The purpose of this notice is to withdraw NPRM 71-3 (36 F.R. 12309) which would amend §§ 192.485 and 192.487 of the natural gas pipeline safety regulations. On July 20, 1971, a public hearing was held to give interested persons an opportunity to present new material on corrosion pitting or to demonstrate that the proposed criteria set out in NPRM 71-3 were Inappropriate. After analyzing the material and comments presented it became apparent that the amendments as proposed were inappropriate for several reasons. As a result, the Department has reevaluated the proposal and decided by this action to withdraw the proposed amendments in NPRM 71-3.