https://www.osha.gov/dcsp/vpp/all_about_vpp.html https://www.osha.gov/dcsp/vpp/all_about_vpp.html http://www.conocophillips.com/sustainable-development/safety-health/operating-safely/Documents/hse-policy.pdf http://www.conocophillips.com/sustainable-development/safety-health/operating-safely/Documents/hse-policy.pdf We maintain a multi-tiered risk based HSE audit program encompassing regulatory and management system compliance audits at both the corporate and business unit levels.