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On July 16th 1979, the largest by volume radioactive spill in US history took place in Church Rock (Kinłitsosinil), which is located in the southeastern “checkerboard area” of the Navajo Nation (Diné Bikéyah) and northwestern New Mexico. Due to a breach in the former United Nuclear Corporation’s uranium mill tailings dam, an estimated ninety-four (~94) million gallons of radioactive, toxic, and highly acidic effluent spilled into the Puerco River (Brugge et al. 2002; SRIC 2009).

The Church Rock Uranium Mill Tailings Spill marked the disastrous beginning of the end for the uranium mining industry in the Navajo Nation and New Mexico. Ironically, the spill occurred on the very same day as an event 34 years prior that marked the beginning of the uranium boom and the dawn of the atomic age: the Trinity Test of July 16th 1945, “the day the sun rose twice.” (Szasz 1984) Unlike the world’s first nuclear explosion in southern New Mexico, the Church Rock mill spill remains relatively underreported and has not yet registered at a national scale of collective memory.

How are Data Gaps Worked Around:

Sarnia, and the surrounding area around chemical valley, have 9 air monitoring stations in which air pollutants are monitored from the nearby petrochemical complex. Until 2017, only data from one of these stations (the one on Christina Street in downtown Sarnia) was publicly available. This created a gap in accessiblility of important data for sarnia and the nearby AFN residents. In September 2015, the Clean Air Sarnia and Area group launched as a "community advisory panel made up of representatives from the public, government, First Nations, and industry, who are dedicated to providing the community with a clear understanding of ambient air quality in the Sarnia area." This group works to improve air quality in Sarnia by making information about air quality publicly available and by making recommendations to relevant authorities. In 2018, this group launched the website: https://reporting.cleanairsarniaandarea.com/ (also uploaded as an artifact) which allows public to access data from the air quality monitoring stations and understand how air quality compares to Ontario's standards. This site works to fill the gap of publicly available air quality data in Sarnia.

This report from Ecojustice shows a decline in air pollution compared to Ecojustice's first report released in 2007 for the area around Chemical Valley, yet Sarnia industries continue "to release far more pollution, and in particular far more SO2 , than comparable U.S. refineries." One contributor to the continued excessive emissions is Ontario's lagging air quality standards. The report notes that "Ontario’s AAQC and air quality standards are lagging behind current science on the health impacts of air pollutants, which may put the health of residents at risk." The report highlights pollutants where Ontario's standard is above the national standard or where Ontario has no standard at all. Additionally, Sarnia's benzene emissions are exempt from Ontario's health-based standard for this chemical and are instead regulated by  "an industry technical-based standard" allowing benzene levels to be far higher than the health-based standard. The lagging, lack of, or exemption from regulation undercut efforts in monitoring and reducing emissions to a "safe" level as what is considered "safe" by standards is out of line with what is considered "safe" by health and other standards.