WQ0016165_Final Permit_19990514

State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
James B. Hunt, Jr., Governor
Wayne McDevitt, Secretary
Kerr T. Stevens, Director
May 14, 1999
Mr. Roger Spach, Superintendent
Department of Water Resources
City of Lexington
28 West Center Street
Lexington, North Carolina 27292
Dear Mr. Spach:
NCDENR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
Subject: Permit No. WQ0016165
City of Lexington
Conjunctive -Use Wastewater Spray Irrigation
Davidson County
In accordance with your application received October 29, 1998 and the additional materials received February
12, 1999, we are forwarding herewith Permit No. WQ0016165, dated May 14, 1999, to the City of Lexington for the
construction and operation of the subject conjunctive -use spray irrigation system.
This permit shall be effective from the date of issuance until April 30, 2004, and shall be subject to the
conditions and limitations as specified therein. Please pay particular attention to the monitoring requirements in this
permit. Failure to establish an adequate system for collecting and maintaining the required operational information will
result in future compliance problems.
If any parts, requirements, or limitations contained in this permit are unacceptable, you have the right to request
an adjudicatory hearing upon written request within thirty (30) days following receipt of this permit. This request must be
in the form of a written petition, conforming to Chapter 150B of the North Carolina General Statutes, and filed with the
Office of Administrative Hearings, P.O. Drawer 27447, Raleigh, NC 27611-7447. Unless such demands are made this
permit shall be final and binding.
One set of approved plans is being forwarded to you. If you need additi nal information concerning this matter,
please contact Ms. Joni Cardin at [phone] extension 509.
Sinc y,
T
Kerr T. Stevens
cc: havidson County Health Department
Jeff Edmonds, P.E. — City of Lexington Public Works
Winston-Salem Regional Office, Water Quality Section
Winston-Salem Regional Office, Groundwater Section
Bob Cheek, Groundwater Section, Central Office
Technical Assistance and Certification Unit
Non -Discharge Compliance/Enforcement Unit
PO Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone] Fax [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled/10% post -consumer paper

NORTH CAROLINA
ENVIRONMENTAL MANAGEMENT COMMISSION
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
RALEIGH
SPRAY IRRIGATION SYSTEM PERMIT
In accordance with the provisions of Article 21 of Chapter 143, General Statutes of North Carolina as amended, and
other applicable Laws, Rules, and Regulations
PERMISSION IS HEREBY GRANTED TO THE
City of Lexington
Davidson County
FOR THE
construction and operation of a 9,000-GPD conjunctive -use spray irrigation disposal system consisting of 176,000-
square-foot spray irrigation area, forty sprinkler heads with a maximum 57-foot cast, and all associated piping, valves,
and appurtenances to serve the City of Lexington, with no discharge of wastes to the surface waters, pursuant to the
application received October 29, 1998 and the additional materials received February 12, 1999, and in conformity with
the project plan, specifications, and other supporting data subsequently filed and approved by the Department of
Environment and Natural Resources and considered a part of this permit.
This permit shall be effective from the date of issuance until April 30, 2004, and shall be subject to the following
specified conditions and limitations:
I. PERFORMANCE STANDARDS
1. Upon completion of construction and prior to operation of this permitted facility, a certification must be
received from a professional engineer certifying that the permitted facility has been installed in accordance
with this permit, the approved plans and specifications, and other supporting materials. If this project is to
be completed in phases and partially certified, you shall retain the res onsibili to track further
construction approved under the same permit, and shall provide a final certificate of completion once the
entire project has been completed. Mail the Certification to the Non -Discharge Permitting Unit, P.O. Box
29535, Raleigh, NC 27626-0535.
The Winston-Salem Regional Office, telephone number [phone], shall be notified at least forty-
eight (48) hours in advance of operation of the installed facilities so that an in -place inspection can be
made. Such notification to the regional supervisor shall be made during the normal office hours from 8:00
a.m. until 5:00 p.m. on Monday through Friday, excluding State Holidays.

3. The spray irrigation facilities shall be effectively maintained and operated at all times so that there is no
discharge to the surface waters, nor any contamination of ground waters which will render them
unsatisfactory for normal use. In the event that the facilities fail to perform satisfactorily, including the
creation of nuisance conditions or failure of the irrigation area to adequately assimilate the wastewater, the
Permittee shall take immediate corrective actions including those actions that may be required by the
Division of Water Quality (Division), such as the construction of additional or replacement wastewater
treatment and disposal facilities.
4. The issuance of this permit shall not relieve the Permittee of the responsibility for damages to surface or
groundwaters resulting from the operation of this facility.
The residuals generated from these treatment facilities must be disposed in accordance with General
Statute 143-2I5.1 and in a manner approved by the Division.
Diversion or bypassing of the untreated wastewater from the treatment facilities is prohibited.
The following buffers shall be maintained:
a) 400 feet between wetted area and any residence or places of public assembly under separate
ownership,
b) 150 feet between wetted area and property lines,
c) 100 feet between wetted area and wells,
d) 100 feet between wetted area and drainageways or surface water bodies,
e) 50 feet between wetted area and public right of ways,
f) 100 feet between wastewater treatment units and wells, and
g) 50 feet between wastewater treatment units and property lines.
11. OPERATION AND MAINTENANCE REQUMEMENTS
The facilities shall be properly maintained and operated at all times.
2. Upon classification of the facility by the Water Pollution Control System Operators Certification
Commission (WPCSOCC), the Permittee shall employ a certified wastewater treatment plant operator to
be in responsible charge (ORC) of the wastewater treatment facilities. The operator must hold a certificate
of the type and grade at least equivalent to or greater than the classification assigned to the wastewater
treatment facilities by the WPCSOCC. The Permittee must also employ a certified back-up operator of the
appropriate type and grade to comply with the conditions of 15A NCAC SA .0202. The ORC of the
facility must visit each Class I facility at least weekly and each Class 11, III, and IV facility at least daily,
excluding weekends and holidays, and must properly manage and document daily operation and
maintenance of the facility and must comply with all other conditions of 15A NCAC 8A .0202.
A suitable year round vegetative cover shall be maintained on the spray irrigation field.
Irrigation shall not be performed during inclement weather or when the ground is in a condition that will
cause runoff.
Adequate measures shall be taken to prevent wastewater runoff from the spray field.
The facilities shall be effectively maintained and operated as a non -discharge system to prevent the
discharge of any wastewater resulting from the operation of this facility.
The application rate shall not exceed a cumulative loading of 30.0 inches over any twelve (12) month
period at an instantaneous application rate not to exceed 030 inches per hour.
2

