Which location does not undergo H2S testing and monitoring?

Lube oil tanks are not typically subject to H2S testing and monitoring because the nature of the oil and its storage conditions do not generally create a risk for hydrogen sulfide gas generation. Lube oil is sourced from crude oil and goes through refining processes that remove sulfur content. As a result, the likelihood of H2S formation in lube oil tanks is significantly lower compared to other environments on a vessel, such as fuel oil tanks, which can contain significant amounts of sulfur compounds depending on the type of fuel being stored.

In contrast, fuel oil tanks may contain heavier fuel oils and are more prone to producing H2S due to the breakdown of sulfur compounds, especially when the fuel oil is stored for extended periods. Ballast tanks, depending on the water source and conditions, can also harbor conditions favorable for H2S generation due to organic matter decomposition. Living quarters, while not a source of H2S themselves, may be monitored for overall safety as a precaution against potential leaks from adjacent systems, but they do not typically require H2S testing related to their primary functions.