TRADE WASTE PLAN

Photo courtesy of Tourism Tropical North Queensland

CAIRNS REGIONAL COUNCIL TRADE WASTE PLAN

Document Information
VersionPrepared By

Issue for Review
and Date

2

Paul Bates
Colin Gabbert
Jacinta Ryan

TL Plumbing
Trade Waste Inspector
TL Quality & Reporting

Paul Bates

TL Plumbing

3

Issue
Date

Approval

Water and Waste
Management Team2020

#6391896

Water and Resource
Recovery Management
Team

2021

#6802277

Authorised By

Title

Trade Waste Plan

Controlled Distribution List

This document is uncontrolled when printed.
The electronic published version in DM is the only
controlled copy. 1

Synopsis:
This Trade Waste Plan has been developed to provide instructions to commercial and industrial
generators who discharge trade waste to Cairns Regional Council’s sewer infrastructure. The details
outlined in this plan are consistent with Council’s responsibilities and obligations under the Water
Supply (Safety & Reliability) Act 2008 and other relevant Queensland Legislation.
I certify that this Trade Waste Plan complies with the Water Supply (Safety and Reliability) Act
2008.

General Manager Approval:
Signature
Date 16 November 2021
Mark Wuth
General Manager – Water & Resource Recovery

1 All approved procedures must be published through DM to be considered controlled documents

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Table of ContentsDocument Information ............................................................................................................ 2
1.

INTRODUCTION .................................................................................................................. 6

2.

TRADE WASTE PLAN ....................................................................................................... 9
2.1

CONTROL OF TRADE WASTE ......................................................................................... 92.2

SUSPENSION OR CANCELLATION OF TRADE WASTE APPROVAL ..................... 9

2.3

PENALTIES AND RECOVERY OF COSTS ..................................................................... 9

3.

APPROVAL OF PRE-TREATMENT DEVICES ......................................................... 94.

SEWER ADMISSION LIMITS ....................................................................................... 10
4.1

EFFLUENT IMPROVEMENT PROGRAMS ................................................................... 10

5.

DISCHARGE CATEGORIES .......................................................................................... 11

6.

TRADE WASTE FEES AND CHARGES .................................................................... 11
6.1

TRADE WASTE CHARGES ............................................................................................ 11

6.1.1
CATEGORY 2 AND 3 DETERMINATION OF DISCHARGE QUANTITY ANDQUALITY ..................................................................................................................................... 11
6.1.2

GENERAL TRADE WASTE CHARGES ................................................................. 12

6.1.3

ADDITIONAL CHARGES FOR OVER LIMIT DISCHARGE ................................. 12

6.1.4

EQUIVALENT ARRESTOR CHARGES.................................................................. 13

6.1.5

CHARGES FOR FOOD WASTE DISPOSAL UNITS ............................................ 13

6.2

TRADE WASTE FEES ...................................................................................................... 13

6.2.1

APPLICATION/RENEWAL FEES ............................................................................ 13

6.2.2

REFUNDS OR TRANSFER ON CESSATION OF DISCHARGE ........................ 13

6.2.3

INSPECTION AND ANALYSIS FEES ..................................................................... 13

6.2.4

SEPTIC TANK AND OTHER REGULATED WASTE FEES ................................. 14

6.2.5

PENALTY CHARGES FOR NON-SERVICING OF ARRESTORS .................... 14

7.

APPLICATION PROCEDURES .................................................................................... 14

8.

APPROVALS AND AGREEMENTS ............................................................................ 15
8.1

APPROVALS ...................................................................................................................... 15

8.2

AGREEMENTS................................................................................................................... 159.

INSPECTION AND MONITORING ............................................................................. 16
9.1

10.

INSPECTION CHAMBERS AND/OR GAUGING FACILITY ........................................ 17
DETERMINATION OF DISCHARGE QUANTITY ................................................. 17

10.1

CATEGORY 1 AND 2......................................................................................................... 17

10.2

CATEGORY 3 ..................................................................................................................... 183#6368183 v3

CAIRNS REGIONAL COUNCIL TRADE WASTE PLAN
11.

DETERMINATION OF DISCHARGE QUALITY..................................................... 18

11.1

CATEGORY 1 AND 2......................................................................................................... 18

11.2

CATEGORY 3 ..................................................................................................................... 18

12.

SPECIFIC REQUIREMENTS FOR COMMERCIAL AND INDUSTRIAL

WASTES ............................................................................................................................................ 19
REMOVING REGULATED WASTE FROM PREMISES .............................................. 19

12.1
13.

ARRESTOR INSTALLATIONS AND REPLACEMENTS .................................... 20

13.1

GUIDE FOR DRAINS AND DISCHARGE PIPES CONVEYING TRADE WASTE .... 20

13.1.1 LIST OF DISCHARGERS WHEREIN TRADE WASTE PIPE OR OTHERAPPROVED MATERIALS WILL BE REQUIRED...................................................................... 20
13.1.2 LIST OF DISCHARGES WHEREIN TRADE WASTE PIPE OR OTHERAPPROVED MATERIAL WOULD BE OPTIONAL.................................................................... 20
13.2

GREASE ARRESTORS .................................................................................................... 21

13.3

INSTALLATION WITHIN BUILDINGS............................................................................. 23

13.4

COVER AND FRAME INSTALLATION ........................................................................... 23

13.5

GUIDELINES FOR SIZING GREASE ARRESTORS.................................................... 23

14.

MINERAL OIL ARRESTORS......................................................................................... 24

14.1
15.

PRE-TREATMENT REQUIREMENTS FOR MECHANICAL & AUTOMATIVE ......... 25
OTHER ARRESTOR APPLICATIONS ....................................................................... 26

15.1

PRE-TREATMENT REQUIREMENTS FOR OTHER TRADE WASTE GENERATOR
26

16.

BUNDING ............................................................................................................................. 28

17.

ENZYMES / BIOLOGICAL ADDITIVES .................................................................... 28

17.1

ENZYME AND BACTERIAL CULTURES ....................................................................... 28

17.2

GENETICALLY MODIFIED ORGANISMS (GMOS)...................................................... 28

18.

FOOD WASTE DIGESTERS (ANAEROBIC AND AEROBIC) ........................... 28

19.

FRUIT AND VEGETABLE PEELERS......................................................................... 29

20.

MACERATORS ................................................................................................................... 29

21.

FOOD WASTE DISPOSAL UNITS .............................................................................. 29

22.

SWIMMING POOLS / ORNAMENTAL PONDS ...................................................... 29

23.

MEDICAL, CLINICAL, VETERINARY AND INFECTIONS WASTES ........... 29

24.

CONTAINMENT OF TOXIC / HAZARDOUS SUBSTANCES ........................... 29

25.

DISCHARGE OF TRADE WASTES FROM VESSELS, VEHICLES AND

AIRCRAFT ........................................................................................................................................ 30
25.1

VESSELS .................................................................................................................... 30
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25.2

BUSES, AIRCRAFT, RECREATIONAL VEHICLES ............................................. 30

26.

LANDFILL LEACHATE & DISPOSAL FACILITY WASTEWATER ............. 30

27.

DISCHARGE FROM OPEN AREAS......................................................................... 30

28.

DENTAL FACILITIES................................................................................................... 31

29.

CAR WASH FACILITIES ............................................................................................. 31

30.

WORK PRACTICES ...................................................................................................... 31

31.

DISCRETIONARY POWER ........................................................................................ 31

32.

RECORDS AND REPORTS ........................................................................................ 31

32.1

IMPLEMENTATION RECORDS AND REPORTS ................................................. 31

APPENDIX A: RELEVANT LEGISLATION ............................................................................... 32
SCHEDULE 1: SEWER ADMISSION LIMITS ........................................................................... 33
SCHEDULE 2: PROHIBITED DISCHARGES ............................................................................ 36
SCHEDULE 3: SUBSTANCES NOT INCLUDED IN TABLES................................................... 37
SCHEDULE 4: DISCHARGE PERCENTAGES .......................................................................... 37

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1.

INTRODUCTION

PurposeThe purpose of this plan is to ensure the effective management of commercial and industrial tradewaste discharge to the Cairns Regional Council (CRC) sewerage infrastructure. The details outlinedin this plan will assist generators to apply best practice principles of trade waste treatment in amanner that safeguards public health, employee safety and the environment, consistent with
Council’s responsibilities and obligations under relevant Queensland Legislation.
Scope
This plan has been developed to provide information to business and industry on trade waste
management methodology and requirements. This plan is applicable across the CRC area.
References
See Appendix A for Relevant Legislation
Definitions
Agreement

See trade waste agreement
Arrestor / Interceptor

An apparatus designed to intercept and retain silt, sand, oil, grease, sludge and other substances in a
waste discharge.
Biosolids

Organic solids, derived from sewage treatment processes, appropriate for reuse.
CRC

In this plan, a reference to CRC means Cairns Regional Council Water and Resource Recovery
Department or any person appointed or to act on behalf of Cairns Regional Council Water andResource Recovery as the case may require.
Effluent

The liquid discharged following a wastewater treatment process.
Generator

See trade waste generator
Human wastes

Human faecal substances and urine.
Licensed Waste handler

Means a generator, transporter or receiver of regulated, trackable waste.
Lot—as defined in Planning Act 2016 Schedule 2
Lot means—(a) A lot under the Land Title Act; or(b) A separate, distinct parcel of land for which an interest is recorded in a register under the Land
Act; or(c) Common property for a community titles scheme under the Body Corporate and Community Act
1997; or(d) a lot or common property to which the Building Units and Group Titles Act 1980 continues toapply; or(e) A community or precinct thoroughfare under the Mixed Use Development Act 1993; or(f) A primary or secondary thoroughfare under the Integrated Resort Development Act 1987 or theSanctuary Cove Resort Act 1985.

