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Air-quality tests at Kyrene de la Sierra Elementary School in Phoenix revealed elevated levels for 21 chemicals after a roofing project.

While exceeding recommended exposure levels for some compounds, none reached established safety limits.

Students and staff have been relocated until early October.

Official air-quality results showed elevated levels of potentially harmful chemicals after a roofing project disrupted the early weeks of the school year at Kyrene de la Sierra Elementary in Phoenix.

The report, released Aug. 12, showed elevated levels for 21 chemicals, but none reached safety limits, the report said.

Most of the highest readings involved coatings — described as sealants, paint and varnish — and they far exceeded recommended levels of exposure. Where t

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