section of flexible hose conduit 503 into the corresponding slot 104 of lateral conveyor section 103 the inlet 504 of silica dust collection hose 115 b is disposed proximate the outlet of flexible hose 503 the suction produced by silica dust control unit 106 gathers silica dust generated during the transfer of sand which in turns moves to silica dust control unit 106 for filtering through manifold 108 the configuration and operation of silica dust collection hoses 115 a 115 b 115 c and 115 d which respectively collect silica dust from the discharge points of trailer conveyors 102 a 102 b 102 c and 102 d into lateral conveyor section 103 are similar silica dust collection hoses 116 a 116 d and the suction generated by silica dust control unit 106 collect silica dust generated by the lifting and discharge of sand by discharge conveyor section 105 as shown in fig5 c silica dust collection hoses 116 a 116 d extend from apertures through the body of discharge conveyor section 105 at selected spaced apart points during operation silica dust generated as sand moves upwards towards the outlet spout is removed through silica dust collection hoses 116 a 116 d and manifold 108 for filtering by silica dust control unit 106 fig5 c also one possible configuration for flexible 117 with respect to the spout of upwardly angled conveyor 105 generally the intake end of flexible hose 117 is located near the discharge point of the spout of conveyor 105.