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Select Leadership, Set Objectives, and Define Data Requirements 23 The level of precision used to conduct HMCFS can vary in terms of describing how much (quantity) and what kind (characterization) of hazardous materials are transported. Because achieving higher levels of data precision usually requires more effort, Appendix D.3, Let HMCFS Objectives Guide Precision suggests a classification system that helps determine when the addi- tional precision is warranted. It can be used to define data collection requirements for hazmat quantity (e.g., hazmat presence, relative hazmat quantity--small, medium, or large quantities-- or specific hazmat quantity such as number of gallons or pounds transported) and hazmat clas- sification (e.g., whether or not it is hazardous material, chemical/material class/division, UN/NA placard ID, or specific chemical/material name). 2.4 HMCFS Objectives and Public Protection Goals Local entities are often overwhelmed when trying to provide the best possible protection with extremely limited resources. Trying to plan for every possible risk is not only impossible, but also may limit the usefulness of any efforts that are attempted. Appendix D.4, Match Protection Level with HMCFS Objectives, is provided for local entities that are interested in a better understand- ing of public protection goals and how HMCFS objectives are related to those goals.