shall restore paving, curbing,
sidewalks, gutters, shrubbery, fences, sod, and other surfaces disturbed, to a condition equal
to that before the work began, furnishing all labor and materials incidental thereto as provided
elsewhere in contracting agreements. The backfilling of the trench after the pipe installation
and testing shall be in accordance with the standard trenching detail in the engineering
construction drawings.
Test n
All gravity (non-pressurized) sewer lines shall be tested by Low Pressure Air Exfiltration
Testing with the following steps.
1. All branch fittings and ends of lateral stubs shall be securely plugged at each
manhole. All stoppers shall be adequately braced when required.
2. Air shall be slowly supplied into the plugged pipe line until the internal air pressure
reaches 4.0 pounds per square inch or 4.0 pounds per square inch greater than
the average back pressure of any ground water that may submerge the pipe. At
least two minutes shall be allowed for temperature stabilization before proceeding
further.
3. Calculate the pressure drop as the number of minutes for the air pressure within
the pipeline to drop from a stabilized pressure of 3.5 to 2.5 psig.
4. The time allowed for mixed pipe sizes of varying lengths should be calculated as
described in ASTM C828-76T.
5. The following times are for one pipe size only:
Pipe Size (inches) Time, T Allowable Air Loss, Q
sec1100 ft Wimin
6 42 2.0
8 72 2.0
10 90 2.5
12 108 3.0
15 126 4.0
18 144 5.0
21 180 5.6
24 216 6.0
27 252 6.5
30 288 7.0
6. The pipe line shall be considered acceptable if the time interval for the 1.0 psi
pressure drop is not less than the holding time listed in the following table.
7. If the test fails, the Contractor will be required to locate the cause of the failure,
make necessary repairs, and repeat all testing of the line until the test is passed.
6
For pressure sewer lines the following Hydrostatic Testing Procedure shall be utilized.
1. As a minimum, all sewer force mains shall be tested in accordance with the
Hydrostatic Testing Requirements of AWWA C600.
2. After pipe has been laid and backfilled, all newly laid pipe or any valve section thereof
shall be subject to a hydrostatic pressure of not less than 150 psi or 1-112 times the
working pressure, whichever is greater. The duration of the pressure test shall be two
hours. Each valve section of the pipe shall be slowly filled with water. All air shall be
expelled from the pipe while the pipe is being filled and before the application of the
specified test pressure. Taps may be required at points of highest elevation. These
taps are to be tightly plugged after completion of the test.
3. The test pressure shall be applied by means of a pump connected to the pipe in a
manner satisfactory to the Project Engineer. The pump, pump connections, gauges,
and all necessary apparatus and labor shall be furnished by the Contractor. The
Contractor shall calibrate the gauges in the presence of the Design Engineer.
4. A test shall be made only after a part or all of the backfilling has been completed and
at least 36 hours after the last concrete thrust block has been cast with high-early
strength cement or at least seven (7) days after the last thrust block has been cast
using standard cement.
5. Any cracked or defective pipes, fittings, or valves discovered during hydrostatic
pressure tests shall be removed and replaced with sound material and the test
repeated until satisfactory to the Design Engineer.
6. Leakage shall be defined as the quantity of water that must be supplied into the newly
laid pipe, or any valved section thereof, to maintain pressure within 5 psi of the
specified test pressure. Leakage shall not be measured by a drop in pressure in a test
section over a period of time.
7. Allowable leakage shall not exceed the following U.S. gallons per hour reported in
Table 1:
Table 1. Allowable leakage per 1000 ft of pipellne (gph) Avg.Test
Pressure(psi) NOMINAL PIPE DIAMETER INCHES
3 4 6 8 10 12
250 0.36 0.47 0.71 0.95 1.19 1.42
225 0.34 0.45 0.68 0.90 1.13 1.35
200 0.32 0.43 0.64 0.85 1.06 1.28
175 0.30 0.40 0.59 0.80 0.99 1.19
150 0.28 0.37 0.55 0.74 0.92 1.10
126 Q.25 0.34 0.50 0.67 0.84 1.01
100 0.23 0.30 0.45 0.60 0.75 0.90
7
Y
If the pipeline under test contains sections of various diameters, the allowable leakage will be
the sum of the computed leakage for each size.
