Deficiencies in Environmental Testing and Inspection Laboratories Identified Via On-site Assessments (II) Waste, Soil, Indoor air Quality-

This study conducted site assessments of 66 test institutions in the waste sector, 73 test institutions in the soil sector, and 104 institutions in the indoor air quality sector, key deficiencies. In the waste sector, common deficiencies included the inadequate sample collection, insufficient familiarity with the testing methods, and poor sample homogenization. In the soil sector, the contamination of the background sample and quality control when replacing the test personnel were identified as common deficiencies. In the indoor air quality sector, common deficiencies include inadequate sample collection records and poor performance checks of the DNPH cartridge. The results highlight the critical need for improved record management across sample collection and analysis.