Intercomparison of in situ measurements of petroleum hydrocarbons using a cone penetrometer deployed laser induced fluorescence (LIF) sensor with conventional laboratory-based measurements

Results are presented from a comprehensive field validation effort in which measurements from a cone penetrometer deployed laser-induced fluorescence (LIF) sensor are compared directly with results from conventional laboratory based chemical analyses of samples collected using traditional methods. In order to minimize spatial and temporal variability associated with sampling, discrete samples were collected immediately after push measurements by overdrilling the push hole with a hollow stem auger and collecting soil samples with a split spoon sampler. All discrete samples were analyzed by EPA methods 418.1, Total Recoverable Petroleum Hydrocarbons (TRPH) and EPA method 8015, Total Petroleum Hydrocarbons (TPH)