WQ0002702_Final Permit_19930408

State of North Carolina
Department of Environment, Health and Natural Resources
Division of Environmental Management
512 North Salisbury Street - Raleigh, North Carolina 27604
.fames B. Hunt, Jr., Governor
Jonathan B. Howes, Secretary
April 8, 1993
Mr. Randall F. Andrews
Alchem, Incorporated
Route 2, Box 521-C
Red Springs, North Carolina 28377
A. Preston Howard, Jr., P. E.
Director
Subject: Permit No. WQ0002702 Amendment
Alchem, Incorporated
Industrial Recycle - Bauxite Process
Wastewater Recycle System
Rowan County
Dear Mr. Andrews:
In accordance with your application received October 19, 1992, we are forwarding herewith Permit
No. WQ0002702 as amended, dated April 8, 1993, to Alchem, Incorporated for the continued operation
of the two (2) lagoon recycle system and the construction and operation of five (5) additional lagoons.
This permit shall void Permit No. WQ0002702 issued December 10, 1990 and shall be effective
from the date of issuance until December 31, 1994, 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 to you, you have
the right to request an adjudicatory hearing upon written request within 30 days following receipt of this
permit. This request must be in the form of a written petition, conforming to Chapter 150B of North
Carolina General Statutes, and filed with the Office of Administrative Hearings, P.O. Drawer 27447,
Raleigh, NC 27611-7447. Unless such demands are wade this permit shall be final and binding.
Regional Offices
Asheville Fayetteville Mooresville Raleigh Washington Wilmington Winston-Salem
704/251-6208 919/486-1541 704/663-1699 9191571-4700 919/946-6481 919/395-3900 919/896-7007
Pollution Prevention Pays
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone]
An Equal Opportunity Affirmative Action Employer

One set of approved plans and specifications is being forwarded to you. If you need additional
information concerning this matter, please contact Ms. Angela Y. Griffin at 919/ 733-5083.
Sincerely,
A. Presto oward, r., P.E.
Director
cc: Rowan County Health Department
Mooresville Regional Office, Water Quality Section
Mooresville Regional Office, Groundwater Section
,lack Floyd, Groundwater Section, Central Office
Salisbury Engineering & Planning
Facilities Assessment Unit
Training and Certificaton 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
Alchem, Incorporated
Rowan County
FOR THE
continued operation of two (2) lagoons each approximtely 50' W x 200' L x 10' D and the construction
and operation of five additional lagoons, four (4) 180' W x 155' L x 20' D and one (1) 210 W x 155' L x
20' D to serve Alchem, Incorporated with no discharge of wastes to the surface waters, pursuant to the
application received October 19, 1992 and in conformity with the project plan, specifications, and other
supporting data subsequently Bled and approved by the Department of Environment, Health and Natural
Resources and considered a part of this permit.
This permit shall void Permit No. WQ0002702 issued December 10, 1990 and shall be effective
from the date of issuance until December 31, 1994, 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. Upon completion of construction of the five lagoons 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. Mail the Certification to the Permits and Engineering Unit, P.O. Box
29535, Raleigh, NC 27626-0535.

6. In the event that the facilities fail to perform satisfactorily, including the creation of
nuisance conditions, the Perrittee 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.
7. The Mooresville 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. until5:00 p.m. on Monday through Friday,
excluding State Holidays.
8. 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
9. 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.
10. 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.
11. Diversion or bypassing of untreated wastewater from the treatment facilities is prohibited.
12. Freeboard in the lagoons shall not be less than two feet at any time.
13. 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.
14. Adequate inspection, maintenance, and cleaning shall be provided by the Permittee to
insure proper operation of the subject facilities.
15. 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.
16. 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.
17. 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).
18. 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.
2

19. 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.
20. A set of approved plans and specifications for the subject project must be retained by the
Permittee for the life of this project.
21. Noncompliance Notification:
The Permittee shall report by telephone to the Mooresville Regional Office, telephone
number [phone], 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 fine, 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.
22. 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 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 Title 15A, Chapter 8A, .0202
23, The recycle Iagoons shall not be located within 100 feet of water supply wells.
24. Prior to beginning waste disposal operations, three (3) monitor wells, one (1) upgradient
and two (2) downgradient, shall be installed to monitor groundwater quality. The well(s)
shall be constructed such that the water level in the well is never above or below the
screened (open) portion of the well at any time during the year. The exact location and
construction details for these wells shall be approved by the Mooresville Regional Office.
3

