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1 CHAPTER 1 Project Summary The objective of ACRP Project 10-01, "Optimizing the Use Phase II: Research and Development of Aircraft Deicing and Anti-Icing Fluids," was to identify pro- on Four Selected Topics cedures and technologies that optimize the use of aircraft de- icing and anti-icing fluids, thus reducing their environmental Based on its review of the results of Phase I, the ACRP Project 10-01 technical panel selected four topics for further impact while assuring safe aircraft operations in deicing and research and development in Phase II: anti-icing conditions. The project was intended to produce (1) a description of the application of currently available pro- 1. Fact Sheets for De/Anti-Icing Optimization; cedures and technologies to optimize the use of aircraft de- 2. Holdover Time Variance Across an Airfield; icing and anti-icing fluid (ADAF); (2) validation of the effec- 3. Increased Use of Spot Deicing for Aircraft Frost Removal; tiveness of promising procedures and technologies; (3) a plan and for implementation of these promising procedures and tech- 4. Increased Use of Aircraft De/Anti-Icing Fluid Dilutions. nologies; and (4) recommendations for further study. Fact Sheets for De/Anti-Icing Optimization Phase I: Promising De/Anti-Icing Source Reduction Practices Several technologies and procedures identified in Phase I were developed into a set of detailed Fact Sheets for optimiz- Phase I of the project consisted of a literature review of air- ing ADAF use. craft ground deicing-related technical reports; deicing prod- The format followed for development of the Fact Sheets was uct manufacturer reports; and regulatory, government and similar to that used in ACRP Project 02-02, "Managing Runoff industry documentation, guidance material and standards to From Aircraft and Airfield Deicing and Anti-Icing Opera- assist in the identification of technologies and procedures tions." This enabled inclusion of these Fact Sheets within the that could potentially optimize the use of aircraft deicing and overall compendium of Fact Sheets for optimizing ADAF use anti-icing fluids, thus reducing the environmental impact of presented in ACRP Report 14: Deicing Planning Guidelines and operations using these products. In addition, an industry Practices for Stormwater Management Systems. The fact sheets focus group was surveyed for inputs on current practices include a description of the technology or procedure, imple- and optimization strategies. The literature review and focus mentation considerations, and cost information. group survey identified a list of 18 optimization technologies The Fact Sheets developed in this project are presented sep- and procedures for potential future study. Using the Binary arately from this report. Analysis Decision Model, the optimization technologies and procedures were subjected to a ranking exercise, based on a Holdover Time Variance Across an Airfield series of weighed analytical criteria. The analysis resulted in the recommendation of several de/anti-icing optimization Holdover time determination systems (HOTDS) measure technologies and procedures for evaluation in Phase II. This meteorological parameters at airport sites that are then used effort is described in Chapter 2 of this report. Appendixes A to calculate expected fluid holdover times, thus facilitating bet- through G are available at ter de/anti-icing fluid selection. Task 2 of Phase II examined ProjectDisplay.asp?ProjectID=122. if a single location precipitation sensor can reliably report