Enviro-Well is a well drilling lubricant for monitor wells and core sampling. It contains no heavy metals, metallics or hydrocarbons. The product does contain graphite and talc-high solids to make for a thickened silicone lubricant. Its order number is EWG1.  A gallon of Enviro-Well weighs approximately 10 pounds. For more information, contact your distributor or Merrill at 1-800-831-6962.www.merrillmfg.com