Taseko Mines : 2023 ESG Summary Table

MESSAGE FROM THE CEO OUR COMPANY SUSTAINABILITY ENVIRONMENT SOCIAL INDIGENOUS RELATIONS GOVERNANCE SUSTAINABILITY PERFORMANCE

Sustainability

Performance

H2O + ESG

2023 Sustainability Report

MESSAGE FROM THE CEO OUR COMPANY SUSTAINABILITY ENVIRONMENT SOCIAL INDIGENOUS RELATIONS GOVERNANCE SUSTAINABILITY PERFORMANCE

2023 Sustainability Accounting Standards Board (SASB) Index: Gibraltar Mine Taseko Values Metrics

2023 Sustainability Accounting Standards Board (SASB) Index: Gibraltar Mine

SASB Topic	Accounting Metric	SASB Code	Data - Gibraltar Mine
Greenhouse	(1) Gross global Scope 1	EM-MM-	(1) 2.21 t CO2e/t CuEq - Scope 1
Gas	emissions, (2) Percentage	110a.1	(2) 100%
Emissions	covered under emissions
	limiting regulations
	Discussion of long-term and	EM-MM-	Management of Scope 1 emissions
	short-term strategy or plan to	110a.2	are driven by Gibraltar's 'Energy
	manage Scope 1 emissions,		Management Policy,' which integrates
	emissions reduction		energy management programs
	targets, and an analysis of		and practices across all site-wide
	performance against those		operations and projects with the goal
	targets		of achieving continuous improvement
			in energy efficiency. Through this
			focus on continuous improvement in
			energy efficiency, Gibraltar also seeks
			ongoing improvements in its GHG
			intensity per unit of production.
			Taseko is advancing the Florence
			Copper Project into commercial
			production. As an 'in-situ copper
			recovery' project, Florence Copper
			is expected to be the lowest GHG
			and energy intensity primary copper
			producer in North America, lowering
			Taseko's enterprise-wide GHG intensity
			per unit of production.
Air Quality	Air emissions of the following	EM-MM-	(1) 1,082 (2) 264 (3) 32 (4) 2,201 (5) 0
	pollutants: (1) CO, (2) NOx	120a.1	(6) 0 (7) 3.5
	(excluding N2O), (3) SOx, (4)
	Particulate matter (PM10),
	(5) Mercury (Hg), (6) Lead
	(Pb), and (7) Volatile organic
	compounds (VOCs)
Energy	(1) Total energy consumed,	EM-MM-	(1) 3,605, 539 GJ
Management	(2) Percentage energy from	130a.1	(2) 47.0%
	grid electricity, (3) Percentage		(3) 46.1%
	energy consumed from
	renewable energy sources

SASB Topic	Accounting Metric	SASB Code	Data - Gibraltar Mine
Water	(1) Total fresh water	EM-MM-	(1) 141 thousand cubic metres; 0%
Management	withdrawn (from	140a.1	(2) 6,140 thousand cubic metres*; 0%
	aquifer)		* Includes water withdrawn and precipitation
	(2) Total fresh water		(contact water) stored on-site
	consumed*		(3) 832 thousand cubic metres
	Percentage of each
	in regions with High
	or Extremely High
	Baseline Water
	Stress
	(3) Increase in water
	stored on-site
	Number of incidents	EM-MM-	Three minor incidents occurred in 2023. These
	of non-compliance	140a.2	incidents were short in nature, promptly reported,
	associated with		immediately corrected and not expected to have
	water quality		any lasting effect on aquatic habitat or aquatic life
	permits, standards,		in the Fraser River. The specifics include:
	and regulations		Ì Samples taken at the Fraser River Outfall on
			Friday August 18, 2023, had elevated Total
			Suspended Solids. Immediate remedial
			action included re-analysis of the sample, re-
			sampling with rush analysis, and suspension
			of the discharge. Investigation revealed that
			the sample at the Fraser River Outfall was
			not representative of Tailings Storage Facility
			Supernatant water. Effluent quality was
			reflective of residual water from previous
			flushing and pressure testing.
			Ì On October 11, 2023 and October 18, 2023
			discharge to the Fraser River from the TSF
			recorded elevated Total Suspended Solids
			concentrations. Immediate remedial action
			included re-analysis of the sample, re-sampling
			with rush analysis, and suspension of the
			discharge to the Fraser River. The cause was
			due to elevated TSS near the Tailings Storage
			Facility (TSF) barge, as a result of reduced water
			volumes within the TSF in combination with the
			influence of fall turnover.

