Wisconsin is poised to become the fourth to enact an ethanol blend requirement for gasoline. The state assembly last week passed a measure that will require all 87-octane gasoline to contain 10 percent ethanol by October 1, 2006. The state senate will vote on the bill after the holidays and if it passes the governor is expected to sign it. The three other states that already have ethanol mandates are Minnesota, Montana and Hawaii. According to the American Coalition for Ethanol, Minnesota’s E10 requirement has been on the books since 1997 and Hawaii’s will go into effect this coming April. Montana’s E10 law is contingent upon having 40 million gallons per year of in-state production capacity. Several other states, such as Missouri, have legislation in the works.