support the trenching assembly 13 the work machine 12 shown in fig1 comprises a tractor having wheels 17 however one skilled in the art will appreciated that a tracked vehicle or a pedestrian work machine may be used with the trenching assembly 13 of the present invention the system further comprises a vacuum system 18 as shown the vacuum system 18 is mounted on the work machine 12 and on the trenching assembly 13 as an integrated single mobile unit alternatively the vacuum system 18 may be a subsystem that can be controlled by the work machine 12 or remote control the vacuum system 18 comprises a vacuum hose 20 a spoils inlet 22 and a vacuum power unit not shown further the vacuum system may comprise a cyclonic filtration system not shown to filter fine dust and increase power unit life the spoils inlet 22 is attached to the trenching assembly 13 as shown a second spoils inlet 23 is also attached to the trenching assembly 13 near a trench cleaner 50 one skilled in the art can appreciate that one or more spoils inlets 22 23 may be placed on the frame to efficiently remove accumulated spoils from the trenching assembly 13 in fig1 portions of the vacuum hose 20 are not shown but the hose should be understood to be continuous to each of the spoils inlets 22 23 an operator station 24 is provided to control operation of the system 10 with reference now to fig2 another embodiment of the trenching assembly 13 is shown a control panel 26 is provided to control the trenching assembly 13 the attachment frame 16 is movably supported by the work vehicle 12 not shown and adapted to support the linkage assembly 15 and frame 14 the.