... alum 10 ,000 ga=xllwater(500) ( ) (1) (10 ,000)x =×x = 1 10,000500x20lbalum=5gal$5.40 15 gal$==y 515 5.40 81 = × =yy =×= 81 5 $16 .20L16 81_ book.fm Page 44 Tuesday, October 5, 2004 10 : 51 ... ft=×= 2 .17 psiHead (ft) 2. 31 12.2 psi=×28.2 ft5280 ft/mile 4 21, 120 ft×= 21, 120 ft2. 31 ft/psi 914 3 psi=L16 81_ book.fm Page 69 Tuesday, October 5, 2004 10 : 51 AM© 2005 by CRC Press LLC 34 ENVIRONMENTAL ... per liter is a 1. 4% solution?5% 10 02800 gal 14 0 gal×=0.5555 10 00.55 55%===722==×=0. 318 0. 318 10 0 31. 8%3mg/L3mg1L 1, 000,000 mg/L 10 0%=××3 10 000,% = 0.0003% L16 81_ book.fm Page...