SAT CTLR CONCERNED WITH LOA PROCS BTWN SAT AND AUS TRACONS.

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THE FOLLOWING PROC WAS A CONTRIBUTING FACTOR IN THE LAST OPERROR HERE AT SAT; AND I SUBMIT THIS IN AN EFFORT TO AVERT ANY MORE SUCH INCIDENTS. INHERENTLY; ZHU SEPARATES HIGH PERFORMANCE ACFT DEPARTING AUS AND SAT AIRSPACE RESPECTIVELY. HOWEVER; SAT HAS BEEN FORCED TO WORK AUS SBOUND DEP TFC AS OVERFLTS. I SAY FORCED; BECAUSE SAT ALLIANCE COM HAS FOR 2 YRS UNSUCCESSFULLY ATTEMPTED TO RESOLVE THIS MATTER. NOT ONLY DOES THIS PROC DELAY ACFT; IT COMPROMISES THE INTEGRITY OF THE SAT OP BY UNNECESSARILY CREATING CONFLICT WITH SAT; RND; SKF AND SSF ARRS AND DEPS. THE FOLLOWING IS ONE OF MANY EXAMPLES THAT HAVE BECOME INTOLERABLE. AUS APPREQ'S KEEPING AN HS25 (ACFT X REQUESTING FL330) AT 5000 FT; BELOW A T34 (ACFT Y LNDG RND) AT 6000 FT. I RESPOND BY INSTRUCTING THE CTLR THAT HE NEEDS TO SEPARATE THESE ACFT IN AN EFFICIENT MANNER AND ACCORDING TO LOA. CONTRARY TO MY INSTRUCTION; HE HANDS OFF THESE ACFT AS REQUESTED CREATING SEVERAL CONFLICTS. I IMMEDIATELY TURN THE T34 TO 180 DEGS; ENSURING SEPARATION. I START TO STEP UP THE HS25. STEP UP IN REF TO 2 ARR CARRIERS AND 3 DEP CARRIERS; ONE DEP; AN ACR; WAS DELAYED 20 MI TO ENSURE SAFETY. THIS PROC CREATES UNDUE PERIL FOR ACFT AND THE SAT CTLING WORKFORCE. THEREFORE; I SUGGEST THAT THIS PROC BE DISCONTINUED IMMEDIATELY AND THAT ZHU DO THEIR JOB BY SEPARATING AUS AND SAT DEPS WITHOUT FURTHER IMPEDING THE SAT OP.