(1)
The manager shall ensure that:
(a) each pool
is continuously disinfected by a product that:
(i) is registered with the United States
Environmental Protection Agency as a disinfecting process or disinfectant
product for pool water;
(ii)
imparts a disinfectant residual that may be easily and accurately measured by a
field test procedure appropriate to the disinfectant in use;
(iii) is compatible for use with other
chemicals normally used in pool water treatment;
(iv) does not create an imminent health
hazard for bathers if applied according to manufacturer's specifications;
and
(v) does not create an imminent
health hazard if handled, stored, and used according to manufacturer's
directions;
(b) the
concentration of the active disinfectant within the pool water is consistent
with:
(i) the manufacturer's directions for
the disinfectant in use; and
(ii)
the minimum concentration listed in Table 3;
(c) the concentration of free available
chlorine is not above ten milligrams per liter while the facility is open to
bathers;
(d) products used to treat
or condition pool water are used according to the manufacturer's
directions;
(e) expired test kit
reagents are not used; and
(f) if
cyanuric acid or stabilized chlorine is used to stabilize the free chlorine
residual from the effects of UV light:
(i) a
test kit for cyanuric acid accurate to within 10.0 milligrams per liter is
provided; and
(ii) the
concentration of cyanuric acid in the water is:
(A) at least ten milligrams per liter;
and
(B) does not exceed 100
milligrams per liter;
(g) if the concentration of combined chlorine
residual is greater than 0.5 milligrams per liter the combined chlorine level
is reduced by:
(i) breakpoint chlorination, as
described in Subsection (15); or
(ii) a full or partial exchange of the pool
water with potable water; and
(h) the total alkalinity measurement is
within the range of:
(i) 100 to 125 milligrams
per liter for a pool lined with plaster;
(ii) 80 to 150 milligrams per liter for a spa
pool lined with plaster; and
(iii)
125 to 150 milligrams per liter for a pool lined with other approved
construction materials.
(2) The manager shall provide an easy to
operate, portable disinfectant test kit compatible with the disinfectant in use
and accurate to within 0.5 milligrams per liter at each facility.
(3) The manager shall calculate the
saturation index in accordance with Table 2 and ensure that the saturation
index value of the pool water is within the range of -0.3 and +0.3.
(4) The manager shall ensure that:
(a) the pool water has sufficient clarity to
easily see the drain grate or cover in the deepest part of the pool, or that a
black disk six inches in diameter on a white field is easily visible if placed
in the deepest part of the pool;
(b) the minimum water temperature for a pool
is 78 degrees Fahrenheit; and
(c)
the maximum water temperature for a pool is 104 degrees Fahrenheit.
(5) The local health officer may
grant an exemption to the pool water temperature requirements for a special
purpose pool including a cold plunge pool but may not exempt the water
temperature requirement listed in Subsection (4)(c).
(6) The manager or a representative of the
local health department, as determined by the local health officer, shall:
(a) collect a pool water sample from each
pool at least once per month or at a more frequent interval as determined by
the local health officer;
(b)
submit the collected pool water sample to a laboratory approved under Rule
R444-14, Certification of Environmental Laboratories, to perform total coliform
and heterotrophic plate count testing; and
(c) ensure that the collected sample is
analyzed in a laboratory for total coliform and heterotrophic plate count using
methods allowed under Section
R444-14-4.
(7) The individual who submits the collected
sample to the analyzing laboratory shall ensure that the laboratory provides
sample results within five working days to the local health department and the
manager.
(8) The local health
officer and manager shall review the sample results to determine if the pool
water has failed the bacteriological quality standard as determined by the
following sample failure criteria:
(a) the
sample contains more than 200 colony forming units (CFUs) per milliliter, as
determined by the heterotrophic plate count; or
(b) the sample indicates the presence of
coliform bacteria or contains more than one CFU of coliform bacteria per 100
milliliters.
(9) If the
local health officer determines that the sample fails as described in
Subsection (8), an additional sample shall be collected and submitted as
described in Subsection (6) within one laboratory receiving day after the
sample report was received.
(10) A
local health officer may exempt a pool from the requirement of monthly sampling
if:
(a) the pool is closed, whether
permanently or seasonally; or
(b)
the pool is temporarily closed for an interval exceeding half of a calendar
month.
(11) If the pool
water samples required in Subsection (6) fail bacteriological quality standards
as described in Subsection (8), the manager shall develop a corrective action
plan and submit the plan to the local health department for approval.
(12) If a more than one of five pool water
samples required in Subsection (6) fail bacteriological quality standards as
described in Subsection (8), the local health officer may require any of the
following:
(a) more frequent water
bacteriological sample collection;
(b) a health inspection;
(c) additional training for the pool
operator; or
(d) more frequent
water quality monitoring including:
(i)
disinfectant residuals, pH, and pool water temperature are checked and recorded
four times a day; and
(ii) flow
rate gauges and pool circulation rates are checked and recorded four times a
day.
(13) If
ORP technology is used in accordance with Subsection
R392-302-24(2),
the local health officer may reduce the water quality monitoring frequency
described in Subsection (12)(d)(i).
(14) The local health officer may limit peak
bather load as described in Section
R392-302-26, to ensure proper
pool water quality.
