1. A. An inspection for lead-contaminated dust shall be conducted in accordance with COMAR 26.16.02.03 by a State-accredited visual inspector or risk assessor.
2. B. Risk reduction certificates based on dust sampling shall include a visual review of all interior and exterior painted surfaces of the rental dwelling unit to verify there is no chipping, peeling, or flaking paint.

3. C. Lead dust samples shall be collected using the following tools:

   1. (1) A template or method of marking a measured area on floors, window sills, and window wells;
   2. (2) Wipes meeting the requirements of Regulation .06C(5)(b) of this chapter;
   3. (3) Nonsterilized nonpowdered latex or similar disposable gloves;
   4. (4) Nonsterilized 50 milliliter polyethylene centrifuge tubes with caps;
   5. (5) Dust sample collection forms;
   6. (6) Masking tape; and
   7. (7) Trash bags.

4. D. All lead dust wipe inspections shall include field blank samples collected in accordance with ASTM Standard E1728 at a minimum frequency of:

   1. (1) 5 percent per day or one blank sample for every 20 samples collected; and
   2. (2) In no case fewer than one blank sample for each day of inspections.
5. E. Dust wipe samples shall be collected in accordance with ASTM Standard E 1728 or equivalent.
6. F. If using a pre-measured template, thoroughly clean the template with a wipe as specified in Regulation .06C(5)(b) of this chapter between each use.

7. G. Laboratory Analytical Procedure.

   1. (1) Samples shall be submitted to an NLLAP approved laboratory for analysis.
   2. (2) The field sample number shall be entered on the field sampling form, laboratory submittal form, and the container.
   3. (3) The name of the laboratory, date the samples were sent to the laboratory, and names of all personnel handling the sample from the time of collection to the time of arrival at the laboratory shall be recorded on a chain of custody form.

Authority: Environment Article, §§1-404, 6-801—6-852, 6-1001—6-1005, and 7-206—7-208, Annotated Code of Maryland

Effective date: May 19, 2008 (35:10 Md. R. 974)

Regulation .01 amended effective July 1, 2020 (476:13 Md. R. 643)

Regulation .02B amended effective July 1, 2020 (476:13 Md. R. 643)

Regulation .03 amended effective June 18, 2018 (45:12 Md. R. 620); July 1, 2020 (476:13 Md. R. 643)

Regulation .07 amended effective February 23, 2009 (36:4 Md. R. 356)

Regulation .08 amended as an emergency provision effective January 1, 2012 (38:27 Md. R. 1762); amended permanently effective April 30, 2012 (39:8 Md. R. 536)

Regulation .09D amended effective June 18, 2018 (45:12 Md. R. 620)

Regulation .10A, B amended effective July 1, 2020 (476:13 Md. R. 643)

Regulation .12B, C amended effective July 1, 2020 (476:13 Md. R. 643)