Apr. 26 50.00 O.97 3.97 0.14 46 2 1 1,200 16 16 Apr. 27 50.00 2.37 4.00 0.14 52 3 1 1,700 25 17 Apr. 28 50.00 5.33 3.99 0.14 45 4 1 Sunday. Washed. Apr. 29 50.00 0.81 3.99 0.14 44 5 1 600 16 17 Apr. 30 50.00 1.75 3.99 0.14 39 6 1 550 27 12 - - - - - - - - May 1 50.00 0.80 3.99 0.14 31 5 1 500 24 11 Washed. May 2 50.00 1.13 4.00 0.14 24 4 1 500 12 16 May 3 50.00 2.09 4.00 0.14 19 3 1 280 30 25 May 4 50.00 3.80 4.00 0.14 16 2 1 400 20 12 May 5 50.00 5.38 4.00 0.14 15 1 1 Sunday. Washed. May 6 50.00 0.91 3.90 0.14 13 1 1 390 50 40 May 7 50.00 1.56 3.90 0.14 12 1 1 190 19 80 May 8 50.00 2.25 3.99 0.14 10 1 1 ... ... ... May 9 50.00 3.37 4.00 0.14 10 1 1 390 21 38 May 10 50.00 5.16 4.00 0.14 10 1 1 300 14 13 Washed. May 11 50.00 1.03 4.00 0.14 12 1 1 390 13 12 May 12 50.00 1.89 4.00 0.14 17 1 1 Sunday. May 13 50.00 3.82 4.00 0.14 35 2 1 600 33 15 May 14 50.00 6.31 4.00 0.14 39 3 1 500 27 7 Washed. May 15 50.00 0.85 4.00 0.14 17 2 1 500 20 29 May 16 50.00 1.42 3.99 0.14 24 2 1 290 19 40 May 17 50.00 2.47 3.99 0.14 18 2 1 260 19 16 May 18 50.00 4.31 4.00 0.13 15 1 1 190 16 20 Washed. May 19 50.00 0.83 3.99 0.13 12 1 1 Sunday. May 20 50.00 1.66 4.00 0.13 12 1 1 260 17 41 May 21 50.00 3.83 4.00 0.13 16 1 1 260 26 25 Washed. May 22 50.00 0.82 3.99 0.13 20 1 1 280 16 19 May 23 50.00 1.64 4.00 0.13 15 1 1 130 20 22 May 24 50.00 3.85 4.00 0.13 15 1 1 170 17 32 Washed. May 25 50.00 0.84 4.00 0.13 15 1 1 340 25 55 May 26 50.00 1.67 3.99 0.13 18 1 1 Sunday. May 27 50.00 3.03 4.00 0.13 13 1 1 210 10 40 Washed. May 28 50.00 0.87 4.01 0.13 16 1 1 260 26 55 May 29 50.00 1.43 4.01 0.13 16 1 1 500 19 50 May 30 50.00 2.55 4.00 0.13 14 1 1 Holiday. May 31 50.00 4.19 4.00 0.13 17 1 1 380 22 50 - - - - - - - - June 1 50.00 6.26 3.99 0.13 15 1 1 900 27 50 Washed. June 2 50.00 0.78 3.98 0.13 17 1 1 Sunday. June 3 50.00 1.19 4.00 0.13 24 1 1 550 41 50 June 4 50.00 2.15 4.00 0.13 37 2 1 6,500 150 60 June 5 50.00 3.67 4.01 0.13 65 4 1 3,200 150 46 June 6 50.00 6.06 4.00 0.14 77 12 1 1,500 60 27 Washed. June 7 50.00 0.86 4.00 0.14 64 19 1 2,100 68 45 June 8 50.00 1.41 4.00 0.14 46 16 1 600 35 44 June 9 50.00 2.62 4.01 0.14 44 12 1 Sunday. June 10 50.00 4.79 4.00 0.14 36 8 1 240 31 35 Washed. June 11 50.00 0.77 4.00 0.14 30 6 1 280 47 47 June 12 50.00 1.20 4.01 0.14 34 6 1 330 70 55 June 13 50.00 2.42 4.00 0.14 35 8 1 480 43 75 June 14 50.00 4.44 4.00 0.15 31 7 1 440 55 45 Washed. June 15 50.00 0.80 3.99 0.15 32 6 1 420 17 34 June 16 50.00 1.15 4.00 0.15 26 5 1 Sunday. June 17 50.00 2.15 3.99 0.14 26 5 1 340 55 37 June 18 50.00 4.36 4.00 0.14 31 6 1 440 14 140 Washed. June 19 50.00 0.79 4.01 0.15 37 8 1 500 70 24 June 20 50.00 1.19 4.00 0.15 30 7 1 330 49 27 June 21 50.00 2.65 3.98 0.14 25 5 1 170 30 18 June 22 50.00 5.58 4.00 0.14 20 4 1 100 18 13 Washed. June 23 50.00 0.85 3.62 0.13 26 3 1 Sunday. June 24 50.00 2.02 3.99 0.13 140 11 1 1,700 27 36 June 25 50.00 4.77 3.99 0.13 130 26 1 400 70 23 Washed. June 26 50.00 0.73 4.01 0.13 82 27 1 750 200 41 June 27 50.00 1.17 4.01 0.13 65 18 1 ... ... ... June 28 50.00 3.10 3.99 0.13 47 16 1 ... 20 ... Washed. June 29 50.00 0.67 3.99 0.13 37 7 1 220 35 29 June 30 50.00 1.02 4.00 0.13 30 6 1 Sunday. - - - - - - - - July 1 50.00 2.70 3.99 0.13 30 6 1 400 46 3 Washed. July 2 50.00 0.69 4.00 0.13 32 7 1 180 80 38 July 3 50.00 1.21 3.99 0.13 36 8 1 350 70 90 July 4 50.00 3.40 3.99 0.13 44 10 1 Holiday. Washed. July 5 50.00 0.77 3.99 0.13 44 11 1 550 180 34 July 6 50.00 1.19 4.01 0.13 39 10 1 250 60 26 July 7 50.00 3.72 3.99 0.13 34 8 1 Sunday. Washed. July 8 50.00 0.78 3.97 0.13 25 5 1 220 31 21 July 9 50.00 1.27 3.98 0.13 22 4 1 50 10 9 July 10 50.00 3.11 4.09 0.13 47 9 1 Lost. Washed. July 11 50.00 0.83 3.99 0.13 90 19 1 150 19 8 July 12 50.00 1.47 3.99 0.13 97 25 1 300 40 23 July 13 50.00 3.61 4.00 0.13 96 29 1 220 47 16 Washed. July 14 50.00 0.84 3.99 0.13 90 30 1 Sunday. July 15 50.00 1.30 4.00 0.13 95 30 1 375 55 21 July 16 50.00 2.72 3.99 0.14 120 35 1 Lost. 90 13 July 17 50.00 5.08 3.99 0.14 85 32 1 270 2 11 Washed. July 18 50.00 0.85 3.99 0.14 56 22 1 1,675 70 50 July 19 50.00 1.43 4.00 0.14 41 12 1 450 95 22 July 20 50.00 3.23 3.99 0.14 62 19 1 300 38 11 Washed. July 21 50.00 0.80 3.99 0.14 62 21 1 Sunday. July 22 50.00 1.06 3.98 0.14 80 26 1 1,400 150 7 July 23 50.00 2.18 3.99 0.14 105 30 1 3,700 Lost. 11 July 24 50.00 4.95 3.98 0.15 95 30 1 770 Lost. 22 Washed. July 25 50.00 0.84 3.98 0.15 77 22 1 250 33 11 July 26 50.00 1.22 3.98 0.15 67 19 1 140 100 4 July 27 50.00 2.36 4.00 0.16 54 15 1 300 95 7 July 28 50.00 4.74 3.98 0.16 46 12 1 Sunday. Washed. July 29 50.00 0.83 3.99 0.17 36 10 1 470 110 18 July 30 50.00 1.02 4.00 0.17 29 7 1 Plates lost. July 31 50.00 1.66 4.00 0.17 21 5 1 Plates lost. - - - - - - - - Aug. 1 48.20 2.95 4.00 0.17 16 4 1 Plates lost. Aug. 2 46.40 4.96 4.00 0.17 15 2 1 130 42 13 Washed. Aug. 3 42.60 0.79 4.00 0.17 16 1 1 120 4 16 Aug. 4 49.10 0.91 4.00 0.17 21 1 1 Sunday. Aug. 5 49.10 1.59 4.00 0.17 29 1 1 230 160 11 Aug. 6 48.20 3.16 4.00 0.17 34 2 1 85 200 12 Aug. 7 45.60 5.65 3.99 0.17 21 2 1 200 Lost 4 Washed. Aug. 8 50.00 0.80 3.99 0.17 19 2 1 100 70 11 Aug. 9 49.10 0.94 4.00 0.17 16 1 1 75 44 9 Aug. 10 48.20 1.51 4.00 0.17 24 1 1 60 13 6 Aug. 11 48.20 3.32 4.00 0.17 62 3 1 Sunday. Washed. Aug. 12 41.90 0.83 3.99 0.17 120 14 1 620 110 5 Aug. 13 49.10 1.14 3.99 0.17 107 29 1 820 53 36 Aug. 14 49.10 1.72 4.00 0.18 82 30 1 850 160 110 Aug. 15 48.20 3.30 4.00 0.18 65 22 1 150 37 4 Aug. 16 46.40 0.84 4.00 0.19 45 15 1 270 110 13 Aug. 17 48.20 1.05 4.00 0.19 35 10 1 340 110 6 Aug. 18 50.00 1.54 4.00 0.19 21 5 1 Sunday. Aug. 19 49.10 2.29 4.00 0.19 18 4 1 180 85 13 Aug. 20 49.10 3.74 3.99 0.19 20 2 1 210 85 8 Washed. Aug. 21 44.10 1.01 3.98 0.19 20 2 1 1300 115 9 Aug. 22 45.60 1.86 4.00 0.19 27 2 1 3800 265 1 Aug. 23 47.30 4.08 3.99 0.19 49 2 1 2500 70 13 Washed. Aug. 24 41.30 1.29 3.97 0.19 36 6 1 3900 46 6 Aug. 25 44.10 2.11 3.98 0.20 34 7 1 Sunday. Aug. 26 48.20 3.42 3.99 0.20 21 5 1 700 140 0 Aug. 27 48.20 5.10 4.00 0.20 19 4 1 470 100 4 Washed. Aug. 28 46.40 1.28 4.00 0.20 18 3 1 500 49 3 Aug. 29 41.90 1.90 4.02 0.20 17 2 1 360 80 0 Aug. 30 45.60 3.23 4.00 0.20 15 1 1 320 190 1 Aug. 31 46.40 4.57 4.00 0.20 13 1 1 200 20 3 - - - - - - - - Sept. 1 50.00 5.17 3.65 0.20 14 1 1 Sunday. Sept. 2 48.20 5.97 4.00 0.20 12 1 1 Holiday. Washed. Sept. 3 47.30 1.13 4.00 0.20 12 1 1 300 9 1 Sept. 4 48.20 2.01 4.00 0.20 16 1 1 600 60 2 Sept. 5 46.40 5.41 3.67 0.20 34 1 0 360 72 ... Washed. Sept. 6 40.60 1.42 3.98 0.20 160 12 0 15000 140 0 Sept. 7 42.60 5.19 3.99 0.20 64 18 1 2000 130 1 Washed. Sept. 8 42.60 1.25 4.00 0.20 56 18 1 Sunday. Sept. 9 46.40 3.07 4.00 0.22 59 18 1 220 80 4 Washed. Sept.10 45.60 1.02 3.99 0.23 57 16 1 18000 57 8 Sept.11 48.20 2.36 4.00 0.23 65 18 1 2700 90 1 Washed. Sept.12 44.10 1.14 3.99 0.24 72 18 1 1000 47 4 Sept.13 46.40 3.61 3.99 0.25 87 20 1 2300 77 5 Washed. Sept.14 38.20 1.42 3.97 0.26 72 19 1 2400 80 5 Sept.15 45.60 4.27 4.00 0.27 65 18 1 Sunday. Washed. Sept.16 40.00 1.06 3.99 0.28 65 18 1 Lost. 22 Lost. Sept.17 46.40 2.48 4.01 0.28 52 16 1 420 75 1 Washed. Sept.18 46.40 1.11 4.00 0.28 60 13 1 900 37 3 Sept.19 46.40 2.76 4.00 0.28 85 16 1 2000 186 0 Washed. Sept.20 44.10 1.12 4.00 0.31 100 19 1 4200 110 7 Sept.21 48.20 2.07 3.99 0.33 120 24 1 1100 110 3 Washed. Sept.22 44.10 1.30 3.67 0.34 137 29 1 Sunday. Sept.23 45.60 3.79 3.99 0.39 112 25 1 2400 50 2 Washed. Sept.24 45.60 1.15 3.97 0.40 100 25 1 4000 69 4 Sept.25 48.20 2.06 4.00 0.42 432 53 1 56000 680 0 Sept.26 Stopped, unable to wash preliminary. Sept.28 50.00 1.74 4.00 0.71 127 35 1 ... ... 37 Washed. Sept.29 44.10 2.85 3.99 0.82 105 31 1 Sunday. Sept.30 44.90 3.78 3.97 1.04 115 32 1 Lost. Lost. 160 Washed. - - - - - - - - Oct. 1 44.10 1.20 3.98 1.34 82 26 1 600 180 55 Oct. 2 49.10 3.22 3.97 1.54 65 19 1 4,400 120 5 Washed. Oct. 3 44.10 1.31 3.97 1.56 59 17 1 900 55 10 Oct. 4 49.10 2.97 3.97 1.65 55 15 1 850 60 6 Washed. Oct. 5 44.90 1.31 3.98 1.75 59 16 1 2,000 110 38 Oct. 6 46.40 3.65 3.99 1.89 59 17 1 Sunday. Washed. Oct. 7 44.90 1.34 3.98 1.99 52 13 1 1,250 70 15 Oct. 8 49.10 3.49 3.98 2.17 54 13 1 11,000 65 6 Washed. Oct. 9 44.10 1.20 3.97 2.33 51 13 1 2,000 85 4 Oct. 10 49.10 2.22 3.98 2.55 50 12 1 800 36 10 Oct. 11 46.40 4.59 4.00 2.51 47 11 1 2,000 57 10 Oct. 12 Shut off to remove sand in preliminary filter in order to clean out the under-drains. - - - - - - - - Nov. 5 50.00 1.38 3.97 3.49 185 50 1 ... ... ... Nov. 6 48.20 3.25 3.98 3.79 170 52 1 5,000 1,500 240 Washed. Nov. 7 45.60 1.18 3.98 4.05 100 35 1 14,000 1,000 220 Nov. 8 48.20 4.08 3.99 4.37 95 32 1 1,900 270 160 Nov. 9 42.00 6.58 3.98 4.39 80 27 1 4,000 500 190 Nov. 10 Shut down for scraping. Removed 266,000 cu. cm. of sand. Nov. 12 50.00 0.98 3.99 0.25 40 10 1 ... ... ... Nov. 13 50.00 1.51 4.00 0.22 36 8 1 1,600 750 85 Nov. 14 48.20 2.60 4.00 0.21 42 11 1 2,700 700 210 Nov. 15 47.30 3.80 4.00 0.20 35 9 1 1,800 350 180 Nov. 16 47.30 4.87 4.00 0.19 26 5 1 1,100 200 34 Nov. 17 50.00 5.75 4.00 0.19 20 4 1 Sunday. Nov. 18 50.00 6.41 4.00 0.19 17 3 1 1,600 290 55 Washed. Nov. 19 48.20 1.06 3.99 0.20 16 2 1 1,300 480 60 Nov. 20 48.20 2.05 3.99 0.20 45 3 1 6,500 3,700 800 