No type of wastewater other than that from City of Lexington's wastewater treatment plant (NC0055786)
shall be sprayed onto the irrigation area.
9. No traffic or equipment shall be allowed on the disposal area except while installation occurs or while
normal maintenance is being performed.
10. Public access to the land application sites shall be controlled during active site use. Such controls may
include the posting of signs showing the activities being conducted at each site.
III. MONITORING AND REPORTING REQUIREMENTS
Any monitoring (including groundwater, surface water, soil or plant tissue analyses) deemed necessary by
the Division to insure surface and ground water protection will be established and an acceptable sampling
reporting schedule shall be followed.
2. Adequate records shall be maintained by the Permittee tracking the amount of wastewater disposed. These
records shall include, but are not necessarily limited to, the following information:
a. date of irrigation,
b. volume of wastewater irrigated,
c. field irrigated,
d. length of time field is irrigated,
e. continuous weekly, monthly, and year-to-date hydraulic (inches/acre) loadings for each field,
f. weather conditions, and
g. maintenance of cover crops.
Three (3) copies of all operation and disposal records (as specified in Condition 111 2) on Form NDAR-1
shall be submitted on or before the last day of the following month. All information shall be submitted to
the following address:
NC Division of Water Quality
Water Quality Section
Non -Discharge Compliance/Enforcement Unit
Post Office Box 29535
Raleigh, North Carolina 27626-0535
4. A representative annual soils analysis (Standard Soil Fertility Analysis) shall be conducted on each spray
field and the results maintained on file by the Permittee for a minimum of five years. The Standard Soil
Fertility Analysis shall include, but is not necessarily limited to, the following parameters:
Acidity Manganese Potassium
Calcium Percent Humic Matter Sodium
Copper pH Zinc
Magnesium Phosphorus
Cation Exchange Capacity Base Saturation (by calculation)

5. Noncompliance Notification:
The Permittee shall report by telephone to the Winston-Salem Regional Office, telephone number (336)
771-4600, as soon as possible, but in no case more than 24 hours or on the next working day following the
occurrence or first knowledge of the occurrence of any of the following:
Any occurrence at the wastewater treatment facility which results in the treatment of significant
amounts of wastes which are abnormal in quantity or characteristic, such as the dumping of the
contents of a sludge digester; the known passage of a slug of hazardous substance through the facility;
or any other unusual circumstances.
Any process unit failure, due to known or unknown reasons, that render the facility incapable of
adequate wastewater treatment such as mechanical or electrical failures of pumps, aerators,
compressors, etc.
c. Any failure of a pumping station, sewer line, or treatment facility resulting in a by-pass directly to
receiving waters without treatment of all or any portion of the influent to such station or facility.
d. Any time that self -monitoring information indicates that the facility has gone out of compliance with
its permit limitations.
Persons reporting such occurrences by telephone shall also file a written report in letter form within five
(5) days following first knowledge of the occurrence. This report must outline the actions taken or
proposed to be taken to ensure that the problem does not recur.
IV. GROUNDWATER REQUIREMENTS
Any additional groundwater quality monitoring, as deemed necessary by the Division, shall be provided
2. The COMPLIANCE BOUNDARY for the disposal system is specified by regulations in 15A NCAC 2L,
Groundwater Classifications and Standards. The Compliance Boundary is for the disposal system
constructed after December 31, 1983 is established at either (1) 250 feet from the waste disposal area, or
(2) 50 feet within the property boundary, whichever is closest to the waste disposal area. An exceedance
of Groundwater Quality Standards at or beyond the Compliance Boundary is subject to immediate
remediation action in addition to the penalty provisions applicable under General Statute 143-
215.6A(a)(1).
In accordance with 15A NCAC 2L, a REVIEW BOUNDARY is established around the disposal systems
midway between the Compliance Boundary and the perimeter of the waste disposal area. Any exceedance
of standards at the Review Boundary shall require remediation action on the part of the permittee.
V. INSPECTIONS
Adequate inspection, maintenance, and cleaning shall be provided by the Permittee to insure proper
operation of the subject facilities.
4

The Permittee or his designee shall inspect the wastewater treatment and disposal facilities to prevent
malfunctions and deterioration, operator errors and discharges which may cause or lead to the release of
wastes to the environment, a threat to human health, or a nuisance. The Permittee shall keep an inspection
log or summary including at least the date and time of inspection, observations made, and any
maintenance, repairs, or corrective actions taken by the Permittee. This log of inspections shall be
maintained by the Permittee for a period of three years from the date of the inspection and shall be made
available upon request to the Division or other permitting authority.
3. Any duly authorized officer, employee, or representative of the Division may, upon presentation of
credentials, enter and inspect any property, premises or place on or related to the disposal site or facility at
any reasonable time for the purpose of determining compliance with this permit; may inspect or copy any
records that must be maintained under the terms and conditions of this permit, and may obtain samples of
groundwater, surface water, or leachate.
VI. GENERAL CONDITIONS
This permit shall become voidable unless the facilities are constructed in accordance with the conditions of
this permit, the approved plans and specifications, and other supporting data.
2. This permit is effective only with respect to the nature and volume of wastes described in the application
and other supporting data.
3. This permit is not transferable. In the event there is a desire for the facilities to change ownership, or there
is a name change of the Permittee, a formal permit request must be submitted to the Division accompanied
.by an application fee, documentation from the parties involved, and other supporting materials as may be
appropriate. The approval of this request will be considered on its merits and may or may not be
approved.
4. Failure to abide by the conditions and limitations contained in this permit may subject the Permittee to an
enforcement action by the Division in accordance with North Carolina General Statute 143-215.6A to 143-
215.6C.
5. The issuance of this permit does not preclude the Permittee from complying with any and all statutes,
rules, regulations, or ordinances which may be imposed by other government agencies (local, state, and
federal) which have jurisdiction.
A set of approved plans and specifications for the subject project must be retained by the Permittee for the
life of the project.
7. The annual administering and compliance fee must be paid by the Permittee within thirty (30) days after
being billed by the Division. Failure to pay the fee accordingly may cause the Division to initiate action to,
revoke this permit as specified by 15A NCAC 2H .0205 (c) (4).
8. The Permittee, at least six (6) months prior to the expiration of this permit, shall request its extension.
Upon receipt of the request, the Commission will review the adequacy of the facilities described therein,
and if warranted, will extend the permit for such period of time and under such conditions and limitations
as it may deem appropriate.

Permit issued this thejourteenth day of May, 1999
NORTH OLINA ENV O M TAL MANAGEMENT COMMISSION
w �
Kerr T. Stevens, Director
Division of Water Quality
By Authority of the Environmental Management Commission
Permit Number WQ0016165

Permit No. WQ0016165
May 14, 1999
ENGINEER'S CERTIFICATION
Partial Final
I, , as a duly registered Professional Engineer in the State of North
Carolina, having been authorized to observe (periodically, weekly, full tithe) the construction of the project,
Project Name
Location and County
for the Permittee hereby state that, to the best of my abilities, due care and diligence was used in the observation of the
construction such that the construction was observed to be built within substantial compliance and intent of this permit,
the approved plans and specifications, and other supporting materials.
Signature
Date
Registration No.

