; and (ii) satisfies the requirements established by the Secretary of Health and Human Services for the Toxic Special Exposure Cohort under section 3671A. . (d) Clarification of toxic substance exposure for covered illnesses Section 3675(c)(1) of the Energy Employees Occupational Illness Compensation Program Act of 2000 ( 42 U.S.C. 7385s–4(c)(1) ) is amended by inserting (including chemicals or combinations or mixtures of a toxic substance, including heavy metals, and radiation) after toxic substance each place such term appears. 3. Providing information regarding Department of Energy facilities Subtitle E of the Energy Employees Occupational Illness Compensation Program Act of 2000 ( 42 U.S.C. 7385s et seq.) is amended by inserting after section 3681 the following: 3681A. Completion and updates of site exposure matrices (a) Definition In this section, the term site exposure matrices means an exposure assessment of a Department of Energy facility that identifies— (1) the toxic substances or processes that were commonly used in each building or process of the facility, including the trade name (if any) of the substance