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Occupier

As defined in the Local Government Act.
PermitSee trade waste permit.
PIN

Penalty infringement notices (PINs) are issued under the State Penalties Enforcement Act 1999 (Qld)(‘the SPE Act’) and impose “on-the-spot” fines. A PIN may only be issued for an offence that isprescribed as an infringement notice offence under the SPE Regulation.
Premises as defined in the Planning Act 2016 Schedule 2
premises means—(a) a building or other structure; or(b) land, whether or not a building or other structure is on the land.
Prohibited substances

A substance prescribed in Schedule 1 of the Water Supply (Safety and Reliability) Act 2008.
Regulated waste(1) Regulated waste is waste that is defined in the Environmental Protection Act 1994(a) Is commercial or industrial waste, whether or not it has been immobilised or treated; and(b) is of a type, or contains a constituent of a type, mentioned in schedule 7, part 1 of the EP Act
1994.
(2) Waste prescribed under subsection (1) includes—(a) For an element—any chemical compound containing the element; and(b) Anything that contains residues of the waste.
(3) However, waste is not regulated waste if it is mentioned in schedule 7, part 2 of the EP Act 1994.
Sewage – As defined in the Water Supply (Safety and Reliability) Act 2008 Schedule 3

Means household and commercial wastewater that contains, or may contain, faecal, urinary or otherhuman waste.
Sewerage or Sewerage System

Infrastructure used to receive, transport and treat sewage or effluent, and consisting of some or all of
the following:a) sewers;b) access chambers;c) vents;d) engines;e) pumps;f) structures;g) machinery;h) outfalls;i) Works not mentioned in (a) to (h).
Stormwater Drainage

Means infrastructure used to receive, store, transport or treat stormwater, and consisting of some or
all of the following(a) drains;(b) channels;(c) pipes;(d) chambers;(e) structures;(f) outfalls;(g) Works not mentioned in paragraphs (a) to (f).
Trade waste

The water-borne waste from business, trade or manufacturing premises, other than:(a) waste that is a prohibited substance; or(b) human waste; or7#6368183 v3

CAIRNS REGIONAL COUNCIL TRADE WASTE PLAN(c) Stormwater.
Trade waste agreement (Agreement)

Trade waste approval for the discharge of trade waste classified as Category 3. It states the terms
and conditions to be met by the approval holder with respect to the discharge of trade waste into
CRC’s sewerage system.
Trade waste approval (Approval)

Written approval by CRC for a person to discharge trade waste to CRC’s sewerage system. Tradewaste approval for the discharge of trade waste classified as Category 1 or 2. It states the terms andconditions to be met by the trade waste generator and the owner with respect to the discharge of
trade waste into CRC’s sewerage system.
Trade waste generator (Generator)

Any person, owner, occupier, company or body whose activity produces or has the potential toproduce trade waste.

Trade Waste Officer / Inspector

Trade waste Officer / Inspector means a person holding appointment as a trade waste Officer /Inspector of CRC.
Trade waste permit (Permit)

Equivalent term used for “trade waste approval” referenced in the previous Trade Waste
Environmental Plan versions and any associated documentation.

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2.

TRADE WASTE PLAN

2.1

CONTROL OF TRADE WASTE

A list of legislation relevant to trade waste control and acceptance to sewer is outlined in Appendix A.
Appendix A may not be a complete list of all legislation relating to the control of trade waste.
Any person requiring to discharge trade waste to sewerage must first apply for a trade waste approval(section 8).
A trade waste approval is the written approval from CRC that states the requirements and conditions
under which discharge to sewer is permitted. Two types of approvals are referred to in this plan – a
trade waste approval for Category 1 and 2 wastes and a trade waste agreement for Category 3
wastes.
It is an offence to discharge trade waste to the sewer unless a trade waste approval has been
issued by CRC, under the Water Supply (Safety and Reliability) Act 2008.
It is an offence for a person to discharge waste (including trade waste) other than uncontaminatedstorm water to storm water drainage (Local Government Act 2009).
2.2

SUSPENSION OR CANCELLATION OF TRADE WASTE APPROVAL

Grounds and procedures for suspension or cancellation of a trade waste approval are defined in
section 183 -184 of the Water Supply (Safety and Reliability) Act 2008.
Terms and conditions of a trade waste approval in respect to any matter occurring before thesuspension or cancellation, including the payment of charges owing, shall continue to have force andeffect after the suspension or cancellation of the trade waste approval.
2.3

PENALTIES AND RECOVERY OF COSTS

CRC may prosecute any person who commits a breach of the relevant Acts and Regulations, or who
refuses or neglects to comply with any direction or requirement by CRC pursuant to the relevant Acts
and Regulations. Penalties are set out in the appropriate Acts and Regulations and include
substantial fines.
CRC may recover repair costs from a person causing damage to the sewerage system by discharging
unauthorised material, making an unauthorised connection or interfering with infrastructure.

3.

APPROVAL OF PRE-TREATMENT DEVICES

All new to the market Pre-treatment Devices must have prior approval from CRC before installation iscarried out. Evidence must be provided to CRC with confirmation that three major Queensland
sewerage service providers have approved these devices within their jurisdiction.
This evidence must include three out of the four following service providers; Queensland Urban
Utilities, Unity Water, Gold Coast City Council and Logan City Council.
If any of these service providers suspends an approval, this suspension will apply to CRC. CRC will
not consider any products to be installed for testing purposes.
CRC accepts no responsibility for the efficiency or performance of the infrastructure. By approving thedevice in no way removes the responsibility for the structural integrity, plumbing compliance andeffective installation of the pre-treatment device from the manufacturer, the supplier and the installerof the pre-treatment device.

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This assessment does not include an engineering assessment of the structural integrity of the pretreatment device, its installation or compliance.

4.

SEWER ADMISSION LIMITS

Any waste discharged to CRC's sewer must comply with the Trade Waste Sewer Admission Limits as
set out in (Schedule 1) unless otherwise specified in the trade waste approval. These limits are
subject to periodic review.
The sewer admission limits, unless otherwise specified in the trade waste approval are absolute
maximums. CRC requires that trade waste generators implement waste minimisation practices andinstall best practice pre-treatment processes to reduce both the volume and the contaminant load ofwastes discharged to sewer.
The dilution of trade waste with water to achieve compliance with the sewer admission limits is
prohibited. CRC has obligations to avoid sewer overflows and consequently will impose limits on therate and timing of trade waste discharges.
4.1

EFFLUENT IMPROVEMENT PROGRAMSFor Category 1 and 2 waste, the installation of a properly sized, approved best practice pre-treatment
device, together with an acceptable maintenance program in accordance with the trade waste
approval conditions will, in most cases, be deemed to provide a satisfactory effluent with respect to
the General Limit Parameters (Schedule 1).
CRC may, at its discretion, negotiate with a trade waste generator to accept waste to sewerage thatexceeds the Sewer Admission Limit(s) for certain General Limit Parameter(s) (Schedule 1).
Additional charges (section 6) may apply for such parameters.
Where such an agreement is made, CRC may require the trade waste generator to undertake an
effluent improvement program. This program should include:
•
•
•
•
•
•
•

a description of the effluent quantity and quality;
provision for monitoring and reporting waste quantity and quality;
an examination of waste prevention and recycling options;an examination of options for the conservation of water;
A program involving the development of waste reduction and pre-treatment aimed at reducing
contaminant levels over a period of not more than three years to the prescribed admission limits;
An action program must be provided, including expected outcomes, timelines and milestones andA report to CRC, including a summary of achievements and options.

Trade waste generators will be advised in writing if CRC requires them to develop an effluent
improvement program. If, at the time the trade waste approval falls due for renewal, the holder of theapproval has not completed a satisfactory effluent improvement program, the approval holder isrequired to write to CRC requesting an extension of time with reasons.
CRC may issue a new trade waste approval, subject to conditions that:(a) a satisfactory effluent improvement program to be submitted within 14 days and(b) the trade waste approval may be varied after submission of the effluent improvement program asnecessary to enforce the implementation of the program.
CRC reserves the right to not grant a trade waste approval if a satisfactory effluent improvement
program is not received within the stipulated timeframe.

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5.

DISCHARGE CATEGORIESAll trade waste accepted to the sewer will be classified according to the following three categories forthe purposes of a trade waste approval and charging.
Parameter

Category 1
low strength/low volume< 600

Category 2
low strength / highvolume< 600

Category 3
high strength/ anyvolume>600

Biochemical Oxygen
Demand (BOD5), mg/L
Chemical Oxygen
Demand (COD), mg/L
Suspended Solids, mg/L
Total Kjeldahl Nitrogen,
mg/L N< 1200< 1200> 1200

< 600
< 150

< 600
< 150

> 600
> 150

Total Phosphorus, mg/L P
Volume, kL/annum
Trade waste approval
Charges< 50< 500
Approval
Annual Charge (seesection 6)

< 50
> 500
Approval
Quantity based
charge (see section
6)

> 50
Any
Agreement
Quantity/Quality
charge on total
annual load (seesection 6)

Minimum charge
applies

Table 1: Discharge Categories and Parameter Limits

Minimum charge
applies

Acceptance of trade waste under any category is conditional on the trade waste meeting CRC's
Sewer Admission Limits (Schedule 1) unless otherwise specified in the trade waste approval.
It is the responsibility of the trade waste generator to install, operate and maintain pre-treatment
devices and/or processes to ensure sewer admission limits as approved are not exceeded.
In the event of a significant change in the strength or volume of a waste approved under Category 1
or Category 2, the waste will be treated as a Category 3 waste for the purposes of charging andmonitoring.

