The Archdiocese of Philadelphia has released a set of directives for re-opening the churches of the diocese (obviously including Holy Cross). The information is attached here.
I’m going to recommend that you tune in to a recorded edition of a webinar hosted by our Office for Divine Worship here, for a very fine presentation of the details in the document. Or just check it out right below.
You can be forewarned: the webinar session is about 90 minutes long; but you can view it in pieces obviously as you have the time, or fast-forward through the bits you already have in hand.