http://archive-server.liveatc.net/kb...2019-1800Z.mp3
The VFR departure request from 32L followed by an IFR pickup is agreed by the ground controller at 12:10 onwards. To join the NRVNA1 Sid - meaning a right pattern downwind would be expected. The base turn, not expected unless being vectored North to join the transition after the Sid directly ALPSE (almost due North).
Renton and Seattle Tacoma Airspace mean that is is not possible to fly a standard square pattern at KBFI without entering their airspace. Very heavy swept wing jets don’t fly tight circuits.