WQ0002284_Staff Report_19910628

To: Permits and Engineering Unit
Water Quality Section
Date: June 28, 199.1
NON -DISCHARGE STAFF REPORT AND RECOMMENDATION
Dare County
Application No. WQ0002284
PART I - GENERAL INFORMATION
1. Facility and Address:
Rinnakeet Shores Partnership
Rinnakeet Shores Soundside
P. 0. Box 541
Avon, NC 27915.
2. Date of Investigation: June 13, 1991
3.. Report Prepared by: Kevin H. Milder
4. Person(s) Contacted and Telephone Number(s):
William T. (Tim) Joyner (Project Manager); 919-995-6215
Albert L. (Bill) Thomas, Jr. (ORC); 919-44177084
5. Directions to Site:
from NC Route 12 in Avon, go south approximately 1 mile past
stop light; on the right hand side is the new Avon Post
Office (under construction); turn right on a dirt road on
the north side of new Post Office; wastewater treatment
plant is at end of dirt road (approx. one-half mile)
6. Size (land available for expansion and upgrading):
total site is approximately 12 acres; approx. 11 acres are
available for expansion or upgrade
7. Topography (location map indicating relationship to 100 year
flood plain included):
site is in the sandy flat between NC 12 and the Pamlico
Sound marshes on Hatteras Island between Avon and Askins
Creek; site elevation is approx. 7 feet above MSL; only
known flood hazard is storm overwash from the Atlantic Ocean

2. Production rates (industrial discharges only) in pounds per day:
not applicable
3. Description of industrial process (industries only) and
applicable CFR Part and Subpart:
not applicable
4. Type of treatment (specify whether proposed or existing):
Existing: gravity collection system, pump station and force
main; 0.050 MGD extended aeration package plant; two 80-foot
diameter, hydraulically driven rotary distributors; and
standby power supply;
0.050 MGD extended aeration package plant consists of:
aerated surge tank with influent bar screen and duplex
effluent pumps; two parallel diffused air aeration basins
with secondary clarifiers, scum removal, and air -lifted
sludge return; two parallel, gravity -fed low -rate tertiary
sand filters with backwash pumps; tablet chlorinator; V-
notch weir, float gauge with chart recorder and totalizer;
effluent dosing tank with duplex final effluent dosing
pumps, automatic controls and alarms; aerated sludge holding
tank
Proposed: 0.220 MGD extended aeration treatment and
disposal system consisting of: flow splitter box with bar
screen; 55,000 gallon surge tank with 153 gpm duplex surge
pumps; dual 110,000 gallon (each) aeration basins; dual
24,684 gallon secondary clarifiers; 32,912 gallon aerated
sludge holding tank; 468 cfm triplex blowers; 174 ft
travelling bridge filter with 120 gpm backwash pumps; 3,820
gallon (each) chlorine contact chambers with gas
chlorinator; effluent flow recorder and totalizer; 5,000
gallon effluent dosing tank with 80 gpm duplex dosing pumps
and high water alarm; four 100-foot diameter hydraulically
driven rotary distributors; and standby power supply
5. Sludge handling and disposal scheme:
waste activated sludge from the aeration basins will be held
in aerated sludge holding tanks for stabilization; ultimate
disposal of stabilized sludge will be accomplished through
the use of a contract disposal firm for land application
(Atlantic Nutrients, WQ0000974; amendment request received
4/22/91 includes addition of sludge from Rinnakeet Shores)

Other than monitoring, the permittee seems to be in compliance
with the conditions of the permit. It should be noted that the
sludge disposal plan required by condition #14 was submitted
April, 1990 (see Part II, 5, above). Also, the hydrogeologic
report required by condition #52 was submitted May, 1990, and has
been reviewed by Alton Hodge, WaRO (see his memo to Carolyn
.McCaskill, 5/17/91, for his comments). Finally, there is no
apparent breakout of effluent from the disposal fields; although
-it should be noted that the average flow through the plant has
been well below design capacity (on the order of 2,500-3,500 gpd,
i.e., between 5% and 7% of plant capacity). There may be
unresolved groundwater issues associated with this facility (the
permittee has not been doing all required groundwater monitoring,
either); therefore, comments from the groundwater section will be
.particularly important in this renewal.
