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Percolation Rate Adjustment and Calculation <br /> Pipe <br /> Assume 1/3 <br /> void space Boring <br /> d1 <br /> d2 <br /> d1 =4.5 inch diamenter hole <br /> d2 =2.0 inch diameter pipe <br /> Adjust = di2 <br /> d2 ' 1/3(d,2-d2 ) <br /> 2.15= 4.52 <br /> 22' 1/3(4.52-2.52) <br /> Adjustment: 2.15 <br /> Perc. Rate =Adjustment x Smallest change <br /> Sys.1 Sys. 2 Sys. 3 Sys. 4 Sys. 5 Sys.6 <br /> Depth 13.0 ft 12.5 ft 12-5 ft 14.5 ft 13.0 ft 13.5 ft <br /> Adjustment 2.15 2.15 2.15 2.15 2.15 2.15 <br /> 6 in/4.06 <br /> Smallest change 6 in/ 15 sec 6 in/ 15 sec 6 in/30sec sec 6in/5 sec 6in/25 sec <br /> or 0.042 or 0.042 or 0.083 or 0.676 or 0.014 or 0.069 <br /> min/in min/in min/in minfin min/in min/in <br /> Perc. Ratel 0.09 min/in 1 0.09 min/in 1 0.18 min/in 1.45 mintin 0.03 min/in 0.15 miNin <br /> p[RJOy <br /> NEIL O.ANDERSON 6 ASSOC.,INC. <br /> �aEwwrx sen�s-eaaHm'Mc taea wz ! <br /> a�'u two o <br /> Rol r-sw ♦rs O��' <br /> plate 10 <br />