An air-operated pump system comprising: an air-operated pump and a leak detection and containment assembly; the air-operated pump comprising: a pump body, a process liquid pathway defined at least in part by the pump body, an air pathway defined at least in part by the pump body, wherein the process liquid pathway and air pathway are fluidly separated from one another within the pump body, and wherein air passing along the air pathway causes pumping of the process liquid along the process liquid pathway; and the leak detection and containment assembly being integrated with the pump body and comprising: a coupling element disposed at a proximal end of the leak detection and containment assembly, a process liquid sensor configured to sense process liquid leaked from the process liquid pathway into the air pathway, a shutoff valve communicatively coupled to the process liquid sensor and configured to close in response to the process liquid sensor detecting process fluid to contain the leaked process liquid within the pump body and the assembly, and a muffler disposed at a distal end of the leak detection and containment assembly; wherein the shutoff valve and the process liquid sensor are disposed between the coupling element and the muffler; the leak detection and containment assembly is disposed along the air pathway and downstream from an air outlet of the pump body and defines a linear section of the air pathway of the air-operated pump between the coupling element and the muffler; and the process liquid sensor is located below a bottom of a main air channel on the air pathway, whereby the process liquid sensor is out of a direct line of exhaust flow on the main air channel of the air pathway. an air-operated pump and a leak detection and containment assembly; the air-operated pump comprising: a pump body, a process liquid pathway defined at least in part by the pump body, an air pathway defined at least in part by the pump body, wherein the process liquid pathway and air pathway are fluidly separated from one another within the pump body, and wherein air passing along the air pathway causes pumping of the process liquid along the process liquid pathway; and a pump body, a process liquid pathway defined at least in part by the pump body, an air pathway defined at least in part by the pump body, wherein the process liquid pathway and air pathway are fluidly separated from one another within the pump body, and wherein air passing along the air pathway causes pumping of the process liquid along the process liquid pathway; and the leak detection and containment assembly being integrated with the pump body and comprising: a coupling element disposed at a proximal end of the leak detection and containment assembly, a process liquid sensor configured to sense process liquid leaked from the process liquid pathway into the air pathway, a shutoff valve communicatively coupled to the process liquid sensor and configured to close in response to the process liquid sensor detecting process fluid to contain the leaked process liquid within the pump body and the assembly, and a muffler disposed at a distal end of the leak detection and containment assembly; wherein a coupling element disposed at a proximal end of the leak detection and containment assembly, a process liquid sensor configured to sense process liquid leaked from the process liquid pathway into the air pathway, a shutoff valve communicatively coupled to the process liquid sensor and configured to close in response to the process liquid sensor detecting process fluid to contain the leaked process liquid within the pump body and the assembly, and a muffler disposed at a distal end of the leak detection and containment assembly; wherein the shutoff valve and the process liquid sensor are disposed between the coupling element and the muffler; the leak detection and containment assembly is disposed along the air pathway and downstream from an air outlet of the pump body and defines a linear section of the air pathway of the air-operated pump between the coupling element and the muffler; and the process liquid sensor is located below a bottom of a main air channel on the air pathway, whereby the process liquid sensor is out of a direct line of exhaust flow on the main air channel of the air pathway.