FEATURES

5 PETROLEUM DOWN UNDER

13 SIGMA’S 50TH ANNIVERSARY—A LOOK BACK, AND FORWARD
HISTORY: THE 80s

28 2008 SIGMA/NPN/OPIS EXECUTIVE LEADERHIP CONFERENCE

31 GOING GREEN: GREEN FUELS, GREEN VEHICLES, GREEN ENERGY

COLUMNS

02 viewpoint
SPRING FORWARD

39 inside biodiesel
DO NOT LOSE SIGHT OF BIOHEAT

43 conventions
MAKE YOUR VOICE HEARD
SIGMA SUMMER LEGISLATIVE MEETING

45 inside leadership
BEING CURIOUS

47 inside mobile refueling
HIGHER FUEL COSTS MEAN MORE ISSUES - TURNING A NEGATIVE INTO A POSITIVE

DEPARTMENTS

THANK YOU SIGMAPAC CONTRIBUTORS

42 UPCOMING MEETINGS

56 ADVERTISERS INDEX

SPECIAL INSERT: 2008 Statistical Report

May-June 2008 Issue

On the cover:

Participants in the SIGMA's Australia Study Tour