It is recommended that this permit be renewed for a period of
.five (5) years, contingent on approval by the groundwater
section.
- - - - 1 7)_
Si nature report preparer
Water Q ality Regional Supervisor
Date

RATING SCALE FOR CLASSIFICATION OF FACILITIES
'Name of Plant:
a
Owner or Contact Person: Wilt' . Ul'
Mailing Address: 9,4 &X Sd )
_ Ayovt NCI
County: Vom Telephone: (910 9V-
NPDES Permit No. NCOt} -- Nondisc. Per. No. 11YQQ=?m
IsSi;aDate: 2/iAo Expiration Date: 12 f _ oc
Existing Facility x New Facility Sste, kt1ie,_d�9
Rated By: btu 1 �tJ�kr Date:�� � 9l
Reviewed (Train. & Cert.) Reg. Office �,..
Reviewed (Train. & Cert.) Central Office
ORC A)jg1} L "I1 APL Grade 2
w4u io kWe trim - o o -rz MG 0 ; {C-cage. ►aow -%a ley a4 50,70 owfmm
POINTS ITEM
POINTS
Industrial Pretreatment Units and/or
(4) PRIMARY TREATMENT UNITS
industrial Pretreatment Program
(a) Septic Tank (see definition no. 43) ..............
2
(see -definition No. 33)
4
(b) Imhoff Tank ..................................
.5
QF SI QN FLOW OF PLANT IN GPD
(c) Primary Clarifiers ............................
5
(not applicable to non -contaminated cooling
(d) Settling Ponds or Settling Tanks for Inorganic
waters, sludge handling facilities for water
Non -toxic Materials (sludge handling facilities
purification plants, totally closed cycle
for water purification plants, sand, gravel,
systems (def. No: 11). and facilities
stone, and other mining operations except
consisting only of Item (4) (d) or Items (4) (d)
recreational activities such as gem or gold
and (11) (d))
mining) ...:...:..............................
0 — 20,000 ...........................
1
(5) SECONDARY TREATMENT UNITS
20,001 50.000..........................
(2)
(a) Carbonaceous Stage
50,001 — 100,000 ...........................
3
(i)Aeration - High Purity Oxygen System .... .
100,001 — 250,000 ..........................
4
Diffused Air System ...........
10
250,001 500,000..........................
5
Mechanical Air System (fixed,
500,001--1,000,000 ..........................
8
floating or rotor) ..............
£
1,000,001 -- 2,000.000 ........................
10
Separate Sludge Reaeration .... .
2,000,001 (and up) - rate 1 point additional for each
(ii) Trickling Filter
200,000 gpd capacity up to a
High Rate ...................
7
maximum of 30
Standard Rate ...............
5
Packed Tower ...........
5
(i l i) Biological Aerated Filler or Aerated
Design Flow (gpd) 5D'000
Biological Filter .......................
10
(iv) Aerated Lagoons ...................... .
10
(v) Rotating Biological Contaclors ..........
10
(vi) Sand Filters -
PRELIMINARY UNITS (see definition no. 32)
O
intermittent biological ... . .
2
(a) Bar Screens ................................
recirculating biological . . . ..
3
or
(viz Stabilization Lagoons ...................
(b) Mechanical Screens, Static Screens or
(vni)Clarifier ...............................
6
Comminuting Devices ........... .............
2
(ix) Single stage system for combined
(c) Grit Removal ...............................
1
carbonaceous removal of BOD and
or
nitrogenous removal by nitrification
(d) Mechanical or Aerated Grit Removal ...........
2
(see def. No. 12) (Points for this item
(e) Flow Measuring Device .......................
1
have to be in addition to items (5) (a)
or
(f) Instrumented Flow Measurement
a
C) through (5) (a) (viii)
..............
(x) Nutrient additions to enhance BOD
(g)Preaeration................................
2
removal..............................:
5
(h) Innuenl Flow Equalization
0
(xi) Biological Culture ('Super Bugs') addition :r
...................
io'enhance organic compound removal .....
5
Grease or Oil Separators - Gravil
2
Mechanical..........
3
Dissolved Air Flotation.
8
(; Prechlorination ... . ..........................
