Sewer Gas Intrusion from Noncompliant Plumbing: A Scenario-Based Quantitative Risk Assessment of Two Renovated Hotels in China
This study demonstrates that noncompliant plumbing in two renovated Chinese hotels caused chronic sewer gas (H₂S) intrusion, resulting in hazard quotients that frequently exceeded regulatory thresholds for long-term staff exposure and highlighting the critical need for stricter code enforcement and mandatory post-installation inspections.