6.

TRADE WASTE FEES AND CHARGES

Trade waste fees and charges are levied under Sections 97 (1) and 262 (3)(c) of the Local
Government Act 2009. Fees and Charges to be levied for the ensuing financial year will be
determined by CRC resolution passed before or at the same time as the Budget in any financial year.
6.1

TRADE WASTE CHARGES

Trade waste is divided into three categories for charging purposes (section 5). Charges cover thecost of treatment and recurring administration and overhead costs associated with trade waste
control.
Trade Waste Accounts for discharge to sewer will bea) Charged an Approval fee with an annual renewal fee;b) for category 2 and category 3, volume charges billed four (4) monthly;c) a debt due by the generator; and/ord) recoverable as per Council’s Debt Recovery Processes.
6.1.1

CATEGORY 2 AND 3 DETERMINATION OF DISCHARGE QUANTITY AND QUALITY

In the absence of an approved trade waste discharge meter or water meter installed specifically tomeasure the town water inflow for the trade waste activity, the volume of trade waste discharged shallbe estimated from total metered water consumption, less an allowance for domestic waste based on

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136kL per annum per pedestal. An allowance for water consumed on the property will be determinedbased on a discharge percentage.
Investigations have established a basis for estimating the proportion of water consumption discharged
as trade waste by various types of trade and manufacturing processes. These will form the basis of
the initial percentage applied when an approval is issued. Where there is no percentage available,
100 percent discharge will be assumed (Schedule 4).
Where individual trade waste generators have information that would indicate a departure from thesebases, application may be made for reconsideration of the percentage used. Council will consider the
installation water meters installed specifically to measure the town water inflow for the trade waste
activity if the generator identifies this installation will give a more accurate capture of the trade waste
discharge.
High volume Category 2 trade waste generators may, and are encouraged to, install an approved flow
measurement device to be calibrated as specified in the Approval conditions.
6.1.2

GENERAL TRADE WASTE CHARGES

Charges are based on the actual quality and quantity of discharge for the period.
Charges will be determined as follows:
Category 1, 2 and 3:•

An annual non-refundable and non-transferable, flat charge to cover the cost of treatment,
recurring administration, inspections and overhead costs associated with trade waste control shallapply.

Category 2 and 3:•

Where the water consumed for the property exceeds 1.36 kilolitres per day a quantity charge shallapply.

•

A quantity and quality charge on the total annual discharge of trade waste to the sewer to be
calculated as follows:
C = Qa + Qx1n1/1000 + Qx2n2 /1000 + ……... where
C is the total annual charge ($),
Q is the total annual discharge volume (kL),a is the unit charge for volume ($/kL),
x1, x2 are the average concentrations of pollutants N1, N2 (mg/L),
n1, n2 are the unit charges for pollutants N1, N2 ($/kg),
N1, N2 are the pollutants to be charged for.

•

Charges shall be made for BOD5 (or alternatively COD) and suspended solids, oil and grease,
TKN (Total Kjeldahl Nitrogen), TP (Total Phosphorus) and sulphates.

6.1.3

ADDITIONAL CHARGES FOR OVER LIMIT DISCHARGEThis charge applies:a) Where CRC agrees to accept to sewerage waste which has properties in excess of those definedin the General Limits (Schedule 1) of the Sewer Admission Limits and these conditions ofacceptance are defined in the trade waste approval.
b) Where a trade waste generator continually discharges trade waste to sewer in excess of the limits
defined in the trade waste approval or the Sewer Admission Limits (Schedule 1) without approval
to exceed the limits.

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This charge shall apply to each non-complying parameter in addition to the general charges under
section 6.
The formula for calculation is:
Charge = (actual/approved)d × charge rate ($/kg) × kg pollutant whered is a constant to be determined by CRC;
the minimum ratio for (actual/approved) is 1.0; andapproved means the sewer admission limit value or other negotiated value defined in the
trade waste approval.
The period of the charge will be the time period, based on the sampling frequency, over which thelimits are considered by CRC to have been exceeded.
6.1.4

EQUIVALENT ARRESTOR CHARGES

This charge applies where an existing waste stream requires the installation of an arrestor to provide
best practice pre-treatment for Category 1 or Category 2 wastes, but site-specific conditions do notallow for appropriate devices to be installed.
In addition to the normal Category 1 or Category 2 charges, a charge equal to the average cost paidby other trade waste generators of similar waste type and quantity, to have arrestors installed andregularly cleaned, will apply.
6.1.5

CHARGES FOR FOOD WASTE DISPOSAL UNITS

Trade waste generators in Categories 1 and 2 with food waste disposal units (garbage grinders, fruitand vegetable peelers) shall be charged a fee based on the power of the motor. This charge will
apply in addition to general charges.
Rated Power, Watts• Category A – To 700 watts rating• Category B – Above 700 watts rating• Category C – Garbage grinders in public and private hospitals and aged persons
homes
The fees and charges for the current financial year are listed on the CRC website.
6.2

TRADE WASTE FEES

6.2.1

APPLICATION/RENEWAL FEES

Applications for approval to discharge trade waste must be accompanied by the prescribed
application fee.
Fees are due annually and is a prescribed fee as defined by CRC.
These fees and charges can be found on CRC’s website.
6.2.2

REFUNDS OR TRANSFER ON CESSATION OF DISCHARGE

No refunds nor transfer of approval will be allowed on cessation of discharge or sale of the business.
6.2.3

INSPECTION AND ANALYSIS FEES

The trade waste charges in all categories allow for routine inspections and quality compliance /auditing analyses by CRC. Where additional inspections and laboratory analyses are required
because of non-compliance with trade waste approval conditions, full costs will be recovered from theholder of the approval.

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The cost of inspection shall be based on full cost recovery. The full cost of any laboratory analyses
shall be recovered.
6.2.4

SEPTIC TANK AND OTHER REGULATED WASTE FEES

Licensed waste handler and other persons disposing of septic tank, portable toilet or other approved
regulated waste to the sewer or sewage treatment plant under approved conditions shall be charged
on a calculated volume basis ($/kL) which takes into account both the volume and concentration of
the regulated waste.
These fees and charges can be found on the CRC website.
6.2.5

PENALTY CHARGES FOR NON-SERVICING OF ARRESTORS

Penalty charges based on equivalent arrestor charges may be applied in the instance of non-servicing
of arrestors or failing to comply with the servicing requirements in the conditions of the Trade Waste
Approval.

7.

APPLICATION PROCEDURES

Any person wishing to discharge trade waste to sewer must make written application for an approval
to discharge. Applicants should contact CRC’s Trade Waste Section for advice on the type of
application required and the procedures for obtaining approval.
Applications should be lodged prior to commencement of trading. Examples of appropriate times for
lodging applications may include:• during the processing of a plumbing application for new premises or extensions intended forindustrial and/or commercial usage;• change in tenancy of such premises;• change of ownership of such premises;• shop fit-outs of such premises;• during the processing of an application to strata title such premises;• existing premises where trade waste is generated, and no trade waste approval has been issued;or• Where a change in process technology occurs.
Trade waste disposal contractors wishing to discharge septic tank, portable toilet waste or otherapproved regulated waste to the sewer or sewage treatment plant must be licensed and must apply
for an approval.
How to apply for a Trade Waste Approval:
An application can be made by completing an online form that can be found on the
CRC Online Self Service www.cairns.qld.gov.au/online/OSS (preferred method).
Alternatively, CRC’s main Customer Service Centre is located at 119-145 Spence Street, Cairns andis open from 8:30am to 4:30pm Monday to Friday.
PO Box 359, Cairns QLD 4870

1300 69 22 47

pladmin@cairns.qld.gov.au



www.cairns.qld.gov.au

Failure to provide all required information will result in delays in approvals.

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Applications for approval to discharge must be accompanied by the application fee.
Any plumbing and drainage work associated with installing any treatment process shall be inaccordance with the Plumbing and Drainage Act 2018, and the approved sewerage drainage plan. It
must be carried out by a licensed plumber and drainer.
Specific problem industries will be required to employ the services of a Trade Waste Consultant toreport on the type, volume and concentrations of trade waste being discharged and the method thatwill be adopted to ensure CRC’s sewer admission limits are met.
Where a waste is deemed to be non-sewerable, an approval will not be issued and alternative
arrangements for disposal of wastes will have to be made. General advice on treatment and disposal
options for non-sewerable waste may be obtained from CRC; however, detailed advice should besought from appropriately qualified private consultants.

8.

APPROVALS AND AGREEMENTS

8.1

APPROVALS

A generator producing trade waste assessed as suitable for sewer discharge and classified as
Category 1 or Category 2 may be issued with a written trade waste approval which shall remain inforce for the specified period unless cancelled sooner.
Should more than one trade waste generator exist on a property, then a separate trade waste
approval is required for each generator.
Trade waste approvals are neither transferable nor refundable.
The approval states the terms and conditions the holder of the approval must observe to discharge
trade waste to CRC's sewer infrastructure. These include, but are not limited to:
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
8.2

expiry/renewal date (to be renewed annually);
the location of the premises and nature of the occupancy;
the type and composition of trade waste that may be discharged
a statement that the quality of waste shall comply with CRC’s sewer admission limits as specified
in Schedule 1 of this Plan (or attached to the approval) and details of any allowed variations;the quantity of trade waste that may be discharged;
the rate of discharge, including maximum rate of discharge;
the time when trade waste may be discharged;
the period for which trade waste may be discharged;
the method for estimating or measuring discharge volume;
provisions for measuring and sampling discharge prior to entry to sewer;
details of any pre-treatment required;conditions for maintenance of, and removal of waste from, pre-treatment equipment including thefrequency of cleaning and waste transporter to be used;records to be kept concerning the cleaning and maintenance of pre-treatment equipment;a statement that trade waste charges and fees apply and shall be paid in accordance with section
6 of this plan andany other conditions considered by CRC to be appropriate.
AGREEMENTS

A trade waste generator producing waste that has been assessed as suitable for sewer discharge andclassified as Category 3 may be issued with a written trade waste approval in the form of a tradewaste agreement. The agreement shall remain in force for the specified period unless cancelledsooner.

