California Code, Health and Safety Code - HSC § 43013.3

(a) That the removal of MTBE in motor vehicle fuel on a subregional basis will not cause or contribute to the basin being designated as a state or federal nonattainment area for one or more ambient air quality standards, including, but not limited to, state or federal ambient air standards for ambient ozone and carbon monoxide.

(b) That the removal of MTBE in motor vehicle fuel will not increase potency-weighted air toxic compounds, or violate one or more control measures adopted by the state board or a district pursuant to Chapter 3.5 (commencing with Section 39650) of Part 2.

(c) That the subregion is a vulnerable groundwater area as defined in Section 25292.4.

(d) That the removal of MTBE will not significantly affect the price or supply of gasoline in the subregion.