Air Quality officials required Carlton Forge to install new enhanced filtration systems and raise the stacks on certain buildings in order to properly disperse pollutants higher into the atmosphere to minimize impacts at ground level. This is a standard best practice adopted by the industry and supported by air quality regulators. Proper dispersion of pollutants results in a reduction of pollution density. Additionally, specific to Hexavalent Chromium pollution, monitor location 25 is located at Lincoln School and has had some of the consistently lowest Hexavalent Chromium levels detected in the monitoring by AQMD. Since February 2017 when that location started to be monitored, the average ng/m3 had been 0.33 and for the period of January 1, 2019 through July 23, 2019 – a period in which levels were measured after action was taken by AQMD to mitigate Hexavalent Chromium emissions – the average is 0.21 ng/m3 at the monitor near Lincoln School. Hexavalent Chromium monitoring continues to take place at Lincoln School every 6 days. For monitoring data, see this link: http://www.aqmd.gov/docs/default-source/compliance/Paramount/expanded-monitoring-data-and-map.pdf?sfvrsn=37 and locate test data for monitor #25
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