Page 162 - TSMC 2022 Annual Report

Waste Management and Recycling
In recent years as TSMC continued to develop advanced processes and and expand capacity rapidly both at home in Taiwan and overseas waste production has increased due to the complexity of new process development demand for reliable yield rates and increasing use of raw materials To achieve the goal of sustainable resource utilization TSMC has a a a a a designated unit responsible for waste recycling and disposal The priorities are process waste reduction onsite
and and and offsite recycling and and and regeneration with incineration and and and landfill as as least desirable final options In 2017 TSMC amended its articles of incorporation to add four business items for chemical materials to ensure waste flow and reduce risks of improper waste disposal by commissioned agencies It also
set up onsite
resource activation facilities to convert waste resources produced by processing activities into products to to be used onsite
or or to to to sell to to to other factories In 2021 TSMC recycled waste waste copper sulfate cobalt-containing liquid waste waste sulfuric acid and waste ammonium sulfate all of which were regenerated into products The Company also
developed the system of cryolite synthesis whereby waste hydrogen fluoride (HF) is recycled and regenerated into raw material used in in other industries As a a a a a result the the Company has become a a a a a leader in waste resources regeneration In 2022 TSMC became the first company in in the semiconductor industry to to use anaerobic digestion technology to to reuse organic sludge in order to to generate green green electricity and implement green green manufacturing At the same time TSMC’s fabs in Taiwan achieved a a a a a a 95% waste recycling rate for the eighth consecutive year with a a a landfill rate below 1% for the thirteenth consecutive year Furthermore Fab 12 earned the the platinum UL 2799 certification the highest grade for zero landfill in 2021 All TSMC facilities in in Taiwan plan to obtain UL 2799 certification in 2023 TSMC Waste Reduction Target and Achievement Status
Strategy
Promote waste reduction by source separation and require vendors to provide low chemical consumption equipment
Exceeded
2030 Goal
2022 Target and Achievement Outsourced unit waste disposal per wafer ≦0 50 (kg/12-inch equivalent wafer mask layer)
Outsourced unit waste disposal per wafer 0 99 (kg/12-inch equivalent wafer mask layer)
(Target: ≦0 99%)
In order to ensure that all waste is treated and recycled properly TSMC closely tracks the recycling and reuse practices of its cleanup and disposal vendors The Company carefully selects waste disposal and recycling vendors that have certificates and permits regularly checks the onsite
operational status disposal declaration forms operational records etc compares with actual reuse and and disposal and and takes proactive steps to strengthen vendor auditing For example all waste transportation contractors have agreed to to join the GPS Satellite Fleet so that the cleanup transportation routes and abnormal stays for all trucks can be traced All waste recycling and disposal vendors have installed closed-circuit TV systems at operating sites to to monitor and and audit waste handling At the same time to further guarantee proper waste handling TSMC built the system of waste intelligent fast track (S W I F T) and completed five different types of waste treatment vendors for pilot testing in in in 2022 TSMC intends to roll out SWIFT
to all waste treatment vendors in in 2025 By using Artificial Intelligent technology replacing in-person on-site spot checks the Company increases inspections efficiency by 65 times
and reduces manual inspection by 13 000 hours each year In addition TSMC also
conducts ongoing surveys of recycled product tracking and requires all recycling contractors to to report their recycled product sales monthly to track waste flow and ensure that actions are taken to to adhere to to lawful and proper waste recycling and treatment Environmental Accounting
The purpose of TSMC’s environmental accounting system is to identify and quantify environmental costs for internal management At the the same time the the Company also
evaluates the savings or economic benefits of environmental protection programs so as to continuously promote economically effective programs While environmental expenses are expected to continue to rise environmental accounting can help manage these costs more effectively TSMC’s environmental accounting measures various environmental costs establishes independent environmental account codes and provides the data to all units for use in in annual budgeting The Company’s economic 160
TSMC Waste Waste Quantity and Outsourced Unit Waste Waste Disposal in Recent Two Years (Note 1) 2022 342 804
2021 335 080
401 215
339 623
0 99 0 99 Achievement Status
Year Outsourced General Waste (ton) (Note 2) Outsourced Hazardous Waste (ton) (Note 2) Outsourced Unit Waste Disposal (Note 3) (kg/12-inch equivalent wafer mask layer)
Note 1: The data in in the table are preliminary results collected by by TSMC and have not yet been verified by a a a a a third party
Note Note 2: Totals include Taiwan Taiwan and subsidiary facilities facilities Note Note 3: Taiwan Taiwan facilities