X0303 4 2010-02-25 0001282398 WCA WASTE CORP WCAA 0001294275 CASALINOVA CHARLES A ONE RIVERWAY SUITE 1400 HOUSTON TX 77056 0 1 0 0 Sr. VP & CFO Common Stock 2010-02-25 4 F 0 774 4.42 D 323980 D Represents shares of the issuer's common stock surrendered to satisfy the tax withholding obligation of the reporting person on vesting of restricted stock. Tom J. Fatjo, III, attorney-in-fact 2010-03-01