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Ed Chun of Center in Park Senior Enivronment Corps Tests Water Quality of Cresheim Creek

ed chun dissolved oxygen cropped

WHAT ARE YOU TESTING FOR?
“We’re with the Senior Environment Corps. We come out here every month to test the water. I'm testing for dissolved oxygen. It’s a three stage process. We add manganese sulfate and the dissolved oxygen in the water oxidizes- don't try to write it down; chemists can't even explain it so well. Watch the colors change.” Ed Chun, Cresheim Creek at Germantown Avenue.

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