Tertiary butyl alcohol plumes in southern california groundwater from leaking underground storage tank sites

Abstract Tertiary butyl alcohol in the groundwater was evaluated using closed leaking underground storage tank sites Southern California between 2016 and 2019. is not regulated lacks a maximum contaminant level California. The current of 12 µg per liter drinking water (notification level) advisory enforceable. As high as 88% during 2018–2019 fiscal year were with tertiary higher than its notification groundwater. Twenty-five percent time, concentrations at closure 2,300 2016–2017, 7,600 2017–2018, 4,400 2018–2019, respectively. plume length increased from 649 feet to 1,128 Considering proximity wells California, this points an increase risk impact on resources. remained above µg/L substantial percentage (70% 2016–1017, 72% 2018–2019) sites. Site practices Los Angeles Regional Water Quality Control Board should be more stringent toward contamination. Despite documented health hazards, has received sufficient attention government agencies. toxicological evaluation indicates significant human concerns. Based upon evidence, MCL considered for water.