(4) Do not proceed until hypochlorite pump has been adjusted as
described in steps above. Otherwise, water that is unfit to drink will be
delivered to the storage tanks.
16. Your operation is now at the stage where you are ready to direct
If you are using new RO elements,
continue to direct the product water to waste for at least 30 minutes to
flush out the preservative. Have the operator perform the following:
a. Observe the reading of the in-line TDS meter.
If the reading is
under 100 ppm, use the portable TDS meter to measure the TDS from the
combined sample valve.
b. Table 1-6 presents the maximum product water TDS as a percentage of
the water source TDS.
Use the portable TDS meter to measure the water
Maximum Product TDS as a Percent of Water Source TDS
Source TDS Sample - 25000 ppm at 95 degrees
Maximum TDS = 3.5 percent
25000 X 0.035 = 875 ppm
c. Have the soldier calculate the maximum product water TDS as shown in
If after 20 minutes the product water TDS has not dropped
below the calculated maximum, refer to RO elements troubleshooting.
d. Compare the actual measured product water TDS with the maximum TDS.
If less, proceed and direct the product water into the storage tanks by
inserting the product water hose in the middle tank and strapping it down.
Have the operator fill the 5 gallon plastic jug for use in the next start-
Set the 5 gallon jug filled with product water in the corner of the
17. Since water is being pumped into the product tanks, have an operator
check the product water for the proper chlorine