Seven relocated emergency sirens plus six new ones will sit silently in their positions while their brethren sound off during Tuesday's siren test.

The sirens are part of 41 sirens in Umatilla and Morrow counties that are installed to alert people of an unlikely accident at the Umatilla Chemical Depot, which stores 3,717 tons of chemical weapons seven miles west of Hermiston.

The sirens, plus seven on the depot and several in southern Benton County, Wash., are tested at noon on the last Tuesday of each month. The sirens sound for one minute with a continuous tone and include instructions in English and Spanish.

In an actual emergency, the sirens would sound for three minutes with a "whoop-whoop" tone.

Tom Worden, the public information coordinator for Oregon Emergency Management, said Friday that the several sirens won't be operational during Tuesday's test because the electricity isn't yet hooked up to the sirens. He said the sirens should be operational by next month.

In addition, one more siren is on order and will be installed in the coming months.

Tuesday's test will follow a test on the depot on Monday, which will involve only those sirens on the depot.

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