Keywords: monitoring Systems: groundwater Substances: Acemetacin (FSQKKOOTNAMONP-UHFFFAOYSA-N) 1-[(4-Chlorophenyl)phenylmethyl]piperazine (UZKBSZSTDQSMDR UHFFFAOYSA-N) AMDOPH (IRTZMJWVZQYURE-UHFFFAOYSA-N)