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Orange County Register-07/10/2022 Page : A001 <br /> SANTA ANA <br /> Studies: Lead in city's soil from vehicle emissions <br /> UCI researchers conclude <br /> gas used in 20th century <br /> `predominant contributor' <br /> By Kaitlyn Schallhorn <br /> kschallhorn@scng.com <br /> w <br /> To examine lead contamina- <br /> tion in SantaAna, and how vehi- <br /> cle emissions have played a role,re- <br /> searchers went back in time. <br /> It's a time-consuming effort,one <br /> that requires much detangling,but <br /> UC Irvine researchers painstak- <br /> ingly dug through archives of his- <br /> torical Santa Ana,putting together _, <br /> a look at its fledgling footprint in <br /> the early 1900s. LEONARD ORTIZ—STAFF PHOTOGRAPHER <br /> Meanwhile,UCI researchers and The intersection of 17th and Main streets in Santa Ana is one of the areas <br /> community volunteers collected researchers say contains high levels of lead in the soil.Two new studies <br /> soil samples around SantaAna, found,through analyzing historical data,that leaded gasoline used in the <br /> which were sent to a lab for detailed 20th century is the biggest cause of existing lead in the soil in Santa Ana. <br /> testing of lead measurements. <br /> Placed side by side, the two lead contamination levels — were dominant contributor to contem- <br /> maps —one a historical outline of nearly identical. porary soil-lead contamination in <br /> SantaAna's roads, traffic patterns UCI researchers concluded, in SantaAna." <br /> and houses and the other high- a pair of recent studies, that his- "The current approach used by <br /> lighting the current and highest torical leaded gasoline is a "pre- LEAD))PAGE 13 <br /> July 18,2022 11:51 am(GMT-7:00) Powered by TECNAVIA <br />