A CTLR WORKING CLRNC DELIVERY POS ISSUED AN IFR CLRNC TO AN FK50 WITH A CLB TO 5000 FT. THE PLT READ BACK CLB TO 15000 FT. THE ERROR WAS NOT CAUGHT BY THE CTLR. AFTER TKOF; THE FK50 RPTED ON INITIAL CONTACT WITH DEP CTL THAT THEY WERE CLBING TO 15000 FT. AGAIN THE INCORRECT READBACK WENT UNDETECTED. SEPARATION LOSS OCCURRED SHORTLY THEREAFTER WITH AN ARRIVING ACR AT 7000 FT.

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FALCON JET CALLED CLRNC DELIVERY FOR OUTBOUND IFR CLRNC. CLRNC WAS ISSUED INCLUDING SID DEP TO MAINTAIN 5000 FT. PLT READ BACK 'ONE FIVE THOUSAND.' READBACK OF WRONG ALT NOT DETECTED. FALCON JET DEPARTED; BEGAN CLBING TO 15000 FT (INSTEAD OF 5000 FT). ACR ARR SW OF ARPT PRESENTLY LEVEL AT 7000 FT INBOUND ON VECTORS. FALCON JET WENT OVER TO DEP CTL; STILL CLBING. DEP CTLR DID NOT CATCH RIGHT AWAY THAT PLT WAS CLBING THROUGH 5000 FT. FALCON JET AT 6700 FT AND 1 MI AWAY FROM ACR AT CLOSEST POINT. FALCON JET SAID LATER HE HAD THE ACR IN SIGHT AT ALL TIMES. FACTORS: FALCON JET NOT A REGULAR USER OF THIS ARPT; POSSIBLY UNFAMILIAR WITH THE SID. CLRNC DELIVERY MISSED READBACK OF WRONG ALT. DEP CTLR INITIALLY MISSED THE FACT THE ACFT CLBED THROUGH 5000 FT. IT IS REQUIRED AT THIS ARPT THAT WHEN ISSUING THE SID (WHICH IS ISSUED TO ALL IFR DEPS AT 5000 FT AND ABOVE) THE CTLR STATE 'MAINTAIN 5000 FT.' THE SID ALSO CLRLY STATES THAT ALL ACFT ARE TO MAINTAIN 5000 FT AND EXPECT FURTHER CLRNC 10 MINS AFTER DEP.