(1) In these regulations, unless the context otherwise requires,—

(2) In a formula used in these regulations, the symbols in the first column have the meaning set out in the second column, as follows:

(3) A reference to a test method containing an acronym listed in the first column in the following table means a standard, or test method related to an organisation, that is listed in the second column of the table:

(4) Unless the context otherwise requires, if a test method prescribed in these regulations provides for alternative methods, each method has equal standing, and any of the methods may be used.

(5) A unique emissions factor is in force for the purposes of these regulations if—

• (a) its use to calculate emissions has been approved by the EPA under section 91(1) of the Act; and

• (b) the approval has not ceased to have effect under section 91(2) of the Act.

In these regulations, unless the context otherwise requires, class,—

• (a) in relation to importing coal, means,—

  • (i) if there is no unique emissions factor in force in relation to the coal, a class of coal listed in the first column of table 1 of Schedule 2:

  • (ii) if a unique emissions factor is in force in relation to the coal, the class of coal to which the unique emissions factor relates:

• (b) in relation to mining coal and purchasing coal, means,—

  • (i) if there is no unique emissions factor in force in relation to the coal, a class of coal listed in the first column of table 2 of Schedule 2:

  • (ii) if a unique emissions factor is in force in relation to the coal, the class of coal to which the unique emissions factor relates:

• (c) in relation to importing natural gas, means any of the following:

  • (i) a class of natural gas listed in the first column of table 4 of Schedule 2:

  • (ii) a commercially produced blend of LPG with a propane content other than 60% by volume:

• (d) in relation to mining natural gas, means any of the following:

  • (i) a clearly defined stream of natural gas—

    • (A) whose properties are measured downstream of gas processing and prior to mixing with other streams of gas; and

    • (B) that passes through a single fiscal meter:

  • (ii) natural gas sent to the low temperature separation plant at Kapuni:

  • (iii) LPG:

  • (iv) propane:

  • (v) butane:

• (e) in relation to purchasing natural gas, means,—

  • (i) if there is no unique emissions factor in force in relation to the natural gas,—

    • (A) a class of natural gas listed in paragraph (d); or

    • (B) a class of natural gas defined by reference to the field at which it is mined as specified in table 10 of Schedule 2:

  • (ii) if a unique emissions factor is in force in relation to the natural gas, the class of natural gas to which the unique emissions factor relates:

• (f) in relation to geothermal fluid, means,—

  • (i) if there is no unique emissions factor in force in relation to the geothermal fluid, a class of geothermal fluid described in the first column of Part A or Part B of table 6 of Schedule 2:

  • (ii) if a unique emissions factor is in force in relation to the geothermal fluid, the class of geothermal fluid to which the unique emissions factor relates:

• (g) in relation to used oil, waste oil, used tyres, or waste, means,—

  • (i) if there is no unique emissions factor in force in relation to the used oil, waste oil, used tyres, or waste,—

    • (A)  a class of used oil, waste oil, used tyres or waste listed in the first column of table 7 of Schedule 2; or

    • (B) a subset of a class referred to in subsubparagraph (A), which is combusted in particular equipment:

  • (ii) if there is a unique emissions factor in force in relation to used oil, waste oil, used tyres, or waste, the class of used oil, waste oil, used tyres, or waste to which the unique emissions factor relates.

• (h) in relation to hydro fluorocarbons or per fluorocarbons, means—

  • (i) a refrigerant gas or mix described by reference to its ASHRAE designation and listed in the first column of table 2 of Schedule 2A; or

  • (ii) any other mix of constituents that—

    • (A) is not listed in the first column of table 2 of Schedule 2A; but

    • (B) contains a hydro fluorocarbon or per fluorocarbon listed in table 1 of Schedule 2A; or

  • (iii) if it is not mixed with other constituents, any hydro fluorocarbon or per fluorocarbon listed in table 1 of Schedule 2A:

• (i) in relation to synthetic greenhouse gases means—

  • (i) sulphur hexafluoride; or

  • (ii) a class of hydro fluorocarbons or per fluorocarbons specified in paragraph (h); or

  • (iii) a mix of sulphur hexafluoride and a class of hydro fluorocarbons or per fluorocarbons specified in paragraph (h).

(1) The EPA may, by notice in the Gazette, issue guidelines or standards in relation to the information required to be collected by these regulations.

(2) The EPA may, by notice in the Gazette, amend or revoke a guideline or standard.

(3) A participant who complies with a guideline or standard that is issued under this regulation, and is in force, is to be treated as complying with the requirements of these regulations to which the guideline or standard relates.

(1) A person must comply with regulations 7 and 8 if the person, in any year, is a participant under section 54(1)(a) of the Act in respect of the activity in Part 3 of Schedule 3 of the Act of importing coal.

(2) Regulations 7 and 8 apply in relation to coal only if the coal is imported by the person on or after 1 January 2010.

(1) The following information must be collected and recorded in relation to each class of coal for the year:

• (a) the total number of tonnes of the class of coal imported by the person in the year, as recorded at the customs point; and

• (b) the calorific value of the coal referred to in paragraph (a); and

• (c) the total number of tonnes of coal of the class exported by the person in the year, as recorded at the customs point; and

• (d) the calorific value of the coal referred to in paragraph (c).

(2) If the person wishes to include a stockpile adjustment in relation to a class of coal for the year under regulation 8(1), then the information specified in clause 3 of Schedule 1 must be collected and recorded.

(1) Emissions for the year in relation to each class of coal must be calculated in accordance with the following formula:

(1A) For the purposes of subclause (1), a person must include a stockpile adjustment if the emissions return is the final emissions return relating to the period ending on the date on which the name of the person is removed from the register of participants in respect of the activity of importing coal.

(2) An emissions return submitted by a person required to comply with this regulation must record the person’s total emissions from the activity of importing coal in the relevant year, calculated by adding together the emissions for each class of coal calculated under subclause (1).

(3) If a person who is required to comply with this regulation is required to submit an emissions return for a period other than a year, this regulation applies with any necessary modifications.

(1) A person must comply with regulations 10 and 11 if the person, in any year, is a participant under section 54(1)(a) of the Act in respect of the activity in Part 3 of Schedule 3 of the Act of mining coal where the volume of coal mined exceeds 2 000 tonnes in a year.

(2) Regulations 10 and 11 apply in relation to mined coal only if the coal is mined by the person on or after 1 January 2010.

