AUTH-205577-V1
Cnr North Road and Pri
ce Street
(Private Bag 90116)
In
vercargill
Telephone (03)
211 5115
Fax No. (03) 211 5252
Southland Freephone No. 0800 76 88 45
Air Discharge Permit
Pursuant to Section 104B of the Resource Management Act 1991, a resource consent is hereby
granted by the Southland Regional Council (the "Council") to
Mataura Valley Milk Ltd (the “consent
holder”) of
P O Box 13466, Christchurch from
2 December 2008.
Please read this Consent carefully, and ensure that any staff or
contractors carrying out activities under this Consent on your behalf
are aware of all the conditions of the Consent.
Details of Permit
Purpose for which permit is granted:
To discharge odour and contaminants to air from a milk
processing plant and associated facilities
Location
- site locality
State Highway 1, McNab, Gore
- map reference
F45:000-509
- receiving environment
Air
- catchment
Mataura
Legal description of land at the site:
Port sections 5 - 8 & 11 - 15 and Section 10, Block XXVI,
Town of East Gore; Lots 1 & 2 DP 302422; and Lots 2 - 4 DP
6886.
Expiry date:
2 December 2028
History of Changes and Transfers:
Legal description and Conditions 1, 2, 3, 6, 8, 10, 11, 17 and 21 amended on 2 February 2018.
Schedule of Conditions
General Conditions
1.
(a)
This resource consent shall expire on 2 December 2028.
Environment Southland is the brand name of
the Southland Regional Council
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AUTH-205577-V1
(b)
The Consent Holder shall give the Consent Authority five (5) working days notice of the
date when the plant will commence processing milk.
(Note: Pursuant to Sections 123 and 124 of the Resource Management Act 1991, a new consent
will be required at the expiration of this consent. The application will be considered in accordance
with the plans in effect at that time, and the adverse effects of the proposed activity).
2.
This consent authorises discharges to air from the following sources:
(a)
a coal-fired boiler having a net energy output capacity of 18.5 megawatts;
(b)
a single milk powder drier;
(c)
a wastewater treatment plant for treating plant process effluent, including air emissions
from up to 40 pressure relief valves on the water and treated waterwater pipelines to
the Gore District Council’s services; and
(d)
associated processes as described in the application for consent dated 3 July 2008 and
variation application dated 15 November 2017.
3. (a)
There shall be no discharge of odour or particulate matter from the coal-fired boiler, the
milk processing plant or any associated activity that is offensive or objectionable to the
extent that it causes an adverse effect at or beyond the boundary of the property on
which the consent is exercised.
(b)
Where the discharge is from an air pressure release valve within 100m of a sensitive
receptor (i.e. dwelling, school, hospital etc), it shall be fitted with an odour mitigation
device that prevents odour effects occurring on that sensitive receptor.
4.
The processes resulting in discharges to air shall be operated and maintained using either the
emission control mechanisms as described in the application, or using processes which provide
at least an equivalent level of emission control. Details of any changes shall be included in the
Annual Environmental Report to the Southland Regional Council required under condition 18.
5.
Differential pressure sensors shall be installed to electronically monitor differential pressure
across all bag filters, and the differential pressure shall be continuously displayed in the
respective control rooms. Any change in differential pressure that may indicate bag filter
failure or malfunction shall be investigated immediately and resulting corrective actions shall
be recorded in the Annual Environment Report required under condition 19.
Coal-Fired Boiler Plant and Associated Facilities
6.
(a) The maximum coal burning rate shall be at an equivalent gross energy input of 91
gigajoules per hour.
(b) The steam production rate shall be automatically measured and recorded at all times
during boiler operation. The gross energy input to the boiler plant shall be
calculated based on the measured steam production rate and the method of calculation,
taking into account boiler efficiency, shall be provided in writing to the Southland
Regional Council. Records of steam output and gross energy input shall be provided to
the Southland Regional Council in accordance with conditions 16 and 19.
7.
Combustion gases from the boiler plant shall be discharged to air via bag filters or via other
emission control equipment as necessary to comply with condition 10.
8.
(a) The discharge to air from the boiler plant shall occur via a stack at a height of at least 68
metres above local ground level. The minimum efflux velocity of exhaust air from the
stack shall be 25 metres per second at the maximum continuous rating of the boiler.
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(b) The discharge to air shall occur at a height at least 28 metres above the roof ridgeline of
all buildings on the consent holder’s property.
(c) The discharge shall be directed vertically into air and shall not be impeded by any
obstruction above the stack that decreases the vertical efflux velocity below that which
would occur in the absence of such obstruction.
9.