Alternatively, no pipe installation will be accepted if the leakage is greater than that
determined by the following formula:
In inch-pound units,
L -
SDJ
133,200
Where:
L allowable leakage, in gallons per hour
S length of pipe tested, in feet
D nominal diameter of the pipe, in inches
P average test pressure during the leakage test, in psi (gauge)
The Contractor shall notify the Project Engineer when the work is ready for testing, and all
testing shall be done in the presence of a representative of Brooks Engineering. All labor,
equipment, water, and materials, including meters and gauges, shall be furnished by the
Contractor at his own expense.
Valvin4
Valving shall be consistent with material types and sizes of piping as shown on the
Engineering Plans. Any air release valves must be mechanical lever air/vacuum relief valves
not flapper type).
8
3.o WASTEWATER TREA TMENT SYS TEM
The wastewater pre-treatment system consists of the appropriately sized septic tank and
Orenco AX20RT aerobic pretreatment system. Locations of the treatment equipment shall
meet the setback requirements set forth in NCAC 2H .0100, et. sec. The setback from
property lines can not be adhered to given the size of the parcel. The owner is seeking a
variance on that requirement.
3.1 Septic Tank
Septic tank sizing mipets the criteria outlined 15A NCAC 18A .1952 and shall be consistent
with sizing specified in the NCDHHS Innovative approval IWWS-2015-01-R1. Alternate tank
manufacturers may be utilized but sizing and construction specifications must be met. All
septic tanks shall be precast concrete and meet construction and testing specifications
outlined in15A NCAC 18A. 1953. All tanks shall be tested for leakage by either a 24 hour leak
test or vacuum testing by the tank manufacturer.
All inlets and outlets shall have 4" rubber pipe boots precast in to the tanks. Risers shall be
NCDENR approved plastic risers with riser rings precast into tanks. The initial and post-
anoxic septic tank shall be equipped with an NCDENR approved residential septic tank filter.
The filter handle must be accessible without the operators head entering the tank riser.
3.2 Aerobic Pretreatment System
The aerobic pretreatment system specified is an Orenco AX20-RTU system to be installed
and maintained in accordance with IWWS approval 2015-01-R1. All conditions outlined in the
approval shall be met. The following manufacturer specifications shall be met.
Excavation and Backfilfinp
1. Excavated materials acceptable as backfill shall be stockpiled in a location
approved by the Owner. The materials shall be located away from the edge of
any excavations. Excavated materials shall not be stored within the drip lines of
existing trees.
2. All open excavations shall be barricaded when construction in the area has stopped.
Night barricading should include posted warning lights.
3. Protect existing structures, utilities, sidewalks, pavement, and other facilities from
damage caused by settlement, lateral movement, undermining, washout, and other
9
hazards created by earthwork Operations. Protect root systems from damage or dry-
out to the greatest extent possible.
4. Soil materials shall be free of boulders, roots, sod, organic matter, and frozen material.
5. Bedding materials for pre-cast concrete structure installation shall be #57 washed
stone to the dimensions and depth shown on the construction drawings.
6. All excavation is unclassified and includes excavation to sub grade elevations
indicated on the construction drawings regardless of character of materials and
obstruction encountered. In the event that rock is encountered, the Contractor shall
remove it at no additional cost to the owner.
7. Stability of excavations shall be maintained by sloping of the sides and shall comply
with local codes, ordinances, and requirements of agencies having jurisdiction. Where
space restrictions prevent sloping of the sides, shoring and bracing of the walls shall
be employed in full compliance with OSHA requirements. In the case of pipe
installations, sheeting shall remain in place until backfilling progresses to a stage
where no damage to the pipe will result from removal.
8. The Contractor shall attempt to prevent surface and subsurface water from flowing into
excavations. The Contractor shall provide equipment, materials, and work necessary
to dewater any accumulation of water in the excavation to prevent softening of the
soils, undercutting of footings, and changes to the soils detrimental to the stability of
the improvements.
9. Excavations for structures shall conform to dimensions and elevations shown on the
construction drawings within a tolerance of plus or minus 0.10 feet and to the
standards of ASTM C891-90.
