Stage 1 Irrigation Area_90 Beach Rd Noosa North Shore 12.06.2020 · MCU19/0117

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Engineering the Future

EFFLUENT IRRIGATION MANAGEMENT PLAN - STAGE 1

REPORT

NOOSA NORTH SHORE ECO-TOURISM PORTAL

Petrac Leisure NNS-S Pty Ltd

Ee ati we,

Pete, S44l356 —-

Cardno (Qld) Pty Ltd
ABN 57 051 074 992

Level 1, 5 Gardner Close, Milton QLD 4064
PO Box 388, Toowong QLD 4066 Australia

17 July 2006 Telephone: 07 3369 9822
Job No. 7296/08 Facsimile: 07 3369 9722

International: +61 73369 9822

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EFFLUENT IRRIGATION MANAGEMENT PLAN - STAGE 1

NOOSA NORTH SHORE ECO-TOURISM PORTAL

cS» Cardno

 

Cardno (Qld) Pty Ltd
ABN 57 051 074 992

5 Gardner Close Milton Q 4064
PO Box 388 Toowong
Queensland 4066 Australia
Telephone: 07 3369 9822
Facsimile: 07 3369 9722
International: +61 7 3369 9822
Email: [email protected]

Web: www.cardno.com.au

 

Document Control

 

 

 

 

 

 

 

 

Author Reviewer
Version Date
Name Initials Name Initials
1 9 November 2005 L. Clough LC C. Sutcliffe cs
2 17 July 2008 L. Clough Wy C. Sutcliffe AS

 

 

 

"© 2006 Cardno (Qld) Pty Ltd All Rights Reserved. Copyright in the whole and every part of this
document belongs to Cardno (Qld) Pty Ltd and may not be used, sold, transferred, copied or
reproduced in whole or in part in any manner or form or in or on any media to any person without the
prior written consent of Cardno (Qld) Pty Ltd.”

 

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EFFLUENT IRRIGATION MANAGEMENT PLAN - STAGE 4
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EFFLUENT IRRIGATION MANAGEMENT PLAN - STAGE 1
NOOSA NORTH SHORE ECO-TOURISM PORTAL

TABLE OF CONTENTS

 

 

4, INTRODUCTION isscssvisissiccsauansncconsscnessaaseasipnesesanansosianianssavanneaanvennieanansnonnnayiasennenananmn animes 1
2  (PROPOSED'SEWAGE TREATMENT PLANT wiisissiiiriasiscseserennesviaccinoweacaraaressmeoneasean 2
2.1 De@SIQN FIOWS 00... einer ener etre seis eiesnesitnieenesneeieniesnesietireniessesneserenienennee 2
2.2 STP Design and Operation ......cccecceccceteeeecieeeiecieneceenecieeecseecneciesneseeneecaes 2
3. (PROPOSED TREATED EFFLUENT IRRIGATION .ccsccssscseccssssscsccsusrcveensnsvisinsiesssiessiness 4
3.1 Infigation Areas Des n inawenmsmmanvevememmncnennnn oN 4
3.2. Irrigation Scheduling
3.3 Groundwater and Surface Water Quality 0.0... cceseseseseesseeseeseeseeseseneeneseeeeeeseeereees 5
4. EFFLUENT IRRIGATION MANAGEMENT PLAN. ........cccscsssssessesseseeseeseesessnsesseneeseneesesees 6
134 TSriNGiOgy cco mercom nce ENEIRINN 6
4.2 EIMP Structure.....
4.3 Relevant Legislation...........

  
 
  
 

4.4 Program and Contractual Obligations...
4.5 Non-Compliance and Corrective Action Requirements ..

4.6 Element 1: Effluent Storage LagoOn.........cccceeeeenes vn 9
4.7 Element 2: Effluent Irrigation System Infrastructure a 11
4.8 Element 3: Effluent Irrigation Areas ........ceeeee .13

 

4.9 Element 4: Contingency ManagemMent.........ccceceeeeeeieeeeieeneseeeeeee

 

LIST OF TABLES

Table 1: Design Flows te STP smecusnvanrenuevreesmmmanverurcemmnnnnuneuamrnmmennen 2
Table 2: Clearstream: SBMBR' Effluent Qualllty csicvcssscinvssessensensnrconvorercavisvengercessreees 3
LIST OF FIGURES

Figure 1 Proposed STP, Wet Weather Storage and Irrigation Areas

Figure 2 Monitoring Locations

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1. INTRODUCTION

Petrac proposes to construct and operate the Noosa North Shore Eco-Tourism Portal
within Lot 7 on RP 844337 (the site), which is located on Maximillian Road to the south
of Beach Road in the Parish of Laguna, County of March.

