In 2022, we generated a total 248.32 tons of waste, including general industrial waste and domestic waste (excluding class E hazardous industrial waste), in which 62.60 tons (25.21%) of the waste were recycled, while 185.72 tons of waste could not be recycled. As a result of new offices put into use and increased number of staff, total waste generation volume in 2022 increased by 54.06 tons from last year. The waste generation intensity was 0.0041 tons per million NTDs of operating revenue in 2022, up by 32.71% from the previous year.
Hazardous industrial waste is the waste generated by any business that is toxic, dangerous, and in sufficient concentration or quantity to affect human health or pollute the environment. The Company generates hazardous industrial waste, mainly under the waste item E0217 (Scrapped electronic parts and components, leftover scrap and defective goods) from our activities of product experimentation. In 2022, a count on the total weight of hazardous industrial waste produced by all of our operating sites in Taiwan was made, which was 6.17 tons in total; and all the waste has been completely removed at the end of 2022.
All of the Company's hazardous industrial waste is removed by qualified disposal and treatment vendors, and conveyed to a professional electronics recycling and treatment plant, which treats the waste physically and chemically. The crushed waste is then shipped abroad, where it is incinerated for metal extraction (there is no heat energy recovered during the course.) To ensure our hazardous industrial waste is handled properly by our contracted disposal and treatment vendors, the OHS Unit will inspect the operating procedures of the disposal and treatment vendors and their operating performance on a regular basis by following the removal truck to its destination in person or conducting on-site audits, making sure that the risks and impacts of our hazardous industrial waste posed on the environment are minimized. Two in-vehicle audits and one onsite audit were conducted in 2022, and the vendors all passed the audit.