A 10-year review of operations at the Lehigh Southwest Cement property in unincorporated Cupertino identified more than 2,100 violations resulting in millions of dollars in fines and penalties. These violations at the local, state and federal regulatory level occurred between Jan. 1, 2012 and Dec. 31, 2021. … At the local level, the most significant violations at Lehigh’s Cupertino plant include extensive sediment pollution along Permanente Creek and the unpermitted expansion of an emergency access road leading through Cupertino to the plant. Lehigh also removed 35 protected trees along the road.