Si la evaluación de los riesgos es muy importante en el monitoreo ambiental. los daños de la erosión de los suelos, la perdida de las costas, la salinización de las aguas, esto se incluye en la labor del monitoreo.
Risk assessment studies are varied. Depending on your objectives, environmental media (water, soil, vegetables etc) and the chemical parameters of interest. Information in literature regarding daily dose (exposure dose), reference dose values which you need to use to calculate the hazard quotient, hazard index etc are scattered in different individual studies. You may have to search for the information you are interested in for your study.
There are many considerations. Collins Tay, above is correct. Also, the regulatory requirements for compliance if applicable will greatly influence your choices. So it's a big set of questions to evaluate the requirements.