Built on the success of its Clean Standard: K-12, the new ISSA Clean Standard applies to general institutional and commercial facilities, such as office buildings, retail stores, hotels and similar facilities.   The new standard derives from the former ISSA Clean Standard: K-12, issued in October 2013, which provides a protocol for assessing cleaning effectiveness in schools. The ISSA Clean Standard: K-12 is based on extensive independent scientific research, conducted by the Cleaning Industry R...