A tank comprising: a top surface ; a solid bottom surface opposite the top surface , the solid bottom surface having a non-zero slope relative to a horizontal support surface; a motor assembly coupled to the solid bottom surface of the tank ; a wall fixed between the solid bottom surface and the top surface ; an aperture arranged in the wall of the tank , the aperture arranged proximate a lowest portion of the solid bottom surface of the tank ; and a scraper blade assembly comprising: a blade rotatably coupled to the tank , the blade disposed at substantially the same slope as the solid bottom surface of the tank ; wherein when the blade is rotatably displaced along the solid bottom surface of the tank the blade displaces solids deposited on the solid bottom surface of the tank in a direction towards the aperture and out through the portion of the aperture arranged at the lowest portion of the slope of the bottom surface of the tank , characterized in that the motor assembly comprises a hydraulic motor removeably couplable to a portable hydraulic power unit arranged proximate to the tank via one or more hydraulic lines (806(A), 806(B)), wherein the hydraulic lines (806(A), 806(B)) are removably couplable to the hydraulic power unit and/or the hydraulic motor via quick disconnect hydraulic fittings. a top surface ; a solid bottom surface opposite the top surface , the solid bottom surface having a non-zero slope relative to a horizontal support surface; a motor assembly coupled to the solid bottom surface of the tank ; a wall fixed between the solid bottom surface and the top surface ; an aperture arranged in the wall of the tank , the aperture arranged proximate a lowest portion of the solid bottom surface of the tank ; and a scraper blade assembly comprising: a blade rotatably coupled to the tank , the blade disposed at substantially the same slope as the solid bottom surface of the tank ; wherein when the blade is rotatably displaced along the solid bottom surface of the tank the blade displaces solids deposited on the solid bottom surface of the tank in a direction towards the aperture and out through the portion of the aperture arranged at the lowest portion of the slope of the bottom surface of the tank , characterized in that the motor assembly comprises a hydraulic motor removeably couplable to a portable hydraulic power unit arranged proximate to the tank via one or more hydraulic lines (806(A), 806(B)), wherein the hydraulic lines (806(A), 806(B)) are removably couplable to the hydraulic power unit and/or the hydraulic motor via quick disconnect hydraulic fittings. a blade rotatably coupled to the tank , the blade disposed at substantially the same slope as the solid bottom surface of the tank ; wherein when the blade is rotatably displaced along the solid bottom surface of the tank the blade displaces solids deposited on the solid bottom surface of the tank in a direction towards the aperture and out through the portion of the aperture arranged at the lowest portion of the slope of the bottom surface of the tank , characterized in that the motor assembly comprises a hydraulic motor removeably couplable to a portable hydraulic power unit arranged proximate to the tank via one or more hydraulic lines (806(A), 806(B)), wherein the hydraulic lines (806(A), 806(B)) are removably couplable to the hydraulic power unit and/or the hydraulic motor via quick disconnect hydraulic fittings. <EOS>