Sonic is a fast, clean, low-impact drilling technology.  Combining powerful sonic drill heads with a variety of carrier vehicle options, sonic rigs can drill and sample clay, silt, sand, and gravel, with high production, superior sample quality, and enhanced safety.   Sandstone, limestone, siltstone, and other coarse, competent deposits can be drilled with Roto-Sonic drill heads, using water, mud or air.  High production, drill crew safety, clean work areas, low site impact, low noise, and quality cores make sonic the technology of choice for a variety of drilling applications.