/// <summary>
        /// gets the list of chemicals from 'keresek' table
        /// </summary>
        /// <param name="userId">DB identifier of user</param>
        /// <param name="area">area of the user</param>
        /// <returns></returns>
        public List <string> getUserConnectedChemThreats(string area)
        {
            List <string> result = new List <string>();

            try
            {
                param = new KeyValuePair <string, string>("@area", area);
            }
            catch (Exception e)
            {
                throw new ErrorServiceProfileDetailsManage("Az adatbázis felé a kérés megalkotása sikertelen (ModPersonThreats) "
                                                           + e.Message);
            }
            mdi.openConnection();
            result = mdi.execPrepGetOneColumnToListWithKVP(queryToGetChemicalThreaths, param);
            mdi.closeConnection();
            return(result);
        }