25. The monitoring wells shall be sampled initially after construction (and prior to waste
disposal operations) and thereafter every February and July for the following parameters:
TDS pH
SO4 Specific Conductivity
Aluminum Total Suspended Solids
Volatile Organic Compounds - In February only (by Method 1 or Method 2 below).
Method l: Method 6230D (Capillary - Column), "Standard Methods For The
Examination of Water and Wastewater", 1.7th ed., 1989.
Method 2: Method 502.2 "Methods For The Determination of Organic Compounds in
Drinking Water", U.S. EPA - 600/4-88/039.
The measurement of water level must be made prior to sampling for the remaining
parameters.
The measuring points (top of well casing) of all monitoring wells shall be surveyed to
provide relative elevations of the measuring point for each monitoring well. These
elevations shall be provided to the Regional Hydrogeologist within 60 days after well
construction. The depth of water in each well shall be measured from the surveyed point
on top of the casing.
If any volatile organic compounds are detected by method 6230D, or the equivalent method
502.2, then EPA methods 604 and 611 must also be run to detect other organic compounds
which may be present. The results of all analyses specified in the monitoring requirements,
including 604 and 611 if required, must be submitted simultaneously.
The results of the sampling and analysis shall be sent to the N.C. Division of
Environmental Management on Form GW-59 (Compliance Monitoring Report Form) every
March and August.
26. The CompliiInge Boundary for the disposal system is specified by regulations in 15A
NCAC 2L, Groundwater Classifications and Standards. An exceedance of Groundwater
Quality Standards beyond the Compliance Boundary is subject to the penalty provisions
applicable under General Statutel43-215.6(1)a. The sale of property, by the Permittee,
which is within or contiguous to thedisposal site, may alter the location of the Compliance
Boundary.
For facilities permitted on or after December 30, 1983, the Compliance Boundary is
established at the lesser of 250 feet from the storage lagoon, or 50 feet within the property
boundary.
If the title to any property which may affect the location of the Compliance Boundary is
changed, the Permittee shall notify the DEM Director within 14 days. The Director shall
then establish a modified Compliance Boundary which will be done as a modification to the
Permit.
4

The REVIEW BOUNDARY for the disposal system is specified by regulations in 15
NCAC 2L, Groundwater Classifications and Standards. A REVIEW BOUNDARY is
established around disposal systems midway between the Compliance Boundary and the
perimeter of the waste disposal area. When the concentration of any substance equals or
exceeds the maximum allowable concentration of that substance at the REVIEW
BOUNDARY, as determined by monitoring, the permittee shall §i h r (i) demonstrate,
through predictive calculations or modeling, that natural site conditions, facility design and
operational controls will prevent a violation of standards at the Compliance Boundary; or,
(ii) submit a plan for the alteration of existing site conditions, facility design or operational
controls that will prevent a violation of standards at the Compliance Boundary, and
implement that plan upon its approval by the Director.
27. The lagoon shall have a liner of natural material at least one (1) foot in thickness at all
locations with a hydraulic conductivity of no greater than 1 x 10-6 centimeters per second
when compacted. Following installation and inspection of the lagoon liner, and prior to
waste disposal operations, verification of the liner's compliance with hydraulic conductivity
and thickness specifications must be provided to the Division of Environmental
Management, Groundwater Section, by the project engineer.
28. All wells that are constructed for purposes of groundwater monitoring shall be constructed
in accordance with 15A NCAC 2C .0108 (Standards of Construction for Wells Other Than
Water Supply) and any other state and local laws and regulations pertaining to well
construction.
29. The Mooresville Regional Office, telephone number [phone] shall be notified at
least two weeks prior to the construction of any monitoring well so that an inspection can
be made of the monitoring well location. Such notification to the regional groundwater
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.
30. Within sixty (60) days of completion of all monitoring wells, the permittee shall submit two
original copies of a scaled topographic map (scale no greater than 1:24000) signed and
sealed by a professional engineer or a registered land surveyor that indicates all of the
following information:
a. the location and identity of each monitoring well,
b. the location of the waste disposal system,
C. the location of all property boundaries,
d. the laititude and longitude of each monitoring well,
e. the relative elevation of the top of the well casing (which shall be
known as the "measuring point")
f. and the depth of water below the measuring point at the time the measuring
point is established.
All monitoring well locations and elevations shall be surveyed by a registered land
surveyor.
31. Upon completion of all well construction activities, a certification must be received from a
professional engineer certifying that the monitoring wells are located and constructed in
accordance with the Well Construction Standards (15A NCAC 2C) and this permit. This
certification should be submitted with copies of the Well Completion Form (GW-1) for
each well. Mail certification and the associated GW-1 forms to the Permits and Compliance
Unit, Groundwater SEction, P.O Box 29535, Raleigh, N.C., 27626-0535.
5

3 2. For the initial sampling of the well as specified elsewhere in the permit, the permittee shall
submit a copy of the GW-1 form with the Compliance Monitoring Form (GW-59) for that
well. Compliance Monitoring Forms that do not include copies of the GW-1 form will be
returned to the initiation of enforcement activities pursuant to NC General Statutes 143-
215.6.
33. Any additional groundwater quality monitoring, as deemed necessary by the Division, shall
be provided.
34. 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 the 8th day of April, 1993
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
0-'J. , �G - " C a'p� /�
A. Preston loward, Jr., PIE., Director
Division of Vhvironmental Management
By Authority of the Environmental Management Commission
Permit No. WQ0002702 Amendment
M

Perrnit No. WQ0002702 Amendment
April 8, 1993
Engineer's Certification
I, , as a duly registered Professional Engineer in the State of North
Carolina, having been authorized to observe (periodically, weekly, full time) the construction of the
project, for the
Project Name
Location
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 the approved plans and specifications.
Signature
Date
7
Registration No.

