WQ0006122_Final Permit_19920413

State of North Carolina A
DeparUnent of Environment, HegUh' •knd Natural Resources
Division of Envinaniiiental.Manage '
512 North Salisbury Street -}Raleigh, North QlkoI44 27b11
Yarn G. M.,rL, Governor George T. Everett, MLD
Wnliam W. Clobey, Sr., Secretary Dire=
Apol.13, 1992
fv . W.,99 .,Moore, District Engineer
Division of Highways
-Pp�,t Offroe_oox 928
Pi duth, North Carolina 27962
ubject: Perrrait No.WQ0006m
N.C. Mgat si- at of Trpsportadi n
Division (if Nigh#l~ys
C��s�v�11P?t'lairt
Scffibbcr Wa�z`"Sjettling and Recycle
aslgtri County
Dear Mr. Moore:
In accordance with your application receSV; Januaxy 30, 1992 we = forwarding herewith Permit
No. WQO{]36I22 datedril 13, 1992 ti3VpartirrsYit.of Tranoxtation Division of highways for
the continued operation. the suhleCT"Wv,�wa :re7d� iyS,em:
This permit shall be effectiV6 frorri.the date of issuance until March 31, 1997 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 estab�sh an adequate system for collecting and maintaining the
required operational information will re h in future compliance problems. Issuance of this permit hereby
��voi,";1 1 eft 1'"So.� 49k71 is 9 AuWust 1.1, .1987,.
r,
If any parts, requirements, or limitations contained in this permit are unacceptable io y6u, you have
the right to request an a4judicatory bearing.upon w itten ,request within 30 days f9l,lowir g'receip# of his
pen-rnt. This request must be in the form v a, uteri petition, conforming to Chair„1Sa1 of North
Carotin General. Statutes, and filed with me:.(3fAcc of Administrative rIearings,.V..3:'rawer 2744
7,
Raleighb,J 1C 27611-27447,�(Jnles� surf di nes are-: Wade this permit - sball b -Ural a0o )finding. :
Regional Offices
Ashe.ville Fayetteville Mooresville Raleigh Washington Wilmington Winston-Salem
704/251-6208 919/486-1541 7041663-1699 9191733-2314 919/946-6481 919/395-3900 919/896-7007
Pollution Pr?ver:tion Pays
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone]
An Equal Opportunity Affirmative Action Employer

If you need additional information concerning this matter, please contact Mr. John Seymour at 9191
733-5083.
u
cc: Washington County Health Department
Washington Regional Office, Water Quality
Mr. C.O. White, N.C. DOT Division One
Facilities Assessment Unit
Washington Regional Office, Groundwater
Groundwater Section, Jack Floyd
Trairnvng and Certification Unit

NORTH CAROLINA
ENVIRONMENTAL MANAGEMENT COMMISSION
DEPARTMENT OF ENVIRONMENT, HEALTH AND NATURAL RESOURCES
RALEIGH
RECYCLE 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
N.C. Department of Transportation, Division of Highways
Washington County
FOR THE
continued operation of a 19,200 GPD wastewater recycle system consisting of a 20 foot by 45 foot by S
foot deep settling basin connected in series with a 410 foot by 500 foot by 15 foot deep pond (old 4 acre
sand pit) for removal of sand particles from scrubber water generated from the N.C. Department of
Transportation's Creswell Asphalt Plant, and associated pump and piping to convey clear water back to the
scrubber to serve the Creswell Asphalt Plant with no discharge of wastes to the surface waters, pursuant to
the application received January 30, 1992 and in conformity with the project plan, specifications, and other
supporting data subsequently filed and approved by the Department of Environment, Health and Natural
Resources and considered a part of this permit.
This permit shall be effective from the date of issuance until March 31, 1997 and shall be subject to
the following specified conditions and limitations:
1. This permit shall become voidable unless the facilities are constructed in accordance with
the conditions of this permit, the approved plans, 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. The facilities shall be properly maintained and operated at all times.
4. 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 of Environmental Management accompanied by an application
fee, documentation from the parties involved, and other supporting materials as may be
appropriate. The approval of the request will be considered on its merits and may or may
not be approved.
5. In the event that the facilities fail to perform satisfactorily, including the creation of
nuisance conditions, the Permittee shall take immediate corrective action, including those as
may be required by this Division, such as the construction of additional or replacement
wastewater treatment or disposal facilities.
C

6. The sludge generated from these treatment facilities must be disposed of in accordance with
General Statute 143-215.1 and in a manner approved by the North Carolina Division of
Environmental Management.
7. 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.
8. 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.