It is proposed to treat wastewater from the site with an on-site tertiary sewage
treatment plant (STP) and to dispose of the effluent by land irrigation. The STP will
treat wastewater to Class A+ standards and will have a peak design capacity of 483
equivalent persons (EP). This STP will initially be constructed to treat flows from Stage
1 only (112 EP).

This Effluent Irrigation Management Plan (EIMP) has been prepared to ensure
appropriate management of potential impacts that may occur as a result of the
operation of the proposed sewage treatment plant (STP) to treat wastewater generated
from Stage 1 of the development in accordance with the Noosa North Shore Eco-
Tourism Portal Development Code and the Conditions of the Negotiated Decision
Notice dated 16 December 2004.

 

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2:

PROPOSED SEWAGE TREATMENT PLANT
2:1 Design Flows

The predicted volume of wastewater requiring treatment for Stages 1 to 4 of the
proposed development at full occupancy has been estimated as 67.6 kL/day. This is
based on a total EP of 483 following completion of Stage 4 of the proposed
development and a rate of 140L/EP/day.

The STP will initially be constructed to provide treatment facilities and disposal by
irrigation for the wastewater generated from Stage 1 of the development. This will
comprise a design loading of 15.6kL/day. A second module will be added to the STP at
an appropriate time to treat wastewater generated from Stages 2 to 4 of the
development. Table 1 below shows the design occupancy rates and wastewater flow
rates for the two phases of the STP construction.

Table 1: Design Flows to STP

 

Development Stage Equivalent STP Design
Persons (EP) | Loading (kL/day)
Stage 1 112 15.6
Stages 2 to 4 371 52.0
Total 483 67.6

 

 

 

 

 

 

 

 

2.2 STP Design and Operation

The STP proposed for installation at the site is a membrane bioreactor with submerged
ultra-filtration membrane (Clearstream SBMBR). The filtration membranes remove
microorganisms and most suspended solids from wastewater to produce a high quality
effluent suitable for use as low grade process water or for irrigation purposes.

Nitrogen removal is achieved through nitrification and denitrification processes.
Phosphorous removal from wastewater is achieved by two processes:

(a) chemical precipitation and removal by solids separation and;
(b) enhanced biological phosphorous removal through uptake by
microorganisms and biosolid removal, processing and disposal or reuse.

 

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The Clearstream SBMBR produces effluent of Class A+ standard. The quality of
treated effluent produced by the system is given in Table 2 below.

Table 2: Clearstream SBMBR Effluent Quality

 

 

 

 

 

 

 

 

 

 

Parameter Quality
Biochemical Oxygen Demand < 10mg/L
Suspended Solids < 10mg/L
Faecal coliforms (E. Coli) < 10 cfu/100mI
Total Nitrogen < S5mg/L

Total Phosphorous < img/L
Turbidity <2NTU

 

Management measures for operation and maintenance of the STP are outlined in the
Sewage Treatment Site-Based Management Plan (SBMP) prepared for Stage 1 of the
development. This SBMP provides details of effluent quality monitoring and
performance criteria.

 

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3.

PROPOSED TREATED EFFLUENT IRRIGATION

It is proposed to reuse treated sewage effluent from the STP for landscape irrigation.
The location of the proposed irrigation area is indicated on Figure 1. The STP will
provide tertiary treatment with removal of microorganisms, suspended solids and
nutrients including nitrogen and phosphorous. Final effluent released from the STP will
be of a high quality with treatment to a Class A+ standard. Treated effluent use will be
carried out in accordance with the requirements of the National Water Quality
Management Strategy Guidelines for Sewerage Systems Use of Reclaimed Water.

The irrigation area will be vegetated with turf or pasture grass. Irrigation of the area will
be by sub-surface drip irrigation system. A diversion bank is proposed along the
western margin of the irrigation area to direct external runoff away from the irrigation
area towards the existing dam on the property to the north.