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Trade waste agreements are neither transferable nor refundable.
The agreement states the terms and conditions the holder of the agreement must observe todischarge trade waste to CRC's sewerage. These include but are not limited to:
•
•
•
•
•
•
•
•
•

•
•
•
•
•
•
•
•
•

9.

expiry/renewal date;
the location of the premises and nature of the occupancy;
quality of waste that may be discharged;
a statement that the quality of waste shall comply with CRC’s sewer admission limits as specified
in Schedule 1 of this Plan (or attached to the agreement) and details of any allowed variations;quantity of waste that may be discharged;
rate of discharge - maximum instantaneous, maximum daily;
hours of day, days of week discharge is allowed;
requirements for/details of effluent improvement program;details of self-regulation monitoring program including
 sampling point frequency of sampling method of sample collection and type of sample to be collected analyses required methods of analyses
 laboratory to be used
 data transfer and availability to CRC;
type, design and location of flow measuring equipment and requirements for calibration;
methods to be used for estimation of data lost due to failure of sampling program or flow
measurement instrumentation;
provision for measurement and sampling of discharge prior to entry to sewer;
pre-treatment processes to be used;conditions for maintenance of, and removal of waste from, pre-treatment equipment including thefrequency of cleaning, waste transporter to be used;records to be kept concerning the cleaning and maintenance of pre-treatment equipment anddisposal of waste;
the obligation of the trade waste generator concerning any variations to operation or treatment
processes that may affect discharge quantity or quality including change of business type;a statement that trade waste charges and fees apply and shall be paid in accordance with section
6 of this plan andAny other conditions relevant to the discharges as agreed.

INSPECTION AND MONITORING

For the purpose of monitoring and auditing the conditions of discharge, CRC shall routinely andrandomly inspect all premises occupied by the holder of a trade waste approval.
Inspections may include, but not be limited to, the following:• Check of all chemical storage areas to ensure that they are properly bunded and are not
improperly connected to sewer.
• Checks to ensure that there are no illegal stormwater connections to the trade waste system orsewerage.
• Check to ensure that there are no illegal trade waste connections to storm water or sewer and that
there is no potential for trade waste to overflow improperly to sewer, stormwater or waterways.
• Check to ensure that prohibited substances have been removed by a licenced waste handler andnot discharged directly nor indirectly to CRC sewer, stormwater or waterways.
• Checks to ensure that pre-treatment facilities are regularly and properly serviced and standby
equipment is available where necessary.
• Monitoring of strength and flow is undertaken as required under the trade waste approval.
• Assessment of work practices to ensure that they do not result in a breach of the trade waste
approval or legislation.

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• Accessibility to the trade waste facility is maintained for inspection purposes taking into
consideration any workplace health and safety requirements.
9.1

INSPECTION CHAMBERS AND/OR GAUGING FACILITY

Category 3 waste shall be discharged to CRC's sewerage system through a suitable inspection
chamber and/or gauging facility. The inspection chamber and/or gauging facility shall be located on
the trade waste discharge line in an area accessible at all times to CRC's inspector’s, allowing forsampling and/or monitoring equipment to be installed and operated.
A suitable 240-volt power outlet and a standard water supply outlet with back-flow prevention device
installed in accordance with AS 3500 Part 1 and approved by CRC is required at all gauging facilitysites.
For new Category 2 and 3 installations, the trade waste discharge line shall be separate from thedomestic waste discharge line. For existing installations retrofitting is not required except where it
may be done during any proposed upgrading or alterations to the installation.
If any commercial, business or industrial premises generates trade waste but does not discharge
trade waste to CRC's sewerage system, a suitable inspection point shall be installed on the sanitarydrain. It shall be in an accessible location within the property boundary and before connecting into the
CRC sewer. This is to enable checks to be made to ensure that trade waste is not being discharged
to sewer.
Arrestors and other pre-treatment devices that are installed and are discharging Category 1 and 2
trade waste shall have an inspection opening provided externally to the building and within thepremise’s boundary, at finished ground level.
Internal grease arrestor inspection outlets are to be raised to the finished surface level.

10.

DETERMINATION OF DISCHARGE QUANTITY

10.1

CATEGORY 1 AND 2

In the absence of an approved trade waste discharge meter or water meter installed specifically tomeasure the town water inflow for the trade waste activity the volume of trade waste discharged shallbe estimated from total metered water consumption, less an allowance for domestic waste based on
136kL per annum per pedestal and an allowance for water consumed on the property, based on adischarge percentage.
Investigations have established a basis for estimating the proportion of water consumption discharged
as trade waste by various types of trade and manufacturing processes. These will form the basis of
the initial percentage applied when an approval is issued. Where there is no percentage available,
100 percent discharge will be assumed (Schedule 4).
Where individual trade waste generators have information that would indicate a departure from thesebases, application may be made for reconsideration of the percentage used. Council will consider the
installation of water meters installed specifically to measure the town water inflow for the trade waste
activity if the generator identifies this installation will give a more accurate capture of the trade waste
discharge.
High volume Category 2 trade waste generators may, and are encouraged to, install an approved flow
measurement device to be calibrated as specified in the Approval conditions.

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10.2

CATEGORY 3

The volume of trade waste discharged to the sewer shall be measured by an approved flow
measurement device calibrated as specified in the agreement. This should be located on the tradewaste discharge stream, which should be separate from the domestic waste discharge stream.
Where the flow measured includes domestic waste, an allowance of 136 kL/annum per pedestal shallbe made.
Trade waste generators exempt from installing a flow measurement device shall have the volume ofdischarge estimated as under section 11.2.

11.

DETERMINATION OF DISCHARGE QUALITY

11.1

CATEGORY 1 AND 2

Quality measurements for Category 1 and 2 discharges are required for compliance checks only.
This shall be done by CRC as part of the inspection and monitoring program. The cost shall becovered by the annual trade waste charge, except where additional inspection and testing is required
because of non-compliance, where CRC shall charge the holder of the approval the prescribed fee as
set out in the fees and charges.
Category 1-

Low strength/low volume dischargers
BOD5 and suspended solids less than 600 mg/L
and/or COD less than 1200 mg/L
Volume less than 500 kL/annum

Approval to discharge required – Trade Waste Approval
Charge – Flat fee
Category 2-

Low strength/high volume dischargers
BOD5 and suspended solids less than 600 mg/L
and/or COD less than 1200 mg/L
Volume greater than 500 kL/annum

Approval to discharge required – Trade Waste Approval
Charge – Quantity charge on total tri-annual flow (4 monthly). Minimum fee applies.
11.2

CATEGORY 3

Quality measurements are required for both charging and compliance purposes.
For charging purposes, a system of self-monitoring by the trade waste generator shall be used tocollect sufficient data to enable the mass load for the designated charging period to be calculated.
Where pre-treatment is required to meet sewer admission limits for specified parameters, selfmonitoring will be required for those parameters, or a suitable surrogate, to confirm satisfactory pretreatment.
Requirements for self-monitoring and auditing by CRC shall be specified in the agreement.
The holder of the agreement shall meet all costs of self-monitoring.
CRC shall inspect the premises and collect and analyse samples for overall assessment ofcompliance with sewer admission limits and agreement conditions as part of its inspection andmonitoring program. The cost is covered by the annual trade waste charge.
Where additional inspection and testing is required to be done by CRC as a result of non-compliance,
CRC shall charge the holder of the agreement the prescribed fee as set out in the fees and charges.

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Category 3-

High strength dischargers
BOD5 and suspended solids greater than 600 mg/L
and/or COD greater than 1200 mg/L
Volume – any

Approval to discharge required – agreement between Council and both the owner (or Authorised
Agent) and the trade waste generator when the owner is not the Generator.
Charge – Quantity and Quality charges on total annual load. Minimum fee applies.

12.

SPECIFIC REQUIREMENTS FOR COMMERCIAL AND INDUSTRIAL
WASTES

12.1

REMOVING REGULATED WASTE FROM PREMISES

Removing regulated waste from a premise shall only be carried out by waste handler licensed inaccordance with the Environmental Protection Act 1994 and the Environmental Protection Regulation
1998 and transported, stored, treated or disposed of in accordance with the requirements of theEnvironmental Protection Regulation 1998.
No person shall discharge or cause to be discharged directly or indirectly to sewerage, wastes fromany waste handler tanker without a trade waste approval.
Removing and disposing of septic tank waste, portable toilet waste and other approved regulated
liquid waste shall only be done by a licensed waste handler. Such waste may be disposed of into thesewerage system in accordance with approval conditions.
Waste from grease and oil arrestors, other than treated effluent from approved installation, shall not
be disposed of into the sewerage system. Such wastes shall be disposed of in a manner and/or at asite approved in accordance with requirements of the Environmental Protection Act 1994 and theEnvironmental Protection Regulation 1998.
All waste handlers shall be required to maintain records as prescribed by CRC to account for all
waste collected and disposed of within or outside CRC’s local government area from pre-treatment
facilities.
Copies of the collection records are to be forwarded to CRC trade waste unit within 5 days ofcollecting trade waste and/or regulated waste from the generator.
Trade waste charges in accordance with Section 6.2 and schedule 1 of this Plan, will apply to alltransported regulated waste that is approved for discharge to sewerage.
Advice on the disposal of trade waste and regulated waste not suitable for discharge to sewer may beobtained from:
CRC’s main Customer Service Centre is located at 119-145 Spence Street, Cairns and is open from
8:30am to 4:30pm Monday to Friday.
PO Box 359, Cairns QLD 4870

1300 69 22 47

pladmin@cairns.qld.gov.au



www.cairns.qld.gov.au

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13.

