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. ScanlUS. Methodology White Paper Trackina Residential Growth after the 2000 Census: The Scan/US MlcroGrJd'" Difference Valencia California, like thousands of similar suburban communities in the United States, underwent major growth in the '90s and the pace of its expansion has not slowed in the first decade of 2000. New housing continues to come online in quantity and on large tracts of undeveloped land. In order to account for this new residential development in its household counts, to place the households on the streets Where they live and to attach to them a demographic profile, Scan/US has developed a National Household Growth Tracking process. These new consumers are now tracked on the national landscape using Scan/US, Inc's unique MicroGrid cartography. Microgrids - grid squares as small as 1116 of a square mile -- allow the mar1<et analyst to directly estimate the impact of the updated consumer base on nearby retail activity. To explain how Scan/US, Inc. identifies household change at the street level and then distributes these households to our unique MicroGrid cartography, let us examine one particular census block group, BG (6 37) 9201.07-1,ln Valencia CA, as it undergoes its update process. Although this block group is one of tens of thousands of neighbomoods in the United States that have experienced household growth over the past four years, its story is unique enough to make the strengths of Scan/US. Inc.'s update methodology and MicroGrid cartography clear in the telling. Block group 9201.07-1 is typical of a Census 2000 block group encompassing undeveloped land on the edge of suburban sprawl and ripe for development in this decade (see Map 1). The block group is large, covering 5 square miles. While the block group contains an office park development, it had no residents at the time of the 2000 Census. On the southwest the ~ - -- -- - .-- -,... 02!M~"" lleo(ll37)ll2l>>Ol-1 ..- L__