0
u
0
N
SCALE IN FEET
0 2,000 4,000
1
a
FIGURE 1
CITY OF LEXINGTON
PILOT SPRAY IRRIGATION PROJECT
oa DAVIDSON COUNTY
p WQW0016165/9W98187
� C SITE LOCATION MAP

Affci G�rvtPirJ�/

��"fathYYtCN � ;t',i',-•:�qir tG a - ! # , 1r. ,.� iy �'�`'• } _ ,.» ��:_.
�',+rS�,a�.'• {��'.;1'.' yr3�"'�"�•r� '..rR •'� ,�� Rr 1 � �3�J�7� �E•��::,r'h• . �Jjt' II y �-�:•. • • .�. � 'w�:
is y, ,4 , - �, �'r• sr 1 �' � r+���Y ,��I ,- �; ���1 ! l;� ri, r�. �y Y �'rCf7.. #�, ��R �� �j 1:� r�.
�`- -'�rr�a+F,l�`��',`1��.`f'f; {'.� �i *Ir' T'[Jj 6•.. ! �+rr. �'t'���tal i-"!',3T�� L My�h1��/ra:�ll l5 id��i+i��fttl �4 rT -�'h� y� r. ,��i:�. '!i��t 1 1r«,,�A:��r y
. '•�:- ter^.".' rz j,',{'#'1 {'!, ; �.r�.r[ 11,•}, ,Y , ' .11 .i ,+;4�T,'�y }`.�, _.`, i'r t '1 i .-I ! -',. � (�+`}.�;.
.1 . . y j � } `i'�+ �? • � f: f,r Ii,Ts„1! l' 1 f y y.0.'` ur, t [ J• T a , . 4,; . 'I . r, f
C"' � t�ii k i 1 + •d / 7;� i { s r. 1 Y` ►►yy R.":; �. • �,j l7.ir�+"
r •�':S.i�Ys'r r,��;-_ `�11 [ Ild ��{l';rl�' tl^,r'V'._SF J �r r... .y,'iMtl'�•' "w �l f ,�,��r {r, .�4 },
r�. r 4} -`s. 3, si !°' r.� , jf r'1..,•��rv1 .hl r•u�!' !7'�'Y.�.,4 +y�� '!a,'' (—���,••�rNt, �' � 1�. 1
Jr i .n..' � � i- 1 Ji ,yi� �• k :r� jjjj�����.«[: i d -rC, 4 Y.. •}": [' 'S� j+ � `�`rr r �:S �Ce
y, � '� . •r� i ai � 7 f i" P r' .ii,}h'Y � �'�t,: i�i��}� ..• if 1 4 �� �" N , 'i
,�,y:•s:`i ° y; w ,+ Vs'('
Aerial Photo of the ;y, b, ' ►#, � :( ,Y 'f' If, ' iri • '>_ '� .': tl, t Y v k .
I N J s 4i 1 '}`; M
IT,e=! i f+'Fl ij1.. `S F _ i 'y +.I.y. -5� .i -. • !• ,4-''�... . 1' -rN Y '•.b �,i7
Site and Surrounding rwNt�ke�,•5j 1Ti�4" .( .}�x
K ,,L. ..trs� y r }•}:ll yi!+il�` �ryVi:.r P� rrrT'i'i 1r •Z' n�rr�. d�.. i:iF'rw'Nt+'•,'y,f L',.I-�. I,. 1'•(i"�
Area Taken in 1995
h hlCi �11 t tf h.,a{F)yW �1 '�F k r 1 � 'i� S, !-�i•f i � 1. 1 i�` �f 1'fi' ,
�,�+ r ,r, ) '"i , N ,,[� s {id '`� �4 ,i i f�'• /��t� 5 j ! � ,. L
V � `i'ii�[;-r,.���r��a'.'+� } :�.Y� / I °+ itb,�la�S}i.y i'�y{ �ru.�,lrri �����n; 4[�` y' N•dk ('p,i• °�'1E7{rS�i� '• [f.fl+.. t �'!`t���,�i-,ut•;:4 '� �
ti: ;��+•,. ,.sy. �,� r I �' [ 1A i`ryr { a S. 1' s..-r ."r. 1 ,�. 1 '}4 Before the Site Wa3Oh•c �,1 �r .ki,�{.s�.�1y.s�:s.F�uti • �.' d<:n':�C, Ti 17 'Zr ,.,.r.,
Logged. � tt, y+ F�;s ;yY, 1G}� �- }{., �'. , I .r>' is 1'dlr.r �yi, .RY, ,s r .ftY;r'' 'fir
}i' �� rwtl. r.i.r� to 4a. Y IMr E ,�• ' w. yi'r.{' . L:mw• _S N{, t, 1 ?y}' i'i .,� �Y h lil! f�".' '.l 5,., Lr;''a
'•i.,. `T 'r. ''tt-�'} ,y1�11 ''ly'r �` '•' ' `, O '• 9' i' r 'i rS yiEr 4'I li ','#•`' i 'j;•;ii',�y '! rH sr`+S sl- " i y
hw,rq+Q d r o , J
[:. k-, i a, . f�g� Sf•s�' �,tf.r�
' s • f , '{ 1 '� "r i 4 !Ar rn, _% e , ` 'dr,li lr 4'+Trsj►IS 1 ''t r1 m.t
+s ♦r'r! "Er °j nr rr11#dy ` sv �i {F
1 inch — 1500 f t s E 1 Y, 1fy 1 aye }�v )('
YIN.I f`1
per iu.i1 `xr�55..17j Y '•+%r rx ;, r4 I. a, !, ,[ it t.rllirh J,.i!: .,:.•lr.y Y#�'� '!" 'sr.'r"1F•' '^w"'d �``h,A
'i��?? a i j S y 11 =lY h �rS'"' S r�r }} �,,fF .. t '� I'l'��, st`v'1;.,a:w.�id'°i.,,d }t££ { f r.+>~ 1 S . i r � � ny, F N•;.t1: e • �r.� T�
yr�1:)�}�5 .1. aly, I,,.) I:{, 'ss ,,� ' •.
1NVO, { { o , 1 � `i y C ; f
.i +r�''r.',+
h r" a, .}.'. a § � „ �• —4
e'r ��' e'�r"" t� � , k �.. el �+.}` � � w . 1.. .+s6ty�L:iu'.tC"'- rs r„fr , l4 � E Y 'Yi.-f.,•, �^�Pj' � � � G�k�3"yf ai°��'-'�,,i[
�,.ay +: •. ,j f i 1 4 r•r4 ,, I i Jk+G+''"
.b y1tt1''Ir, s , Py ' w: ,. a e l f (,r,� ek-
�•r{ ti�Y ijr F•. ti': Abbott 8 e q`��:F,._1.'.,.
�alyp; - ¢ r` r� y ra i'Y i,:•F
} ,p�. C�,Y •+ yr ' f , i. y- 1p r'' _� ;r, �h: k r! k��S >5 ,Irl![•t'y. (. � r._,,_ ,1f,+,y d4 s,. >�,rT4
{ -1 -: pt' i �s,�����'7,�' P' i'G -�' Y ,W � +�' � - T ��':S x •AS" ' � S 1;4i {�i�:"'!S�''r�-� 1 .'�►i�� �i n , •d� �1� 4r 4` f •�� f� S"Gt' J � J
I " ` t', a', f: .i , r� � }:v 1 S�l y r: r ,,� @.. � 4+. `t " � �'�?�z�F h 6 •li��r�[tigx , �' y
'-? ly 1,���''{V } �' rt�.�, r`r�j .:w +��"'�� �'� s1'�I rs��rr,' ���I�' riil'}`.�I`h's.�ra �,r}{G '� •r ..rl � r �:��1r�t �I "�'
`:ty 5 e � ' 1 : �� d ° �T 4 's Si��SW�;:.��# 7'' !1!'r +::iPd''tiiY l��r T** 6�+( r4.. �� t,(�.!-°w�.•._ 3„t""' �1 i 'I; 1 '3 ;I�h
