�ݺ�ߣshows by User: csandau

�ݺ�ߣshows by User: csandau / http://www.slideshare.net/images/logo.gif �ݺ�ߣshows by User: csandau / Fri, 17 Jan 2020 17:05:14 GMT �ݺ�ߣShare feed for �ݺ�ߣshows by User: csandau Use of GCxGC-TOFMS in litigious mixed condensate plumes: Environmental forensics case study - Multidimensional Chromatography Workshop /csandau/use-of-gcxgctofms-in-litigious-mixed-condensate-plumes-environmental-forensics-case-study-multidimensional-chromatography-workshop chemmattmdcworkshop2020hawaii-200117170514
Authors: Court D. Sandau and Lisa N. Kates Chemistry Matters Inc. Abstract; Condensate is a complex mixture of light petroleum hydrocarbons that is primarily used to dilute heavy crude oil for transport through pipelines. Many heavy oils, especially bitumen from the oil sands in northern Alberta, use condensate to dilute the bitumen to allow the product to flow to refineries where the oil can be upgraded. This is where the term ‘Dilbit’ was derived. Condensate is valuable; it can be recycled and reused and is frequently transported through the North American pipeline network. Pipelines gather at pipeline terminals where there can be multiple sources and multiple suppliers of different types of condensates. When leaks occur at these terminals, it can be difficult to determine the exact source of the leak, especially if pipeline integrity seems intact. GCxGC-TOFMS is the ideal technique to examine mixed condensate plumes as it allows the comprehensive fingerprint of the condensate to be determined and simultaneously provides substantial data to evaluate weathering and plume movement. In addition, the amount of chemicals measured using GCxGC-TOFMS can allow source apportionment of multiple sources so that allocation of the cleanup responsibility can be made. This presentation will discuss the use of GCxGC-TOFMS in legal case studies involving mixed condensate plumes. Real scenarios of condensate plumes will be presented showing how GCxGC-TOFMS data clarified the results compared to conventional analysis. This presentation will also cover the hurdles of using a novel and unconventional technique for litigation proceedings.]]>
Authors: Court D. Sandau and Lisa N. Kates Chemistry Matters Inc. Abstract; Condensate is a complex mixture of light petroleum hydrocarbons that is primarily used to dilute heavy crude oil for transport through pipelines. Many heavy oils, especially bitumen from the oil sands in northern Alberta, use condensate to dilute the bitumen to allow the product to flow to refineries where the oil can be upgraded. This is where the term ‘Dilbit’ was derived. Condensate is valuable; it can be recycled and reused and is frequently transported through the North American pipeline network. Pipelines gather at pipeline terminals where there can be multiple sources and multiple suppliers of different types of condensates. When leaks occur at these terminals, it can be difficult to determine the exact source of the leak, especially if pipeline integrity seems intact. GCxGC-TOFMS is the ideal technique to examine mixed condensate plumes as it allows the comprehensive fingerprint of the condensate to be determined and simultaneously provides substantial data to evaluate weathering and plume movement. In addition, the amount of chemicals measured using GCxGC-TOFMS can allow source apportionment of multiple sources so that allocation of the cleanup responsibility can be made. This presentation will discuss the use of GCxGC-TOFMS in legal case studies involving mixed condensate plumes. Real scenarios of condensate plumes will be presented showing how GCxGC-TOFMS data clarified the results compared to conventional analysis. This presentation will also cover the hurdles of using a novel and unconventional technique for litigation proceedings.]]> Fri, 17 Jan 2020 17:05:14 GMT /csandau/use-of-gcxgctofms-in-litigious-mixed-condensate-plumes-environmental-forensics-case-study-multidimensional-chromatography-workshop csandau@slideshare.net(csandau) Use of GCxGC-TOFMS in litigious mixed condensate plumes: Environmental forensics case study - Multidimensional Chromatography Workshop csandau Authors: Court D. Sandau and Lisa N. Kates Chemistry Matters Inc. Abstract; Condensate is a complex mixture of light petroleum hydrocarbons that is primarily used to dilute heavy crude oil for transport through pipelines. Many heavy oils, especially bitumen from the oil sands in northern Alberta, use condensate to dilute the bitumen to allow the product to flow to refineries where the oil can be upgraded. This is where the term ‘Dilbit’ was derived. Condensate is valuable; it can be recycled and reused and is frequently transported through the North American pipeline network. Pipelines gather at pipeline terminals where there can be multiple sources and multiple suppliers of different types of condensates. When leaks occur at these terminals, it can be difficult to determine the exact source of the leak, especially if pipeline integrity seems intact. GCxGC-TOFMS is the ideal technique to examine mixed condensate plumes as it allows the comprehensive fingerprint of the condensate to be determined and simultaneously provides substantial data to evaluate weathering and plume movement. In addition, the amount of chemicals measured using GCxGC-TOFMS can allow source apportionment of multiple sources so that allocation of the cleanup responsibility can be made. This presentation will discuss the use of GCxGC-TOFMS in legal case studies involving mixed condensate plumes. Real scenarios of condensate plumes will be presented showing how GCxGC-TOFMS data clarified the results compared to conventional analysis. This presentation will also cover the hurdles of using a novel and unconventional technique for litigation proceedings. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/chemmattmdcworkshop2020hawaii-200117170514-thumbnail.jpg?width=120&height=120&fit=bounds" /> Authors: Court D. Sandau and Lisa N. Kates Chemistry Matters Inc. Abstract; Condensate is a complex mixture of light petroleum hydrocarbons that is primarily used to dilute heavy crude oil for transport through pipelines. Many heavy oils, especially bitumen from the oil sands in northern Alberta, use condensate to dilute the bitumen to allow the product to flow to refineries where the oil can be upgraded. This is where the term ‘Dilbit’ was derived. Condensate is valuable; it can be recycled and reused and is frequently transported through the North American pipeline network. Pipelines gather at pipeline terminals where there can be multiple sources and multiple suppliers of different types of condensates. When leaks occur at these terminals, it can be difficult to determine the exact source of the leak, especially if pipeline integrity seems intact. GCxGC-TOFMS is the ideal technique to examine mixed condensate plumes as it allows the comprehensive fingerprint of the condensate to be determined and simultaneously provides substantial data to evaluate weathering and plume movement. In addition, the amount of chemicals measured using GCxGC-TOFMS can allow source apportionment of multiple sources so that allocation of the cleanup responsibility can be made. This presentation will discuss the use of GCxGC-TOFMS in legal case studies involving mixed condensate plumes. Real scenarios of condensate plumes will be presented showing how GCxGC-TOFMS data clarified the results compared to conventional analysis. This presentation will also cover the hurdles of using a novel and unconventional technique for litigation proceedings.

Use of GCxGC-TOFMS in litigious mixed condensate plumes: Environmental forensics case study - Multidimensional Chromatography Workshop from Chemistry Matters Inc.

