March 13, 1990

AQUA SUN INC. PURA WATER PURIFICATION SYSTEM, TEST RESULTS

PROTOCOL

Test was conducted under the direction of Ford Chemical (an epa approved lab in Salt Lake City, Utah ) and samples were sent to Ford Chemicals for analysis. Equipment was sterilized before each test run as recommended by Ford. The water was prepared by drawing water from stagnant ponds in horse pastures and then incubated for 24 or more hours. The goal was to challenge the equipment with unknown bacteria rather than strictly with E coli which is killed with a lower UV dosage than most bacteria require. The challenge water most likely contained with a wide variety of micro-organisms and would be more representative of real life conditions. All analysis was done using standard plate counts (SPC) which will reveal any living micro-organisms.

The samples were sent to Ford in care of the Utah County Health Department to ensure proper handling procedures. All sample bottles were numbered with conditions of each numbered sample recorded. Ford Chemical then returned the results of each numbered sample. The data below represents the results found by Ford and the conditions under which each sample was drawn.

Standard Plate Counts that were less than 1 are shown as 0.001 in the data below.

Bacteriological Analyses Results

SAMPLE ID: Single unit (UF/20 l) with dip tube insert.

CERTIFICATE OF ANALYSIS

The unit was tested at flow rates (outlet) of 5 gallons/minute, 8 gallons/minute and 10 gallons/minute using water drawn from a pond in a horse pasture. The unit was sterilized with chlorine between each run to avoid carry-over contamination.

• Test Model UVB1 GC: Rated Flow: 1
• Bacteria count input: 4800O SPC Date of Test 12/15/88
• Actual Flow: 1 GPM Count Out 0.001 Percent Kill 99.9999
• Actual Flow: 2 GPM Count Out 27.00 Percent Kill 99.9437
• Actual Flow: 3 GPM Count Out 34.00 Percent Kill 99.9291

• Test Model: UVCCL1 CBC-10: Rated Flow: 2
• Bacteria count input: 48000 SPC Date of Test 12/15/84
• Actual Flow: 1 GPM Count Out O.001 Percent Kill 99.9999
• Actual Flow: 2 GPM Count Out O.001 Percent Kill 99.9999
• Actual Flow: 3 GPM Count Out 0.001 Percent Kill 99.9999

• Run B - 8 gallon /minute: Reduction Percent = 99.989
• Original Count = 19,000
• Actual Count = 2

• Run C - 10 gallon /minute: Reduction Percent = 99.989
• Original Count = 19,000
• Actual Count = 2

I verify that the above information is true and accurate to the best of my knowledge.

-------- ------------*, Chemtech

Note: Several improvements have been made on the models since these tests were run that improve the UV intensity and will therefore increase the kill rate.

*Name removed by Aqua Sun International for privacy reasons

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