SACRAMENTO, Calif. -- The Teamsters Union said it sent a letter last week to the state attorney general here calling for an investigation of complaints that Costco Wholesale Corp. is requiring California employees to collect signatures on petitions to put reform of workers' compensation on a statewide ballot.
choice," Mack told SN.
Costco officials could not be reached for comment. The warehouse club operator is based in Issaquah, Wash.
Mack said the union's objectio