q � r �' k p 4:, }x�M ,-.., Vr.c r,1if ,4 P - ! •�°�'-S,SI >•" � s � r.
P: r•R,:1,-}, G .• shjyl��`, ri,V.ys'� pri;
t� ^¢. :�>' ty yy jj l •i'sY''Ir, ,Y
,`i ,r,i4Yb.,�4'i_I ,.Ii:611Y,•it
„rf l,�fr'
? t [I � J N [ - ; �,'*j •�� , ; ' �,' f r � ,y� "'o'� �,V'� a•r „4 . d i •d+.�i.
`_ -rp 1 r t �'+ �'.a,l '�5 't j 4'I 1, • .tt� a � 1, -1 7 i jifir{Y c 4 !�'r..sili ':.tC! l: +� s E � 'i, '
P"ry s4�l 1� ;a S �1 '`� ' �r1Ni!}�1 t S!{ {{ rfr slr,yr ily ' �y G'{ Yf r• , •i,• $IsM�
ti Vi 3Y 31° C r`+.• a.';'i. Y t y a Y
b � 3Y, � r1 �! i, , Y r • I' + 'u � 1 ,�• ,, f• �' pr1'h. 1'' s�{ ,� 1��•
"{; �4N, F+V� ,• '2 7i :r.r
J lS'f � y�, '♦' + '+ .ri! l{' � s -�"{1�:�"a''�.;� �t}= �:� C� �V� '�.' ��> �+Y'.d5,:1- 't. r F 1 '71 'I''
.{+ � _: '- � � �^ *W , r � f> .'�R {�ial x" "SS,x >� , � .r' �.. W+C ,h "'t,� t-'t b{ss s I1.•' A I r � }r {,,,
17rkr`as;�.f�, r '!'•;��'t I
8 Al
�, _ � s e ,�'�y�4,. fhx}Jler�, i�l I�k. 1 „�,(�, �� t - II./`r S�� rf li' fl it 1'� si � �I � I 3 ['•�'tl , ��fl, ��4��.--_rl,,,
s'( �C�st ►•',''q�, ':rr'�"�`�'� tj+�, y1i J +e.l i r.�yM;��iy I,t'^ •�iS. I'��+ =F'k��,Y' ��<•tjw.y;kl,4y „��:,7��y,Ty}iE� 11��
v7, .k ,�'f•'r', L?�_',�;1���'*j;�;: I,a;Y. �{' i 1' ;}z _Is>.!�{� .�.`il'�'{�'k.zrr' '11E + fY f?rv�'Yid.4r �'!1��- ''ir�Vl�'y?����:�I1.,
ri +� � �+•�,F'S Yrl lj� x, � ,R"{�9i �M ���.�r � p+! -1'j -+ �•? r• ( P �• 1 AY� ra yk fr..
N-
6 � d 'I .51 � '• q i' , •�' � � ���1 i # s e:v;.Y{r„ a ' i 1,! ��ss i.
S• y�,y �a. ��?{�'� r � er +r �,{17 �=. 1 I� � } • y�i,l,'Th :[ ��$'t�l�' ,•t�ah�r����l�}� E�4 ��d y {1�yr 1''ir, �.A�' �' j�f, �a '`�'t1ti ySae`�s�,w
f5q�y; �^F�- �Y„" FJ ..A '•ItV `Il<i� #'QX '���`l 4�ij�, r:'yii '+f1 �1 "�.+Yir� � ''-"t; •a �,r�Sa�Y y'tph:)�1�', � �{-5•. �i, 'tF e.
- i' 1. f },yN r •I V f }! ie�. ''i�,• ��a 1.' �€j' �•��r''r '� '21
J.-: ', r . yr yX ,yar � �aji li.; li •�. � I � 1 ��t ". r,ti� 1 T'i'i t ��'1 ��'f 1 r� "r`R s•,d irs!§e-• �'�•
sJ Na y l _ y -fit „fit t',ra rH. ' 1 M '•'f}I't 1 a ^: 4 ,�. Vt A r.,p.•i .,a5r 1t+' il[d -
_,''a .k.,r� v,, Ir°t�;n��• fy'l 1 •'G f + 4:"' pis ���,,.`
f5-tr f , • I, $ �,C !�1 t•,, }4 1 , i }, r r r ':y{ 5,
; , i; kY ij tYlrl ! yq hr . f. , d I + < 2 i� a r �i!;' 4 ,t: ''" `� , r'F•, V :,# Q 'eS ti; ,iai kd� y T!
1SI 1'i }s �5y'': r01 �1 }�
wtlW/rCr[..firF.'Sf "'!''x ,r�i r•-v., �,�:�•: '{.y,r'�`- P`C,"' .y ,r 4j 'M+ y ` '��AF��'. }' '?j•
:.�s: �t:�,j`5i',�rryy: r%�'�r '# - �Ihrt t...�. �4,��:i s�}'�:, '1�`��r. ����#'kr. .r.�`i' �rtill iy•I P;{_'L�A1`�-4[,k_J ' I,.r�'�y,,�11; }yliE., ,,� Yie•�`ly 't��uau
j' y} (( W
Tl, y4l.tr -'w,i vn, + 4 l k i.
I, ! S'L s v,�1 4 { ,�. 1 SY e •j ,i I,tit s}i-{.y- r 1F _' S}#1 Y, w ] r "'
+, .r r .•r, ,a,,Y+ la aRlVd� {.51� Ya 1 S,I tiq �i,.�1�'yy •6 Ff.
% --� } �s��• 1!'S �} 1,..� tn.'x
• '��' � '-� ',,���� .kl�,. •i 'b'�i fis N. �'ril�t'f ;" iiyy7�I�s'r:�l, {., rl , }•,p,�+5 r ,
t' •" �#+' r ry .I raary w ;{.+ [ dy[{FI p -�., _J. 1L%'. n {� 4. �y4 i -�*rS ,{ rig' t
:� fN 1 -� ( ���• It Ili•TJ9 �,'.. `il -1 5 E r '0 '' 1 .y} 9 ,� 11 1 '..
,y0 Ir y. a{'•i,, i �ry` �'y t �1�� rt �I� I�A` ,W f lye aft r ' . >5; 'SJ.� ei: �Itk{.! .�'1. �1� - �ti 'rd� !.s :'
��• "tfh f dY'' r ;71 r f � w'5�17 f.lt�0.R I' 1 ��e�,}, •al,.:l•';yk;jy�1'� i� -�,. S. y,(•< � [ ,� " , i � `^ , ' ' 4 c�i y ��.'.
>� r�1 ;,S'! 4f'•(•� f f ,,11lu.'{t'� �'�f^)S R(^'r
�1'i' _ 1 p .�. _. 9' i}��Ir�•' �'fY.^ �irr' 1� 'sn�lfrA�'�r .: `f, 1 `, r. '�i �1�j,
_. 1ir'i If�k �+ ,*'f. r � ` .4 !',1'r� '7- 'A r+yY+.' ' ' 4'�3 - 1':V. i +� +Iy, r, {M�'p "r"r ,',i:lii � ' I - 1'� r } 1 � y1 . �irl�i...-,+' .g�� s § s ri' s ��•15
1�;1: c �FY _ I �' � •Z r. , f',A'' 1r 4 ,I fyl l� .}:�.�ryi li�� t,4'.f 5 � rl','E�, � (r, f., n, a��' i �" Y �`'„� S
' � , s iT[•�`� (,1�. � r • ` t � �4 er't'., 4Y 1'1 `r� �+" S>{ I , , 1' a� ! � :� � F .� s' � � # � , f j $• `'f E �r�' � ' �,'e , �;." 5dS-�l.,J�� : �i y' 1�
���LL','+ g cyyc L i" a I"[' f , 1, #r S1�rf+ ,i s����`rt.� '� 7 } • ' y 1pG' .,.� _T,,y�
.r'-I,(f .r`�'1'i'..':f. �a.L. .d -- r.,��.� .....� =•i• 1 �� fr til►...a2.�Y�:w-LY2eU'YirA5F1,J.:.1��`C._Y:�,�a A_'_. }.'*_—._...__•:, _, -