(1) The following information must be collected and recorded in relation to each class of mined coal at each mining facility for the year:

• (a) the total number of tonnes of mined coal of the class sold by the person in the year (including for export) as recorded at the point of sale; and

• (b) the calorific value of the coal referred to in paragraph (a); and

• (ba) the total number of tonnes of mined coal of the class sold by the person in the year to each opt-in coal participant, as recorded at the point of sale; and

• (bb) the calorific value of the coal referred to in paragraph (ba); and

• (c) the total number of tonnes of mined coal of the class exported in the year, as recorded at the customs point; and

• (d) the calorific value of the coal referred to in paragraph (c); and

• (e) the total number of tonnes of mined coal of the class combusted by the person in the year; and

• (f) the calorific value of the coal referred to in paragraph (e); and

• (g) the total number of tonnes of mined coal of the class gifted or otherwise provided gratuitously to any person, including an employee, in the year; and

• (h) the calorific value of the coal referred to in paragraph (g).

(2) The following information must be collected and recorded in relation to all coal mined by the person in the year:

• (a) the total number of tonnes of coal mined from each category in the year; and

• (b) the total number of tonnes of methane flared, combusted for energy, or otherwise oxidised in the year.

(3) For the purposes of subclause (1)(ba) and regulation 11, mined coal sold to an opt-in coal participant includes coal that—

• (a) is sold by the person to any of the following related persons:

  • (i) a wholly owned subsidiary of the person:

  • (ii) a holding company of which the person is the wholly owned subsidiary:

  • (iii) a wholly owned subsidiary of a holding company of which the person is also a wholly owned subsidiary; and

• (b) is then on-sold by the related person to the opt-in participant.

(1) Emissions for the year in relation to each class of mined coal at each mining facility must be calculated in accordance with the following formula:

(2) Emissions for the year in relation to fugitive coal seam gas from each category of coal at each mining facility must be calculated in accordance with the following formula:

(3) An emissions return submitted by a person required to comply with this regulation must record the person’s total emissions from the activity of mining coal in the relevant year, calculated as follows:

(4) If a person who is required to comply with this regulation is required to submit an emissions return for a period other than a year, this regulation applies with any necessary modifications.

(1) Despite regulation 9, a person must comply with regulations 11B and 11C if the person, in any year, is a participant under section 54(1)(a) of the Act in respect of the activity in Part 3 of Schedule 3 of the Act of mining coal where—

• (a) the volume of coal mined exceeds 2 000 tonnes in a year; and

• (b) the coal is converted to gas via a UCG operation.

(2) Regulations 11B and 11C apply only in relation to coal that is converted to gas via a UCG operation by the person on or after 1 January 2011.

The following information must be collected and recorded in relation to each class of mined coal at each mining facility for the year that the coal is converted to gas via a UCG operation:

• (a) the total quantity, in tonnes, of the gas brought to the surface; and

• (b) the total mass fraction of carbon in the gas brought to the surface.

Emissions for the year in relation to each class of mined coal, at each mining facility, that is converted to gas via a UCG operation must be calculated in accordance with the following formula:

(1) A person must comply with regulations 13 and 14 if the person, in any year, is a participant under section 54(1)(a) of the Act in respect of the activity in Part 3 of Schedule 3 of the Act of importing natural gas where the volume of natural gas imported exceeds 10 000 litres in a year.

(2) Regulations 13 and 14 apply only if the natural gas is imported by the person on or after 1 January 2010.

(3) For the avoidance of doubt, a person who is required to comply with regulations 16 and 17 in relation to natural gas that is mined within the territorial limits of New Zealand, the exclusive economic zone, or in, on, or above the continental shelf, is not required to comply with regulations 13 and 14 in relation to the same natural gas.

(1) The following information must be collected and recorded in relation to each class of imported natural gas (other than LNG) for the year:

• (a) the total number of tonnes of natural gas of the class imported by the person in the year, as recorded at the customs point; and

• (b) the total number of tonnes of natural gas of the class exported by the person in the year, as recorded at the customs point.

(2) Information must also be collected and recorded about—

• (a) the total number of terajoules of LNG imported by the person in the year, as recorded at the customs point; and

• (b) the total number of terajoules of LNG exported by the person in the year, as recorded at the customs point.

(3) If the person wishes to include a storage adjustment in relation to LNG under regulation 14(4), then the following information must be collected and recorded:

• (a) the total number of terajoules of LNG injected into a gas storage facility by the person in the year; and

• (b) the total number of terajoules of LNG extracted from a gas storage facility by the person in the year.

(1) Emissions for the year in relation to each class of natural gas (other than LNG) must be calculated in accordance with the following formula:

(2) For the purposes of subclause (1), the emissions factor for a class of LPG with a propane content other than 60% by volume must be calculated as follows:

(3) Emissions for LNG for the year must be calculated in accordance with the following formula:

(4) For the purposes of subclause (3), a storage adjustment (if included) must be calculated as follows:

(5) Total emissions from the activity of importing natural gas for the year must be calculated as follows:

(6) If a person who is required to comply with this regulation is required to submit an emissions return for a period other than a year, this regulation applies with any necessary modifications.

(1) A person must comply with regulations 16 and 17 if the person, in any year, is a participant under section 54(1)(a) of the Act in respect of the activity in Part 3 of Schedule 3 of the Act of mining natural gas other than for export.

(2) Regulations 16 and 17 apply in relation to mined natural gas only if the natural gas is gas mined by the person on or after 1 January 2010.

(1) The following information must be collected and recorded in relation to mined natural gas for the year from each field, including (but not limited to) a field listed in table 10 in Schedule 2:

• (a) the total number of tonnes of mined natural gas of each class sold by the person in the year (including for export), as measured at the point of sale; and

• (b) the total number of tonnes of mined natural gas of each class exported by the person or a third party in the year, as recorded at the customs point; and

• (ba) the total number of tonnes of mined natural gas of each class sold by the person in the year to each opt-in natural gas participant, as measured at the point of sale; and

• (c) the total number of tonnes of mined natural gas combusted by the person for own use before the point of sale in the year; and

• (d) the total number of tonnes of mined natural gas flared by the person before the point of sale in the year, that are not recorded under paragraph (c); and

• (e) in respect of each of the quantities of mined natural gas referred to in paragraphs (a) to (d),—

  • (i) the mass fraction of carbon in the gas, as determined by reference to the results of the tests in subclause (3), or the accounting system referred to in subclause (4), as relevant; and

  • (ii) the total terajoules of the gas, as determined by reference to the results of the tests in subclause (3) or the accounting system referred to in subclause (4), as relevant.