9. Diversion or bypassing of untreated wastewater from the treatment facilities is prohibited-
10. Freeboard in the settling basins shall not be less than one foot at any time.
11. Any monitoring deemed necessary by the Division of Environmental Management to insure
surface and ground water protection will be established and an acceptable sampling
reporting schedule shall be followed.
12. Adequate inspection, maintenance, and cleaning shall be provided by the Permittee to
insure proper operation of the subject facilities.
13. The Permittee or his designee shall inspect the wastewater recycle 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 of Environmental Management or other permitting authority.
14. Any duly authorized officer, employee, or representative of the Division of Environmental
Management may, upon presentation of credentials, enter and inspect any property,
premises or place on or related to the recycle system at any reasonable time for the purpose
of determining compliance with this permit; may inspect or copy any records that must be
kept under the terms and conditions of this permit; or may obtain samples of groundwater,
surface water, or leachate.
15. 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 15 NCAC 2H .0205
(c)(4).
16. Failure to abide by the conditions and limitations contained in this permit may subject the
Permittee to an enforcement action by the Division of Environmental Management in
accordance with North Carolina General Statute 143-215.6A to 143-215.6C.
17. 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.
18. A set of approved plans and specifications for the subject project must be retained by the
Permittee for the life of this project.
4

19. Noncompliance Notification:
The Permittee shall report by telephone to the Washington Regional Office, telephone no.
919/ 946-6481 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:
a. 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 basin or tank; the known passage of a slug of
hazardous substance through the facility; or any other unusual circumstances.
b. 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 is not in
compliance with its permit limitations.
Persons reporting such occurrences by telephone shall also file a written report in letter
form within 15 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.
20. Upon classification of the facility by the Certification Commission, 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 Certification Commission. The Permittee must also employ a
certified back-up operator of the appropriate type and grade to comply with the conditions
of Title 15A, Chapter 8A, .0202. The ORC of the facility must visit each Class I facility at
least weekly and each Class II, 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 Title 15A, Chapter 8A, .0202.
21. The Perrnittee, 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.
22. Issuance of this permit hereby voids Permit No. 14971 issued August 11, 1987.
Permitjssued this the 13th day of April 1992
CAROLINA ENVIlWNNjENTAL MANAGEMENT COMMISSION
WX
George T. Ev ett, irec `
Division of En ' onrnen M agement
By Authority of th vir ntal Management Commission
Permit No. WQ0006122
5

• S
F / �
oil f
.box¢:ems' f
4' 1 ! y ,#+. #I r# 1
(it# # #y 1 1 # 1# 04 1#f r #J
r
If
t #'� It ##r#I#t#I##t#r#I�
g �#rFl#r##+ I !#+ �I � �a• ,�#.1'#rr�###r#;##I#'##r##�,yr#1# I#1#r#��
r
w
,', r1 ' FQ I#. I I #I # IF, m \
�j� # ' •� # ! 1 t M +r4� 1 # J , f ! r # F co
1 rf in ti nx_ 4,
! I II#
,y I I to
Io '=3NYT Aas
F II r # --_-- - .'o
J1¢ `"#J#rFr#1y+«J4 #r 1 F#►#, '##I f;��� ��r_ ru�•,�`
\�t, �I�, >�.� f# !�!'� �r +�' #+#1� t1 1 ##F � 'I#�Ik-+ E [1 �•' �• f., f1##I##+I \a n•5,
+�# x��'#,e F��rf r# # } !#r #I #'�#�,�1 ## ##,# �.Fx#!##1#.yl # +. ��k###,# ►1##�. `..1it
'o
�bns
#+##r#' �•; r— �V, u.� 2.
\\# •�. �+#}y�a�}��� ,f l�#r r+ 1#'f'#�' � ##!IF r�,y, 1 'a � ?� i #� #1#'�'F#N,�,t
+ T .� .� #: F# ! •�T �f y F f, TEs � � i i ' I. T .�j T a # � r t, I r � J '.d,
►s } # F #+' E ET £� 1IrTI s # -�;## ,�, r ''; a';#'r #r'.;# f«+''
mI
#+
#
_ r �� *# �#' J � r>~ # , t: �s�• � # f#,# l�� y r t 1 y#r�# �#1 � '',��, � x
cr
X1, # e
if 1F'F 1rlt.
• � !�-,#, rF}�,#!F ,�,#� #r�1#�#'#. �r'f�rl V �� t •ate@ �### #� #, ##y}}'y'FIF1 I# 1 ;.___
,F t. •F�-�� � r r f .�
IT*s '#1##r#f� ly'y y1# .,o �'t;1,
1 ,I , Fr#. #,# �• i�� F: � i��' rirF'Ft 1 ''r1�r I#f ,#,r IFI•#r rye �.ff
r¢F
1 # r rtrs 1 Is
re, off #r# #+#► `� r##r # #J## r r # ee +I
+r;# 1J ## # r + # f #r!
