WASTE MANAGEMENT<WMX> TO RAISE CHEMLAWN<CHEM>BID Waste Management Inc said it sent a letter to the ChemLawn Corp board, saying it is prepared to increase its bid for ChemLawn to 33 dlrs a share, from 27 dlrs, if ChemLawn promptly negotiates and executes a simple two-step merger agreement containing only essential covenants and conditions. Upon such an agreement, Waste Management said, it would amend its 27 dlrs a share cash tender offer.