A lead paint risk assessor shall perform environmental sampling in accordance with the technical standards and environmental sampling requirements set forth in this regulation. A lead paint risk assessor shall submit a paint chip, soil, or dust wipe sample for analysis to a laboratory: Recognized by the U.S. Environmental Protection Agency under 15 U.S.C. §2685(b) as accredited under the National Lead Laboratory Accreditation Program; and That demonstrates it can achieve a quantitation limit equal to or less than: 20 percent of the lowest level of lead content in paint that constitutes a lead-containing substance, as stated in COMAR 26.16.01.02B; 20 percent of the lowest action level or regulatory limit for lead content in soil established under 40 CFR §745.65(c) or a more stringent standard published by the Department; or 50 percent of the lowest level of lead content in dust that constitutes lead-contaminated dust, as stated in COMAR 26.16.02.02B. A lead paint risk assessor shall perform dust wipe sampling in accordance with the ASTM E1728/E1728M-20 standard. A lead paint risk assessor shall perform XRF sampling on a painted surface using a calibrated instrument in accordance with COMAR 26.16.05.06B and the ISO/IEC 17025:2017(E) standard. A lead paint risk assessor shall perform paint chip sampling: Only on a surface with deteriorated paint or a defect, or other painted surface as determined necessary by the lead paint risk assessor; After a dust wipe sample is collected to prevent cross-contamination of dust present on a surface near the area where the paint chip was sampled; and In accordance with the ASTM E1729-16 standard and COMAR 26.16.05.06C. A lead paint risk assessor shall perform composite soil sampling in accordance with the ASTM E1727-16 standard. If a tap water sample is collected by a lead paint risk assessor, the lead paint risk assessor shall submit the tap water sample to a laboratory certified by the Department to analyze drinking water samples for lead. A lead paint risk assessor shall perform the sampling of a secondary source using: An environmental sampling method appropriate to detect lead content in the secondary source; or XRF sampling, using a calibrated instrument in accordance with COMAR 26.16.05.06B and the ISO/IEC 17025:2017(E) standard.