(2) The following information must be collected and recorded in relation to natural gas that is vented by the person in the year from each field, including (but not limited to) a field listed listed in table 10 in Schedule 2:

• (a) the total number of tonnes of natural gas vented by the person before the point of sale in the year; and

• (b) in respect of the natural gas referred to in paragraph (a),—

  • (i) the mass fraction of carbon dioxide in the gas, as determined by the accounting system referred to in subclause (4); and

  • (ii) the mass fraction of methane in the gas, as determined by the accounting system referred to in subclause (4).

(2A) If, and to the extent that, the person combusts, flares, or vents mined natural gas for which there is no point of sale, subclause (1)(c) or (d) or (2)(a) applies as if “before the point of sale” were omitted.

(3) To obtain the information required by subclause (1)(e) in respect of the natural gas referred to in subclause (1)(a), (b), and (ba),—

• (a) the gas must be sampled with continuous monitoring equipment where available at least every 30 minutes, or, where this is not available, periodically with sufficient frequency to be representative of the information sought, but at least at intervals of not longer than 3 months, and in accordance with—

  • (i) GPA 2166:2005 (obtaining natural gas samples for analysis by gas chromatography, Parts 1–8); or

  • (ii) any equivalent standards or test methods related to an organisation that is listed in regulation 3(2) of the Climate Change (Unique Emissions Factors) Regulations 2009; and

• (b) the samples must be tested, by a person or laboratory that is accredited as complying with ISO 17025:2005 by International Accreditation New Zealand, an overseas accreditation agency with whom International Accreditation New Zealand has a mutual recognition agreement, or an overseas accreditation agency recognised under New Zealand’s mutual recognition arrangements, using gas chromatography in accordance with—

  • (i) ASTM D1945–03 (analysis of natural gas by gas chromatography); or

  • (ii) any equivalent standards or test methods related to an organisation that is listed in regulation 3(2) of the Climate Change (Unique Emissions Factors) Regulations 2009.

(4) To obtain the information required by subclause (1)(e) (in respect of the natural gas referred to in subclause (1)(c) and (d)) and subclause (2)(b) (in respect of the natural gas referred to in subclause (2)(a)), the person must use a hydrocarbon accounting system.

(5) For the purposes of subclause (1)(ba) and regulation 17, mined natural gas sold to an opt-in natural gas participant includes natural gas that—

• (a) is sold by the person to any of the following related persons:

  • (i) a wholly owned subsidiary of the person:

  • (ii) a holding company of which the person is the wholly owned subsidiary:

  • (iii) a wholly owned subsidiary of a holding company of which the person is also a wholly owned subsidiary; and

• (b) is then on-sold by the related person to the opt-in participant.

(6) In this regulation,—

• (a) third party means a person, other than an opt-in natural gas participant, who purchased the mined natural gas from the person required to comply with this regulation and regulation 17; and

• (b) the information required to be collected under subclause (1)(e) in relation to the quantity of mined natural gas of a class exported by the person or a third party in a year must be collected at the point of sale.

(1) Emissions for the year in relation to each field, including (but not limited to) a field listed in table 10 of Schedule 2, must be calculated by calculating the emissions from each of the following quantities of mined natural gas in accordance with the formula in subclause (2) and adding them together under subclause (4):

• (a) each class of mined natural gas from the field sold by the person in the year (including for export), as recorded under regulation 16(1)(a); and

• (b) each class of mined natural gas from the field exported by the person or a third party in the year, as recorded under regulation 16(1)(b); and

• (ba) each class of mined natural gas from the field sold by the person in the year to opt-in natural gas participants, as recorded under regulation 16(1)(ba); and

• (c) mined natural gas from the field combusted by the person for own use in the year, as recorded under regulation 16(1)(c); and

• (d) mined natural gas from the field flared by the person before the point of sale in the year, as recorded under regulation 16(1)(d).

(2) The formula for the calculation of emissions for each quantity of gas under subclause (1) is—

(3) Emissions in relation to venting from each field, including (but not limited to) a field listed in table 10 of Schedule 2, by the person in the year must be calculated in accordance with the following formula:

(4) Total emissions from each field for the year must be calculated as follows:

(5) An emissions return submitted by a person required to comply with this regulation must record the person's total emissions from the activity of mining natural gas other than for export, calculated by adding together the emissions from each field calculated under subclause (4).

(6) If a person who is required to comply with this regulation is required to submit an emissions return for a period other than a year, this regulation applies with any necessary modifications.

A person must comply with regulations 19 and 20 if the person, in any year, is a participant under section 54(1)(a) of the Act in respect of the activity in Part 3 of Schedule 3 of the Act of using geothermal fluid for the purpose of generating electricity or industrial heat.

(1) The following information must be collected and recorded in relation to each class of geothermal fluid used in the year for the purpose of generating electricity or industrial heat:

• (a) for a class referred to in Part A of table 6 of Schedule 2, or a class defined in a unique emissions factor approval that relates to a plant that uses, or makes a particular use of, geothermal steam, the total number of tonnes of geothermal production steam used by the person in the year; and

• (b) for a class referred to in Part B of table 6 of Schedule 2, or a class defined in a unique emissions factor approval by reference to a plant that uses, or makes a particular use of, geothermal fluid that does not relate to steam production, the total number of tonnes of 2-phase geothermal fluid used by the person in the year.

(2) For the purposes of subclause (1)(a), geothermal production steam used—

• (a) includes non-condensable gases and steam vented from system emergency vent facilities; but

• (b) does not include—

  • (i) fugitive steam released during well testing or well bleeding; or

  • (ii) steam released from the disposal of spent geothermal fluid; or

  • (iii) steam released from unused but maintained production wells.

(1) Emissions in relation to each class of geothermal fluid referred to in regulation 19(1)(a) that is used for the purpose of generating electricity or industrial heat by the person in the year must be calculated in accordance with the following formula:

(2) Emissions in relation to each class of geothermal fluid referred to in regulation 19(1)(b) used for the purpose of generating electricity or industrial heat by the person in the year must be calculated in accordance with the following formula:

(3) An emissions return submitted by a person who is required to comply with this regulation must record the person’s total emissions from the activity of using geothermal fluid for the purpose of generating electricity or industrial heat in the relevant year, calculated by adding together the emissions for each class of geothermal fluid used, as calculated under subclauses (1) and (2).

(4) If a person who is required to comply with this regulation is required to submit an emissions return for a period other than a year, this regulation applies with any necessary modifications.

(1) A person who in any year, is a participant under section 54(1)(a) of the Act in respect of the activity in Part 3 of Schedule 3 of the Act of combusting used oil, waste oil, used tyres, or waste for the purpose of generating electricity or industrial heat must—

• (a) collect and record information and calculate emissions in respect of each class of used oil, waste oil, used tyres, or municipal waste combusted by the person in the year in accordance with 1 of the following regulations:

  • (i) regulation 22 (standard method option 1):

  • (ii) regulation 23 (standard method option 2):

  • (iii) regulation 24 (continuous emissions monitoring method):

  • (iv) regulation 25 (periodic source testing method); and

• (b) comply with regulation 26.

