Small diameter dual pump pollutant recovery system

DETAILED DESCRIPTION OF THE INVENTION AND PREFERRED EMBODIMENTS In FIG.
1, a small diameter well pipe 62 of approximately 4 inches diameter and having a slotted screen sidewall is shown extending from the earth's surface 51 down through pollutant bearing soil 43 into the aquifier 44 and bedrock 45.
The top of the normal non-disturbed level of the groundwater table is indicated at 49.
In the figure, the water table level has been reduced by action of the water pump 3 to create a cone of depression of the water to level 48 with the well at the apex of the cone.
A cone of dewatered aquifer 69 remains above the cone of depression of the water table.
The immiscible pollutant 46 of lower density than water is shown riding atop the water and has taken on the depressed cone shape of the water.
Below the top of the depressed water level 48 the well is shown filled with water 67.
The depressed level may exceed several feet vertically thereby forming a cone several tens to hundreds of feet laterally.
Water pump motor 2 is shown joined to water pump 3 in the water pump and motor assembly 1.
The water pump and motor assembly 1 is rigidly connected to the pollutant pump and motor assembly 6 by a short section of pipe 5 which is integrally connected to the pollutant pump and motor assembly and which also serves to deliver the exhaust water from the water pump 3 into the pollutant pump and motor assembly 6 where it flows around the casing surrounding the pollutant pump motor and pollutant pump before exiting the top of the pollutant pump and motor assembly 6 into riser pipe 25 to which the pollutant pump and motor assembly 6 is joined.
The riser pipe 25, which is made up of sections joined by couplings 26, suspends the pollutant pump and motor assembly 6 and the water pump and motor assembly 1 in the well.
The electrical supply cable 20 for the pump motors runs down the inside of the riser pipe 25 to the top of pollutant pump and motor assembly 6.
The electrical power supply cable 4 for the water pump motor 2 runs from the bottom of pollutant pump and motor assembly 6 to the electrical motor connection of the water pump motor at 10