NAIIS-User-Manual.Docx Page 50 07/08/2013 
 
3. Emission factors 
a. Ozone precursors and SO2 from oil refining – Crude oil throughput 
NOx = 0.06 
CO = 0.09 
NMVOC = 0.62 
SO2 = 0.93 
b. Ozone precursors and SO2 from oil refining – Catalytic cracker throughput 
NOx = 0.2 
CO = 42.6 
NMVOC = 0.6 
SO2 = 1.5 
c. NMVOC emissions from  storage and handling – Crude oil throughput 
Secondary seals = 0.2 
Primary seals = 0.7 
Fixed Roof = 4.9 
d. SO 2 from Sulphur Recovery Plants – 139 kg/t 
 
4. CKD correction factor  = 1.02 
 
5. Methane Correction Factor (MCF) 
Managed — 1.0 
Unmanaged – deep (>= 5m) — 0.8 
Unmanaged – shallow (< 5m) — 0.4 
Methane Correction Factor — 0.6 
 
6. Inventory time period (for Cropland remaining Cropland – Carbon stock change – Mineral soils) = 
20 years