Abstract: An apparatus for soil excavation having a vacuum hose, a vacuum holding tank and at least one air lance and/or water jet, in which a soil beneficiating agent is introduced into the soil during one or more of the steps of the vacuum excavation process.

Abstract: A parallel porting valve assembly having a parallel valve body. The parallel valve body forms an inlet channel cavity and an outlet channel cavity. A plurality of plug valves are each mounted within the parallel valve body between the inlet channel cavity and the outlet channel cavity for selectively permitting an preventing communication between the inlet channel cavity and the outlet channel cavity. An actuator is used to open and close each plug valve.

Abstract: An interchangeable plug valve having a valve body with a first through hole. An outer valve plug having a second through hole. The outer valve plug is rotatably and sealably seated within a first cavity of the valve body. The second through hole of the outer valve plug rotatably aligns with the first through hole of the valve body. The outer valve plug is retained in a seated and sealed position within the valve body. An inner valve plug is non-rotatably and sealably seated within a second cavity of the outer valve plug. A plurality of interchangeable plug valves combine to form a parallel porting valve assembly. The parallel porting valve assembly has a parallel valve body with an inlet channel cavity and an outlet channel cavity. Each interchangeable plug valve has one side of the second through hole of the outer valve plug aligned with the inlet channel cavity and the opposite side of the second through hole of the outer valve plug aligned with the outlet channel cavity of the parallel valve body.