(15) The
manager shall calculate the dose of additional free available chlorine to add
to the pool to achieve breakpoint chlorination as follows:
(a) find the amount of combined chlorine in
the pool by:
(i) testing the pool water for
free available chlorine and total chlorine and subtracting the free available
chlorine from the total chlorine; or
(ii) testing the pool water for combined
chlorine;
(b) multiplying
the combined chlorine level by ten to find the amount of free available
chlorine to add to the water to achieve breakpoint chlorination.
|
TABLE 2
CHEMICAL VALUES AND FORMULA FOR
CALCULATING SATURATION INDEX
The formula for calculating the saturation index
is:
SI = pH + TF + CF + AF -- TDSF
SI means Saturation Index
TF means temperature factor
CF means calcium factor
mg/l means milligrams per liter
deg F means degrees Fahrenheit
AF means alkalinity factor
TDSF means total dissolved solids factor
|
|
Temperature in deg F
|
TF
|
Calcium Hardness in mg/l
|
CF
|
Total Alkalinity in mg/l
|
AF
|
|
32
|
0.0
|
25
|
1.0
|
25
|
1.4
|
|
37
|
0.1
|
50
|
1.3
|
50
|
1.7
|
|
46
|
0.2
|
75
|
1.5
|
75
|
1.9
|
|
52
|
0.3
|
100
|
1.6
|
100
|
2.0
|
|
I
|
0.4
|
125
|
1.7
|
125
|
2.1
|
|
66
|
0.5
|
150
|
1.8
|
150
|
2.2
|
|
76
|
0.6
|
200
|
1.9
|
200
|
2.3
|
|
84
|
0.7
|
250
|
2.0
|
250
|
2.4
|
|
94
|
0.8
|
300
|
2.1
|
300
|
2.5
|
|
105
|
0.9
|
400
|
2.2
|
400
|
2.6
|
|
128
|
1.0
|
800
|
2.5
|
800
|
2.9
|
|
Total Dissolved Solids in
mg/l
|
TDSF
|
|
0 to 999
|
12.1
|
|
1000 to 1999
|
12.2
|
|
2000 to 2999
|
12.3
|
|
3000 to 3999
|
12.4
|
|
4000 to 4999
|
12.5
|
|
5000 to 5999
|
12.55
|
|
6000 to 6999
|
12.6
|
|
7000 to 7999
|
12.65
|
|
Each additional 1000
|
Add 0.05
|
|
If the SATURATION INDEX is 0, the water is
chemically in
balance.
If the INDEX is a minus value, corrosive tendencies
are
indicated.
If the INDEX is a positive value, scale forming
tendencies are
indicated.
EXAMPLE: Assume the following factors:
pH 7.5; temperature 80 degrees F, 19 degrees C;
calcium
hardness 235; total alkalinity 100; and total
dissolved solids
999.
pH = 7.5
TF = 0.7
CF = 1.9
AF = 2.0
TDSF = 12.1
TOTAL: 7.5 + 0.7 + 1.9 + 2.0 - 12.1 = 0.0
This water is chemically balanced.
|
|
TABLE 3
DISINFECTANT LEVELS AND
CHEMICAL
PARAMETERS UNDER NORMAL
OPERATING
CONDITIONS
|
|
Stabilized Chlorine measured in milligrams per
liter see note 2
|
POOLS
|
SPA POOLS
|
SPECIAL
PURPOSE
POOLS
|
|
pH 7.2 to 7.6
|
2.0, see note 1
|
3.0, see note 1
|
2.0, see note 1
|
|
pH 7.7 to 8.0
|
3.0, see note 1
|
5.0, see note 1
|
3.0, see note 1
|
|
Non-Stabilized Chlorine measured in milligrams per
liter see note 2
|
|
|
|
|
pH 7.2 to 7.6
|
1.0, see note 1
|
2.0, see note 1
|
2.0, see note 1
|
|
pH 7.7 to 8.0
|
2.0, see note 1
|
3.0, see note 1
|
3.0, see note 1
|
|
Bromine measured in milligrams per liter
|
4.0, see note 1
|
4.0, see note 1
|
4.0, see note 1
|
|
Iodine measured in milligrams per liter
|
1.0, see note 1
|
1.0, see note 1
|
1.0, see note 1
|
|
pH
|
7.2 to 7.8
|
7.2 to 7.8
|
7.2 to 7.8
|
|
Cyanuric acid measured in milligrams per
liter
|
10 to 100
|
10 to 100
|
10 to 100
|
|
Minimum water temperature measured in degrees
Fahrenheit see Subsections
R392-302-25(4)(b)
and R392-302-25(5)
|
78
|
78
|
78
|
|
Maximum water temperature measured in degrees
Fahrenheit see Subsections
R392-302-25(4)(c)
and R392-302-25(5)
|
104
|
104
|
104
|
|
Calcium Hardness measured in milligrams per liter
as calcium carbonate
|
200, see note 1
|
200, see note 1
|
200, see note 1
|
|
Total Alkalinity Measured in milligrams per
liter
|
|
|
|
|
Plaster pools
|
100 to 125
|
80 to 150
|
100 to 125
|
|
Painted or Fiberglass pools
|
125 to 150
|
80 to 150
|
125 to 150
|
|
Saturation Index see Table 2
|
-0.3 to +0.3
|
-0.3 to +0.3
|
-0.3 to +0.3
|
|
Chloramines or combined chlorine residual measured
in milligrams per liter
|
0.5, see note 3
|
0.5, see note 3
|
0.5, see note 3
|
|
Note 1: Minimum value
Note 2: Maximum value of free chlorine is ten
milligrams per
liter as described in Subsection
R392-302-25(1)(c)
Note 3: Maximum value of chloramines or combined
chlorine
residual as described in Subsection
R392-302-25(1)(g)
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