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0 Fixing False Negatives, Using 2DGC-TOFMS to Correctly Identify Ignitable Liquid Residues (ILRs) in Wildfire Investigations - Pittcon 2019 /slideshow/fixing-false-negatives-using-2dgctofms-to-correctly-identify-ignitable-liquid-residues-ilrs-in-wildfire-investigations-pittcon-2019/138710111 csandaupittcon2019fnlss-190329181250
Wildfires continue to grow in frequency and intensity. Over 80% of wildfires are human caused, with over 20% being attributed to acts of arson. The ability to detect ignitable liquid residues (ILRs) in wildfire debris samples can be very problematic compared to structural fire debris samples. Forensic methods used in the analysis of wildfire debris are complicated by the presence of natural interferences. Wildfires provide exceptionally difficult matrices compared to structural fires due to the facts that: ILRs are present at lower concentrations; ILRs are more dispersed; natural compounds are present at very high concentrations; structural similarity of natural compounds to ILR compounds; and matrix combustion forms other interfering compounds. The resolving power of comprehensive two-dimensional gas chromatography (GCxGC, 2DGC) combined with the sensitivity of a TOF-MS permits superior separation and detection of ILRs compared to conventional gas chromatography (1DGC). The high abundance of natural interferences dwarfs the ILR compounds in size and will mask their detection using conventional 1DGC. As arsonous wildfires can ignite with very low volumes of accelerants, better detection limits are required in order to find and identify ILRs in wildfire debris samples. Case samples analyzed on both 1DGC and 2DGC showed re-analysis by 2DGC changed 7% of negative samples to positive for ILR, and 22% went from tentative to positive for ILR. Inspection of the Stauffer compounds shows some groups are more useful for ILR identification than others. The Three Musketeers Group was ubiquitous, while the Twin Towers and Five Fingers Groups were non-detects by 1DGC but present in up to 90% of positive samples by 2DGC. In addition, the use of 2DGC allows expansion of the targeted list of compounds to expand to all compounds present in gasoline which increase to over 2000 compounds, potentially allowing for gasoline fingerprinting.]]>
Wildfires continue to grow in frequency and intensity. Over 80% of wildfires are human caused, with over 20% being attributed to acts of arson. The ability to detect ignitable liquid residues (ILRs) in wildfire debris samples can be very problematic compared to structural fire debris samples. Forensic methods used in the analysis of wildfire debris are complicated by the presence of natural interferences. Wildfires provide exceptionally difficult matrices compared to structural fires due to the facts that: ILRs are present at lower concentrations; ILRs are more dispersed; natural compounds are present at very high concentrations; structural similarity of natural compounds to ILR compounds; and matrix combustion forms other interfering compounds. The resolving power of comprehensive two-dimensional gas chromatography (GCxGC, 2DGC) combined with the sensitivity of a TOF-MS permits superior separation and detection of ILRs compared to conventional gas chromatography (1DGC). The high abundance of natural interferences dwarfs the ILR compounds in size and will mask their detection using conventional 1DGC. As arsonous wildfires can ignite with very low volumes of accelerants, better detection limits are required in order to find and identify ILRs in wildfire debris samples. Case samples analyzed on both 1DGC and 2DGC showed re-analysis by 2DGC changed 7% of negative samples to positive for ILR, and 22% went from tentative to positive for ILR. Inspection of the Stauffer compounds shows some groups are more useful for ILR identification than others. The Three Musketeers Group was ubiquitous, while the Twin Towers and Five Fingers Groups were non-detects by 1DGC but present in up to 90% of positive samples by 2DGC. In addition, the use of 2DGC allows expansion of the targeted list of compounds to expand to all compounds present in gasoline which increase to over 2000 compounds, potentially allowing for gasoline fingerprinting.]]> Fri, 29 Mar 2019 18:12:50 GMT /slideshow/fixing-false-negatives-using-2dgctofms-to-correctly-identify-ignitable-liquid-residues-ilrs-in-wildfire-investigations-pittcon-2019/138710111 csandau@slideshare.net(csandau) Fixing False Negatives, Using 2DGC-TOFMS to Correctly Identify Ignitable Liquid Residues (ILRs) in Wildfire Investigations - Pittcon 2019 csandau Wildfires continue to grow in frequency and intensity. Over 80% of wildfires are human caused, with over 20% being attributed to acts of arson. The ability to detect ignitable liquid residues (ILRs) in wildfire debris samples can be very problematic compared to structural fire debris samples. Forensic methods used in the analysis of wildfire debris are complicated by the presence of natural interferences. Wildfires provide exceptionally difficult matrices compared to structural fires due to the facts that: ILRs are present at lower concentrations; ILRs are more dispersed; natural compounds are present at very high concentrations; structural similarity of natural compounds to ILR compounds; and matrix combustion forms other interfering compounds. The resolving power of comprehensive two-dimensional gas chromatography (GCxGC, 2DGC) combined with the sensitivity of a TOF-MS permits superior separation and detection of ILRs compared to conventional gas chromatography (1DGC). The high abundance of natural interferences dwarfs the ILR compounds in size and will mask their detection using conventional 1DGC. As arsonous wildfires can ignite with very low volumes of accelerants, better detection limits are required in order to find and identify ILRs in wildfire debris samples. Case samples analyzed on both 1DGC and 2DGC showed re-analysis by 2DGC changed 7% of negative samples to positive for ILR, and 22% went from tentative to positive for ILR. Inspection of the Stauffer compounds shows some groups are more useful for ILR identification than others. The Three Musketeers Group was ubiquitous, while the Twin Towers and Five Fingers Groups were non-detects by 1DGC but present in up to 90% of positive samples by 2DGC. In addition, the use of 2DGC allows expansion of the targeted list of compounds to expand to all compounds present in gasoline which increase to over 2000 compounds, potentially allowing for gasoline fingerprinting. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/csandaupittcon2019fnlss-190329181250-thumbnail.jpg?width=120&height=120&fit=bounds" /> Wildfires continue to grow in frequency and intensity. Over 80% of wildfires are human caused, with over 20% being attributed to acts of arson. The ability to detect ignitable liquid residues (ILRs) in wildfire debris samples can be very problematic compared to structural fire debris samples. Forensic methods used in the analysis of wildfire debris are complicated by the presence of natural interferences. Wildfires provide exceptionally difficult matrices compared to structural fires due to the facts that: ILRs are present at lower concentrations; ILRs are more dispersed; natural compounds are present at very high concentrations; structural similarity of natural compounds to ILR compounds; and matrix combustion forms other interfering compounds. The resolving power of comprehensive two-dimensional gas chromatography (GCxGC, 2DGC) combined with the sensitivity of a TOF-MS permits superior separation and detection of ILRs compared to conventional gas chromatography (1DGC). The high abundance of natural interferences dwarfs the ILR compounds in size and will mask their detection using conventional 1DGC. As arsonous wildfires can ignite with very low volumes of accelerants, better detection limits are required in order to find and identify ILRs in wildfire debris samples. Case samples analyzed on both 1DGC and 2DGC showed re-analysis by 2DGC changed 7% of negative samples to positive for ILR, and 22% went from tentative to positive for ILR. Inspection of the Stauffer compounds shows some groups are more useful for ILR identification than others. The Three Musketeers Group was ubiquitous, while the Twin Towers and Five Fingers Groups were non-detects by 1DGC but present in up to 90% of positive samples by 2DGC. In addition, the use of 2DGC allows expansion of the targeted list of compounds to expand to all compounds present in gasoline which increase to over 2000 compounds, potentially allowing for gasoline fingerprinting.

Fixing False Negatives, Using 2DGC-TOFMS to Correctly Identify Ignitable Liquid Residues (ILRs) in Wildfire Investigations - Pittcon 2019 from Chemistry Matters Inc.

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0 Unscrambling Contaminant Mixtures to Determine their Chemical Fingerprints /slideshow/unscrambling-contaminant-mixtures-to-determine-their-chemical-fingerprints/93798182 csandauenvirotech2018ss-180413140434
Many contaminated sites have mixed plumes or contaminants of concern from multiple potential sources. Examples of mixed plumes could include mixed free phase petroleum plumes (e.g. condensate) or polycyclic aromatic hydrocarbons (PAHs) from crude oil spills mixing with upstream or local anthropogenic sources (storm water runoff) of PAHs in sediments. There are several advanced statistical techniques that can be used to determine the number and different sources of contaminant present on the site. In addition, these statistical tools can also apportion the amount of contaminants in each sample, thereby allowing liability to be distributed according the chemistry of the contaminants and those responsible for the release. Apportionment is important for litigious cases as it allows the calculation of who should pay for what portion of the cleanup. Tools using positive matrix factorization (PMF) have been developed by US EPA but are no longer being supported are still publicly available to use. These techniques can be applied to many different chemical mixtures such as condensates or mixed petroleum hydrocarbon plumes. We have successfully applied the technique to PAHs from sediment data to allocate the source of the PAHs in the sediments to sources identified by the models. Unfortunately, these models are not definitive and provide multiple conclusions depending on their starting point which can make interpretation difficult and sometimes questionable, especially for litigation proceedings. This presentation provides a summary of statistical tools used for chemical fingerprinting as well as the use of PMF and Bayesian modelling in order to provide some guidance on model usage for contaminant apportionment. The models need to be applied conservatively and require chemistry interpretation to elucidate what end members have been identified by the model and if those end members make sense. The models will be applied to a real case study scenarios to demonstrate their application. Lawyers, regulators and environmental professionals involved in spill monitoring and liability determination will find this presentation educational in how these statistical models are able to determine sources and amounts of those sources of contaminants on site. ]]>
Many contaminated sites have mixed plumes or contaminants of concern from multiple potential sources. Examples of mixed plumes could include mixed free phase petroleum plumes (e.g. condensate) or polycyclic aromatic hydrocarbons (PAHs) from crude oil spills mixing with upstream or local anthropogenic sources (storm water runoff) of PAHs in sediments. There are several advanced statistical techniques that can be used to determine the number and different sources of contaminant present on the site. In addition, these statistical tools can also apportion the amount of contaminants in each sample, thereby allowing liability to be distributed according the chemistry of the contaminants and those responsible for the release. Apportionment is important for litigious cases as it allows the calculation of who should pay for what portion of the cleanup. Tools using positive matrix factorization (PMF) have been developed by US EPA but are no longer being supported are still publicly available to use. These techniques can be applied to many different chemical mixtures such as condensates or mixed petroleum hydrocarbon plumes. We have successfully applied the technique to PAHs from sediment data to allocate the source of the PAHs in the sediments to sources identified by the models. Unfortunately, these models are not definitive and provide multiple conclusions depending on their starting point which can make interpretation difficult and sometimes questionable, especially for litigation proceedings. This presentation provides a summary of statistical tools used for chemical fingerprinting as well as the use of PMF and Bayesian modelling in order to provide some guidance on model usage for contaminant apportionment. The models need to be applied conservatively and require chemistry interpretation to elucidate what end members have been identified by the model and if those end members make sense. The models will be applied to a real case study scenarios to demonstrate their application. Lawyers, regulators and environmental professionals involved in spill monitoring and liability determination will find this presentation educational in how these statistical models are able to determine sources and amounts of those sources of contaminants on site. ]]> Fri, 13 Apr 2018 14:04:34 GMT /slideshow/unscrambling-contaminant-mixtures-to-determine-their-chemical-fingerprints/93798182 csandau@slideshare.net(csandau) Unscrambling Contaminant Mixtures to Determine their Chemical Fingerprints csandau Many contaminated sites have mixed plumes or contaminants of concern from multiple potential sources. Examples of mixed plumes could include mixed free phase petroleum plumes (e.g. condensate) or polycyclic aromatic hydrocarbons (PAHs) from crude oil spills mixing with upstream or local anthropogenic sources (storm water runoff) of PAHs in sediments. There are several advanced statistical techniques that can be used to determine the number and different sources of contaminant present on the site. In addition, these statistical tools can also apportion the amount of contaminants in each sample, thereby allowing liability to be distributed according the chemistry of the contaminants and those responsible for the release. Apportionment is important for litigious cases as it allows the calculation of who should pay for what portion of the cleanup. Tools using positive matrix factorization (PMF) have been developed by US EPA but are no longer being supported are still publicly available to use. These techniques can be applied to many different chemical mixtures such as condensates or mixed petroleum hydrocarbon plumes. We have successfully applied the technique to PAHs from sediment data to allocate the source of the PAHs in the sediments to sources identified by the models. Unfortunately, these models are not definitive and provide multiple conclusions depending on their starting point which can make interpretation difficult and sometimes questionable, especially for litigation proceedings. This presentation provides a summary of statistical tools used for chemical fingerprinting as well as the use of PMF and Bayesian modelling in order to provide some guidance on model usage for contaminant apportionment. The models need to be applied conservatively and require chemistry interpretation to elucidate what end members have been identified by the model and if those end members make sense. The models will be applied to a real case study scenarios to demonstrate their application. Lawyers, regulators and environmental professionals involved in spill monitoring and liability determination will find this presentation educational in how these statistical models are able to determine sources and amounts of those sources of contaminants on site. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/csandauenvirotech2018ss-180413140434-thumbnail.jpg?width=120&height=120&fit=bounds" /> Many contaminated sites have mixed plumes or contaminants of concern from multiple potential sources. Examples of mixed plumes could include mixed free phase petroleum plumes (e.g. condensate) or polycyclic aromatic hydrocarbons (PAHs) from crude oil spills mixing with upstream or local anthropogenic sources (storm water runoff) of PAHs in sediments. There are several advanced statistical techniques that can be used to determine the number and different sources of contaminant present on the site. In addition, these statistical tools can also apportion the amount of contaminants in each sample, thereby allowing liability to be distributed according the chemistry of the contaminants and those responsible for the release. Apportionment is important for litigious cases as it allows the calculation of who should pay for what portion of the cleanup. Tools using positive matrix factorization (PMF) have been developed by US EPA but are no longer being supported are still publicly available to use. These techniques can be applied to many different chemical mixtures such as condensates or mixed petroleum hydrocarbon plumes. We have successfully applied the technique to PAHs from sediment data to allocate the source of the PAHs in the sediments to sources identified by the models. Unfortunately, these models are not definitive and provide multiple conclusions depending on their starting point which can make interpretation difficult and sometimes questionable, especially for litigation proceedings. This presentation provides a summary of statistical tools used for chemical fingerprinting as well as the use of PMF and Bayesian modelling in order to provide some guidance on model usage for contaminant apportionment. The models need to be applied conservatively and require chemistry interpretation to elucidate what end members have been identified by the model and if those end members make sense. The models will be applied to a real case study scenarios to demonstrate their application. Lawyers, regulators and environmental professionals involved in spill monitoring and liability determination will find this presentation educational in how these statistical models are able to determine sources and amounts of those sources of contaminants on site.

