Remediation bladder pump features a flexible bladder capable of suction. This allows the pump to operate in low submergence conditions and is positioned above the fluid column in conjunction with a product skimming attachment. The bladder provides a barrier between the liquid and the drive air preventing volatile gas emissions. When it is used for total fluids pumping, the separation of drive air from the fluid eliminates metals precipitation. The bladder pump is converted to a positive displacement gas drive pump by replacing the bladder with a dip tube assembly.