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Community exposure evaluations start with documentation and objective measurement. Reviewing permits, emission data, and complaints builds context. Deploying ambient monitoring—grab samples, summa canisters, or real-time H2S/mercaptan monitors—provides exposure data to compare with health-based guidelines (e.g., ATSDR, EPA). Evacuation (Option A) is warranted only if levels exceed acute health thresholds, which requires data. Immediate blood testing (Option C) is premature, as mercaptans are transient and biomarkers may not exist. Advising residents to seal windows (Option D) without investigation is inadequate and may heighten mistrust. CIHs integrate monitoring data with exposure guidelines, symptom surveys, and risk communication. Transparency, timely response, and interagency coordination are central to credible community exposure management.