Toilet and handwashing facilities for food crop harvesting operations shall be provided at convenient locations. For the purpose of this article "convenient" means within a five-minute walk of place of work.
When, because of layout of access roads, ground terrain, or other physical conditions, it is not possible to comply with the foregoing requirement, toilet and handwashing facilities shall be located at the point of vehicular access closest to the workers.
Ca. Health and Saf. Code § 113345