(2) The person may—

• (a) use different methods for calculating emissions for different classes of used oil, waste oil, used tyres, or municipal waste; but

• (b) use the methods referred to in subclause (1)(a)(ii), (iii), and (iv) only if the class of used oil, waste oil, used tyres, or municipal waste is a class referred to in regulation 4(g)(i)(B) or a class referred to in regulation 4(g)(ii) that is defined by reference to being combusted in particular equipment.

(3) If the person is required to submit an emissions return for a period other than a year, subclause (1) and regulations 22 to 26 apply with any necessary modifications.

A person who wishes to use the standard method option 1 to calculate emissions from a class of used oil, waste oil, used tyres, or municipal waste, for a year must—

• (a) collect and record the following information:

  • (i) the total number of tonnes of the class of used or waste oil, used tyres, or municipal waste combusted by the person in the year, minus in the case of used or waste oil, the total number of tonnes of obligation fuel component of the used or waste oil; and

  • (ii) the calorific value of the used or waste oil, used tyres, or municipal waste referred to in paragraph (a); and

• (b) calculate emissions in relation to the class of used or waste oil, used tyres, or municipal waste as follows:

  E₁ = A × CV × EF

  where—

  A

  is the total number of tonnes of the class of used or waste oil, used tyres, or municipal waste combusted by the person in the year, as recorded under paragraph (a)(i)

  CV

  is the weighted average calorific value of the class of used or waste oil, used tyres, or municipal waste calculated by reference to the information recorded under paragraph (a)(ii)

  E₁

  is the emissions for the class of used or waste oil, used tyres, or municipal waste combusted in the year in tonnes

  EF

  is,—

  • (a) in relation to a class of used or waste oil, used tyres, or municipal waste for which no unique emissions factor is in force, the emissions factor for the class of used or waste oil, used tyres, or municipal waste from table 7 in Schedule 2:

  • (b) in relation to a class of used or waste oil, used tyres, or municipal waste for which a unique emissions factor is in force, the unique emissions factor.

A person who wishes to use the standard method option 2 to calculate emissions from a class of used oil, waste oil, used tyres, or municipal waste, for a year must—

• (a) collect and record the following information:

  • (i) the total energy output produced by the particular equipment through combusting the class of used or waste oil, used tyres, or municipal waste in the year expressed in terajoules; and

  • (ii) the estimated efficiency, on a gross energy basis, of the particular equipment over the year; and

  • (iii) if the class relates to used or waste oil,—

    • (A) the total number of tonnes of the obligation fuel component of the class of used or waste oil combusted by the person in the year; and

    • (B) the calorific value of the used or waste oil; and

• (b) calculate emissions from the class of used or waste oil, used tyres, or municipal waste as follows:

  E2

  =

  (

  D

  − B × CV)

  ×

  EF

  U

  where—

  B

  is,—

  • (a) if the class relates to used or waste oil, the total number of tonnes of the obligation fuel component of the used or waste oil of the class combusted by the person in the year, as recorded under paragraph (a)(iii)(A); and

  • (b) in every other case, zero

  CV

  is,—

  • (a) if the class relates to used or waste oil, the weighted average calorific value of the class of used or waste oil as calculated by reference to the information recorded under paragraph (a)(iii)(B); and

  • (b) in every other case, zero

  D

  is the total energy output produced by the particular equipment through its combustion of the class of used or waste oil, used tyres, or municipal waste in the year, as collected under paragraph (a)(i)

  E₂

  is the emissions for the class of used or waste oil, used tyres, or municipal waste combusted in the particular equipment in the year in tonnes

  EF

  is,—

  • (a) in relation to a class of used or waste oil, used tyres, or municipal waste for which no unique emissions factor is in force, the emissions factor for the class of used or waste oil, used tyres, or municipal waste from table 7 in Schedule 2:

  • (b) in relation to a class of used or waste oil, used tyres, or municipal waste for which a unique emissions factor is in force, the unique emissions factor

  U

  is the gross estimated efficiency of the particular equipment over the course of the year, as collected under paragraph (a)(ii).

(1) A person who wishes to use the continuous emissions monitoring method to calculate emissions from a class of used oil, waste oil, used tyres, or municipal waste must,—

• (a) using continuous monitoring equipment, at least every 30 minutes during the operation of the monitoring equipment,—

  • (i) measure in accordance with the procedures in ISO 10780:1994 or ISO 14164:1999 the volumetric flow rate for the stacks from which gases resulting from combustion of the class of used oil, waste oil, used tyres, or municipal waste are emitted; and

  • (ii) have tests to measure the CO₂, CH₄, and N₂O concentrations in the gas stream from the stacks carried out in accordance with one of the following standards by a person or laboratory that is accredited according to ISO 17025:2005 by International Accreditation New Zealand, an overseas accreditation agency with whom International Accreditation New Zealand has a mutual recognition agreement, or by an overseas accreditation agency recognised under New Zealand’s mutual recognition arrangements to carry out the tests:

    • (A) ISO 12039:2001:

    • (B) USEPA—Method 3A—2006:

    • (C) USEPA—Method 3C—1996 (modified, if used for N₂O):

    • (D) VDI 2649–1 (measurement of nitrous oxide):

    • (E) ASTM D6348–03 (determination of gaseous compounds); and

• (b) at the time of each of the measurements in paragraph (a), also measure and record—

  • (i) the pressure of the gas stream in kilopascals:

  • (ii) the temperature, in Kelvin, of the gas stream; and

• (c) using each set of data obtained under paragraphs (a) and (b), calculate the rate of emissions of CO₂, CH₄, and N₂O from the stacks at the time of measurement in accordance with the following formula:

  	mrgastype		=		mwgastype × P × F × C
  					R × T

  where—

  C

  is the concentration by volume of CO₂, CH₄, or N₂O, as the case may be, in the gas stream at the time of measurement

  F

  is the flow rate of the gas stream in cubic metres per second, at the time of measurement

  mr_gastype

  is the rate of each of CO₂, CH₄, and N₂O emitted in tonnes of gas type released per second

  mw_gastype

  is the molecular mass of CO₂, CH₄, or N₂O, as the case may be, in tonnes per kilomole, where—

  • (a) CO₂ and N₂O values are 0.044; and

  • (b) CH₄ value is 0.016

  P

  is the pressure of the gas stream in kilopascals at the time of measurement

  R

  is 8.314, the universal gas constant when expressed in J/K.mol; and

  T

  is the temperature, in Kelvin, of the gas at the time of measurement; and

• (d) using the results of the calculations under paragraph (c), estimate a representative rate of emissions for each mr_gastype per hour; and

• (e) estimate total emissions for the year of each of CO₂, CH₄, and N₂O in accordance with the following formula:

  E_{gastype year}= mr_{gastype hour} × t

  where—

  E_{gastype year}

  is the emissions for each of CO₂, CH₄, and N₂O emitted for the year in tonnes

  mr_{gastype hour}

  is the representative rate of each of CO₂, CH₄, and N₂O per hour for each hour of the year, as determined under paragraph (d)

  t

  is the number of hours that the equipment has operated in the year.

