Document ppzN8qMEngarONMY6QE1NJ5V6

Lorraine Twerdok American Petroleum Institute 1220 L Street, N.W. Washington, DC 20005 June 8, 2005 Our ref: Shell BHRC Contract Amendment Shell Chemical LP One Shell Plaza 910 Louisiana Houston, TX 77002-4916 Tel +1 713 241 2521 Fax +1 713 241 3325 Email patsy.clegg@shell.com Internet http://www.shell.com/chemicals Dear Lorraine; Enclosed, please find the executed contract amendment for the Benzene Health Research Consortium. Kind regards Shell Chemical LP Patsy Clegg Product Steward Attachment: Contract Amendment CC w /0 attachment: Stacy Methvin BC w / attachment: HSSE ARS - Benzene China Study { FILENAME \* FirstCap \* MERGE FORMAT } SHELL-MCCLURG-065719