Lead in pre-1950 homes, rail yard diesel and a foundry brownfield, weighed through exposure histories and testing data, compose NU450's Unit 7 environmental assessment. Searches like "nu 450 unit 7 assignment example", "nu450 unit 7 sample" and "nu450 unit 7 example" land here.
Old Paint, Idling Locomotives and a Fenced Foundry Site: An Environmental Health Assessment Ordered by Strength of Evidence
[Student Name]
Purdue University Global
NU450: Public Health Nursing - Population-Centered Health Care in the Community
Unit 7 Assignment
[Instructor Name]
[Date]
Composite neighborhood data written as a model document. Local figures are illustrative.
Sources
State blood lead surveillance for the neighborhood's census tracts; housing age from the American Community Survey; the nearest regulatory air monitor, six miles away; and the city's brownfield inventory.
Hazard 1: Lead
Source: paint in housing built before 1978, much of it deteriorating. Pathway: dust from peeling paint and friction surfaces such as windows, ingested by young children through hand-to-mouth activity. People most exposed: children under six. Data: of about 1,010 children under six, 412 were tested in a year, 40.8 percent. Of those tested, 37, or 9.0 percent, reached 3.5 micrograms per deciliter or higher, the blood lead reference value CDC adopted in 2021 (Ruckart et al., 2021). That 9.0 percent is not the rate among all young children, because the children who were tested may differ from those who were not. Nursing role: home visits that include a lead exposure history and a look at windows and porches; follow-up of every elevated result.
Hazard 2: Diesel Exhaust
Source: idling locomotives at the rail yard and freight trucks on the truck route. Pathway: inhaled fine particles and other pollutants. People most exposed: children at the elementary school two blocks from the yard; residents along the truck route; people with asthma. Data: none local. The nearest monitor is six miles away. EPA set the annual fine particle standard at 9.0 micrograms per cubic meter in 2024 (Environmental Protection Agency, 2024), but no one knows whether Foundry Row meets it. Nursing role: ask about respiratory symptoms on visits; advocate for a local monitor.
Hazard 3: The Brownfield
Source: the former foundry site, fenced and not cleaned up. Pathway: possible contact with contaminated soil by people using the worn path through the fence. People most exposed: children and teenagers who cut through. Data: none on what the soil holds. Nursing role: report the fence gap; ask the city for the site's assessment records.
Exposure Histories on Home Visits
The I PREPARE mnemonic structures an environmental exposure history: investigate potential exposures, present work, residence, environmental concerns, past work, activities, referrals and resources, and education (Agency for Toxic Substances and Disease Registry, n.d.). The ANA's principles of environmental health for nursing practice place this kind of assessment within every nurse's role (American Nurses Association, 2007). A nurse on a home visit may learn what no regulatory file records: that a landlord sanded the windows last month, or that children play on the foundry lot after school.
References
Agency for Toxic Substances and Disease Registry. (n.d.). Taking an exposure history: I PREPARE. Agency for Toxic Substances and Disease Registry.
American Nurses Association. (2007). ANA's principles of environmental health for nursing practice with implementation strategies. American Nurses Association.
Environmental Protection Agency. (2024). Final reconsideration of the National Ambient Air Quality Standards for particulate matter (PM). U.S. Environmental Protection Agency.
Ruckart, P. Z., Jones, R. L., Courtney, J. G., LeBlanc, T. T., Jackson, W., Karwowski, M. P., Cheng, P.-Y., Allwood, P., Svendsen, E. R., & Breysse, P. N. (2021). Update of the blood lead reference value: United States, 2021. MMWR. Morbidity and Mortality Weekly Report, 70(43), 1509-1512. https://doi.org/10.15585/mmwr.mm7043a4
How this NU450 Unit 7 example is structured
Hazards are ordered by strength of evidence, which the paper states openly. Lead comes first because local testing data exist, even if incomplete, and the section explains that 9.0 percent of tested children is not the rate among all children, since those tested may differ from those who were not. Diesel comes second, with plausible exposure and no local measurement, so the section argues for monitoring rather than asserting harm. The brownfield comes last: fenced, unremediated, with a worn path through the fence, but no data on what the soil holds. Each hazard section uses the same four parts, source, pathway, people most exposed and nursing role, so the reader can compare them. The nursing section explains how the I PREPARE mnemonic structures an exposure history on a home visit, and cites the ANA's principles of environmental health for nursing practice.
Get an NU450 Unit 7 example written to your instructions
Environmental health prompts differ in scope: one hazard in depth, or several surveyed. The model follows whichever scope your prompt sets, fitted to your rubric and to the type of community you are assessing. It is free as a first sample and generally ready in 24-48h. The paper above is an original model document written by our desk, not a submitted student paper and not an official Purdue University Global document.
NU450 Unit 7 questions, answered
What is the I PREPARE mnemonic?
A structured exposure history used in nursing and primary care. The letters prompt questions about potential exposures, present work, residence, environmental concerns, past work, activities, referrals and resources, and education. On a home visit it can surface pathways a chart never records, such as lead carried home on a parent's work clothes. Cite the source your course uses for it.
Is 3.5 micrograms per deciliter a safe blood lead level?
No. It is the CDC's blood lead reference value, set in 2021 to identify children with levels higher than most children nationally so they receive follow-up. No safe level of lead in children has been identified. State programs set their own thresholds for case management and environmental investigation, so check the rules for the state in your paper.
What if there is no local data for a hazard?
Say so, and treat the absence as a finding. Describe the source and pathway you can document, name who would be exposed, and recommend how the gap could be filled, such as a monitor, a soil test or a screening program. Papers that claim harm without data lose credibility; papers that identify what needs measuring gain it.