ARRESTOR INSTALLATIONS AND REPLACEMENTS

Where arrestor installations are required to pre-treat waste before discharge to sewer they must be ofa design and capacity approved by CRC.
A Plumbing Form 1 and associated plans must be submitted to CRC prior to any commencement ofany plumbing and drainage work associated with the installation of trade waste equipment.
All work must be performed by a licenced Plumber/Drainer.
A hose cock for the purpose of cleaning and maintenance of trade waste equipment, connected to ahigh hazard backflow prevention device shall be installed in accordance with AS3500 part 1.
13.1

GUIDE FOR DRAINS AND DISCHARGE PIPES CONVEYING TRADE WASTE

13.1.1 LIST OF DISCHARGERS WHEREIN TRADE WASTE PIPE OR OTHER APPROVED
MATERIALS WILL BE REQUIRED
Laundries – commercial and hospital
Mechanical parts washing – solvents
Hospitals – sterilisers, autoclaves, laboratories
Printing works
Tanneries
Food processing
Anodising plants
BakerySmallgoods manufacture
Restaurant
Boning rooms
Fish and chip shop
Paint manufacture
Take away food shop
Boiler blow down from industrial premises
Car wash
Poultry abattoir
Retail butchery and abattoir
Any business that produces high temperatures
Margarine and butter manufacture
Breweries
and/or chemical discharge
13.1.2 LIST OF DISCHARGES WHEREIN TRADE WASTE PIPE OR OTHER APPROVED
MATERIAL WOULD BE OPTIONAL

1.
2.
3.
4.

Coffee shop (no food preparation)
Milk bar
Garbage compaction areas
Hair dressing and nail salons

13.1.3 GENERAL PRE-TREATMENT REQUIREMENTS FOOD INDUSTRY
Generator/Source

Characteristics of
Waste
Flour products,
greaseGrease/oil

General Treatment Requirements

Brewery

Suspended Solids,
Chemicals, Trub,grain

Butcher, small, retail

Grease (washingfloors and utensils)
FFOG

See notes below 1
Sub-metering
Grated floor drains with strainers
Interceptor treatment system to be sized inrelation to brewing discharge limits
See notes below 1 & 2

Bakery-Hot bread, pies cakes,
pastries
BistroCanteen/cafeteria (with hot foodpreparation)
Caterer
Chicken (fresh), retail, meat
cutting and preparation

See notes below 1 & 2
See notes below 1 & 2

See notes below 1 & 2

FFOG

See notes below 1 & 2

FFOG

See notes below 1 & 2

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Generator/Source

Characteristics of
Waste
FFOG

General Treatment Requirements

FFOG

See notes below 1 & 4

Community halls (foodpreparation)
Fish (fresh)- no cooking
Fish shop retail and cooking onsite
Hospital kitchen/ Laundries

Food and Solids

See notes below 1 & 2

Scales, fish gut

See notes below 1 & 2

Scales, grease

See notes below 1 & 2Grease/solids
Lint
Temperature

Hotel with counterlunches/restaurants

FFOG

Ice Cream Parlour

Milk productIn-floor and in sink dry basket arrestors (1) infood preparation and wash-up areas; greasearrestor, capacity to cool hot discharge waterto less than 38C.
See note below 1 & 4
Lint and cooling pits
In-floor and in sink dry basket arrestors (1) infood preparation and wash-up areas; greasearrestor Glass washers in bars to by-passgrease arrestors.
See note below 1 & 4
No pre-treatment required. Direct to sewer

Ice cream parlour – with hot
food, take-away
Large take-away food outlets
eg: McDonald’s, Hungry Jack’s
Pizza Hut, Kentucky Fried
Chicken, BBQ and Charcoal
Chicken, (Convotherm-ovens),rotisseries etc
Motel with kitchens/restaurants

Dairy, FFOG

See notes below 1 & 2

FFOG

See notes below 1 & 4

FFOG

See notes below 1 & 4

Nursing homes kitchen/ laundry

Grease/solids
Lint
Temperature
FFOG

See notes below 1 & 2
Lint and cooling pits

Sandwich bar with hot foodtake-away
Sandwich/coffee shop - nofoods prepared
Shopping centres–preparation

FFOG

See notes below 1 & 2

SolidsSubject to condition. No cooking.

FFOG and solids

See notes below 1 & 4

Supermarkets – incorporating
butcher and/or bakery
Take-away food outlets

FFOG and flour

See notes below 1 & 4

FFOG, Solids

See notes below 1 & 2

Coffee shop, hot food preparedand served
Commercial kitchen

Restaurant

See notes below 1 & 2

See notes below 1 & 2

Table 2: General Pre-Treatment Requirements Food Industry

NOTES:
1. Bucket trap with removable strainer for cleaning, fixed secondary strainer or self-closing or
self-sealing valve for in floor and in all sinks.
2. Grease Arrestor required minimum size 1000L
3. FFOG is Foods, fats, oils and grease
4. Grease Arrestor required minimum size 2000L
13.2

GREASE ARRESTORS

Section 13, Tables 2 and 3 outline the method for estimating the size of grease arrestors. The CRC
Trade Waste Officer/ Inspector will approve the final adequate capacity.

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The minimum required grease arrestor to be installed is 1000L unless approved by CRC under
special circumstances.
The maximum capacity of an individual grease arrestor shall be 3000L. Where the capacity of agrease arrestor is greater than 3000L, additional arrestors shall be used. For each separate arrestor
that is installed the waste stream must be defined.
In certain circumstances CRC may approve the installation of an arrester in excess of a 3000L
capacity. Applications must include all details relating to loadings and accompanied with detailedplans and specifications of the proposed device.
Where it is intended that several trade waste generators share the use of a grease arrestor, thefollowing information is required to be clearly tabled on the plan submitted with the application for
approval:•••

the size of the arrestor;
details of the loading to be discharged by each trade waste generator;
the names of the businesses and shop number(s) sharing the arrestor.

Grease arrestors must be appropriately located to allow access for inspection, pump out andcleaning. The location must be approved by CRC prior to installation.
For the purpose of odour control all grease arrestors shall be fitted with full length and width opening,gas tight metal covers and frames.
The outlet of all arrestor installations must discharge to a disconnector gully to allow for inspection
and sampling.
Grease arrestors shall be vented with a minimum of 100mm diameter vent. The grease arrestors
vents are not permitted to be interconnected.
A remote washout line shall be installed on grease arrestors that require a riser of 900mm or morewhen the opening is not the full size of the arrestor.
When a remote pump out line is required, the maximum distance shall not exceed 30 metres inlength. The pressure pipe is to be a minimum of 80mm diameter and fitted with cast alloy or stainlesssteel Female Camlock at the vacuum truck connection end and Male Camlock at the grease arrestor.
The use of solvents, enzymes, mutant or natural bacterial cultures, odour control agents or pesticides
in grease arrestors is prohibited unless specifically approved by CRC.
Conditional approval may be given to allow the trade waste generator to demonstrate to CRC that the
product to be used does not adversely impact on the sewerage system or the environment.
Maintenance and cleaning of grease arrestors shall be carried out on a regular basis in accordancewith conditions of the trade waste approval by a licenced waste handler.
In a situation where a grease arrestor is required for pre-treatment but cannot be installed because of
specific site constraints an equivalent arrestor charge (section 6) will apply.
All final decisions on the size of grease arrestors will be made by CRC.
Grease converters and grease removal systems will not be accepted as a primary source ofpre-treatment but may be installed upstream of a grease arrestor to assist in the removal ofgrease and cooking oils.