The opacity of emissions from the chimney stack shall not be darker than Ringelmann Shade 1
as described in New Zealand Standard 5201:1973 except:
(a) in the case of a cold start for a period not exceeding 30 minutes in the first hour of
operation;
(b) for a period not exceeding a total of two minutes in each succeeding hour of operation.
10. The discharge of total suspended particulate matter in combustion gases to air from the boiler
stack shall not:
(a) exceed a concentration of total suspended particulate matter, unless the bag filter (or
other equipment providing an equivalent degree of emission control) is being lawfully
bypassed in accordance with Condition 10(b), of 40 milligrams per cubic metre corrected
to 0 degrees Celsius, 101.3 kilopascals, and adjusted to 12 percent carbon dioxide by
volume on a dry gas basis. The mass emission rate shall not exceed 2.33 kilograms per
hour;
(b) exceed a concentration of total suspended particulate matter of 250 milligrams per cubic
metre corrected to 0 degrees Celsius, 101.3 kilopascals, and adjusted to 12 percent
carbon dioxide by volume on a dry gas basis when the bag filter (or other equipment
providing an equivalent degree of emission control) bypass is being operated under the
following circumstances for the shortest time practicable:
(i)
in the event of flue gas temperatures sufficiently high to damage filter bags or
other control equipment but only after boiler fuelling is stopped;
(ii) drying out green refractory during commissioning of the boiler following repairs to
boiler refractory, and during subsequent re-bricking, and only up to five days from
commencing drying out;
(iii) during commissioning of the boiler if it is essential to bypass the bag filter or other
control equipment; and
(vi) in the event of bag filter or other control equipment malfunction providing the
bypass shall not occur for more than eight hours at any time.
The dates and times the bag filter or other control equipment is bypassed, and the reasons for
bypassing, shall be recorded, and records shall be retained and made available to the
Southland Regional Council on request, and shall be included as a part of the Annual
Environmental Report required under condition 19.
11. (a) The maximum sulphur dioxide discharge rate shall not exceed 66 kilograms per hour at
maximum boiler output. The sulphur dioxide discharge rate shall be calculated from the
burning rate of the coal blend used at maximum boiler capacity and the sulphur content
of that coal blend determined according to Condition 11(b), allowing for a maximum 10
percent sulphur retention in the ash. Records shall be kept of the coal blend burned in
the boiler, including average gross calorific value and sulphur content by weight, and the
calculated maximum sulphur dioxide emission rate based on that information. These
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AUTH-205577-V1
records shall be provided to the Southland Regional Council in accordance with condition
19.
(b) Analysis of coal to be burned in the boiler shall be undertaken at least once every three
months, providing the coal source or blend remains constant. If the coal source or blend
changes then a representative analysis of the sulphur content shall be carried out as
soon as practicable and within not less than five working days of beginning to burn the
new coal. Each single sample to be analysed for coal sulphur shall be generated from
sub-samples that are randomly selected from supplied coal or from coal that is stored
on-site as the case may be. All coal samples required under this consent shall be analysed
as soon as practicable for combustible sulphur as percent by weight of coal and gross
calorific value as megajoules per kilogram of coal, on an as received basis, by a laboratory
accredited by IANZ for these analyses. These data shall be provided to Southland
Regional Council in accordance with condition 19 and otherwise on request.
12. (a) The concentration of total suspended particulate matter, and the concentration of
sulphur dioxide, in combustion gas in the boiler stack or the duct into the boiler stack
shall be measured within three months of the commencement of boiler operation and
thereafter at least once every 12 months. Measurement of the discharge from the boiler
shall occur when the boiler is operating at a rate of at least 60 percent of the maximum
continuous rating. Testing, and analysis of samples as appropriate, shall be carried out by
an organisation and by a laboratory accredited by International Accreditation New
Zealand (IANZ) for the tests and analyses involved.
(b) The consent holder shall install sampling ports in the boiler stack or the duct into the
boiler stack as appropriate in accordance with Australian Standard AS4323.1-1995 or
equivalent method for the provision and location of sampling ports, services, platforms
and access as well as provision of single phase electrical supply.
(c) The method of sampling and analysis for total particulate matter shall comply with US
Environmental Protection Agency (USEPA) Methods 5 or Method 17, or ISO 9096:2003,
ASTM D3685-98, or equivalent method to the satisfaction of the Southland Regional
Council. The testing time for each particulate sample shall be two hours continuous, and
at least three samples shall be collected. Results shall be adjusted to zero degrees
Celsius, 101.3 kilopascals, and 12 percent carbon dioxide on a dry gas basis, and as a
mass emission expressed as kilograms per hour.
