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




Surface Solutions Laboratory

Trial Report



Trial Number 3

(Client Number 281, Project Number 1)

Trial Purpose: To evaluate cleaning performance of samples taken after 6 months of use.

Date Run: 10/17/07

Experiment Procedure:
Six samples from three locations (two from each) were emptied into 400 ml beakers and used at requested temperature for cleaning. In addition, an unused cleaning product was included for comparison.

Twenty-one 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 sample collected from Flahertys was the
only samples to have efficiencies lower than 98%. 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 Removal
Bergdales 6-1  0.4489      0.0108     97.59
               0.8501      0.0129     98.48         98.42
               0.9977      0.0081     99.19
Bergdales 6-2  1.0125      0.0083     99.18
               0.6349      0.0122     98.08         98.11
               0.4262      0.0125     97.07
Flahertys 6-1  0.6779      0.0091     98.66
               1.2229      0.0069     99.44         98.90
               0.7464      0.0105     98.59
Flahertys 6-2  0.4225      0.0208     95.08
               0.3789      0.0148     96.09         96.79
               0.9618      0.0077     99.20
Syversons 6-1  0.7991      0.0083     98.96
               0.8121      0.0199     97.55         98.34
               0.9886      0.0147     98.51
Syversons 6-2  0.6100      0.0206     96.62
               0.6814      0.0065     99.05         98.33
               1.0462      0.0071     99.32
Unused Cleaner 1.0989      0.0097     99.12
               1.0689      0.0113     98.94         98.85
               0.8155      0.0123     98.49


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

Conclusion
Cleaning performances were consistent for all three locations and the fresh cleaning product.