3.1 Irrigation Areas Design

MEDLI modelling was used to determine an acceptable combination of irrigation area
and wet weather storage size for effluent quantities generated from the STP. Various
combinations of irrigation scheduling, irrigation area, plant type and wet weather
storage volumes were trialled to determine a suitable combination that would result in
minimal overflows from the wet weather storage, acceptably low N and P levels in the
deep drainage, and no build up of phosphates or salinity in the soil or groundwater.

The expected effluent irrigation rate for the south site has been calculated as 47.1
kLiday (420EP x 112 L/EP/day), or 17.2 ML/year. These figures were adopted for the
purposes of MEDLI modelling. The EP figure of 420 is based on an average occupancy
rate of between 80% and 90% and is reduced from the EP of 482 at full occupancy of
the south site. The per capita wastewater generation rate is reduced from 140L/EP/day
to 112L/EP/day to account for the quantity that will be recycled for toilet flushing. The
application rate for treated effluent to irrigation areas was calculated as approximately
5 ML/ha/year requiring a disposal area of 3.8 hectares. The required wet weather
storage capacity was determined to be 3ML providing 60 days storage.

For Stage 1 the predicted EP of 112 will require a disposal area of 1 hectare, which will
be constructed as part of the Stage 1 operational works. The wet weather storage
required is approximately 940kL, however, it is proposed to construct the storage
lagoon for the full development during Stage 1. The storage lagoon will be a minimum
of 4.6ML capacity. The requirements for the size of irrigation areas will be confirmed at
each stage of development after monitoring of the receiving environment to
demonstrate that no environmental impacts arising from operation of the STP and
effluent irrigation system has occurred.

3.2 Irrigation Scheduling

Irrigation will be restricted to a maximum of 4 mm per day. The moisture content of the
irrigation area will be determined prior to irrigation taking place. It is proposed that
moisture-sensing probes will be installed throughout the irrigation area. Readings from
these will indicate the degree of saturation of the soil and whether irrigation can take
place. Should ponding occur, irrigation will cease until such time as the soil moisture
content has sufficiently reduced to eliminate further ponding.

 

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It is proposed to irrigate the areas only during non-rainfall days, with irrigation only
sufficient to wet the soil to its undrained upper limit. Automatic irrigation scheduling
equipment with soil-moisture probes and rain sensors will be necessary for control of
the irrigation. Irrigation will only re-commence a minimum of 4 hours following
cessation of rainfall.

 

3.3 Groundwater and Surface Water Quality

During effluent treatment and disposal, monitoring of groundwater quality will be
undertaken annually as specified by the conditions of the preliminary development
approval. Quarterly baseline monitoring of groundwater quality has been underway
since December 2004 to determine current groundwater conditions. In accordance with
the conditions of the development approval, quarterly baseline monitoring of receiving
waters including groundwater and surface waters will be conducted for a minimum of
12 months prior to commencement of construction works for the proposed
development and will continue during construction and for 2 years after completion of
construction works.

Groundwater monitoring will include analysis of pH, Electrical conductivity, Total
dissolved solids, Biochemical Oxygen Demand, Sodium, Salinity, Chloride, Sulfate,
Alkalinity, Nitrate and Nitrite, Ammonia, Total Nitrogen, Total Phosphorous and Faecal
coliforms. The quality of surface water runoff from irrigation areas will be monitored
where there is a minimum of 30 mm rainfall in the preceding 24 hours sufficient to
cause runoff from the irrigation area. Surface water monitoring will include two event
samples of runoff from the irrigation areas collected annually, and analysed for pH,
Total Nitrogen, Total Phosphorus, Electrical Conductivity, and Faecal Coliforms.

The discharge limits contained in the Development Code may be amended in
consultation with the Environmental Protection Agency and Noosa Council following
determination of existing water quality conditions through baseline monitoring. No
criteria have been specified for groundwater quality, therefore it is proposed that criteria
be defined following the completion of baseline monitoring which commenced in
December 2004. Locations for water quality monitoring are presented on Figure 2.

 

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4. EFFLUENT IRRIGATION MANAGEMENT PLAN

 

4.1 Terminology

The term Principal refers to Petrac Leisure NNS-S Pty Ltd.