10. Backfiil shall be installed to excavated spaces in 8-inch lifts and tamped by hand or
pneumatically around pipe or structures. Tamping shall be performed evenly on both
sides of pipe and around sides of structures to a depth such that damage to the pipe or
structures is avoided as a result of subsequent methods of compaction. Extreme care
shall be exercised in backfilling operations to avoid displacement of pipe and
structures either horizontally or vertically. Backfill consolidation by ponding water is
not permitted. Compaction of each layer of backfill and the top 6 inches of sub-grade
shall achieve a 90 percent maximum dry density as measured by AASHTO method T-
99.
11. Remove all waste materials including unacceptable excavated material, trash, and
debris and legally dispose of it off Owner's property. Where settling is measurable or
observable at excavated areas during project warranty period, the Contractor shall
remove surface finish, add backfill material, compact, and replace surface treatment to
a quality and appearance matching adjacent areas of previous work.
Septic Tank and AX20 Tank Installation and Testing
1. Septic tanks shall conform to criteria in NCAC 18A .1953. The septic and recirculation
tank should be installed on a 6-inch minimum layer of No. 57 washed stone aggregate.
10
2. Place bell ends of pre-cast sections or the groove end of the concrete facing down. In
preparation for making joints, all surfaces of the portion of the section to be jointed and
the factory-made jointing materials shall be clean and dry. Each joint, seam, and pipe
penetration inside and outside of joints shall receive liberal applications of non-shrink
grout as well as liberal amounts of bitumastic waterproof sealant.
3. Lifting holes and other penetrations of the pre-cast structure wall shall be sealed with
non-shrinking grout. Pipe connections shall be made so that the pipe does not project
beyond the inside wall of the structure. Grout connections as necessary to make
smooth and uniform surfaces on the inside of the structure.
4. Before placing any tank into operation, remove any dropped grout, sand or other
imperfections and obstructions from the interior of the structure. Specifically, the
inside walls of the tank shall be smooth and uniform. Smooth-finish inverts so that
wastewater flow is confined and directed through the inlet and outlet pipes with easy
transition.
5. Tanks shall be backfilled in accordance with the applicable specifications herein before
described.
6. All pipe penetrations shall be through Press-Seal Cast-A-Seal 402 or approved equal.
7. All joints (mid-seam, top-seam) shall be sealed using Concrete Sealants butyl sealant
CS-102 meeting ASTM C-990.
8. All service access openings will be a minimum of 24 inches. Exceptions may be made
on a case by case basis with Orenco's engineer's prior written approval. All access
openings shall be fitted with Orenco Company riser assemblies.
9. A 24-hour static water test, in accordance with ASTM standards, shall be performed
on all precast tanks in order to insure they are water tight.
a. The testing shall be performed in the presence of the engineer or his
representative.
b. Each tank shall be filled with water and the initial water level shall be measured.
C. At the end of the 24-hour period the level of the water shall be measured again.
d. The engineer shall pass the tank if the water level did not drop more than 0.5
inches or if the total volume of the displaced water is less than 1 percent of the
total effective liquid capacity of the tank.
e. Tanks may also be leak-tested by applying a vacuum of 5-inches of Hg with
riser assemblies in place.
f. Each failed tank shall be tested again. In the event that the tank does not pass
the second test, the Contractor shall remove and replace the tank at no
additional cost to the owner.
Rhoinq Installation and Tesfin
1. Piping shall be PVC and of type and size as shown on the construction drawings.
Piping shall be installed with a minimum of three (3) feet of cover unless shown
otherwise on the construction drawings.
11
2. Piping shall be installed to be able to meet a pressure test whereby the pressure
remains constant for a minimum of two hours, and the allowable leakage is not more
than 10 gpolinch of pipe diameterlmile.
3. Any line installed under the driveway shall be sleeved in Class 52 Ductile Iron Pipe
and extend a minimum of 5 feet on either side and as shown on the construction
drawings.
4. AQWA shall provide the bypass valve and all specialty fittings. PVC piping and
connections are the responsibility of the contractor.
Orenco Dosing Pump and Control Panel
1. The Orenco dosing pump shall be an Orenco vertical turbine pump as provided by the
manufacturer.
2. The control panel shall be an Orenco simplex panel as provided by the manufacturer.
The panel shall have one on/off timer, high/low water alarm, and low water level/run
dry pump protection.
