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Researchers And Science Ready To Help EJ Communities

DTSC staff and the DELTA Group of UC Davis invited Jesse Marquez, far left, seated, of the Wilmington EJ community to help install an air monitor atop a local building. Left, Prof. Thomas A. Cahill and David Barnes of DELTA listen as an EJ resident talks about air pollution..

I n May 2009, DTSC formed a contractual partnership with the DELTA Group of the University of CaliforniaDavis to research the deposition of hazardous waste particulate matter.

both within close proximity to a rail yard. Both sites will include sampling of coarse particles in air, which will deposit on surfaces, which can then be directly transferred to people by contact.

Design and test a GreenAirSystem at UCDavis and then field test the system at a local residence to prove out the technology. The intent is to create clean air by removing particulates and use of “green” conditioning systems to create cooled or warmed air as required. The resulting air would then be used to create a positive pressure of clean air that will keep the external contaminated air from infiltrating due to normal air exchange.

Evaluate mitigation options which have quick implementation timelines. Some technological solutions have longer implementation times because of replacement schedules while other mitigation methods can be implemented upon approval, such as vegetative barriers, setbacks, and scheduling changes.

DELTA is a leader in the collection, identification and study of aerosols, especially those containing ultrafine particles that can embed in the human body and damage health. And its founder, Professor Thomas A. Cahill, worked with UCDavis scientists to analyze World Trade Center air after the Sept. 11, 2001, terrorist attack and detailed the toxic contents and potential health impacts.

These days, the DELTA Group is committed to reducing adverse human health impacts caused by the emission, transport and deposition of harmful particles and uses advanced sampling and analysis to track particles back to the source via identification of a distinctive “chemical signature.”

DELTA joined DTSC in the San Bernardino/Riverside counties bus tour in August 2009. Since the formation of the Inland Valley Task Force and in response to community concerns, DELTA has made a commitment to do the following:

  • Evaluate if toxic particle deposition is a problem by conducting sampling during the 20092010 winter at two locations,


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