On April 29th, 2019 the San Diego Air Pollution Control District (SDAPCD) released a public notice detailing the preliminary decision made to update the "Toxic Air Contaminants for which Potential Carcinogenic Impacts Must be Calculated" table to include Tertiary Butyl-Acetate (TBAc). This table appears as "Table 1" in two SDAPCD rules, Rule 1200 (Toxic Air Contaminants - New Source Review) and Rule 1210 (Toxic Air Contaminant Public Health Risks - Public Notification and Risks Reduction).
The SDAPCD wants to include TBAc as a new toxic air contaminant into their current table, because the California Office of Environmental Health Hazard Assessment (OEHHA) has decided that exposure to TBAc has potential carcinogenic impacts.
According to the SDAPCD, "TBAc is used primarily as a solvent in the production of lacquers, enamels, inks, adhesives, thinners and industrial cleaners." The public notice to revise Table 1 in Rules 1200 and 1210 can be reviewed on the SDAPCD's website.