Emission estimation calculators, booklet 1: chapter 6


Crushed Stone Processing

Crushed stone processing results in release of Criteria Air Contaminants (Part 4 Substances).

Download spreadsheet calculator: Crushed Stone Processing [xls 56kb] (4 Feb 2009)

Suggested estimation methodology: Emissions Factor

The equation for emissions estimation is:

E = (A x EF)/1000

where:

  • E = emissions
  • A = activity rate
  • EF = emissions factor

Then the total emissions for each of Total Particulate Matter (TPM), Particulate Matter Less than or Equal to 10 micrometers (µm) (PM10) and Particulate Matter Less than or Equal to 2.5 µm (PM2.5) is calculated by summing all individual emissions calculation for each substance.

Input Data

A = Throughput processed (tonnes/year)

The amount of throughput is measured either in material processed or raw material processed. The tables below show which type of throughput is used for the calculation based on the process used to crush the stone and whether it is controlled or not.

Uncontrolled
Process Activity
Primary Crushing Material processed
Secondary Crushing Material processed
Tertiary Crushing Material processed
Fines Crushing Material processed
Screening Material processed
Fines Screening Material processed
Conveyor Transfer Point Raw material processed

Note: "Uncontrolled" refers to processing of material with a moisture content below 1.5%. Use Uncontrolled Process Throughput when the moisture content of the process material is <1.5 %.

Controlled
Process Activity
Primary Crushing Material processed
Secondary Crushing Material processed
Tertiary Crushing Material processed
Fines Crushing Material processed
Screening Material processed
Fines Screening Material processed
Conveyor Transfer Point Raw material processed

Note: "Controlled" refers to the processing of material, either naturally wet with a moisture content above 1.5% or moistened to 1.5% and above with wet suppression techniques. Use Controlled Process Throughput when the moisture content of the process material is ≥ 1.5 %.

Part 4 Criteria Air Contaminants Releases

Primary Crushing
Substance Emission Factor (EF)Footnote1 EF Units
TPM - Uncontrolled 0.0027 Kilograms (kg)/tonne
TPM - ControlledFootnote* 0.0006 kg/tonne
PM10 - Uncontrolled 0.0012 kg/tonne
PM10 - ControlledFootnote* 0.00027 kg/tonne
PM2.5 - Uncontrolled 0.0006 kg/tonne
PM2.5 - ControlledFootnote* 0.00005 kg/tonne
Secondary Crushing
Substance Emission Factor (EF)Footnote1 EF Units
TPM - Uncontrolled 0.0027 kg/tonne
TPM - ControlledFootnote* 0.0006 kg/tonne
PM10 - Uncontrolled 0.0012 kg/tonne
PM10 - ControlledFootnote* 0.00027 kg/tonne
PM2.5 - Uncontrolled 0.0006 kg/tonne
PM2.5 - ControlledFootnote* 0.00005 kg/tonne
Tertiary Crushing
Substance Emission Factor (EF)Footnote1 EF Units
TPM - Uncontrolled 0.0027 kg/tonne
TPM - ControlledFootnote* 0.0006 kg/tonne
PM10 - Uncontrolled 0.0012 kg/tonne
PM10 - ControlledFootnote* 0.00027 kg/tonne
PM2.5 - Uncontrolled 0.0006 kg/tonne
PM2.5 - ControlledFootnote* 0.00005 kg/tonne
Fines Crushing
Substance Emission Factor (EF)Footnote1 EF Units
TPM - Uncontrolled 0.0195 kg/tonne
TPM - ControlledFootnote* 0.0015 kg/tonne
PM10 - Uncontrolled 0.0075 kg/tonne
PM10 - ControlledFootnote* 0.0006 kg/tonne
PM2.5 - Uncontrolled No Data (ND) kg/tonne
PM2.5 - ControlledFootnote* 0.000035 kg/tonne
Screening
Substance Emission Factor (EF)Footnote1 EF Units
TPM - Uncontrolled 0.0125 kg/tonne
TPM - ControlledFootnote* 0.0011 kg/tonne
PM10 - Uncontrolled 0.0043 kg/tonne
PM10 - ControlledFootnote* 0.00037 kg/tonne
PM2.5 - Uncontrolled ND kg/tonne
PM2.5 - ControlledFootnote* 0.000025 kg/tonne
Fines Screening
Substance Emission Factor (EF)Footnote1 EF Units
TPM - Uncontrolled 0.15 kg/tonne
TPM - ControlledFootnote* 0.0018 kg/tonne
PM10 - Uncontrolled 0.036 kg/tonne
PM10 - ControlledFootnote* 0.0011 kg/tonne
PM2.5 - Uncontrolled ND kg/tonne
PM2.5 - ControlledFootnote* ND kg/tonne
Conveyor Transfer Point
Substance Emission Factor (EF)Footnote1 EF Units
TPM - Uncontrolled 0.0015 kg/tonne
TPM - ControlledFootnote* 0.00007 kg/tonne
PM10 - Uncontrolled 0.00055 kg/tonne
PM10 - ControlledFootnote* 2.30E-05 kg/tonne
PM2.5 - Uncontrolled ND kg/tonne
PM2.5 - ControlledFootnote* 6.50E-06 kg/tonne

Note on Emissions Factors

The default emission factors are used in the table above, however if you have a site specific emission factor you would prefer to use you may enter it in the emission factor column. If you choose to insert your own emission factor ensure that the units have been converted accordingly. 

The emission factors used in this spreadsheet are based on uncontrolled emissions. If you are using an emission control device you will have to adjust the emissions calculated by this spreadsheet according to the following formula:

Controlled Emissions = Uncontrolled emission x ((100 - control efficiency)/100)

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