Conduct TCP testing in accordance with test procedure . Ensure that the drill rig mobilized to the drill site is equipped with test equipment that conforms to the test procedure. Use a hammer with an automated trip mechanism to regulate the fall of the hammer to 24 in. plus or minus 1/2 in.

TCP values described in this manual are either the total number of blows necessary to drive the cone 12 in. or the distance the cone advances in inches in 100 blows.