5

DFFIHITIOHq
1 (1),leetvai.V Cubon,Bids. A phy{kabth.r.ieal method for rodudng telublo organic mal.thl from
wial.waht .Illuem: the column -typo boils used In th;z n.thod will have a flow rat. varying irom two
to419M 90ons pat minute per squus fool and may to akher upiow of donrntow carbon buds. Carbon
may or may not be ragensral►el on rho wislawalor treatrnont plant she.
(21Aarated Lagoont. A basin In which at aoW, are—Wa;nsd In suspsnslon and by which bidog;csl
ox;dal;m of efgan;c maiser 4 tedueed Iluough erfificianr accelerated tran.fer of oxygen on a 111-
Yrough bash;
(J)Aaral'an. A process Of bringing Aboul insets comic: bit—ni air or high purify oxygen in a liquid
by -praying, agk-:;on ddtmion: .
(4)A9rkvnwaly managed site. Any sit* on which a uop Is produced, managed, and harvestod'(Crop
Includes ga ... s, grain., trees, etc): .
(Sy.4 Stripping. A process by which the ammoalum ion Is first comortsd to dissolved ammonf; (PH
adjvermem) wish the ammlonta than released to lh• 2urAlphora by physical mains; Or other similar
Processes which remove polrofaum products such as besasna, toluene, and xylonk
(6)Cubon Regeneration. The rogenorallon of exhaulled carbon by the use of a furnace to provide
estrem-y high lemp4ap/res which volatilize and oxidize th. absorbed Inlpunllo7:
(7)Cubcn3c.ws Stage. A stage of wasl.walor tre.Ira.N designed to achfove 'secondary' oMuonl
firma.
(tlCOnVit"o. A midan(caf device In which eonudugsl force U used to separate solids from I'puids
amdrof to separate liquids of different d.miG.s:
R)Chamical Addition Systems . The addition of chemical (s) to wastewater al an application poW for
pwposes of improving solids removal, pH adjustment. ahcalinit), control, o14: the capabmly to
oxperimsnl with different ch"'icaft and dJlstom appicxion pouts to achieve a specific resuh win Ise
considarad ono syssem; the capat"ly to add chemical (a) to dual wits w9 be rated as ono system;
capabkffy to. add a chemical at dillor.ncs application pouts fur drlrer.nc purposes Will result In Ill.
.ysl.ms b.ing roc .a ■.pxml. syslom.
(10)U.nJc11 Skrdge Conditioning. Th. addition of x chem cal compound such as lime, Isuic chlorld., or
a polymer to w-1 [lady- to coalesce the mass prior to Its appicadon to a dowatsAlq device••
(H)Ucsod Cyst. Syaloms. Use of holding ponds of holding lanks lot conainmenl of wastewater
containing Inwghn;c, non-Iox;c materials from a". pt-vv{ crushed atom w other similar operadom.
frwa which thus ;s no discharge to the surface waters: such systems ship cury, a mazknum ol two
a apudless of pumping acififtss or any other appvrt.eances:
)Comb(rod Rsmovxf of Carbonaceous BOD and H)Uogancus Removal by HWiicalion - A single saga
e;stem 'de, signed 14 achriov• 'advanced- pumit elEuen remits on BOfr and ammonia rrlrogan within
the same biological reactor.