• (f) calculate the emissions for the class of used or waste oil, used tyres, or municipal waste in accordance with the following formula:

  E₃ = (E_{CO2 year} × G) + (E_{CH4 year} × 21) + (E_{N2O year} × 310)

  where—

  E₃

  is the emissions for the class of used or waste oil, used tyres, or municipal waste combusted in the particular equipment in the year in tonnes

  E_{gastype year}

  is the emissions of each of CO₂, CH₄ and N₂O for the year, as determined under paragraph (e)

  G

  is,—

  • (a) if the fuel combusted contains biomass, the representative non-biomass fraction of E_{CO2 year} determined in accordance with ASTM D6866–08; or

  • (b) in every other case, 1.

(2) For the purposes of the tests in subclause (1)(a) and(b),—

• (a) the relevant monitoring equipment must operate for more than 90% of the time period over which emissions are monitored (excluding any period during which the equipment is not in operation because it is being calibrated); and

• (b) if part of the monitoring equipment is not operating for a period, readings taken during periods when the equipment was operating may be used to estimate data on a pro rata basis for the period that the equipment was not operating; and

• (c) the calibration gases used in characterisation of the monitoring equipment must be certified by a person or laboratory accredited to ISO 34:2000 by International Accreditation New Zealand, an overseas accreditation agency with whom International Accreditation New Zealand has a mutual recognition agreement, or an overseas accreditation agency recognised under New Zealand’s mutual recognition arrangements, as being within 2% of the concentration specified on the cylinder label.

A person who wishes to use the periodic source testing method to calculate emissions from a class of used oil, waste oil, used tyres, or municipal waste must—

• (a) take the measurements and have the tests specified in regulation 24(1)(a) and (b) carried out over the period of a year at intervals that are sufficient to produce representative data that may be reliably extrapolated to provide estimates of emissions across the full range of operating conditions for that year; and

• (b) using each set of data obtained under paragraph (a), calculate the rate of emissions of CO₂, CH₄, and N₂O from the relevant stacks at the time of measurement in accordance with the formula in regulation 24(1)(c); and

• (c) estimate total tonnes of emissions for the year of each of CO₂, CH₄, and N₂O by reference to the results of the calculations under paragraph (b), the number of seconds during the year when the particular equipment was operating, and the full range of operating conditions for the year; and

• (d) estimate total tonnes of emissions for the class of used or waste oil, used tyres, or municipal waste, in accordance with the following formula:

  E₄ = (E_{CO2 year} × G) + (E_{CH4 year} × 21) + (E_{N2O year} × 310)

  where—

  E₄

  is the emissions for the class of used or waste oil, used tyres, or municipal waste combusted in the particular equipment in the year in tonnes

  E_{gastype year}

  is the emissions for each of CO₂, CH₄, and N₂O for the year as determined under paragraph (c)

  G

  is,—

  • (a) if the fuel combusted contains biomass, the representative non-biomass fraction of E_{CO2 year} determined in accordance with ASTM D6866–08; or

  • (b) in every other case, 1.

An emissions return submitted by a person who is required to comply with this regulation must record the person’s total emissions from the activity of combusting used oil, waste oil, used tyres, or municipal waste for the purpose of generating electricity or industrial heat in the relevant year calculated by adding together the emissions for each class of used or waste oil, used tyres, or municipal waste combusted in the year calculated under regulations 22 to 25.

A person who, in any year, is a participant under section 54(1)(a) of the Act in respect of the activity in Part 3 of Schedule 3 of the Act of combusting used oil, waste oil, used tyres, or waste for the purpose of generating electricity or industrial heat must—

• (a) collect and record information in respect of each class of industrial waste combusted by the person in the year in accordance with regulation 26B; and

• (b) calculate emissions in respect of each class of industrial waste combusted by the person in the year in accordance with regulation 26C.

The information that must be collected and recorded in relation to each class of industrial waste combusted in the year is the total quantity, in tonnes, of pure carbon in the industrial waste.

Emissions for the year in relation to each class of industrial waste must be calculated in accordance with the following formula:

A person must comply with regulations 28 and 29 if the person, in any year, is a participant under section 54(1)(a) of the Act in respect of the activity in Part 3 of Schedule 3 of the Act of refining petroleum where the refining involves the use of intermediate crude oil products for energy or feedstock purposes.

The following information must be collected and recorded in relation to intermediate crude oil products used for energy or feedstock purposes in petroleum refining in the year:

• (a) the total number of tonnes of refinery asphalt used for combustion by the person in the year; and

• (b) the total number of tonnes of refinery fuel oil used for combustion by the person in the year; and

• (c) the total number of tonnes of refinery fuel gas used for combustion by the person in the year; and

• (d) the total number of tonnes of CO₂ vented from manufacturing hydrogen by the person in the year, excluding CO₂ from obligation natural gas; and

• (e) the total number of tonnes of refinery flare gas used for combustion by the person in the year; and

• (f) the total number of tonnes of other intermediate crude oil products used for combustion or hydrogen manufacture by the person in the year.

(1) Emissions in relation to intermediate crude oil products used for energy or feedstock purposes in petroleum refining by the person in the year must be calculated in accordance with the following formula:

(2) If a person required to comply with this regulation is required to submit an emissions return for a period other than a year, this regulation applies with any necessary modifications.

A person must comply with regulations 31 and 32 if the person, in any year, is a participant under section 54(1)(a) of the Act in respect of the activity in subpart 1 of Part 4 of Schedule 3 of the Act of producing iron or steel.

The following information must be collected and recorded in relation to iron or steel produced:

• (a) the total number of tonnes of uncalcined limestone used by the person in the year, expressed as tonnes of pure calcium carbonate; and

• (b) the total number of tonnes of uncalcined dolomite used by the person in the year, expressed as tonnes of pure calcium magnesium carbonate; and

• (c) the total number of tonnes of carbon in each type of carbon-containing input (other than obligation coal, or limestone or dolomite collected under paragraphs (a) and (b)) used in processing up to but not including the tapping of hot metal by the person in the year, expressed as tonnes of pure carbon.