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13.3

INSTALLATION WITHIN BUILDINGSGrease Arrestors installed inside buildings are not normally permitted, except in exceptional
circumstances, and only with the approval of CRC Trade Waste Officers and Environmental Health
Officers. The arrestor must be fitted with gas tight lids and to be of a suitable design for remote pump
out.
13.4

COVER AND FRAME INSTALLATIONThe cast iron grease arrestor frame shall be jointed to the thickening rib and/or wall extension of thegrease arrestor with industrial Epoxy or similar Council approved material. The ‘in situ’ concretesurround around the frame shall be at least 200 mm wide and extend below the angle of the
thickening rib of the grease arrestor.
13.5

GUIDELINES FOR SIZING GREASE ARRESTORSThe capacity of a grease arrestor may be calculated from the following capacity allowances forvarious fixtures and fittings in commercial premises. Minimum sizes apply to certain activities refer to
Section 13, Table 3.
How to calculate your peak hourly flow
1. Determine the fixtures/fittings that will feed into your grease arrestor and how many of each.
2. Add together the flow ratings – this will be in litres.
3. The total amount will be the minimum sized grease arrestor needed to satisfy the one-hour
retention requirement.
4. Choose a grease arrestor with a capacity equal to or more than your estimated peak hourly
flow.
Fixture/Fitting
Bain Marie
Basin - hand
Bowl – Mixing- small – 350 diameter- large
Combi Oven
Dishwasher- small (bench)- medium (upright)- large (2 outlets) Conveyor
Floor Waste
Grease canopy
Glass washers (not in liquor sales
area)
KettleNoodle / paster cooker
Sink– cleaners– domestic– commercial Kitchen single– commercial Kitchen double or pot– lab – education facility– lab – commercial or research
Steamer cooker/kettle
Steamer/hydrotherm/boiling pots/stockpots

Peak flow allowance(L/hr)
50
50
200
100
200
150

Quantity

Total (L/hr)

400
800
1200
50
50
200
200
140
50
50
75
150
30
50
200
100

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Fixture/Fitting
Steam Roasting Convection Ovens(Convotherm-ovens)- 10 or less trays->10 but <20 trays- >20 trays
Tundish – condensate(refrigerator/freezer)
Water heated bain-marie
Wok burner
TOTAL for Grease Arrestor volume

Peak flow allowance(L/hr)
400

Quantity

Total (L/hr)

800
1200
3
50
200

Table 3: Guidelines for Sizing Grease Arrestors

If the generators business does not have fixtures or appliances in excess of 550L, then the minimum
grease arrestor shall apply.

14.

MINERAL OIL ARRESTORSCRC will not accept in-ground, triple chamber type oil arrestors for oil and grease separation.
Current in-ground triple interceptor for use as an oil and grease separation will require an
improvement/upgrade within 3 years of being identified upon trade waste inspection.
Appropriately sized mineral (petroleum) oil arrestors for the treatment of oily wastewater will beapproved in most circumstances. Acceptable methods include:
•
•
•
•
•
•
•

coalescing plate separators;
vertical gravity separators;
membrane technology;
dissolved air flotation (DAF);
chemical precipitation;hydrocyclones; andother approved apparatus /methods.

Each application will be assessed on the nature of the oily waste to be treated. The proposed
treatment method and site location will be advised.
Only CRC approved equipment is to be installed on the premises and must comply with the relevant
Queensland Legislation.
Holding tanks are to be of minimum size 1000L installed before the pre-treatment system. They are to
be fitted with a high-level alarm system with strobe light and audible alarm.
Only non-emulsifying pumps, such as an electrically driven diaphragm pump (at less than 40 cycles
per minute) may be used to pump the wastewater to a separator.
Pump discharge must not be greater than the capacity of the separator.
Any person wishing to sell an Oil Separator System, which includes the pump for treatment ofwastewater going to sewer, must conform to these guidelines.
Hand wash basins and troughs in workshops are to discharge to the separation treatment system andnot directly or indirectly to CRC sewer infrastructure.
The connection of these fixtures to the separation system does not imply that they are suitable asparts washing facilities.

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Only “Quick Break” detergents and degreasers may be used in mineral oil separators.
Maintenance cleaning of mineral oil arrestors shall be carried out on a regular basis in accordancewith conditions of the trade waste approval.
Removal of oily waste shall be done by a licensed waste handler.
Servicing records are to be kept on-site and made available to CRC Trade Waste Officers/Inspectors.

14.1

PRE-TREATMENT REQUIREMENTS FOR MECHANICAL & AUTOMATIVE

General Requirements
Generator/Source
Car wash areas – commercial-roofed and bunded

Characteristics of Waste

General Treatment Requirements

Oil, grease, solids,
Oil, grease, solids

Oil separator, float and alarm system,
trade wastewater meter.
Quick-break detergents must be used.
Discharge meter required.

Car wash areas – commercial- open areas

Oil, grease, solids,
Oil, grease, solids

As above + Demand driven diversion
system.
Discharge meter required.

Car wash areas – residential*-roofed and bunded

Oil, grease, solids,
Oil, grease, solids

Car wash areas – residential*- open areas

Oil, grease, solids,
Oil, grease, solids

Oil separator, float and alarm system,
trade wastewater meter.
Quick-break detergents must be used.
As above + Demand driven diversion
system.

Detailing

Grease, oil, solids,
detergents

Basket trap, Holding tank and Oil
Separator.
Discharge meter required.

Engine/gear box
reconditioning (small
operation)
Equipment hire company

Lead, grease, kerosene,
solids, detergent

Holding tank and Oil Separator

Oil, grease, kerosene,
solids, detergent

Holding tank and Oil Separator
Discharge meter required.

Lawn mower repairs

Oil, grease, grass, solids,
detergentsOil, grease, kerosene,
solids, detergents

Holding tank and Oil Separator

Mechanical workshop
Parts Washing (water based)
Parts Washing (Solvents)
Panel beating/spray painting

Oil, grease, detergentsOil, grease, solvents,
chemicals
Suspended solids, oil,greaseRadiator repair (small
operation)

Suspended solids, pH,
toxic metals

Service stations and refuelling
depots– workshop only

Oil and grease25

Holding tank and Oil Separator
Coolant is prohibited and cannot bedischarged to sewer direct or in-directly.
Holding tank and oil separator
Holding tank and NO discharge to sewer
licenced waste handler to remove waste.
Holding tank and Oil Separator
Coolant is prohibited and cannot bedischarged to sewer direct or in-directly.
pH adjustment prior to solid settlement
and pH adjustment before discharge tosewer; may require oil separation andmetal precipitate removal.
Coolant is prohibited and cannot bedischarged to sewer direct or in-directly.
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General Requirements
Generator/Source- covered forecourt***Characteristics of Waste

General Treatment Requirements

Not allowed

No discharge to sewer

Wreckers/Vehicle Dismantlers

Oil, grease, solids

Holding tank and Oil Separator
Coolant is prohibited and cannot bedischarged to sewer direct or in-directly.

Table 4: Pre-Treatment Requirements for Mechanical & Automotive*Note: Residential premises do not require a trade waste approval.
**Sewer connections from fuel dispensing areas, flammable and dangerous goods storage will not be
permitted.
A minimum 10,000 L holding tank not connected to the stormwater or sewerage system, with highlevel alarm, is a cost-effective option.
***Where there is an existing Trade Waste Approval for discharge collected from the forecourt andfuel-filling areas, Council may, at its discretion, continue to permit the discharge. However, Council
may require the Owner/Operator to submit for approval a Plan that outlines proposed upgrade
measures and timelines to disconnect from the sewer.

15.

OTHER ARRESTOR APPLICATIONS

Arrestor installations may be used for other trade waste treatment applications such as:• silt separation;• oil and grease (non-petroleum);• cooling;• neutralisation; and• other specific applications approved by CRC.
Each application will be assessed on the nature of the trade waste to be treated and the proposed
treatment method and site location.
Maintenance and cleaning of arrestors shall be carried out on a regular basis in accordance with theconditions of the trade waste approval. This can be carried out by a licensed waste handler under thecurrent relevant Queensland State legislation.
15.1

PRE-TREATMENT REQUIREMENTS FOR OTHER TRADE WASTE GENERATOR

Generator/Source
Backpackers
accommodation

Characteristics of Waste
FFOG
Lint
Temperature

Beauty and Nail salons

Alkali and wastewater

Cooling Towers

Chemicals, Temperature,
ColourDental/Medical/Veterinary
surgeries - Plaster Casts
Dental/Medical/Veterinary
surgeries - No Plaster castDental/Medical/ Veterinary
surgeries - non digital XRay

Solid & wastewater

Lab testing for levels of chemicals and othersewer admissions limits (Trade waste unit
will advise of testing requirements)
Discharge metering required.
Plaster Arrestor or separator.

Wastewater

Dry basket arrestor.

Rinse water

Silver recovery unit required.
Collect fixer & Developer for disposal bylicenced waste handler.

26

General Treatment Requirements
Refer to section 13 for Grease Arrestor
requirements
Dry Basket Arrestors with secondary
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Generator/Source
Dog Washes andHydrobath

Characteristics of Waste

Fruit/vegetables peelers

SolidsFuneral Parlour
Rubbish bin cleaning andRefuse Area-Commercial
Area(Domestic do not attract
trade waste approval but
pre-treatment still applies)
Hairdressing salon

Various

Hobby Clubs:<200L/day
Hobby Clubs:
200 –1,000 L/day

Suspended Solids
Suspended Solids

Under sink paster arrestor
Dry Basket Arrestor

Hobby Clubs:>1,000 L/day
Hostels

Suspended Solids

Kennels

Solids and wastewater

Laboratories and Science

Acid/alkali and chemical

Settlement trap min 1000Lt
Dry Basket Arrestor
Refer to section 13 for Grease Arrestor
requirements
Dry Basket Arrestors with secondary
strainers in floor waste and sinks
Basket traps with secondary strainers;
Dry cleaning techniques are to be performed
before wash down.
No solids are to be discharged to sewer
directly or in-directly
Neutralising or dilution trap

Laundries - Commercial

Lint, Temperature,
Chemicals

Laundromat (CoinOperated)

Lint, temperature

Mobile Bin Cleaning

Wastewater
Suspended solids
Chemicals
Suspended solids

Optician (<200 l/day)Hair and chemicals

Grease/suspended solids

Wastewater – hair dyes

FFOG
Lint
Temperature

Photographic waste- fast photo- X-rays
Schools

Rinse water and spent
solutionsArts and Crafts

Grease, Suspended
solids, chemicals, paint.

Home Economics

Grease, suspended
solids.

Science Blocks

Chemicals (alkaline andacidic).

