Forensic Analyses Articles

  • Case study - NAPL forensics analysis at tank farm in Boston

    Ambient Engineering, Inc. (Concord, MA) used Sitelab to investigate and remediate a former tank farm along Boston Harbor contaminated by a large, subsurface plume of commingled diesel fuel and No. 6 fuel oil. Loading racks (above) are suspected to have contributed to most of the site’s contamination. Light Non Aqueous Phase Liquids (LNAPL) collected from 40 monitoring wells were tested ...


    By Sitelab Corporation

  • Case study - Oklahoma crude oil forensic analysis

    An oil company used Sitelab’s laboratory to perform oil forensic analysis testing crude oils from different well sites to determine the percentage of oil content from two formations. The wells tap into these zones at different depths, thousands of feet below the ground. Knowing what type of oil being pumped is important. All six oil samples had similar GRO content, but the PAH content in ...


    By Sitelab Corporation

  • Case study - NAPL forensics analysis at refinery site in Kansas

    An environmental consultant at Subsurface Environmental Solutions, LLC used Sitelab to fingerprint a large plume of Non Aqueous Phase Liquids (NAPL) located at a former oil refinery in Kansas. The plume is commingled with gasoline, diesel, crude oil and other petroleum products. Sitelab’s portable UVF-3100D analyzer is fitted with optical filters which can measure the C6 to C10 gasoline ...


    By Sitelab Corporation

  • Forensic engineering applied to the analysis of a gas explosion in a residential building

    Present paper deals with the identification of the cause of an explosion in a hollow space positioned below a residential building as the result of welding operations. On field investigation clearly demonstrated that the explosion was due to the ignition of a flammable atmosphere in the basement of the building. Along the trial two hypotheses were brought to the judge: (a) explosion of an ...


    By Inderscience Publishers

  • Identification of forensic fabrics using a portable Raman spectrometer

    At a crime scene, a police officer collects a fiber sample that may prove to be invaluable evidence in identifying a criminal or exonerating an innocent person. While FTIR has been used for analysis in the past, the strong absorption of the fabric or the glass slide where it is mounted makes the spectrum very hard to interpret. In recent years, Raman spectroscopy has been studied extensively for ...


    By B&W Tek

  • In response to O'Reilly et al. (2014)

    Coal‐tar‐based pavement sealant, a black liquid that is sprayed or painted on asphalt pavement, typically is 15 to 35% by weight coal tar or low‐ or high‐temperature coal‐tar pitch. USGS, other governmental, and academic research that has concluded that coal‐tar‐based pavement sealants are a major source of urban PAHs have relied on a wide array of forensic methods. Published academic and ...


    By John Wiley & Sons, Ltd.

  • Development of advanced Raman spectroscopy methods and databases for the evaluation of trace evidence and the examination of questioned documents - Phase II

    Abstract: Researchers from the City University of New York, West Virginia University, the New York Police Department Crime Lab, and The Metropolitan Museum of Art have formed a multidisciplinary collaboration to further the application of Raman spectroscopy and non-destructive surface-enhanced Raman scattering (SERS) analysis techniques as applied to the evaluation of trace evidence ...


    By AcuTech Scientific Inc.

  • The use of portable and handheld Raman spectroscopy for forensic investigations

    The Raman technique is gaining widespread acceptance as an investigative tool for forensic applications. This article focuses on the use of portable and handheld Raman spectroscopy in the field of forensic science and illustrates it with real-world examples. The benefits of Raman spectroscopy are well recognized for the molecular identification of unknown molecular compounds and as a result the ...


    By B&W Tek

  • Precellys application focus forensic - case study

    Forensic laboratories working with hard samples such as hair [1, 2J, bone [3], teeth, skin, etc. experience difficulties with DNA extraction due to the high energy needed to grind these tissues. Moreover, biological evidence is available in small quantities and the current techniques used do not provide high quality results. The Precellys homogenizers provides high speed sample disruption based ...

  • Response to O'Reilly et al. (2014)

    Recently, O'Reilly et al. (2014) provided a review of environmental forensic techniques for source characterization and identification of pyrogenic polycyclic aromatic hydrocarbons (PAHs) in sediments. They also provided an example case study pertaining to refined tar‐based sealers [commonly known as coal tar‐based sealants (CT‐sealants)] to support their contention that CT‐sealants are not a ...


