; and (B) technical assistance in implementing such model standards and guidelines for credentialing environmental health workers, which may include providing additional training to assist in hiring practices that encourage hiring workforce staff who— (i) understand and respond to changing demographics; and (ii) promote under-represented populations in reaching effective health solutions. 4. Environmental Health Workforce Development Plan (a) In general To ensure that programs and activities (including education, training, and payment programs) administered by the Department of Health and Human Services for developing the environmental health workforce meet national needs, the Secretary of Health and Human Services shall develop a comprehensive and coordinated plan for such programs and activities that— (1) includes performance measures to determine the extent to which these programs and activities are meeting the Department’s strategic goal of strengthening the environmental health workforce; (2) establishes a strategic goal to strengthen the environmental health workforce using the Healthy People 2020 environmental health workforce objectives of the Department of Health and Human Services as a guide; (3) identifies any gaps in existing programs and activities (as of the date of the plan) with regard to addressing future environmental health workforce needs identified in workforce projections of the Health Resources and Services Administration in collaboration with the Centers for Disease Control and Prevention; (4) recommends actions to address such gaps; (5) identifies best practices to engage underserved communities and promote workforce diversity