The term Operator refers to any party or company responsible for operation of the STP
facility and infrastructure and the effluent irrigation system.

The term Contractor refers to any party or company performing works associated with
operation of the sewage treatment plant and effluent irrigation system and includes all
employees of the Contractor and sub-contractors.

The term Consultant refers to the civil and/or environmental engineering consultant
employed by the Principal.

The term Works refers to all matters associated with the sewage treatment plant and
effluent irrigation system.

The term EPA refers to the Environmental Protection Agency.
The term EIMP refers to this Effluent Irrigation Management Plan.
The term Act refers to the Environmental Protection Act 1994.

4.2 EIMP Structure

This EIMP includes the following key components:
e Rationale: identification of the element to be managed and the environmental
impact of activities associated with each element.

e Objectives: identification of the environmental objectives and targets to be
achieved in line with the rationale and in compliance with applicable legislation.

e Tasks/Actions: monitoring and management measures to be implemented in order
to achieve the stated objectives and targets and to ensure impact mitigation.

e Performance Indicators: measurable indicators and standards set to assess the
efficiency of management measures and determine compliance with the EMP.

e Monitoring: monitoring requirements to measure compliance with the performance
indicators and frequency of monitoring.

e Reporting and Review: the requirements for reporting of monitoring results and
review of management measures where required.

e Corrective Action: measures to be undertaken should monitoring indicate non-
compliance with performance indicators.

 

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4.3 Relevant Legislation

The primary legislation relevant to this EIMP is the Environmental Protection Act 1994
(EP Act). The EP Act protects environmental values through development and
implementation of environmental protection policies and regulates environmentally
relevant activities prescribed in the Environmental Protection Regulation 1998.

The Environmental Protection (Water) Policy 1997 (EPP Water) ensures protection of
environmental values from activities that may result in the release of contaminants to
waterways or stormwater drains.

4.4 Program and Contractual Obligations

The EIMP covers the operation phase of the works. This is defined as the period from
the commencement of sewage treatment and disposal works to the substantial
completion of the sewage treatment and disposal works. The Principal is generally
responsible for ensuring that the provisions of the EIMP are met, with the exception of
certain planning or design issues, which are explicitly noted throughout the EIMP as
being the responsibility of the Contractor or the Consultant.

The Principal shall ensure that all persons who are to be employed or sub-contracted
for the works shall be trained as to their individual responsibilities as set out in this
EIMP and as provided by the Act, including the following.

General Environmental Duty — whereby a person in the performance of their duties
shall not do so in a manner which will cause, or is likely to cause, environmental harm
unless the person takes all reasonable and practical measures to prevent or minimise
the harm.

Duty to Notify Environmental Harm — whereby if a person in the performance of their
duties becomes aware that serious or material environmental harm is caused or
threatened, then the person must contact the Contractor whereupon the Contractor
must immediately notify the Principal and/or the EPA.

Compliance with the EIMP — whereby a person in the performance of their duties
shall do so in a manner that ensures that the provisions of this EIMP are complied with.

4.5 Non-Compliance and Corrective Action Requirements

The Principal shall assume responsibility for implementation of this EIMP. Where the
Principal becomes aware of a site or operational condition that does not comply with
stated performance indicator(s) of this EIMP, there is a requirement for corrective
action. A Corrective Action Request (“CAR”) form is to be completed and authorised
where appropriate in general compliance with the example CAR form provided in
Appendix A of this EIMP. The Principal is also required to maintain a register of CARs,
which shall demonstrate that appropriate actions have been completed within a
suitable timeframe.

Any CAR registered in accordance with this EIMP shall be provided to the Principal,
any State or Commonwealth Government Department, any statutory authority or other
person, consensually or as lawfully required.

 

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In some instances, further investigation or monitoring may be required to establish
whether the Principal has failed to adequately implement the EIMP, or has failed to
comply with relevant legislation, guidelines and statutes. In these instances, an
independent party such as the Consultant shall carry out the investigation or
monitoring. If it is established that the cause for non-compliance with the stated
performance indicator(s) has arisen from the Contractor's actions or omissions, then
the costs of the monitoring shall be deducted from payments to the Contractor and paid
to the Consultant, otherwise the costs of the monitoring shall be obtained from the
Principal and paid to the Consultant.

