job site trailer again a gear pump tends to be employed for the transfer in the prior art gear transfer pump positive displacement pump at some point another gear transfer pump may be employed to pump the asphalt emulsion material from the temporary transport tank to an on site slurry machine for mixing the asphalt emulsion with an appropriate aggregate prior to laying down the slurry that comprises the asphalt emulsion and the aggregate it is believed by the inventors herein that multiple pump cycles using gear pumps with each cycle imparting additional stress pressure and shear to the asphalt emulsion also contributes to a higher incidence of asphalt particles coalescing from the suspension altering the asphalt emulsion formulas may help in some cases however some asphalt emulsion formulas particularly those involving tire rubber modified asphalt emulsion cannot be significantly altered in these cases it is highly desirable to find other techniques for asphalt handling in order to reduce the incidence of asphalt emulsion spoiling in accordance with one or more embodiments of the invention a diaphragm transfer pump is employed instead to transfer the asphalt emulsion particularly the tire rubber modified asphalt emulsion upon realizing that the use of gear pumps is a significant factor contributing to asphalt emulsion spoilage the inventors herein attempted to use other types of pumps to alleviate the spoilage issue instead of attempting to change the asphalt emulsion formulas to satisfy the high stress high shear requirements of gear pumps when centrifugal pumps are attempted it has been discovered that centrifugal pumps tend to create foam which then causes the centrifugal pump to lose prime or at least efficiency during pumping in one or more embodiments of the invention one or more diaphragm pumps may.