... arsenic On-Site, Titration-method, Merckoquandt, calcium, magnesium, ferrous Iron, manga-nese, phosphate, nitrate On-Site, Reflectometric-method, Reflectoquandt, BOD Off-Site, Dilution-method ... inter-action of the tidal regimes of the South Chinese Sea and of the Gulf of Thailand eliminate each other. Here, the tidal amplitude is less than 10 cm. Because of its lower elevation se-vere ... Reflectoquandt, BOD Off-Site, Dilution-method COD Off-Site, Dichromate-method E.coli, total coliform Off-Site, MPN-method (ISO 930 8-2 ) heavy metals Off-Site, AAS 15table 3: ground water classification...