Issue 4: To update normative references, incorporate revised "boilerplate" language from NSF/ANSI 2, correct an error in 6.1 - Cleaning and sanitization procedures, and allow the use of ColiScan MF and CHROMagarTM as equivalent, alternate, selective media to Chromocult for the recovery and enumeration of Escherichia coli 11229 for the In Place Cleaning assay.