Unlike the data collected by automated gas chromatographic systems used for process control, the VOC data collected by AutoGC systems used at Photochemical Assessment Monitoring Sites (PAMS) is collected for use in ambient air modeling. Data collected for ambient air modeling requires that every analysis meet minimum requirements for quality in order to develop the necessary population of data to allow modelers to adequately represent the spacial and temporal data necessary for sophisticated models. However, unlike high quality laboratory results, AutoGCs are capable of generating a large amount of data, and this makes the problems associated with real-time review more difficult. Emphasis on data completeness necessitates that equipment be fully automated and run unattended generating data on up to 59 VOC components hourly. Operators must be able to evaluate instrument performance in real time with minimum interruptions.
Orsat has been involved in the PAMS monitoring program of the Texas Commission on Environmental Quality (TCEQ) for over 20 years, and helped establish the needed automation and quality control process necessary to maintain the high quality hourly data Texas has come to depend on in this highly industrialized area. Texas currently maintains an extensive network of over 35 AutoGC system which report data hourly to their website year round. The configuration and automation of these systems will be discussed along with the quality controls employed to insure the accuracy, validity, and consistency of the data produced.
Carol Meyer has been actively involved with PAMS monitoring since the initial 1993 Coastal Ozone Assessment for Southeastern Texas (COAST) study. Orsat, LLC has provided ambient monitoring services to both state and industry, and currently operates 25 PAMS AutoGC monitoring sites in Texas for the TCEQ, UT CEER and AECOM. Using both the PerkinElmer Ozone Precursor system and the Agilent GC System with a Markes Unity 2 thermal desorber, Orsat has developed a fully automated application for the continuous monitoring of 56 NMHCs hourly.
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Separation Science, in collaboration with PerkinElmer, has developed a multi-speaker eSeminar covering methods and applications in environmental analysis. This two-session event will provide analytical scientists and laboratory managers/directors working in this field with access to leading techniques, best practice and robust methods from leading scientists in the field.
About Orsat The EPA deadline for installation of AutoGCs at NCore sites is less than a year away. Don't miss this opportunity to get an up close look at the AutoGC system currently monitoring 56 non-methane hydrocarbons (NMHCs) 24 hours a day seven days a week at over 35 sites across Texas. All that raw data is ideal for modeling, but difficult to handle when precision and accuracy are paramount, but Orsat can boast over 20 years of experience with continuous unattended ambient air VOC monitoring including its earliest implementation in the State of Texas Coastal Oxidant Assessment for Southeast Texas (COAST) program in 1994. Today, Orsat’s services encompass all aspects of site operation from deployment to operator training and application assistance in topics ranging from Microsoft Windows operation to gas chromatographic theory.
Over the past two decades, Orsat has deployed over 40 sites and currently maintains over 35 sites in the state of Texas for both public and private industry. In particular, Orsat has worked closely with the Texas Commission on Environmental Quality (TCEQ) to monitor air quality in the Barnett and Eagle Ford Shale Formations. Orsat is a State of Texas certified Historically Underutilized Business.