California Code, Health and Safety Code - HSC § 42402.6

(a) Penalties prescribed pursuant to Sections 42402, 42402.1, 42402.2, 42402.3, 42402.4, and 42402.5 for violations may be multiplied by a factor of not more than three if both of the following occur:

(b) For purposes of this section, “source” means an establishment that is located on one or more contiguous or adjacent properties.

(c) In assessing penalties, health impacts, community disruptions, the timeliness and accuracy of the notifications from the violator, and other circumstances related to the violation shall be considered, pursuant to Section 42403.