Analyze

Studie provides visual representations of lead concentration in Santa Ana cross matching it with vulnerability risk.

“Also of note when interpreting our results is that this study did not take into consideration the ingestion of heavy metals through the dietary route. Had we considered this additional exposure pathway, our calculated chronic daily intake levels of heavy metals would have been greater, resulting in higher estimated risk (particularly for metals such as Pb, As, and Cd which have been widely documented in various foods)” (Marsi et al. 2021)

“Both cancer and non-cancer risk at the Census tract level exhibited positive correlations with indicators of social as well as physiological vulnerability” (Marsi et al. 2021)

Exposure to heavy metals has been associated with adverse health effects and disproportionately impacts communities of a lower socio-economic status.  

This study used a community-based participatory research approach to collect and analyze a large number of randomly sampled soil measurements to yield a high spatially resolved understanding of the distribution of heavy metals in the Santa Ana soil, in an effort to exposure misclassification. This study looks into average metal  concentrations at the Census tract level and by land use type, which helps map potential sources of heavy metals in the soil and better understand the association between socioeconomic status and soil contamination (Marsi et al. 2021). 

In 2018, soil samples of eight heavy metals including lead (Pb), arsenic (As), manganese (Mn), chromium (Cr), nickel (Ni), copper (Cu), cadmium (Cd), and zinc (Zn) were collected across Santa Ana. These were analyzed at a high resolution using XRF analysis. Then, metal concentrations were mapped out and American Community Survey data was used to assess the metals throughout Census tracts in terms of social and economic variables. Risk assessment was conducted to evaluate carcinogenic risk. The results of the concentrations of soil metals were categorized according to land-use type and socioeconomic factors. “Census tracts where the median household income was under $50 000 had 90%, 92.9%, 56.6%, and 54.3% higher Pb, Zn, Cd, and As concentrations compared to high-income counterparts” (Marsi et al. 2021). All Census tracts in Santa were above hazard inder >1, which implies non-carcinogenic effects, and almost all Census tracts showed a cancer risk above 104, which implies greater than acceptable risk. Risk was found to be driven by childhood exposure.

It was concluded that the issue of elevated soil contamination relates back to environmental justice due to overlap between contaminated areas and neighborhoods of lower socioeconomic status. Marsi et al. (2021) found there needs to be more community-driven recommendations for policies and other actions to address disproportionate solid contamination and prevent adverse health outcomes.      

Published in May 2021, amid the coronavirus pandemic where in-person community workshops and meetings turned into weekly virtual meetings. 

-> Authors:

Shahir Masri: Department of Environmental and Occupational Health, Program in Public Health, University of California, Irvine; air pollution scientist.

Alana M. W. LeBrón: Department of Health, Society, and Behavior, University of California, Irvine; Assistant Professor, Chicano/Latino Studies; Interests: structural racism and health, health of Latina/o communities, community-based participatory research.

Michael D. Logue: Department of Chicano/Latino Studies, University of California, Irvine

Enrique Valencia: Orange County Environmental Justice, Santa Ana

Abel Ruiz: Jóvenes Cultivando Cambios, Santa Ana; CRECE Urban Farming Cooperative member

Abigail Reyes: Community Resilience, University of California, Irvine

Jun Wu: Department of Environmental and Occupational Health, Program in Public Health, University of California, Irvine

This text builds from earlier conceptions of the term “land dispossession” and “land grab”. As defined by the 2011 International Land Coalition, land grabbing specifically refers to large scale land acquisitions that are “ in violation of human rights, without prior consent of the preexisting land users, and with no consideration of social and environmental impacts”. Characterization of land grabs and their resulting harms most commonly considers the effect of physical displacement and harms within the articulated “grabbed” area (Nyantakyi-Frimpong, 2017;Ogwand, 2018;  huaserman, 2018). Li and Pan seek to expand the frame of analysis for land grabs beyond the site of grabbed land to consider the full extent of harms associated with land grabs both geographically (via pollution spillover to areas outside of “grabbed land”) and temporally (via latent “expulsion by pollution). 

 “While the villagers are not passive victims and have adopted various resistance strategies, the space for them to struggle and achieve success is confined and shaped by the existing power asymmetry in which local villagers, capital and local government are embedded.”  (Li and Pan, 2021, p 418). 

“...this framing of land dispossession is problematic in two aspects. Firstly, it obscures an invisible form of land dispossession in which people still maintain control of their land but its use value is damaged by pollution. This kind of indirect land dispossession could lead to expulsion, not due to the direct loss of control over land but by it being rendered useless by pollution.” Li and Pan, 2021, p 409). 

 This text employs a case study approach to characterize how villagers in a village in China have been displaced “in-place” as a result of new industrial activities within the area  (all specific details have been hidden within the publication, wherein the names of villager groups and the site of study itself is referenced only by coded letters). The scale of analysis primarily centers at the village level, though analysis of the case study itself extends towards the country level specifically when analysis of state actors are involved. 

Authors Hua Li and Lu Pan are scholars from China. Li is  affiliated with the College of Humanities and Law at Taiyuan University of Technology, wherein her research focuses specifically on water politics, environmental justice, and rural development and agrarian change. Pan is affiliated with the College of Humanities and Development at China Agricultural University. Her research interests include marginalized communities, rural development, and agrarian change.