Abstract: Technologies for producing sampling and analysis plans for evaluating airborne chemical hazards are disclosed. These technologies obtain scenario data indicative of emission of an airborne chemical at a site with a human population; simulate, as a function of the scenario data, emission of the chemical at the site and transport and dispersion of a plume of the chemical across the site in space and time; assess an extent to which concentrations of the chemical in the airborne plume encounter areas containing people, as a function of time and projected human activity and movement across the site; determine, based on the simulation and assessment, recommended sampler device locations to obtain a target quality and target quantity of samples of the chemical for use in a sampling and analysis plan to determine an effect of the chemical on the human population at the site; and present the recommended sampler device locations.

Abstract: The present invention provides a sound barrier system 10 including a sound barrier panel 20 having a face skin panel 30 held in spaced relation from a back skin panel 40 by a filler material 50. Each sound barrier panel 20 is provided with a tongue and groove design that permits panels 20 to be stacked in an interlocking fashion without fastening hardware.

Abstract: The present invention provides a sound barrier system 10 including a sound barrier panel 20 having a face skin panel 30 held in spaced relation from a back skin panel 40 by a filler material 50. Each sound barrier panel 20 is provided with a tongue and groove design that permits panels 20 to be stacked in an interlocking fashion without fastening hardware.