Abstract: Vertical and/or horizontal perforated pipes are embedded in the soil around an area of the earth which has been contaminated by a spill and these pipes are connected in a closed portable system with a pressure pump in series with an evacuator having a separator and scrubber. Thus some of the perforated pipes, preferably those surrounding the contaminated area, can have a flushing fluid forced into the soil below the area to flush out the contamination, and the other perforated pipes in and near the bottom of the contaminated soil in the area can be connected to the evacuators for sucking out the contaminated flushing fluid. The engine for driving the pump may be an internal combustion engine, an electric motor, or a hydraulic motor connected by pipes to a remote motor pump generator when noise and/or fire hazard is involved. The system maintains a positive pressure on the input perforated pipes and a negative pressure on the outlet perforated pipes.

Abstract: An apparatus constructable in situ for filtering pollutants from a flowing creek or stream, comprising one or more adjacent and/or cascaded flume-type boxes supported by the stream bed, each of which boxes comprises parallel sides, top and bottom spacers, at least one upwardly sloping ramp between the sides to form a weir edge, and one or more replaceable porous trays containing a filtering or pollutant-removing medium located directly beneath the weir edge. A slotted cover for the trays uniformly distributes the stream's contaminated water over and onto the filtering medium and a screen bottom for the trays retains the filter medium therein. The apparatus is positioned in the stream so that all the water in the stream will flow into the box or boxes, up the ramp, over the weir edge or edges, and downwardly through the filter trays before resuming its course along the stream bed.