RATING SCALE FOR CLASSIFICATION OF WATER POLLUTION CONTROL SYSTEMS
Name of Facility:
r of Lax i.
. Le; S-,°R4y �-,' Ret&.4T7oy t-kofEc:
Owner or Contact Pers n: R'oU e.,e S'eacN , S��Ea,�r7cre err - IJ�g; , 2F &EScu'eczz
Mailing Address: .78 t')6sr 0'"TF-R
County: Telephone: 336 - a'v3- 7H8
Present Classification: New Facility -- Existing Facility
NPDES Per. No. NC00,;,� :�8 (.p Nondisc. Per. No.WQ oe + to +4 5 Health Dept.Per No.
Rated by: _.1rNnr�L R �'• tRy£ Telephone: 3 - 77/- & oo Date:
Reviewed by: Health Dept. Telephone:
Regional Office Telephone:
Central Office Telephone:
ORC: M r cyeg L. ,1RL1_Fg Grade: Telephone:
Check Classification(s): Subsurface `' Spray Irrigation Land Application
Wastewater Classification: (Circle One) 1 11 111 IV Total Points:
► � :.►1 ' a� :► 1 1 � �\Il:i� w�� nlu JAI �!* �� S :.\ \Ily . .:1 � ► � � li : Ji�i� 1�► '.'�. a �3�..
1.00- is \ 1 la : lu q►: a�i i� i ��• �i :..► ia.i. �l t " 1• �l'a L RAJ 'JI \. �\' aJE• J:
SUBSURFACE CL S,&FiCATICN
(check all units that apply)
1. septic tanks
2. pump tanks
3. siphon or pump -dosing systems
4. sand filters
5. grease trapinterceptor
6. oillwater separators
7. gravity subsurface treatment and disposal:
8. pressure subsurface treatment and disposal
SPRAY IRRIGATION CLASSIFiCAT0N
(check all units that apply)
1.
preliminary treatment (delinition no. 32 )
2.
lagoons
3.
septic tanks
4,
-pumps
pump tanks
5.
6.
sand filters
7.
grease lraprnterceptor
8.
oil/water separators
9.
disintection
id.
chemical addition for nutrient/algae control
11.
spray irrigation of wastewater
In addition to the above classifications, pretreatment of wastewater In excess of these components shnIt
be rated using the point rating system and will require an operator with an appropriate dual certification.
LAND APPLICATIONIRESIDUALS CLASSIFICATION (Applies only to permit holder)
1. Land application of biosolids, residuals or contaminated soiis on a designated site.
WASTEWATER TREATMEt T FACiLriYCLASSIFICAT)ON
The following systems shall be assigned a Class I classification, unless the flow is of a significant quantity or the technology is unusually
complex, to require consideration by the Commission on a case -ay -case basis: (Check if Appropriate)
1, Oil/water Separator Systems consisting only of physical separation, pumps and disposal;
2. Septic Tank/Sand Filter Systems consisting only of septic tanks, dosing apparatus, pumps,sand filters, disinfection
and direct discharge;
3. Lagoon Systems consisting only of preliminary treatment, lagoons, pumps, disinfection, necessary chemical treatment for
algae or nutrient control, and direct discharge;
4. Closed -loop Recycle Systems;
5. Groundwater Remedialion Systems consisting only of oiVwater separators, pumps, air stripping, carbon adsorption, disinfection
and dispo rJ;
6. Aquaculture operations with discharge to surface waters;
7. Water Plant sludge handling and back -wash water treatment;
8. Seafood processing consisting of screening and disposal.
g. Single-family discharging systems, with the exception of Aerobic Treatment Units, will be classified if permitted after July 1.
1993 or H upon inspection by the Division, it is found that the system is not being adequately operated or maintained. Such
systems will be notified of the classification or reclassification by the Commission, in writing.

