California Code, Health and Safety Code - HSC § 41855.6

(a) The district determines that there is no economically feasible alternative means of eliminating the waste.

(b) The district determines that there is no long-term federal or state funding commitment for the continued operation of biomass facilities in the San Joaquin Valley or development of alternatives to burning.

(c) The district determines that the continued issuance of permits for that specific category or crop will not cause, or substantially contribute to, a violation of an applicable federal ambient air quality standard.

(d) The state board concurs with the district's determinations pursuant to this section.