Direct Push Probing, DPP, is a geotechnical drilling and environmental drilling company based in Perth Western Australia offering a one-stop service for Geo-environmental site investigations including; Soil samples - both geotechnical and environmental Gas samples - environmental Groundwater samples - both geotechnical and environmental Installing monitoring wells - both geotechnical and environmental SPT - geotechnical DPP uses a powerful 7822DT, a 6625CPT and two Geoprobe 6620DT rigs to undertake soil, gas and groundwater sampling as well as SPT and CPTu (piezocone) along with the installation of monitoring wells. These capabilities are complemented by a small custom-built rig designed for work in narrow and low clearance sites.