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You may find this chapter on groundwater from WHO's "Water Quality Assessments - A Guide to Use of Biota, Sediments and Water in Environmental Monitoring - Second Edition" useful: https://www.who.int/water_sanitation_health/resourcesquality/wqachapter9.pdf

And chapters 10 & 11 of Michael Price's Introducing Groundwater: https://books.google.mu/books?id=G0mN7qi1jdIC&pg=PA144&source=gbs_toc_r&cad=4#v=onepage&q&f=false