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Person:
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Mailing Address:
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County: IZUv.rAt-5
Telephone:_ L-4
NPDES Permit No. NCflO >-\ )o\ Nondisc. Per.�-
IssueDate: TAA_10,
4C:6,ca
_Expiration Date:
Existing Facility
✓
New Facility
_ - Rated By: '4, C.pvso,-t
Date: \-L4
Reviewed (Train. &
Cert.)'
Reg. Office
Reviewed (Train. &
Geri.)
Central Office
ORC WA
Grade r\lA
Plant Class: (circle one) 1 11 III IV Total Points?
ITEM POINTS
(5) SECONDARY TREATMENT UNITS
(a) Carbonaceous Stage
(1)
Industrial Pretreatment Units and/or
(i)Aeration - high Purity Oxygen System .....
20
Industrial Pretreatment Program
Diffused Air System ...........
10
(see definition No. 33)
4
Mechanical Air System (fixed,
(2)
DE2Q FLOW OF PLANT IN GPD
floating or rotor) ..............
8
(not applicable to non-canlaminaled cooling waters, sludge
Separate Sludge Reaeration .....
3
handling facilities for water purification plants, totally
(if) Trickling Filler
closed cycle systems (del. No. 11). and facilities
High Rafe ...................
7
eonsiMing only of Item (4) (d) or Items (4) (d) and (11) (d))
Standard Rale ...............
5
0 - 20,000..........................
1
Packed Tower..........,....
5
20,001 — 50,000..........................
2
(iii) Biological Aerated Filter or Aerated
50,001 — 100,000 ..........................
3
Biological Filter ......................
10
10D,001 - 250,000 ....... . ..................
4
(iv) Aerated Lagoons ..................... .
10
250,001 — 500,000..........................
5
500,001--1,000,000 ..........................
a
(v) Rotating Biological Confaclors ..........
10
1,000,001 -- 2,000,000 ........................
10
2,000,001 (and up) - rate 1 point additional for each
(vi) Sand Filters•
200.000 gpd capacity up to a
intermittent biological .....
2
maximum of 30
recirculating biological .....
3
Design Flow (gpd)
(v`a) Stabilization Lagoons ...................
5
(3)
PRELIMINARY UNITS (see definition no. 32)
(viii)Clarifier ..............................
5
(a) Bar Screens............ ....................
1
(1x) Single stage system for combined
or
carbonaceous removal of BOD and
(b) Mechanical Screens, Static Screens or
nitrogenous removal by nitrification
Comminuting Devices ........... .............
2
(see def. No. 12) (Points for this item
(c) Gril Removal ...............................
1
have to be In addition to items (5) (a)
or
(ij through (5) (a) (viR .................
8
(d) Mechanical or Aerated Grit Removal ...........
2
(x) Nutrient additions to enhance DOD
(e) Blow Measuring Device .......................
1
fernoval ...............................
5
or
(xi) Biological Culture ('Super Bugs`) addition
(f) instrumented Flow Measurement ..............
2
to enhance organic compound removal .....
5
(g) Preaeralion................................
2
(b) Nitrogenous Stage
(i) Aeration - High Purity Oxygen System .....
20
(h) Influent Row -Equalization .................. _
2
Diffused Air System .....
1 0
t Grease or Oil Separators - Gravity
�) p Y - - • • • - • • • -
2
System (fixed.
Mechanical Air System (fixed,
Mechanical . _ ........
3
floating, oriolor) ...... ......
8
- Dissolved Air Flotation.
8
Separate Sludge Reaeral'son .....
3
�7 Prechlorination ..............................
5
(ii) Trickling Filter -
High Rafe ...........
7
(4)
PRIMARY TREATMENT UNrTS
Standard Rate ............
5
(a) Septic Tank (see definition no. 43) ..............
2
Packed Tower ............
5
(b) Imhofl Tank ..................................
5
(iii) Biological Aerated Filter or Aerated
(c) Primary Clarifiers ............................
5
Biological Filter .........................
10
(d) Settling Ponds or Se111ing Tanks for Inorganic
(iv) Rolaling Biological Contactors ............
10
Nontoxic Materials (sludge handling facilities
(v) Sand Fitter -
far water purification plants, sand, gravel,
intermittent biological ..... _ ..
2
stone, and other mining operations except
recirculating biological .. . . . .. .
3
recreational activities such as em or gold
g
2
(vi) Clarifier........ .......... . ......
5
mining) ......................................
J

