The techniques that QROS uses for heavy metals and hydrocarbons are both recognised by the NHBC as sophisticated field instruments. In the case of hydrocarbons QROS uses its unique QED hydrocarbon analyser. Using ultra violet fluorescence (UVF) the QED yields unsurpassed hydrocarbon contamination information from a field instrument. For heavy metals rapid testing is conducted using a hand held x-ray fluorescence (XRF) analyser giving real time data on at least 11 heavy metals.
NHBC guidance for the safe development of housing on land affected by contamination recommends that laboratory testing is carried out to a level of competency accredited by UKAS or MCerts. Whilst acknowledging and agreeing with the NHBC recommendation that on-site testing is validated using MCerts verified laboratory analysis, this is a time consuming process taking a week to 10 days. Often all that is required at the pre-acquisition stage is that you know what you are purchasing. At this stage the information provided by any on-site testing is for your use and does not need to be verified by any other laboratory . Once development starts validation of subsequent on-site testing with MCerts verified analysis becomes essential- although only a small number of samples need laboratory analysis.