Unscrambling Contaminant Mixtures to Determine their Chemical Fingerprints from Chemistry Matters Inc.

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0 Whose PAH is this? - Envirotech 2018 /slideshow/whose-pah-is-this-envirotech-2018/93579496 whosepahisthisss-180411173844
River sediment contains natural organic material, largely derived from allochthonous sources, meaning a source from outside the river. This is particularly important when regarding polycyclic aromatic hydrocarbons (PAHs), which can have sources hundreds of kilometers from a sampling point within the river catchment. In fact, every river can contain PAHs from a source other than that which is the focus of a remedial investigation, and consideration of this is very important. Presentation of the detection of PAHs in relation to guidelines is a requirement for regulatory purposes. However, if those PAHs are natural, or at least originate from a source that is unrelated to the investigation, why take responsibility for them? In order to determine the source of PAHs it is important to collect the right kind of samples (fine grained, highly organic sediment), analyse for the right kind of chemical package (include alkylated PAHs), and interpret the results using the right kind of techniques. This presentation will describe the correct, and incorrect use of environmental forensics techniques using example datasets from our work in Canadian oil spill response and US CERCLA investigations. It will focus on how to construct and interpret PAH fingerprints and ratios, and the use of statistics such as PCA. Environmental professionals involved in spill remediation or site monitoring will find this presentation applicable. ]]>
River sediment contains natural organic material, largely derived from allochthonous sources, meaning a source from outside the river. This is particularly important when regarding polycyclic aromatic hydrocarbons (PAHs), which can have sources hundreds of kilometers from a sampling point within the river catchment. In fact, every river can contain PAHs from a source other than that which is the focus of a remedial investigation, and consideration of this is very important. Presentation of the detection of PAHs in relation to guidelines is a requirement for regulatory purposes. However, if those PAHs are natural, or at least originate from a source that is unrelated to the investigation, why take responsibility for them? In order to determine the source of PAHs it is important to collect the right kind of samples (fine grained, highly organic sediment), analyse for the right kind of chemical package (include alkylated PAHs), and interpret the results using the right kind of techniques. This presentation will describe the correct, and incorrect use of environmental forensics techniques using example datasets from our work in Canadian oil spill response and US CERCLA investigations. It will focus on how to construct and interpret PAH fingerprints and ratios, and the use of statistics such as PCA. Environmental professionals involved in spill remediation or site monitoring will find this presentation applicable. ]]> Wed, 11 Apr 2018 17:38:44 GMT /slideshow/whose-pah-is-this-envirotech-2018/93579496 csandau@slideshare.net(csandau) Whose PAH is this? - Envirotech 2018 csandau River sediment contains natural organic material, largely derived from allochthonous sources, meaning a source from outside the river. This is particularly important when regarding polycyclic aromatic hydrocarbons (PAHs), which can have sources hundreds of kilometers from a sampling point within the river catchment. In fact, every river can contain PAHs from a source other than that which is the focus of a remedial investigation, and consideration of this is very important. Presentation of the detection of PAHs in relation to guidelines is a requirement for regulatory purposes. However, if those PAHs are natural, or at least originate from a source that is unrelated to the investigation, why take responsibility for them? In order to determine the source of PAHs it is important to collect the right kind of samples (fine grained, highly organic sediment), analyse for the right kind of chemical package (include alkylated PAHs), and interpret the results using the right kind of techniques. This presentation will describe the correct, and incorrect use of environmental forensics techniques using example datasets from our work in Canadian oil spill response and US CERCLA investigations. It will focus on how to construct and interpret PAH fingerprints and ratios, and the use of statistics such as PCA. Environmental professionals involved in spill remediation or site monitoring will find this presentation applicable. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/whosepahisthisss-180411173844-thumbnail.jpg?width=120&height=120&fit=bounds" /> River sediment contains natural organic material, largely derived from allochthonous sources, meaning a source from outside the river. This is particularly important when regarding polycyclic aromatic hydrocarbons (PAHs), which can have sources hundreds of kilometers from a sampling point within the river catchment. In fact, every river can contain PAHs from a source other than that which is the focus of a remedial investigation, and consideration of this is very important. Presentation of the detection of PAHs in relation to guidelines is a requirement for regulatory purposes. However, if those PAHs are natural, or at least originate from a source that is unrelated to the investigation, why take responsibility for them? In order to determine the source of PAHs it is important to collect the right kind of samples (fine grained, highly organic sediment), analyse for the right kind of chemical package (include alkylated PAHs), and interpret the results using the right kind of techniques. This presentation will describe the correct, and incorrect use of environmental forensics techniques using example datasets from our work in Canadian oil spill response and US CERCLA investigations. It will focus on how to construct and interpret PAH fingerprints and ratios, and the use of statistics such as PCA. Environmental professionals involved in spill remediation or site monitoring will find this presentation applicable.

Whose PAH is this? - Envirotech 2018 from Chemistry Matters Inc.

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0 Hidden Figures - AGAT 2018 TechTalks /slideshow/hidden-figures-agat-2018-techtalks/88398207 hiddenfiguresslideshare-180220162315
Hidden Figures - Your Site Investigation Data is Telling You Something; presented by Dr. Court Sandau of Chemistry Matters Inc. and Tom Knapik of Plains Midstream Canada. Presented in Calgary (Jan 2018) and Edmonton (Feb 2018). Chemical patterns are everywhere. When a spill occurs, the signature of that spill is distinct and can be characterized in order to monitor the spill accordingly. Even very old releases can be chemically fingerprinted to determine where the impacts on the site exist and to focus the remediation on the appropriate issues instead of monitoring for the sake of monitoring. This is true for metals, salt, and petroleum hydrocarbons alike. Monitoring data can be more than just above or below guidelines. This talk will present a case study where monitoring data from a large site and collected over a decade were statistically re-evaluated to look at chemical patterns and trends to determine what impacts were truly present on site. Both metals and salinity impacts in soil boreholes and groundwater were analyzed using chemical fingerprinting and multivariate statistical analysis to determine natural salinity patterns and metals on the site. Salinity was assessed using both radar plots and principal component analysis to determine that multiple natural salinity profiles existed for the site that were not related to the current day or historical operations. This information was used to develop site specific guidelines that were used to focus remediation strategies for the site going forward and reduce the amount of needless monitoring conducted each year at the site. This will help reduce monitoring costs going forward and allow the appropriate, targeted remediation on chemicals of concern that pose the biggest environmental concern to the site.]]>
Hidden Figures - Your Site Investigation Data is Telling You Something; presented by Dr. Court Sandau of Chemistry Matters Inc. and Tom Knapik of Plains Midstream Canada. Presented in Calgary (Jan 2018) and Edmonton (Feb 2018). Chemical patterns are everywhere. When a spill occurs, the signature of that spill is distinct and can be characterized in order to monitor the spill accordingly. Even very old releases can be chemically fingerprinted to determine where the impacts on the site exist and to focus the remediation on the appropriate issues instead of monitoring for the sake of monitoring. This is true for metals, salt, and petroleum hydrocarbons alike. Monitoring data can be more than just above or below guidelines. This talk will present a case study where monitoring data from a large site and collected over a decade were statistically re-evaluated to look at chemical patterns and trends to determine what impacts were truly present on site. Both metals and salinity impacts in soil boreholes and groundwater were analyzed using chemical fingerprinting and multivariate statistical analysis to determine natural salinity patterns and metals on the site. Salinity was assessed using both radar plots and principal component analysis to determine that multiple natural salinity profiles existed for the site that were not related to the current day or historical operations. This information was used to develop site specific guidelines that were used to focus remediation strategies for the site going forward and reduce the amount of needless monitoring conducted each year at the site. This will help reduce monitoring costs going forward and allow the appropriate, targeted remediation on chemicals of concern that pose the biggest environmental concern to the site.]]> Tue, 20 Feb 2018 16:23:15 GMT /slideshow/hidden-figures-agat-2018-techtalks/88398207 csandau@slideshare.net(csandau) Hidden Figures - AGAT 2018 TechTalks csandau Hidden Figures - Your Site Investigation Data is Telling You Something; presented by Dr. Court Sandau of Chemistry Matters Inc. and Tom Knapik of Plains Midstream Canada. Presented in Calgary (Jan 2018) and Edmonton (Feb 2018). Chemical patterns are everywhere. When a spill occurs, the signature of that spill is distinct and can be characterized in order to monitor the spill accordingly. Even very old releases can be chemically fingerprinted to determine where the impacts on the site exist and to focus the remediation on the appropriate issues instead of monitoring for the sake of monitoring. This is true for metals, salt, and petroleum hydrocarbons alike. Monitoring data can be more than just above or below guidelines. This talk will present a case study where monitoring data from a large site and collected over a decade were statistically re-evaluated to look at chemical patterns and trends to determine what impacts were truly present on site. Both metals and salinity impacts in soil boreholes and groundwater were analyzed using chemical fingerprinting and multivariate statistical analysis to determine natural salinity patterns and metals on the site. Salinity was assessed using both radar plots and principal component analysis to determine that multiple natural salinity profiles existed for the site that were not related to the current day or historical operations. This information was used to develop site specific guidelines that were used to focus remediation strategies for the site going forward and reduce the amount of needless monitoring conducted each year at the site. This will help reduce monitoring costs going forward and allow the appropriate, targeted remediation on chemicals of concern that pose the biggest environmental concern to the site. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/hiddenfiguresslideshare-180220162315-thumbnail.jpg?width=120&height=120&fit=bounds" /> Hidden Figures - Your Site Investigation Data is Telling You Something; presented by Dr. Court Sandau of Chemistry Matters Inc. and Tom Knapik of Plains Midstream Canada. Presented in Calgary (Jan 2018) and Edmonton (Feb 2018). Chemical patterns are everywhere. When a spill occurs, the signature of that spill is distinct and can be characterized in order to monitor the spill accordingly. Even very old releases can be chemically fingerprinted to determine where the impacts on the site exist and to focus the remediation on the appropriate issues instead of monitoring for the sake of monitoring. This is true for metals, salt, and petroleum hydrocarbons alike. Monitoring data can be more than just above or below guidelines. This talk will present a case study where monitoring data from a large site and collected over a decade were statistically re-evaluated to look at chemical patterns and trends to determine what impacts were truly present on site. Both metals and salinity impacts in soil boreholes and groundwater were analyzed using chemical fingerprinting and multivariate statistical analysis to determine natural salinity patterns and metals on the site. Salinity was assessed using both radar plots and principal component analysis to determine that multiple natural salinity profiles existed for the site that were not related to the current day or historical operations. This information was used to develop site specific guidelines that were used to focus remediation strategies for the site going forward and reduce the amount of needless monitoring conducted each year at the site. This will help reduce monitoring costs going forward and allow the appropriate, targeted remediation on chemicals of concern that pose the biggest environmental concern to the site.

