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Abstract
EFFICACY STUDIES FINAL
PROGRESS REPORT
Submitted to Cal/EPA,
October 27, 1995
by
7C's Safety &
Environmental Consultants
SUMMARY
It has been shown that tap water
treated with Water PreserverTM
Concentrate (a blended
proprietary formula of 5.25%
Sodium hypochlorite solution),
stored in containers suitable
for long-term drinking water
storage, will remain potable for
up to 8 years. It has also been
shown that a quantity of water
can be stored for a minimum of
10 years total by re-treating
the water after 2-3 years.
Two continuous parallel Studies
(Study #1 and Study #2) were
performed on split samples of
water taken from one original
water sample.
In Study #1, potable domestic
tap water was treated with Water
PreserverTM. The
water was stored in a 55-gal.
drum for 29 months (2 years and
5 months) and then analyzed.
In Study #2, the water from
Study #1 (after analysis) was
transferred from the drum and
split into three individual 2.5
gal. WaterCubeTM
brand containers. Two of the
containers were treated with
Water PreserverTM at
the recommended rate of 8
drops/gal. and then stored. One
container was left untreated and
kept as a control sample. Split
samples were analyzed at 29, 37,
48, 63, 82, and 96 months.
RESULTS
Treated water stored in
food-grade drums and WaterCube™
containers described in Study #1
and #2, remained potable (met
current standards for healthful
drinking water) for the duration
of both Studies, as follows:
STUDY #1. Results of
bacteriological analysis showed
the stored water continued to
meet drinking water standards
after a 29-month storage period.
STUDY #2. Results of the
bacteriological analysis showed
the untreated control sample to
contain unacceptably high levels
of bacteria in the water.
However, the treated water met
drinking water standards at each
of six storage intervals, over
an 8-year storage period.
CONCLUSIONS
It was concluded that both of
the container types used in the
Studies are suitable for use
with Water PreserverTM
and as containers for the
long-term storage of water. In
addition, the "age" of the water
(i.e. water directly from the
tap vs. tap water that as has
been in storage for up to 29
months) is not a factor in the
effectiveness of the Water
PreserverTM
treatment.
Based on results of
bacteriological analysis from
Study #1 and Study #2, it was
concluded that Water PreserverTM
is effective in preparing
domestic (potable) tap water for
storage of up to 8 years, for
use as emergency drinking water
meeting all common drinking
water standards. Therefore,
current 5-year storage
recommendations on the product
label are validated and, in
fact, provide a 60% storage life
safety factor.
It has been shown that tap water
treated with Water PreserverTM
Concentrate (a blended
proprietary formula of 5.25%
Sodium hypochlorite solution),
stored in containers suitable
for long-term drinking water
storage, will remain potable for
up to 8 years. It has also been
shown that a quantity of water
can be stored for a minimum of
10 years total by re-treating
the water after 2-3 years.
Two continuous parallel Studies
(Study #1 and Study #2) were
performed on split samples of
water taken from one original
water sample.
In Study #1, potable domestic
tap water was treated with Water
PreserverTM. The
water was stored in a 55-gal.
drum for 29 months (2 years and
5 months) and then analyzed.
In Study #2, the water from
Study #1 (after analysis) was
transferred from the drum and
split into three individual 2.5
gal. WaterCubeTM
brand containers. Two of the
containers were treated with
Water PreserverTM at
the recommended rate of 8
drops/gal. and then stored. One
container was left untreated and
kept as a control sample. Split
samples were analyzed at 29, 37,
48, 63, 82, and 96 months.
RESULTS
Treated water stored in
food-grade drums and WaterCube™
containers described in Study #1
and #2, remained potable (met
current standards for healthful
drinking water) for the duration
of both Studies, as follows:
STUDY #1. Results of
bacteriological analysis showed
the stored water continued to
meet drinking water standards
after a 29-month storage period.
STUDY #2. Results of the
bacteriological analysis showed
the untreated control sample to
contain unacceptably high levels
of bacteria in the water.
However, the treated water met
drinking water standards at each
of six storage intervals, over
an 8-year storage period.
CONCLUSIONS
It was concluded that both of
the container types used in the
Studies are suitable for use
with Water PreserverTM
and as containers for the
long-term storage of water. In
addition, the "age" of the water
(i.e. water directly from the
tap vs. tap water that as has
been in storage for up to 29
months) is not a factor in the
effectiveness of the Water
PreserverTM
treatment.
Based on results of
bacteriological analysis from
Study #1 and Study #2, it was
concluded that Water PreserverTM
is effective in preparing
domestic (potable) tap water for
storage of up to 8 years, for
use as emergency drinking water
meeting all common drinking
water standards. Therefore,
current 5-year storage
recommendations on the product
label are validated and, in
fact, provide a 60% storage life
safety factor. |
