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Toxics Use Reduction Institute · Surface Solutions Laboratory
 
Toxics Use Reduction Institute




Surface Solutions Laboratory

Trial Report



Trial Number 1

(Client Number 281, Project Number 1)

Trial Purpose: To evaluate product performance from collected samples from three locations.

Date Run: 08/09/07

Experiment Procedure:
Twelve samples from three locations (four from each) were emptied into 200 ml beakers and used at room temperature.
Thirty-six preweighed coupons were coated with a composite soil made from the filtration bags collected at the three sites. The contaminant mix was allowed to dry on the coupons for one hour. After this drying, a second weight was recorded to determine the amount of soil added. Three coupons were immersed into each sample and cleaned for 5 minutes using no agitation. At the end of the cleaning, coupons were rinsed for 15 seconds in tap water and dried using compressed air at room temperature. Once the coupons were dry, the final weights were recorded and efficiencies were calculated.

Trial Results
There were no major differences in the cleaning efficiencies for all the samples from each site. The second and third samples collected from Flahertys
were the only samples to have efficiencies lower than 99%. The table below lists the amount of soil added, the amount remaining and the efficiency for
each coupon cleaned.

Cleaner       Initial wt   Final wt  % Removed  Average Monthly Removal
Bergdales 1     1.6657     0.0021     99.87
                0.9887     0.0050     99.49        99.64
                2.0118     0.0092     99.54
Bergdales 2     1.6843     0.0035     99.79
                1.2647     0.0062     99.51        99.63
                1.7972     0.0075     99.58
Bergdales 3     2.2490     0.0054     99.76
                0.9844     0.0062     99.37        99.46
                0.9878     0.0075     99.24
Bergdales 4     2.7094     0.0020     99.93 
                2.5287     0.0028     99.89        99.92
                2.9671     0.0015     99.95
Flahertys 1     2.6645     0.0028     99.89 
                3.0010     0.0027     99.91        99.59
                0.9261     0.0096     98.96
Flahertys 2     1.8439     0.0041     99.78
                1.2544     0.1078     91.41        96.88
                2.1711     0.0118     99.46
Flahertys 3     1.3692     0.0080     99.42
                1.1305     0.0097     99.14        98.15
                0.8593     0.0353     95.89
Flahertys 4     1.5257     0.0037     99.76
                1.7370     0.0071     99.59        99.27
                1.1154     0.0170     98.48
Syversons 1     1.0805     0.0108     99.00
                0.9018     0.0070     99.22        99.02
                0.9830     0.0114     98.84
Syversons 2     1.0158     0.0071     99.30
                1.2075     0.0049     99.59        99.47
                1.1348     0.0056     99.51
Syversons 3     0.6597     0.0078     98.82
                1.6695     0.0027     99.84        99.43
                1.3224     0.0049     99.63
Syversons 4     1.0143     0.0073     99.28
                0.7560     0.0022     99.71        99.61
                1.3931     0.0023     99.83


Success Rating
A cleanliness study, addressing only various analytical techniques.

Conclusion
Cleaning effectiveness was determined to be nearly the same from sample to sample and from site to site. The four samples from Bergdales averaged 99.66% removal, the samples from Flahertys removed 98.47% and the four from Syversons resulted in 99.38% removed.