(d) The method of sampling and analysis for sulphur dioxide shall be USEPA Method 6, 6A, or
6C, or an equivalent method to the satisfaction of the Southland Regional Council. The
testing time for each sulphur dioxide sample shall be one hour continuous and at least
three samples shall be collected. Results shall be adjusted to zero degrees Celsius, 101.3
kilopascals, and 12 percent carbon dioxide on a dry gas basis, and as a mass emission
expressed as kilograms per hour.
(e)
Volumetric flow of combustion gas, and gas temperature, during each particulate and
sulphur dioxide emission test shall be determined and recorded and results presented as
a part of the particulate emission test report.
(f)
The oxygen or carbon dioxide concentration in combustion gases shall be continuously
monitored and recorded during each particulate and sulphur dioxide emission test and
results shall be presented as a part of the particulate emission test report.
(g) The following operating parameters of the boiler during each particulate and sulphur
dioxide emission test shall be obtained and included in the testing report:
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furnace temperature;
furnace back-end oxygen concentration (wet gas or dry gas basis identified);
rate of firing (coal consumption per unit time and steaming rate); and
any abnormal operation during the testing period.
The results of emissions tests and other information and a description of the testing methods
used shall be provided to the Southland Regional Council within 20 working days following
receipt by the consent holder of the testing report. A summary of the results and other
information shall also be included in the Annual Environmental Report required under
condition 19.
13. The coal-fired boiler shall be serviced at least once every year by a person competent in the
servicing of such boilers. This servicing shall include internal cleaning and replacement or repair
of damaged equipment and services as necessary; adjustment of the air to fuel ratio to
optimise energy efficiency and to minimise the emission of products of incomplete
combustion; and calibration and adjustment of boiler monitoring equipment consistent with
the intent of this consent. Servicing reports shall be prepared and copies shall be provided to
the Southland Regional Council on request. Confirmation that this servicing has been
undertaken, and at least a summary of the service reports shall be reported to the Southland
Regional Council in the Annual Environmental Report required under condition 19.
14. An obscuration meter shall be installed and operated in accordance with the supplier’s
instructions to provide continuous measurement and recording of obscuration of the
discharge. The meter shall be maintained and calibrated by a competent person such that a
reliable indication of plume opacity is achieved at all times. Boiler operators shall take into
account obscuration meter readings when determining ongoing compliance with condition (9).
A record of obscuration measurements shall be held on site and shall be provided to the
Southland Regional Council on request.
15. Fugitive dust from the coal delivered, stored and used on site shall be minimised by all
practicable means, which shall include unloading coal within an appropriately enclosed facility
and storage of coal in an enclosed environment.
16. The tonnage of coal burned per month, and the average and maximum one hour and 24-hour
coal consumption and gross energy input rates, shall be calculated each month based on
recorded steam production rates. This information shall be summarised in the Annual
Environmental Report required under condition 19.
Milk Powder Plant
17. (a) Discharges to air from two milk powder drier stacks shall be via cyclones and bag filters
discharging through vertical stacks without impediment with minimum height above
ground level (including building height) of 40 metres, with the actual stack height being
no less than 4 metres above the roof ridgeline of all buildings (excluding the boiler stack)
on the consent holder’s property. The minimum efflux velocity of exhaust air from each
drier stack shall be 14 metres per second at the maximum continuous rating of the drier.
The concentration of total suspended particulate in the exhaust air from both drier
stacks shall not exceed 15 milligrams per cubic metre corrected to 0 degrees Celsius,
101.3 kilopascals, on a dry gas basis. The total emission rate of suspended particulate
matter fromboth drier stacks shall not exceed 1.5 kilograms per hour.
(b)
The consent holder shall install sampling port(s) in the drier stack in accordance with
Australian Standard AS4323.1-1995 or equivalent method for the provision and location
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of sampling ports, services, platforms and access as well as provision of single phase
electrical supply.
(c)
The concentration and emission rate of total suspended particulate matter in the drier
stack exhaust air shall be measured within four months after completing commissioning
of the plant and thereafter at least every twelve months to confirm compliance with
condition 17(a). Measurement of the discharge from the stack shall occur when the plant
is operating at least 75 percent of its maximum continuous rating. Testing, and analysis
of samples as appropriate, shall be carried out by an organisation and by a laboratory
accredited by IANZ for the tests and analyses involved.
(d)
The method of sampling and analysis for total particulate matter shall comply with US
Environmental Protection Agency (USEPA) Methods 5 or Method 17, ISO 9096:2003 or
ASTM D3685-98, or a similar method to the satisfaction of the Southland Regional
Council. The testing time for each sample shall be two hours continuous, and at least
three samples shall be collected. Results shall be adjusted to zero degrees Celsius, 101.3
kilopascals, on a dry gas basis, and as a mass emission from each stack expressed as
kilograms per hour.