###•^- 'P � r#' I�+4 ��
#F! #'F; #?', :1 r rr#'}##' ;.� ,'
+ �1+# r f F #'f'# f �,'l r� #:; # # +#f IFt�i . #'r i##�# ! #r r#+ I I r#
s:F; + #f + # 1 # # + ft J ## # }I It
#
+; #, F#F'# ;#rir l # #! # .•°` ###—,Fr## 1#Iyl �r f#t #r #1#�#' y
.# # #!�I#�-s 1i' F# F I�. �•# + •-� ��1#! +###; # #r ## Ir,#, r## ##1�f#�y # �I r+�
Fl,ry''#'##,rtr#1 f# F #+.; # J# ### r
r### # ##' J# # !# #I# ###+ y # rtl'� + y # •
r #r# 1 1 # 1 1 1' •t 1 # r 1
1 1 ,, irlk#, ###r'�+#r ff �1#,## r##+#Iry r
##.#r#r#},!#+1,# # ;a+ #r##r## # #
IF! +t#;,te, y f•_., J #.##r #r#r
###f#r #r #F,F#; 1t# �r#r# r # f#+# #,U• #+# +###,# ##,I#r+k,# # # px f
' # ### r # # r#I#'#r###,#+#t###I #'#'#r ##+# �i+sr#.##+
' ##!##'# ## #I## r1,• — o''#r##J#'# y ,#+4 J#I# # # F#•#r # #r Of # # J#r#I �yr'F►## # I #F r
yF 4f.r+1orl�1>� tr#1# # I# # ##j,: /f t#,4#r#t� ##.# ##r�#!#rr #J r# # #, I# # ikFr r y 1
Fr r # r r t
r r I� + # # r# #r ' '' #1# !+ # #+, +# + #'# I 1i} j# #
+##+###1#/ '+• #'####' # #f## # r## ## #I#r , r r## I#r'r+
►r "### ' �,•�—y rr#!11! �, f# #r# #r#f ##,## ## �,#####'#'#####ty lyre}#r#.}#,'f1
# rl' r f ' ' # �' �# to # # # # x # r##I# #I # r # r 1{+ r # J {r� y,af #' ,} #+y off
# # #t F r 1 ' # ° # , - • #' ' rt - L 1 , #' f # # r, f r1 r T I # r P'# f #r # # I T
1 #•# # . `�• /. r # ! r r #+ # r##'N # #1 # # ##r # j ' !# I 1 # 1 #' # It f r ' # F F # #! r f
#r F#. F`# # rt#' #I# #f#,#f#J #,# #+# #+ + + #, # r # # r # # # 1# #
+y+y # r #t I r r #1 "fir# #J r##Ilfl,}r#I#J#r#1##,1####r## r #f##1#r# off.
I#r ,##'
1► '#F # #I# #o # # r
.� #' #I #r #'i� J#�#f#+#�1#r��r# # # #,# ##' + I#1rr#
#t#1##r,� ,#'�#I #l# r##+# t#1!#i#,#r##I##r#r # # ### 1#,1
rr1'bl#�#, ##F# 1###r!#'##r+##1# #1 #+1�r#rF ,r#I}i #,F+w!#'y:#,�•#
#.f
#,# r t, # + # r r# #r #+ r# # # # # '# #I J #+ r#!# #+ #'# 1r#' + #+. +#F
#J #+#1#+ ###+#r##r# r1# ##+ ,#r r#,###, # # #•#, rl.J#r
I# a #�,##11#r#f## #+## #r of
off #1 # ## !,! +' s#1 #!