The following scale is used for rating wastewater treatment facilities: (circle appropriate points)
rrEM POINTS
( 1 Industrial Pretreatment Units or Industrial Prelreatmeni Program (see definition No. 33)...................................................4
(2) DESIGN
FLOW OF PLANT 1N gpd (not applicable to nort-contaminated cooling waters, sludge handling facilities for
water purification plants, totally closed cycle systems(ses definition No. 11), and facilities consisting only of hem
(4)(d) or
Items (4)(d) and (i 1)(d)]
0 - 20,000..................................................................................................................I.............................1
20,001 - 50,000.......................................................................................................................................
50.001 - 100,000.....................................................................................................................................3
100,001 - 250,000..................................................................................................................................A
250,001 - 500,000...................................................................................................................................5
500,001 - 1,000,000....................................................................................:...........................................a
1,000.001 - 2.000.000......................................................................................................................... 1 0
2=0,001 (and up) rate f point additional for each 200.000 gpd capacity up to a maximum at .................30
Design Flow (gpd)
(3) PRELIMINARY
UNI-T&PROCESSES (see definition No.32)
(a)
Bar Screens...............................................................................................................................................t
(b)
or
Mechanical Screens, Static Screens or Comminuting Devices..........................................................................2
(c)
Grit Removal..............................................................................................................................................1
(d)
or
Mechanical or Aerated Grit Removal.............................................................................................................2
(a)
Flow Measurk g Device................................................................................................................................1
(l)
or
Instrumented Flow Measurement .............. .......................................... ........................::..............................2
(g)
Preaeratlon...............................................................................................................................................2
(h)
Influent Flow Equalization .................. ....................... .......................................................... ...................... .,2
(i)
Grease or Oil Separators - Gravity.................................................................................................................2
Mechanical.................................................................................................................................................3
Dissolved Air Flotation................................................................................................................................8
(J 1
Prechlorination.........................................................................................................................................5
(4) PRIMARY TREATMENT UNITS(PROCESSES
(a)
Septic Tank (see definition No. 43)............................................................................................................2
(b)
lmholl Tank...............................................................................................................................................5
(0)
Primary Clarglers.........................................................................................................................................5
(d)
Settling Ponds or Settling Tanks for Inorganic Non -toxic Materials (sludge handling faciWas for water
purification plans, sand, gravel, stone, and other mining operations except recreational activities such as gem
orgold mining)........................................................................................................................................2
(5) SECONDARY TREATMENT UNITS(PRDCESSES
(a)
Carbonaceous Stage
(i) Aeration -High Purity Oxygen System...............................................................................20
DiffusedAir System.......................................................................................................1 0
Mechanical Air System (fixed, floating or rotor)..................................................................
Separate Sludge Roasrailon............................................................................................3
(11) 706ding Filter
HighRate.......................................................................................................................7
StandardRate................................................................................................................5
PackedTower ................... ................................. .............................................................
(if[) Biological Aerated Filter or Aerated Biological Filter ............................................................10
(lv) Aerated Lagoons .........................................................................................................10
(v) Rotating Biological Contactors......................................................................................10
(v€) Sand Filters -intermittent biological..................................................................................2
Recirculatingbiological.....................................................................................................3
(vll) Stabilization Lagoons..............................................................................I......................5
(Vill) Clarifier...........................................................................................................................5
(Ix) Single stage system for combined ewbonaceous removal of BOD and nitrogenous removal by
nitrification (see definition No. 12)(Points for this item have to be in addition to Items
(5)(a)(€) through (5)(a)(vill),
utllbgng the extended aeration process (see definition No.3a)...........................................2
Utilizing other than the extended aeration process..........................................I.... .............8
(x) Nutrient additions to enhance BCD removal......................................................................5
(A) B€olog€cal Culture ('Super Bugs`)addition........................................................................5
(b)
Nitrogenous Stage
(1} Aeration - High Purity Oxygen System ....... ........... ................. _................ ....................... 20
Diffused Air System.......................................................................................................1 0
Mechanical Air System (fixed, floating or rotor)..................................................................8
Separate Sludge Reaeraiion............................................................................................3
(11) Trickling Fliter-High Rate..........................:............................._................................ ......... .7
Standard Rate....................................................................................................I..........5
PackedTower.................................................................................................................5
(lit) Biological Aerated Filter or Aerated Blofoglcal Fllier.............................................................1 0
(IV) Rotating Biological Contactors......................................................................................1 0
(v) Sand Fitter - intermittent bloiogicat..................................................................................2
Recirculating biological....................................................................................................3
(VI) Cfadrter. ...........................................................................................................................5
(6) TERT€ARYORADVANCED TREATMBFUNIT&+PROCESSES
(a)
Activated Carbon Beds -
wittwut carbon regeneration....................... .. ........ ............................................. ......................
with carbonregeneration....................................................................................................... 5
(b)
Powdered or Granular Activated Carbon Feed -
withoutcarbon regeneration..................................................................................................5
withcarbon regeneration.....................................................................................................15
(c)
Air stripping........................................................................................................................................... 5
(d)
Denitrfiicatlon Process..............................................................................................................................1 0
(8)
Efectrodlalysfs............................................................................................................................................5
(1)
Foam Separation............................................................... .................... ....................... ............................. ar
(g)
Ion Exchange............................................................................................................................................5
(h)
Land Application of Treated Effluent (see definition No. 22b) (not applicable for sand. gravel, stone
and other similar mining operations) by high rate Infiltration..........................................................................4
(1)
Microscresns........................................................................................................................................... 5
(1)
Phosphorous Removal by Blotoglcat Processes (See definition No. 26).........................................................2 0
(k)
Polishing Ponds - without aeration.............................................................................................................2
withaeration.................................................................................................................5

