| 
                 
                    Closing price on 4/29/2011
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    14.10 | 
                 
                
                    | High | 
                    14.10 | 
                 
                
                    | Low | 
                    14.10 | 
                     
                
                    | Volume | 
                    100 | 
                                 
                
                    | Split-adjusted Price | 
                    4.77 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
SCL Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                4/29/2011
             | 
            
                +0.60 / +4.44%
             |             
            
                14.10
             |           
            
                14.10
             |               
            
                14.10
             |                           
            
                14.10
             | 
            
                14.10
             |                     
            
                4.77
             |                                 
            
                100
             |            
            
                 
             |                                       
         
    
        
            | 
                4/28/2011
             | 
            
                +0.60 / +4.65%
             |             
            
                13.30
             |           
            
                13.50
             |               
            
                13.30
             |                           
            
                13.50
             | 
            
                13.46
             |                     
            
                4.57
             |                                 
            
                19,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/27/2011
             | 
            
                -0.90 / -6.52%
             |             
            
                12.60
             |           
            
                12.90
             |               
            
                12.60
             |                           
            
                12.90
             | 
            
                12.72
             |                     
            
                4.37
             |                                 
            
                3,900
             |            
            
                 
             |                                       
         
    
        
            | 
                4/26/2011
             | 
            
                +0.20 / +1.47%
             |             
            
                13.90
             |           
            
                14.00
             |               
            
                13.00
             |                           
            
                13.80
             | 
            
                13.54
             |                     
            
                4.67
             |                                 
            
                33,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/25/2011
             | 
            
                -0.90 / -6.21%
             |             
            
                14.10
             |           
            
                14.10
             |               
            
                13.60
             |                           
            
                13.60
             | 
            
                13.88
             |                     
            
                4.60
             |                                 
            
                5,700
             |            
            
                 
             |                                       
         
    
        
            | 
                4/22/2011
             | 
            
                -1.00 / -6.45%
             |             
            
                14.50
             |           
            
                14.50
             |               
            
                14.50
             |                           
            
                14.50
             | 
            
                14.50
             |                     
            
                4.91
             |                                 
            
                700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/21/2011
             | 
            
                -0.20 / -1.27%
             |             
            
                15.50
             |           
            
                15.50
             |               
            
                15.50
             |                           
            
                15.50
             | 
            
                15.50
             |                     
            
                5.25
             |                                 
            
                100
             |            
            
                 
             |                                       
         
    
        
            | 
                4/20/2011
             | 
            
                -1.10 / -6.55%
             |             
            
                15.70
             |           
            
                15.70
             |               
            
                15.70
             |                           
            
                15.70
             | 
            
                15.70
             |                     
            
                5.32
             |                                 
            
                4,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/19/2011
             | 
            
                -1.20 / -6.67%
             |             
            
                16.80
             |           
            
                16.80
             |               
            
                16.80
             |                           
            
                16.80
             | 
            
                16.80
             |                     
            
                5.69
             |                                 
            
                24,200
             |            
            
                 
             |                                       
         
    
        
            | 
                4/18/2011
             | 
            
                0.00 / 0.00%
             |             
            
                18.00
             |           
            
                18.00
             |               
            
                18.00
             |                           
            
                18.00
             | 
            
                18.00
             |                     
            
                6.09
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/15/2011
             | 
            
                0.00 / 0.00%
             |             
            
                18.00
             |           
            
                18.00
             |               
            
                18.00
             |                           
            
                18.00
             | 
            
                18.00
             |                     
            
                6.09
             |                                 
            
                0
             |            
            
                 
             |                                       
         
    
        
            | 
                4/14/2011
             | 
            
                0.00 / 0.00%
             |             
            
                18.00
             |           
            
                18.00
             |               
            
                18.00
             |                           
            
                18.00
             | 
            
                18.00
             |                     
            
                6.09
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/13/2011
             | 
            
                0.00 / 0.00%
             |             
            
                18.00
             |           
            
                18.00
             |               
            
                18.00
             |                           
            
                18.00
             | 
            
                18.00
             |                     
            
                6.09
             |                                 
            
                0
             |            
            
                 
             |                                       
         
    
        
            | 
                4/8/2011
             | 
            
                +0.30 / +1.69%
             |             
            
                18.00
             |           
            
                18.00
             |               
            
                18.00
             |                           
            
                18.00
             | 
            
                18.00
             |                     
            
                6.09
             |                                 
            
                1,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/7/2011
             | 
            
                -0.80 / -4.32%
             |             
            
                17.50
             |           
            
                17.70
             |               
            
                17.50
             |                           
            
                17.70
             | 
            
                17.52
             |                     
            
                5.99
             |                                 
            
                3,500
             |            
            
                 
             |                                       
         
    
        
