Immediate Delete

Hello,
Possibly stupid question, but is there any way to operate a "delete immediately" on some particular files?
I have a program that generates a set of files fairly regularly. Once they are in the Trash they are not needed and they take up quite a bit of space. I don't want to just trigger an empty trash on size as I want other things to remain for 30 days in case of accidents etc.
Fortunately the files have a specific extension so they are easily selected.
Possibly stupid question, but is there any way to operate a "delete immediately" on some particular files?
I have a program that generates a set of files fairly regularly. Once they are in the Trash they are not needed and they take up quite a bit of space. I don't want to just trigger an empty trash on size as I want other things to remain for 30 days in case of accidents etc.
Fortunately the files have a specific extension so they are easily selected.