(1) Emissions in relation to iron or steel produced by the person in the year must be calculated in accordance with the following formula:

(2) If a person who is required to comply with this regulation is required to submit an emissions return for a period other than a year, this regulation applies with any necessary modifications.

A person must comply with regulations 34 and 35 if the person, in any year, is a participant under section 54(1)(a) of the Act in respect of the activity in subpart 1 of Part 4 of Schedule 3 of the Act of producing aluminium, resulting in the consumption of anodes or the production of anode effects.

The following information must be collected and recorded in relation to aluminium produced in the year:

• (a) the total number of tonnes of carbon dioxide resulting from baked anodes used by the person in the year, as calculated in accordance with the Aluminium Sector Greenhouse Gas Protocol; and

• (b) the total number of tonnes of carbon dioxide resulting from pitch volatiles used by the person in the year, as calculated in accordance with the Aluminium Sector Greenhouse Gas Protocol; and

• (c) the total number of tonnes of carbon dioxide resulting from packing material, other than obligation coal, used by the person in the year as calculated in accordance with the Aluminium Sector Greenhouse Gas Protocol; and

• (d) the total number of tonnes of hot metal aluminium produced by the person in the year; and

• (e) the anode effect minutes per cell-day (excluding non-steady state emissions and as defined in Appendix C of the Aluminium Sector Greenhouse Gas Protocol); and

• (f) the slope coefficient for C₂F₆ (in kg C₂F₆/tAl) and for CF₄ (in kg CF₄/tAl), as provided by the Aluminium Sector Greenhouse Gas Protocol.

(1) Emissions in relation to aluminium produced by the person in the year must be calculated in accordance with the following formula:

(2) If a person who is required to comply with this regulation is required to submit an emissions return for a period other than a year, this regulation applies with any necessary modifications.

A person must comply with regulations 37 and 38 if the person, in any year, is a participant under section 54(1)(a) of the Act in respect of the activity in subpart 1 of Part 4 of Schedule 3 of the Act of producing clinker or burnt lime, resulting in calcination of limestone, or calcium carbonates.

(1) The following information must be collected and recorded in relation to clinker and burnt lime produced in the year:

• (a) the total number of tonnes of pure calcium oxide in clinker or burnt lime products derived from calcium carbonate calcined in a cement or lime kiln by the person in the year; and

• (b) the total number of tonnes of pure magnesium oxide in clinker or burnt lime products derived from magnesium carbonate calcined in a cement or lime kiln by the person in the year and not recorded under paragraph (a); and

• (c) the total number of tonnes of calcium oxide or magnesium oxide in cement kiln dust or lime kiln dust produced by the person in the year, excluding any dust that is recycled into a cement or lime kiln.

(2) For the purposes of subclause (1)(a), up to 5% by weight of magnesium oxide, if present as an impurity, may be included and calculated as calcium oxide.

(1) Emissions in relation to clinker and burnt lime produced by the person in the year must be calculated in accordance with the following formula:

(2) If a person who is required to comply with this regulation is required to submit an emissions return for a period other than a year, this regulation applies with any necessary modifications.

A person must comply with regulations 40 and 41 if the person, in any year, is a participant under section 54(1)(a) of the Act in respect of the activity in subpart 1 of Part 4 of Schedule 3 of the Act of producing glass using soda ash.

The following information must be collected and recorded in relation to the glass produced in the year:

• (a) the total number of tonnes of soda ash used by the person in the year, expressed as tonnes of pure sodium carbonate; and

• (b) the total number of tonnes of uncalcined limestone used by the person in the year, expressed as tonnes of pure calcium carbonate; and

• (c) the total number of tonnes of uncalcined dolomite used by the person in the year, expressed as tonnes of pure calcium magnesium carbonate.

(1) Emissions in relation to the glass produced by the person in the year must be calculated in accordance with the following formula:

(2) If a person who is required to comply with this regulation is required to submit an emissions return for a period other than a year, this regulation applies with any necessary modifications.

A person must comply with regulations 43 and 44 if the person, in any year, is a participant under section 54(1)(a) of the Act in respect of the activity in subpart 1 of Part 4 of Schedule 3 of the Act of producing gold.

The following information must be collected and recorded in relation to gold produced in the year:

• (a) the total number of tonnes of uncalcined limestone reacted in use by the person in producing gold in the year, expressed as tonnes of pure calcium carbonate; and

• (b) the total number of tonnes of uncalcined dolomite reacted in use by the person in producing gold in the year, expressed as tonnes of pure calcium magnesium carbonate.

(1) Emissions in relation to the gold produced by the person in the year must be calculated in accordance with the following formula:

(2) If a person who is required to comply with this regulation is required to submit an emissions return for a period other than a year, this regulation applies with any necessary modifications.

A person must comply with regulations 44B to 44F if the person, in any year, is a participant under section 54(1)(a) of the Act in respect of the activity in subpart 2 of Part 4 of Schedule 3 of the Act of importing sulphur hexafluoride, including sulphur hexafluoride contained in goods.

(1) Information must be collected and recorded and emissions must be calculated in respect of imported sulphur hexafluoride—

• (a) in accordance with regulations 44C and 44D, if the sulphur hexafluoride is imported in bulk in the year:

• (b) in accordance with regulations 44E and 44F, if the sulphur hexafluoride is imported in pre-charged equipment.

(2) An emissions return for the activity must record the person's total emissions in the period covered by the return, calculated by adding together the emissions for—

• (a) sulphur hexafluoride imported in bulk by the person in the period, as calculated under regulation 44D; and

• (b) sulphur hexafluoride imported in pre-charged equipment by the person in the period, as calculated under regulation 44F.

The person must collect and record the total number of kilograms of sulphur hexafluoride imported in bulk by the person in the year.

(1) Emissions in relation to sulphur hexafluoride imported in bulk by the person in the year must be calculated in accordance with the following formula:

(2) If a person who is required to comply with this regulation is required to submit an emissions return for a period other than a year, this regulation applies with any necessary modifications.

The following information must be collected and recorded in relation to sulphur hexafluoride imported in pre-charged equipment in the year:

• (a) the total number of units of each type of pre-charged equipment containing sulphur hexafluoride imported by the person in the year that were not excluded goods, as recorded at the customs point; and

• (b) the sulphur hexafluoride charge in grams for the type of pre-charged equipment.

