Ash Macomber had just started as a shift supervisor at the Biddeford Starbucks store on Alfred Street when the pandemic began. Starbucks offered employees who had been exposed to COVID a week of “catastrophe pay,” but it wasn’t enough to cover the time they were out sick, said Macomber, 27, who has worked for the company for four years. Customers frequently came in without masks, despite store workers asking them to wear face coverings.