Hopf Environmental Consulting offers high resolution site mapping using Membrane Interface Probe (MIP) technology.  Cross sections derived from MIP technology have the potential to be more accurate than data collected from traditional sampling techniques.  Traditionally soil and groundwater samples are collected at select intervals and sent to a fixed laboratory for analysis.  The analytical results are typically accurate, but the cost per sample is relatively high.  As a result, it is rare to collect data from each soil interval.  For example, soil samples may only be collected from the 2-4 ft, 8-10 ft, and 18-20 ft intervals.  Using field screening tools such as a Photo Ionization Detector or a Flame Ionization Detector, rough estimations can be made about the soil intervals not sent to the laboratory for analysis.

 

MIP technology utilizes a PID, FID, and electron capture detector (ECD).  In general both the PID and FID works well to detect the presence of petroleum hydrocarbons and some halogenated compounds.  The ECD responds well to halogenated and chlorinated compounds such as the dry cleaning solvent tetrachlorethylene (PCE or perc) and it’s degradation products.  Soil type (sand, silt, and clay) is tracked with a built in electrical conductivity meter.  Based on the percentage of sand, silt, and clay the soil type can be determined (examples: silty clay, loam, sand).

 

To learn more about MIP technology, visit Columbia Technologies web-site.