Identified Risk Oil and gas properties are too widely dispersed and too numerous to be examined for physical existence. The rights and obligations of Chevron to all its properties reflected in the account. Management's estimates of proved crude oil and natural gas reserves, impairments to PP&E. I/R H M H Risk Assessment C/R H M H Assessed RMM H M H Materiality Performance materiality= $599 millions (25% Planning materiality)