3. The control panel shall be in a NEMA 4X enclosure, installed in accordance with the
manufacturer's recommendations, and within 10 feet of the treatment unit.
4. No splices may be placed in the pump tank or riser. All splices shall be made above
ground in a NEMA 4x junction box.
5. Control and alarm circuits shall be on separate circuits.
6. The audible/visual alarms shall be external to any structure.
7. Dosing timers shall be preset by the manufacturer.
3.3 Post Aeration Apparatus
The post aeration apparatus shall be constructed of concrete with a Class C rip-rip energy
dissipater as shown on the Engineering Drawings. During excavation remove spongy and
otherwise unsuitable material and replace with approved material. Loosen exceptionally hard
spots and re-compact. Take every precaution to obtain a subgrade of uniform bearing power.
When necessary, compact subgrade with a high-energy mechanical tamper. Compaction shall
be a minimum of 95% of Standard Proctor to within 2' of final grade and 100%of Standard
Proctor in the upper 2' in accordance with ASTM D 698. Concrete shall be of Standard weight
concrete, ready-mixed concrete conforming to ASTM C 94. Maximum size aggregate of 1".
Maximum slump of 4". Minimum compressive strength at 28 days, 3,000 psi. Concrete shall
comply with requirements of Section 03300-Cast-In-Place Concrete for air entrained concrete.
Concrete shall be places on a 4" aggregate base. Forms shall be_wood or steel, straight, of
sufficient strength to resist springing during depositing and consolidating concrete, and of a
height equal to the full depth of the finished paving. Provide an industry standard sealant.
12
4.0 SITE PREPARATION
4.1 Clearing& Grubbing
The disposal areas must be cleared and grubbed. Clearing and grubbing allowed in in areas
as needed for equipment access and tank setting but is to be minimized.
4.2 Seeding& Mulching
Fertilizing, seeding, and mulching of disturbed areas not utilized for the drainfield installation
shall be completed within ten (10)working days following completion of system installation
and final inspection of the system by the project engineer or local health department. This may
require that a temporary seeding mixture be used during given dates of the year when
permanent seeding would not be allowed.
Jute. Excelsior or Mulchin
All seeded areas shall be mulched. Grain straw may be used as. mulch at any time of the year.
If permission to use material other than grain straw is requested by the Contractor and the use
of such material is approved by the Engineer, the seasonal limitations, the methods and rates
of application, the type of binding material, or other conditions governing the use of such
material will be established by the Engineer at the time of approval.
Applying Mulch:
1) Mulch shall be applied within 24 hours after completion of seeding unless otherwise
permitted by the Engineer. Care shall be exercised to prevent displacement of soil or
seed or other damage to the seeded area during the mulching operations.
2) Mulch shall be uniformly spread by hand or by approved mechanical spreaders r
blowers which will provide an acceptable application. An acceptable application will
be that which will allow some sunlight to penetrate and air to circulate but also
partially shade the ground, reduce erosion, and conserve soil moisture.
3) Straw mulch shall be applied at the rate of not less than 2 tons per acre.
Maintenance of Seed and Mulchin
Areas where seeding and mulching have been performed shall be maintained in a satisfactory
condition until final acceptance of the project.
13
Erosion Control
a) During the construction of the project, the Contractor shall be required to take the
necessary steps to minimize soil erosion and siltation of rivers, streams, lakes and
property. The Contractor shall comply with the applicable regulations of the
appropriate governmental agencies in regard to soil erosion control and
sedimentation prevention. Additional permitting may be required for erosion control.
It is the contractor's responsibility to make that determination and adhere to local and
state permitting requirements.
b) The Owner will limit the area over which clearing and grubbing and excavation
operations are performed.
c) Prior to the end of each work day on the project, the Contractor shall take the
necessary measures to protect the construction area from erosion.
d) Temporary and permanent erosion control measures shall be accomplished at the
earliest practicable time. Temporary erosion control measures shall be coordinated
with permanent measures to insure economical effective and continuous erosion
control during the life of the project.
e) Temporary erosion control measures shall include, but are not be limited to the use
of temporary berms, dams, dikes, drainage ditches, silt ditches, silt fences,
vegetation, mulches, mats, netting or any other methods or devices that are
necessary.
