Calculators - Disinfection of Pipelines and Storage Facilities Field Guide - page 125

Storage Facility Chlorinate and Fill Method Calculator
The approximate amount of chlorination chemical needed for
50 mg/L chlorine concentration for a given size tank, 5% volume,
is calculated as follows (use either US or SI units):

(c5-6)

1 2 3 4

Amount
of
chemical
needed

Volume
(from tank
shape
equations
×

Amount
of
chemical
(from
Table 5-5)

Chemical
strength
factor =
strength in
table/strength
of chemical
selected

Volume
(from
Table 5-5;
100,000
for US
units and
100 for SI
units)

× × =

÷

0.05)

Dechlorination Chemical Calculator

(c7-1)

1 2 3 4

Total
amount
of
chemical
needed

Volume of
water to be
dechlorinated
(from Tables
3-5 and 5-1,
and calculators
5-1, 5-2, 5-3,
and 5-4)

Amount
of
chemical
(from
Table 7-5)

Chlorine
residual,
mg/L

Volume
(from
Table 7-5;
either
100,000
gal or
100 m 3 )

× × =

÷

Dechlorination Continuous Solution Feed
Chemical Calculator
gal/hr = gal/min

× mgC/L × mgD/mgC × 60 min/hr ÷

(% strength 10,000 mg/L/%)*

*mgC is the milligrams of chlorine and mgD is the milligrams of dechlo-
rination chemical

×

(c7-2)

Dechlori-
nation
chemical
feed rate
(gph)

Chlorinated
water flow
rate (gpm)
(withdrawal
or fill)

Chlorine
residual
(mg/L)

Dechlori-
nation
chemical
dosage
(Table 7-2)

Strength of
dechlori-
nation
chemical
solution (%)

= 0.006 × × × ÷