    By John Wiley & Sons, Ltd.

  • Minnesota I35W steel bridge collapse: lessons learned and challenges revealed

    This article discusses an independent investigation and associated forensic analysis of the old Minneapolis highway I35W Bridge that collapsed on 1 August 2007, which is based on a thorough examination of the original design drawings, a series of detailed 2D/3D finite elements computations of the bridge and the material evidences disclosed by National Safety Transportation Safety Board (NTSB) ...


    By Inderscience Publishers

  • A forensic study at an abandoned service station along the New Jersey shore: How the mixed leads can help

    In the late 1990s, a real estate developer purchased an abandoned service station at a sheriff’s sale. The site was located on the barrier island near Atlantic City, New Jersey. The service station had been owned previously by an independent operator. That owner purchased the property from a major oil company in 1983. Our client, the real estate developer, never operated the service ...


  • FORENSIC study at a Northern New Jersey service station: the mixing of old and new gasoline

    In 2000, a client purchased a gasoline service station in northern New Jersey. A few days after receiving possession of the property, he received a letter from a State regulatory agency informing him that an investigation surrounding a leaking waste oil UST was required. He was unaware that a waste oil UST had existed; automotive repairs were not part of his or the previous owner’s business ...


  • A forensic study to differentiate two dissolved gasoline plumes at adjoining service stations

    Three gasoline service stations are present at a highway intersection in central New Jersey. In the mid- to late- 1980s, service station “B” began to notice large discrepancies in their gasoline inventory. The USTs were removed in 1988 and a significant release was discovered. Separate-phase gasoline, as much as 1.5 feet (0.5 m) thick was present on the water table for about an area ...


  • Application of chemometry for identification of the source of plutonium

    Isotope correlations and chemometry using Principal Component Analysis (PCA) have been used on the experimental data on Pu from different kinds of reactors, e.g. research, power reactors with low and high burn-up as well as for fuels with different 235U content. It is demonstrated that the combined use of isotope correlations and PCA is a powerful tool to ...


    By Inderscience Publishers

  • A comparison of four commercially available portable Raman spectrometers

    Abstract The objective of this presentation is to discuss the results of the evaluation studies conducted on four commercially available field-portable Raman spectrometers. The data presented in this comparison will affect the forensic science community by assisting a prospective user in determining which portable Raman device may best suit their agency’s needs. This presentation ...


    By AcuTech Scientific Inc.

  • Environmental forensics: courting science?

    Forensics and hydrology are two terms that may not seem to go together well. To the uninitiated, this combination may evoke images of the crime scene investigation that ensues when some patsy goes into the drink wearing cement overshoes. Rather, the term environmental forensics, essentially the parent discipline of forensic hydrology, has found its way into contemporary parlance owing to ...


    By Hargis + Associates Inc

  • The 2007 analysis of information remaining on disks offered for sale on the second hand market

    The purpose of this on-going research has been to gain an understanding of the information that remains on disposed hard disks and to determine the level of damage that could, potentially be caused, if the information fell into the wrong hands. The study examines disks that have been obtained in a number of countries to determine whether there is any detectable national or regional variance in ...


    By Inderscience Publishers

  • Methodology for Forensic Investigation of Potable Water Quality in Municipal Distribution Systems

    Abstract During routine regulatory potable water quality sampling in distribution systems related to the Total Coliform Rule, utilities can sometimes experience anomalous detections of total coliform bacteria and/or fecal coliform bacteria in the distribution system samples. Frequently, the regulatory-required retesting of the same sample locations reveals no detection of bacteria, and thus ...

  • INFRARED TECHNOLOGY - It`s Use in Forensic Building Science to Solve Moisture Intrusion Problems

    This paper will focus discussion on the building envelope, the science behind the inspection, techniques for inspection, and verification of the findings. Because much of our work is pioneering, we will end by addressing the question 'Where do we go from here?' WHY USE INFRAREDA picture says a thousand words; infrared thermography is the only diagnostic technology that lets you instantly ...

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