f) Erosion control measures installed by the Contractor shall be suitably maintained by
the Contractor until the site is fully stabilized.
g) Where excavation is adjacent to streams, lakes or other surface waters, the
Contractor shall not place excavated materials between the excavation and the
surface waters.
h) Where live streams are crossed by the project, the Contractor shall exercise
particular care to minimize siltation of the stream. Temporary erosion control
measures shall be constructed. These may include but not be limited to use of coffer
dam in the stream, dikes, diversion ditches and/or temporary sediment traps at the
top of the banks, and silt fences on all creek banks. All temporary erosion control
measures shall be acceptably maintained until permanent erosion control measures
are established.
i) Where runoff on natural ground may cause erosion of the trench or erosion of the
backfill in the trench, the Contractor shall construct temporary erosion control
14
measures. These may include but not be limited to diversion ditches, check dams
and silt basins or other.suitable erosion control measures.
1) Permanent seeding of disturbed areas shall be accomplished at the earliest
practicable time.
k) Gravel construction entrances shall be installed at all locations used regularly as
ingress and egress to the project site.
1) Stream and River Crossings
Diversion ditches shall be constructed at or near the top of each river bank at river
crossings. Localized stormwater runoff shall be diverted by way of the diversion
ditches away from the disturbed stream bank. Other specified erosion control
material shall be used in ditches and swales.
95
5.0 INSPECTION AND MONITORING PROCEEDINGS
5.1 Pre-Construction Meeting
A pre-construction meeting shall be scheduled which shall include the contractor, a DEQ
representative, the engineer or his representative, and the system(s) manufacturer
representative. Scheduling this meeting shall be the responsibility of the installation
contractor and all parties shall receive a minimum of one week's notice prior to the meeting
date scheduled. Any changes to the plans requested by the contractor or DEQ
representative will be discussed at this meeting and responded to within 3 business days by
the engineer.
5.2 Intermediate Inspection of the System during Construction
The contractor shall notify the engineer in time to inspect the site and insure proper installation
of the system components prior to backfilling.
Periodic inspections by project engineer during installation to assure compliance with agreed-
upon installation procedures for drainfield installation shall be required. A specific schedule
can be established at the preconstruction meeting.
5.3 Final Inspection & System Start-Up
A copy of the engineer's Inspection Form shall be provided at the pre-construction meeting.
This document shall be utilized during final system inspection and start-up.
Start-up Procedures
Start-up testing shall be required for all electrical and pressurized components of the onsite
wastewater system. Testing of all components to insure operation in accordance with
intended function shall be checked and recorded. Potable water shall be utilized for all system
testing.
16
Pumps and Controls
Potable water shall be introduced into the pump tank sufficient to activate (either by float
switches or time-dose) the pumping system for 2 on/off dosing cycles for the treatment pod.
All spray nozzles shall be checked to insure a consistent spray pattern over the media. A
minimum of 10 psi pressure shall be maintained in the pod distribution piping.
6.4 Regular Monitoring
Routine inspections of the system are required per the manufacturer's recommendations. The
inspections shall be contracted by the property owner and conducted by a private Certified
Operator other individual certified by Orenco. The monitoring schedule shall be consistent
with NCG55185.
Routine inspections shall include at a minimum:
1. checking the sludge levels in the septic tanks and pump tank.
2. cleaning the septic tank filters and grease trap filter.
3. checking the pumping system to insure both pumps are operational.
6.5 Residuals Management
Sludge generated in the treatment system as well as biomass buildup in the media pods
shall be monitored on a semi-annual basis. Should sludge build-up be identified, as
demonstrated by increased TSS in the effluent or by tanks checking with a sludge judge,
the tankage should be pumped by a licensed septage hauler for disposal at a local
POTVV permitted for off-site septage processing.
17
6.a CALCULATIONS
BOUYANCY CALCULATIONS
For Tank: AX20 RTU
Assume top of tank at G.L.