(1)
Post Aeration - cascade..............................................................................................................................0
diffusedor mechanical........................................................................................................2
(m)
Reverse Osmosis.........................................................................................................................................5
(n)
Sand or Mixed -Media Filters - law rate..........................................................................................................2
highrate......................................•---............................5
(o)
Treatment processes for removal of metal or cyanide...................................................................................1 5
(p)
treatment processes for removal of toxic materials other than metal or cyanide..............................................1 5
(7)
SLUDG E TRE4TMENr
(a)
Sludge Digestion Tank - Heated (anaerobic)...............................................................................................1 0
Aerobic..............................................................................................................................................5
Unheated(anaerobic) ...... ......... .......................... ____ ..................... .............. ........................................... 3
(b)
Sludge Stabilization (chemical or thermal)....................................................................................................6
(c)
Sludge Drying Beds - Gravity......................................................................................................................2
VacuumAssisted ...... ...............................................................................................................................A
(d)
Sludge Eluldation.....................................................................................................................................5
(0)
Sludge Conditioner (chemical or thermal).....................................................................................................5
(f)
Sludge Thickener (gravity)..........................................................................................................................5
(g)
Dissolved Air Flotation Unit (not applicable to a unit rated as(31(i)].............................................................a
(h)
Sludge Gas Utilization (including gas storage).............................................................................................2
(1)
Sludge Holding Tank - Aerated...................................................................................................................5
Non-aeratad........ .................................................................................................................... ................. 2
(�)
Sludge Incinerator (not Including activated carbon regeneration)................................................................1 0
(k)
Vacuum Rfter, Centrifuge, or Filler Press or other similar dewatering devices...................................................1 0
(8)
RESIDUALS UTILIZATIOWDISPOSAL (including Incinerated ash)
(a)
Lagoons..................................................................................................................................................2
(b)
Lard Application (surface and subsurface) (see definhion 22a)
by contracting to a land application operator or landfill operator who holds the Sand application permit
orlandfill permit........................................................................................................................................2
(c)
Dedicated Landfill(burlal) by the permittee of the wastewater iroatmeni facility...............................................5
(9)
DGINF CTKIN
(a)
Chlorination..............................................................................................................................................5
(b)
Dechlorination.................................. .................................... ....................... ...................................... ....... 5
(c)
Ozone......................................................................................................................................................5
(d)
Radiation...................................................................................................... .............. .........5
(1 0)
CHEMICAL
ADDITION SYSTEM(S) ( see definition No. 9) (not applicable to chemical additions rated as hem (3)(1),
(5)(a,)(xi),
(6)(a), (6)(b), (7)(b), (7)(e), (9a), (9)(b) or (9)(c) 5 points each.
List....................................................................................................................................5
......................................................................................................................... I ....1....5
................................................................................ .......5
.........................................................................................................................5
(1 1)
MISCELLANEOUS UNITS•PROCESSES
(a)
Holding Ponds, Holding Tanks or Settling Ponds for Organic or Toxic Materials including wastes from mining
operations containing nitrogen or phosphorus compounds In amounts significantly greater than is common
for domestic wastewater............................................................................................................................4
(b)
Effluent Row Equalization (not applicable to storage basins which are inherent In land application systems) ...... 2
(c)
Stage Discharge (not applicable to storage basins Inherent In land application systems)..................................5
(d)
Pumps.............................................................. ........................................................................................3
(e)
Stand -By Power Supply.............................................................................................................................3
(f)
Thermal Pollution Control Device.................................................................................................................3
TOTAL POiNTS..........................................................................
701W.K:t—.111200. f is
ClassI...........................................................................................................5-25 Points
ClassII........................................................................................................26-50 Points
ClassIII ................................. ....................................................................... 51-65 Points
ClassIV ...................................................... ............................................... ..66-Up Points
Facilfties having a rating of one through four points, Inclusive, do not require a cartitied operator.
Facilities having an activated sludge process wilf be assigned a minimum classification of Class 11.
Facilities having treatment processes forthe removal of metal or cyanide will be assigned a minimum classification of Class 11.
Facilities having treatment processes for the biological removal of phosphorus will be assigned a minimum classifkation of Class III.
MU DEFINITIONS
The following definitions shall apply throughout this Subchapter.
(1) Acllvated Carbon Beds. A physlcal/chemical method for reducing soluble organic material from wastewater effluent; The column -type beds used In this
method will have a flow rate varying from two to eight gallons per minute per square loot and may be either upflow or downflcw carbon beds. Carbon may or
may not be regenerated on the wastewater treatmerrl plant site;
(2) Aerated Lagoons. A basin in which all solids are maintained in suspension and by which biological oxidation or organic matter is reduced through artificially
accelerated transfer of oxygen on a flow -through basis;
(3) Aeration. A process of bringing about Intimate contact between air or high purity oxygen In a liquid by spraying, aghatlon or dlttusion;(3a) Extended
Aeration. An activated sludge process utilizing a minlmum hydraulic detention time of 16 hours.
(4) Agricuhurally managed site. Any site on which a crop is produced, managed, and harvested (Crop Includes grasses, grains, iraes, etc.);
(5) Air Stripping. A process by which the ammonium ion is first corrverted to dissolved ammonia (pH adjustment) with the ammonia then released to the
atmosphere by physical means; or other similar processes which remove petroleum products such as benzene, toluene, and xylene;
(6) Carbon Regeneratlon The regeneratlon of exhausted carton by the use of a furnace to provide extremely high lemperwLires which volatilize and oxidize file
absorbed impurties;
(7) Carbonaceous Stage. A stage of wastewater treatment designed to achieve 'secondary' effluent Ilmhs-,
(8) Centrifuge. A mechanical device In which centrifugal force Is used to separate solids from liquids a to separate liquids of ddferent densirtlas;
(9) Chemical Addition Systems-- The addttlon of chemlcal(s) to wastewater at an application point for purposes of Improving solids removal, pH adjustment,
alkalinity control, etc.; the capability to experiment with different chemicals and different application points to achieve a specific resuh will be considered one
system; the capability to add chemical(s) to dual units will be rated as one system; capabiltty to add a chemical at a different application points for different
purposes will result in the systems being rated as separate systems;
(10) Chemical Sludge Conditioning. The addition of a chemlcal compound such as lime, ferric chloride, or a polymer to wet sludge to coalesce the mass prior to
Its application to a dewatenrig device;
(11) Closed Cycle Systems. Use of holding ponds or holding tanks for containment of wastewater containing inorganic, non -toxic materials from sand, gravel,
crushed stone or other similar operations. Such systems shall carry a maximum of two points regardless of pumping facilities or any other appurtenanxss;
(12) Combined Removal of Carbonaceous DOD and Nitrogenous Removal by Nitrification- A single stage system required to achieve permit effluent limits on BCD
and ammonla nitrogen within the same biological reactor,
(13) Dechlorinaiion. The partial or complete reduction of residual chlorine in a liquid by any chemica3 or physical process;
(14) Denftrilication Process. The conversion of nitrate -nitrogen to nitrogen gas;

