Anomaly Detection in Soil Heavy Metal Contamination Using Unsupervised Learning for Environmental Risk Assessment. - Isaac Tettey Adjokatse; Samuel Senyo Koranteng; George Yamoah Afrifa; Theophilus Ansah-Narh; Marcellin Atemkeng; Joseph Bremang Tandoh; Kow Ahor Essel-Yorke; Richmond Opoku-Sarkodie; Rebecca Davis (CoRR, 2026)