# !# f#e+ # #',+,# 1#I #' #J# r#r ,y,'S5 ####1#'#r#+#J#JI #+ # +#r#J###,# # s #
##r#r#11## T !! # #I#1 ##11# r###7+ #f#
r#'�#�#,#' #r # #r##''#
t .,:'.n r#',�•# i _'�# r It �r#!l. #,##r�t.rt#+�' �_ ����� ��'_€�=1 #�#i�� I yl��, #1�� + f#r# #� r,t— = #--# _� � FT#y_rl r41,+

RATING SCALE FOR CLASSIFICATION OF FACILITIES
REM
(1)
(2)
(3)
Name of Plant:.,__-C, Vol Creswell tf3ql
Owner or Contact Person: W, f Ml nee. _
Mailing Address: NC Vol 0rdi3i."a%kw-iysT729
County: WaITelephone:
NPDES Permit No. NCiDQ Nandisc. Per. No. bVjg aqQ G/Zz
lssueDate: Expiration Date: 0Ig h
Existing Facility l_ New Facility
Rated By: ) Sr mom.- Date:_ t7�7 /9z-
Reviewed (Train. & Cert.) Reg. Office
Reviewed (Train. & Cert.) Central Office
ORC Gfade
Plant Class: (circle one) 3) 11
POINTS
Industrial Pretreatment Units and/or
Industrial Pretreatment Program
(see definition No. 33)
4
DEal } FLOW OF PLANT IN GPD
(not applicable to non -contaminated cooling waters, sludge
handling facilities for water purification plants, totally
closed cycle systems (del. No. 11), and facilities
consisting only of Item (4) (d) or Items (4) (d) and (11) (d))
D -• 20,000..........................
1
20,001 -- 50,000..........................
2
50,001 -- 100,000..........................
3
100,001 -- 250,000..........................
4
250.001 •- 500,000..........................
5
500.001 --1,000,000..........................
8
1,000,001 -• 2,000.000 ........................
10
2,000,0D1 (and up) - rate 1 point additional for each
200,000 gpd capacity up to a
maximum of 30
Design Flow (gpd) :
PRELIMINARY UNITS (see definition no. 32)
(a) Bar Screens ................................ 1
or
(b) Mechanical Screens, Static Screens or
ComminutingDevices ........................ 2
(c) Grit Removal ............................... 1
or
(d) Mechanical or Aerated Grit Removal ........... 2
(e) Flow Measuring Device ....................... 1
or
(f) Instrumented Flow Measurement .............. 2
(g) Preaeration................................ 2
(h) Influent Row -Equalization ...... 2
(i} Grease or Oil Separators - Gravity .......... 2
Mechanical .......... 3
Dissolved Air Flotation. 8
G) Prechlorination .............................. 5
(4) PRIMARY TREATMENT UNITS
(a) Septic Tank (see definition no. 43) ..............
(b) Imhoff Tank ..................................
(c) Primary Clarifiers .......... ................ .
(d) Settling Ponds or Settling Tanks for Inorganic
Non -toxic Materials {sludge handling facilities
for water purification plants, sand, gravel,
Slone, and other mining operations except
recreational activities such as gem or gold
mining} .....................................
2
5
5
a
III IV Total Points L
(5) SECONDARY TREATMENT UNITS
(a) Carbonaceous Stage
(i)Aeration - High Purity Oxygen System .....
Diffused Air System ...........
Mechanical Air System (fixed,
floating or rotor) ....... ..... .
Separate Sludge Reaeration ....
(if) Trickling Filler
High Rate ...................
Standard Rate ...............
Packed Tower...............
(iii) Biological Aerated Filler or Aerated
Biological Filter ......................
(iv) Aerated Lagoons ..................... .
(v) Rotating Biological Contactors ......... .
(vi) Sand Fillers -
intermittent biological .... .
recirculating biological .... .
(vn) Stabilization Lagoons ...................
(viif)Clarifier ..............................
(ix) Single stage system for combined
carbonaceous removal of BOD and
nitrogenous removal by nitrification
(see del. No. 12) (Points for this Item
have to be in addition to items (5) (a)
(i) through (5) (a) (vin) ....... ........ .
(x) Nutrient additions to enhance BOD
removal. .... .........
(xi) Biological Culture ('Super Bugs-) addition
to enhance organic compound removal .... .
(b) Nitrogenous Stage
(i) Aeration - High Purity Oxygen System .... .
Diffused Air System ...........
Mechanical Air System (fixed,
floating, or rotor) ...... ......
Separate Sludge Reaeration .....
(if) Trickling Filter -
High Rate ..............
Standard Rate ............
Packed Tower............
(iii) Biological Aerated Filter or Aerated
Biological Filter ................... .... .
(iv) Rotating Biological Contactors ............
(v} Sand Filter -
intermittent biological ... , ... .
recirculating biological ....... .
(vi) Clarirrer................................
20
10
8
3
7
5
5
10
10
10
2
3
5
8
5
5
20
10
8
3
7
5
5
10
10
2
3
5

ftr
(6) TERTIARY OR ADVANCEDTREATMENT UNIT
(10) -CHEMICAL ADDITION SYSTEM (S) (See definition No. 9)
(a)
Activated Carbons Beds -
without carbon regeneration ..................
5
(not applicable to chemical additions rated as item
with carbon regeneration ........... ...
