Heres a copy of the column in question. 

AUDITTIMESTAMP

1087846893579

1087924923734

1104764681188

1104732392516

1087846893610

1104741005453

1087846893657

1104693744344

1104741246891

1087846893735

I'm using this statement to see the dates, but I can't get it to work with deleting any records over 30 days old. 

SELECT DATEADD(hh, - 05, DATEADD(ss, AUDITTIMESTAMP / 1000, '01/01/1970')) AS ts, *

Thanks