            | 
                4/6/2011
             | 
            
                -1.10 / -5.61%
             |             
            
                18.50
             |           
            
                18.50
             |               
            
                18.50
             |                           
            
                18.50
             | 
            
                18.50
             |                     
            
                6.26
             |                                 
            
                2,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/5/2011
             | 
            
                0.00 / 0.00%
             |             
            
                19.60
             |           
            
                19.60
             |               
            
                19.60
             |                           
            
                19.60
             | 
            
                19.60
             |                     
            
                6.64
             |                                 
            
                100
             |            
            
                 
             |                                       
         
    
        
            | 
                4/4/2011
             | 
            
                0.00 / 0.00%
             |             
            
                19.60
             |           
            
                19.60
             |               
            
                19.60
             |                           
            
                19.60
             | 
            
                19.60
             |                     
            
                6.64
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/1/2011
             | 
            
                -0.60 / -2.97%
             |             
            
                19.60
             |           
            
                19.60
             |               
            
                19.60
             |                           
            
                19.60
             | 
            
                19.60
             |                     
            
                6.64
             |                                 
            
                0
             |            
            
                 
             |                                       
         
    
        
            | 
                3/31/2011
             | 
            
                -0.30 / -1.46%
             |             
            
                19.50
             |           
            
                20.20
             |               
            
                19.10
             |                           
            
                20.20
             | 
            
                19.58
             |                     
            
                6.84
             |                                 
            
                6,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/30/2011
             | 
            
                +1.50 / +7.89%
             |             
            
                20.50
             |           
            
                20.50
             |               
            
                20.50
             |                           
            
                20.50
             | 
            
                20.50
             |                     
            
                6.94
             |                                 
            
                0
             |            
            
                 
             |                                       
         
    
        
            | 
                3/29/2011
             | 
            
                -0.50 / -2.56%
             |             
            
                20.60
             |           
            
                20.60
             |               
            
                19.00
             |                           
            
                19.00
             | 
            
                20.54
             |                     
            
                6.43
             |                                 
            
                5,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/28/2011
             | 
            
                -0.90 / -4.41%
             |             
            
                19.50
             |           
            
                19.50
             |               
            
                19.50
             |                           
            
                19.50
             | 
            
                19.50
             |                     
            
                6.60
             |                                 
            
                100
             |            
            
                 
             |                                       
         
    
        
            | 
                3/25/2011
             | 
            
                +0.30 / +1.49%
             |             
            
                20.40
             |           
            
                20.40
             |               
            
                20.40
             |                           
            
                20.40
             | 
            
                20.40
             |                     
            
                6.91
             |                                 
            
                5,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/24/2011
             | 
            
                +0.10 / +0.50%
             |             
            
                20.00
             |           
            
                20.30
             |               
            
                19.10
             |                           
            
                20.10
             | 
            
                19.86
             |                     
            
                6.81
             |                                 
            
                15,300
             |            
            
                 
             |                                       
         
    
        
            | 
                3/23/2011
             | 
            
                -0.80 / -3.85%
             |             
            
                20.50
             |           
            
                20.50
             |               
            
                20.00
             |                           
            
                20.00
             | 
            
                20.31
             |                     
            
                6.77
             |                                 
            
                8,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/22/2011
             | 
            
                -0.60 / -2.80%
             |             
            
                20.10
             |           
            
                20.80
             |               
            
                20.10
             |                           
            
                20.80
             | 
            
                20.42
             |                     
            
                7.04
             |                                 
            
                50,000
             |            
            
                 
             |                                       
         
    
        
            | 
                3/21/2011
             | 
            
                +0.40 / +1.90%
             |             
            
                22.20
             |           
            
                22.20
             |               
            
                20.90
             |                           
            
                21.40
             | 
            
                21.30
             |                     
            
                7.25
             |                                 
            
                19,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/18/2011
             | 
            
                +0.50 / +2.44%
             |             
            
                20.90
             |           
            
                21.00
             |               
            
                20.00
             |                           
            
                21.00
             | 
            
                20.92
             |                     
            
                7.11
             |                                 
            
                13,600
             |            
            
                 
             |                                       
         
    
        
            | 
                3/17/2011
             | 
            
                +0.50 / +2.50%
             |             
            
                21.40
             |           
            
                21.40
             |               
            
                19.50
             |                           
            
                20.50
             | 
            
                20.95
             |                     
            
                6.94
             |                                 
            
                14,500
             |  
            
                 
             |                                                              
             
    
         
    
    
 |