However, employees who have access to the compensation information of other employees or applicants as a part of their essential job functions cannot disclose the pay of other employees or applicants to individuals who do not otherwise have access to compensation information, unless the disclosure is (a) in response to a formal complaint or charge, (b) in furtherance of an investigation, proceeding, hearing, or action, including an investigation conducted by the employer, or (c) consistent with the contractor's legal duty to furnish information. Operate several types of basic laboratory equipment such as, but not limited to, pH meter, conductivity meter, analytical balance, hardness tester, disintegration apparatus, tap density, particle size, water activity and moisture balance.