Another qualified soil investigator could be a local health department employee with how many years of direct supervision?

A local health department employee can be considered a qualified soil investigator if they have a minimum of five years of direct supervision in the field. This requirement is set to ensure that the individuals assessing soil and wastewater systems possess adequate experience and understanding of soil behavior, water drainage, and the implications of soil characteristics on septic system design and installation.

Having five years of supervisory experience empowers the investigator with the necessary expertise to make informed recommendations regarding sewage systems. Such expertise is critical in maintaining public health standards and ensuring that sewage systems function properly without negatively impacting the environment.

Other choices indicate a shorter period of supervision, which may not provide sufficient exposure to the complexities of soil investigation necessary for the role. This standard is put in place to safeguard community health by ensuring that only adequately trained individuals are involved in assessing and planning sewage systems.