Nov. 21 48.20 3.48 3.99 0.20 52 9 1 9,900 4,000 300 Nov. 22 47.30 4.85 3.99 0.20 65 17 1 10,000 1,000 380 Nov. 23 48.20 6.11 3.99 0.20 49 15 1 18,000 1,000 320 Washed. Nov. 24 46.40 3.71 3.98 0.20 134 24 1 Sunday. Nov. 25 Shut down for fear of washing preliminary with such muddy water. Nov. 29 50.00 1.55 4.00 0.21 80 25 1 ... ... ... Nov. 30 47.30 3.14 3.98 0.22 54 16 1 3,800 950 160 - - - - - - - - Dec. 1 47.30 4.48 3.98 0.23 37 10 1 Sunday. Dec. 2 47.30 5.63 3.98 0.25 36 6 1 2,900 550 90 Washed. Dec. 3 46.40 0.98 3.99 0.25 29 6 1 2,900 480 75 Dec. 4 50.00 1.15 3.99 0.26 20 4 1 2,000 270 70 Dec. 5 50.00 1.48 4.00 0.25 18 3 1 1,100 270 50 Dec. 6 48.20 2.04 3.63 0.25 16 2 1 3,000 ... ... Dec. 7 48.20 2.80 4.00 0.26 14 1 1 2,400 190 10 Dec. 8 50.00 3.40 3.72 0.27 12 1 1 Sunday. Dec. 9 49.10 3.93 4.00 0.27 11 1 1 1,200 170 7 Dec. 10 49.10 4.50 4.00 0.27 12 1 1 800 90 55 Dec. 11 48.20 5.52 4.00 0.27 255 44 1 6,500 - - Dec. 12 Shut down 12/11 at 6 P. M. turbidity too high to wash. Dec. 15 - - - - - - - Sunday. Dec. 16 50.00 4.02 3.99 0.28 90 35 2 - - - Washed. Dec. 17 40.00 1.90 3.97 0.30 70 25 2 21,000 10,000 1,200 Washed. Dec. 18 44.10 1.08 3.97 0.31 49 15 2 6,500 4,200 800 Dec. 19 48.20 1.88 3.98 0.31 39 10 1 Lost. Lost. Lost. Dec. 20 46.40 4.77 3.99 0.31 42 13 1 " " " Dec. 21 46.40 6.68 3.99 0.32 26 6 1 " " " Washed. Dec. 22 49.10 1.14 3.99 0.32 20 4 1 Sunday. Dec. 23 49.10 2.17 4.00 0.31 34 7 1 1,400 300 100 Dec. 24 49.10 3.76 4.00 0.31 195 56 1 9,000 950 70 Dec. 25 Shut down 12/24 at 9 P.M. turbidity too high to wash. Holiday Dec. 30 50.00 2.61 3.97 0.33 56 19 2 - - - Dec. 31 44.80 5.57 3.98 0.36 39 12 1 - - - Washed. - - - - - - - - 1908. - - - - - - - - Jan. 1 46.40 1.30 3.98 0.36 31 6 1 Holiday. Jan. 2 48.20 3.36 4.00 0.36 39 9 1 - - - Jan. 3 47.30 4.95 3.99 0.35 36 9 1 3,100 490 90 Jan. 4 50.00 5.28 3.99 0.35 32 7 1 2,400 240 43 Jan. 5 49.10 6.26 4.00 0.35 26 5 1 Sunday. Washed. Jan. 6 49.10 0.99 3.98 0.35 20 4 1 600 200 37 Jan. 7 50.00 1.15 4.00 0.35 20 4 1 1,100 150 47 Jan. 8 50.00 1.41 4.00 0.35 22 4 1 1,900 160 30 Jan. 9 49.10 1.92 4.00 0.35 45 11 1 13,000 1,300 70 Jan. 10 49.10 2.56 4.00 0.36 70 25 1 10,000 3,500 170 Jan. 11 50.00 3.17 3.99 0.37 56 18 1 16,000 4,000 240 Jan. 12 49.10 3.73 4.00 0.37 40 10 1 Sunday. Jan. 13 50.00 4.14 4.00 0.37 110 45 2 8,500 1,200 840 Jan. 14 49.10 4.65 3.99 0.38 210 95 3 16,000 3,900 500 Jan. 15 49.10 5.23 3.99 0.41 325 190 12 24,000 7,000 550 Jan. 16 50.00 5.75 3.99 0.43 360 210 37 28,000 8,500 1,200 Jan. 17 49.10 6.34 4.00 0.45 242 122 24 65,000 15,000 1,700 Jan. 18 - - - - - - - - - - Jan. 19 50.00 1.17 4.00 0.46 117 40 12 Sunday. Jan. 20 50.00 1.38 4.00 0.46 72 31 6 1,600 1,800 320 Jan. 21 50.00 1.68 3.57 0.37 55 20 4 5,000 450 Jan. 22 49.10 2.04 4.00 0.44 49 17 3 3,600 600 100 Jan. 23 50.00 2.47 3.24 0.33 40 12 3 1,800 290 130 Jan. 24 49.10 3.03 3.00 0.34 40 11 2 2,300 270 65 Jan. 25 50.00 3.61 3.00 0.35 39 10 2 1,100 180 60 Jan. 26 49.10 4.18 2.99 0.35 32 7 2 Sunday. Jan. 27 50.00 4.81 3.00 0.35 32 7 2 300 40 24 Jan. 28 48.20 5.45 2.99 0.35 45 12 2 1,200 90 31 Jan. 29 49.10 6.01 2.99 0.35 60 21 2 1,000 230 50 Jan. 30 49.10 6.62 2.99 0.36 57 22 2 1,400 170 48 Washed. Jan. 31 50.00 1.30 2.99 0.36 42 15 2 1,100 190 23 - - - - - - - - Feb. 1 50.00 1.51 2.99 0.37 39 11 2 750 40 31 Feb. 2 50.00 1.78 3.00 0.37 27 7 2 Sunday. Feb. 3 49.10 2.13 3.00 0.37 29 6 2 1,300 200 7 Feb. 4 50.00 2.69 3.00 0.37 25 5 1 600 160 18 Feb. 5 49.10 3.31 2.99 0.37 24 5 1 750 140 41 Feb. 6 50.00 3.89 2.99 0.37 20 4 1 2,000 180 29 Feb. 7 48.20 4.50 2.99 0.37 17 3 1 ... 38 15 Feb. 8 49.10 5.11 2.99 0.37 15 3 1 900 95 24 Feb. 9 49.10 5.65 3.00 0.38 14 3 1 Sunday. Feb. 10 49.10 6.43 2.99 0.38 11 3 1 850 85 21 Feb. 11 50.00 6.90 3.00 0.38 10 3 1 1,000 70 20 Washed. Feb. 12 49.10 1.29 2.99 0.38 8 2 1 750 20 16 Feb. 13 50.00 1.50 2.99 0.39 9 2 1 700 40 11 Feb. 14 50.00 1.80 2.99 0.39 9 2 1 1,200 39 7 Feb. 15 49.10 2.35 3.00 0.39 61 13 1 5,500 600 7 Feb. 16 49.10 3.28 2.99 0.39 80 30 2 Sunday. Feb. 17 48.20 4.85 2.99 0.39 80 29 3 33,000 3,800 130 Feb. 18 47.30 6.39 2.99 0.39 130 44 3 - 2,600 160 Feb. 19 45.50 7.32 2.98 0.40 320 143 6 28,000 6,000 180 Washed. Feb. 22 50.00 1.40 3.00 0.41 85 30 5 Holiday. Feb. 23 50.00 1.77 3.00 0.41 60 21 4 Sunday. Feb. 24 49.10 2.25 2.99 0.41 46 14 3 3,600 2,800 90 Feb. 25 50.00 2.61 3.00 0.41 31 7 2 2,300 140 47 Feb. 26 50.00 3.06 3.00 0.41 30 6 2 3,800 140 45 Feb. 27 48.20 3.65 2.99 0.41 30 5 1 1,300 100 22 Feb. 28 50.00 4.24 3.00 0.41 37 6 1 1,400 100 40 Feb. 29 48.20 5.28 2.99 0.41 123 52 2 13,500 420 40 Washed. - - - - - - - - Mar. 1 44.60 1.56 2.99 0.42 97 39 5 Sunday. Mar. 2 48.20 2.90 2.99 0.42 82 30 4 8,000 320 60 Mar. 3 46.40 4.69 2.98 0.42 87 33 4 11,000 750 30 Mar. 4 47.30 6.13 2.99 0.42 67 24 3 6,000 290 34 Mar. 5 48.20 7.31 2.99 0.42 59 19 3 4,400 220 41 Washed. Mar. 6 49.10 1.53 2.99 0.42 72 24 2 7,000 170 41 Mar. 7 50.00 1.95 3.00 0.43 82 30 2 9,500 210 34 Mar. 8 49.10 2.62 2.99 0.43 92 37 3 Sunday. Mar. 9 50.00 3.19 3.00 0.43 125 56 4 11,000 700 65 Mar. 10 Preliminary filter discontinued and the Puech system started. ================================================

Table 17—Record of Experimental Filter, Puech system.—(Continued.)

Columns: A - Rates, millions of gallons per acre daily. B - Rate, millions of gallons per acre daily. C - Loss of head. D - Applied water. E - Effluent, preliminary filter. F - Effluent, final filter. G - Applied water. H - Effluent, preliminary filter. I - Effluent, final filter.

================================================================== Puech system: Final Turbidity.~ ~Bacteria.~ filter~. Date. - - - - A B C D E F G H I - - - - - - - - - 1908. - - - - - - - - - Mar. 11 265 170 90 53 18 2.99 0.53 155 80 7 6,500 8,500 490 Mar. 12 265 170 90 53 18 2.99 0.60 135 70 7 5,900 6,000 360 Mar. 13 265 170 90 53 18 3.00 0.60 122 52 6 1,900 1,700 140 Mar. 14 265 170 90 53 18 3.00 0.61 97 40 5 1,800 1,600 130 Mar. 15 265 170 90 53 18 2.99 0.64 77 31 4 Sunday. Mar. 16 265 170 90 53 18 3.00 0.69 65 26 3 1,400 1,200 50 Mar. 17 241 155 82 48 16 2.99 0.71 59 19 3 900 200 45 Mar. 18 252 162 86 50 17 2.99 0.75 67 22 2 1,000 700 33 Mar. 19 241 155 82 48 16 2.99 0.78 60 21 2 ... 800 44 Mar. 20 294 189 100 59 20 2.99 0.85 57 18 2 1,300 650 37 Mar. 21 279 179 95 56 19 2.99 0.92 67 21 2 800 600 34 Mar. 22 265 170 90 53 18 2.99 0.99 80 27 2 Sunday. Mar. 23 265 170 90 53 18 2.99 1.06 90 32 2 4,600 1,300 33 Mar. 24 265 170 90 53 18 2.99 1.12 82 34 3 2,500 950 38 Mar. 25 265 170 90 53 18 2.99 1.18 67 27 3 1,600 ... 30 Mar. 26 265 170 90 53 18 2.99 1.22 60 20 3 550 400 24 Mar. 27 265 170 90 53 18 3.00 1.23 59 18 2 950 360 28 Mar. 28 265 170 90 53 18 3.00 1.25 51 14 2 650 230 18 Mar. 29 265 170 90 53 18 2.99 1.28 31 6 2 Sunday. Mar. 30 265 170 90 53 18 2.99 1.36 30 5 1 500 160 25 Mar. 31 265 170 90 53 18 2.99 1.43 39 7 1 750 140 26 - - - - - - - - - Apr. 1 265 170 90 53 18 3.00 1.48 44 9 1 750 60 41 Apr. 2 265 170 90 53 18 2.99 1.56 42 9 1 1,100 140 26 Apr. 3 318 204 108 64 22 2.99 1.63 41 8 1 1,500 47 11 Apr. 4 294 189 100 59 20 2.99 1.70 54 13 1 700 80 35 Apr. 5 279 179 95 56 19 3.00 1.73 50 13 1 Sunday. Apr. 6 279 179 95 56 19 2.99 1.76 41 9 1 440 65 17 Apr. 7 265 170 90 53 18 3.00 1.78 35 6 1 650 65 34 Apr. 8 265 170 90 53 18 3.00 1.79 39 6 1 550 44 10 Apr. 9 265 170 90 53 18 3.00 1.79 40 6 1 390 30 25 Apr. 10 265 170 90 53 18 3.00 1.77 40 6 1 500 27 16 Apr. 11 265 170 90 53 18 3.00 1.78 45 7 1 430 28 28 Apr. 12 265 170 90 53 18 2.99 1.80 52 11 1 Sunday. Apr. 13 265 170 90 53 18 ... 1.81 50 10 1 490 17 26 Apr. 14 Shut down on account of losing water when aqueduct was drained; also cleaned coarse sand filter. Started April 22d. Apr. 23 241 155 82 48 16 ... 1.82 29 4 1 140 600 38 Apr. 24 241 155 82 48 16 3.00 1.87 21 3 1 200 1,000 13 Apr. 25 241 155 82 48 16 2.99 1.95 20 3 1 85 180 25 Apr. 26 252 162 86 50 17 3.00 1.95 24 3 1 Sunday. Apr. 27 241 155 82 48 16 3.00 1.93 18 2 1 95 35 23 Apr. 28 241 155 82 48 16 3.00 1.96 20 2 1 70 24 18 Apr. 29 241 155 82 48 16 2.99 1.97 24 3 1 110 21 24 Apr. 30 241 155 82 48 16 2.99 2.03 21 2 1 70 25 6 - - - - - - - - - May 1 241 155 82 48 16 3.00 2.07 32 4 1 130 20 18 May 2 241 155 82 48 16 2.99 2.12 26 3 1 140 16 12 May 3 241 155 82 48 16 2.99 2.17 22 3 1 Sunday. May 4 241 155 82 48 16 3.00 2.19 19 2 1 85 30 17 May 5 241 155 82 48 16 3.00 2.20 18 2 1 130 33 9 May 6 241 155 82 48 16 2.99 2.23 18 2 1 230 55 6 May 7 252 162 86 50 17 3.00 2.24 19 2 1 160 75 10 May 8 241 155 82 48 16 3.00 2.25 19 2 1 375 55 8 May 9 318 204 108 64 22 2.99 2.29 18 2 1 1,200 12 9 May 10 318 204 108 64 22 2.99 2.30 30 3 1 Sunday. May 11 265 170 90 53 18 2.99 2.33 60 10 1 2,800 130 11 May 12 252 162 86 50 17 2.99 2.39 70 15 1 2,900 135 9 May 13 241 155 82 48 16 3.00 2.41 66 14 1 1,800 110 16 May 14 265 170 90 53 18 3.00 2.38 45 7 1 2,700 65 18 May 15 252 162 86 50 17 3.00 2.41 39 5 1 950 45 14 May 16 241 155 82 48 16 3.00 2.41 49 7 1 800 32 10 May 17 241 155 82 48 16 3.01 2.34 46 7 1 Sunday. May 18 241 155 82 48 16 3.00 2.31 31 4 1 700 26 6 May 19 252 162 86 50 17 3.00 2.26 36 4 1 375 28 17 May 20 252 162 86 50 17 3.00 2.20 41 5 1 425 38 11 May 21 344 221 117 69 23 3.00 