a system for applying a liquid , such as a deicing liquid , to a surface material , such as soil , sand , gravel , concrete , and asphalt . the system includes a mat possessing an array of upstanding tubular members and a pipe system maintained in the interstitial regions between the tubular members . in addition , a series of ports or nozzles may extend upwardly from the pipe such that the liquid drips or is sprayed on the surface of the material .