TANK
Lip (ft)
0.50'Ft. Thick Base
Tank Width 5,171ft
Tank Height 6 001ft
Tank Length 8.50ft
Volume of Tank 263.50 Cubic Feet
Pretreatment System Weight(dry) 908 ibs
Up Force from Displaced Water: 16,416.1 Lbs
Minimum Tank Water Volume 423 gal
Weight of Water Permanently in Tank 3,527.8 lbs
Length of Concrete Pad: 9 ft
Width of Concrete Pad 8 ft
Thickness of Concrete Pad 0.5 ft
Concrete Weight 5,206.3 Ibs
Volume of Soil above Lip to tank top: 153.00 Cubic Feet
Soil Density 80 lb/c.f.
Soil Weight 12240 lb
Down Force From Tank, water, Pad and Soil: 21,882.1 Lbs
Factor of Safety: 1.332968 Factwy of Safety OK
1
7.0 MANUFACTURER CUT SHEETS
7.1 Tanks
7.2 Orenco AX20 RTU Brochure
1
9 2008 Details Provided by APPIAN Consulting Engineers www.oppionengineers.com 06/30/2008 — 3:48:28 PM
GENERAL NOTES;
1. Design specif!cat lons conform to latest ASTM C1227 specifications"Precast Concrete OUTLET INLET
Water and Wastewater Structures" WATER ° ^I a
2. Concrete compressive strength 4,000 psi minimum, a
LEVEL a Q3. Steel reinforcing design to conform to the requirements of ASTM C890 specifications for a 0
Structural Design Loadin ngforWaterandWastewaterStructures"ad shall utlllze grade Q N FLOW
60 re-bars con Farming to the requirements of ASTM A615 or WWF conforming to the ;
requirements of ASTM A185 or both.Pi ace Additional reinforcing at all openings.
4. Optional Cast Iron casting with 24"dia•access In top section per NCDDT standards or ELEVATIONoptional20"round EZ set lid or as otherwise specified.Supplied by either Dellinger Precast
or customer.To be field adjusted using approved methods by contractor.
5, Pipe penetration locations as per jab rep ui rem ants.Pipe inlet and outlet locations to ROUND LI
have PSX Direct Chive boots or equal.Pipe Inlet locaions(typical 3 sides)to be knock
out pannels,Effluent Filter supplied by Dellinger. Inlet Tee&Pipe supplied by contractor. r 22"DIA
6. Joints to be sealed with ConSeal CS102.butyl rubber joint sealant or r,
equal.Sealant meets cr exceeds the requirements of latest federal
specification SS-S-0021(210-A),AASHTO M-19813, Z20-DIA
and ASTM C-990-91.
7. Lift Insert 1 Lift Eye Pin by M.A Industries or equal, 1 a ''
Cast-in by Dellinger Precast,Lifts meet or exceed
OSHA requirements,
8. Method of namufacture is Wet Cast, 52,E TOP&
9. Sections are monolithic.Weights: r..:: :: . .
d BOTTOM
Top Section 4,271 *Ibs, Q•} i. DIM'S
Base Section 4,426±Ibs. 06
Q I
I'
10. I.D.=Inside dimension
L•
4"KO INLET
O,D•=Outside dimension + r 100 ,r
rJ. '. TYP.3 SIDE)
L=Length r' .!
r.'
TEE-SEE
W=Width
rrr' FOW NOTES 3&6
H=Height i
NOTES 3&4
2"x 6 1/2"
VENT AT TOP
IMPRINT: 1.: 'F BAFFLEa' yew,::, ;..:.:r,.,
STB-79 r r
i: ;; .•;';; _, ;.:t....
OF TOP1000Gal.
SECTION4"OUTLET
EFFLUENT
FILTER
IOoMNOTES3&
530%LIQUID an I ,
MID SEAM
i' j L'
14
2j3 TAB $ Q•} IM'S
DEPTH FROM
TH
SIDES.
BOTTOM, BD
NOTE 10 QB
Q•p•
BA FL 3n
I f< 1+TwIC
o
ua 7 A.
R I
NOTE 6
I
m
Y 4„WIDE
0
z SLOT
V.