2.18 30 3 1 300 25 9 May 22 241 155 82 48 16 3.01 2.17 53 7 1 950 220 18 May 23 265 170 90 53 18 2.99 2.25 127 38 1 2,400 600 21 May 24 331 212 112 66 22 3.00 2.19 110 39 3 Sunday. May 25 318 204 108 64 22 3.01 2.02 90 25 3 600 300 40 May 26 279 179 95 56 19 3.02 1.87 135 45 3 3,200 110 34 May 27 265 170 90 53 18 3.01 1.63 110 39 3 14,500 320 45 May 28 252 162 86 50 17 3.01 1.41 90 27 3 1,000 95 28 May 29 252 162 86 50 17 3.01 1.24 70 17 3 1,100 150 26 May 30 252 162 86 50 17 3.01 1.07 50 9 2 Holiday. May 31 241 155 82 48 16 3.01 1.03 34 4 2 Sunday. - - - - - - - - - June 1 252 162 86 50 17 3.00 0.83 35 4 1 ... ... ... June 2 241 155 82 48 16 3.00 0.74 39 5 1 ... ... ... June 3 252 162 86 50 17 3.00 0.68 35 4 1 ... ... ... June 4 241 155 82 48 16 3.00 0.63 30 3 1 ... ... ... June 5 252 162 86 50 17 2.99 0.60 30 3 1 ... ... ... June 6 241 155 82 48 16 3.00 0.56 27 3 1 ... ... ... June 7 241 155 82 48 16 2.99 0.53 22 2 1 ... ... ... June 8 241 155 82 48 16 3.00 0.49 20 1 1 ... ... ... June 9 241 155 82 48 16 2.99 0.46 20 1 1 ... ... ... June 10 241 155 82 48 16 3.00 0.44 17 1 1 ... ... ... June 11 331 212 112 66 22 2.98 0.42 12 1 1 ... ... ... June 12 318 204 108 64 22 2.98 0.42 11 1 1 ... ... ... June 13 265 170 90 53 18 3.00 0.40 36 3 1 ... ... ... June 14 252 162 86 50 17 2.99 0.40 39 5 1 ... ... ... June 15 241 155 82 48 16 2.99 0.39 25 3 1 ... ... ... June 16 241 155 82 48 16 2.99 0.40 34 3 1 ... ... ... June 17 252 162 86 50 17 2.99 0.41 64 11 1 ... ... ... June 18 241 155 82 48 16 2.99 0.42 57 11 1 ... ... ... June 19 241 155 82 48 16 2.99 0.42 46 8 1 ... ... ... June 20 241 155 82 48 16 2.99 0.42 40 5 1 ... ... ... June 21 241 155 82 48 16 3.00 0.43 28 4 1 ... ... ... June 22 241 155 82 48 16 2.99 0.43 25 3 1 ... ... ... June 23 241 155 82 48 16 2.99 0.43 25 3 1 ... ... ... June 24 241 155 82 48 16 2.99 0.43 29 4 1 ... ... ... June 25 241 155 82 48 16 2.99 0.43 18 2 1 ... ... ... June 26 241 155 82 48 16 2.80 0.42 15 1 1 ... ... ... June 27 241 155 82 48 16 2.99 0.44 12 1 1 ... ... ... June 28 241 155 82 48 16 2.99 0.44 9 1 1 ... ... ... June 29 241 155 82 48 16 2.99 0.44 8 1 1 ... ... ... June 30 241 155 82 48 16 2.99 0.44 10 1 1 ... ... ... - - - - - - - - - July 1 241 155 82 48 16 3.00 0.45 8 1 1 80 10 4 July 2 241 155 82 48 16 3.00 0.46 8 1 0 290 24 5 July 3 241 155 82 48 16 3.00 0.47 8 1 0 350 45 6 July 4 241 155 82 48 16 2.99 0.49 9 1 0 ... ... ... July 5 305 195 103 61 21 3.00 0.51 10 1 0 ... ... ... July 6 241 155 82 48 16 3.00 0.51 9 1 0 300 36 7 July 7 241 155 82 48 16 2.99 0.53 8 1 0 110 10 3 July 8 252 162 86 50 17 3.00 0.53 9 1 0 85 22 2 July 9 241 155 82 48 16 3.00 0.54 8 1 0 85 26 2 July 10 ... ... ... ... ... ... ... 200 3 5 July 11 305 195 103 61 21 3.00 0.56 12 1 0 145 7 3 July 12 241 155 82 48 16 2.99 0.58 11 1 0 ... ... ... July 13 241 155 82 48 16 3.00 0.60 10 1 0 115 34 55 July 14 241 155 82 48 16 2.99 0.62 16 1 0 300 55 30 July 15 241 155 82 48 16 2.99 0.64 17 1 0 180 32 23 July 16 241 155 82 48 16 3.00 0.67 13 1 0 100 115 3 July 17 241 155 82 48 16 2.99 0.71 10 1 0 65 275 5 July 18 241 155 82 48 16 2.99 0.73 11 1 0 38 425 10 July 19 241 155 82 48 16 3.00 0.76 12 1 0 ... ... ... July 20 241 155 82 48 16 2.99 0.79 10 1 0 95 90 70 July 21 252 162 86 50 17 2.99 0.83 10 1 1 70 17 4 July 22 241 155 82 48 16 2.99 0.87 13 1 1 440 8 5 July 23 305 195 103 61 21 2.99 0.92 54 4 1 650 26 5 July 24 331 212 111 66 22 2.98 0.99 305 61 1 1,650 ... ... July 25 265 170 90 53 18 2.98 1.08 330 85 1 2,600 115 15 July 26 252 162 86 50 17 2.98 1.21 290 77 2 ... ... ... July 27 305 195 103 61 21 2.98 1.40 335 87 2 35,000 250 ... July 28 252 162 86 50 17 2.98 1.68 170 52 2 1,200 1,350 15 July 29 252 162 86 50 17 2.97 2.14 180 52 2 2,000 600 13 July 30 252 162 86 50 17 2.97 2.65 237 56 2 800 1,300 12 July 31 241 155 82 48 16 2.95 3.01 250 60 2 1,000 310 7 =========================================================

Table 18 Record of Experimental Filter Plant No. 2. ================================================ Preliminary Filter. Final Filter. - - - - Date. Rate, Rate, millions of Loss of millions of Loss of gallons per head. gallons per head. acre daily. acre daily. - - - - 1907. - - - - Feb. 8 21.50 0.04 2.81 0.17 Feb. 9 21.60 0.04 1.09 0.06 Feb. 10 20.90 0.05 1.59 0.08 Feb. 11 19.80 0.05 3.01 0.15 Feb. 12 19.70 0.06 3.01 0.14 Feb. 13 19.60 0.06 3.01 0.12 Feb. 14 24.70 0.07 2.65 0.13 Feb. 15 37.20 ... 3.40 0.12 Feb. 16 37.30 ... 3.40 0.11 Feb. 17 Shut down for changes in meters and piping. Feb. 18 ... ... ... ... Feb. 21 44.50 ... 4.36 0.19 Feb. 22 48.60 ... 4.37 0.16 Feb. 23 48.40 ... 4.20 0.15 Feb. 24 48.30 ... 4.02 0.13 Feb. 25 Shut down several hours. 0.14 Feb. 26 48.60 0.04 4.12 0.14 Feb. 27 53.20 0.04 4.08 0.15 Feb. 28 52.80 0.04 4.09 0.15 - - - - Mar. 1 53.00 0.04 4.10 0.16 Mar. 2 53.30 0.04 4.11 0.16 Mar. 3 50.60 0.05 4.11 0.16 Mar. 4 42.40 0.05 4.12 0.17 Mar. 5 42.70 0.05 4.11 0.17 Mar. 6 48.60 0.07 4.13 0.17 Mar. 7 50.50 0.08 4.12 0.18 Mar. 8 51.80 0.09 4.12 0.18 Mar. 9 53.00 0.10 4.12 0.18 Mar. 10 54.40 0.12 4.11 0.19 Mar. 11 51.00 0.12 4.12 0.19 Mar. 12 51.20 0.12 4.07 0.19 Mar. 13 50.50 0.12 4.00 0.19 Mar. 14 46.50 0.12 ... 0.20 Mar. 15 45.80 0.12 3.98 0.20 Mar. 16 42.50 0.12 3.97 0.19 Mar. 17 49.30 0.14 3.98 0.19 Mar. 18 52.60 0.16 3.98 0.20 Mar. 19 53.50 0.17 4.01 0.19 Mar. 20 52.90 0.17 3.99 0.18 Mar. 21 48.20 0.16 4.00 0.19 Mar. 22 51.80 0.18 4.01 0.20 Mar. 23 51.60 0.19 4.01 0.20 Mar. 24 48.20 0.17 4.01 0.20 Mar. 25 48.50 0.18 4.01 0.20 Mar. 26 45.90 0.18 3.98 0.20 Mar. 27 50.50 0.20 4.04 0.20 Mar. 28 49.60 0.20 3.92 0.19 Mar. 29 42.20 0.17 3.98 0.19 Mar. 30 48.00 0.22 4.01 0.19 Mar. 31 49.10 0.22 3.99 0.20 - - - - Apr. 1 49.10 0.24 4.00 0.20 Apr. 2 49.70 0.25 4.00 0.20 Apr. 3 51.40 0.27 4.00 0.21 Apr. 4 48.70 0.27 4.00 0.22 Apr. 5 48.10 0.27 4.00 0.22 Apr. 6 Shut down awaiting Mr. Maiguen to apply bone-charcoal. Apr. 7 Removed 1.06 in. of sand. Apr. 8 52.20 0.33 4.05 0.27 Apr. 9 46.90 0.29 4.02 0.29 Apr. 10 47.60 0.31 4.03 0.28 Apr. 11 46.00 0.30 4.04 0.28 Apr. 12 45.40 0.31 4.03 0.29 Apr. 13 45.10 0.32 3.99 0.32 Apr. 14 49.00 0.34 4.00 0.32 Apr. 15 47.80 0.35 3.99 0.33 Apr. 16 47.40 0.36 3.99 0.34 Apr. 17 45.60 0.36 4.00 0.34 Apr. 18 45.70 0.36 4.00 0.34 Apr. 19 45.60 0.37 4.00 0.34 Apr. 20 45.30 0.40 4.00 0.36 Apr. 21 47.20 0.44 3.99 0.38 Apr. 22 45.20 0.42 3.99 0.38 Apr. 23 44.90 0.44 4.05 0.40 Apr. 24 40.50 0.41 4.02 0.44 Apr. 25 39.60 0.41 4.03 0.45 Apr. 26 40.70 0.44 4.05 0.45 Apr. 27 39.30 0.44 4.00 0.44 Apr. 28 34.70 0.43 4.05 0.44 Apr. 29 37.20 0.45 4.00 0.42 Apr. 30 43.00 0.49 4.00 0.41 - - - - May 1 41.30 0.49 4.00 0.41 May 2 42.40 0.49 4.00 0.41 May 3 40.70 0.48 4.00 0.40 May 4 33.80 0.47 4.00 0.39 May 5 26.20 0.43 4.00 0.39 May 6 29.00 0.38 3.99 0.37 May 7 27.60 0.36 ... 0.37 May 8 24.70 0.31 3.99 0.37 Washed. May 9 24.40 0.03 3.98 0.39 May 10 24.80 0.04 4.00 0.42 May 11 50.00 0.06 4.00 0.44 May 12 50.00 0.08 4.00 0.48 May 13 50.00 0.09 4.00 0.47 May 14 50.00 0.10 4.00 0.46 May 15 48.50 0.15 4.00 0.45 May 16 47.00 0.16 4.00 0.46 May 17 47.00 0.16 3.99 0.47 May 18 47.00 0.19 4.00 0.48 May 19 47.00 0.21 3.99 0.51 May 20 46.60 0.24 4.00 0.53 May 21 46.40 0.24 4.00 0.55 May 22 46.40 0.27 4.00 0.58 May 23 46.40 0.29 4.00 0.61 May 24 46.40 0.30 4.00 0.63 May 25 46.40 0.32 4.00 0.66 May 26 46.40 0.34 3.99 0.70 May 27 46.40 0.86 3.99 0.74 May 28 46.40 0.38 3.15 0.76 May 29 46.00 0.44 3.88 0.78 May 30 45.60 0.46 3.99 0.86 May 31 45.60 0.46 4.00 0.92 - - - - June 1 45.60 0.46 4.00 0.98 June 2 45.60 0.48 4.00 1.09 June 3 45.60 0.51 4.00 1.20 June 4 45.60 0.54 4.00 1.32 June 5 45.60 0.55 4.00 1.48 June 6 45.60 0.56 4.01 3.66 June 7 45.00 0.57 4.00 1.80 June 8 45.00 0.57 4.00 1.90 June 9 45.00 0.55 4.01 2.00 June 10 45.00 0.56 4.00 2.09 June 11 45.00 0.58 4.00 2.17 June 12 45.00 0.60 4.01 2.27 June 13 45.00 0.62 4.00 2.36 June 14 45.00 0.63 3.99 2.49 June 15 45.00 0.64 3.99 2.56 June 16 44.70 0.65 4.00 2.63 June 17 44.40 0.64 4.00 2.67 June 18 45.00 0.63 3.98 2.69 June 19 45.00 0.63 4.00 2.73 June 20 45.00 0.62 4.01 2.72 June 21 45.00 0.61 4.01 2.68 June 22 Shut down to scrape and apply asbestos and coke; removed 0.79 in. of sand. June 23 Applied 8 lb. of asbestos and 10 lb. of bone-charcoal. June 25 50.00 0.54 4.00 0.27 June 26 50.00 0.57 4.01 0.46 June 27 50.00 0.63 4.01 0.55 June 28 50.00 0.65 3.99 0.63 June 29 50.00 0.70 4.00 0.73 June 30 50.00 0.77 3.99 0.82 - - - - July 1 50.00 0.87 4.00 0.80 July 2 50.00 0.95 4.01 0.73 July 3 50.00 1.01 4.00 0.66 July 4 50.00 1.03 4.00 0.58 July 5 50.00 1.07 3.99 0.54 July 6 50.00 1.10 4.00 0.52 July 7 50.00 1.14 4.00 0.50 July 8 50.00 1.16 4.00 0.48 July 9 50.00 1.18 4.00 0.46 July 10 50.00 1.20 3.99 0.45 July 11 50.00 1.20 3.99 0.45 July 12 50.00 1.20 4.01 0.44 July 13 50.00 1.15 4.00 0.47 July 14 50.00 1.15 4.00 0.48 July 15 50.00 1.14 3.99 0.48 July 16 50.00 1.19 4.00 0.48 July 17 50.00 1.21 4.00 0.48 July 18 50.00 1.19 3.99 0.50 July 19 50.00 1.16 3.99 0.52 July 20 50.00 1.16 3.99 0.56 July 21 50.00 1.19 3.99 0.63 July 22 50.00 1.20 3.99 0.77 July 23 50.00 1.21 3.99 0.93 July 24 50.00 1.38 3.99 1.07 July 25 50.00 1.17 3.99 1.22 July 26 50.00 1.07 4.00 1.37 July 27 50.00 1.11 4.00 July 28 50.00 1.22 3.98 1.65 July 29 50.00 1.21 4.00 1.82 July 30 50.00 1.20 3.99 1.98 July 31 50.00 1.20 3.99 2.11 - - - - Aug. 1 51.00 1.21 3.99 2.27 Aug. 2 51.00 1.21 3.99 2.43 Aug. 3 51.00 1.21 4.00 2.66 Aug. 4 50.00 1.21 3.99 2.95 Aug. 5 50.00 1.21 3.98 3.22 Aug. 6 50.00 1.22 3.98 3.50 Aug. 7 50.00 1.21 3.99 3.74 Aug. 8 48.20 1.20 ... 