 

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4.6

Element 1: Effluent Storage Lagoon

 

RATIONALE:

Uncontrolled discharge from the effluent storage lagoon may result in
impacts on soils, surface water and groundwater. Management
measures are required to prevent uncontrolled discharges.

 

OBJECTIVE:

To operate and manage the effluent storage lagoon to prevent
deterioration of receiving environments.

 

TASKS/
ACTIONS:

e The storage lagoon shall be constructed with a 600mm
impermeable clay lining to reduce the possibility of infiltration of
treated effluent to groundwater

e Stormwater diversion banks/drains shall be installed around the
effluent storage lagoon to exclude overland runoff from entering
the lagoon.

e The storage lagoon shall be operated and maintained to ensure
lagoon stability and prevent discharge through the bed or banks of
the lagoon.

e In the event that effluent levels within the lagoon rise within 1m of
the top level, super-irrigation of the effluent irrigation areas shall
be undertaken.

e Where super-irrigation is not possible due to wet weather or
soil conditions, the excess effluent shall be tankered to a
licenced effluent disposal facility.

e Where effluent quality within the lagoon is determined by
monitoring to be not in compliance with the specified release
limits, effluent shall be transported back to the STP for re-
treatment.

 

PERFORMANCE
INDICATORS:

Quality of effluent released from the effluent storage lagoon shall
comply with the following water quality objectives specified by EPA in
the Negotiated Decision Notice.

 

Parameter

Quality Criteria

Release Limit

 

Biochemical Oxygen
Demand (BOD)

20mg/L

maximum

 

Dissolved Oxygen (DO)

2.0mg/L

minimum

 

Suspended Solids (SS)

20mg/L

maximum

 

pH

6.5 — 8.5

range

 

Total Nitrogen (TN)

5mg/L

maximum

 

Total Phosphorous (TP)

Aimg/L

maximum

 

Free Residual chlorine

0.3 - 0.7mg/L

range

 

Faecal Coliforms (FC)

< 10 cfu/100mI
< 100 cfu/100ml

median
maximum

 

 

Turbidity

 

2 NTU

 

 

80" percentile

 

MONITORING:

 

 

Levels within the effluent storage lagoon shall be monitored on a
weekly basis.

The quality of effluent in the treated effluent storage dam shall be
monitored on a quarterly basis for pH, conductivity BOD, DO, SS, TN,
TP, FC, ammonia, nitrite and nitrate, turbidity and residual chlorine.

 

 

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REPORTING/ Accurate records shall be maintained of effluent levels within the
RECORDING: lagoon and all monitoring results.
Operators shall submit monthly reports of all monitoring data to
Council during construction and establishment phases.
Operators shall submit annual reports of all monitoring data to the
EPA on annual basis or as specified in the development approval
conditions.
CORRECTIVE Should there be non-compliance with the stated performance
ACTIONS: indicator the following corrective actions are to be implemented.

Identification of the cause of the non-compliance;
Implementation of appropriate mitigation measures as determined
by the Principal; and

e Relevant validation monitoring to confirm that the nominated
corrective actions have been effective.

The Principal shall implement the corrective action(s) as required
within the agreed time frame noted on the CAR.

In the event of a significant environmental incident the emergency
details in Element 5 of this EIMP shall be followed.

 

 

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4.7 Element 2: Effluent Irrigation System Infrastructure

 

RATIONALE:

Failure of components of the irrigation system may result in the
accidental or uncontrolled release of contaminants to receiving
environments. Maintenance and management measures are
required to ensure no significant impacts occur to receiving
environments.

 

OBJECTIVE:

To maintain and manage the effluent irrigation system to prevent
impacts due to accidental effluent release to the receiving
environment.

 

TASKS/
ACTIONS:

e Effluent irrigation infrastructure shall be constructed so as to
eliminate the possibility of spray drift from the area.

e Effluent irrigation pipelines shall be placed underground to
reduce the risk of damage from impact with machinery such as
lawnmowers.

e The underground piping for the irrigation main lines shall be
placed in trenches of 450mm depth and sub-surface drippers
shall be placed at 50mm to 100mm below the surface. Pipe
bedding materials shall consist of sand.

e Prior to backfilling of underground piping, the irrigation system
shall be checked for any leaks or failures within the system and
to ensure that distribution of flow is provided evenly across the
entire irrigation area.

e Fittings with connection to the effluent irrigation system shall be
colour coded and be distinguished from those of the potable
water system to prevent cross-connection. The pipe colour
coding system shall be as follows.

