Chapter 12 Contamination Criteria and Exposure Limits

Chapter 12 Contamination Criteria and Exposure Limits -...

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Chapter 12 Contamination Criteria and Exposure Limits: Guidelines and Standards Effects extent & frequency vary w/exposure magn & duration Reduce exposure-->reduce effects -banning by FDA -or permissible/acceptable content or level of exposure Exposure limits/contamination criteria Standards/guidelines for degree of quality that are expected to ensure protection of public health & prevent environmental degradation Process of establishing difficult, slow and contentious Conflicting forces at play w/major economic interest Effects data inadequate Standards-setting process delayed sufficiently once begun Lab studies expensive and time consuming Therefore heavily based on “ informed judgement” Guidelines nonbinding recommen. prepared by knowledgeable prof. to assist other prof & pub health auth in evaluating the nature and extend of health risks assoc. w/exposures Standards- Conc. Limits or emission limits having force of law behind their enforcement (enforceable) -est by reg agencies @ national level -consen. Standard by ISO (only enforceable when adopted by reg authorities) -standards by health professionals International level-WHO purpose to provide basis for protecting public health from adverse effects of pollution and hazardous contaminants -PARTS OF A STANDARD-1 or more conc and associ aver times, form of exposure and monitoring are relevant in assessing compliance w/standard, as Legislation and enforcement also necessary Federal government sets nearly all standards now Food for 60 yrs, past 30 yrs occupational exposure from professional
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Chapter 12 Contamination Criteria and Exposure Limits -...

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