Operational Eco-Efficiency


Management Approach

Operational Efficiency & Management System Roadmap 2017 – 2022 was initiated to improve IRPC’s operational performance including energy efficiency that leads to less consumptions of energy. Furthermore, IRPC commits to reduce environmental impact from its operations by initiating environmental management program covering air quality control, waste management, waste water management and spillage control, and attending Eco Factory program by the Industrial Environment Institute, the Federation of Thai.

2. Management System/Process 
IRPC adopts PTT Group’s Operational Excellence Management System (OEMS) for managing organization towards operational excellence. Numbers of project are initiated to increase energy efficiency by energy optimization projects and reduce environmental impact from air emissions control and monitoring by instrument installation, waste management by initiating waste to energy project, waste water management by ensuring compliance of water quality after treatment, and spillage control by implementation of both proactive and reactive approaches.

3. Performance 


To ensure that environmental performance in 2016 are comparable with historical data, the data in 2016 in these below table are included UHV (Upstream project of Hygiene and value added product plan) that started commercial operation, in 2019 PPE and PPC Plant started commercial operation.


GRI StandardDataUnit2016201720182019
N/AAnnual productionTonne10,665,38010,038,25412,442,05212,059,756


Materials Consumption

GRI StandardDataUnit2016201720182019
301-1Crude oilTonne8,863,3058,592,3449,943,3529,383,905

Energy Consumption(1) 

GRI Standard



302-1Total direct energyGJ57,351,55052,512,62459,221,32859,072,047
Total indirect energyGJ4,862,5094,016,1134,502,3444,549,128
Total electricity & steam soldGJ5,326,1244,448,6824,703,2204,901,430
Total energy consumptionGJ56,887,93452,080,05559,020,45258,719,745
302-3Energy intensity(2)GJ/tonne of production5.334.494.754.87
302-4Energy saved due to conservation and efficiency improvementsGJ756,7501,914,021604,997422,120


(1) Standards and methodologies used to calculate are based on relevant laws and regulations.

(2) Energy intensity not including energy used during major turnaround period in year 2017

Flared and Vented Hydrocarbon (1), (2), (3) 

GRI StandardDataUnit2016201720182019
G4-OG6Volume of flared hydrocarbonMillion M3104.0470.0157.4462.67
Volume of continuously flared hydrocarbonMillion M319.0259.6755.3752.80
Volume flared hydrocarbon for oil & gas production in relation to volume producedM3/ton of production2.093.784.543.83
N/AMethane Emission of flaredTon132.3790.8374.5281.30


(1) The amount of flared hydrocarbon is calculated accordingly to IRPC’s hydrocarbon management manual, in reference to HM31: Guide to HC Management in Petroleum Refinery Operation and HM32: Guide to Product HC management at Petroleum Product Marketing and Distribution. Management in Petroleum Refinery Operation and HM32: Guide to Product HC management at Petroleum Product Marketing and Distribution.

(2) Hydrocarbons released from production processes gathered from ACB Data (Calculated HC from the differences of feed to products as stored in SAP) and EPS data (Calculated from Feed going into the reactor in each batch 7.5% and products contain Pentane 6.6% each month)

(3) Hydrocarbons released from storage tanks and product and raw material handling, gathered from Ton VOCs of Tank calculations and Marketing& Terminal as Nm3. All reported in the VOCs Inventory.

Greenhouse Gas Emission (1)

GRI StandardDataUnit2016201720182019



Operational control
Direct emissions of greenhouse gas (Scope 1) (2)Million tCO2e3.7923.6813.9533.911
Indirect emissions of greenhouse gas (Scope 2)Million tCO2e0.5470.2960.3150.254
Direct & Indirect emissions of greenhouse gas (Scope 1&2)Million tCO2e3.7493.9664.2264.165
Other indirect emissions of greenhouse gas (Scope 3) (3), (4)Million tCO2e7.49517.90320.29516.623
Equity Basin (5)
Direct emissions of greenhouse gas (Scope 1)Million tCO2e4.6383.9054.4034.365
Indirect emissions of greenhouse gas (Scope 2)Million tCO2e0.8140.2970.3150.254
305-4GHG emission intensity (6)tCO2e/ton of production0.3910.3700.3430.345