3"THICK
WALLS TYP, r . s ..r.. ai;: 1::.:1:
BASENOTE3
4"THICK BAFFLE SECTION
@ BASE&TOP
1 ,000 Gallon (Mid Seamy
Scale:
Not To Scale
Revision Date:
SEPTIC TANK February2008
Detail#
4531 North Flwy 16 Denver,N.C.28037 111 Phone:[phone] . 704-483.2868 111 Fax:[phone] IL ST-1,000-MS
TechnicalGrencorSheetData
AdvanTex"O AX20-RTUV Treatment System
Applications General
Orenco's AdvanTeO AX20-RTUV Treatment System Is a single,complete, Following septic tanks equipped with Biotube®effluent filters,the
self-contained module that treats residential-strength septic tank effluent AdvanTex AX20-Rft1V eliminates the need for separate recut,treatment,
to better than secondary standards with nitrogen reduction and ultraviolet discharge,and disinfection tanks and basins by performing all functions
disinfection before discharging It by means of pump or gravity.It is ideal within a single module.It also reduces the number of risers and lids
for: needed in the treatment train,For sites requiring antibuoyancy measures,
Orenco offers antiflotatbn kits with turnbuckles.
Repairs and retrofits NPDES applications The heart of the AX20-RM Is the AdvanTex Redreulating Treatment Tank,
Small sites and poor soils Strict discharge limits, a sturdy,watertight,corrosion-proof fiberglass tank that Includes the same
Including disinfection dependable,textile treatment media found in all AdvanTex products.
Sites that require shallow bury g
After treatment,effluent flows by gravity into the UV disinfection unit,
through the contact chamber,and around the W lamp where it is dis-
Infected in a 350-degree contact zone.The UV disinfection unit uses no
chemleals and has no moving parts,:It requires annual cleaning and lamp
replacement.In side-by-side NSFO testing,the Orenco AXUV reduced bac-
teria by 99,999%(5 logs),meeting or exceeding the performance of other
residential UV disinfection
Standard Models
AX20RTUV-M0DEIA
AX20RTUV-MODE1 B/10
AX20RTUV-MODE1 B130
Product Code Diagram
Ax20RT uv - El
61ark=merClrypWlaxxples
pnurnlpF
a nnrmaanyAoetsrl es
B g17AV
230 =23d V
BMnk=mdecnarpe pplu ma
10 =10Ppr4l Ac}pump 20=26gpmp.3VV c}}ptmp
30 :90Wm(19Ua9*pump 50=50 gPmP2llsed}ptrap
Q01 NunK 00raw
TfeOmAmoft
MOOE1A=made F,prddH®BCRarye MODEM mode 3,"V dlwhujga
MOOE1B=mode F,pomp NatY rpd MCMR mode 3,pump discharge
wd ecwnunrt
N approrar upum:
ee[Iht SiBnfMrd A,dJenTe ays[em
A%Bf.sedes Yaement enS
lUAtiWI YeahaerR area:
20=20 M IF.B fro
AdvwT%P ireahnenl8ynem
N.AdvanTW Treatment System AK-ffN Models meat the
ragt#rL'mwlts oI NSF/AW Standgrd 40 for Class I*terns.
UL-M09nked Orerrco®AW1DISO/Vellvn Unit
Orenco Syateme0 Inc.,614 Airway Ave.,Sutherlln,OR 97479 USA•800-348-9843 541-459.4449•www.oronca.com NTO-ATx-A%RT-3
Rev.2.0,®03117
Page 1 of 2
GrencaTechnical-Data.
Components
1. Inlet
2. ReolraVend chamber
3. Reclrc transfer Ilne
4. Reclrc pumping system5. 0 m
6
Maentrrflold
ient ednd pan nozzles
7. Tank baffle
8. Reclrc return valve
9. Reclrc/filtrato chamber p
16. llMder wall
11. Orenoo.MW ultraviolet disinfection unit
12, Dlslnfectlon/dlscharge chamber
13. Discharge pumping system Advan7exAX20-RTW side vlew(purnp discharge model shown)
14, outlet
15. External splice box 0
16. Passive air vent
17, Control panel(not shown) c
18. Blotube®Effluent Filter`on septic tank,not shown)
Specifications1ENominalDimensions' Irill'-1 I
Length,In.(mm) 102(2591)
Width,In,(mm) 62(1575)
Helght,in,(mm) 72(1829)AMn Tex AX20-RTW top view(pump discharge model shown)
Footprint,ft2(m 44(4,11)
Footprint,W(m(after installatlon) 20(1.86)
LId Insulation value R-6(RSI-1.1) Power cord
Dry Weight,I (kg)Cord grip
Gravity discharge model 908(412)
Vented lamp handle
Pump discharge model 948(430)
W Unit Performances 3-In.(80-mm)quick- Outlet
Typical contact chamber UV 270,000 µWslcm2 at 1 gpm(0A6 lJsec)
disconnect coupling
dose(65%transmittance 55,000 µWs/cm2 at 5 gpm(0.32 Vsec)
20%lamp degradation)28,000 µWs/cm2 at 10 gpm(0.63 Usec) Inlet
Minimum target dose 30,000-38,000 µWs/cmx.
