| 摘要 |
A two pump skimmer system for recovery of lighter-than-water hydrocarbons from water wells. A water pump is used to depress the water table and a contaminant pump is used to remove the hydrocarbons. The pumps are located in individual chambers which are interconnected, with the water chamber below the hydrocarbon chamber and with limited one-way flow into the water chamber. Both pumps are independently controlled by sensors in the upper chamber to assure that each pumps only the proper liquid.
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