(6) TERTi,ARY OR ADVANCED TREATMEN'>-.UNIT
(a) Activated Carbons Beds -
Athout carbon regeneration ........ . . ... s .... .
with carbon regeneration ... ....... .... .
(b) Powdered or Granular Activated Carbon Feed -
without carbon regeneration ................ .
with carbon regeneration ....................
t�J Air Stripping ............... . ...
(d) Denitrification Process (separate process) .... .
(e) Electrodiafysis ........ _ ....................
(f) Foam Separation .............................
(g) ton Exchange................................
(h) Land Application ofTreated Effluent
(see definition no. 22b) (not applicable for
sand, gravel, stone and other sunilar mining
operations)
(i) on agriailturaTly managed sites (See del.
r
No. a) . •...r
(ii) by high rate Infiltration on non -agriculturally
managed sites (includes rotary distributors
and similar fixed nozzle systems) ...........
(W) by subsurface disposal (includes low pressure
pipe systems and gravity systems except at
plants consisting of septic tank and nitrifica-
tion lines only) ...................... . . ... .
01 Microscleens..................................
(1) Phosphorus Remoial by Biological Processes
(See del. No. 26) .......................... • .
(k) Polishing Ponds - without atralion _ ..... .
with aeration .... _ .... .
(1) Post Aeration - cascade ......... . . .. .
diffused or mechanical .. .
(m) Reverse Osmosis .......................... . ... .
(n) Sand or Mixed -Media Fillers - low rate ...........
high rate ..........
(o) Treatment processes for removal of metal or
cyanide....................................
(p) Treatment processes for removal of toxic
rnalerials other than metal or cyanide .... _ ... .
It SLUDGE TREATMENT
(10) CHEMICAL ADDITION SYSTEM (S) (See definition No. 9)
5
{not applicable to chemical additions rated as item
1 5
(3) (s}. (5) (a) (xi). (6) (a). (6) (b), (7) (b). (7) (e}.
(9) (b), or (9) (c) 5 points each: List:
5
5
5
15
_ 5
5
5
10
5
(11) MISCELLANEOUS UNITS
5
(a) Holding Ponds, Holding Tanks or Settling Ponds
5
for Organic or Toxic Materials including wastes
from mining operations containing nitrogen and/or
phosphorous compounds In amounts significantly
greater than is common for domestic wastewater .......... 4
(b) Effluent Flow Equalization (not applicable to storage
basins which are inherent in land application systems). 2
10
(c) Stage Discharge (not applicable to storage basins
inherent in land application systems ... ........................... 5
(d) Pumps .........:.... 3
4
(e) Stand -By Power Supply __ ____ 3
'
(f) Thermal Pollution Control Device: . .............. ... ........ 3
4
5
2D
2
5
0
5
5
2
5
15
15
(a)
Sludge Digestion Tank - Heated ...............
10
Aerobic ...............
5
Unhealed .............
3
(b)
Sludge Stabilization (chemical or thermal) .......
5
(c)
Sludge Drying Beds - Gravity .................
2
Vacuum Assisted .......
5
(d)
Sludge EfuldaGan .............................
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) n .........
8
(h)
Sludge Gas Utilization (includinQ gas storage) ....
2
(i)
Sludge Holding Tank - Aerated ................
5
Non -aerated ............
2
(jj
Sludge Incinerator - (not including activated
carbon regeneration) .. _ ..
10
(k)
Vacuum Filler, Centrifuge or Filter Press or other
similar dewalering devices ....................
10
(8) SLUDGE DISPOSAL. (including incinerated ash)
(a) Lagoons ........................................
2
(b)
Land Application (surface and subsurface)
(see definition 22a)
wvhere 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 contractor who does
not hold the permit for the wastewater treatment
facility where the sludge is generated .........
10
(c)
Landfilled (burial) .............................
5
(9j DISINFECTION
(a)
Chlorination .............................
5
(b)
Dechlorination ........................
5
(c)
Ozone ..............................
5
(d)
Radiation ..........................
5
TOTAL POINTS Z
CLASStRCATION
Class 1- 5 - 25 Points
Class It. _ 26- 50 Points
Class Ill.......-........_.......51- 65 Points
Class IV.-----. _ 66- Up Points
Facilities having a rating of one through four points, Inclusive,
do not require a certified operator. Classification of all other
facilities requires a comparable grade operator In responsible
charge.
Facilities having an activated sludge process will be assigned
a minimum classification of Class 11.
Facilities having treatment processes for the removal of melat
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.