4.09 Aug. 9 50.00 1.18 ... 4.45 Aug. 10 47.30 1.16 ... 4.67 Aug. 11 Shut down to drain and scrape sand filter; O.9 in. depth over all. Aug. 16 Out of service all the rest of month washing sponge and asbestos. - - - - Sept. 3 50.00 0.02 4.00 0.16 Sept. 4 50.00 0.02 3.99 0.14 Sept. 5 50.00 0.02 4.01 0.13 Sept. 6 46.40 0.02 4.00 0.12 Sept. 7 50.00 0.03 4.00 0.11 Sept. 8 46.40 0.04 3.99 0.11 Sept. 9 50.00 0.05 4.90 0.11 Sept. 10 50.00 0.05 4.00 0.11 Sept. 11 50.00 0.06 4.00 0.11 Sept. 12 50.00 0.07 4.00 0.12 Sept. 13 50.00 0.08 4.00 0.12 Sept. 14 50.00 0.09 4.01 0.12 Sept. 15 48.20 0.11 4.00 0.12 Sept. 16 51.00 0.13 4.00 0.12 Sept. 17 50.00 0.14 4.00 0.12 Sept. 18 49.10 0.14 4.00 0.13 Sept. 19 50.00 0.15 4.00 0.13 Sept. 20 49.10 0.17 4.00 0.13 Sept. 21 49.10 0.18 4.00 0.13 Sept. 22 48.20 0.20 4.00 0.13 Sept. 23 49.10 0.19 4.00 0.13 Sept. 24 46.40 0.19 3.99 0.14 Sept. 25 46.40 0.20 4.00 0.14 Sept. 26 45.60 0.24 4.00 0.15 Sept. 27 44.80 0.27 4.00 0.16 Sept. 28 46.40 0.30 3.99 0.16 Sept. 29 46.40 0.31 3.99 0.16 Sept. 30 46.40 0.31 4.00 0.17 - - - - Oct. 1 48.20 0.33 4.00 0.18 Oct. 2 50.00 0.33 4.01 0.19 Oct. 3 48.20 0.33 4.00 0.19 Oct. 4 48.20 0.34 4.00 0.19 Oct. 5 50.00 0.38 4.00 0.19 Oct. 6 48.20 0.41 4.00 0.19 Oct. 7 48.20 0.42 4.00 0.19 Oct. 8 50.00 0.42 4.00 0.19 Oct. 9 44.80 0.40 4.00 0.19 Oct. 10 48.20 0.42 4.00 0.19 Oct. 11 48.20 0.43 4.00 0.20 Washed. Oct. 12 50.00 0.14 4.00 0.20 Oct. 13 47.30 0.15 4.00 0.21 Oct. 14 50.00 0.18 4.00 0.22 Oct. 15 53.00 0.20 4.00 0.23 Oct. 16 50.00 0.20 4.00 0.24 Oct. 17 50.00 0.21 4.00 0.25 Oct. 18 50.00 0.21 4.00 0.25 Oct. 19 50.00 0.21 4.00 0.25 Oct. 20 50.00 0.22 4.00 0.25 Oct. 21 50.00 0.23 4.00 0.25 Oct. 22 50.00 0.24 4.00 0.26 Oct. 23 50.00 0.25 4.00 0.26 Oct. 24 50.00 0.26 4.00 0.26 Oct. 25 50.00 0.27 4.00 0.27 Oct. 26 50.00 0.28 4.00 0.27 Oct. 27 50.00 0.29 4.00 0.27 Oct. 28 50.00 0.30 4.00 0.27 Oct. 29 50.00 0.31 4.00 0.27 Oct. 30 50.00 0.32 4.00 0.27 Oct. 31 Out of commission. 4-in supply pipe stopped up. - - - - Nov. 4 50.00 0.16 4.00 0.28 Nov. 5 50.00 0.17 4.00 0.28 Nov. 6 50.00 0.18 4.00 0.29 Nov. 7 50.00 0.20 4.00 0.30 Nov. 8 50.00 0.21 4.00 0.32 Nov. 9 50.00 0.22 4.00 0.34 Nov. 10 50.00 0.23 4.00 0.36 Nov. 11 50.00 0.24 3.46 0.38 Nov. 12 50.00 0.26 3.99 0.40 Nov. 13 50.00 0.27 4.00 0.44 Nov. 14 50.00 0.28 4.00 0.49 Nov. 15 50.00 0.29 4.00 0.55 Nov. 16 50.00 0.30 4.00 0.65 Nov. 17 50.00 0.31 3.98 0.80 Nov. 18 50.00 0.32 3.99 0.98 Nov. 19 50.00 0.34 3.99 1.26 Nov. 20 50.00 0.35 3.98 1.64 Nov. 21 50.00 0.36 3.99 2.03 Nov. 22 50.00 0.37 3.98 2.33 Nov. 23 50.00 0.38 3.99 2.60 Nov. 24 50.00 0.40 3.98 2.85 Nov. 25 48.20 0.45 3.98 3.10 Nov. 26 50.00 0.49 3.98 3.62 Nov. 27 50.00 0.51 3.99 4.15 Nov. 28 50.00 0.54 3.84 4.44 Nov. 29 50.00 0.55 3.67 4.55 Nov. 30 50.00 0.56 3.44 4.65 - - - - Dec. 2 Shut down to scrape sand filter. Dec. 6 50.00 0.64 4.00 0.46 Dec. 7 50.00 0.64 4.00 0.39 Dec. 8 50.00 0.64 4.01 0.35 Dec. 9 50.00 0.65 4.01 0.33 Dec. 10 50.00 0.65 4.00 0.33 Dec. 11 47.30 0.64 4.00 0.35 Dec. 12 46.40 0.70 3.98 0.39 Dec. 13 50.00 0.79 3.98 0.49 Dec. 14 52.00 0.84 3.97 0.65 Dec. 15 49.10 0.84 3.98 0.77 Dec. 16 49.10 0.86 3.97 0.84 Dec. 17 49.10 0.88 3.98 0.91 Dec. 18 48.20 0.89 3.98 0.94 Dec. 19 50.00 0.91 3.98 0.97 Dec. 20 49.10 0.92 3.98 1.03 Dec. 21 50.00 0.94 3.98 1.08 Dec. 22 50.00 0.97 3.98 1.13 Dec. 23 50.00 0.95 3.98 1.19 Dec. 24 47.30 0.93 3.98 1.28 Dec. 25 44.10 0.91 3.97 1.47 Dec. 26 46.40 1.01 3.97 1.63 Dec. 27 50.00 1.11 3.98 1.81 Dec. 28 48.20 1.12 3.99 1.87 Dec. 29 50.00 1.14 3.99 1.85 Dec. 30 49.10 1.15 3.98 1.86 Dec. 31 50.00 1.17 4.00 1.87 - - - - 1908. - - - - Jan. 1 50.00 1.18 3.98 1.90 Jan. 2 50.00 1.18 3.99 1.94 Jan. 3 50.00 1.19 3.98 1.98 Washed. Jan. 4 50.00 0.17 3.97 2.09 Jan. 5 50.00 0.18 3.98 2.22 Jan. 6 50.00 0.19 3.98 2.28 Jan. 7 50.00 0.20 3.98 2.37 Jan. 8 50.00 0.21 3.99 2.43 Jan. 9 50.00 0.23 3.98 2.52 Jan. 10 50.00 0.24 3.99 2.66 Jan. 11 50.00 0.27 3.98 2.74 Jan. 12 50.00 0.28 3.98 2.83 Jan. 13 49.10 0.30 3.98 2.93 Jan. 14 48.20 0.33 3.99 3.04 Jan. 15 46.40 0.35 3.98 3.21 Jan. 16 50.00 0.40 3.98 3.49 Jan. 17 50.00 0.43 3.98 3.86 Jan. 18 50.00 0.46 3.91 3.99 Jan. 19 ... ... ... ... Jan. 20 Scraped. Jan. 21 50.00 0.48 3.00 0.76 Jan. 22 50.00 0.48 3.01 0.60 Jan. 23 50.00 0.49 3.00 0.57 Jan. 24 50.00 0.49 2.99 0.60 Jan. 25 50.00 0.50 2.99 0.65 Jan. 26 50.00 0.50 2.98 0.69 Jan. 27 50.00 0.51 2.99 0.76 Jan. 28 50.00 0.52 2.99 0.82 Jan. 29 50.00 0.55 2.99 0.90 Jan. 30 50.00 0.57 2.98 0.98 Jan. 31 50.00 0.58 2.98 1.08 - - - - Feb. 1 50.00 0.59 2.99 1.16 Feb. 2 49.10 0.60 2.99 1.22 Feb. 3 49.10 0.61 2.98 1.30 Feb. 4 50.00 0.64 2.99 1.40 Feb. 5 50.00 0.66 2.99 1.50 Feb. 6 50.00 0.67 2.99 1.55 Feb. 7 50.00 0.68 3.00 1.56 Feb. 8 50.00 0.69 3.00 1.53 Feb. 9 50.00 0.71 3.00 1.54 Feb. 10 50.00 0.72 2.99 1.60 Feb. 11 50.00 0.74 2.99 1.62 Feb. 12 50.00 0.75 2.98 1.68 Feb. 13 50.00 0.76 2.99 1.74 Feb. 14 48.20 0.76 2.99 1.77 Feb. 15 51.80 0.79 2.99 1.89 Feb. 16 48.20 0.79 2.99 2.08 Feb. 17 48.20 0.81 2.99 2.24 Feb. 18 47.30 0.82 2.99 2.31 Feb. 19 51.80 0.92 2.99 2.45 Feb. 20 52.70 0.99 2.99 2.61 Feb. 21 51.80 1.03 2.99 2.68 Feb. 22 50.90 1.07 2.99 2.72 Feb. 23 50.00 1.09 2.99 2.76 Feb. 24 51.80 1.12 2.99 2.80 Feb. 25 50.00 1.14 2.99 2.84 Feb. 26 50.00 1.17 3.00 2.87 Feb. 27 48.20 1.18 2.99 2.90 Feb. 28 47.30 1.19 2.99 2.94 Feb. 29 51.80 1.23 2.99 3.01 - - - - Mar. 1 48.20 1.20 2.98 2.99 Mar. 2 50.00 1.28 2.99 3.12 Mar. 3 50.90 1.32 2.98 3.22 Mar. 4 50.00 1.33 2.99 3.28 Mar. 5 50.00 1.35 2.99 3.32 Mar. 6 Discontinued; sand filter being used for sedimentation experiments. ============================================

Table 18 (Continued.) ============================================================== Turbidity. Bacteria. - - - - - - Date. Applied Effluent, Effluent, Applied Effluent, Effluent, water. pre- final water. pre- final liminary filter. liminary filter. filter filter. - - - - - - 1907. - - - - - - Feb. 8 ... ... ... 1,100 2,100 ... Feb. 9 ... ... ... 200 550 2,100 Feb. 10 ... ... ... ... ... ... Feb. 11 12 6 2 600 1,160 1,100 Feb. 12 12 5 2 650 400 700 Feb. 13 15 5 2 660 900 700 Feb. 14 15 6 2 650 1,100 900 Feb. 15 12 5 2 600 800 850 Feb. 16 14 4 2 850 950 600 Feb. 17 Shut down for changes in meters and piping. Feb. 18 ... ... ... 1,200 ... 600 Feb. 21 20 6 2 1,800 1,400 800 Feb. 22 15 4 2 Holiday. Feb. 23 20 7 2 1,600 750 380 Feb. 24 20 10 3 Sunday. Feb. 25 20 10 3 1,400 1,000 450 Feb. 26 20 10 3 700 800 260 Feb. 27 17 8 3 700 700 290 Feb. 28 15 8 3 800 650 500 - - - - - - Mar. 1 15 8 3 650 550 200 Mar. 2 15 7 3 1,000 800 300 Mar. 3 31 11 3 Sunday. Mar. 4 35 15 6 1,200 1,500 360 Mar. 5 135 52 10 13,000 850 ... Mar. 6 135 54 12 18,000 8,000 ... Mar. 7 102 46 8 24,000 6,500 1,800 Mar. 8 100 40 6 22,000 6,000 1,600 Mar. 9 90 40 5 24,000 6,000 800 Mar. 10 82 39 6 Sunday. Mar. 11 68 32 7 18,000 4,300 240 Mar. 12 46 25 5 11,000 4,600 210 Mar. 13 40 20 5 9,000 1,500 200 Mar. 14 39 20 4 5,500 1,200 90 Mar. 15 35 18 4 6,500 1,100 150 Mar. 16 60 24 4 5,000 800 160 Mar. 17 135 45 5 Sunday. Mar. 18 170 59 9 9,000 1,700 100 Mar. 19 125 51 8 7,000 1,000 120 Mar. 20 102 40 6 4,800 700 75 Mar. 21 125 42 5 8,500 1,100 90 Mar. 22 190 82 5 7,500 1,100 55 Mar. 23 180 75 6 7,500 1,300 90 Mar. 24 140 68 7 Sunday. Mar. 25 88 40 5 4,400 900 75 Mar. 26 62 32 4 3,600 750 90 Mar. 27 47 25 4 2,200 400 60 Mar. 28 35 16 3 1,300 350 55 Mar. 29 26 12 3 700 180 20 Mar. 30 25 7 3 310 220 39 Mar. 31 21 6 2 Sunday. - - - - - - Apr. 1 20 6 2 600 110 38 Apr. 2 24 6 2 270 110 29 Apr. 3 24 6 2 460 85 31 Apr. 4 20 6 2 280 60 22 Apr. 5 20 5 2 450 70 40 Apr. 6 Shut down awaiting Mr. Maiguen to apply bone-charcoal. Apr. 7 Removed 1.06 in. of sand. Sunday. Apr. 8 18 4 3 330 ... ... Apr. 9 18 4 2 140 60 32 Apr. 10 30 4 1 750 120 28 Apr. 11 66 7 2 4,000 ... 32 Apr. 12 72 20 3 14,000 2,900 85 Apr. 13 80 30 3 13,000 2,500 95 Apr. 14 77 35 4 Sunday. Apr. 15 62 31 4 7,000 1,100 60 Apr. 16 47 27 4 3,600 650 31 Apr. 17 39 21 3 1,600 160 38 Apr. 18 30 13 2 1,810 210 42 Apr. 19 25 9 2 790 190 34 Apr. 20 20 6 2 540 87 23 Apr. 21 20 4 2 Sunday. Apr. 22 18 3 1 235 55 22 Apr. 23 15 3 1 170 45 16 Apr. 24 19 2 1 150 14 14 Apr. 25 34 3 1 700 12 23 Apr. 26 46 4 1 1,200 80 16 Apr. 27 52 4 1 1,700 160 23 Apr. 28 45 5 1 Sunday. Apr. 29 44 6 1 600 60 10 Apr. 30 39 7 1 550 55 15 - - - - - - May 1 31 6 1 500 80 17 May 2 24 5 1 500 80 19 May 3 19 4 1 280 75 48 May 4 16 3 1 400 80 9 May 5 15 1 1 Sunday. May 6 13 2 1 390 100 65 May 7 12 2 1 190 60 19 May 8 10 2 1 ... ... ... Washed. May 9 10 2 1 390 65 10 May 10 10 2 1 300 80 18 May 11 12 2 1 390 110 12 May 12 17 2 1 Sunday. May 13 35 3 1 600 100 18 May 14 39 4 1 500 65 15 May 15 17 3 1 500 70 16 May 16 24 3 1 290 70 16 May 17 18 3 1 260 40 9 May 18 15 2 1 190 ... 