MESSAGE FROM THE CEO OUR COMPANY SUSTAINABILITY ENVIRONMENT SOCIAL INDIGENOUS RELATIONS GOVERNANCE SUSTAINABILITY PERFORMANCE

2023 Sustainability Accounting Standards Board (SASB) Index: Gibraltar Mine Taseko Values Metrics

SASB Topic	Accounting Metric	SASB Code	Data - Gibraltar Mine
Waste and	Total weight of non-mineral waste	EM-MM-150a.4	See page 22
Hazardous	generated
Materials
Total weight of tailings produced	EM-MM-150a.5	27,122,843 metric tons
Management
	Total weight of waste rock generated	EM-MM-150a.6	44,910,851 metric tons
	Description of waste and hazardous	EM-MM-150a.10	See page 22
	materials management policies and
	procedures for active and inactive
	operations
	Total weight of hazardous waste	EM-MM-150a.7	See page 22
	generated
	Total weight of hazardous waste	EM-MM-150a.8	See page 22
	recycled

SASB Topic	Accounting Metric	SASB Code	Data - Gibraltar Mine
Security,	Percentage of (1) proven and (2)	EM-MM210a.1	(1) 0% (2) 0%
Human Rights	probable reserves in or near areas of
and Rights of	conflict
Indigenous
Percentage of (1) proved and	EM-MM210a.2	(1) 100% (2) 100%
Peoples
(2) probable reserves in or near
	Indigenous land
	Discussion of engagement processes	EM-MM210a.3	See page 45 - 47
	and due diligence practices with
	respect to human rights, Indigenous
	rights, and operation in areas of
	conflict
Community	Discussion of process to manage	EM-MM210b.1	See page 37, 38
Relations	risks and opportunities associated
	with community rights and interests

Number of significant incidents associated with hazardous materials and waste management

EM-MM-150a.9 Zero. Taseko's definition of a significant incident is one that reports beyond the mine site boundary and requires activation of emergency response to control, mitigate and clean up.

	Number and duration of non-	EM-MM210b.2	0
	technical delays
Labour	Percentage of active workforce	EM-MM310a.1	Canadian: 72%
Relations	covered under collective bargaining		US: 0%
	agreements, broken down by U.S. and
	foreign employees
	Number and duration of strikes and	EM-MM310a.2	0

Biodiversity	Description of environmental	EM-MM160a.1	See page 18 - 30
Impacts	management policies and practices
	for active sites
	Percentage of mine site where acid	EM-MM160a.2	(1) 25%	(2) 25% (3) 25%
	rock drainage is: (1) predicted to occur,
	(2) actively mitigated, and (3) under
	treatment or remediation
	Percentage of (1) proven and (2)	EM-MM160a.3	(1) 0%	(2) 0%
	probable reserves in or near sites
	with protected conservation status or
	endangered species habitat

lockouts

MESSAGE FROM THE CEO OUR COMPANY SUSTAINABILITY ENVIRONMENT SOCIAL INDIGENOUS RELATIONS GOVERNANCE SUSTAINABILITY PERFORMANCE

