def remove_st_less_than(dataframe, column='ST', less_than=0.001):
    """
    Remove any entry with an ST less than specified

    Args:
        dataframe (pandas.Dataframe): dataframe containing sensitivity analysis output
        column (str): Column name, default is 'ST'
        less_than (float): Remove anything less than this

    Returns:
        New dataframe.
    """

    new_df = dataframe[dataframe[column] > less_than]

    return new_df