Key Sustainability Management Performance Environment : Classification, 2014, 2015, 2016 Table.
Classification		2014	2015	2016
Greenhouse gas emissions (thousand tons CO2e)	Scope I	6,406	6,380	6,537
	Scope II	996	986	1,072
	Scope III ¹⁾	24	26	28
Energy consumption (TJ)	Scope I	75,240	79,673	85,422
	Scope II	21,746	21,816	23,024
	Scope III ¹⁾	336	370	378
Air pollutant emissions at Onsan Refinery (tons)	SOx	4,315	4,273	4,959
	NOx	3,509	3,354	3,518
	Dust	79	66	71
Density of air pollutants at Onsan Refinery ²⁾ (legal limit/S-OIL)	SOx (ppm)	180.0/76.8	180.0/82.0	180.0/86.9
	NOx (ppm)	150.0/83.9	150.0/83.0	150.0/82.6
	Dust (mg/Sm3)	30.0/2.5	30.0/2.6	30.0/2.9
Density of water pollutants at Onsan Refinery ³⁾ (ppm) (legal limit/S-OIL)	BOD	10.0/4.2	10.0/3.7	10.0/3.8
	COD	40.0/9.8	40.0/8.1	40.0/8.0
	SS	10.0/3.0	10.0/3.0	10.0/2.6
Number of instances of oil leakage		1 ⁴⁾	0	0
Water use at Onsan Refinery (thousand tons)		20,518	20,322	20,688
Water reuse at OnsanRefinery (thousand tons)		1,759	1,658	1,885
Wastewater discharge at Onsan Refinery (thousand tons)		9,598	9,371	9,584
Designated waste at Onsan Refinery (tons)		10,966	10,555	8,859
General waste at Onsan Refinery (tons)		14,172	18,508	17,515
Waste recycling at Onsan Refinery (tons)		16,495	19,827	14,730
Environmental investment (KRW in millions)		5,731	12,880	16,148

₁₎ Currently Scope III includes only vehicle-based downstream transportation
₂₎ Annual average concentration at TMS heaters and boilers of existing and new facilities
₃₎ BOD data is based on the Company's own water analysis, with TMS data used to measure COD and SS
₄₎ A leakage occurred within artificial barricades due to the chip off of mixer on the underpart of crude oil tanker
(There were no environmental pollution and no administrative punishment in regard to this.)