(1) Emissions in relation to sulphur hexafluoride imported in pre-charged equipment by the person in the year must be calculated in accordance with the following formula:

(2) If a person who is required to comply with this regulation is required to submit an emissions return for a period other than a year, this regulation applies with any necessary modifications.

A person must comply with regulations 44H to 44N if the person, in any year, is a participant in respect of the activity in subpart 2 of Part 4 of Schedule 3 of the Act of importing hydro fluorocarbons or per fluorocarbons, including hydro fluorocarbons or per fluorocarbons contained in goods.

(1) Information must be collected and recorded and emissions must be calculated in respect of imported hydro fluorocarbons or per fluorocarbons—

• (a) in accordance with regulations 44I and 44J, if the hydro fluorocarbons or per fluorocarbons are imported in bulk in the year; and

• (b) in accordance with regulations 44K and 44L, if the hydro fluorocarbons or per fluorocarbons are imported in pre-charged equipment in the year; and

• (c) in accordance with regulations 44M and 44N, if the hydro fluorocarbons or per fluorocarbons are imported in any refrigeration, air conditioning, or other system integrated into or powered by motor vehicles in the year.

(2) An emissions return for the activity must record the person's total emissions for the period covered by the return, calculated by adding together the emissions—

• (a) for each class of hydro fluorocarbons or per fluorocarbons—

  • (i) imported in bulk by the person in the period, as calculated under regulation 44J; and

  • (ii) imported in pre-charged equipment by the person in the year, as calculated under regulation 44L; and

• (b) for motor vehicles imported by the person in the period, as determined under regulation 44N.

The person must collect and record—

• (a) the constituents of each class of hydro fluorocarbons or per fluorocarbons imported in bulk by the person in the year; and

• (b) the total number of kilograms of each class of hydro fluorocarbons or per fluorocarbons imported in bulk by the person in the year, as recorded at the customs point.

(1) Emissions in relation to each class of hydro fluorocarbons or per fluorocarbons imported in bulk by the person in the year must be calculated in accordance with the following formula:

(2) If a person who is required to comply with this regulation is required to submit an emissions return for a period other than a year, this regulation applies with any necessary modifications.

The following information must be collected and recorded in relation to each class of hydro fluorocarbons or per fluorocarbons imported in pre-charged equipment in the year:

• (a) the constituents of the class of hydro fluorocarbons or per fluorocarbons; and

• (b) the total number of units of each type of pre-charged equipment containing the class of hydro fluorocarbons or per fluorocarbons imported by the person in the year that were not excluded goods, as recorded at the customs point; and

• (c) the hydro fluorocarbons or per fluorocarbons charge in grams for the type of pre-charged equipment.

(1) Emissions in relation to each class of hydro fluorocarbons or per fluorocarbons imported in pre-charged equipment by the person in the year must be calculated in accordance with the following formula:

(2) If a person who is required to comply with this regulation is required to submit an emissions return for a period other than a year, this regulation applies with any necessary modifications.

(1) If the person imports hydro fluorocarbons or per fluorocarbons contained in any refrigeration, air conditioning, or other system integrated into or powered by motor vehicles (other than excluded goods) in the year, the person may elect whether to collect information and calculate emissions in respect of the motor vehicles under—

• (a) subclause (2) and section 44N(1) (the actual charge method); or

• (b) subclause (3) and section 44N(2) (the default charge method); or

• (c) a combination of those provisions (that is, some vehicles in accordance with the actual charge method and others in accordance with the default charge method).

(2) The person must collect and record the following information in relation to each class of hydro fluorocarbons or per fluorocarbons contained in any refrigeration, air conditioning, or other system integrated into or powered by the motor vehicles in respect of which the person wishes to calculate emissions in accordance with the actual charge method:

• (a) the constituents of the class of hydro fluorocarbons or per fluorocarbons; and

• (b) the total number of each type of motor vehicle containing the class of hydro fluorocarbons or per fluorocarbons imported by the person in the year that were not excluded goods, as recorded at the customs point; and

• (c) the hydro fluorocarbons or per fluorocarbons charge in grams for the type of motor vehicle.

(3) The person must collect and record, for each category of motor vehicle in respect of which the person wishes to use the default charge method to calculate emissions from hydro fluorocarbons or per fluorocarbons in any refrigeration, air conditioning, or other systems integrated into or powered by the motor vehicles, the total number of motor vehicles in that category imported by the person in the year that were not excluded goods, as recorded at the customs point.

(1) A person who wishes to use the actual charge method to calculate emissions from any motor vehicles imported in the year must calculate emissions in relation to each class of hydro fluorocarbons or per fluorocarbons imported in those vehicles using the following formula:

(2) A person who wishes to use the default charge method to calculate emissions from any motor vehicles imported in the year must calculate emissions in relation to each category of those motor vehicles imported, using the following formula:

(3) The person must calculate total emissions in relation to hydro fluorocarbons or per fluorocarbons in motor vehicles imported by the person in the year using the following formula:

(4) The emissions that must be included in the person’s emissions return for the year is the greater of—

• (a) the figure determined under the following formula:

  TE − 100

  where—

  TE

  is the person’s total emissions for motor vehicles imported by the person in the year as calculated under subclause (3); and

  100

  is the tonnes of emissions from motor vehicles for which the person is entitled to an exemption under clause 15(3) of the Climate Change (General Exemptions) Order 2009; and

• (b) zero.

(5) If a person who is required to comply with this regulation is required to submit an emissions return for a period other than a year, this regulation applies with any necessary modifications.

A person must comply with regulations 44P and 44Q if the person, in any year, is a participant under section 54(1)(a) of the Act in respect of the activity in subpart 2 of Part 4 of Schedule 3 of the Act of manufacturing sulphur hexafluoride, hydro fluorocarbons, or per fluorocarbons, other than through producing aluminium resulting in the consumption of anodes or the production of anode effects.

The person must collect and record the following information in relation to each class of synthetic greenhouse gas and each facility at which synthetic greenhouse gases are manufactured by the person in the year (whether the gas is manufactured in bulk or as a by-product of another manufacturing process, other than aluminium production):

• (a) the constituents of the class of synthetic greenhouse gas; and

• (b) the total number of kilograms of the class of synthetic greenhouse gas manufactured at the facility in the year; and

• (c) the number of kilograms of the class of synthetic greenhouse gas emitted during manufacturing at the facility in the year; and

• (d) the number of kilograms of the class of synthetic greenhouse gas emitted during handling at the facility in the year.