(15) Electrodialysis. Process for removing Ionized safts from water through the use of ion -selective ion -exchange membranes;
(16) Fitter Press. A process operated mechanically for partially dewater(ng sludge;
(17) Foam Separation. The planned frothing of wastewater or wastewater effluent as a means of removing excessive amounts of detergent materials through
the introduction of air In the form of fine bubbles; also called foam fractionation;
(18) Grit Removal. The process of removing grit and other heavy mineral matter from wastewater;
(19) Imhoff Tank. A deep two story wastewater tank consisting of an upper sedimentation chamber and a lower sludge digestion chamber.
(20) Instrumented Row Measurement. A device which indicates and records rate of flow;
(21) Ion Exchange. A chemical process in which ions from two different molecules are exchanged;
{22) Land application:
(a) Sludge Disposal. A final sludge disposal method by which wet sludge may be applied to land either by spraying on the surface or by subsurface injection
(i,e., chisel plow); (not applicable for types of sludge described In (11) of this Rule];
(b) Treated Effluent. The process of spraying treated wastewater onto a land area or other methods of application of wastewater onto a land area as a
means of final disposal or treatment;
(23) Microscreen. A low speed, continuously back -washed, rotating drum filter operating under gravity conditions as a polishing method for removing
suspended solids from effluent;
(24) Nitrification Process. The biochemical conversion of unoxidized nitrogen (ammonia and organic nitrogen) to oxidized nitrogen (usually nitrate);
(251 Nitrogenous Stage. A separate stage of wastewater treatment designed for the specific purpose of converting ammonia nitrogen to nitrate nitrogen;
(26) Phosphate Removal, Biological. The removal of phosphorus from wastewater by an oxiclanoxic process designed to enhance luxury uptake of phosphorus
by the microorganisms;
(27) Pollshing Pond. A holding pond following secondary treatment with sufficient detention time to allow settling of finely suspended solids;
(28) Post Aeration, Aeration following conventional secondary treatment units to Increase effluent D.Q. or for any other purpose;
(29) Post Aeration- (Cascade) A polishing method by which dissolved oxygen is added to the effluent by a nonmechanical, gravity means of flowing down a
series of steps or weirs; The flow occurring across the steps or weirs moves in a fairly thin layer and the operation of the cascade requires no operator
adjustment; thus, zero points are assigned even though this Is an essential step to meeting the limits of the discharge permit;
(30) Powdered to Granular Activated Carbon Food. A biophysical carbon process that utilizes biological activity and organic absorption by using powdered or
granular activated carbon; Virgin or regenerated carbon is feed controlled into the system;
(31) Proaeralion- A tank constructed to provide aeration prior to primary treatment;
(32) Preliminary Units. Unit operations in the treatment process, such as screening and comminution, that prepare the liquor for subsequent major operalions;
(33) Industrial Pretreatment.
(a) Pre-treatment Unit, Industrial. The conditioning of a waste at €ss source before discharge, to remove or to neutralize substances Injurious to sewers and
treatment processes or to effect a partial reduction in load on the treatment process which is operated by the same governing body as the wastewater
treatment plant being rated;
b) Pre-treatment Program, Industrial - must be a State or EPA required program to receive paints on the rating shoot;
(34) Primary Clarifiers. The first settling tanks through which wastewater is passed In a treatment works for the purpose of removing settleable and suspended
solids and BOO which Is associated with the solids;
(35) Pumps. All influent, effluent and in-piant pumps;
(36) Radiation. Disinfection or sterilization process utilizing devices emitting ultraviolet or gamma rays;
(37) Reverse Osmosis. A trealment process In which a heavy contaminated liquid Is pressurized through a membrane forming nearly pure liquid free from
suspended solids;
(38) Rotating Biological Contractors. A fixed bioiogical growth process in which wastewater flows through tanks in which a series of partiaily submerged circular
surfaces are rotated;
(29) Sand Filters;
(a) Intermittent Biological. Filtration of effluent following septic tanks, lagoons, or some other treatment process in which further biodecomposhlon is
expected to produce desired Bliluents; Hydraulic loading rates on these fihers are computed In gpolac and have a resulting low gpm/sl (less than one);
b) Recirculating biological - the same type of sand filter as defined in Subparagraph (39) (a) of this Rule with the added capability to recycle effluent back
through the sand lifter;
(40) Sand or Mixed -Media Fitters. A polishing process by which effluent llmas are achieved through a further reduction of suspended solids;
(a) low rate -- gravity, hydraulically loaded filter with loading rates In the one to three gpmisf range;
(b) high rate -- a pressure, hydraukcally loaded finer wart loading rates in the five gprrVsi range; At any rate, the loading rate will exceed three gprrVsi;
(41) Secondary Clarifiers. A tank which follows the biological unit of treatment plant and which has the purpose of removing sludges associated with the
biological treatment units;
(42) Separate Sludge Reaeration. A part of the contact stabilization process where the activated sludge is transfelred to a tank and aerated before returning it
to the contact basin;
(43) Septic Tank. A single -story settling tank In which settled sludge is in contact with the wastewater flowing through the tank; shall not be applicable for
septic tank syslems serving single family residences having capacity of 2,000 gallons or less which discharge to a nitrtficaticn field;
(44) Sluoge Digestion. The process by which organic or volatile matter and sludge is gasified, liquefied, mineralized or converted into more stable organic rtialter
through the activity of living organisms, which Includes aerated holding tanks;
(45) Sludge Drying Beds. An area comprising natural or artificial layers of porous materials upon which digested sewage sludge Is dried by drainage and
evaporation;
(46) Sludge Elutriation. A process of sludge conditioning In which certain constituents are removed by successive washings with fresh water or plant effluent:
(47) Sludge Gas UlAtzation. The process of using sewage gas for the purpose of heating buildings, driving engines, etc.;
(48) Sludge Holding Tank (Aerated and Nonaerated). A tank utilized for small wastewater treatment plants not containing a digester In which sludge may be
kept fresh, and supematant withdrawn prior to a drying method (i.e. sludge drying beds); This may be done by adding a small amount of air simply to keep the
sludge fresh, but not necessarily an amount that would be required to achieve stabilization of organic matter. A nonaerated lank would simply be used to
decant sludge prior to dawaloring and would not allow long periods (several days of detention) without resufting odor problems;
(49) Sludge Incinerators. A furnace designed to bum sludge and to remove all moisture and combustible materials and reduce the sludge to a sterile ash;
(50) Sludge Stabilization (Chemical or Thermal)- A process to make treated sludge less odorous and putrescble, and to reduce the pathogenic organism
content; This may be done by pH adjustment, chlorine dosing, or by heat treatment;
(51) Sludge Thickener. A type of sedimentation tank In which the sludge Is permined to settle and thicken through agitation and gravity;
(52) Stabilization Lagoon. A type of oxidation lagoon in which biological oxidation of organic matter Is affected by natural transfer of oxygen to the water from
air (not a polishing pond);
(53) Stand -By Power Supply. On she or portable electrical generating equipment;
(54) Static Screens, A stationary screen designed to remove solids, including nor -biodegradable particulate (fioalabla solids, suspended solids and BOO
reduction) from municipal and industrial wastewater treatment systems;
(55) Tertiary Treatment. A stage of treatment following secondary which is primarily for the purpose of effluent polishing; A settling lagoon or sand or coal finer
might be employed for this purpose;
(56) Thermal Pollution Control Device- A device providing for the transfer of heat from a fluid flowing in tubes to another fluid outside the tubes, or vice versa;
or other means of regulating liquid temperatures;
(57) Thermal Sludge Conditioner. A conditioning process by which heat Is added for a protracted period of time to improve the dewaterabilhy of sludge by the
solubilizing and hydraulizing of the smaller and more highly hydrated sludge particles;
(58) Toxic Materials. Those wastes or combinations of wastes, Including disease -causing agents which after discharge and upon exposure, Ingestion, Inhalation
or assimilation into any organism, either directly from the environment or indirectly by ingestion through food thains, will cause death, disease, behavioral
abnormalities. cancer, genetic mutations, physiological malfunctions (Including malfunctions In reproduction) or physical deformMions, In such organisms or their
offspring; Toxic materials Include, by way of Illustration and riot Ilmhatlon: lead, cadmium, chromium, mercury, vanadium, arsenic, zinc, ortha-nitro-chlorobenzene
(ONCB), polychlorinated biphenyls (PCBs) and dlchlorodiphenyl trichloroelhane (DDT); and any other materials that have or may hereafter be determined to have
toxic propertles;
(59) Trickling Filter. A biological treatment unit consisting of a material such as broken stone or rock over which wastewater is distributed; A high rate trickling
filter is one which operated at between 10 and 30 mgd per acre. A low rate trickling filter is one which is designed to operate at one to four mgd per acre;
(60) Trickling Fitter (Packed Tower). A plug flow type of operation In which wastewater flows down through successive layers of media or filtrate material; Organic
material is removed continually by the active biological fixed growth in each successive layer. This method may produce 'secondary' quality etfluBnt, or may be
adapted to produce a nitrified effluent;
(61) Vacuum Fitter. Centrifuges, or Filter Presses. Devices which are designed tc remove excess water from either digested or undigested sludge prior to disposal
or further treatment.