…The 2015 Sales of Odorized Propane Report survey materials have been mailed by the American Petroleum Institute (API). The due date for returning the survey is April 18. Each company will receive a personalized survey that includes a unique identifier. Materials are mailed in an API envelope that states, “Enclosed is your 2015 Sales of Propane Report. Those responding are reminded to return both pages of the survey form. All companies that complete the survey will receive a copy of the 2014 report this June.”…