This is a tricky situation, and it's crucially important to treat it with the utmost caution. I am not an asbestos abatement professional and cannot provide definitive advice. You MUST consult with a certified asbestos inspector and, if necessary, an abatement contractor before proceeding. However, I can offer some general guidance

Likelihood of Disturbance:

Yes, removing old cables and installing new cables could be considered "disturbing" the asbestos cement conduit. Here's why: Friction

Pulling cables in and out of the conduits, even if they seem smooth, will create friction. This friction could abrade the inner surface of the conduit, releasing asbestos fibers.

Vibration

The act of pulling and pushing cables could cause vibration that loosens asbestos fibers.

Condition of the Conduit

While the exposed portions seem good, the inside of the conduit may be degraded or weakened. Cables that have been in place for decades can adhere to the interior surface of the conduit. Pulling these cables can damage the interior of the conduit.

Asbestos-Containing Dust

Even if the cables don't directly damage the conduit, there might be accumulated asbestos-containing dust inside. The movement of the cables could stir up this dust and release it into the air.

Cables may have been sealed in with an asbestos containing sealant

Many times, when running cables through these conduits, the installers used an asbestos-containing sealant to prevent moisture and vermin from entering.

Why "Disturbing" Matters



Health Risks

Asbestos fibers, when inhaled, can cause serious health problems, including lung cancer, mesothelioma, and asbestosis.

Regulations

Disturbing asbestos is heavily regulated by federal (EPA, OSHA), state, and local agencies. You likely need to comply with regulations regarding notification, worker protection, waste disposal, and air monitoring. Failure to comply can result in hefty fines and legal penalties.

Steps to Take Immediately


STOP Work

Do not proceed with the cable removal and installation until you have expert advice.2.

Hire a Certified Asbestos Inspector

The inspector will: Assess the condition of the asbestos cement conduits. Take samples to confirm the presence of asbestos and its type (if not already known). Determine the extent of the asbestos material. Provide a written report outlining the risks and recommended actions.3.

Consult with an Asbestos Abatement Contractor (if needed)

If the inspector determines that disturbing the asbestos is likely or unavoidable, you will need to hire a licensed abatement contractor. They will develop a plan for safely removing or encapsulating the asbestos, following all applicable regulations.

Possible Courses of Action (Based on Professional Assessment)



Abatement (Removal)

The asbestos cement conduits are carefully removed by a licensed abatement contractor. This is the most thorough approach but also the most disruptive and expensive.

Encapsulation

The asbestos cement conduits are sealed with a special coating that prevents asbestos fibers from being released. This may be a viable option if the conduits are in good condition and are not likely to be disturbed in the future.

Work Practices with Precautions (If Minimal Disturbance)

If the inspector determines that the risk of fiber release is very low, they might recommend specific work practices, such as: Wearing appropriate personal protective equipment (PPE), including respirators. Using wet methods to suppress dust. Containment measures (e.g., plastic sheeting) to isolate the work area. Proper disposal of waste materials.

Abandon in Place

(Least Likely) The conduits may be abandoned in place, and a new wiring method used. This is only practical if the old conduits are no longer needed and pose no future risk of disturbance.

Important Considerations



Worker Training

Anyone who might come into contact with asbestos should be properly trained in asbestos awareness and safe work practices.

Air Monitoring

Air monitoring may be required during any work that could disturb asbestos to ensure that fiber levels remain within acceptable limits.

Documentation

Keep detailed records of all inspections, abatement work, and waste disposal.

In summary, you absolutely must get a professional asbestos assessment before doing anything else. The health risks and legal liabilities are too significant to take any chances. Flag for review