Your search Ottawa Silica Company, Inc., Petitioner, v. National Labor Relations Board, Respondent.andcylinder Gas, Etc., Employees Local No. 283 Teamsters, Intervenor.cylinder Gas, Etc., Employees Local No. 283 Teamsters, Petitioner, v. National Labor Relations Board, Respondent,andottawa Silica Company, Inc., Intervenor did not match any document.