Lamp 31 In.(787 mm),92 VAC,50 or 60 Hz,425 mA,
38 W;254 nm WC Intensity at 1 m Is 125 µWI Contact chamber
cm2
Power cord 600V,i 812 UL Type TC,25 ft(7.62 m)length Teflon'sleeve I
Cord plug UL listed four-pin connector,Iampholder,electric
d1scharge,1000 V or less . I
Ballast 120V,AC,50 or 60 Hz,located In UL-listed UV lamp
Oronco®control panel
Not fff IndNlduarsaia rn the state or Gemrgla. Flow-through spacer
t Nominal values provided SeeAdvanTex®Treatment System drawings far exact dimensions.
t For additional Info and specs,sae"QraacoO AXUV IslnkcUw Unit"(W-U 0.SI-2).
Orono AXW Disinfection Unit(cutaway view)
6l70-AT%-AXRT-3 Orenco 5ystemaP Inc.,814 Airway Ave.,Sutherlin,OR 97479 USA aoma-9843•641.459-4449•www.orence,com
Rev.2.0,Q 03117
Page 2 of 2
D
FAST TRACK SEWER ENGINEERING CERTIFICATION
PERMITTEE: TOWN OF FRANKLIN MY 2 9 p018
PERMIT#: WQ0038331
PROJECT: INDIGO APARTMENTS WlwMrQua1lyp
ISSUE DATE: March 8,201Ei Iona]ptp
This project shall not be considered complete nor allowed to operate in accordance with.Condition 7 of
thls'permit until the Division has received this Certification and ali required supporting documentation.
It should be submitted In a manner that documents the Division's receipt, Send the required
documentation to the Regional Supervisor,Water Quality Regional Operations Section at the address at
the bottom.
Any wastewater flow made tributary to the wastewater collection system extension prior to completion
of this Certification shall be considered a violation of the permit and shall subject the Permittee to
appropriate enforcement actions. The Permittee Is responsible for tracking all partial certifications up
until a final certification is received, A Final Certification shill be a complete set of record drawings and
design calculations regardless of whether partials have been submitted.
PERMITTEE'S CW. FICATION
I,the undersigned agent for the Permittee, hereby state that this project has been constructed pursuant
to the applicable standards & requirements, the Professlon l Engineer below has provided applicable I
design/construction Information to the Permittee,and the Permittee is pared to operate &maintain
the wastewater collection system permitted herein or portions thereo l
nAffAwl wnnd v RR-7-1 )n I
Printed dame,Title Signature Date
E NEER'S CERTIFICATICFN s
I,
w
as a dul registered Professional Engineer in the State of North Carolina,
having been authorized to observe ( perlodically, weekly, [ full Limey the construction of the
Indigo Apartments and location as referenced above for the above Permittee hereby state that,to the
best•of my abilities,due care and diligence was used in the observation of the construction such thatthe
construction was observed to be built within substantial compliance of this permit; 15A NCAC 02T;the
Division of Water Resources` (Division) Gravity Sewer Minimum Design Criteria adopted February 12,
1996 as applicable; the Division's Minimum Design Criteria for the Fast-Track Permitting of Pump
Stations and Force Mains adopted June 1,2000 as applicable;and other supporting materials,
North Carolina Professional Engineer's Seal w/signature&date:
W" ".................'.. .............
auttllNjuirH
Final Partial(include description) 4 7.
ti
Q
Certification Comments/Qualifiers(attach if necessary);
P P,rlll ,••.
NC DWR—Water Quallty Regional Operations Section 2090 US Hwy 70 Swannanoa,NC 28778
Asheville Regional office Phone: [phone] FAH:(828)-299-7043
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