CC-1000_2018

CC-1000 Companion Guidance (1-2018) CC-1000 Companion Guidance CG Page of 12 Informational 8 REFERENCE TABLE 2 Perforated Pipe — Inlet Air Transfer Capacity for Soil Gas * Air pathways between granules are calculated based on aggregates that contain less than 5% fines to result in an unobstructed void around each grain that is nominally 21.5% of the surface area dimension that is otherwise obstructed by the grain. ** The specification of 1.0 in 2 /ft (6.5 cm 2 /m) for combined pipe hole or slot openings is the minimum cited in most published standards for perforated pipe. Inlet Air Transfer Capacity for Perforated Pipe in Gravel inch cm sq in cm 2 Inch cm sq in cm 2 Feet Meters 3 7.6 7.1 45.6 0.50 1.3 335 2,161 28 8.5 0.63 1.6 214 1,383 18 5.4 0.75 1.9 149 960 12 3.8 1.50 3.8 37 240 3 0.9 inch cm sq in cm 2 Inch cm sq in cm2 4 10.2 12.6 81.0 0.50 1.3 595 3,841 50 15.1 178% bigger than 3" pipe 0.63 1.6 381 2,458 32 9.7 0.75 1.9 265 1,707 22 6.7 1.50 3.8 66 427 6 1.7 inch cm sq in cm 2 Inch cm sq in cm2 6 15.2 28.3 182.3 0.50 1.3 1,340 8,642 112 34.0 225% bigger than 4" pipe 0.63 1.6 857 5,531 71 21.8 0.75 1.9 595 3,841 50 15.1 1.50 3.8 149 960 12 3.8 inch cm sq in cm 2 Inch cm sq in cm2 8 20.3 50.2 324.1 0.50 1.3 2,381 15,364 198 60.5 178% bigger than 6" pipe 0.63 1.6 1,524 9,833 127 38.7 0.75 1.9 1,058 6,828 88 26.9 1.50 3.8 265 1,707 22 6.7 inch cm sq in cm 2 Inch cm sq in cm2 10 25.4 78.5 506.5 0.50 1.3 3,721 24,006 310 94.5 156% bigger than 8" pipe 0.63 1.6 2,381 15,364 198 60.5 0.75 1.9 1,654 10,669 138 42.0 1.50 3.8 413 2,667 34 10.5 inch cm sq in cm 2 Inch cm sq in cm2 12 30.5 113.0 729.3 0.50 1.3 5,358 34,569 447 136.1 144% bigger than 10" pipe 0.63 1.6 3,429 22,124 286 87.1 0.75 1.9 2,381 15,364 198 60.5 1.50 3.8 595 3,841 50 15.1 Duct Pipe Nominal I.D. Cross- sectional area Gravel Grain size Specified Gravel Aggregate Pipe Length With Perforations ** 1 in 2 /ft * Air pathways between granules are calculated based on aggregates that contain less than 5% fines to result in an unobstructed void around each grain that is nominally 21.5% of the surface area dimension that is otherwise obstructed by the grain. 2 x Equivalent Inlet Area * (Gravel Face)