New isotopic and chemical data on the sodium bicarbonate water and associated gases from the
Razdolnoe Spa located in the coastal zone of Primorsky Kray of the Russian Far East, together with previous
stable isotope data (d18O, dD, d13C), allow elucidation of the origin and evolution of the groundwater
and gases from the spa. The water is characterized by low temperature (12 C), TDS – 2.5–6.0 g/L, high
contents of B (5 mg/L) and F (4.5 mg/L) and low contents of Cl and SO4