KLGB is Class D when the ATCT is open. LAX Class B floor is overlying KLGB at 5000. There is a gap between the top of the Class D and the Class B but turbine a/c do not need to reach FL180 to exit Class E airspace initially. Directly over LAX at 14500 would seem to a safe spot but the LOOP8 DP at LAX makes this a highly risky spot to loiter without ATC advisories since departures are climbing between 10000 and FL180 over the airport. Numerous heavy aircraft= high wake encounter risk. My opinion only your mileage may vary.
http://155.178.201.160/d-tpp/1608/00237LOOP.PDF