Hidden Figures - AGAT 2018 TechTalks from Chemistry Matters Inc.

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0 Multiple Lines of Evidence of PAH Fingerprinting and Source Apportionment of Crude Oil Spills - Dioxin 2017 /slideshow/multiple-lines-of-evidence-of-pah-fingerprinting-and-source-apportionment-of-crude-oil-spills-dioxin-2017/85625117 csandaudioxin2017slideshare-180102204736
Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous in the environment. They are produced naturally through forest fires with some congeners having biogenic origins. They are also produced anthropogenically through all burning or combustion processes.]]>
Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous in the environment. They are produced naturally through forest fires with some congeners having biogenic origins. They are also produced anthropogenically through all burning or combustion processes.]]> Tue, 02 Jan 2018 20:47:36 GMT /slideshow/multiple-lines-of-evidence-of-pah-fingerprinting-and-source-apportionment-of-crude-oil-spills-dioxin-2017/85625117 csandau@slideshare.net(csandau) Multiple Lines of Evidence of PAH Fingerprinting and Source Apportionment of Crude Oil Spills - Dioxin 2017 csandau Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous in the environment. They are produced naturally through forest fires with some congeners having biogenic origins. They are also produced anthropogenically through all burning or combustion processes. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/csandaudioxin2017slideshare-180102204736-thumbnail.jpg?width=120&height=120&fit=bounds" /> Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous in the environment. They are produced naturally through forest fires with some congeners having biogenic origins. They are also produced anthropogenically through all burning or combustion processes.

Multiple Lines of Evidence of PAH Fingerprinting and Source Apportionment of Crude Oil Spills - Dioxin 2017 from Chemistry Matters Inc.

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0 Profiling ignitable liquid residues (ILRs) and potential interfering compounds during arson and arsonous wildfire investigations - 8th Multidimensional Chromatography Workshop 2017 /slideshow/profiling-ignitable-liquid-residues-ilrs-and-potential-interfering-compounds-during-arson-and-arsonous-wildfire-investigations-8th-multidimensional-chromatography-workshop-2017-85295651/85295651 csandauarsonouswildfiressildeshare-171229162400
During the 8th Multidimensional Chromatography Workshop 2017 in Toronto, Ontario, Dr. Court Sandau presented on profiling ignitable liquid residues (ILRs) and potential interfering compounds during arson and arsonous wildfire investigations.]]>
During the 8th Multidimensional Chromatography Workshop 2017 in Toronto, Ontario, Dr. Court Sandau presented on profiling ignitable liquid residues (ILRs) and potential interfering compounds during arson and arsonous wildfire investigations.]]> Fri, 29 Dec 2017 16:24:00 GMT /slideshow/profiling-ignitable-liquid-residues-ilrs-and-potential-interfering-compounds-during-arson-and-arsonous-wildfire-investigations-8th-multidimensional-chromatography-workshop-2017-85295651/85295651 csandau@slideshare.net(csandau) Profiling ignitable liquid residues (ILRs) and potential interfering compounds during arson and arsonous wildfire investigations - 8th Multidimensional Chromatography Workshop 2017 csandau During the 8th Multidimensional Chromatography Workshop 2017 in Toronto, Ontario, Dr. Court Sandau presented on profiling ignitable liquid residues (ILRs) and potential interfering compounds during arson and arsonous wildfire investigations. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/csandauarsonouswildfiressildeshare-171229162400-thumbnail.jpg?width=120&height=120&fit=bounds" /> During the 8th Multidimensional Chromatography Workshop 2017 in Toronto, Ontario, Dr. Court Sandau presented on profiling ignitable liquid residues (ILRs) and potential interfering compounds during arson and arsonous wildfire investigations.

Profiling ignitable liquid residues (ILRs) and potential interfering compounds during arson and arsonous wildfire investigations - 8th Multidimensional Chromatography Workshop 2017 from Chemistry Matters Inc.

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0 245TCP - Perspectives on PCDD/Fs from a Review of Industrial Processes and Historical Analysis, and Fast Forward to Opportunites for the Future - Dioxin 2017 /slideshow/245tcp-perspectives-on-pcddfs-from-a-review-of-industrial-processes-and-historical-analysis-and-fast-forward-to-opportunites-for-the-future-dioxin-2017-85295268/85295268 dioxin2017slideshare-171229161940
Overview of 245-TCP Use, historical use and production, as well as formation. Discussion of fingerprinting and alternate patterns, in addition to the formation of PCDDs and PCDFs, TCDD and TCDF during production of 245-TCP Production, and solutions for impacted sites from 245TCP Products]]>
Overview of 245-TCP Use, historical use and production, as well as formation. Discussion of fingerprinting and alternate patterns, in addition to the formation of PCDDs and PCDFs, TCDD and TCDF during production of 245-TCP Production, and solutions for impacted sites from 245TCP Products]]> Fri, 29 Dec 2017 16:19:40 GMT /slideshow/245tcp-perspectives-on-pcddfs-from-a-review-of-industrial-processes-and-historical-analysis-and-fast-forward-to-opportunites-for-the-future-dioxin-2017-85295268/85295268 csandau@slideshare.net(csandau) 245TCP - Perspectives on PCDD/Fs from a Review of Industrial Processes and Historical Analysis, and Fast Forward to Opportunites for the Future - Dioxin 2017 csandau Overview of 245-TCP Use, historical use and production, as well as formation. Discussion of fingerprinting and alternate patterns, in addition to the formation of PCDDs and PCDFs, TCDD and TCDF during production of 245-TCP Production, and solutions for impacted sites from 245TCP Products <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/dioxin2017slideshare-171229161940-thumbnail.jpg?width=120&height=120&fit=bounds" /> Overview of 245-TCP Use, historical use and production, as well as formation. Discussion of fingerprinting and alternate patterns, in addition to the formation of PCDDs and PCDFs, TCDD and TCDF during production of 245-TCP Production, and solutions for impacted sites from 245TCP Products

245TCP - Perspectives on PCDD/Fs from a Review of Industrial Processes and Historical Analysis, and Fast Forward to Opportunites for the Future - Dioxin 2017 from Chemistry Matters Inc.

