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OPERATING PROCEDURES - TM-10-4610-244-13_24
Table 2-2. Amount of 70% Calcium Hypochlorite (Ounces) in Five Gallons of Solution

TM-10-4610-244-13 Hypochlorination Unit NSN 4610-01-364-4485 Model AHY001 Manual
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TM 10-4610-244-13 TM 09476B-13/1 2-10.  OPERATING PROCEDURES (Cont'd). d. Chlorine residual test (1)   Rinse    test    tube    (1)    with sample  water.    Fill  to  line  with sample water. (2)   Add    one    DPD    tablet    (2) Install   cap   (3)   and   shake   test tube until tablet dissolves. (3)   Remove cap (3). (4)   Place test tube in reader (4) at  back  of  comparator  (5),  in  a slot directly behind clear window. (5)   Match sample color to color standard.      Move   sample   tube from  behind  one  clear  window to behind other until color match is made. (6)   If   color   is   darker   than   1.0 ppm Cl (2.0-10.0 ppm CI), place test sample tube in open windows (6) at top of comparator (5). (7)   Move sample tube from one position   to   another   until   color match  is  made.    If  color  of  test sample falls between two values,   the result is average of the two values.  Record as ppm Cl residual chlorine (8)   If   color   is   darker   than   5.0   ppm   Cl   color   standard,   amount   of   chlorine   present   cannot   be   measured accurately with one DPD tablet (2).  Add an additional DPD tablet to test tube (1), install cap (3) and shake until tablet dissolves.  Repeat step (6). (9)   Rinse test tube (1) with treated water and store in test kit. e. Determine  chlorine  dosage  requirement  by  subtracting  ppm  of  source  water  chlorine  residual  from  the  desired chlorine residual (as prescribed by TB-MED-577) For example Desired Chlorine Residual 3 ppm Source Water Chlorine Residual -1 ppm Chlorine Dosage Requirement 2 ppm f. If the chlorine dosage requirement is 2 ppm, for example, find a dosage ppm of 2 in2-11 table 2-2.  If the dosage requirement is 2 ppm and the hypochlorination unit will be run at 50 gpm, 7.5 ounces of 70% calcium hypochlorite will be mixed with 5 gallons of water 2-11







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