Existing studies on carbaryl and chlorpyrifos contaminations within a golf course, Leam Chabang International Country Club, were analyzed by means of gas chromatography. Soil samples from 4 selected stations (with 4 bores each) at 3 soil depth levels (0-5, 5-10 and 10-20 cms.) were collected 4 times during rainy season (September-October, 1992) and cold season (December, 1992-January, 1993). Some other related parameters for soil analysis were also conducted followed the ASA-SSSA, 1982. Chlorpyrifos contents of the soil samples, less than 0.001 mg/kg, were recorded at all stations during the monthly sampling period (October, December, 1992 and January, 1993) including the sand bunker station adjacent to the 3B Green site. The average chlorpyrifos residues in soils of all 3 depths in almost sampling stations recorded for the September, 1992 varied from nd-0.053, nd-0.021 and nd-0.014 mg/kg in the given depth order. In addition, it was found that the carbaryl content in the soil samples collected from the sampling stations during the whole studied period was also non-detectable (less than 0.001 mg/kg). Therefore, it should be reported that the two used chemicals residues in the golf course were less than 0.001 mg/kg especially the carbaryl content was lower than the permissible level, 0.05 mg/kg as proposed by the USSR (1973)
