In this chapter, the following documents are incorporated by reference: General requirements for the competence of testing and calibration laboratories (ISO/IEC 17025:2017(E)); The U.S. Department of Housing and Urban Development Guidelines for the Evaluation and Control of Lead-Based Paint Hazards in Housing (Second Edition, July, 2012), Chapter 16: Investigation and Treatment of Dwellings that House Children with Elevated Blood Lead Levels; Standard Practice for Collection of Settled Dust Samples Using Wipe Sampling Methods for Subsequent Lead Determination (ASTM Standard E1728/E1728M-20, 2020 Edition); Standard Practice for Field Collection of Dried Paint Samples for Subsequent Lead Determination (ASTM E1729-16, 2016 Edition); and Standard Practice for Field Collection of Soil Samples for Subsequent Lead Determination (ASTM E1727-16, 2016 Edition). The document incorporated by reference in §A(2) of this regulation will be referred to in this chapter as HUD Guidelines, Chapter 16.