17 May 19 12 2 1 Sunday. May 20 12 2 1 260 40 13 May 21 16 2 1 260 65 9 May 22 20 2 1 280 35 12 May 23 15 2 1 130 35 10 May 24 15 2 1 170 26 6 May 25 15 2 1 340 80 13 May 26 18 2 1 Sunday. May 27 13 2 1 210 80 7 May 28 16 2 1 260 70 10 May 29 16 2 1 500 55 12 May 30 14 2 1 Holiday. May 31 17 2 1 380 65 11 - - - - - - June 1 15 2 1 900 48 10 June 2 17 2 1 Sunday. June 3 24 2 1 550 75 16 June 4 37 3 1 6,500 ... 22 June 5 65 5 1 3,200 140 19 June 6 77 16 1 1,500 210 14 June 7 64 27 1 2,100 230 20 June 8 46 22 1 600 240 33 June 9 44 18 1 Sunday. June 10 36 12 1 240 110 43 June 11 30 8 1 280 130 60 June 12 34 8 1 330 150 60 June 13 35 10 1 480 ... 120 June 14 31 9 1 440 ... 65 June 15 32 8 1 420 ... 49 June 16 26 7 1 Sunday. June 17 26 6 1 340 270 55 June 18 31 7 1 440 140 65 June 19 37 10 1 500 110 24 June 20 30 9 1 330 70 34 June 21 25 7 1 170 130 60 June 22 Shut down to scrape and apply asbestos and coke; removed 0.79 in. of sand. June 23 Applied 8 lb. of asbestos and 10 lb. of bone-charcoal. June 25 130 45 1 400 ... ... June 26 82 37 1 750 550 35 June 27 65 26 1 ... 1,200 140 June 28 47 21 1 ... 1,200 26 June 29 37 9 1 220 800 22 June 30 30 8 1 Sunday. - - - - - - July 1 30 8 1 400 90 37 July 2 32 9 1 180 230 25 July 3 36 10 1 350 80 58 July 4 44 12 1 Holiday. July 5 24 14 1 550 130 47 July 6 39 12 1 250 110 33 July 7 34 10 1 Sunday. July 8 25 7 1 220 190 14 July 9 22 5 1 50 30 3 July 10 47 11 1 Lost. Lost. Lost. July 11 90 30 1 150 140 12 July 12 97 35 1 300 110 20 July 13 90 39 1 220 120 14 July 14 90 40 1 Sunday. July 15 95 40 1 375 320 19 July 16 120 45 1 Lost. 150 12 July 17 85 42 1 270 60 5 July 18 56 32 1 1,675 23 39 July 19 41 20 1 450 200 13 July 20 62 29 1 300 220 8 July 21 62 31 1 Sunday. July 22 80 36 1 1,400 700 9 July 23 105 40 1 3,700 370 25 July 24 95 40 1 770 260 31 July 25 77 32 1 250 230 3 July 26 67 29 1 140 90 12 July 27 54 25 1 300 180 6 July 28 46 19 1 Sunday. July 29 36 16 1 470 230 18 July 30 29 11 1 Plates lost. July 31 21 9 1 July " - - - - - - Aug. 1 16 6 1 Plates lost. Aug. 2 15 4 1 130 130 4 Aug. 3 16 3 1 120 80 4 Aug. 4 21 3 1 Sunday. Aug. 5 29 3 1 230 210 4 Aug. 6 34 4 1 85 320 19 Aug. 7 21 4 1 200 Lost. 19 Aug. 8 19 4 1 100 150 17 Aug. 9 16 3 1 75 220 9 Aug. 10 24 3 1 60 250 10 Aug. 11 Shut down to drain and scrape sand filter; O.9 in. depth over all. Aug. 16 Out of service all the rest of month washing sponge and asbestos. - - - - - - Sept. 3 12 5 1 300 ... ... Sept. 4 16 6 1 600 260 370 Sept. 5 34 6 1 360 71 165 Sept. 6 160 52 1 15,000 1,900 120 Sept. 7 64 26 1 2,000 170 62 Sept. 8 56 25 1 Sunday. Sept. 9 59 25 1 220 13 19 Sept. 10 57 21 1 18,000 100 24 Sept. 11 65 25 1 2,700 150 25 Sept. 12 72 26 1 1,000 190 36 Sept. 13 87 30 1 2,300 ... 35 Sept. 14 72 27 1 2,400 130 230 Sept. 15 65 25 1 Sunday. Sept. 16 65 25 1 Lost. Lost. 27 Sept. 17 52 21 1 420 60 29 Sept. 18 60 18 1 900 80 41 Sept. 19 85 22 1 2,000 ... 19 Sept. 20 100 29 1 4,200 300 28 Sept. 21 120 34 1 1,100 160 30 Sept. 22 137 41 1 Sunday. Sept. 23 112 37 1 2,400 90 34 Sept. 24 100 35 1 4,000 210 12 Sept. 25 432 80 1 56,000 510 27 Sept. 26 385 80 4 1,300 450 55 Sept. 27 245 70 3 4,000 240 41 Sept. 28 127 46 2 15,000 430 37 Sept. 29 105 41 2 Sunday. Sept. 30 115 42 1 Lost. 1,600 110 - - - - - - Oct. 1 82 36 1 600 600 120 Oct. 2 65 27 1 4,400 170 47 Oct. 3 59 34 1 900 210 44 Oct. 4 55 20 1 850 200 37 Oct. 5 9 21 1 2,000 150 34 Oct. 6 59 24 1 Sunday. Oct. 7 552 17 1 1,250 200 28 Oct. 8 54 16 1 11,000 210 28 Oct. 9 51 16 1 2,000 310 29 Oct. 10 50 15 1 800 220 16 Oct. 11 47 13 1 2,000 310 46 Washed. Oct. 12 36 11 1 1,200 370 25 Oct. 13 40 15 1 Sunday. Oct. 14 47 19 1 1,200 390 22 Oct. 15 41 16 1 900 140 16 Oct. 16 35 12 1 Lost. 310 18 Oct. 17 30 8 1 550 180 7 Oct. 18 25 6 1 260 100 33 Oct. 19 25 6 1 750 220 15 Oct. 20 20 5 1 Sunday. Oct. 21 19 5 1 480 120 11 Oct. 22 18 4 1 230 70 7 Oct. 23 15 3 1 250 120 12 Oct. 24 15 3 1 300 80 12 Oct. 25 15 2 1 450 60 15 Oct. 26 15 2 1 450 Lost. 14 Oct. 27 13 2 0 Sunday. Oct. 28 13 2 0 190 110 9 Oct. 29 25 2 0 380 ... ... Oct. 30 21 3 0 ... ... ... Oct. 31 Out of commission. 4-in. supply pipe stopped up. - - - - - - Nov. 4 125 11 1 ... ... ... Nov. 5 185 61 1 6,000 3,000 220 Nov. 6 170 66 1 5,000 1,100 150 Nov. 7 100 45 1 14,000 1,600 120 Nov. 8 95 42 1 1,900 2,000 29 Nov. 9 80 36 1 4,000 2,000 110 Nov. 10 67 29 1 Sunday. Nov. 11 52 20 1 1,900 460 160 Nov. 12 40 13 1 7,500 1,100 110 Nov. 13 36 10 1 1,600 550 50 Nov. 14 42 13 1 2,700 950 48 Nov. 15 35 11 1 1,800 900 49 Nov. 16 26 7 1 1,100 360 35 Nov. 17 20 5 1 Sunday. Nov. 18 17 4 1 1,600 200 35 Nov. 19 16 3 1 1,300 400 55 Nov. 20 45 4 1 6,500 3,500 200 Nov. 21 52 12 1 9,900 4,500 130 Nov. 22 65 24 1 10,000 5,500 220 Nov. 23 49 19 1 18,000 3,500 100 Nov. 24 134 32 1 Sunday. Nov. 25 225 87 2 50,000 19,000 340 Nov. 26 237 90 2 40,000 11,000 220 Nov. 27 185 77 2 16,000 7,500 310 Nov. 28 130 57 2 Holiday. Nov. 29 80 36 1 10,000 2,200 80 Nov. 30 54 25 1 3,800 2,200 55 - - - - - - Dec. 2 Shut down to scrape sand filter. Dec. 6 16 3 1 Dec. 7 14 3 1 2,400 1,200 490 Dec. 8 12 2 1 Sunday. Dec. 9 11 2 1 1,200 420 60 Dec. 10 12 2 1 800 950 66 Dec. 11 255 84 3 6,500 1,600 140 Dec. 12 212 100 6 48,000 15,000 1,800 Dec. 13 495 217 9 42,000 20,000 1,600 Dec. 14 357 167 9 49,000 9,500 1,200 Dec. 15 157 76 6 Sunday. Dec. 16 90 42 4 19,000 800 700 Dec. 17 70 31 2 21,000 18,000 1,600 Dec. 18 49 21 2 6,500 7,000 600 Dec. 19 39 13 1 Lost. Lost. Lost. Dec. 20 42 16 1 Dec. Dec. " Dec. 21 26 7 1 Dec. Dec. " Dec. 22 20 5 1 Sunday. Dec. 23 34 9 1 1,400 500 160 Dec. 24 195 75 2 9,000 1,700 130 Dec. 25 445 210 9 Holiday. Dec. 26 370 172 7 51,000 8,000 250 Dec. 27 245 110 5 55,000 5,600 210 Dec. 28 102 46 3 10,000 4,500 140 Dec. 29 75 32 2 Sunday. Dec. 30 56 24 2 4,400 1,900 190 Dec. 31 39 15 1 14,000 1,300 60 - - - - - - 1908. - - - - - - Jan. 1 31 8 1 ... ... ... Jan. 2 39 11 1 4,400 750 45 Jan. 3 36 11 1 3,100 1,600 70 Washed. Jan. 4 32 9 1 2,400 1,200 43 Jan. 5 26 6 1 Sunday. Jan. 6 20 5 1 600 600 49 Jan. 7 20 5 1 1,100 330 49 Jan. 8 22 5 1 1,900 900 43 Jan. 9 45 13 1 13,000 3,400 50 Jan. 10 70 30 1 10,000 8,000 50 Jan. 11 56 22 1 16,000 220 200 Jan. 12 40 12 1 Sunday. Jan. 13 110 51 2 8,500 1,200 43 Jan. 14 210 113 4 16,000 6,000 280 Jan. 15 325 222 15 24,000 9,500 700 Jan. 16 360 247 42 28,000 14,000 900 Jan. 17 242 147 26 65,000 20,000 1,200 Jan. 18 137 73 7 7,000 6,500 400 Jan. 19 ... ... ... Sunday. Jan. 20 Scraped. Jan. 21 55 25 4 ... ... ... Jan. 22 49 21 4 3,600 1,900 150 Jan. 23 40 15 3 1,800 700 170 Jan. 24 40 13 3 2,300 950 90 Jan. 25 39 12 3 1,100 800 95 Jan. 26 32 9 2 Sunday. Jan. 27 32 9 2 300 700 70 Jan. 28 45 15 2 1,200 900 70 Jan. 29 60 26 2 1,000 1,400 95 Jan. 30 57 27 2 1,400 210 33 Jan. 31 42 18 2 1,100 750 45 - - - - - - Feb. 1 39 14 2 750 1,000 70 Feb. 2 27 9 2 Sunday. Feb. 3 29 8 2 1,300 750 20 Feb. 4 25 6 2 600 900 60 Feb. 5 24 6 2 750 200 75 Feb. 6 20 5 2 2,000 800 60 Feb. 7 17 4 1 ... 600 34 Feb. 8 15 4 1 900 220 35 Feb. 9 14 4 1 Sunday. Feb. 10 11 4 1 850 500 28 Feb. 11 10 4 1 1,000 500 23 Feb. 12 8 4 1 750 290 18 Feb. 13 9 4 1 700 260 10 Feb. 14 9 4 1 1,200 250 27 Feb. 15 61 18 1 5,500 4,800 13 Feb. 16 80 40 2 Sunday. Feb. 17 80 40 3 33,000 1,300 60 Feb. 18 130 65 3 ... 950 120 Feb. 19 320 200 7 28,000 22,000 360 Feb. 20 177 97 9 22,000 16,300 350 Feb. 21 105 52 6 10,600 3,800 270 Feb. 22 85 42 5 Holiday. Feb. 23 60 30 4 Sunday. Feb. 24 46 19 3 3,600 1,700 120 Feb. 25 31 9 2 2,300 1,300 60 Feb. 26 30 8 2 3,800 1,300 43 Feb. 27 30 7 1 1,300 900 42 Feb. 28 37 7 1 1,400 800 31 Feb. 29 123 49 2 13,500 750 35 - - - - - - Mar. 1 97 44 5 Sunday. Mar. 2 82 35 4 8,000 2,500 70 Mar. 3 87 38 4 11,000 6,000 55 Mar. 4 67 29 3 6,000 1,400 38 Mar. 5 59 23 3 4,400 2,500 37 Mar. 6 Discontinued; sand filter being used for sedimentation experiments. ===========================================================



Table 19 Record of Experimental Filter Plant. No. 3. ========+===============+============================ Sand Filter. Turbidity. + -+ -+ + - Date. Rate. Loss of Applied Effluent, Effluent, head. water. coagulant. sand. + -+ -+ -+ + - 1907. + -+ -+ -+ + - Feb. 12 2.99 0.18 14 ... 2 Feb. 13 3.00 0.17 15 ... 2 Feb. 14 3.19 0.18 15 ... 2 Feb. 15 3.86 0.22 12 ... 2 Feb. 16 3.84 0.29 14 ... 2 Feb. 17 ... ... ... ... ... Feb. 18 ... ... ... ... ... Feb. 21 3.91 0.32 20 ... 2 Feb. 22 3.95 0.39 15 ... 2 Feb. 23 3.94 0.43 20 ... 3 Feb. 24 3.89 0.47 20 ... 3 Feb. 25 4.19 0.52 20 ... 3 Feb. 26 4.13 0.57 20 ... 3 Feb. 27 3.32 0.62 17 ... 3 Feb. 28 4.41 0.67 15 ... 3 + -+ -+ -+ + - Mar. 1 3.91 0.72 15 ... 3 Mar. 2 3.93 0.79 15 ... 3 Mar. 3 3.90 0.82 31 ... 3 Mar. 4 3.92 0.80 35 ... 3 Mar. 5 3.96 0.98 135 ... 4 Mar. 6 4.05 1.25 135 29 2 Mar. 7 3.95 1.52 102 15 1 Mar. 8 3.90 1.67 100 15 1 Mar. 9 3.93 1.80 90 15 1 Mar. 10 3.95 1.91 82 16 1 Mar. 11 3.96 2.08 68 18 1 Mar. 12 4.02 2.19 46 18 1 Mar. 13 4.02 2.31 40 15 1 Mar. 14 3.96 2.44 39 16 1 Mar. 15 4.07 2.42 35 20 1 Mar. 16 3.85 2.20 60 29 1 Mar. 17 3.95 2.21 135 25 1 Mar. 18 3.88 2.86 170 25 1 Mar. 19 3.82 3.31 125 21 1 Mar. 20 3.78 3.47 102 20 1 Mar. 21 3.71 3.70 125 20 1 Mar. 22 3.64 3.81 190 25 1 Mar. 23 3.58 3.95 180 26 1 Mar. 24 3.46 4.18 140 19 1 Mar. 25 Scraped, 1.03 in. of sand removed. Mar. 27 4.06 0.22 47 8 1 Mar. 28 4.02 0.37 35 ... 