15
{3) (5) (a) (xi), (6) (a), (6) {b), (e),
(b)
Powdered or Granular Activated Carbon Feed -
: List:
a). each:
(g) (a), {9) {b), or {9) {c) 5 points each: List'
without carbon regeneration .................
5
5
5
with carbon regeneration ....................
is
5
(0)
Air Stripping ...........................
5
..
5
(d)
Denitrificalion Process (separate process) ... ..
10
(e)
Electrodialysis ........_....................
5
(11) MISCELLANEOUS UNITS
(I)
Foam Separation ... . .........................
5
(a) Holding Ponds, Holding Tanks or Settling Ponds
(g)
ton Exchange ................................
5
for Organic or Toxic Materials including wastes
(h)
Land Application of Treated Effluent
from mining operations containing nitrogen and/or
(see definition no. 22b) (not applicable for
phosphorous compounds in amounts significantly
sand, gravel, alone and other similar mining
greater than is common for domestic wastewater ..........
4
operations)
(b) Effluent Flow Equalization (not applicable to storage
(i) on agriculturally managed sites (See def.
basins which are inherent in land application systems).
2
No. 4)...................................
10
(c) Stage Discharge (not applicable to storage basins
(ii) by high rate infiltration on non -agriculturally
inherent in land application systems.......... 1. ........... . .. ........
5
managed sites (includes rotary distributors
(d) Pumps ----. �.„........ �. . „..._ . _ ... r . Q
and similar fixed nozzle systems) ...........
4
(e) Stand -By Power Supply. _... . „ _.
(W) by subsurface disposal (includes low pressure
(1) Thermal Pollution Control Device.„. ._ ....
3
pipe systems and gravity systems except at
plants consisting of septic tank and nitrifica-
tion lines only) .................. „ .........
4
TOTAL POINTS
()
Microscreens ...............................
5
{j)
Phosphorus Remoral by Biological Processes
CLASSIFICATION
(See def. No.26) ....... ...... ...........
20
(k)
Polishing Ponds - without aeration .......
2
Class L.. „. _ W„ „._ 5 - 25 Points
with aeration ..........
5
Class 26- 50 Points
(1)
Post Aeration cascade ..............
0
Class 1!1 „„ . „.._. .. 51. 65 Points
diffused or mechanical ...
5
Class IV_---- 66- Up Points
(m)
Reverse Osmosis ...............................
5
(n)
Sand or Mixed -Media Filters - low rate ...........
2
Facilities having a rating of one through four points, inclusive,
Nigh rate . , ........
5
do not require a certified operator. Classification of all other
(o)
Treatment processes for removal of metal or
facilities requires a comparable grade operator in responsible
cyanide ....................................
15
charge.
(p)
Treatment processes for removal of toxic
materials other than metal or cyanide .........
15
Facilities having an activated sludge process will be assigned
a minimum classification of Class If.
SLUDGE TREATMENT
(8)
19)
(a) Sludge Digestion -Tank - Heated ............... 10
Aerobic ............... 5
Unheated ............. 3
(b) Sludge Stabilization (chemical or thermal) ....... 5
(c) Sludge Drying Beds - Gravity...... ... . - . . . .. 2
Vacuum Assisted ....... 5
(d) Sludge Elutrialion ...... ...... ... ..........
5
(e) Sludge Conditioner (chemical or thermal) ........
5
(f) Sludge Thickener (gravity) ......................
5
(g) Dissolved Air Flotation Unit
(not applicable to a unit rates as (3) @ .........
8
(h) Sludge Gas Utilization (including gas storage) ....
2
(i) Sludge Holding Tank - Aerated ................
5
Non -aerated ............
2
(j) Sludge Incinerator - (not including activated
carbon regeneration) .. ..
10
(k) Vacuum Filler, Centrifuge or Filter Press or other
similar dewatering devices ....................
10
SLUDGE DISPOSAL (including incineraled ash)
(a) Lagoons...... ... ................ ........
2
(b) Land Application (surface and subsurface)
(see definition 22a)
-where the facility holds the land app. permit ...
10
-by contracting to a land application operator who
holds the land application permit .......... ....
. 2
-land application of sludge by a coniractor who does
not hold the permit for the wastewater treatment
facility where the sludge -is generated .........
10
(c) Landfilled (burial) ..............................
5
DISINFECTION
(a) Chlorination .............................
5
(b) Dechlorinalion ........................
5
(c) Ozone........... ...................
5
(d) Radiation ..........................
5
Facilities having treatment processes for the 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 classification of Class
Ill.
In -plant processes and related control equipment which are an
integral part of industrial production shall not be considered waste
treatment. Likewise, discharges of wastewater from residences
having a design flow of 1,000 gpd or less, shall not be subject to
rating.