Recycled Water — purple/lilac pipes
Fire suppression water — blue pipes
Potable water — steel or black PVC pipes

e Adequate valving shall be provided in pipelines to allow isolation
for repairs. Bursts within the irrigation system shall be isolated
and repaired as soon as practicable.

e A preventative maintenance program shall be established to
ensure that irrigation equipment is maintained in adequate
operating condition.

 

PERFORMANCE
INDICATORS:

Accidental spills or contamination of receiving environments due to
failures in the irrigation system shall constitute non-compliance with
this EIMP.

 

MONITORING:

 

 

Weekly monitoring shall include visual inspection of all irrigation
system infrastructure including all visible pipelines and fittings, all
pump infrastructure and connections and any stormwater diversion
banks surrounding the irrigation area.

Visual inspection of the condition of all above ground distribution
infrastructure over the site shall be undertaken including all visible
distribution pipes and pump sheds on a weekly basis.

 

 

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REPORTING/ Records shall be maintained of any failure of irrigation system

RECORDING: components and of any repairs or corrective actions undertaken.
Operators shall submit monthly reports to Council during
construction and establishment phases providing details of all
monitoring results, environmental incidents and emergencies and
corrective actions undertaken.

CORRECTIVE Should there be non-compliance with the stated performance

ACTION: indicator the following corrective actions are to be implemented.

e Identification of the cause of the non-compliance;

e Implementation of appropriate mitigation measures as
determined by the Contractor in consultation with the Principal;
and

e Relevant validation monitoring to confirm that the nominated
corrective actions have been effective.

The Contractor shall implement the corrective action(s) as required
within the agreed time frame noted on the CAR.

In the event of a significant environmental incident the emergency
details in Element 5 of this EIMP shall be followed.

 

 

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4.8 Element 3: Effluent Irrigation Areas
RATIONALE: Effluent irrigation will result in the release of contaminants to soils
and may result in the release of contaminants to groundwater.

Management measures are required to ensure no significant impacts

occur to soils or groundwater within the irrigation areas and the

receiving environment.
OBJECTIVE: To manage irrigation areas to maintain soil and groundwater quality
and prevent soil erosion.
TASKS/ e A measurement of the soil moisture content of soils within the
ACTIONS: irrigation areas shall be undertaken prior to the application of
treated effluent. Irrigation shall be limited to that which is
sufficient to wet the soil to its undrained limit to prevent effluent
runoff or ponding.

e Soil structure shall be maintained to optimise infiltration and
permeability as indicated by monitoring.

e Application of effluent to the irrigation area shall cease whenever
there is rainfall on the irrigation area. Re-application shall be
restricted until soil moisture levels are below the undrained upper
limit for the soil.

e Should ponding or runoff of effluent occur within the irrigation
areas, effluent irrigation to that area shall cease immediately.

e The irrigation area shall be maintained in a well-grassed state
with a minimum of 95% vegetation cover at all times. Where
necessary, turf, pasture grass or trees shall be replaced to
maintain the vegetative cover.

e Corrective actions shall be undertaken if the vegetation within
the irrigation area is determined to be visibly degraded.

e Use of nitrogen fertiliser within irrigation areas shall be limited
and applied only as required. Nitrogen deficiency shall be
indicated by vegetation monitoring. Use of phosphorus based
fertiliser shall be restricted.

e Stormwater diversion infrastructure shall be installed around the
irrigation area. Erosion control measures shall be installed on
areas of exposed soils.

e A vegetated bund shall be installed at the southeastern boundary
of the irrigation area to detain pooled effluent during super-
irrigation.

PERFORMANCE | Degradation of soil quality within irrigation areas shall indicate non-
INDICATORS: compliance with this EIMP.

Degradation of water quality within receiving environments shall

indicate non-compliance with this EIMP.

Visible areas of soil erosion within irrigation areas shall indicate non-

compliance with this EIMP.

