GAED, or Gravimetric Adsorption Energy Distribution, from Activated Carbon Services - PACS is a test to determine the best carbon and remaining service in carbon applications. Based on Polanyi-Dubinin-Manes-Greenbank, it provides low-cost, high-impact information for what carbon to purchase and when to change it out. It provides distribution of adsorption energy-binding sites and high to low energies with volumes. Every molecule removed from water or air requires a minimum energy-binding site in calories per cc. It provides isotherms — nine orders of concentrations and three orders of loading capacity. A two-day short course is provided in conjunction with the biannual International Activated Carbon Conference. A typical GAED report is 28 to 30 pages. 800-367-2587; www.pacslabs.com