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percolation and evaporation pond operation accepting oilfield produced water, which is a highly saline byproduct of local oil production that contains small concentrations of cancer-causing chemicals.

The wastewater allegedly contained arsenic, benzene, ethylbenzene, naphthalene, radionuclides and toluene.Clean Water Fund and AIR alleged the practice has created an underground plume that has spread more than two miles since monitoring wells were established in the area in 2004, and that the contamination may eventually reach Buttonwillow's drinking water supply.

Valley Water Management Company (owner) & Sentinel Peak Resources (oil producer): fined $645,000

Clean Water Fund & Association of Irritated Residents: sued using Prop 65 (Safe Drinking Water and Toxic Enforcement Act of 1986) to shut down pond

other oil companies: inject wastewater deep underground in or near reservoirs where it originated

Central Valley Regional Water Quality Control Board: forced closure of pond out of concern that underground plume will reach Kern River and Bakersfield's drinking water

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.