(13)0a-chler4nition. The pupal or complete reduction a rosidual chlorins In a Squid by any chomkaf
Or physical process:
(14)0ordtr;6cation Process. The corv.rs)on of nual";7og-n to nvtrogan gas:
(t7)51—adialys6- Pfocass lot removing ionized sates 4om water lht"ll the use of ton-seleclHe
Iea•.achang. m atv.n.s•
(16)Fil.r Press. A process operated machankxlly for puJally, dawaterIng skrdg•:
(17)Fo2m Sopaafins. The plannod frothing of waziowaler or wastewater .Uluan, as a moans of
t.O.ovinq eu-zihva amounts of dotergom muerisls trough the introduction of aI In she form of line
bubbles: also cacod foam 1#acdon&6On-
(18)Gtd R.moval The process of nomeving 01 and other heavy wkwah matter from wastewater,
(19)IrtJwR Txnk. A deep two story waslawal.r Wilt co Ilik g of xn upper ssrfim.ntallon chamber and
I fewer sledge dgal6on chamber,
(20)Intlturnmi4d Flow M-xzw-mem. A device which ln&xiot andtot records rate of pow;
(21)lon Exchange. A chemical process In which ions from two different moiscules ore exchanged;
(22)Land appbcstion: (a) Sludge DisposxL A final zIWgs disposal ma Wed by which sfudgs may be
applied to find &;that by spexyLN an the surface or by subsurface kt]ocl;cn (La., ehlsal plow): (not
appdcxbl. for :rp49 of sludge doacf;bad In (11) of this Rule): (b)Tresl4d Elflu.nl The process of
-praying trailed wast.walst onto a land area of other ch.thods of appricuion of waslowalor onto a
land 1144 as a mean) of knit disposal uidubr Irsalmcm:
(27)I.Gcroscr4-r. A low speed, contfrwously back•wa-.l.d, rotating drum filler oporaling unda(
V"ily eond-hone as a polishing method tamoving suspendtd solids from afWenl:
(24)W"ilicalian Pt".st. TM biochemical convsntion of unoxidlaed nitrogen (ammonia and organic
shklogsn) to oitdltd rJuoq-n (usually rJuals):
(2SK=O9enou1 Sage. A teparala sage of watlawzlef treatment designed fur the specific pwpot. of
serwAfting lavnon;l nitrogen to nitrate tallrogen•
(26)Phc sphila Raraovil Biological. The 'amoral of phosphorus Rom waslowatar by an oxkranoxic
process do-;Vmd b tithance krswy uptake of phosphorus by the. m ar olquJsms:
("W"shlry Pwtd. A homing pond following secondary tr.xtaanl with zWicfant detention to allow tor
the sell&" of fray suzpondad solids: I
(26)Post A-atior. A-raiGn following conventional secondary treatment wr(is to (nCneass atlluant D.O.
or Iw any ocher purpss.;
(29)1'ort Aw tie. (Ciscade) A polishing method by which Gztohed oxygen is added lo the effluent by
a nonmachin;caL grivlly means of flowing down a sarf.s of stops of wells• The flow Occurring across
pine slept w well nnovez in a fairy thin Layer and the operation of the eatead. requires no operator
adjuslmOnt Owl. tare points at& assigned even though Ihit Is an essential stop to msa dry ate Emits ol
(3011'evrelmd or G12au4r Acilvated Carbon Food. A Uophyzical cub -on process that utilizes biological
aciivhy and organic absorption by using powdered or granule activated carbon; Virgin and/or
-nq.norat•d carbon Is lead conroned Into dhe rytiom;
(J I)Pt-aer-ion. A lank cemtructed to provide aeration prlot :o primary triltmenp
(32)1`nfiminary U4-.L Unit opaations In the fr-xtm-nt poc-u, such as Meaning and comtnlnuilon,
zhal prepua Ja C" fur subtagverd major operations•
(]]Nndua rhl Prausiu-ni: (a)Pto-Ireatmenl Unit, InduttriaL The condidorJng of a vrasts at Is
source bola. dstcbujo, to l-mov• or to nautraflzt subslinces Injurious to sewers and Ireazmsnt
PfOc'sa.s or b eE-cl a pullal reduction in load on a tr•atmom process which Is op4a1-d by the same
go"eninq body as the wast•waler tf•aun•ni plan) be Ing rated• (b)Pte4(.xtm4n: PfogrxM tndusulal
must be a State of.EPA A requited program to focs;vs poWs on Cho •tatinq shear
P4)Prim"y Cfiiifl,is. The first 14116ng tanks through which waslowaur Is passed In a treatment'
Works fir It" pur?os- of tomov;ng sett.aba and suspended j 6ds Ind BOD which is usoclaled with the
/otids:
PS)Pumilaa Air 1415r4nt. -111ua N, and Is -platy pumps;
(J()Rxdt'ao&' Disinfection and/or slsfTizalion process ve;izfng devices amiukty Ldaviogl or gamma
rays;
(]7PRIvefse Osmosis. A treatment places$ 1n which a heavy contaminated rsgttut ;s paseu had
