Prior to beginning an asbestos abatement job, which department must the contractor notify in writing?

The correct choice is the Department of Health Services, as this department is primarily responsible for regulating health-related issues surrounding hazardous materials, including asbestos. Prior notification is crucial to ensure that proper health and safety measures are in place to protect workers and the public from potential exposure to asbestos fibers. Ensuring the health department is informed allows them to take necessary precautions, provide oversight, and coordinate any public health responses that may be needed.

Other departments may play roles in various aspects of construction and environmental safety, but when it comes to the direct health implications of asbestos abatement, the Department of Health Services is the key regulatory body focused on public health and safety regarding hazardous substances.