THE FAILURE OF THE PILOT/APPLICANT OF THE R22B, N621SG, TO FOLLOW LOW APPROACH PROCEDURES, AND THE FAILURE OF THE DESIGNATED EXAMINER/OBSERVER IN THE R22B TO MAINTAIN VISUAL SEPARATION FROM THE CESSNA 152, N5532Q. CONTRIBUTING FACTORS TO THE ACCIDENT WERE: THE INSUFFICIENT RESPONSE OF BOTH PILOTS OF THE R22B IN REPLY TO TRAFFIC INFORMATION, THE LOCAL CONTROLLER'S FAILURE TO OBTAIN POSITIVE CONFIRMATION OF VISUAL ACQUISITION OF THE CESSNA 152 FROM THE PILOTS OF THE R22B, AND THE FAILURE OF THE LOCAL CONTROLLER TO REMAIN ATTENTIVE TO THE CONVERGING TRAFFIC AND ISSUE APPROPRIATE INSTRUCTIONS TO AVOID THE COLLISION.