NEHA Environmental Health Inspection and Assessment 2 — Questions and Answers
Question 1: What does an environmental health assessment of a housing unit typically evaluate?
- Only cosmetic and aesthetic features of the property
- Lead paint, mold, ventilation, plumbing, pest infestation, structural integrity, heating, and sanitation conditions (Correct answer)
- Only outdoor air quality around the property
- Neighborhood property values and demographics
Correct answer: Lead paint, mold, ventilation, plumbing, pest infestation, structural integrity, heating, and sanitation conditions
A comprehensive housing environmental health assessment evaluates multiple hazards including lead paint, mold and moisture, ventilation adequacy, plumbing and sewage, pest infestations, structural conditions, and heating systems.
Question 2: What is 'sampling bias' and why is it a concern in environmental health assessment?
- A preference for certain laboratory methods over others
- A systematic error in sample selection that causes results to be unrepresentative of the actual environmental condition being assessed (Correct answer)
- The laboratory error rate in chemical analysis
- The tendency for regulators to focus on certain industries
Correct answer: A systematic error in sample selection that causes results to be unrepresentative of the actual environmental condition being assessed
Sampling bias occurs when the samples collected do not accurately represent the population or condition being studied, leading to conclusions that may over- or under-estimate the true extent of contamination or risk.
Question 3: What is the purpose of a 'Preliminary Site Investigation' (PSI) at a potentially contaminated property?
- To conduct full remediation of identified contamination
- To gather existing information and conduct site reconnaissance to determine whether a recognized environmental condition exists before committing to detailed investigation (Correct answer)
- To obtain a building permit for site development
- To conduct laboratory analysis of soil and groundwater samples
Correct answer: To gather existing information and conduct site reconnaissance to determine whether a recognized environmental condition exists before committing to detailed investigation
A PSI (also called Phase I ESA) reviews historical records, databases, and site conditions to identify recognized environmental conditions that may indicate contamination, guiding decisions about whether further investigation is needed.
Question 4: What is 'environmental monitoring' and how does it differ from environmental sampling?
- They are identical terms with no distinction
- Environmental monitoring is the systematic, ongoing measurement of environmental parameters over time; sampling is a discrete collection event that may or may not be repeated (Correct answer)
- Monitoring applies to air only while sampling applies to water and soil
- Monitoring is conducted by regulators while sampling is conducted by industry only
Correct answer: Environmental monitoring is the systematic, ongoing measurement of environmental parameters over time; sampling is a discrete collection event that may or may not be repeated
Environmental monitoring involves systematic, ongoing or periodic measurement designed to track trends and changes over time, while sampling is a specific collection event; monitoring programs typically incorporate repeated sampling at defined intervals.
Question 5: In environmental health site assessment, what is a 'recognized environmental condition' (REC)?
- A site that has received an environmental award or certification
- The presence or likely presence of hazardous substances or petroleum products on a property under conditions that indicate an existing or past release posing potential concern (Correct answer)
- A naturally occurring geological feature affecting the environment
- A site where no contamination has been detected
Correct answer: The presence or likely presence of hazardous substances or petroleum products on a property under conditions that indicate an existing or past release posing potential concern
A REC is defined in ASTM standard E1527-21 as the presence or likely presence of any hazardous substances or petroleum products in, on, or at a property due to a release or conditions indicating a release.
Question 6: What is the purpose of 'quality assurance and quality control (QA/QC)' in environmental sampling programs?
- To reduce the cost of environmental monitoring
- To ensure that data collected is scientifically valid, defensible, and of sufficient quality for its intended use (Correct answer)
- To increase the speed of sample collection and analysis
- To fulfill reporting requirements only
Correct answer: To ensure that data collected is scientifically valid, defensible, and of sufficient quality for its intended use
QA/QC procedures in environmental sampling ensure that data is scientifically valid, comparable, and of known precision and accuracy so that decisions made based on the data are well-founded and defensible.
NEHA Environmental Health Inspection and Assessment 2
What does an environmental health assessment of a housing unit typically evaluate?