NEW YORK (S&P Global Ratings) May 9, 2016--S&P Global Ratings today assigned its 'A-' issue-level rating to U.S.-based waste services company Waste Management Inc.'s proposed $500 million senior unsecured notes due 2023. Waste Management intends to use the net proceeds from this offering, along with cash on hand if necessary, to repay $500 million of principal on its outstanding 2.6% senior notes when they mature in September 2016. All of our other ratings on Waste Management are unchanged. For our complete corporate credit rating rationale, please see the summary on Waste Management Inc., published Oct. 1, 2015, on RatingsDirect. RELATED CRITERIA AND RESEARCH Related Criteria Liquidity Descriptors For Global Corporate Issuers, Dec. 16, 2014 Key Credit Factors For The Environmental