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Issue	Topics
2011 Fall (PDF, 829 kb)	Multiphase Modeling of Complex Sites \| Project Pitfalls - Graphics \| Introducing the Experts
2011 Summer (PDF, 531 kb)	Waste Water Treatment: Using Isotopes to Determine Denitrification \| Perils of Database Mismanagement \| Introducing the Experts
2011 Winter (PDF, 733 kb)	3D Isotopes: A Powerful New Tool for Remediation Sites \| A Visual Guide to the History of PCBs \| The Software Side of DPRA
2010 Spring (PDF, 600 kb)	EPA Recognizes Zymax Isotopes for Chlorinated Cases \| Fuel Fingerprinting Pt. II: Mid Distillates \| Isotopes for Remedial Optimization
2009 Winter (PDF, 304 kb)	PAHs: Characterization & Forensic Analysis \| GIS - More Than Maps Pt. II \| Planning for Compliance \| The Art of the Audit
2009 Summer (PDF, 264 kb)	Fuel Fingerprinting Pt. I: Gasoline \| GIS - More Than Maps \| New EPA Greenhouse Gas Regs \| "Denitrifier" Nitrate Isotope Analysis
2009 Spring (PDF, 369 kb)	Carbon isotopes can distinguish plumes \| Age dating a PCE release \| Thermal remediation of DNAPL \| What is an MIP?
2007 Summer (PDF, 140 kb)	Chlorinated solvents and drycleaners – history, sources, and forensic techniques
2006 Winter (PDF, 85 kb)	New isotope technique for chlorinated solvent releases \| Identifying the sources of nitrates \| GRA Isotope Symposium
2006 Spring (PDF, 100 kb)	Forensic sampling of an oil sheen \| Introduction to ZymaX Forensics \| Isotopic forensic analyses \| What is TBA?
2005 Summer (PDF, 121 kb)	Perchlorate: Natural vs. Man-made? \| An in depth look at TCE \| Dating a release using tree rings

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