0 Mar. 29 4.02 0.46 26 ... ... Mar. 30 Shut down to fill coagulant basin. ... ... 25 ... ... Mar. 31 4.00 0.45 21 15 1 + -+ -+ -+ + - Apr. 1 3.39 0.42 20 15 1 Apr. 2 3.06 0.46 24 17 1 Apr. 3 3.01 0.49 24 17 1 Apr. 4 2.95 0.50 20 15 1 Apr. 5 2.95 0.51 20 13 1 Apr. 6 2.96 0.49 20 12 1 Apr. 7 2.99 0.48 20 12 1 Apr. 8 3.01 0.49 18 12 1 Apr. 9 3.01 0.55 18 12 1 Apr. 10 3.02 0.57 30 15 0 Apr. 11 3.04 0.61 66 16 0 Apr. 12 3.09 0.72 72 13 0 Apr. 13 3.07 0.88 80 19 0 Apr. 14 2.98 1.04 77 18 1 Apr. 15 2.97 1.20 62 18 1 Apr. 16 3.01 1.32 47 17 1 Apr. 17 3.05 1.44 39 19 0 Apr. 18 3.04 1.41 30 20 1 Apr. 19 3.04 1.35 25 18 1 Apr. 20 3.07 1.30 20 15 1 Apr. 21 3.07 1.26 20 15 1 Apr. 22 3.04 1.21 18 12 0 Apr. 23 3.06 1.22 15 10 0 Apr. 24 2.99 1.26 19 10 0 Apr. 25 3.04 1.27 34 12 0 Apr. 26 3.07 1.28 46 12 0 Apr. 27 2.94 1.49 52 ... 0 Apr. 28 2.96 1.88 45 ... 1 Apr. 29 2.99 2.40 44 33 1 Apr. 30 3.00 2.83 39 29 1 + -+ -+ -+ + - May 1 3.01 2.71 31 21 1 May 2 3.01 2.51 24 15 1 May 3 3.00 2.36 19 12 1 May 4 3.01 2.29 16 10 0 May 5 3.01 2.25 15 9 0 May 6 3.06 2.32 13 8 0 May 7 2.96 2.46 12 7 0 May 8 3.00 2.51 10 5 0 May 9 3.00 2.77 10 5 0 May 10 3.01 2.87 10 5 0 May 11 2.99 3.16 12 6 0 May 12 3.00 3.34 17 7 0 May 13 3.00 3.44 35 9 0 May 14 3.01 3.46 39 12 0 May 15 3.01 3.56 17 ... 0 May 16 2.93 4.07 24 ... 0 May 17 3.01 4.34 18 ... 0 May 18 2.93 4.25 15 8 0 May 19 2.97 4.36 12 8 0 May 20 3.01 4.64 12 8 0 May 21 2.99 4.55 16 8 0 May 22 3.01 4.57 20 8 0 May 23 3.00 4.51 15 8 0 May 24 2.98 4.44 15 8 0 May 25 3.00 4.38 15 8 0 May 26 3.00 4.38 18 8 0 May 27 Shut down to scrape sand filter; 1.09 in. of sand removed. May 28 Cleaning coagulant basin and treating coagulant basin with 1:2,000,000 solution of copper sulphate. May 29 16 ... ... May 30 3.00 0.11 14 8 1 May 31 3.01 0.10 17 8 1 + -+ -+ -+ + - June 1 3.01 0.09 15 8 1 June 2 3.01 0.10 17 8 1 June 3 3.01 0.10 24 10 1 June 4 3.04 0.11 37 13 1 June 5 3.00 0.11 65 29 1 June 6 3.00 0.11 77 46 1 June 7 2.99 0.12 64 21 1 June 8 2.98 0.17 46 22 1 June 9 3.00 0.18 44 30 1 June 10 3.01 0.18 36 26 1 June 11 3.00 0.17 30 20 1 June 12 3.00 0.17 34 22 1 June 13 2.99 0.17 35 25 1 June 14 2.98 0.17 31 22 1 June 15 2.99 0.19 32 22 1 June 16 3.02 0.21 26 18 1 June 17 2.99 0.23 26 16 1 June 18 3.02 0.25 31 20 1 June 19 3.02 0.29 37 27 1 June 20 3.00 0.32 30 21 1 June 21 3.01 0.36 25 16 1 June 22 3.00 0.40 20 12 1 June 23 2.97 0.43 26 11 1 June 24 2.97 0.44 140 36 1 June 25 3.02 0.45 130 27 1 June 26 Interrupted, defective meter. June 27 3.00 0.43 65 15 0 June 28 3.00 0.44 47 19 0 June 29 2.99 0.44 37 20 0 June 30 2.97 0.42 30 19 0 + -+ -+ -+ + - July 1 2.99 0.37 30 18 0 July 2 3.01 0.33 32 19 0 July 3 3.00 0.31 36 21 0 July 4 3.00 0.30 44 30 0 July 5 3.00 0.29 44 35 0 July 6 3.00 0.28 39 30 0 July 7 3.00 0.28 34 24 0 July 8 3.00 0.28 25 16 0 July 9 3.00 0.27 22 13 0 July 10 2.98 0.27 47 27 1 July 11 3.00 0.27 90 41 1 July 12 3.00 0.29 97 21 1 July 13 3.00 0.34 90 20 0 July 14 3.00 0.40 90 19 0 July 15 3.00 0.54 95 18 0 July 16 3.00 0.59 120 20 0 July 17 3.00 0.58 85 16 0 July 18 2.99 0.61 56 13 0 July 19 3.01 0.61 41 18 0 July 20 2.99 0.51 62 27 0 July 21 3.00 0.47 62 32 0 July 22 3.00 0.47 80 34 0 July 23 3.01 0.49 105 21 0 July 24 3.01 0.60 95 19 0 July 25 3.00 0.68 77 16 0 July 26 2.99 0.68 67 17 0 July 27 3.00 0.69 54 20 0 July 28 3.00 0.72 46 27 0 July 29 3.00 0.74 36 26 0 July 30 2.99 0.76 29 19 0 July 31 2.99 0.77 21 12 0 + -+ -+ -+ + - Aug. 1 3.00 0.75 16 9 0 Aug. 2 3.00 0.74 15 8 0 Aug. 3 3.00 0.74 16 7 0 Aug. 4 3.00 0.75 21 6 0 Aug. 5 3.00 0.76 29 8 0 Aug. 6 3.00 0.79 34 12 0 Aug. 7 2.99 1.01 21 12 0 Aug. 8 3.00 1.31 19 11 0 Aug. 9 2.98 1.44 16 9 0 Aug. 10 3.00 1.44 24 9 0 Aug. 11 3.00 1.49 62 22 0 Aug. 12 3.00 1.62 120 39 0 Aug. 13 2.97 2.06 107 22 0 Aug. 14 2.97 3.06 82 19 0 Aug. 15 2.81 3.91 65 15 0 Aug. 16 3.00 4.29 45 18 0 Aug. 17 3.00 3.86 35 22 0 Aug. 18 3.00 3.47 21 13 0 Aug. 19 3.00 3.49 18 10 0 Aug. 20 3.00 3.56 20 8 0 Aug. 21 3.00 3.58 20 10 0 Aug. 22 2.99 3.73 27 13 0 Aug. 23 3.00 4.00 49 34 0 Aug. 24 3.00 4.05 36 26 0 Aug. 25 2.98 4.06 34 24 0 Aug. 26 3.00 4.20 21 13 0 Aug. 27 3.00 4.31 19 11 0 Aug. 28 2.99 4.40 18 10 0 Aug. 29 3.01 4.41 17 9 0 Aug. 30 2.98 4.46 15 8 0 Aug. 31 Scraped. 13 ... ... 1.88 in. of sand removed. + -+ -+ -+ + - Sept. 5 3.00 0.10 34 4 0 Sept. 6 3.00 0.10 160 3 0 Sept. 7 3.00 0.09 64 3 0 Sept. 8 3.00 0.08 56 4 0 Sept. 9 3.00 0.08 59 3 0 Sept. 10 2.97 0.07 57 3 0 Sept. 11 2.98 0.07 65 2 0 Sept. 12 2.98 0.08 72 2 0 Sept. 13 3.00 0.08 87 3 0 Sept. 14 3.00 0.08 72 3 0 Sept. 15 3.00 0.08 65 3 0 Sept. 16 3.00 0.08 65 2 0 Sept. 17 3.00 0.08 52 2 0 Sept. 18 3.00 0.08 60 2 0 Sept. 19 2.98 0.08 85 2 0 Sept. 20 2.98 0.09 100 2 0 Sept. 21 2.99 0.09 120 3 0 Sept. 22 3.00 0.09 137 3 0 Sept. 23 3.02 0.09 112 4 0 Sept. 24 3.00 0.10 100 4 0 Sept. 25 3.00 0.11 432 3 0 Sept. 26 2.99 0.11 385 2 0 Sept. 27 3.00 0.12 245 4 0 Sept. 28 2.98 0.13 127 4 0 Sept. 29 2.98 0.14 105 4 0 Sept. 30 2.99 0.15 115 3 0 + -+ -+ -+ + - Oct. 1 3.00 0.15 82 3 0 Oct. 2 2.98 0.16 65 3 0 Oct. 3 3.00 0.17 59 2 0 Oct. 4 2.99 0.17 55 2 0 Oct. 5 2.99 0.19 59 2 0 Oct. 6 2.98 0.20 59 2 0 Oct. 7 2.98 0.21 52 2 0 Oct. 8 2.97 0.21 54 2 0 Oct. 9 2.98 0.22 51 2 0 Oct. 10 2.98 0.24 50 2 0 Oct. 11 2.98 0.25 47 2 0 Oct. 12 2.97 0.26 36 3 0 Oct. 13 2.98 0.27 40 4 0 Oct. 14 2.98 0.29 47 5 0 Oct. 15 2.99 0.31 41 5 0 Oct. 16 2.99 0.32 35 4 0 Oct. 17 2.98 0.34 30 4 0 Oct. 18 3.00 0.35 25 4 0 Oct. 19 3.00 0.35 25 4 0 Oct. 20 3.00 0.35 20 3 0 Oct. 21 3.00 0.35 19 3 0 Oct. 22 2.99 0.36 18 3 0 Oct. 23 2.99 0.37 15 3 0 Oct. 24 2.98 0.38 15 3 0 Oct. 25 2.99 0.39 15 3 0 Oct. 26 2.99 0.40 15 3 0 Oct. 27 2.99 0.41 13 2 0 Oct. 28 2.99 0.43 13 2 0 Oct. 29 2.98 0.44 25 2 0 Oct. 30 2.99 0.46 21 2 0 Oct. 31 2.96 0.48 25 3 0 + -+ -+ -+ + - Nov. 4 3.00 0.51 125 2 0 Nov. 5 3.00 0.53 185 2 0 Nov. 6 2.99 0.56 170 2 0 Nov. 7 2.99 0.60 100 3 0 Nov. 8 2.99 0.64 95 3 0 Nov. 9 2.99 0.70 80 4 0 Nov. 10 2.99 0.79 67 4 0 Nov. 11 2.99 1.00 52 6 0 Nov. 12 2.99 1.46 40 9 0 Nov. 13 2.98 2.09 36 10 0 Nov. 14 2.99 2.74 42 9 0 Nov. 15 2.99 2.98 35 8 0 Nov. 16 2.99 3.03 26 8 0 Nov. 17 3.00 3.07 20 6 0 Nov. 18 3.00 3.09 17 5 0 Nov. 20 2.99 3.17 45 3 0 Nov. 21 2.99 3.22 52 3 0 Nov. 22 2.99 3.27 65 5 0 Nov. 23 2.99 3.33 49 8 0 Nov. 24 2.99 3.41 134 11 0 Nov. 25 2.98 3.54 225 12 1 Nov. 26 2.98 3.68 237 13 1 Nov. 27 2.99 3.96 185 16 1 Nov. 28 2.98 4.29 130 18 1 Nov. 29 2.97 4.48 80 19 1 Nov. 30 2.97 4.54 54 15 1 + -+ -+ -+ + - Dec. 6 Scraped, 1.62 in. of sand removed. Dec. 8 2.97 0.16 12 3 0 Dec. 9 2.98 0.16 11 3 0 Dec. 10 2.98 0.15 12 3 0 Dec. 11 2.99 0.15 255 3 0 Dec. 12 3.00 0.13 212 2 0 Dec. 13 2.98 0.13 495 4 0 Dec. 14 2.99 0.14 357 5 0 Dec. 15 2.99 0.15 157 6 0 Dec. 16 2.98 0.16 90 9 0 Dec. 17 2.98 0.20 70 12 0 Dec. 18 2.98 0.24 49 12 1 Dec. 19 2.98 0.29 39 9 1 Dec. 20 2.98 0.36 42 7 1 Dec. 21 2.97 0.45 26 5 0 Dec. 22 2.98 0.57 20 4 0 Dec. 23 2.98 0.71 34 3 0 Dec. 24 2.98 0.83 195 2 0 Dec. 25 2.98 0.97 445 2 0 Dec. 26 2.98 1.11 370 2 0 Dec. 27 2.98 1.27 245 3 0 Dec. 28 2.98 1.40 102 4 0 Dec. 29 2.98 1.60 75 3 0 Dec. 30 2.97 1.85 56 3 0 Dec. 31 2.98 2.07 39 2 0 + -+ -+ -+ + - 1908. + -+ -+ -+ + - Jan. 1 2.99 2.11 31 2 0 Jan. 2 2.98 2.17 39 2 0 Jan. 3 2.98 2.26 36 2 0 Jan. 4 2.98 2.34 32 2 0 Jan. 5 2.98 2.41 26 2 0 Jan. 6 2.98 2.49 20 2 0 Jan. 7 2.98 2.58 20 2 0 Jan. 8 2.99 2.61 22 2 0 Jan. 9 2.99 2.63 45 2 0 Jan. 10 2.98 2.67 70 2 0 Jan. 11 2.98 2.72 56 2 0 Jan. 12 2.98 2.78 40 2 0 Jan. 13 2.98 2.84 110 2 0 Jan. 14 2.98 2.95 210 2 0 Jan. 15 2.98 3.07 325 3 0 Jan. 16 2.98 3.23 360 5 6 Jan. 17 2.97 3.73 242 6 0 Jan. 18 2.98 4.42 137 6 0 Jan. 19 2.99 4.75 117 5 0 Jan. 21 Scrape, 1.45 in. of sand removed. Jan. 23 3.00 0.14 40 3 0 Jan. 24 3.00 0.14 40 3 0 Jan. 25 3.00 0.13 39 3 0 Jan. 26 3.00 0.13 32 3 0 Jan. 27 3.00 0.13 32 2 0 Jan. 28 2.99 0.15 45 3 0 Jan. 29 2.99 0.20 69 6 1 Jan. 30 2.99 0.24 57 8 1 Jan. 31 2.99 0.30 42 6 1 + -+ -+ -+ + - Feb. 1 2.99 0.34 39 5 1 Feb. 2 2.99 0.41 27 4 1 Feb. 3 2.99 0.51 29 3 0 Feb. 4 2.99 0.56 25 3 0 Feb. 5 2.99 0.58 24 4 0 Feb. 6 2.99 0.61 20 6 0 Feb. 7 3.00 0.64 17 8 1 Feb. 8 2.99 0.66 15 8 1 Feb. 9 3.00 0.67 14 8 1 Feb. 10 2.99 0.67 11 8 1 Feb. 11 3.00 0.66 10 7 1 Feb. 12 3.01 0.64 8 6 1 Feb. 13 3.00 0.62 9 5 1 Feb. 14 3.00 0.61 9 5 1 Feb. 15 3.00 0.60 61 5 1 Feb. 16 3.00 0.60 80 6 1 Feb. 17 3.00 0.62 80 14 1 Feb. 18 2.99 0.67 130 20 1 Feb. 19 2.99 0.76 320 18 2 Feb. 20 2.99 0.83 177 15 2 Feb. 29 3.00 0.85 123 8 1 + -+ -+ -+ + - Mar. 1 3.00 0.87 97 9 1 Mar. 2 2.99 0.92 82 13 1 Mar. 3 2.98 0.96 87 19 1 Mar. 4 2.99 1.02 67 21 1 Mar. 5 2.99 1.08 59 25 1 Mar. 6 2.99 1.15 72 25 2 Mar. 7 2.98 1.21 82 25 2 Mar. 8 2.99 1.25 92 29 2 Mar. 9 2.99 1.30 125 34 2 Mar. 10 2.99 1.35 142 39 2 Mar. 11 2.99 1.39 155 35 2 Mar. 12 2.99 1.42 135 29 2 Mar. 13 2.99 1.46 122 19 2 Mar. 14 2.99 1.47 97 12 1 Mar. 15 2.99 1.48 77 8 1 Mar. 16 3.00 1.52 65 9 0 Mar. 17 2.99 1.66 59 7 0 Mar. 18 2.99 1.72 67 11 1 Mar. 19 2.99 1.75 60 24 1 Mar. 20 2.99 1.81 57 25 1 Mar. 21 2.99 1.89 67 22 1 Mar. 22 2.99 1.95 80 21 1 Mar. 23 3.00 2.00 90 26 1 Mar. 24 2.98 2.06 82 32 1 Mar. 25 2.99 2.17 67 39 1 Mar. 26 2.99 2.24 60 36 1 Mar. 27 2.99 2.29 59 30 1 Mar. 28 3.00 2.32 51 21 1 Mar. 29 2.99 2.35 31 18 1 Mar. 30 3.00 2.38 30 14 1 Mar. 31 2.99 2.43 39 9 1 + -+ -+ -+ + - Apr. 1 2.99 2.50 44 7 1 Apr. 2 2.99 2.58 42 8 1 Apr. 3 2.99 2.65 41 11 1 Apr. 4 2.99 2.74 54 12 1 Apr. 5 3.00 2.82 50 12 1 Apr. 6 2.99 2.88 41 14 1 Apr. 7 2.99 2.98 35 13 1 Apr. 8 2.98 3.15 39 11 1 Apr. 9 2.99 3.35 40 8 1 Apr. 10 2.98 3.50 40 8 1 Apr. 11 2.99 3.65 45 7 0 Apr. 12 2.99 3.79 52 5 0 Apr. 13 2.99 3.92 50 4 0 Apr. 14 2.99 4.05 45 4 0 Apr. 15 2.99 4.16 45 3 0 Apr. 16 ... 