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L.A. residents ferret out toxic sites for researchers
September 7, 2008 08:55 AM - LA Times
Marcela Herrera wiped sweat from her nose as the screeching sound of a saw cutting lumber mixed with mariachi music blaring from a house across the street. Clipboard in hand, Herrera jotted down addresses in this Pacoima neighborhood where lumber, steel, ironworks and heavy equipment rental shops operate near homes.