2023 Sustainability Accounting Standards Board (SASB) Index: Gibraltar Mine Taseko Values Metrics

SASB Topic	Accounting Metric	SASB Code	Data - Gibraltar Mine
Workforce	(1) MSHA all-incidence rate, (2) fatality	EM-MM320a.1	a) Employees: (1) Not
Health and	rate, (3) near miss frequency rate		tracked	(2) 0 (3) Not
Safety	(NMFR), (4) average hours of health,		available	(4) Training
	safety, and emergency response		hours specific to health,
	training for (a) full-time employees		safety and emergency
	and (b) contract employees		management not tracked.
			b) Contract Employees: (1) to
			(4): Not available
Business	Management system for prevention of	EM-MM510a.1	See page 51
Ethics and	corruption and bribery throughout the
Transparency	value chain
	Production in countries that have the	EM-MM510a.2	Zero. Taseko operations
	20 lowest rankings in Transparency		in Canada and the United
	International's Corruption Perception		States.
	Index
Tailings	Tailings storage facility inventory	EM-MM540a.1	See page 22
Storage	table: (1) facility name, (2) location,
Facilities	(3) ownership status, (4) operational
Management	status, (5) construction method,
	(6) maximum permitted storage
	capacity, (7) current amount of
	tailings stored, (8) consequence
	classification, (9) date of most recent
	independent technical review, (10)
	material findings, (11) mitigation
	measures, (12) site-specific EPRP
	Summary of tailings management	EM-MM540a.2	See page 20 - 22
	systems and governance structure
	used to monitor and maintain the
	stability of tailings storage facilities
Activity	Production of (1) metal ores and (2)	EM-MM000.A	(1) Copper: 123 million
Metrics	finished metal products		pounds; Molybdenum: 1.2
			million pounds (2) 0
	(1) Total number of employees (2)	EM-MM000.B	(1) 790 employees (2) Not
	Percentage contractors		available

MESSAGE FROM THE CEO OUR COMPANY SUSTAINABILITY ENVIRONMENT SOCIAL INDIGENOUS RELATIONS GOVERNANCE SUSTAINABILITY PERFORMANCE

2023 Sustainability Accounting Standards Board (SASB) Index: Gibraltar Mine Taseko Values Metrics

Taseko Values Metrics

Social: Our People	Head Office	Gibraltar	Florence	Yellowhead
Vancouver	Mine	Copper
Commitment	Total # Employees	29	704	56	1
to Our
% of Female Employees	34%	12%	27%	100%
Workforce
% of Female New Hires	60%	26%	21%	100%
	% of Indigenous	Not Tracked	14%	Not Tracked	100%
	Employees
	% of Indigenous New	Not Tracked	13%	Not Tracked	100%
	Hires
	Retention Rate - Total	100%	90%	84%	100%
	Retention Rate -	100%	70%	87%	100%
	Females
	% of Employees under 35	7%	27%	36%	Not Tracked
	Average Length of	5.8	8.2	2.6	0.5
	Employment (years)
	% of Workforce under
	Collective Bargaining	0%	75%	0%	0%
	Agreement
	Number and Duration of	0	0	0	0
	Strikes
Health and	Annual Investment in	Not Tracked	$719,586	$34,459	Not Tracked
Safety	Training
	Total Hours Training	Not Tracked	39,713	618	Not Tracked
	Average Hours of	Not Tracked	56	9.6	Not Tracked
	Training/Employee

Social: The Community		Head Office	Gibraltar	Florence	Yellowhead
	Vancouver	Mine	Copper
Commitment	% of Local Employees		97%	73%	Not Available
to Our
$ Wages Distributed		$82,692,656	$3,379,504	Not Available
Workforce
Locally			CAD	USD
	% of Wages Distributed		96%	77%	Not Available
	Locally
	$ Procurement		$206,776,872	$5,867,163	Not Available
	Distributed Locally		CAD	USD
	% of Procurement		41%	13%	Not Available
	Distributed Locally
	% of Employees		43%	93%	Not Available
	Recruited Locally
Community	Site Tours		0	12	32	0
Engagement
Community / Industry
	Meetings, Presentations,		29	22	37
	and Events
	Career Fairs /		2	2	16	1
	Educational Events
Community	2023 Community	$89,260	$127,324	$98,358
Investment	Investment and
CAD	CAD	USD
	Sponsorships
	Total Community	$4,889,300	$2,146,697	$378,570
	Investment and
	CAD	CAD	USD
	Sponsorships	1
	2023 Scholarships /	3		5
	Bursaries Granted
	Total Scholarships /	18		42
	Bursaries Granted

1. Figures date back to 2005 for Taseko, 2008 for Gibraltar, and 2011 for Florence Copper.