4.24 45 3 0 Apr. 21 Scraped, 0.12 in. of sand removed. Apr. 23 ... 0.13 25 2 0 Apr. 24 3.00 0.12 21 2 0 Apr. 25 3.00 0.10 20 2 0 Apr. 26 3.00 0.10 21 3 0 Apr. 27 3.00 0.10 18 3 0 Apr. 28 3.00 0.10 20 3 0 Apr. 29 3.00 0.09 24 3 0 Apr. 30 3.00 0.09 21 3 0 + -+ -+ -+ + - May 1 3.00 0.09 32 3 0 May 2 3.00 0.09 26 3 0 May 3 3.00 0.11 22 5 0 May 4 3.00 0.11 19 4 0 May 5 3.00 0.11 18 4 0 May 6 2.99 0.12 18 3 0 May 7 3.00 0.13 19 3 0 May 8 3.00 0.14 19 3 0 May 9 2.99 0.14 18 3 0 May 10 3.00 0.14 30 3 0 May 11 3.00 0.13 60 3 0 May 12 3.00 0.13 70 3 0 May 13 3.00 0.13 66 7 0 May 14 3.00 0.14 45 9 0 May 15 2.99 0.14 39 7 0 May 16 2.99 0.22 49 6 0 May 17 2.99 0.33 46 4 0 May 18 2.99 0.44 31 3 0 May 19 2.98 0.62 36 3 0 May 20 2.99 0.75 41 3 0 May 21 2.99 0.89 31 4 0 May 22 2.99 1.01 50 5 0 May 23 2.99 1.12 127 5 0 May 24 2.99 1.20 110 6 0 May 25 2.99 1.24 90 9 0 May 26 2.98 1.31 135 11 0 May 27 2.97 1.54 110 12 0 May 28 2.97 1.81 90 10 0 May 29 2.97 2.08 70 7 0 May 30 2.97 2.36 50 5 0 May 31 2.98 2.63 34 4 0 + -+ -+ -+ + - June 1 2.98 2.77 35 2 0 June 2 2.98 2.84 39 2 0 June 3 2.98 3.02 35 3 0 June 4 3.00 3.01 30 4 0 June 5 3.00 2.97 30 5 0 June 6 3.01 2.81 27 5 0 June 7 3.01 2.62 22 5 0 June 8 3.01 2.38 20 4 0 June 9 3.00 2.19 20 3 0 June 10 3.01 2.02 17 3 0 June 11 2.99 1.89 12 3 0 June 12 2.98 1.92 11 2 0 June 13 2.98 1.99 36 2 0 June 14 2.98 2.08 39 2 0 June 15 2.98 2.25 25 4 0 June 16 2.98 2.54 34 5 0 June 17 2.97 2.85 64 5 0 June 18 2.97 3.20 57 5 0 June 19 2.98 3.47 46 7 0 June 20 2.99 3.73 37 8 0 June 21 2.99 4.10 29 8 0 June 22 2.99 4.44 25 6 0 June 23 2.99 4.61 25 5 0 June 26 3.01 0.09 15 2 0 June 27 3.00 0.09 12 2 0 June 28 3.00 0.09 9 2 0 June 29 3.00 0.08 8 2 0 June 30 3.00 0.07 10 2 0 + -+ -+ -+ + - July 1 3.00 0.07 6 2 0 July 2 3.00 0.07 8 2 0 July 3 3.00 0.07 8 2 0 July 4 3.00 0.07 9 2 0 July 5 3.00 0.07 10 2 0 July 6 3.00 0.07 9 2 0 July 7 3.00 0.07 8 2 0 July 8 3.00 0.07 9 2 0 July 9 3.00 0.07 8 2 0 July 10 ... ... ... ... ... July 11 3.00 0.08 12 2 0 July 12 3.00 0.08 11 2 0 July 13 3.00 0.08 10 2 0 July 14 3.00 0.09 16 2 0 July 15 3.00 0.09 17 2 0 July 16 3.00 0.10 14 2 6 July 17 3.00 0.10 10 2 0 July 18 3.00 0.11 11 2 0 July 19 3.00 0.11 12 2 0 July 20 3.00 0.12 10 2 0 July 21 3.00 0.12 10 2 0 July 22 3.00 0.13 13 2 0 July 23 2.99 0.13 54 2 0 July 24 2.99 0.14 305 2 0 July 25 3.00 0.15 330 4 0 July 26 3.00 0.15 290 9 0 July 27 3.00 0.16 335 11 0 July 28 2.99 0.17 170 10 0 July 29 3.00 0.17 180 8 0 July 30 2.99 0.18 237 7 0 July 31 3.00 0.19 250 6 0 ========+=======+=======+=======+==========+=========

Table 19 (Continued.) ============================================== Bacteria. Coagulant. - - Date. Applied Effluent, Effluent, Grains, per water. coagulant. sand. gallon. - - 1907. - - Feb. 12 ... ... ... ... Feb. 13 600 ... ... ... Feb. 14 650 ... ... ... Feb. 15 600 ... 2,500 ... Feb. 16 850 ... 1,600 ... Feb. 17 ... ... ... ... Feb. 18 1,200 ... 300 ... Feb. 21 1,800 ... 550 ... Feb. 22 2 Holiday. Feb. 23 1,600 ... 1,100 ... Feb. 24 3 Sunday. Feb. 25 1,400 ... 600 ... Feb. 26 700 ... 650 ... Feb. 27 700 ... 2,300 ... Feb. 28 800 ... 550 ... - - Mar. 1 650 ... 300 ... Mar. 2 1,000 ... 270 ... Mar. 3 Sunday. Mar. 4 1,200 ... 140 1.45 Mar. 5 13,000 ... 190 1.94 Mar. 6 18,000 2,100 160 2.03 Mar. 7 24,000 3,500 160 1.50 Mar. 8 22,000 1,800 130 1.38 Mar. 9 24,000 3,500 130 1.37 Mar. 10 Sunday. 1.26 Mar. 11 18,000 6,000 120 1.24 Mar. 12 11,000 9,000 140 1.08 Mar. 13 9,000 5,000 120 0.94 Mar. 14 5,500 3,600 90 0 Mar. 15 6,500 3,800 85 0 Mar. 16 5,000 3,500 100 1.26 Mar. 17 Sunday. 1.52 Mar. 18 9,000 1,900 85 1.75 Mar. 19 7,000 700 65 1.57 Mar. 20 4,800 1,500 60 1.31 Mar. 21 8,500 1,500 70 1.38 Mar. 22 7,500 1,100 35 1.57 Mar. 23 7,500 470 55 1.68 Mar. 24 Sunday. 1.52 Mar. 25 Scraped, 1.03 in. of sand removed. Mar. 27 2,200 480 60 1.08 Mar. 28 1,300 250 80 1.00 Mar. 29 700 240 65 0 Mar. 30 {Shut down to fill coagulant basin. { 310 ... ... 0 Mar. 31 Sunday. 0 - - Apr. 1 600 1,000 43 0 Apr. 2 270 Lost. 35 0 Apr. 3 460 Apr. 41 0 Apr. 4 280 550 27 0 Apr. 5 450 1,000 60 0 Apr. 6 320 50 35 0 Apr. 7 Sunday. 0 Apr. 8 330 650 22 0 Apr. 9 140 750 21 0 Apr. 10 750 5,000 29 0 Apr. 11 4,000 550 25 1.11 Apr. 12 14,000 2,200 17 1.15 Apr. 13 13,000 3,900 25 1.14 Apr. 14 Sunday. 1.17 Apr. 15 7,060 2,200 19 1.09 Apr. 16 3,600 900 22 1.08 Apr. 17 1,600 1,100 12 0 Apr. 18 1,810 1,870 14 0 Apr. 19 790 910 14 0 Apr. 20 540 480 15 0 Apr. 21 Sunday. ... Apr. 22 235 420 21 0 Apr. 23 170 420 8 0 Apr. 24 150 250 17 0 Apr. 25 700 260 19 0 Apr. 26 1,200 320 80 0 Apr. 27 1,700 1,500 70 0 Apr. 28 Sunday. 0 Apr. 29 600 1,400 19 0 Apr. 30 550 1,200 14 0 - - May 1 500 1,300 20 0 May 2 500 850 16 0 May 3 280 650 34 0 May 4 400 550 24 0 May 5 Sunday. 0 May 6 390 460 80 0 May 7 190 ... 18 0 May 8 ... ... ... 0 May 9 390 1,100 14 0 May 10 300 500 21 0 May 11 390 650 16 0 May 12 Sunday. 0 May 13 600 470 27 0 May 14 500 550 25 0 May 15 500 900 23 0 May 16 290 2,500 25 0 May 17 260 2,000 16 0 May 18 190 600 19 0 May 19 Sunday. 0 May 20 260 450 15 0 May 21 260 330 14 0 May 22 280 390 22 0 May 23 130 240 19 0 May 24 170 240 30 0 May 25 340 400 41 0 May 26 Sunday. 0 May 27 Shut down to scrape sand filter; 1.09 in. of sand removed. Cleaning May 28 coagulant basin and treating coagulant basin with 1:2,000,000 May 29 solution of copper sulphate. May 30 Holiday. 0 May 31 380 18,000 150 0 - - June 1 900 7,000 150 0 June 2 Sunday. 0 June 3 550 8,000 130 0 June 4 6,500 7,500 140 0 June 5 3,200 3,600 110 0 June 6 1,500 800 60 1.17 June 7 2,100 1,500 90 1.18 June 8 660 1,000 60 0 June 9 Sunday. 0 June 10 240 400 32 0 June 11 280 300 31 0 June 12 330 ... 28 0 June 13 480 480 39 0 June 14 440 550 32 0 June 15 420 450 27 0 June 16 Sunday. 0 June 17 340 750 14 0 June 18 440 750 21 0 June 19 500 460 35 0 June 20 330 440 88 0 June 21 170 370 23 0 June 22 100 300 17 0 June 23 Sunday. 0 June 24 1,700 350 22 1.59 June 25 400 250 16 1.55 June 26 750 330 ... 0 June 27 ... 1,400 ... 0 June 28 ... 1,400 120 0 June 29 220 300 ... 0 June 30 Sunday. 0 - - July 1 400 600 85 0 July 2 180 1,000 50 0 July 3 350 310 21 0 July 4 Holiday. July 5 550 400 41 0 July 6 250 280 22 0 July 7 Sunday. 0 July 8 220 260 27 0 July 9 50 40 19 0 July 10 Lost. Lost. Lost. 0 July 11 150 50 8 1.27 July 12 300 200 13 1.27 July 13 220 160 17 1.27 July 14 Sunday. 1.27 July 15 375 150 1.27 July 16 Lost. 50 Lost. 1.36 July 17 270 60 3 1.26 July 18 1,675 70 1.17 July 19 450 700 11 0 July 20 300 720 8 0 July 21 Sunday. 0 July 22 1,400 560 14 1.17 July 23 3,700 490 40 1.25 July 24 770 110 80 1.27 July 25 250 80 5 1.22 July 26 140 40 4 0 July 27 300 130 21 0 July 28 Sunday. 0 July 29 470 290 100 0 July 30 Lost. Lost. Lost. 0 July 31 July July July 0 - - Aug. 1 Lost. Lost. Lost. 0 Aug. 2 130 140 4 0 Aug. 3 120 180 6 0 Aug. 4 Sunday. Aug. 5 230 100 44 0 Aug. 6 85 470 ... 0 Aug. 7 200 450 ... 0 Aug. 8 100 180 45 0 Aug. 9 75 80 16 0 Aug. 10 60 90 11 0 Aug. 11 Sunday. Aug. 12 620 260 16 1.45 Aug. 13 820 520 10 1.38 Aug. 14 850 120 26 1.22 Aug. 15 150 260 6 1.17 Aug. 16 270 340 17 0 Aug. 17 340 200 13 0 Aug. 18 Sunday. Aug. 19 180 220 17 0 Aug. 20 210 180 16 0 Aug. 21 1,300 650 8 0 Aug. 22 3,800 360 6 0 Aug. 23 2,500 700 10 0 Aug. 24 3,900 630 12 0 Aug. 25 Sunday. Aug. 26 700 310 16 0 Aug. 27 470 250 12 0 Aug. 28 500 160 18 0 Aug. 29 360 110 9 0 Aug. 30 320 310 14 0 Aug. 31 200 100 ... 0 - - Sept. 5 360 950 ... 1.04 Sept. 6 15,000 1,500 190 1.35 Sept. 7 2,000 260 100 1.20 Sept. 8 Sunday. ... 1.04 Sept. 9 220 180 38 1.04 Sept. 10 18,000 150 29 1.06 Sept. 11 2,700 200 37 1.04 Sept. 12 1,000 125 19 1.04 Sept. 13 2,300 200 72 1.20 Sept. 14 2,400 360 36 1.12 Sept. 15 Sunday. 1.04 Sept. 16 Lost. Lost. 38 1.04 Sept. 17 420 200 38 1.07 Sept. 18 900 200 17 1.07 Sept. 19 2,000 220 25 1.12 Sept. 20 4,200 320 31 1.24 Sept. 21 1,100 160 19 1.33 Sept. 22 Sunday. 1.45 Sept. 23 2,100 190 15 1.41 Sept. 24 4,000 620 13 1.33 Sept. 25 56,000 290 7 1.83 Sept. 26 1,300 950 19 2.34 Sept. 27 4,000 Lost. 20 1.91 Sept. 28 15,000 1,000 8 1.54 Sept. 29 Sunday. 1.34 Sept. 30 Lost. Lost. 46 1.35 - - Oct. 1 600 1,700 22 1.24 Oct. 2 4,400 550 8 1.09 Oct. 3 900 330 15 1.04 Oct. 4 850 250 11 1.03 Oct. 5 2,000 450 25 1.04 Oct. 6 Sunday. 1.04 Oct. 7 1,250 2,300 42 1.04 Oct. 8 11,000 100 15 1.04 Oct. 9 2,000 1,600 7 1.04 Oct. 10 800 Lost. 24 1.04 Oct. 11 2,000 1,200 21 0 Oct. 12 1,200 1,200 19 0 Oct. 13 Sunday. 0 Oct. 14 1,200 830 25 0 Oct. 15 900 Lost. 105 0 Oct. 16 Lost. 550 19 0 Oct. 17 550 800 21 0 Oct. 18 260 350 9 0 Oct. 19 750 310 35 0 Oct. 20 Sunday. 0 Oct. 21 480 540 35 0 Oct. 22 230 440 17 0 Oct. 23 250 440 39 0 Oct. 24 300 500 60 0 Oct. 25 450 410 65 0 Oct. 26 450 500 44 0 Oct. 27 Sunday. 0 Oct. 28 190 500 50 0 Oct. 29 380 60 75 0 Oct. 30 450 180 3 0 Oct. 31 2,300 390 75 0 - - Nov. 4 ... ... ... 