Then usable tread depth is compared to remaining tread depth in order to calculate tread wear percentages. For example, a tire that started with 10/32 of original tread depth and has worn off 4/32 (down to 6/32 of remaining tread depth) is 50% worn.
1 If you know the census tract number: Use the IRS list of 2014 Qualified Census Tracts by county. 2  If you have a street address: Visit HUD's interactive QCT Map and enter the property address to view what Census Tract the property is located.
Guide to figuring out what Census tracts cover the area where you work. 1  Print this page and follow these instructions from the printed page. 2  Get on the Web and go to www.census.gov. 3  In the left column, click on American FactFinder: .  Click on the link to factfinder.census.gov to go to the legacy American Factfinder.