... 580,435 67, 920 86,1 27 55,942 Population ZIP codes (areal) 29,466 248 ,70 9, 873 0 112,1 67 8441 12,316 278 5Census tract 61,255 248 ,70 9, 873 0 71 , 872 4060 2394 375 5County 3141 248 ,70 9, 873 52 8,863,164 ... 42,682 3,568 ,78 5 0 98,484 84 676 17 ZIP codes (areal) 29,483 3,268,020 0.011 18,555 111 380 40.5Census tract 61,386 3 ,77 9,518 0 61,586 62 593 2.2County 3141 3,560,536 1.8 156 ,74 1 1134 377 7 619State ... Chapter 4, environmental modeling and monitoring have pro-vided us with some data, methods, and models for delineating plume trajectory ofpollutants and thus the impact boundary of single environmental...