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| Water samples taken, before and after use by bathers, from
a Kocohani Holdings Infinity six person hot tub equipped with the above
sterilizer were analyzed for total and fecal coliforms and standard plate
counts. Bacterial levels were determined following methods given by the
Association of Official Analytical Chemists and Standard Methods for the
Examination of Water and Wastewater.
An initial sample was taken after the tub had been unused for
two days. A second sample was taken after 2.83 person hours (5 bathers for 35
minutes each) exposure to bathers. Follow up samples were then taken at 1, 6 and
23 hours after exposure to bathers.
The analytical results are shown in Table 1. All coliform organisms
were killed within 1 hour after bather exposure. Standard plate counts
were reduced to below pre-exposure levels within 6 hours after bather exposure.
Sincerely,
Western Water contacted BC Research Inc. to conduct a
bacteriostatic efficacy evaluation of the JP-1203-CTUV Water Purifier. The water
purifying unit consists of a 0.5 um carbon block filter and a UV lamp placed in
the center of the cartridge.
Dechlorinated Vancouver city tap water contaminated with raw
sewage at five levels (Tables 1 and 2) was passed through the purifier
at a rate of 50 ml/second. Samples taken before and after passing through the
purifier were analyzed for total and fecal coliform levels and standard plate
counts were determined following methods given in the Association of Official
Analytical Chemists and Standard Methods for the Examination of Water and Waste
Water.
The analytical results are as shown in Tables 1 and 2. The
product water meets or is better than the requirements set out in the Guidelines
for Canadian Drinking Water Quality, 1987, prepared by the Federal-Provincial
Advisory Committee on Environmental and Occupational Health. These guidelines require that Drinking water contain no more than 10 total coliform
organisms/100ml and that no fecal coliform organisms be detected. Standard plate
count must be less than 500 organisms/ml.
Sincerely, This filter is capable of traping and destroying 99.99% of parasites and bacteria.
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