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0 Demystifying the Chain of Custody & Forensic Arson Analysis - IAAI 2017 /csandau/demystifying-the-chain-of-custody-forensic-arson-analysis-iaai-2017 iaai2017publicversion-171229161439
The results for ignitable liquid residue (ILR) analysis depend on early decisions. Sometimes, results depend on decisions made before the investigator even leaves for the arson investigation site. How to Maintain Legal Chain of Custody Legal chain of custody is not only about documentation. You do need to document samples and sampling procedures, but as the custodian of samples, you should also be implementing processes and procedures that prevent cross contamination. During this course, the legal sampling and legal chain of custody process will be discussed along with implications of the sampling process on the analytical results. This will include a discussion on appropriate sampling containers and how it can impact your results. With this course, you will learn how sampling can impact the chemistry of your results and what you can do about it as well as developing a complete understanding of chain of custody for your courtroom defense. ILR Analysis Methods The sampling at the investigation site provides the best opportunity to optimize the detection of ILRs. Several points will be discussed on how to accomplish the best results possible. Once samples are submitted to the laboratory, they are processed to determine if ILRs are present and what type of ILRs are on the samples. There are different methods for analysis of ILRs and these methods will be discussed. ILR chemical analysis requires the determination of compounds present in samples collected from the investigation. These compounds need to be present at certain concentrations (above the laboratory detection limits), in certain ratios (patterns match known ILR patterns), and have enough of the marker compounds to determine the type of ILR used on the investigation. Not all methods and results are equal. Learning the basics of ILR analysis will allow you to ask the hard and appropriate questions about your sample results. It may also help explain apparent false positives from canine detection units. The Importance of Reference Samples The topic of reference samples, sometimes incorrectly referred to as 'control samples' will be discussed. All matrices collected at fire investigations can contain marker compounds used for ILR identification but are not present on those materials because of arson. Reference samples are key samples to any arson investigation and must be collected with purpose for every investigation. The interferences present in reference samples can help ILR analysis determine the compounds that are present in background locations. This provides further insight for the investigation. The use of reference samples is especially important in arsonous wildfire investigations. Since ILR marker compounds can be formed in the combustion process, ILR detection in arsonous wildfire samples can be inconclusive if not considered properly.]]>
The results for ignitable liquid residue (ILR) analysis depend on early decisions. Sometimes, results depend on decisions made before the investigator even leaves for the arson investigation site. How to Maintain Legal Chain of Custody Legal chain of custody is not only about documentation. You do need to document samples and sampling procedures, but as the custodian of samples, you should also be implementing processes and procedures that prevent cross contamination. During this course, the legal sampling and legal chain of custody process will be discussed along with implications of the sampling process on the analytical results. This will include a discussion on appropriate sampling containers and how it can impact your results. With this course, you will learn how sampling can impact the chemistry of your results and what you can do about it as well as developing a complete understanding of chain of custody for your courtroom defense. ILR Analysis Methods The sampling at the investigation site provides the best opportunity to optimize the detection of ILRs. Several points will be discussed on how to accomplish the best results possible. Once samples are submitted to the laboratory, they are processed to determine if ILRs are present and what type of ILRs are on the samples. There are different methods for analysis of ILRs and these methods will be discussed. ILR chemical analysis requires the determination of compounds present in samples collected from the investigation. These compounds need to be present at certain concentrations (above the laboratory detection limits), in certain ratios (patterns match known ILR patterns), and have enough of the marker compounds to determine the type of ILR used on the investigation. Not all methods and results are equal. Learning the basics of ILR analysis will allow you to ask the hard and appropriate questions about your sample results. It may also help explain apparent false positives from canine detection units. The Importance of Reference Samples The topic of reference samples, sometimes incorrectly referred to as 'control samples' will be discussed. All matrices collected at fire investigations can contain marker compounds used for ILR identification but are not present on those materials because of arson. Reference samples are key samples to any arson investigation and must be collected with purpose for every investigation. The interferences present in reference samples can help ILR analysis determine the compounds that are present in background locations. This provides further insight for the investigation. The use of reference samples is especially important in arsonous wildfire investigations. Since ILR marker compounds can be formed in the combustion process, ILR detection in arsonous wildfire samples can be inconclusive if not considered properly.]]> Fri, 29 Dec 2017 16:14:38 GMT /csandau/demystifying-the-chain-of-custody-forensic-arson-analysis-iaai-2017 csandau@slideshare.net(csandau) Demystifying the Chain of Custody & Forensic Arson Analysis - IAAI 2017 csandau The results for ignitable liquid residue (ILR) analysis depend on early decisions. Sometimes, results depend on decisions made before the investigator even leaves for the arson investigation site. How to Maintain Legal Chain of Custody Legal chain of custody is not only about documentation. You do need to document samples and sampling procedures, but as the custodian of samples, you should also be implementing processes and procedures that prevent cross contamination. During this course, the legal sampling and legal chain of custody process will be discussed along with implications of the sampling process on the analytical results. This will include a discussion on appropriate sampling containers and how it can impact your results. With this course, you will learn how sampling can impact the chemistry of your results and what you can do about it as well as developing a complete understanding of chain of custody for your courtroom defense. ILR Analysis Methods The sampling at the investigation site provides the best opportunity to optimize the detection of ILRs. Several points will be discussed on how to accomplish the best results possible. Once samples are submitted to the laboratory, they are processed to determine if ILRs are present and what type of ILRs are on the samples. There are different methods for analysis of ILRs and these methods will be discussed. ILR chemical analysis requires the determination of compounds present in samples collected from the investigation. These compounds need to be present at certain concentrations (above the laboratory detection limits), in certain ratios (patterns match known ILR patterns), and have enough of the marker compounds to determine the type of ILR used on the investigation. Not all methods and results are equal. Learning the basics of ILR analysis will allow you to ask the hard and appropriate questions about your sample results. It may also help explain apparent false positives from canine detection units. The Importance of Reference Samples The topic of reference samples, sometimes incorrectly referred to as 'control samples' will be discussed. All matrices collected at fire investigations can contain marker compounds used for ILR identification but are not present on those materials because of arson. Reference samples are key samples to any arson investigation and must be collected with purpose for every investigation. The interferences present in reference samples can help ILR analysis determine the compounds that are present in background locations. This provides further insight for the investigation. The use of reference samples is especially important in arsonous wildfire investigations. Since ILR marker compounds can be formed in the combustion process, ILR detection in arsonous wildfire samples can be inconclusive if not considered properly. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/iaai2017publicversion-171229161439-thumbnail.jpg?width=120&height=120&fit=bounds" /> The results for ignitable liquid residue (ILR) analysis depend on early decisions. Sometimes, results depend on decisions made before the investigator even leaves for the arson investigation site. How to Maintain Legal Chain of Custody Legal chain of custody is not only about documentation. You do need to document samples and sampling procedures, but as the custodian of samples, you should also be implementing processes and procedures that prevent cross contamination. During this course, the legal sampling and legal chain of custody process will be discussed along with implications of the sampling process on the analytical results. This will include a discussion on appropriate sampling containers and how it can impact your results. With this course, you will learn how sampling can impact the chemistry of your results and what you can do about it as well as developing a complete understanding of chain of custody for your courtroom defense. ILR Analysis Methods The sampling at the investigation site provides the best opportunity to optimize the detection of ILRs. Several points will be discussed on how to accomplish the best results possible. Once samples are submitted to the laboratory, they are processed to determine if ILRs are present and what type of ILRs are on the samples. There are different methods for analysis of ILRs and these methods will be discussed. ILR chemical analysis requires the determination of compounds present in samples collected from the investigation. These compounds need to be present at certain concentrations (above the laboratory detection limits), in certain ratios (patterns match known ILR patterns), and have enough of the marker compounds to determine the type of ILR used on the investigation. Not all methods and results are equal. Learning the basics of ILR analysis will allow you to ask the hard and appropriate questions about your sample results. It may also help explain apparent false positives from canine detection units. The Importance of Reference Samples The topic of reference samples, sometimes incorrectly referred to as 'control samples' will be discussed. All matrices collected at fire investigations can contain marker compounds used for ILR identification but are not present on those materials because of arson. Reference samples are key samples to any arson investigation and must be collected with purpose for every investigation. The interferences present in reference samples can help ILR analysis determine the compounds that are present in background locations. This provides further insight for the investigation. The use of reference samples is especially important in arsonous wildfire investigations. Since ILR marker compounds can be formed in the combustion process, ILR detection in arsonous wildfire samples can be inconclusive if not considered properly.

Demystifying the Chain of Custody & Forensic Arson Analysis - IAAI 2017 from Chemistry Matters Inc.

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0 Using Fingerprinting Techniques and Multivariate Statistics to Identify Natural Salinity versus Anthropogenic Salinity in Soil - CLRA 2017 /slideshow/using-fingerprinting-techniques-and-multivariate-statistics-to-identify-natural-salinity-versus-anthropogenic-salinity-in-soil-clra-2017/85294140 clraslidshare-171229160711
The ability to recognize natural salinity in soil versus anthropogenic salinity is the key to prevent unnecessary remediation. Using salinity fingerprinting techniques along with the use of multivariate statistics, it is possible to identify natural saline conditions from those caused by anthropogenic sources. Naturally elevated salinity ions in soil may be found in concentrations high enough to elevate salinity related parameters (i.e. electrical conductivity (EC) and sodium adsorption ratio (SAR)) above applicable guidelines. Using basic chemistry, visual representations of the salinity fingerprint in the soil can be made by simple radar plots of the cations and anions in the soil samples. For sites that are simple (i.e, sites with well defined background fingerprints and a well defined, singular source on site) this can be an effective tool at demonstrating natural and anthropogenic saline impacts on a site. For more complex sites, the use of multivariate statistical approaches such as principal component analysis (PCA) and hierarchical cluster analysis (HCA) can be coupled with the radar plots to provide a higher degree of understanding of the site. PCA and HCA use different approaches to group samples that are similar in origin. These groups, when used with the radar plots, can provide information of samples that are from the same source and potentially identity multiple sources and multiple types of natural saline conditions. Additionally, when different salinity fingerprints are found on site as a result of multiple background signals, soil from different depth profiles or multiple salinity impact sources, PCA and HCA, combined with radar plots, can help determine what samples are impacted by anthropogenic saline impacts and which are natural. Case studies will be presented to help demonstrate the process of dealing with potential natural saline sites. ]]>
The ability to recognize natural salinity in soil versus anthropogenic salinity is the key to prevent unnecessary remediation. Using salinity fingerprinting techniques along with the use of multivariate statistics, it is possible to identify natural saline conditions from those caused by anthropogenic sources. Naturally elevated salinity ions in soil may be found in concentrations high enough to elevate salinity related parameters (i.e. electrical conductivity (EC) and sodium adsorption ratio (SAR)) above applicable guidelines. Using basic chemistry, visual representations of the salinity fingerprint in the soil can be made by simple radar plots of the cations and anions in the soil samples. For sites that are simple (i.e, sites with well defined background fingerprints and a well defined, singular source on site) this can be an effective tool at demonstrating natural and anthropogenic saline impacts on a site. For more complex sites, the use of multivariate statistical approaches such as principal component analysis (PCA) and hierarchical cluster analysis (HCA) can be coupled with the radar plots to provide a higher degree of understanding of the site. PCA and HCA use different approaches to group samples that are similar in origin. These groups, when used with the radar plots, can provide information of samples that are from the same source and potentially identity multiple sources and multiple types of natural saline conditions. Additionally, when different salinity fingerprints are found on site as a result of multiple background signals, soil from different depth profiles or multiple salinity impact sources, PCA and HCA, combined with radar plots, can help determine what samples are impacted by anthropogenic saline impacts and which are natural. Case studies will be presented to help demonstrate the process of dealing with potential natural saline sites. ]]> Fri, 29 Dec 2017 16:07:11 GMT /slideshow/using-fingerprinting-techniques-and-multivariate-statistics-to-identify-natural-salinity-versus-anthropogenic-salinity-in-soil-clra-2017/85294140 csandau@slideshare.net(csandau) Using Fingerprinting Techniques and Multivariate Statistics to Identify Natural Salinity versus Anthropogenic Salinity in Soil - CLRA 2017 csandau The ability to recognize natural salinity in soil versus anthropogenic salinity is the key to prevent unnecessary remediation. Using salinity fingerprinting techniques along with the use of multivariate statistics, it is possible to identify natural saline conditions from those caused by anthropogenic sources. Naturally elevated salinity ions in soil may be found in concentrations high enough to elevate salinity related parameters (i.e. electrical conductivity (EC) and sodium adsorption ratio (SAR)) above applicable guidelines. Using basic chemistry, visual representations of the salinity fingerprint in the soil can be made by simple radar plots of the cations and anions in the soil samples. For sites that are simple (i.e, sites with well defined background fingerprints and a well defined, singular source on site) this can be an effective tool at demonstrating natural and anthropogenic saline impacts on a site. For more complex sites, the use of multivariate statistical approaches such as principal component analysis (PCA) and hierarchical cluster analysis (HCA) can be coupled with the radar plots to provide a higher degree of understanding of the site. PCA and HCA use different approaches to group samples that are similar in origin. These groups, when used with the radar plots, can provide information of samples that are from the same source and potentially identity multiple sources and multiple types of natural saline conditions. Additionally, when different salinity fingerprints are found on site as a result of multiple background signals, soil from different depth profiles or multiple salinity impact sources, PCA and HCA, combined with radar plots, can help determine what samples are impacted by anthropogenic saline impacts and which are natural. Case studies will be presented to help demonstrate the process of dealing with potential natural saline sites. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/clraslidshare-171229160711-thumbnail.jpg?width=120&height=120&fit=bounds" /> The ability to recognize natural salinity in soil versus anthropogenic salinity is the key to prevent unnecessary remediation. Using salinity fingerprinting techniques along with the use of multivariate statistics, it is possible to identify natural saline conditions from those caused by anthropogenic sources. Naturally elevated salinity ions in soil may be found in concentrations high enough to elevate salinity related parameters (i.e. electrical conductivity (EC) and sodium adsorption ratio (SAR)) above applicable guidelines. Using basic chemistry, visual representations of the salinity fingerprint in the soil can be made by simple radar plots of the cations and anions in the soil samples. For sites that are simple (i.e, sites with well defined background fingerprints and a well defined, singular source on site) this can be an effective tool at demonstrating natural and anthropogenic saline impacts on a site. For more complex sites, the use of multivariate statistical approaches such as principal component analysis (PCA) and hierarchical cluster analysis (HCA) can be coupled with the radar plots to provide a higher degree of understanding of the site. PCA and HCA use different approaches to group samples that are similar in origin. These groups, when used with the radar plots, can provide information of samples that are from the same source and potentially identity multiple sources and multiple types of natural saline conditions. Additionally, when different salinity fingerprints are found on site as a result of multiple background signals, soil from different depth profiles or multiple salinity impact sources, PCA and HCA, combined with radar plots, can help determine what samples are impacted by anthropogenic saline impacts and which are natural. Case studies will be presented to help demonstrate the process of dealing with potential natural saline sites.

