A short-term study was conducted after the oil spillage from the tanker Tasman Spirit to analyse seawater and sand samples taken from Karachi beach for hydrocarbon/organic contents. Blood samples were collected from people who were working or living in the vicinity of the beach. Lymphocyte and eosinophil levels were slightly increased. About 11 people had raised serum glutamic pyruvic transaminase, but this was not significant. Such steps are vital to ensure that there are no long-term hazardous effects of oil on human health.