def east_valley(parcels):
    """
    Dummy for presence in East Valley.

    """
    in_ev = parcels['mpa'].isin([
        'AJ', 'CA', 'CC', 'CH', 'FH', 'FM', 'GC', 'GI',
        'GU', 'ME', 'PA', 'QC', 'SA', 'SC', 'TE'
    ])
    return (parcels['is_MC'] & in_ev).astype(int)