27

General Treatment Requirements
Dry basket arrestors with secondary
strainers.
No organophosphates pesticides.
Direct to sewer with dry basket arrestor insinks and floor.
Nil pre-treatment
Dry Basket Arrestors in floor waste withsecondary strainers;
Direct to sewer

Direct to sewer with basket traps installed inhair wash basins
Dry Basket Arrestor

Lint traps screens 3mm mesh,
Cooling/Settlement trap with temperature
control <38C Discharge meter required
Lint screens 3mm mesh; >38C (washingmachine internal screens acceptable)
Discharge meter required
Holding tanks
Filter system
Recycled water
Dry basket arrestors with secondary
strainers in sinks
Silver recovery unit required and collect fixer& Developer for disposal by licenced waste
handler.

Dry basket arrestors with secondary
strainers in sinks.
Plaster / paint arrestor required dependingon activity.
Dry basket arrestors with secondary
strainers in sinks.
Grease arrestor required.
Dry basket arrestors with secondary
strainers in sinks.

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Generator/Source

Characteristics of Waste

General Treatment Requirements
Neutralising arrestor required.

Metal Works

Acids and metalfragments.

Tuckshops participating in
healthy food program

FFOGs and suspended
solids.

Dry basket arrestors with secondary
strainers in sinks. Arrestor required
depending on activity.
Dry basket arrestors with secondary
strainers in sinks and floor wastes.

Tuckshops

FFOGs and suspended
solids.

Student Accommodation

FFOG
Lint
Temperature

Dry basket arrestors with secondary
strainers in sinks and floor wastes. Greasearrestor required.
Refer to section 13 for Grease Arrestor
requirements
Dry Basket Arrestors with secondary
strainers in floor waste and sinks

Table 5: Pre-Treatment Requirements for Other Trade Waste Generator

Note: For sizing of pre-treatment requirements, refer to Section 13, Table 3.

16.

BUNDING

The area around all treatment installations must be bunded. There must be no spillage or overflow of
trade waste influent or effluent, sludge, or treatment chemicals to the stormwater or seweragesystems (by gravity or by automated mechanical means).
Bunding of toxic or hazardous substances shall meet recommendations of applicable best practiceguidelines, standards, or codes of practice.

17.

ENZYMES / BIOLOGICAL ADDITIVES

17.1

ENZYME AND BACTERIAL CULTURES

Enzyme and mutant or natural bacterial cultures may be permitted for use in certain biological pretreatment systems by way of specific application to CRC.
Applicants will need to demonstrate to CRC that the product to be used does not adversely impact on
the sewerage system or the environment.
17.2

GENETICALLY MODIFIED ORGANISMS (GMOS)

Any person wishing to discharge commercial products containing genetically modified organisms tosewerage must first obtain approval for release to coastal and inland waters from the Genetic
Technology Regulator, Canberra. CRC may then grant approval for discharge to sewerage.
Laboratories and other facilities which culture, package or transport GMOs should have in placesufficient procedures and pre-treatment equipment to ensure that no live GMOs are discharged to
sewerage.

18.

FOOD WASTE DIGESTERS (ANAEROBIC AND AEROBIC)a) Food waste digesters must be installed upstream of a properly sized authorised greasearrestor.
b) All digester installations must comply with Plumbing and Drainage regulations and installed bya licenced plumber/drainer.
c) All digester installations must include metering for calculation of volume discharged, and adownstream inspection and sampling port that provides access to a representative sample ofthe discharge.

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Acceptance Criteria.

19.

FRUIT AND VEGETABLE PEELERS

All peelers within this category and are subject to the same charges and conditions.
All peelers must be connected to drain and not connected to grease arrestors.

20.

MACERATORS

Bed pan macerators are prohibited.

21.

FOOD WASTE DISPOSAL UNITS

Food waste disposal units (garbage grinders / sink-to-sewer disposal units) are normally not allowable
but may be approved for non-domestic use by specific application to CRC. Where installation isapproved, the annual charge shall be based on motor power for Category A and Category B fees canbe found on the CRC website fees and charges.

22.

SWIMMING POOLS / ORNAMENTAL PONDS

The back-wash water and water from commercial and public swimming pools and ornamental ponds
must not discharge to sewer without a trade waste approval. Trade waste charges in accordance withthe discharge category will apply.
This plan approves the discharge of swimming pool backwash water to sewer for class 1A buildings(dwelling) and class 2 buildings.

23.

MEDICAL, CLINICAL, VETERINARY AND INFECTIONS WASTES

Solid wastes from any hospital, clinical, veterinary facilities, laboratories, convalescent home, nursing
home or health transport facility including but not limited to clinical solid wastes, any paper or plastic
item of a disposable nature, or any portions of human or animal tissue, shall not be discharged to thesewer. Refer to Schedule 2 of this plan.
Discharging trade wastes including faeces and body fluids to sewer from any hospital, clinic, office orsurgery of a medical or veterinary facility or laboratory, convalescent or nursing home or healthtransport facility is permitted in accordance with the relevant legislation.
Infectious or hazardous wastes deemed to pose a threat to public health and safety may not bedischarged to the sewer without approval from CRC. Such wastes shall require treatment to renderthem non-infectious or non-hazardous prior to discharge. If approved for discharge, trade waste
charges will apply.

24.

CONTAINMENT OF TOXIC / HAZARDOUS SUBSTANCES

Any potentially toxic or hazardous substances shall be stored in bunded areas where leaks, spillage,or overflows cannot be drained by gravity or by any automated mechanical means to sewerage or thestormwater drainage system.
Bunding of toxic or hazardous substances shall meet recommendations of applicable best practiceguidelines, standards, or codes of practice.

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25.

DISCHARGE OF TRADE WASTES FROM VESSELS, VEHICLES AND
AIRCRAFT

25.1

VESSELS

Depending on the quality, the discharge of black and grey liquid waste from vessels may be permitted
via approved "pump out" facilities at ports and marinas. The operator of such facilities must hold a
trade waste approval to discharge into CRC sewerage infrastructure.
Charges in accordance with Section 6.2.4 will apply.
THE DISCHARGE OF UNTREATED BILGE WATER IS PROHIBITED TO SEWER.
25.2

BUSES, AIRCRAFT, RECREATIONAL VEHICLESThe discharge of toilet waste from buses, aircraft or recreational vehicles may be permitted at
approved disposal locations such as bus or transport depots, terminals, and caravan parks. The
operator of such facilities must hold a trade waste approval to discharge into CRC sewerage
infrastructure.
Charges in accordance with Section 6.2.4 will apply.

26.

LANDFILL LEACHATE & DISPOSAL FACILITY WASTEWATER

Leachate from landfill sites and wastewater from waste treatment/disposal facilities may not bedischarged to sewer without approval through the issue of a trade waste approval.
Charges in accordance with the discharge category classification will apply under Section 6.2.4 andSchedule 1 of this Plan.

27.

DISCHARGE FROM OPEN AREAS

THE DISCHARGE OF RAINWATER AND STORMWATER TO SEWER IS PROHIBITED.
The ingress of surface water from a potentially contaminated open area to sewerage can cause
severe operational problems for CRC. However, there may be circumstances when it isenvironmentally beneficial to accept these wastes to the sewer under strict controls.
The discharge to sewer from any potentially contaminated open area that is raised or bunded may beconsidered, provided the quality and quantity requirements of this plan are met.
Applicants should note that an open area approval is not an alternative to the appropriate of polluted
areas such as roofing or other methods to keep water away from the open area. Applicants must
demonstrate to CRC that all appropriate measures to keep runoff water away from the potentiallycontaminated open area have been taken.
A trade waste approval is required to discharge such waste.
All applications for sewer discharge from open areas must have controls incorporated in the designthat will, in the opinion of CRC ensure that:•••

all contaminated trade waste is pumped to sewer at a rate acceptable to CRC;
all discharge to sewer ceases automatically after a predetermined level of rainfall volume (mm)and/or intensity (mm/hr) to be set by CRC;
the "first flush" volume is collected and segregated during wet weather with additional runoff
directed to the storm water system. Applicants should seek advice from CRC on the required“first flush” volume to be collected;

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the "first flush" volume collected is pumped to sewer, after any necessary pre-treatment, nosooner than one (1) hour after the rain stops anda suitable device for the determination of sewer discharge flow and volume to be installed.

Charges in accordance with the discharge category classification will apply under Section 6.2.4 andSchedule 1.

28.

DENTAL FACILITIESA Trade Waste Approval will not be required for Dental facilities provided any trade waste generated
and discharged to sewer through an Amalgam Separator.
Note: If Film Processing or plaster casting is carried out on site, a Trade Waste Approval andadditional pre-treatment may be required.

29.

CAR WASH FACILITIESAt least 50% of all water used in a car wash facility must be re-circulated.

30.

WORK PRACTICESWork practices (practices) refers to all activities that minimise trade waste discharge. There is anumber of practices that can be adopted to reduce wastewater levels, and lessen the load placed on
pre-treatment facilities. Good practice procedures must be adopted wherever possible and in somecircumstances can even classify the generator as a non-discharger.
Some of these practices are:• Use less water by adopting dry cleaning methods. The less water used, the less tradewastewater to be treated.
• Dry cleaning methods include wiping up spills and sweeping, rather than hosing.
• There are absorbent packs available to soak up oil spills.
• Ensure all equipment is properly cleaned and maintained.
• Ensure that adequate storage is provided for used oil and that a collection program is arranged
with an Oil Recycler (Discharging oil down the drain is PROHIBITED).
• Use cleaning products that have a pH of 6-10 at working concentrations.
• Remove all solid food waste from cooking and eating utensils before washing.

