This standard addresses process descriptions@ process validation@ cleanliness control and monitoring@ recontamination prevention@ quality assurance as follows: PROCESSES DESCRIPTIONS@ including - Detergent cleaning - Alcohol cleaning - Ultrapure water cleaning - Liquid boundary layer disruption cleaning - Multiple solvent cleaning (JPL procedure) - Vacuum bakeout - Supercritical fluids cleaning - Carbon dioxide snow cleaning - Plasma cleaning - Pyrolysis - Criteria for selecting other ovel processes PROCESS VALIDATION - Test material selection - Preparation of test materials for process application - Deposition of contaminants - Description of test conditions - Verification of cleanliness level CLEANLINESS CONTROL AND MONITORING@ including - Micro ano imaging techniques - Spectrometry techniques - Spectroscopy techniques - Chromatography techniques RECONTAMINATION PREVENTION - Packaging systems - Protective covers - Storage QUALITY ASSURANCE This standard may be tailored for the specific characteristic and constrains of a space project in conformance with ECSS-S-ST-00.