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13 <br />SUMMARY OF ALL DELINEATIONS <br />Sample <br />Size <br />Average <br />Impervious <br />Median <br />Impervious 1 ERU <br />Single Family 951 3,913 SF 3,556 SF 3,600 SF <br />Total <br />Area <br />Total Impervious <br />Area ERU/AC <br />Apartments 3,819,6015 1,388,611 4.4 <br />Manufactured Home Parks 2,423,736 816,797 4.1 <br />Commercial 7,913,065 4,073,230 6.3 <br />Industrial 9,222,338 5,450,856 7.2 <br />Public 5,742,493 1,221,863 2.6 <br />Sample Size <br />Average <br />Impervious <br />Median <br />Impervious # ERU <br />Townhomes 309 Variable 1 <br />Condos 612 Variable .25 <br />Similar, Group Them <br />Weighted = 4.3 ERU / AC <br />Similar, Group Them <br />Weighted = 6.8 ERU / AC