United States District Court Judge Phyllis J. Hamilton (Northern District of California) granted Defendant Safety-Kleen Systems, Inc.'s motion to decertify a class of "customer service representatives." Wamboldt v. Safety-Kleen Systems, Inc., 2010 WL 3743925 (N.D. Cal. Sept. 20, 2010). The CSRs had duties extending well beyond what one might expect from the job title, including customer sales, client collections, and various telephone responsibilities, as well as on-site servicing of equipment, transportation of hazardous waste, and driving of company vehicles in order to perform customer service calls. The hazardous waste transportation and the occasional use of large vehicles (in excess of 30,000 lbs. gross vehicle weight) were the primary culprits underlying the motion to decertify.