The Household Hazardous Waste Day held Oct. 13 by the Randolph Board of Health was deemed a success, as hundreds of residents dropped off materials at the high school parking lot. Paula Steward, the town’s recycling coordinator, said volunteers counted more than 300 cars at the 16th annual event. After so many years of coordinating the collection, “we’ve got this down to a science,” she said. The town pays a $10,000 setup fee to Clean Ventures, a Framingham waste removal company, to haul away the hazardous waste, which included TVs and other electronics, fluorescent bulbs, batteries, oil paints, and household chemicals. The event also included a data destruction station with a state-of-the-art shredder and a medication take-back and disposal assisted by a Walgreens pharmacist and police officers. This was the first year residents didn’t have to get out of their cars to dispose of unwanted medication, and volunteers directed drivers to different lanes depending on what items they wanted to get rid of. “We had great flow,” Steward said.