PU580 Unit 8 Environmental Justice Paper Example

Nine of Twelve Permits on One Side of the River: A Unit 8 Environmental Justice Paper Testing a Composite County's Facility Distribution as an Empirical Claim, Then Asking Which Came First, the People or the Permits

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Purdue University Global

PU580: Environmental Epidemiology

Unit 8 Environmental Justice Paper

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[Date]

Vessey County and its figures are composite; the analytic methods, the historical findings and the research cited are real.

The Claim to Be Tested

That permitted industrial facilities in Vessey County are distributed unequally with respect to race and income, and that the inequality is larger than chance or than land use alone would produce.

The Measurements

1. Unit of analysis: census block group, 61 in the county, which is finer than the tract and coarser than the block. The choice matters: measured at the tract level the disparity shrinks by roughly a third, because the east bank tracts include land across the river.

2. Facility locations: the twelve permits, geocoded to stack location rather than to mailing address, which moved two facilities more than 600 meters.

3. Proximity measure: population within 2 kilometers of any facility, calculated by areal apportionment rather than by whether a block group's centroid falls inside the buffer. The centroid method misassigns six of the 61 groups here.

4. Comparison: the exposed population's composition against the county's, and separately against the rest of the state's non-exposed population.

The Results

Within 2 kilometers of a permitted facility live 14,200 people, 31 percent of the county. That population is 61 percent Black or Latino against 29 percent countywide, with median household income of 34,100 dollars against 61,800 dollars countywide. The ratio of proportions for Black or Latino residents is 2.1. Adjusting for whether a block group is zoned industrial or mixed reduces the ratio to 1.7, which is the paper's central number: zoning accounts for part of the pattern and not most of it. Zoning explains some of the overlap. It does not explain why the industrially zoned land is where it is, which is a different question and an older one.

Which Came First

The question cannot be answered by a cross-sectional map, and the paper says so before attempting it. Two explanations compete. Facilities sited into communities already disadvantaged, which is the disproportionate siting account. Or disadvantaged households moving into the neighborhoods around existing facilities, which is the market dynamics account. The longitudinal literature finds more support for the first than for the second, though the evidence varies by region and by period studied (Mohai & Saha, 2015). Vessey County's own record, read from historical directories and zoning minutes, shows seven of the nine east-bank facilities permitted between 1954 and 1979, in a period when the east bank was already the segregated side of the river. That sequence supports the siting account here, and the paper presents it as local evidence rather than as a general finding.

Why Counting Facilities Understates the Problem

A permit count treats a dry cleaner and a chemical plant as one each. The paper therefore reports three further measures: total permitted emissions by weight, which concentrates the disparity further, since the two largest emitters are both on the east bank; the number of facilities with enforcement actions in the past decade, which is six of nine on the east bank and one of three elsewhere; and co-occurring burdens, including the highway, the rail spur and the two closed sites awaiting remediation. Cumulative burden rather than single-source exposure is what the residents experience, and it is what the policy literature argues regulatory analysis still largely fails to capture (Morello-Frosch et al., 2011).

How the Numbers Move Under Different Choices

A paper of this kind should show its own sensitivity, because each methodological choice is contestable and a reader will suspect the one that produced the largest number. Measured at tract level rather than block group, the ratio of proportions falls from 2.1 to 1.4. Using a 1-kilometer buffer instead of 2 kilometers it rises to 2.6, because the nearest neighborhoods are the most heavily minority. Using centroid assignment rather than areal apportionment it falls to 1.9. Comparing the exposed population against the rest of the state rather than against the county raises it to 2.3, since the county as a whole is more diverse than the state. Excluding the two facilities that are small dry cleaners leaves it at 2.0. The disparity therefore survives every reasonable specification and its size varies by roughly a factor of two across them, which is the honest way to report a geographic analysis. The paper's choice of the block group, the 2-kilometer buffer and areal apportionment is defended on exposure grounds rather than on the number each produces.

What This Paper Does Not Establish

It does not establish that any health outcome in Vessey County was caused by these facilities, and it deliberately reports no health data, because a disparity in exposure is a finding in its own right and attaching a weak health analysis to it would weaken both. It does not establish intent, which is a legal question and not an epidemiological one. And its 1.7 adjusted ratio depends on the choices listed above, so the paper publishes those choices and reports how the number moves under the alternatives.

What the County Could Do With This

1. Require cumulative burden review for any new permit within 2 kilometers of a block group already above the county median for permitted emissions, which is a process change the county controls.

2. Publish the permit map with demographics alongside, annually, since the disparity persists partly because nobody has ever been required to look at it in one figure.

3. Direct the county's monitoring resources to the east bank, where there is currently one monitor against three on the west side.

4. Treat the two closed sites as part of the burden rather than as finished business, since a site awaiting remediation is an exposure pathway and not an administrative leftover.

Why the Framing Matters More Than the Ratio

The field's own definition keeps the emphasis on distribution and on participation in the decisions that produce it, rather than on exposure alone (Mohai et al., 2009). The practical consequence for Vessey County is that a paper of this kind is an input to a permitting process rather than a conclusion about anyone's health, and that the residents who live with the nine facilities should be in the room when the process changes, which is the recommendation that costs the county nothing and is the most likely to be ignored.

References

Mohai, P., Pellow, D., & Roberts, J. T. (2009). Environmental justice. Annual Review of Environment and Resources, 34, 405-430. https://doi.org/10.1146/annurev-environ-082508-094348

Mohai, P., & Saha, R. (2015). Which came first, people or pollution? A review of theory and evidence from longitudinal environmental justice research. Environmental Research Letters, 10(12), 125011. https://doi.org/10.1088/1748-9326/10/12/125011

Morello-Frosch, R., Zuk, M., Jerrett, M., Shamasunder, B., & Kyle, A. D. (2011). Understanding the cumulative impacts of inequalities in environmental health: Implications for policy. Health Affairs, 30(5), 879-887. https://doi.org/10.1377/hlthaff.2011.0153