31.

DISCRETIONARY POWER

Notwithstanding the provisions of this plan, due to the complexity of many industrial wastes and theneed to protect the CRC sewerage system, employees, and the environment, acceptance of any
given trade waste to sewer will always be at the discretion of CRC.

32.

RECORDS AND REPORTS

The generator is required to keep records of the cleaning and maintenance of the pre-treatment
equipment in accordance with the trade waste approval.
This includes and not limited to recording the removal of grease arrestor waste, oils, fats, greases,
coolant, prohibited substances.
Records to be kept on site and made available to CRC officers upon inspection.
32.1

IMPLEMENTATION RECORDS AND REPORTS

This plan will become effective immediately.

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APPENDIX A: RELEVANT LEGISLATION
Relevant State of Queensland Legislation
•
•
•

•
•

Water Supply (Safety and Reliability) Act 2008
Plumbing and Drainage Act 2018
Environmental Protection Act 1994
 Environmental Protection Regulation 2008
 Environmental Protection (Air) Policy 2019 Environmental Protection (Water) Policy 2009
Local Government Act 2009
Planning Act 2016

Other Relevant Legislation and Guidelines
•
•
•
•
•
•
•

Radiation Safety Act 1999
 Radiation Safety Regulation 2010
Gene Technology (Queensland) Act 2016
Gene Technology Act 2000 (Commonwealth)
Australian Sewage Quality Guidelines June 2012
National guidelines for waste in the health industry, 1999
National Guidelines for Managing Food, Fats, Oils and Grease (FFOG) from Food Premises,2018 (WSAA)
National Health and Medical Research Council.

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SCHEDULE 1:

SEWER ADMISSION LIMITSThe upper limits for the quality of trade waste discharged to the sewer for all categories are set out
below. These admission limits shall apply immediately. They are subject to periodic review.
General Limits
Parameter

Concentration, mg/L except *Temperature *pH *Biochemical Oxygen Demand (BOD5) +#Chemical Oxygen Demand (COD) +#Total Organic Carbon (TOC) +#Suspended Solids +#Total dissolved solids (TDS) +#Total oil/grease (freon extractable)
Gross solids *< 38oC
6 - 10600 mg/l
1200 mg/l
1200 mg/l
600 mg/l
4000 mg/l
200
non faecal gross solids shall have a maximum linear
dimension of less than 20mm and a quiescent settlingrate of less than 3m/hr.

Colour *limited such as not to give any discernible colour intreatment works discharge

Odour *

not detectable in 1% dilution or causing an odour
problem in CRC's sewerage system

Chlorine (as Cl2)
Sulphate ( as SO4--) #Sulphite ( as SO2)
Surfactants - Anionic (MBAS)
Aluminium (as Al) #Iron (as Fe) #Ammonia plus ammonium ion (as N) #Total Kjeldahl Nitrogen (as N) #Total Phosphorus (as P) #Manganese (as Mn)

10
2000
100
500
100
100
100
150
50
100

+ The total mass load and the capacity of the sewerage system to accept the load shall be considered
for each application.
# CRC may in some circumstances accept waste containing higher concentrations of thesesubstances. Additional charges for treatment (Section 6) will apply.
Specific Limits - Inorganic
Parameter
Boron (B)Bromine (Br2)
Fluoride (F-)
Cyanide (CN-)
Sulphide (S--)

Concentration, mg/L
100
10
30
5
5

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Specific Limits - Metals
Parameter

Arsenic (As)Cadmium (Cd)Chromium (Cr)Total
Hexavalent
Cobalt (Co)
Copper (Cu)Lead (Pb)
Mercury (Hg)
Nickel (Ni)Selenium (Se)Silver (Ag)Tin (Sn)
Zinc (Zn)Maximum
Concentration
mg/L

Lower Daily Mass Load
g/day

0.05
2

5
6

20
10
10
10
10
0.05
10
5
5
10
10

75*
30
75
30
0.15
30
15
15
30
75

The concentration values apply to discharges having a daily mass load between the Lower Daily Mass
Load (LDML) and the Upper Daily Mass Load (UDML). For small discharges with a daily mass load
below the LDML, no concentration limits apply. Dischargers who exceed CRC's UDML limits will be
required to take measures to meet the UDML. This may involve treating to a lower concentration than
indicated above.
* For discharges below the Lower Daily Mass Load, hexavalent Cr must be reduced to trivalent Cr.

Specific Limits - Organic
CRC may request specific demonstrable evidence based on degradability and toxicity concerning
substances listed below.
Parameter

Maximum Concentration, mg/L

Formaldehyde (HCHO)
Phenolic compounds (as Phenol)
Pentachlorophenol
Petroleum hydrocarbons
Halogenated Aliphatic hydrocarbons
Halogenated Aromatic Hydrocarbons (HAHs)
Polychlorinated biphenyls (PCBs)
Polybrominated biphenyls (PBBs)
Polynuclear Aromatic Hydrocarbons (PAHs)
Pesticides: General (insecticides/herbicides/fungicides) **Pesticides: Organophosphates
Azinphos-methyl
Azinphos-ethyl
Coumaphos
DemetonDichlorvos
Dimethoate
Disulfoton

50
100
5
30
5
0.002
0.002
0.002
5
1.0
0.1

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Fenitrothion
Fenthion
Malathion
Methamidophos
Mevinphos
Omethoate
Oxydemeton-methyl
Parathion
Triazophos
Trichlorfon
Pesticides- Organochlorines
AldrinChlordane
DDT
Dieldrin
Heptachlor
Lindane

0.001
0.006
0.003
0.001
0.003
0.100

** This category covers all pesticides other than those specifically listed under organophosphate andorganochlorine pesticides.

Petroleum Hydrocarbons
ParameterTotal
C6 – C9 percentage
BenzeneTolueneEthyl benzene
Xylene (total)

Maximum Concentration, mg/L
30
5
0.04
0.5
1.0
1.0

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SCHEDULE 2:•

PROHIBITED DISCHARGES

Prohibited substances as defined in Schedule 1 of the Water Supply (Safety and Reliability) Act
2008•
A solid or viscous substance in a quantity, or of a size, that canobstruct sewerage or interfere with the operation of sewerage.
Examples of solids or viscous substances that are prohibited substances ifof a size or in the quantity mentioned in item 1—
 ash, cinders, sand, mud, straw and shavings
 metal, glass and plastics
 paper and plastic dishes, cups and milk containers whether whole or ground by garbage grinders
 rags, feathers, tar and wood whole blood, paunch manure, hair and entrails
 oil and grease cement laden wastewater including wash down from exposed aggregate concrete surfaces• A flammable or explosive solid, liquid or gaseous substanceincluding petrol.
•
Floodwater, rainwater, roof water, stormwater, subsoil waterand surface water.
• A substance that, given its quantity, is capable alone, or byinteraction with another substance discharged into sewerage,of—(a) inhibiting or interfering with a sewage treatment
process; or(b) causing damage or a hazard to sewerage; or(c) causing a hazard for humans or animals; or(d) creating a public nuisance; or(e) creating a hazard in waters into which it is discharged;or(f) contaminating the environment in places where effluent
or sludge from a sewage treatment plant is discharged orreused.
Example of substance under item 4—
a substance with a pH lower than 6.0 or greater than 10.0, or having
another corrosive property•

A substance at a temperature of more than—(a) if the local government has approved a maximum
temperature for the substance—the approved maximum
temperature; or(b) if paragraph (a) does not apply—38ºC.

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SCHEDULE 3:

SUBSTANCES NOT INCLUDED IN TABLES

Any substance not listed in the above tables is a prohibited discharge and may not be discharged
without prior approval from CRC. CRC may request specific demonstrable evidence based on
degradability and toxicity for any substance when assessing acceptance to sewer.

SCHEDULE 4:

DISCHARGE PERCENTAGESACTIVITYDISCHARGE %Aged Care Facility
BakeryBeauty Services
Brewery
Butcher
Cafe
Caravan Park
Catering
Child Care Centre
Commercial Car Wash
ChemicalCleaning
Club
Commercial Laundry
Concrete Batching
Dairy
Dental
De Watering
Engineering
Food Prep. No Grease
Function Centre
Glass Manufacturer
Animal Grooming
Hairdresser
Hospital
HostelHotel
Hygiene Services
Ice Production
Laboratory
Laundry
Liquid Waste
Live Fish Export
Food Manufacturing with Grease
Mable/Granite Manufacturing
Mechanical
MedicalMetal FinishingMotel
Nursing Home
Paint
Pallet Manufacturer

37

85
85
100
10
90
90
70
90
90
50
90
100
90
85
2
90
100
100
90
85
90
90
90
90
90
90
90
100
5
90
85
90
90
90
90
90
90
85
90
80
90
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ACTIVITY
Panel Beaters
Photographic
Pool
Pottery
Poultry
Plant Propagation
Printing
Quarantine Container Wash
Down
Radiator Shop
Rendering
ResortRestaurant
Rustproofing
Retirement Village
SchoolServicing of Scuba Equipment
Seafood Processing
Service Station
Shelter
Shipyard
Soil Testing
Storage
Student Accommodation
Supermarket
Take Aways
TimberTour Operator
Treatment Plant
Waste Transfer Station
Vehicle Detailing/Washing
Vehicle Washing
Veterinary
Wine Production
Workshop

38

DISCHARGE %
85
90
70
90
90
100
90
90
90
90
90
90
85
90
80
90
90
90
90
90
90
90
85
90
90
90
90
90
90
90
80
70
90
90

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