Poll-worker evaluations are in, and Pima County officials feel pretty good about the results.

Poll workers scored above 95 percent in four of the five major categories audited to ensure secure ballots.

About 95 percent of precincts returned ballot scanners with the proper plastic seal, audit records show. The same percentage returned sealed touchscreen voting machines.

About 98 percent of precincts appropriately returned signed poll tapes, and 99 percent of ballot reports came back as ordered.

The biggest trouble was with the seals placed on the bags carrying voted ballots. About 86 percent of those came back as prescribed.

Poll workers have a big supply of plastic seals to put on objects to protect against tampering, but a special seal is designated for the bag of voted ballots.

The number on that seal is written in a log checked by workers receiving the ballots on Election Night. A matching number signals that the correct bag arrived.

Pima County Elections Director Brad Nelson said discrepancies were most often due to a seal breaking and a new one being applied. The seals are the same type used by the banking industry, and they are fragile, he said.

Nelson expects the seals will continue to be difficult for poll workers, but he doesn't worry about the election's integrity because ballots are always to be in the custody of two poll workers of opposing parties.

County audit figures show that discrepancies have, on the whole, decreased since tracking began in 2008.

Contact reporter Carli Brosseau at cbrosseau@azstarnet.com or 573-4197. On Twitter @carlibrosseau.