Purchasing and Warehouse Contact Information Home » Contact Us » Contact Information » Purchasing and Warehouse Purchasing HoursMonday – Thursday6:30 am to 4:00 pmFriday 6:30 am to 3:00 pmWarehouse HoursMonday – Thursday6:30 am to 4:00 pm Friday6:30 am to 3:00 pmContact Informationpurchasing@unionsanitary.ca.govwarehouse@unionsanitary.ca.gov510-477-7509 FaxUnion Sanitary District Attn: Purchasing5072 Benson RoadUnion City, CA 94587