Procedure - test length is 20 minutes, four of the five explosives must be detected, only one false alert is allowed, no nudging with the paw, nose, etc., of the explosive sample is allowed, canine should only be rewarded for correct alerts made on explosive samples identified by the handler. If the EDDT fails the first test, a second test is given. If second test is failed, the EDDT will not be allowed to work on IRS contract until completion of remedial training and recertification.Evaluation of Test Results