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Hello All, I have soil contamination criteria for both toxicity and vapor emissions. My question is what information can I draw about VOC content from the results of a TPH test? If I get a hit in the gasoline range of EPA 8015B, is it possible that the results from EPA 8260 (assuming same soil...

Hello! I've been working for 5 years solid in the geotech/environmental field (landfills, mine waste, tailings ponds, contaminated sites etc), and kind of lost interest in things that "stand still", like piles of dirt and concrete. I find myself fascinated by antennas, electromagnetism, and...

Thanks molerat! I agree. I think the basic question has more to do with assuring that quality data is obtained from money spent on the field investigation. In other words how can the geotechnical engineer quantifiably demonstrate that the needed information will be obtained other than saying...

Hi, I am a junior engineer working on a project for a public client and the EPA. The client is used to dealing with environmental data, contamination, remediation goals etc. Now that some soils testing is needed they are asking for data quality objectives (DQOs), a "geotech SAPP/QAPP", and...

Looking for some guidance on how to specify an appropriate saturation load for a time-rate of consolidation test on very soft soil with low hydraulic conductivity. Anyone know of any? Thanks!

One of our geotech subs has included a graph of axial strain vs. volumetric strain in a triaxial CD test report. I need to calculate poisson's ratio for the material, but I don't think volumetric strain vs. axial strain depicts the same relationship that poisson's ratio is meant to describe...

Thanks moe333! That is what I suspected. There is no supporting documentation accompanying the CPT results. These tests were performed in very soft mine tailings. Unsually soft even for tailings because the coars fraction was screened and removed, so I am actually confused by the higher Phi...

Hello All, Would anyone be able to explain why there would be results for friction angle for just a single CPT? I have output from a data forensics software package and am wondering if the different values for Phi'(1), Phi'(2), etc. just represent different methods of correlating CPT raw data...

Hello, I am working on a project that involves relocation of a waste rock pile consiting of material with diameters up to 6-12 inches. Most of the material is very large, only a small fraction appear to be fines. Is there a way to determine the grain size distribution of this material for...

Ok where are my fellow landfill designers? I am experimenting with a somewhat non-conventional cover for a non-rcra site. The thought is to have the upper-most layer be 24" of gravel (Configuration 1). It seems that as soon as I switch the top layer in HELP3 to a highly permeable material...