As soon as Euge Lee heard about the petition signed by students at the Oakland Unified School District, threatening to boycott classes until the district did a better job of protecting students from COVID-19, he acted. KN95 medical masks. Within 12 hours of agreement, OUSD received 10,000 masks and the city of Oakland received 15,000 from Lee’s San Francisco company, Western Gravel and Roofing Supply.