Using Fingerprinting Techniques and Multivariate Statistics to Identify Natural Salinity versus Anthropogenic Salinity in Soil - CLRA 2017 from Chemistry Matters Inc.

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0 Arson: The Science of Fire and Chemical Fingerprints Left Behind - MRU 2017 /slideshow/arson-the-science-of-fire-and-chemical-fingerprints-left-behind-mru-2017-85293588/85293588 mrutalk2017slideshare-171229160047
Wildﬁre frequency, severity and damages are increasing as climate change causes earlier snow melts and overall drier conditions. Forest ﬁre can be caused by natural through lightning strikes, but the majority of wildﬁres are caused by humans. Of the 1200 wildﬁres reported in Alberta each year, over half are human caused. It is the job of a ﬁre investigator to gather evidence at wildﬁres to determine the origin and causes of the wildﬁre. Roles of the investigator may include ﬁre scene examination through to delivering court room evidence. Fire investigations require the highest quality in sampling, legal chain of custody & sample handling, and testing & interpretation of ignitable liquid residues (ILRs). This role can be ideally ﬁlled by a chemist/scientist who has an in depth understanding of how all facets of a ﬁeld program and how the analysis of samples can impact the interpretation and results. Ultimately, prosecution will depend on reliable ILR results and relaying these results to the ﬁre investigators. Dr. Sandau, and his team at Chemistry Matters, are one of Canada’s leading resources for wildﬁre arson investigation and have led investigations for some of the largest wildﬁres in North America. This presentation will explore the chemistry behind wildﬁre investigations. The chemistry starts from the ﬁeld work and sampling with the use of canine detection units. It is then carried forward to the instrumentation used for laboratory analysis which is used for the interpretation and ending in testifying in a courtroom setting. This presentation will examine the evolution of our detection systems that allow us to measure molecules at the lowest levels and use their patterns to chemically ﬁngerprint the ignitable liquid residues and other products used which provides valuable cutting edge evidence for potential convictions. ]]>
Wildﬁre frequency, severity and damages are increasing as climate change causes earlier snow melts and overall drier conditions. Forest ﬁre can be caused by natural through lightning strikes, but the majority of wildﬁres are caused by humans. Of the 1200 wildﬁres reported in Alberta each year, over half are human caused. It is the job of a ﬁre investigator to gather evidence at wildﬁres to determine the origin and causes of the wildﬁre. Roles of the investigator may include ﬁre scene examination through to delivering court room evidence. Fire investigations require the highest quality in sampling, legal chain of custody & sample handling, and testing & interpretation of ignitable liquid residues (ILRs). This role can be ideally ﬁlled by a chemist/scientist who has an in depth understanding of how all facets of a ﬁeld program and how the analysis of samples can impact the interpretation and results. Ultimately, prosecution will depend on reliable ILR results and relaying these results to the ﬁre investigators. Dr. Sandau, and his team at Chemistry Matters, are one of Canada’s leading resources for wildﬁre arson investigation and have led investigations for some of the largest wildﬁres in North America. This presentation will explore the chemistry behind wildﬁre investigations. The chemistry starts from the ﬁeld work and sampling with the use of canine detection units. It is then carried forward to the instrumentation used for laboratory analysis which is used for the interpretation and ending in testifying in a courtroom setting. This presentation will examine the evolution of our detection systems that allow us to measure molecules at the lowest levels and use their patterns to chemically ﬁngerprint the ignitable liquid residues and other products used which provides valuable cutting edge evidence for potential convictions. ]]> Fri, 29 Dec 2017 16:00:47 GMT /slideshow/arson-the-science-of-fire-and-chemical-fingerprints-left-behind-mru-2017-85293588/85293588 csandau@slideshare.net(csandau) Arson: The Science of Fire and Chemical Fingerprints Left Behind - MRU 2017 csandau Wildﬁre frequency, severity and damages are increasing as climate change causes earlier snow melts and overall drier conditions. Forest ﬁre can be caused by natural through lightning strikes, but the majority of wildﬁres are caused by humans. Of the 1200 wildﬁres reported in Alberta each year, over half are human caused. It is the job of a ﬁre investigator to gather evidence at wildﬁres to determine the origin and causes of the wildﬁre. Roles of the investigator may include ﬁre scene examination through to delivering court room evidence. Fire investigations require the highest quality in sampling, legal chain of custody & sample handling, and testing & interpretation of ignitable liquid residues (ILRs). This role can be ideally ﬁlled by a chemist/scientist who has an in depth understanding of how all facets of a ﬁeld program and how the analysis of samples can impact the interpretation and results. Ultimately, prosecution will depend on reliable ILR results and relaying these results to the ﬁre investigators. Dr. Sandau, and his team at Chemistry Matters, are one of Canada’s leading resources for wildﬁre arson investigation and have led investigations for some of the largest wildﬁres in North America. This presentation will explore the chemistry behind wildﬁre investigations. The chemistry starts from the ﬁeld work and sampling with the use of canine detection units. It is then carried forward to the instrumentation used for laboratory analysis which is used for the interpretation and ending in testifying in a courtroom setting. This presentation will examine the evolution of our detection systems that allow us to measure molecules at the lowest levels and use their patterns to chemically ﬁngerprint the ignitable liquid residues and other products used which provides valuable cutting edge evidence for potential convictions. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/mrutalk2017slideshare-171229160047-thumbnail.jpg?width=120&height=120&fit=bounds" /> Wildﬁre frequency, severity and damages are increasing as climate change causes earlier snow melts and overall drier conditions. Forest ﬁre can be caused by natural through lightning strikes, but the majority of wildﬁres are caused by humans. Of the 1200 wildﬁres reported in Alberta each year, over half are human caused. It is the job of a ﬁre investigator to gather evidence at wildﬁres to determine the origin and causes of the wildﬁre. Roles of the investigator may include ﬁre scene examination through to delivering court room evidence. Fire investigations require the highest quality in sampling, legal chain of custody & sample handling, and testing & interpretation of ignitable liquid residues (ILRs). This role can be ideally ﬁlled by a chemist/scientist who has an in depth understanding of how all facets of a ﬁeld program and how the analysis of samples can impact the interpretation and results. Ultimately, prosecution will depend on reliable ILR results and relaying these results to the ﬁre investigators. Dr. Sandau, and his team at Chemistry Matters, are one of Canada’s leading resources for wildﬁre arson investigation and have led investigations for some of the largest wildﬁres in North America. This presentation will explore the chemistry behind wildﬁre investigations. The chemistry starts from the ﬁeld work and sampling with the use of canine detection units. It is then carried forward to the instrumentation used for laboratory analysis which is used for the interpretation and ending in testifying in a courtroom setting. This presentation will examine the evolution of our detection systems that allow us to measure molecules at the lowest levels and use their patterns to chemically ﬁngerprint the ignitable liquid residues and other products used which provides valuable cutting edge evidence for potential convictions.

Arson: The Science of Fire and Chemical Fingerprints Left Behind - MRU 2017 from Chemistry Matters Inc.

