mr. leggett, who in addition to be a certified arborist has a bachelor of science degree from california state university fresno in plant sciences, and what that study concludes is that tree should be categorized as a medium sized tree on the tree street list. >> good evening. i'm roy leggett, and the growth rate study is comparing the shoot extension lengths on the known varieties of platinous trees planted here in san francisco. i looked at the segments of growth on young trees, and it is clear that those columbia trees are growing as a slower, more compat growth rate. they should be medium category trees which would be consistent with the bureau of urban forestry's request, and so we do have copies of the study with photographs that clearly show how those measurements interact with the overall growth rate. mr. crawford is here, as well, and can certainly speak to this particular issue. >> hello. nicholas crawford. i'm an arborist and also a counselor on the urban forestry council. i wanted to speak to this because i think this is an example of a great scenario where the bureau had to