Metric	Unit of Measure	SASB Code	2021	2020
GREENHOUSE GAS EMISSIONS
Direct GHG emissions (same as gross global Scope 1 emissions)	Metric tons CO2e	IF-WM-110a.1	2,0291	1,4512
Indirect Scope 2 emissions from electricity consumption	Metric tons CO2e		3,564	3,2583
Other indirect Scope 3 emissions	Metric tons CO2e		1,153	464
Total Operated Direct + Indirect GHG Emissions	Metric tons CO2e		6,746	5,173
Emissions avoided through carbon sequestration	Metric tons CO2e		(199,798)4	(231,764)
Net Negative Carbon Footprint	Metric tons CO2e		(193,052)	(226,591)
Scope 1 emissions intensity	kg CO2e/bbl		0.1695	0.173
Scope 2 emissions intensity	kg CO2e/bbl		0.2975	0.389
Scope 3 emissions intensity	kg CO2e/bbl		0.0965	0.055
Total Operated Direct + Indirect GHG Emissions Intensity	kg CO2e/bbl		0.562	0.617
Total sequestered	Metric tons CO2e		(276,153)	(278,805)7
Total fuel consumed	Gigajoules (GJ) Metric tons CO2e	EM-SV-110a.1	26,1711 1,847	18,224 1,2702
ENERGY MANAGEMENT
Total energy consumed	Gigajoules (GJ) Metric tons CO2e		32,4981 3,564	27,689 3,258
AIR QUALITY
Nitrogen Oxide (NOx) emissions	Metric tons	IF-WM-120a.1	not meaningful	not meaningful
Sulfur Oxide (SO2) emissions	Metric tons	IF-WM-120a.1	not meaningful	not meaningful
Volatile organic compounds	Metric tons	IF-WM-120a.1	49.56	49.116
Hazardous air pollutants	Metric tons	IF-WM-120a.1	4.49	4.456
Slurry Emissions	Metric tons CO2e		115.99	119.21
Landfill Emissions	Metric tons CO2e		66.14	61.67
Number of facilities in or near areas of dense population	Number	IF-WM-120a.2	0.0	0.0
Number of incidents of non-compliance associated with air emissions	Number	IF-WM-120a.3	0.0	0.0
MANAGEMENT OF LEACHATE & HAZARDOUS WASTE
Number of correction actions implemented for landfill releases	Number	IF-WM-120a.2	0.0	0.0
Number of incidents of non-compliance associated with environmental impacts	Number	IF-WM-120a.3	0.0	0.0
WORKFORCE HEALTH & SAFETY
Total recordable incident rate (TRIR)	Rate	IF-WM-120a.1	0.0	0.0
Fatality rate	Rate	IF-WM-120a.1	0.0	0.0
Near miss frequency rate (NMFR)	Rate	IF-WM-120a.1	0.0	0.0
Number of road accidents and incidents	Number	IF-WM-320a.3	0.0	0.0
Total vehicle incident rate (TVIR)	Rate	EM-SV-320a.1	0.0	0.0
DIVERSITY - MANAGEMENT
GENDER REPRESENTATION
Female	Percentage		7%	12%
Male	Percentage		93%	88%
RACIAL/ETHNIC GROUP REPRESENTATION
White	Percentage		82%	84%
Hispanic	Percentage		11%	12%
Black or African American	Percentage		7%	4%
Asian or Pacific Islander	Percentage		0%	0%
Native American	Percentage		0%	0%
Two or More Races & Other	Percentage		0%	0%
DIVERSITY - NON-MANAGEMENT
GENDER REPRESENTATION - Non-Management
Female	Percentage		11%	15%
Male	Percentage		89%	85%
RACIAL/ETHNIC GROUP REPRESENTATION - Non-Management
White	Percentage		26%	28%
Hispanic	Percentage		55%	55%
Black or African American	Percentage		15%	16%
Asian or Pacific Islander	Percentage		3%	0%
Native American	Percentage		0%	0%
Two or More Races & Other	Percentage		1%	0%

 

¹ Total GHG emissions increased from 2020 to 2021 due to an increase in activity related to the disposal of more barrels of waste, which requires more electricity, fuel, and contracted

support.

² Scope 1 emissions and related CO₂e from fuel consumption restated for 2020 due to updated emissions factors and categorization of equipment.

³ Scope 2 emissions for 2020 restated for consistency in reporting methodology used for 2021.

⁴ Total emissions avoided through sequestration decreased from 2020 to 2021 due to the mix of waste received from customers (i.e., Milestone received more oil-based waste in 2020

vs. more water-based waste in 2021).

⁵ Emissions intensity calculated as follows: [Emissions ÷ (Liquids managed + Incidental Solids managed)]. Solids converted from cubic yards to barrels using 4.81 bbl/yd3.

⁶ Air quality VOC and HAP concentrations for 2020 restated to reflect consistency in reporting methodology.

⁷ Activity metric, total volume of incidental solids managed restated for 2020 based on a prior misapplied application of conversation factors.