In this article are some helpful resources on the EPA's 3T's approach to establishing a lead testing program.
The Environmental Protection Agency (EPA) developed the 3Ts approach for reducing lead in drinking water in schools and child care facilities. Below are link to various manuals and the website on the program to help guide you.
EPA's 3T Website: https://www.epa.gov/ground-water-and-drinking-water/3ts-reducing-lead-drinking-water
EPA 3Ts for Reducing Lead in Drinking Water in Schools and Child Care Facilities - PDF Manual: https://www.epa.gov/system/files/documents/2021-07/epa-3ts-guidance-document-english.pdf
EPA 3Ts Checklist: https://www.epa.gov/system/files/documents/2021-07/3ts_checklist_establishing_a_program_508_0.pdf