The School District of Clayton completed lead testing in all of its buildings this fall. Professional Environmental Engineers (of St. Louis) tested faucets and drinking fountains for lead contamination in all of the District's facilities during September and October and conducted follow-up testing in November. The U.S. Environmental Protection Agency (USEPA) sets an action limit of 15 parts per billion (pbb) for any sample from a drinking water system. This means that the USEPA requires corrective action on any sink or drinking fountain that tests about 15 ppb. The District elected to use a more conservative action limit of 10 ppb in all of the testing.
Testing, and follow-up testing on the only faucet that exceeded levels in its initial test, did not find any instances of lead levels exceeding the District’s 10 ppb action limit. However, there were four locations where levels fell between 5 – 10 ppb. Even though samples in those locations did not exceed the District’s action limit, maintenance staff still took steps to replace the fixtures in those locations, which included:
The Family Center – A faucet and supply lines were replaced in a non-drinking sink in the Red Room that tested at a level of 8.29 pbb.
Captain Elementary School - A faucet and supply lines were replaced in a non-drinking sink Room 68 that tested at a level of 5.06 pbb.
Meramec Elementary School – An existing drinking fountain outside Room 4 was replaced with a new model (with filter cartridge). The existing fixture tested at a level of 6.81 pbb.
Clayton High School - A faucet and supply lines were replaced in a non-drinking sink in Room 118E (library work room) that tested at a level of 9.84 pbb.