Briefly explain the following concepts related to exposure thresholds: time-weighted average, short-term exposure limit, exposure ceiling, and biological exposure indices.
Your response must be at least 200 words in length. You are required to use at least your textbook as source material for your response. Use of information from research and readings beyond the material presented in your textbook is strongly encouraged. All sources used, including the textbook, must be referenced; paraphrased and quoted material must have accompanying citations.