0 Nov. 5 6,000 1,600 90 1.70 Nov. 6 5,000 3,900 6 1.70 Nov. 7 14,000 300 9 1.48 Nov. 8 1,900 230 2 1.27 Nov. 9 4,000 2,700 200 0 Nov. 10 Sunday. 0 Nov. 11 1,900 2,000 200 0 Nov. 12 7,500 2,300 160 0 Nov. 13 1,600 1,100 170 0 Nov. 14 2,700 950 130 0 Nov. 15 1,800 800 11 0 Nov. 16 1,100 800 90 0 Nov. 17 Sunday. 0 Nov. 18 1,600 700 100 0 Nov. 20 6,500 120 120 0 Nov. 21 9,900 1,000 80 0 Nov. 22 10,000 3, 200 90 0 Nov. 23 18,000 2, 400 100 0 Nov. 24 Sunday. 0 Nov. 25 50,000 2, 100 65 1.68 Nov. 26 40,000 2, 400 95 1.76 Nov. 27 16,000 2, 600 60 1.74 Nov. 28 Holiday. 1.57 Nov. 29 10,000 2, 500 65 1.50 Nov. 30 3,800 1, 900 85 0 - - Dec. 6 Scraped, 1.62 in. of sand removed. Dec. 8 Sunday. 1.17 Dec. 9 1,200 410 10 1.17 Dec. 10 800 550 150 1.17 Dec. 11 6,500 600 130 1.52 Dec. 12 48,000 500 130 1.99 Dec. 13 42,000 500 120 2.06 Dec. 14 49,000 750 150 2.12 Dec. 15 Sunday. 1.69 Dec. 16 19,000 900 20 1.28 Dec. 17 21,000 400 170 1.17 Dec. 18 6,500 7,000 350 1.17 Dec. 19 Lost. Lost. Lost. 1.17 Dec. 20 Dec. Dec. Dec. 1.17 Dec. 21 Dec. Dec. Dec. 1.17 Dec. 22 Sunday. 1.17 Dec. 23 1,400 1,300 220 1.17 Dec. 24 9,000 1,000 140 1.49 Dec. 25 Holiday. 2.43 Dec. 26 51,000 1,000 39 2.15 Dec. 27 55,000 1,600 70 1.91 Dec. 28 10,000 1,000 80 1.50 Dec. 29 Sunday. 1.21 Dec. 30 4,400 700 80 1.17 Dec. 31 14,000 1,200 65 1.17 - - 1908. - - Jan. 1 Holiday. 1.17 Jan. 2 4,400 700 19 1.17 Jan. 3 3,100 1,000 13 1.17 Jan. 4 2,400 550 19 1.17 Jan. 5 Sunday. 1.17 Jan. 6 600 230 18 1.17 Jan. 7 1,100 370 12 1.17 Jan. 8 1,900 1,100 20 1.17 Jan. 9 13,000 1,200 22 1.21 Jan. 10 10,000 700 16 1.17 Jan. 11 16,000 1,200 11 1.17 Jan. 12 Sunday. 1.17 Jan. 13 8,500 90 6 1.27 Jan. 14 16,000 150 23 1.56 Jan. 15 24,000 1,100 19 1.92 Jan. 16 28,000 1,000 14 2.10 Jan. 17 65,000 490 23 1.91 Jan. 18 7,000 1,600 14 1.66 Jan. 19 Sunday. 1.50 Jan. 21 Scrape, 1.45 in. of sand removed. Jan. 23 ... ... ... 1.17 Jan. 24 2,300 550 55 1.17 Jan. 25 1,100 850 95 0 Jan. 26 Sunday. 0 Jan. 27 300 280 60 0 Jan. 28 1,200 700 70 0 Jan. 29 1,000 900 75 0 Jan. 30 1,400 650 50 0 Jan. 31 1,100 600 36 0 - - Feb. 1 750 50 25 0 Feb. 2 Sunday. 0 Feb. 3 1,300 220 16 0 Feb. 4 600 370 10 0 Feb. 5 750 700 21 0 Feb. 6 2,000 650 4 0 Feb. 7 ... 410 26 0 Feb. 8 900 160 42 0 Feb. 9 Sunday. 0 Feb. 10 850 450 18 0 Feb. 11 1,000 600 26 0 Feb. 12 750 350 16 0 Feb. 13 700 120 10 0 Feb. 14 1,200 950 43 0 Feb. 15 5,500 1,000 23 0 Feb. 16 Sunday. 0 Feb. 17 33,000 6,100 36 0 Feb. 18 ... 2,000 11 0 Feb. 19 28,000 9,000 120 0 Feb. 20 22,000 8,500 190 0 Feb. 29 ... ... ... 0 - - Mar. 1 Sunday. 0 Mar. 2 8,000 4,400 50 0 Mar. 3 11,000 2,100 26 0 Mar. 4 6,000 4,700 7 0 Mar. 5 4,400 10,000 36 0 Mar. 6 7,000 7,400 50 0 Mar. 7 9,500 6,500 28 0 Mar. 8 Sunday. 0 Mar. 9 11,000 4,800 25 0 Mar. 10 8,500 1,200 23 0 Mar. 11 6,500 2,400 20 0 Mar. 12 5,900 1,500 11 0 Mar. 13 1,900 1,100 12 0 Mar. 14 1,800 700 6 0 Mar. 15 Sunday. 0 Mar. 16 1,400 700 8 0 Mar. 17 900 800 11 0 Mar. 18 1,000 650 8 0 Mar. 19 ... 600 18 0 Mar. 20 1,300 750 20 0 Mar. 21 800 480 18 0 Mar. 22 Sunday. 0 Mar. 23 4,600 440 19 0 Mar. 24 2,500 1,200 10 0 Mar. 25 1,600 650 20 0 Mar. 26 550 410 7 0 Mar. 27 900 900 29 0 Mar. 28 650 250 42 0 Mar. 29 Sunday. 0 Mar. 30 500 650 28 0 Mar. 31 750 290 30 0 - - Apr. 1 750 390 32 0 Apr. 2 1,100 280 47 0 Apr. 3 1,500 550 70 0 Apr. 4 700 380 4 0 Apr. 5 Sunday. 0 Apr. 6 440 150 4 0 Apr. 7 650 270 42 0 Apr. 8 550 210 65 0 Apr. 9 390 160 95 0 Apr. 10 500 130 130 0 Apr. 11 430 145 100 0 Apr. 12 Sunday. 0 Apr. 13 490 160 80 0 Apr. 14 550 170 90 0 Apr. 15 420 160 12 0 Apr. 16 360 130 90 0 Apr. 21 Scraped, 0.12 in. of sand removed. Apr. 23 140 140 ... 0 Apr. 24 200 Lost. 150 0 Apr. 25 85 550 45 0 Apr. 26 Sunday. 0 Apr. 27 95 850 50 0 Apr. 28 70 220 48 0 Apr. 29 110 210 95 0 Apr. 30 70 140 29 0 - - May 1 130 210 65 0 May 2 140 140 55 0 May 3 Sunday. 0 May 4 85 210 75 0 May 5 130 150 48 0 May 6 230 430 50 0 May 7 160 90 40 0 May 8 375 425 7 0 May 9 1,209 180 6 0 May 10 Sunday. 0 May 11 2,800 150 12 0 May 12 2,900 225 26 0 May 13 1,800 450 53 0 May 14 2,700 550 10 0 May 15 950 300 65 0 May 16 800 250 49 0 May 17 Sunday. 0 May 18 700 1,700 80 0 May 19 375 950 53 0 May 20 425 700 46 0 May 21 300 600 6 0 May 22 950 230 17 0 May 23 2,400 32 28 0 May 24 Sunday. 0 May 25 1,100 850 9 0 May 26 3,200 150 17 0 May 27 1,450 175 8 0 May 28 1,000 132 7 0 May 29 1,100 230 8 0 May 30 Holiday. 0 May 31 Sunday. 0 - - June 1 ... ... ... 0 June 2 ... ... ... 0 June 3 ... ... ... 0 June 4 ... ... ... 0 June 5 ... ... ... 0 June 6 ... ... ... 0 June 7 ... ... ... 0 June 8 ... ... ... 0 June 9 ... ... ... 0 June 10 ... ... ... 0 June 11 ... ... ... 0 June 12 ... ... ... 0 June 13 ... ... ... 0 June 14 ... ... ... 0 June 15 ... ... ... 0 June 16 ... ... ... 0 June 17 ... ... ... 0 June 18 ... ... ... 0 June 19 ... ... ... 0 June 20 ... ... ... 0 June 21 ... ... ... 0 June 22 ... ... ... 0 June 23 ... ... ... 0 June 26 ... ... ... 0 June 27 ... ... ... 0 June 28 ... ... ... 0 June 29 ... ... ... 0 June 30 ... ... ... 0 - - July 1 80 75 3 0 July 2 290 20 3 0 July 3 350 140 4 0 July 4 Holiday. 0 July 5 Sunday. 0 July 6 300 52 4 0 July 7 110 35 2 0 July 8 85 105 2 0 July 9 85 80 3 0 July 10 300 65 1 0 July 11 145 95 11 0 July 12 Sunday. 0 July 13 115 105 7 0 July 14 800 34 1 0 July 15 180 165 3 0 July 16 100 95 2 0 July 17 65 65 1 0 July 18 38 200 24 0 July 19 Sunday. 0 July 20 95 31 1 0 July 21 70 100 2 0 July 22 450 13 4 0 July 23 650 325 4 0 July 24 1,650 325 ... 0 July 25 2,600 55 2 0 July 26 Sunday. 0 July 27 35,000 1,200 6 0 July 28 1,200 675 6 0 July 29 2,000 270 11 0 July 30 800 190 2 0 July 31 1,000 310 6 0 ========================================

Table 20 Summary of Results of Experimental Filters. ==================================================== Filter number..... 1 2 3 4 5 6 Number of runs.... 3 6 11 12 25 28 - - Rate, million gallons per acre per day: Maximum....... 1.35 3.95 7.96 12.60 37.5 118.9 Minimum....... 0.62 2.30 3.73 5.77 6.68 7.1 Average....... 1.06 3.26 6.69 10.17 26.1 38.54 - - Length of run, in days: Maximum....... 233.5 150.5 75.2 90.9 48.71 39.83 Minimum....... 181.7 42.0 14.5 10.1 0.67 0.62 Average....... 206.4 109.6 48.89 40.5 14.41 12.61 - - Million gallons filtered per acre per run: Maximum....... 242.61 484.46 534.67 960.72 1,463.35 1,022.27 Minimum....... 202.60 135.66 93.79 92.57 19.53 53.32 Average....... 218.58 302.82 326.76 417.23 374.14 361.92 - - Cubic yards of sand removed per acre at end of each run: Maximum....... 269 269 672 1,612 2,420 3,360 Minimum....... 269 134 101 134 134 101 Average....... 269 213 272 392 583 635 - - Cubic yards of sand removed per acre per million gallons filtered........ 1.23 0.70 0.83 0.94 1.55 1.72 - - Average initial loss of head.... 0.07 0.19 0.51 0.78 3.88 5.38 - - Turbidity, influent: Maximum....... 120 120 120 120 90 100 Minimum....... 2 2 2 2 2 2 Average....... 20 20 21 22 18 19 - - Turbidity, effluent: Maximum....... 11 13 17 18 30 30 Minimum....... 0 0 0 0 0 0 Average....... 1 1 2 2 4 3 - - Percentage reduction 95.0 95.0 90.5 90.9 77.8 84.3 - - Bacteria, influent: Maximum....... 180,000 180,000 180,000 110,000 180,000 37,500 Minimum....... 22 20 22 20 25 24 Average....... 4,800 5,100 4,500 4,200 6,900 5,900 - - Bacteria, effluent: Maximum....... 4,000 1,300 3,200 5,400 12,800 2,400 Minimum....... 2 3 1 1 2 2 Average....... 160 85 110 120 190 180 - - Percentage, Reduction....... 96.7 98.3 97.6 97.3 97.3 97.0 - - Number of samples examined for bacillus coli in influent: 10 c.c........ 549 478 476 436 325 336 1 c.c........ 560 492 486 445 335 342 0.1 c.c...... 525 459 452 413 318 317 0.01 c.c..... 511 443 439 405 308 304 0.001 c.c.... 500 434 429 394 299 294 - - Number of samples examined for bacillus coli in effluent: 10 c.c........ 512 452 454 404 296 309 1 c.c........ 513 454 457 406 299 311 0.1 c.c...... 480 419 426 383 271 286 0.01 c.c..... 478 406 410 367 261 276 0.001 c.c.... 478 406 410 367 261 276 - - Number samples positive, influent: 10 c.c........ 226 211 201 258 136 152 1 c.c........ 127 123 116 108 81 93 0.1 c.c...... 55 59 54 51 43 42 0.01 c.c..... 26 34 33 33 27 25 0.001 c.c.... 6 6 5 6 3 3 - - Number samples positive, effluent: 10 c.c........ 100 109 134 98 94 106 1 c.c........ 51 61 55 56 46 50 0.1 c.c...... 9 13 16 16 4 13 0.01 c.c..... 0 0 0 0 0 0 0.001 c.c.... 0 0 0 0 0 0 - - Percentage of samples showing bacillus coli in influent: 10 c.c........ 41.2 44.2 42.2 59.2 41.9 45.2 1 c.c........ 22.7 25.0 23.9 24.3 24.2 27.2 0.1 c.c...... 10.5 12.8 11.9 12.3 13.5 13.2 0.01 c.c..... 5.1 7.7 7.5 8.2 8.8 8.2 0.001 c.c.... 1.2 1.4 1.2 1.5 1.0 1.0 - - Percentage of samples showing bacillus coli in effluent: 10 c.c........ 19.5 24.1 29.5 24.2 31.7 34.3 1 c.c........ 10.0 13.4 12.0 13.8 15.4 16.1 0.1 c.c...... 1.9 3.1 3.8 4.2 1.5 4.5 0.01 c.c..... 0 0 0 0 0 0 0.001 c.c.... 0 0 0 0 0 0 - - Cost per million gallons for sand handling..... $0.43 $0.25 $0.29 $0.33 $0.54 $0.60 - - Interest charges at 3%........... 6.85 2.25 1.12 0.73 0.32 0.22 - - Total......... 7.28 2.50 1.41 1.06 0.86 .82 ===================================================================== Coli tests presumptive.