Quough x nswmbrme loaning nsatfy bur- liquid flee from impondad solids: .-
MIROtAd" Bleklikll Conactws. A fixed biological growth prm..z In which w siswalor flows
Wovgh larks in wl4h a as(;*' of parJ&lfy sulam-rgad ckcvar swfaces ore fe,laled• _
(39)Sand Fil.a:(-)rwl.rmin-nl Biological Filtration of otfiuen: following ssptk links, lagoons* or
awn• *the' tr.atrOaN proc-ss In which funhot Wod.composhion to expaclod to produce desired
stWanis: Hrdautc IeadIng 'also on those Ryas are compul.d In gpd/ac and have a rsswbkp low
gprWsl (last Iban an.): (b)Reunculatlng biological • the aim- type •I &ate (alter as dallned in (a) wish
the erutM capability to t.cycls oWuent back a wough tto a" iyor,
(40)Sand or Wx.d-Media FIN.rs. A po9ahL g psoc..a by which •IItu.N limits tea achieved through a
further feduction at su.p•nd.d 5e6da4z)1ow tale --gtivkr. hydiav5caiy loaded Wor with loading
face' in Ills site is Woo gpmrsl tangs-(b)high tale .. a p--ss hydavicaly loaded Aker with loading
Wet in Ms farm QP"I angs: At any ale, the loadrtp ate will excood Mrsa gpnv&t
(41)S.cond3ry Clarifiers. A oak which (olbws the biobpkal upd of a Vesltaenl plant and we has
the poi 14 of renwviag sludge asseciatad wqa h tha biological Ir�trnons utJu•
(42JS:puate Sledge R.aeralion. A pan ol the conpcl slabr7ila"n proc.as whet. rho activated andp
Is Iranal.rrod to a tank and -.rated boter• r.lurring k to the bAaIn; o
(40IS.pak Tank. A tkngoo•uory ■suing lank In whkh settled sludge Is In contacl with the wasl.wal.r
flowing Weugh the lank; shall not be apprcabl• for septic tank sy.tsms serving s;ngt. La..h;ly
te.idenc.t having x capacky Of 2000 ixllcns or lest which dlachupo to a tilirxadon field;
(44)Sludgs Ngoit;m The process by whkh Organic of volatile manor and s"m Is grits-d, fiqu-A d.
mintraflzed or converted into more slab4 wgank matte tareugh the activity W living nrgha;ums.
which kxlud.s -stated hol09 ntank.:
(4S)S"o Drying Dads- An area comprising ruMal or ar"d.1 layors of pious materials upon Mhitll
dfg.stad swag. &hdg. is didin eby dnaga and ■vaporatfoln A
(46)Sludga EluWalion. A process of sedge corditiof" In'ill" •aruin cauliluonla us removed by
zuccssslre washings with flash water or pram allluoN• -
(47)Sludge Gxs ULNzatim Th. process ol uslp sewage yii for the purpose of healing bunldyng,
driving orngims, •Ice•
(4i)Sludge Holding lank (Aerated sad Honaaratod).. A Link uh'dtod lot small wastewsloa troalrMnl
pLims not eonlaWno a diposlea in wn;eh trudge, may Ill, kopl kask and tupornataN w;Vrlranyn piw .o
a drying toothed (La. skdpe drying trodsg Thfs may be done by adding a imam amount of av stn.pty, 10
loop the sludge flesh, but not nocessarily as amount that vrotdd bo rogvired to achieve ttabii-36an of
otgarJc miter, A honaeraud teak would simply be mod to docaat Outgo prior to dawaisring and would
simply be used to docam sedge prior to dowater(rg and would not allay long periods (aevOral days of
d.loNion) without tosufninp odor problems;
(49)Skdgs kncinwatws. A furnace das;gnad to born rfudgo and to tO o at mo4two and comiusddo
maleriala and reduce the sludge to a ssotits zsh:
(50)Shrdq. Stabilization (Chhamkal or Thermal). A process to make treated sludge loss odorous and
puUvscrlbh. and to reduce Ill. pathogenic orgintsm content; This may be done by pH adjustment
chlorine dosing, or by heal floiln4rnt
(SI)Sludge Thickener. A type of s-dunealalion ant in which the Akrdge is pormiuod to seEls and
tkJck•n through agitation and pawky;
(S2)Stabikation lagoon. A type of orida0•n tapom In which bkAnkai mutation of orgartic maws is
affected by natural vansl-r of oxygen lo the water from aid (not a polishing pond):
(S])Sand•By Power Supply. On sit- or portable .licit" gomalirg oquipmant:
(54) Slack Screens. . A slatioctuy screan designed to tomoYa solids bxivdinq taon-IJodogtadabis
pulkulm. (Iioatalale solids. suspended sours and BOD raductim) from municipal and industrial
wastewater treatment systems:
(55)Tertiary T(matmont. A sage of tr-llmam following socondary which is primarily for the purposo
Of alltuanl pordhinq: A Settling )apoen Of sud or coal fill" might be employed for this purpose.