(1) Emissions in relation to each class of synthetic greenhouse gas manufactured by the person in the year at each facility used by the person to manufacture a synthetic greenhouse gas (whether in bulk or as a by-product of another manufacturing process) must be calculated in accordance with the following formula:

(2) An emissions return submitted by a person required to comply with this regulation must record the person's total emissions from the manufacturing synthetic greenhouse gases activity in the year, calculated by adding together the emissions for each class of synthetic greenhouse gas manufactured at each facility in the year, as calculated under subclause (1).

(3) If a person who is required to comply with this regulation is required to submit an emissions return for a period other than a year, this regulation applies with any necessary modifications.

If a person is required to use a GWP figure for a class of synthetic greenhouse gas that contains more than 1 synthetic greenhouse gas and the GWP figure for the class of synthetic greenhouse gas is not listed in table 2 of Schedule 2A, then the GWP figure for the class of synthetic greenhouse gas must be calculated in accordance with the following formula:

(1) A person must comply with regulations 46 and 47 if the person, in any year, is a participant under section 54(1)(b) of the Act in respect of the activity in Part 4 of Schedule 4 of the Act of purchasing coal from 1 or more participants who mine coal where the total coal purchased exceeds 250 000 tonnes per year.

(2) Regulations 46 and 47 apply only if the purchased coal is coal mined—

• (a) on or after 1 January 2010; and

• (b) by a person who is required to comply with regulations 10 and 11.

(1) The following information must be collected and recorded in relation to each class of coal for the year:

• (a) the total number of tonnes of coal of the class purchased from each coal miner in the year, as recorded at the point of sale; and

• (b) the calorific value of the coal referred to in paragraph (a); and

• (c) the total number of tonnes of coal of the class purchased from a coal miner that are exported by the person in the year, as recorded at the customs point; and

• (d) the calorific value of the coal referred to in paragraph (c).

(2) If the person wishes to include a stockpile adjustment for the class of coal under regulation 47(1), then the person must also collect and record the information specified in clause 3 of Schedule 1.

(1) Emissions for the year in relation to each class of coal must be calculated in accordance with the following formula:

(1A) For the purposes of subclause (1), a person must include a stockpile adjustment if the emissions return is the final emissions return relating to the period ending on the date on which the name of the person is removed from the register of participants in respect of the activity of purchasing coal.

(2) An emissions return submitted by a person who is required to comply with this regulation must record the person’s total emissions from the activity of purchasing coal in the relevant year, calculated by adding together the emissions for each class of coal purchased calculated under subclause (1).

(3) If a person who is required to comply with this regulation is required to submit an emissions return for a period other than a year, this regulation applies with any necessary modifications.

(1) A person must comply with regulations 49 and 50 if the person, in any year, is a participant under section 54(1)(b) of the Act in respect of the activity in Part 4 of Schedule 4 of the Act of purchasing natural gas from 1 or more participants who mine natural gas where the total natural gas purchased exceeds 2 petajoules in a year.

(2) Regulations 49 and 50 apply only if the purchased natural gas (opt-in natural gas) is mined—

• (a) on or after 1 January 2010; and

• (b) by a person who is required to comply with regulations 16 and 17.

(1) The following information must be collected and recorded in relation to each class of opt-in natural gas for the year:

• (a) the total number of tonnes of opt-in natural gas of the class purchased by the person from each gas miner in the year, as measured at the point of sale; and

• (b) the total number of tonnes of opt-in natural gas of the class exported by the person in the year, as measured at the point of sale; and

• (c) in respect of each of the quantities of opt-in natural gas referred to in paragraphs (a) and (b) (other than LPG butane or propane),—

  • (i) the total terajoules of the natural gas, as determined in accordance with subclause (2); and

  • (ii) if the standard emissions calculation formula in clause 50(3) is intended to be used, the mass fraction of carbon in the natural gas, as determined by reference to the tests in subclause (2)(b).

(2) To obtain the information required by subclause (1)(c),—

• (a) the opt-in natural gas must be sampled with continuous monitoring equipment where available at least every 30 minutes, or where this is not available, periodically with sufficient frequency to be representative of the information sought, but at least at intervals of no more than 3 months, and in accordance with—

  • (i) GPA 2166:2005 (obtaining natural gas samples for analysis by gas chromatography, Parts 1–8); or

  • (ii) any equivalent standard or test method related to an organisation that is listed in regulation 3(2) of the Climate Change (Unique Emissions Factors) Regulations 2009; and

• (b) the samples must be tested, by a person or laboratory that is accredited as complying with ISO 17025:2005 by International Accreditation New Zealand, an overseas accreditation agency with whom International Accreditation New Zealand has a mutual recognition agreement, or an overseas accreditation agency recognised under New Zealand’s mutual recognition arrangements, using gas chromatography in accordance with—

  • (i) ASTM D1945–03 (analysis of natural gas by gas chromatography); or

  • (ii) any equivalent standard or test method related to an organisation that is listed in regulation 3(2) of the Climate Change (Unique Emissions Factors) Regulations 2009).

(3) In addition, for the purposes of the gas storage adjustment under regulation 50(7), the person must also collect and record the following information:

• (a) the total number of terajoules of opt-in natural gas injected in the year into a gas storage facility by or on behalf of the person; and

• (b) the total number of terajoules of opt-in natural gas extracted in the year from a gas storage facility by or on behalf of the person.

(4) In this regulation, gas storage facility means an underground feature or formation used for storing mined natural gas transferred from its original location for subsequent recovery, whether or not the underground feature or formation also contains natural gas that has not been mined.

(1) Emissions for the year in relation to each of the following quantities of opt-in natural gas must be calculated in accordance with either the standard formula in subclause (3) or the field specific formula in subclause (4):

• (a) each class of natural gas (other than LPG, propane, or butane) purchased by the person in the year; and

• (b) each class of natural gas (other than LPG, propane, or butane) exported by the person in the year.

(2) Emissions for the year in relation to each of the following quantities of natural gas must be calculated in accordance with the formula in subclause (5):

• (a) LPG, propane, or butane purchased by the person in the year; and

• (b) LPG, propane, or butane exported by the person in the year.

(3) The standard formula for the calculation of emissions under this regulation is—

(4) A person may calculate emissions for a class of opt-in natural gas under the following field specific formula, if the field is listed in table 10 in Schedule 2:

(5) Emissions for LPG, propane, or butane must be calculated in accordance with the following formula:

(6) For the purposes of subclause (5), the emissions factor for a class of LPG with a propane content other than 60% by volume, must be calculated as follows:

(7) Total emissions from the activity of purchasing natural gas for the year must be calculated as follows:

(8) If a person who is required to comply with this regulation is required to submit an emissions return for a period other than a year, this regulation applies with any necessary modifications.