Soiled/Soiling : The accumulation of materials that are not considered hazardous materials, body fluids, or CBRN terrorism agents but that could degrade the performance of the ensemble or ensemble element
NFPA 1851 Standard on Selection, Care, and Maintenance of Protective Ensembles for Structural Fire Fighting and Proximity Fire Fighting, 2008 ed. http://www.gearwash.com/pdf/NFPA-1851-2014-Edition -List-of-Changes.pdf, (Std: Selection, Care and Maint of Prot Ens for Stru Fr Fight and Proximity Fr Fight - Amer) {411 NFC}