(56)Thetmal Pollution Contra Dark.. A device providing for the transfer of hall Rom a fluid Sowing
in lub4s to atwther duld outside tho tubas, or vka versx; or, other moans of aguluiry
liquid (amparafuras;
(57)Th.im2l Sludge Conditional. A cmndiicni g prococs by Mich heal Is added for a protracted period
of tIms to Inhprova the dewalttabUy of sludge by Iha soWtZzl g and " ulia"vhg of the smarlor and
mot. hlghy hydrated sludge pu"s:
(56)Toxk Wtoris4. Those wxstss or conbinao"s Of vriftes Inducting d(seue-causing agams whkh
%list &charge and Upon exposure, ktgosl(on, inhalation or xisimItation We any organism -;Mar
directly from iho onvkonment w indirectly by ingestion through food chains, will cause death, disease,
behav;uxl abnormalities, unc.t. 9.nadc motadons, phys(obglcal elaWncWns (tncivding malfunctlonI
In aproduclion) or physical deformations. In such organisms w their offspring: Toxic materials
include, by way ilimiration uhd not flm;ation: lead, czdmnmt, chremhum, mercury, vinadlum.
ars-rJc, lint. ortho-rwuo-chlot.bieMono (OHCS poychlortrtat.d biphonyls (PCBs) and dkblotodiph•nyl
VkHofosthans (DDT): and any other auurix4 Bel have or may hatexh.r be determined to have toxic
properties:
(S9)Tilckll" Wet. A biological trestm.nl UrJI consisting of material such as broken siora c4 lock
ores which wastewater is dutrsbufed; A high fa:a trickRog Ater Is On, which is op•rala'a-al b.vt.cn
10 znd JD mgd pot acle. A low rate u'ekinq lifter is one which is d,skAod lu
mqd per au.; "tale al one ,K low
(60)Tl;cUnq Filter (Packed Torr i) A p(up Bow type of operation In which wastewater Bows down
through safix Iayerz of merbh or Mal' malwfat: Crp%nic malarialm
is [.oved continua:y by
active biological feed growth in each successive layer. This method my produce 'cscordarj cuaGly
aEiwrd; or may be adaptad to produce x rtfp(iad ol0wnr
(sl)Yacwm F;na, Contrifvg-s, Or F7:.r Praises. Devices which ore designed to t.mov excess
waief from either digested or undigssltd sludge prior to disposal or firths treatment.

} , /q I ' co
ROS
State of North Carolina
Department of Environment, Health and Natural Resources
Division of Environmental Management
512 North Salisbury Street • Raleigh, North Carolina 27611
James G. Martin, Governor George T. Everett,Ph.D.
William W. Cobey, Jr., Secretary Director
May 22,.1991
MR WILLIAM T. JOYNER
KINNAKEET SHORES
PO BOX 541
AVON, NORTH CAROLINA 27915
Subject: Application No. WQ0002284
Avon
Sewers -Private
Dare County
Dear MR JOYNER:
The Division's Permits and Engineering Unit acknowledges receipt of your permit application and
supporting materials on May 14, 1991. This application has been assigned the number shown above.
Please refer to this number when making inquiries on this project.
Your project has been assigned to Lindsay Mize for a detailed engineering review. A technical
acknowledgement will be forthcoming. If this acknowledgement is not received within thirty (30)
days, please contact the engineer listed above.
Be aware that the Division's regional office, copied below, must provide recommendations from the
Regional Supervisor or a Procedure Four Evaluation for this project, prior to final action by the
Division.
If you have any questions, please contact Lindsay Mize at [phone].
cc: Washington Regional Office
Bissell Associates, Inc.
Sincerely,
G 1
Donal Safrit, P.E.
I\ Supervisor, Permits and Engineering Unit
I
i
Pollation Prevention Pays
P.O. Box 27687, Raleigh, North Carolina 27611-7687 Telephone [phone]
An Equal Opportunity Affirmative Action Employer