MONITORING: Soil conditions shall be monitored at nominated sampling locations
within each of the irrigation sites. Samples from representative sites
within the irrigation areas shall be collected from each of the topsoil

 

 

 

 

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EFFLUENT IRRIGATION MANAGEMENT PLAN - STAGE 1
NOOSA NORTH SHORE ECO-TOURISM PORTAL C Cardno

 

 

and sub-soil strata every two years.

Soils monitoring shall include analysis of soil pH, Sodium Adsorption
Ratio, Calcium/Magnesium Ratio, Exchangeable Cations, Total
Cations, Electrical Conductivity, Nitrogen, Phosphorous, Calcium,
Magnesium, Chloride and Sodium. Gypsum/lime shall be applied to
soils as indicated by the results of soil monitoring and analysis.

Baseline monitoring of groundwater quality shall be undertaken
quarterly for one year prior to the commencement of construction.

Monitoring of groundwater quality shall be undertaken quarterly
during construction and for 2 years after construction works and
annually thereafter or as specified by the conditions of the
development approval. Groundwater monitoring points shall be
established up-gradient and down-gradient of the STP, the effluent
storage lagoon and the irrigation area.

Groundwater monitoring shall include analysis of pH, Electrical
conductivity, Total dissolved solids, Biochemical oxygen demand,
Sodium, Salinity, Chloride, Sulfate, Alkalinity, Nitrate and Nitrite,
Ammonia, Total Nitrogen, Total Phosphorous and Faecal coliforms.

Groundwater depths shall be determined quarterly during
construction and for two years following construction and annually
thereafter.

Surface water quality monitoring shall be undertaken of runoff from
irrigation areas where there is a minimum of 30 mm rainfall in the
preceding 24 hours sufficient to cause runoff from the irrigation area.

Surface water monitoring shall include two event samples of runoff
from the irrigation areas collected annually, and analysed for pH,
Total Nitrogen, Total Phosphorus, EC, and Faecal Coliforms.

Monthly monitoring shall include a visual inspection of the condition
of the vegetation and evidence of soil erosion within irrigation areas.

Regular inspection of the stormwater diversion infrastructure around
the irrigation area shall be undertaken on a weekly basis.

 

REPORTING/
RECORDING:

Operators shall submit monthly reports to Council during
construction and establishment phases providing details of all
monitoring results, environmental incidents and emergencies and
corrective actions undertaken.

Accurate records shall be maintained of all monitoring results. These
monitoring results shall be forwarded to the EPA as part of the
annual report.

Any signs of soil erosion or deterioration of vegetation health shall be
noted and appropriate corrective actions taken and recorded.

 

 

CORRECTIVE
ACTION:

 

 

Should there be non-compliance with the stated performance

indicator the following corrective actions are to be implemented.

e Identification of the cause of the non-compliance;

e Implementation of appropriate mitigation measures as
determined by the Contractor in consultation with the Principal;
and

e Relevant validation monitoring to confirm that the nominated
corrective actions have been effective.

The Contractor shall implement the corrective action(s) as required

 

 

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EFFLUENT IRRIGATION MANAGEMENT PLAN - STAGE 1 } »
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within the agreed time frame noted on the CAR.

In the event of a significant environmental incident the emergency
details in Element 5 of this EIMP shall be followed.

 

 

 

 

 

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EFFLUENT IRRIGATION MANAGEMENT PLAN - STAGE 1 >
NOOSA NORTH SHORE ECO-TOURISM PORTAL C y Cardno

 

4.9 Element 4: Contingency Management

 

RATIONALE:

The operation of the STP and effluent irrigation scheme has the
potential to result in contingency situations such as the uncontrolled
release of effluent. Contingency procedures are required to provide
for effective management of these situations.

 

 

 

 

OBJECTIVE: To prevent degradation of the receiving environment.
To prevent the risk of health impacts on the public.

TASKS/ Minor Effluent Spill

ACTIONS:

Should a minor effluent spill occur during the operation of the
facilities the following response procedure shall be implemented.

1) An assessment of the size and origin of the spill is to be made
by the Operator.

2) Actions shall be taken to safely stop further release of effluent
from the process train. Actions may include the isolation of
valves or pumps within the process train.

