WS-2637_6113_CA_WSW_20230503_Clapp

May 3, 2023

Rev. Timothy Boone
Clapp’s Chapel AME Church
P.O. Box 98
Whitsett, NC 27377

Re: Health Risk Evaluation of Water Supply
Tracking ID: Truckstops of America, Incident #6113

Dear Rev. Boone:

Please find attached the Sample Analytical Results for water supply well samples collected from the church
well, identified as Clapp, located at 1305 Piney Grove Road, Whitsett, Guilford County, on August 19,
2022. The samples were collected and analyzed as part of the investigation of a petroleum release in the
vicinity. The water samples were analyzed for specific target analytes (contaminants), which are listed on
the attached Sample Analytical Results. A contaminant was detected in the pre-treatment/influent water
sample, as shown on the attached Sample Analytical Results.

The water supply well at this property is treated by a Point-of-Entry (POE) treatment system to remove
contaminants. Water samples were taken at three points on the system. Because a contaminant was detected
in the influent water sample, a Health Risk Evaluation of the water supply was performed by an
environmental toxicologist in the Division of Waste Management. The Health Risk Evaluation, which is
also attached, compares the detected concentration of the contaminant to the acceptable concentration and
provides a recommendation for safe use of the water.

No contaminants were detected in the mid-treatment or post-treatment/effluent samples; therefore, the POE
system is effectively removing contaminants from the water supply well.

If you have any questions, please contact Dave Lilley at [phone] or contact Ashley Dinkins at (336)
641-5557 or at the Guilford County Department of Health and Human Services office located at 400 W.
Market Street, Suite 300, Greensboro, NC 27401.

Sincerely,

James Brown
Regional Supervisor
Winston-Salem Regional Office
UST Section, Division of Waste Management, NCDEQ

Attachment: Clapp-INF, Clapp-MID, Clapp-EFF Sample Analytical Results
Health Risk Evaluation

May 1, 2023 TO: Ashley Dinkins
Guilford County Department of Health and Human Services for Winston-Salem
Regional Office NC UST Section RE: Health Risk Evaluation
Incident # 6113
Clapps Chapel Well Sampling Results (INF) 1305 Piney Grove Road Whitsett, NC
During this sampling event, one contaminant was detected in the well water. The standards used
to determine if the water is suitable for drinking and cooking are the United States Environmental Protection Agency’s Maximum Contaminant Levels (MCLs) or, if no MCLs exist, North Carolina Groundwater Standards (2L).
If the contaminant concentration exceeds the applicable standard for using the water for drinking
and cooking, the contaminant concentration is further analyzed to determine if the water is suitable for other household uses, such as showering, bathing, washing dishes, flushing toilets, and hand washing. The chart below compares the detected contaminant concentration with the applicable standard: Sample ID Contaminant Concentration (µg/L) MCL (µg/L) 2L (µg/L)
400-224781-10 Methyl tert-butyl ether 1.46 20
µg/L – Stands for micrograms of contaminant per liter of water and is roughly equivalent to parts per billion. RECOMMENDATION: The detected contaminant did not exceed the applicable water standard.
Therefore, no restrictions on the use of this water are recommended at this time.
David Lilley, Environmental Toxicologist
Division of Waste Management, NCDEQ
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   
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    








 
     
   
    
    
    
    
    
    
    
    
    
    
    
   
  
   
   








 
     
   
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    








 
     
   
    
    
    
    
    
    
    
    
    
    
    
   
  
   
   








 
     
   
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    








 
     
   
    
    
    
    
    
    
    
    
    
    
    
   
  
   
   






   
  
  


   
   










 

 
     
 
  
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    






 

 
     
 
  
    
    
    
    
    
    
    
    
    
    
    
    
   
 
   
  
  

 

    

 
  




     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     






 

    

 
  




     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
 


 
 
 
 

 

     

 
  














 

     

 
  
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






      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      






 

     

 
  
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
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
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
      
      
      
      
      
      
      
      
      



 
 
 
 

 

        

 
  







 

        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        






 

      

 
  







 

        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
 


 
 
 
 

 

 
     
 
  
    
    
    






 

 
     
 
  
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    






 

 
     
 
  
    
    
    
    
    
    
    
   
 
   
  
  

 

     

 
  




     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     






 

    

 
  




     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     



 
 
 
 

 

      

 
  








      
      
      
      
      






 

     

 
  








      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      






 

     

 
  








      
      
      
      
 


 
 
 
 

 

        

 
  







 

        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        






 

      

 
  







 

        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
 


 
 
 
 


 
 
 
      
 
  
     
     
     
     
     
     
     






 
 
 
      
 
  
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     

     
     
     
     






 
 
 
      
 
  
     
     
     
     
     
    
 


  
    
    
   
   
   

 
 
     

 
  




     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     






 
 
    

 
  




     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     


    
     
     
     
     
     
     
     
     
     
     
 


 
 
 
 
 
 
 






 
 
       

 
  



 

       
       
       
       
       
       
       
       
       
       
       
       
       
       
       
       
       
       
       
       
       
       
       
       
       
       
       
       
       
       
       
       
       
       
       
       
       
       
       
       
       
       
       
       
       
       
       






 
 
     

 
  



 

       
       


      
       
       
       
       
       
       
       
       
       
       
 


 
 
 
  
 
 
 


 

 
     
 
  
    
    
    
 
   
   

 

    

 
  




     
     






 




 
 
 

 

     

 
  



 

       
       



 
 
 

 

      

 
  








      
      
 


 
 
 

 

      

 
  







 

        
        



 
 
 

 

 
     
 
  






 

 
     
 
  
    
   
 
   
  

 

    

 
  




     
     



 
 
 

 

       

 
  



 

       
       
 


 
 
 

 

     

 
  








      
      



 
 
 






 

        

 
  







 

        
        
 


 
 
 


 
 
 
      
 
  
     
    
 


  

 
 
    

 
  




     



 
 

 
 
       

 
  



 

       
 


 
 