(1) GHG calculations refer to API 2009, IPCC 2006, ISO14064-1, The Greenhouse Gas Protocol: A Corporate Accounting and Reporting Standard (Revised Edition), and GWP refers to the IPCC Fourth Assessment Report (AR4-100 year) from the Group’s subsidiaries include those from IRPC PCL, IRPC Oil Co., Ltd., IRPC Polyol Co., Ltd.,UBE Chemicals Co., Ltd (Asia), and IRPC Clean Power Co., Ltd/

(2) This does not include GHG emissions released from process vents.

(3) GHG Emission from Electricity bought from EGAT is Calculated in reference to PDP 2015 Conversion factors calculation.

(4) GHG Emission from Electricity and Steam bought from private Power Plant (Local) is calculated in reference to Allocation of GHG Emission from combined heat and power (CHP) plant Guide to calculation worksheet V.10 (A WRI/WBCSD GHG Protod. Initiative Calculation Tod)

(5) Scope 3 GHG emissions come from employee transportation and use of B5, E10, and E20  inclusion of sales and transport data, electricity loss data (PTT Tool).

(6) GHG emission intensity was calculated from Scope 1 and Scope 2 GHG emissions.

Air Emissions (1)

GRI StandardDataUnit2016201720182019
305-7Total NOxTonne 1,7301,4181,7591,592
NOx intensityTon/thousand ton of production0.15590.1320.1410.132
Total SOx(2)  (3) (4)Tonne2,3412,1541,5661,800
SOx intensityTon/thousand ton of production0.2110.1130.1260.149
Total suspended particulate (TSP)Tonne298238270338
TSP intensifyTon/thousand ton of production0.0280.0220.0220.028
Total VOCs (5)Tonne 2,6982,0152,1071,897
VOCs intensityTon/thousand ton of production0.2430.1870.1690.157


(1) This comes from direct measurements and relevant standards and regulations.

(2) Sulphur oxide quantities in the form of sulphur dioxide.

(3) SOx Intensity was not included in the calculations of oxide in sulphur during major turnaround.

(4) The SOx and TPS Emission in 2019 increased due to the CFBC Boiler (Power Plant) Operate after the renovation.

(5) VOCs Calculation methodologies for gas flaring were adjusted in reference to US.EPA 2015, and there were also changes in calculations for the storage of raw materials and products.

Water Consumption and Discharge

A. Withdrawal: Total municipal water supplies (or from other water utilities)Million cubic meters0.016210.014600.015110.03083
B. Withdrawal: Fresh surface water (lakes, rivers, etc.)Million cubic meters24.6525525.2899928.6740427.50586
C. Withdrawal: Fresh groundwaterMillion cubic meters0.007720.007590.008360.00013
D. Discharge: Water returned to the source of extraction at similar or higher quality as raw water extracted (only applies to B and C)Million cubic
E. Total net fresh water consumption (A+B+C-D)Million cubic meters15.4655115.3095718.7373714.63740


(1) The fresh surface water from natural sources is re-calculated from the receipts issued by Royal Irrigation Department (Khlong Yai River Basin) and rainwater in the reservoirs within IRPC Industrial Zone.

Solid Waste

GRI StandardDataUnit2016201720182019
306-2Total waste generateTon54,63654,69155,59851,275
    Non-hazardous wasteTon27,60128,32338,57939,529
    Hazardous wasteTon27,03526,36817,01911,747
Total waste used/recycled/soldTon39,54833,62242,48745,318
    Non-hazardous wasteTon24,43425,34638,37737,592
    Hazardous wasteTon15,1148,2764,1107,726
306-4Hazardous waste transportationTon27,03526,36817,01911,747
Hazardous waste import to IRPCTon000
Hazardous waste export from IRPCTon27,03526,36817,01911,747
Hazardous waste treatedTon002442
Hazardous waste shipped internationallyTon895221,054308


Waste management information was gathered from service providers certified from the Department of Industrial Works

Oil and Chemical Spills

GRI StandardDataUnit2016201720182019
306-3Significant Oil & Chemical SpillsCase0000
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