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0 Where Does Toluene Come From? - Petrogenic families and biogenic loners, AGAT 2017 /slideshow/where-does-toluene-come-from-petrogenic-families-and-biogenic-loners-agat-2017/80906797 wheredoestoluenecomefromagat2017-171017165308
Specific ecological niches support the accumulation of biologically formed toluene, and the concentrations can easily be found in excess of remedial guidelines. The presence of biogenic toluene in environmental samples can confound remedial investigations of petroleum impacts. However,the determination of the origin of toluene that is acceptable by regulatory bodies requires a scientifically creditable demonstration using a forensic analytical approach, and forensic data interpretation. This presentation demonstrates the application of established arson analysis methodology and forensic data interpretation methods that can distinguish the origin of toluene as either biogenic or petrogenic. Arson analysis methods are conducted for crime scene investigators to provide legal proof for the presence of petroleum distillates,if present, in relation to arson investigations. This same method can be applied in the environmental field for the defensible determination of the origin of toluene. Chemistry Matters Inc.and the AGAT Forensic Laboratory provide analysis for arson investigations for the Government of Alberta and have applied this methodology successfully for the demonstration of biogenic toluene at a number of wetland investigation sites. Example data from wetland environments and a range of petrogenic types are presented to explain the operation of the method. Environmental professionals involved in spill remediation or site monitoring should find this presentation applicable.]]>
Specific ecological niches support the accumulation of biologically formed toluene, and the concentrations can easily be found in excess of remedial guidelines. The presence of biogenic toluene in environmental samples can confound remedial investigations of petroleum impacts. However,the determination of the origin of toluene that is acceptable by regulatory bodies requires a scientifically creditable demonstration using a forensic analytical approach, and forensic data interpretation. This presentation demonstrates the application of established arson analysis methodology and forensic data interpretation methods that can distinguish the origin of toluene as either biogenic or petrogenic. Arson analysis methods are conducted for crime scene investigators to provide legal proof for the presence of petroleum distillates,if present, in relation to arson investigations. This same method can be applied in the environmental field for the defensible determination of the origin of toluene. Chemistry Matters Inc.and the AGAT Forensic Laboratory provide analysis for arson investigations for the Government of Alberta and have applied this methodology successfully for the demonstration of biogenic toluene at a number of wetland investigation sites. Example data from wetland environments and a range of petrogenic types are presented to explain the operation of the method. Environmental professionals involved in spill remediation or site monitoring should find this presentation applicable.]]> Tue, 17 Oct 2017 16:53:08 GMT /slideshow/where-does-toluene-come-from-petrogenic-families-and-biogenic-loners-agat-2017/80906797 csandau@slideshare.net(csandau) Where Does Toluene Come From? - Petrogenic families and biogenic loners, AGAT 2017 csandau Specific ecological niches support the accumulation of biologically formed toluene, and the concentrations can easily be found in excess of remedial guidelines. The presence of biogenic toluene in environmental samples can confound remedial investigations of petroleum impacts. However,the determination of the origin of toluene that is acceptable by regulatory bodies requires a scientifically creditable demonstration using a forensic analytical approach, and forensic data interpretation. This presentation demonstrates the application of established arson analysis methodology and forensic data interpretation methods that can distinguish the origin of toluene as either biogenic or petrogenic. Arson analysis methods are conducted for crime scene investigators to provide legal proof for the presence of petroleum distillates,if present, in relation to arson investigations. This same method can be applied in the environmental field for the defensible determination of the origin of toluene. Chemistry Matters Inc.and the AGAT Forensic Laboratory provide analysis for arson investigations for the Government of Alberta and have applied this methodology successfully for the demonstration of biogenic toluene at a number of wetland investigation sites. Example data from wetland environments and a range of petrogenic types are presented to explain the operation of the method. Environmental professionals involved in spill remediation or site monitoring should find this presentation applicable. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/wheredoestoluenecomefromagat2017-171017165308-thumbnail.jpg?width=120&height=120&fit=bounds" /> Specific ecological niches support the accumulation of biologically formed toluene, and the concentrations can easily be found in excess of remedial guidelines. The presence of biogenic toluene in environmental samples can confound remedial investigations of petroleum impacts. However,the determination of the origin of toluene that is acceptable by regulatory bodies requires a scientifically creditable demonstration using a forensic analytical approach, and forensic data interpretation. This presentation demonstrates the application of established arson analysis methodology and forensic data interpretation methods that can distinguish the origin of toluene as either biogenic or petrogenic. Arson analysis methods are conducted for crime scene investigators to provide legal proof for the presence of petroleum distillates,if present, in relation to arson investigations. This same method can be applied in the environmental field for the defensible determination of the origin of toluene. Chemistry Matters Inc.and the AGAT Forensic Laboratory provide analysis for arson investigations for the Government of Alberta and have applied this methodology successfully for the demonstration of biogenic toluene at a number of wetland investigation sites. Example data from wetland environments and a range of petrogenic types are presented to explain the operation of the method. Environmental professionals involved in spill remediation or site monitoring should find this presentation applicable.

Where Does Toluene Come From? - Petrogenic families and biogenic loners, AGAT 2017 from Chemistry Matters Inc.

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0 Where Does Toluene Come From? - Petrogenic Families and Biogenic Loners, Watertech, 2017 /slideshow/where-does-toluene-come-from-petrogenic-families-and-biogenic-loners-watertech-2017/80906298 wheredoestoluenecomefromwatertech2017-171017163916
The seasonal accumulation of toluene by microbiological processes within specific wetland environments is a locally-recognized, but little understood, process. It has not been documented within the peer-reviewed literature. Currently, there is no legally defensible method of distinguishing the origin of toluene in environmental samples. The presence of biogenic toluene can confound environmental investigations relating to petroleum releases within wetland environments, which comprise a large area of northern Alberta as well as other provinces. This presentation discusses the results from the application of an established ASTM method, which is already accepted for arson analysis, for the investigation of the origin of toluene in wetland peat samples. The analytical method and environmental forensic data interpretation are capable of readily distinguishing biogenic and petrogenic origins of toluene in a legally-defensible manner. This is conducted by using plant biomarker chemistry to identify natural toluene sources, monocyclic aromatic hydrocarbon fingerprints and diagnostic ratios, which are possible due to substantially improved detection limits compared with conventional BTEX analysis. Environmental professionals involved in spill remediation or site monitoring will find this presentation applicable.]]>
The seasonal accumulation of toluene by microbiological processes within specific wetland environments is a locally-recognized, but little understood, process. It has not been documented within the peer-reviewed literature. Currently, there is no legally defensible method of distinguishing the origin of toluene in environmental samples. The presence of biogenic toluene can confound environmental investigations relating to petroleum releases within wetland environments, which comprise a large area of northern Alberta as well as other provinces. This presentation discusses the results from the application of an established ASTM method, which is already accepted for arson analysis, for the investigation of the origin of toluene in wetland peat samples. The analytical method and environmental forensic data interpretation are capable of readily distinguishing biogenic and petrogenic origins of toluene in a legally-defensible manner. This is conducted by using plant biomarker chemistry to identify natural toluene sources, monocyclic aromatic hydrocarbon fingerprints and diagnostic ratios, which are possible due to substantially improved detection limits compared with conventional BTEX analysis. Environmental professionals involved in spill remediation or site monitoring will find this presentation applicable.]]> Tue, 17 Oct 2017 16:39:16 GMT /slideshow/where-does-toluene-come-from-petrogenic-families-and-biogenic-loners-watertech-2017/80906298 csandau@slideshare.net(csandau) Where Does Toluene Come From? - Petrogenic Families and Biogenic Loners, Watertech, 2017 csandau The seasonal accumulation of toluene by microbiological processes within specific wetland environments is a locally-recognized, but little understood, process. It has not been documented within the peer-reviewed literature. Currently, there is no legally defensible method of distinguishing the origin of toluene in environmental samples. The presence of biogenic toluene can confound environmental investigations relating to petroleum releases within wetland environments, which comprise a large area of northern Alberta as well as other provinces. This presentation discusses the results from the application of an established ASTM method, which is already accepted for arson analysis, for the investigation of the origin of toluene in wetland peat samples. The analytical method and environmental forensic data interpretation are capable of readily distinguishing biogenic and petrogenic origins of toluene in a legally-defensible manner. This is conducted by using plant biomarker chemistry to identify natural toluene sources, monocyclic aromatic hydrocarbon fingerprints and diagnostic ratios, which are possible due to substantially improved detection limits compared with conventional BTEX analysis. Environmental professionals involved in spill remediation or site monitoring will find this presentation applicable. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/wheredoestoluenecomefromwatertech2017-171017163916-thumbnail.jpg?width=120&height=120&fit=bounds" /> The seasonal accumulation of toluene by microbiological processes within specific wetland environments is a locally-recognized, but little understood, process. It has not been documented within the peer-reviewed literature. Currently, there is no legally defensible method of distinguishing the origin of toluene in environmental samples. The presence of biogenic toluene can confound environmental investigations relating to petroleum releases within wetland environments, which comprise a large area of northern Alberta as well as other provinces. This presentation discusses the results from the application of an established ASTM method, which is already accepted for arson analysis, for the investigation of the origin of toluene in wetland peat samples. The analytical method and environmental forensic data interpretation are capable of readily distinguishing biogenic and petrogenic origins of toluene in a legally-defensible manner. This is conducted by using plant biomarker chemistry to identify natural toluene sources, monocyclic aromatic hydrocarbon fingerprints and diagnostic ratios, which are possible due to substantially improved detection limits compared with conventional BTEX analysis. Environmental professionals involved in spill remediation or site monitoring will find this presentation applicable.

Where Does Toluene Come From? - Petrogenic Families and Biogenic Loners, Watertech, 2017 from Chemistry Matters Inc.

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0 Chemistry Matters Dioxin2016 Analytical Summary /csandau/chemistry-matters-dioxin2016-analytical-summary chemistrymattersdioxin2016analyticalsummary-160902175740
Final day of the Dioxin 2016 conference in Florence, Italy, Dr. Court Sandau presented a summary of the analytical talks and posters presented at the Dioxin conference this year. Discussed the biggest highlights on PFAs, PBDEs, the history of Dioxin analysis and his impressions of where biomonitoring is going.]]>
Final day of the Dioxin 2016 conference in Florence, Italy, Dr. Court Sandau presented a summary of the analytical talks and posters presented at the Dioxin conference this year. Discussed the biggest highlights on PFAs, PBDEs, the history of Dioxin analysis and his impressions of where biomonitoring is going.]]> Fri, 02 Sep 2016 17:57:40 GMT /csandau/chemistry-matters-dioxin2016-analytical-summary csandau@slideshare.net(csandau) Chemistry Matters Dioxin2016 Analytical Summary csandau Final day of the Dioxin 2016 conference in Florence, Italy, Dr. Court Sandau presented a summary of the analytical talks and posters presented at the Dioxin conference this year. Discussed the biggest highlights on PFAs, PBDEs, the history of Dioxin analysis and his impressions of where biomonitoring is going. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/chemistrymattersdioxin2016analyticalsummary-160902175740-thumbnail.jpg?width=120&height=120&fit=bounds" /> Final day of the Dioxin 2016 conference in Florence, Italy, Dr. Court Sandau presented a summary of the analytical talks and posters presented at the Dioxin conference this year. Discussed the biggest highlights on PFAs, PBDEs, the history of Dioxin analysis and his impressions of where biomonitoring is going.

Chemistry Matters Dioxin2016 Analytical Summary from Chemistry Matters Inc.