3) Actions shall be taken to safely contain the spilled effluent and
prevent the release of the effluent to the receiving environment.
Actions may include, for example, the use of sandbags or earth
bunding to aid in containing the effluent.

4) Actions shall be taken to safely pump any captured effluent
back into the balancing influent tank for treatment.

5) An assessment shall be made of the size of the spill and of the
requirement to notify the EPA.

Major Effluent Spill

Should a major effluent spill occur during the operation of the
facilities the following response procedure shall be implemented.

1) An assessment of the size and origin of the spill is to be made
by the operator.

2) — If itis possible, actions shall be taken to safely stop any further
release of effluent from the process train.

3) Actions shall be taken to notify the EPA of the effluent spill and
an emergency spill response shall be co-ordinated in
conjunction with the EPA.

4) Actions shall be taken to safely contain the effluent if this is
possible. Actions may include, for example, the use of
sandbags or earth bunding to aid in containing the effluent.

5) Cleanup of the site shall be undertaken as quickly as is
practicable and appropriate actions shall be taken as
instructed by the EPA.

Community Complaints

The Principal shall implement the following procedure should a
community complaint be received, which relates directly to the
operation of the STP and irrigation scheme.

 

 

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Page 21

EFFLUENT IRRIGATION MANAGEMENT PLAN - STAGE 1
NOOSA NORTH SHORE ECO-TOURISM PORTAL qC Cardno

 

 

1) | Complete a Complaint register form.

2) The Principal shall determine if the complaint is valid and if
further action is required.

3) The Principal shall determine whether notification to the EPA
is required.

4) — The complainant shall be notified within 24 hours advising of
actions that will be taken.

5) If the issue cannot be investigated and finalised within 24
hours, then information regarding the preliminary assessment
of the complaint and a date when a full response will be
available shall be provided within 24 hours.

6) | The complaint response must be signed off by the Principal
indicating that it has been dealt with satisfactorily.

Should the investigation of a complaint reveal a non-conformance
with the requirements of the EPA, then a non-conformance is to be
raised and the corrective action process initiated.

Environmental Incident

The Principal shall make an assessment of any events that may be
considered an environmental incident.

The Principal shall notify the EPA of any incidents that have caused
environmental harm.

An Environmental Incident Form shall be completed for any
environmental incidents.

All environmental incidents shall be classified as non-conformances
and corrective action initiated.

Variations in Groundwater Quality

In the event that variations in groundwater quality are greater than
10% of the established baseline levels, further investigations shall be
undertaken by a suitably qualified consultant in consultation with
Council and the EPA to determine the source of contamination and
the requirements for remedial actions.

 

 

 

 

MONITORING: This EIMP element shall be continually reviewed and maintained to
ensure that the best possible contingency situation management
procedures are in place.

REPORTING: Operators shall submit monthly reports to Council during construction

and establishment phases providing details of any environmental
incidents and emergencies and corrective actions undertaken.

The Principal shall report any emergency situations to the EPA as
soon as is practicable after the emergency situation occurs.

 

 

Petrac Leisure NNS-S Pty Ltd

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Page 22

EFFLUENT IRRIGATION MANAGEMENT PLAN - STAGE 1 I )
NOOSA NORTH SHORE ECO-TOURISM PORTAL Cc Cardno

 

 

CORRECTIVE
ACTION:

 

 

Should there be non-compliance with the stated performance
indicator the following corrective actions are to be implemented.

e Identification of the cause of the non-compliance;

e Implementation of appropriate mitigation measures as
determined by the Operator in consultation with the Principal;
and

e Relevant validation monitoring to confirm that the nominated

corrective actions have been effective.

The Operator shall implement the corrective action(s) as required
within the agreed time frame noted on the CAR.

 

 

Petrac Leisure NNS-S Pty Ltd

Version 2 17 July 2006

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Page 23

EFFLUENT IRRIGATION MANAGEMENT PLAN - STAGE 4 »
NOOSA NORTH SHORE ECO-TOURISM PORTAL q Cardno

 

FIGURES

Figure 1 Proposed STP, Wet Weather Storage and Irrigation Areas

Figure 2 Monitoring Locations

 

Petrac Leisure NNS-S Pty Ltd Version 2 17 July 2006
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Page 24

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