(e)
The volumetric flow and temperature in the drier stack shall be determined and
recorded and results presented as a part of the particulate emission test report.
(f)
The results of emissions tests and other information and a description of the testing
methods used shall be provided to the Southland Regional Council within 20 working
days following receipt by the consent holder of the testing report. A summary of the
results and other information shall be included the Annual Environmental Report
required under condition 19.
Reporting
18. A record of all complaints made to the consent holder relating to odour or particulate matter
shall be maintained, and shall include:
(a) the location where the odour or particulate matter was detected by the complainant;
(b)
the date and time when the odour or particulate matter was detected;
(c) a description of the wind speed and wind direction, and rainfall if any, when the odour or
particulate matter was detected by the complainant;
(d) the most likely cause of the odour or particulate matter detected; and
(e) any corrective action undertaken by the consent holder to avoid, remedy or mitigate the
odour or particulate matter detected by the complainant.
The record of complaints shall be provided to the Southland Regional Council on request, and
as part of the Annual Environmental Report required under condition 19.
19. The consent holder shall, no later than 30 September of each year, provide an Annual
Environmental Report to the Southland Regional Council setting out all monitoring and
reporting results required by conditions of consent and their interpretation by an appropriately
qualified person, including emission tests undertaken in relation to this consent over the
previous period. Where the result of any test or monitoring undertaken in relation to this
consent exceeds the relevant limit or does not comply with the relevant condition, then the
steps that were taken to rectify the non-compliance shall be provided.
Meteorological Monitoring
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20. The consent holder shall install a meteorological station at a representative location
determined in consultation with the Southland Regional Council. The meteorological
parameters to be measured and the equipment specification shall, at a minimum, be those
specified in the following table:
Heading
Resolution
Accuracy
Start up
Other Requirements
Wind speed
0.1 m/s
+/- 0.2 m/s
0.2 m/s
Measured 10m above
ground level
Wind Direction
1 degree
+/- 2 degrees
Referenced to True north
Air Temperature
0.1 degree C
+/- 0.2 degrees C
Measured at 10m and at
1.3m above ground level
Averaging Time & Averaging time 10 minutes for each parameter. A suitable data logging
Data Logging
system appropriate for the circumstances capably of down loading to a
personal computer or equivalent processor equipped with meteorological
data processing software.
All processed data shall be archived and made available to the Southland Regional Council on
request.
Management & Contingency Plan
21. The consent holder shall prepare, through the services of an independent appropriately
qualified person(s), an “Air Discharge Management & Contingency Plan” (the Plan). The
purpose of the Plan shall be to:
(a) describe the operation of the plant in relation to its potential impacts on the air
environment;
(b) define the actions to be taken to ensure compliance with all conditions of this consent,
or in response to any incident which may impact adversely on the environment;
(c) describe how representative samples of coal will be taken to give a composite sample for
analysis; and
(d) present contingency plans in the event of mechanical or electrical or other problems that
provide for continuing operation of processes and/or timely shutting down of processes
as the case may be, to ensure conditions of this consent are not breached.
The Plan shall include details of the steps to be taken to correct any non-compliances
identified. The plan shall be provided to the Southland Regional Council within three months of
the date notified in accordance with Condition 1(b). The Plan should be reviewed at least on an
annual basis and it may be amended at any time during the period of this consent as the
independent qualified person(s) considers appropriate to improve management and
contingency procedures. If/when the Plan is amended, a copy of the amended version, (or
amended sections) shall be sent to the Southland Regional Council as soon as practicable
following amendment. Amendments to the Plan shall be referenced in the Annual
Environmental Report required under Condition 19.
Review of Consent and Annual Charges
22. The Southland Regional Council may, in the months of May or November each year, serve
notice of its intention to review the conditions of this consent for the purposes of:
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(a)
dealing with any adverse effect on the environment which may arise from the exercise of
the consent and which it is appropriate to deal with at a later stage;
(b)
requiring the adoption of the best practicable option to remove or reduce any adverse
effect on the environment;
(c)
requiring the adoption of measures to reduce adverse effects of particulate matter
or
sulphur dioxide indicated by monitoring in accordance with
conditions
of
this
consent; and
(d)
modifying or extending any of the monitoring requirements of this consent.
23. The consent holder shall pay an annual administration and monitoring charge to the Southland
Regional Council, collected in accordance with Section 36 of the Resource Management Act.
Reissued2 February 2018 following amendments to the legal description and Conditions 1, 2, 3, 6, 8,
10, 11, 17 and 21 to address technical specifications for various parts of the proposed plant.
for the
Southland Regional Council
Michael Durand
Consents Manager