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0 Future of environmental_forensics_inef2016 /slideshow/future-of-environmentalforensicsinef2016/63799310 futureofenvironmentalforensicsinef2016-160707035735
Closing plenary talk given at the International Network of Environmental Forensics (INEF) 2016 conference held in Orebro, Sweden. Presentation covered the history of PCBs and dioxins and their roles in the birth of environmental forensics. The talk discussed a new definition of the term “Environmental Forensics” and provided five main points regarding environmental forensics investigations.]]>
Closing plenary talk given at the International Network of Environmental Forensics (INEF) 2016 conference held in Orebro, Sweden. Presentation covered the history of PCBs and dioxins and their roles in the birth of environmental forensics. The talk discussed a new definition of the term “Environmental Forensics” and provided five main points regarding environmental forensics investigations.]]> Thu, 07 Jul 2016 03:57:35 GMT /slideshow/future-of-environmentalforensicsinef2016/63799310 csandau@slideshare.net(csandau) Future of environmental_forensics_inef2016 csandau Closing plenary talk given at the International Network of Environmental Forensics (INEF) 2016 conference held in Orebro, Sweden. Presentation covered the history of PCBs and dioxins and their roles in the birth of environmental forensics. The talk discussed a new definition of the term “Environmental Forensics” and provided five main points regarding environmental forensics investigations. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/futureofenvironmentalforensicsinef2016-160707035735-thumbnail.jpg?width=120&height=120&fit=bounds" /> Closing plenary talk given at the International Network of Environmental Forensics (INEF) 2016 conference held in Orebro, Sweden. Presentation covered the history of PCBs and dioxins and their roles in the birth of environmental forensics. The talk discussed a new definition of the term “Environmental Forensics” and provided five main points regarding environmental forensics investigations.

Future of environmental_forensics_inef2016 from Chemistry Matters Inc.

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0 GeoConvention2016_Identifying Surface Casing Vent Flows (SCVF) Using Geoforensics /slideshow/geoconvention2016identifying-surface-casing-vent-flows-scvf-using-geoforensics/59256020 csandaugeoconvention2016-160308125227
Presentation at 2016 GeoConvention in Calgary, Alberta. Presentation covered best practices for the collection of samples then using advanced geochemistry and geoforensics to identify source zones of SCVFs.]]>
Presentation at 2016 GeoConvention in Calgary, Alberta. Presentation covered best practices for the collection of samples then using advanced geochemistry and geoforensics to identify source zones of SCVFs.]]> Tue, 08 Mar 2016 12:52:27 GMT /slideshow/geoconvention2016identifying-surface-casing-vent-flows-scvf-using-geoforensics/59256020 csandau@slideshare.net(csandau) GeoConvention2016_Identifying Surface Casing Vent Flows (SCVF) Using Geoforensics csandau Presentation at 2016 GeoConvention in Calgary, Alberta. Presentation covered best practices for the collection of samples then using advanced geochemistry and geoforensics to identify source zones of SCVFs. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/csandaugeoconvention2016-160308125227-thumbnail.jpg?width=120&height=120&fit=bounds" /> Presentation at 2016 GeoConvention in Calgary, Alberta. Presentation covered best practices for the collection of samples then using advanced geochemistry and geoforensics to identify source zones of SCVFs.

GeoConvention2016_Identifying Surface Casing Vent Flows (SCVF) Using Geoforensics from Chemistry Matters Inc.

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0 Enviromental Forensics Petroleum Releases 2016 /slideshow/enviromental-forensics-petroleum-releases-2016/57636166 enviromentalforensicspetroleumreleases2016-160129071703
Presentation provides overview of different case studies that used environmental forensics to investigate sources of petroleum releases. Case studies include biomarker analysis to aid in identifying phytogenic and petrogenic hydrocarbons, volatile organic compounds for emission source apportionment and polycyclic aromatic hydrocarbons (PAHs) in sediments.]]>
Presentation provides overview of different case studies that used environmental forensics to investigate sources of petroleum releases. Case studies include biomarker analysis to aid in identifying phytogenic and petrogenic hydrocarbons, volatile organic compounds for emission source apportionment and polycyclic aromatic hydrocarbons (PAHs) in sediments.]]> Fri, 29 Jan 2016 07:17:03 GMT /slideshow/enviromental-forensics-petroleum-releases-2016/57636166 csandau@slideshare.net(csandau) Enviromental Forensics Petroleum Releases 2016 csandau Presentation provides overview of different case studies that used environmental forensics to investigate sources of petroleum releases. Case studies include biomarker analysis to aid in identifying phytogenic and petrogenic hydrocarbons, volatile organic compounds for emission source apportionment and polycyclic aromatic hydrocarbons (PAHs) in sediments. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/enviromentalforensicspetroleumreleases2016-160129071703-thumbnail.jpg?width=120&height=120&fit=bounds" /> Presentation provides overview of different case studies that used environmental forensics to investigate sources of petroleum releases. Case studies include biomarker analysis to aid in identifying phytogenic and petrogenic hydrocarbons, volatile organic compounds for emission source apportionment and polycyclic aromatic hydrocarbons (PAHs) in sediments.

Enviromental Forensics Petroleum Releases 2016 from Chemistry Matters Inc.

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0 CSandau_CV_Nov2015 /slideshow/csandaucvnov2015-56281403/56281403 033c9b9c-38b7-443d-8587-7d7f668201cd-151218165212
]]>
]]> Fri, 18 Dec 2015 16:52:12 GMT /slideshow/csandaucvnov2015-56281403/56281403 csandau@slideshare.net(csandau) CSandau_CV_Nov2015 csandau <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/033c9b9c-38b7-443d-8587-7d7f668201cd-151218165212-thumbnail.jpg?width=120&height=120&fit=bounds" />

CSandau_CV_Nov2015 from Chemistry Matters Inc.

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0 AIA_NOV2015_ Arson and petroleum forensics /slideshow/aianov2015-arson-and-petroleum-forensics/55214887 aianov2015-arsonandpetroleumforensics-151117164035-lva1-app6892
Introduction to talk to be presented on Nov 17, 2015. The introduction shows the multiple compounds that are present in crude oil and refined products which can be used to determine sources of releases and identify products used in arson cases. Such compounds include polycyclic aromatic hydrocarbons, alkylated benzenes, and petroleum biomarkers.]]>
Introduction to talk to be presented on Nov 17, 2015. The introduction shows the multiple compounds that are present in crude oil and refined products which can be used to determine sources of releases and identify products used in arson cases. Such compounds include polycyclic aromatic hydrocarbons, alkylated benzenes, and petroleum biomarkers.]]> Tue, 17 Nov 2015 16:40:34 GMT /slideshow/aianov2015-arson-and-petroleum-forensics/55214887 csandau@slideshare.net(csandau) AIA_NOV2015_ Arson and petroleum forensics csandau Introduction to talk to be presented on Nov 17, 2015. The introduction shows the multiple compounds that are present in crude oil and refined products which can be used to determine sources of releases and identify products used in arson cases. Such compounds include polycyclic aromatic hydrocarbons, alkylated benzenes, and petroleum biomarkers. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/aianov2015-arsonandpetroleumforensics-151117164035-lva1-app6892-thumbnail.jpg?width=120&height=120&fit=bounds" /> Introduction to talk to be presented on Nov 17, 2015. The introduction shows the multiple compounds that are present in crude oil and refined products which can be used to determine sources of releases and identify products used in arson cases. Such compounds include polycyclic aromatic hydrocarbons, alkylated benzenes, and petroleum biomarkers.

AIA_NOV2015_ Arson and petroleum forensics from Chemistry Matters Inc.

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0 FIAA Training - Forensic Arson Analysis and Process /csandau/fiaa-training-forensic-arson-analysis-and-process chemmattfiaatrainingseminarsept24-150929034801-lva1-app6891
Training seminar for Fire Investigators Association of Alberta on arson laboratory analysis and process. Presentation goes through the process of collection and analyzing arson samples for the presence of ignitable liquid residues.]]>
Training seminar for Fire Investigators Association of Alberta on arson laboratory analysis and process. Presentation goes through the process of collection and analyzing arson samples for the presence of ignitable liquid residues.]]> Tue, 29 Sep 2015 03:48:01 GMT /csandau/fiaa-training-forensic-arson-analysis-and-process csandau@slideshare.net(csandau) FIAA Training - Forensic Arson Analysis and Process csandau Training seminar for Fire Investigators Association of Alberta on arson laboratory analysis and process. Presentation goes through the process of collection and analyzing arson samples for the presence of ignitable liquid residues. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/chemmattfiaatrainingseminarsept24-150929034801-lva1-app6891-thumbnail.jpg?width=120&height=120&fit=bounds" /> Training seminar for Fire Investigators Association of Alberta on arson laboratory analysis and process. Presentation goes through the process of collection and analyzing arson samples for the presence of ignitable liquid residues.

FIAA Training - Forensic Arson Analysis and Process from Chemistry Matters Inc.

]]> 3719 15 https://cdn.slidesharecdn.com/ss_thumbnails/chemmattfiaatrainingseminarsept24-150929034801-lva1-app6891-thumbnail.jpg?width=120&height=120&fit=bounds presentation Black http://activitystrea.ms/schema/1.0/post

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0 https://cdn.slidesharecdn.com/profile-photo-csandau-48x48.jpg?cb=1579280659 In 2011, I founded Chemistry Matters Inc. to solve complex environmental problems for my clients. My team specializes in environmental forensics, geoforensics, biomonitoring, arson investigations and consultative chemical risk management. My goal is to be a leading edge resource in industries including oil & gas, government, healthcare, environmental, manufacturing, and education industries. We’ve worked with Shell, Black & Decker, BP, Pengrowth, and many others to provide a high-end yet understandable interpretation of data. Ultimately, my goal is to make chemistry data meaningful so my clients can take action. Building upon my experience from the Centers for Disease Control and Preven... www.chemistry-matters.com https://cdn.slidesharecdn.com/ss_thumbnails/chemmattmdcworkshop2020hawaii-200117170514-thumbnail.jpg?width=320&height=320&fit=bounds csandau/use-of-gcxgctofms-in-litigious-mixed-condensate-plumes-environmental-forensics-case-study-multidimensional-chromatography-workshop Use of GCxGC-TOFMS in ... https://cdn.slidesharecdn.com/ss_thumbnails/csandaupittcon2019fnlss-190329181250-thumbnail.jpg?width=320&height=320&fit=bounds slideshow/fixing-false-negatives-using-2dgctofms-to-correctly-identify-ignitable-liquid-residues-ilrs-in-wildfire-investigations-pittcon-2019/138710111 Fixing False Negatives... https://cdn.slidesharecdn.com/ss_thumbnails/csandauenvirotech2018ss-180413140434-thumbnail.jpg?width=320&height=320&fit=bounds slideshow/unscrambling-contaminant-mixtures-to-determine-their-chemical-fingerprints/93798182 Unscrambling Contamina...