One Query with different arguments per post type

I know that I can perform a query for multiple post types by using in the query arguments:

post_type = array(‘post’, ‘custom_post_type’) etc etc.

Is there a way to combine different arguments though, for different post types in one query?

Specifically, I have the custom post type “event” which has a “_end_ts” meta value which is a timestamp of the event end time and I have the following queries:

$args_normal_qry = array(
'post_type' => $'post',
'orderby' =>'date',
'order' => 'DESC',
'post_status' => 'publish');

$normal query = new WP_Query( $args_normal_qry );

and

$args_event_qry = array( 'post_type' => 'event',
'post_status' =>'publish',
'meta_query' => array(
'key' => '_end_ts',
'value' =>(current_time('timestamp') - 14400),
'compare' => '>=',
'type'=>'numeric' ),
'orderby' => 'meta_value_num',
'order' => 'ASC',
'meta_key' => '_end_ts',
'meta_value' => (current_time('timestamp')-14400),
'meta_value_num' => (current_time('timestamp')-14400),
'meta_compare' => '>=' );

$event_query = new WP_Query($args_event_qry );

I wish to display BOTH normal posts AND event posts, retrieved by the two queries (leave out the “events” that have “ended” 4 hours ago – this is performed by the arguments in the second query above).

Is there a way to do that?

Thanks for any info – tips – guidance.