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Exhibit 3-24. Listing of Ion Exchange Applications Identified from the Users and Vendors Surveys

Number of Applications Identified During Surveys (1)


Application/Process Solution             Users Survey         Vendors Survey     

Recovery Applications:                                                           
Brass Plating, cyanide                          0                     1          
Copper Plating, not specified                   0                    40           
Copper Plating, acid                            0                     6          
Copper Plating, cyanide                         0                     1          
Copper Plating, electroless                     0                     2          
Chromium, Cr+3                                  0                     1           
Chromium, Cr+6                                  5                     6          
Cadmium, cyanide                                3                     0          
Gold, Cyanide                                   9                     0          
Gold, non-cyanide                               1                     0          
Lead Plating                                    0                    20           
Nickel Plating, not specified                   1                     1          
Nickel Plating, Watts                           9                     5          
Nickel Plating, sulfamate                       2                     0          
Nickel Plating, electroless                     1                     2          
Tin Plating                                     0                    10           
Tin-Lead Plating                                0                     2          
Zinc Plating, cyanide                           0                     0          
Zinc, non-cyanide                               3                     1          
Metal Scavenging, not specified                 0                    45           
Solution Pruification (2)                       9                    25           
Rinse Recirculation, no recovery (3)           10                    75           
End-of-Pipe Treatment, primary (3)              8                     0          
End-of-Pipe Treatment, polishing (3)            1                    21           

Notes:

(1) This exhibit compares the number of ion exchange applications identified during the Users and Vendors Surveys. The Users Survey data includes the responses from 300 plating shops. The Vendors Survey data includes responses from Kinetico Systems Engineering, Kinetic Recovery Corporation and Memtek Corporation.

(2) Details contained in Interim Report No. 4.

(3) Details contained in Interim Report No. 6.


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