Narrative:

For the last 20 plus years hhr departures and lax arrivals were considered a safe event. But recently we were briefed that we can't run hhr departures and lax arrivals at the same time when it's IFR. There was a hole on the arrival final and I was of the understanding that we can release the hhr departure when the last lax arrival is abeam the airport. I called the tower and they said the departure was holding short so I released him a little early assuming he would take the runway when the arrival was abeam the airport. Go back to the old procedures there is nothing unsafe about this.

Google
 

Original NASA ASRS Text

Title: SCT TRACON Controller reported concern related to a new departure/arrival separation procedure between HHR and LAX properly.

Narrative: For the last 20 plus years HHR departures and LAX arrivals were considered a safe event. But recently we were briefed that we can't run HHR departures and LAX arrivals at the same time when it's IFR. There was a hole on the arrival final and I was of the understanding that we can release the HHR departure when the last LAX arrival is abeam the airport. I called the Tower and they said the departure was holding short so I released him a little early assuming he would take the runway when the arrival was abeam the airport. Go back to the old procedures there is nothing unsafe about this.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.