Data Qualifier Codes 	Symbol Meaning 



A	Value reported is the mean of two or more determinations.
B 	Results based upon colony counts outside acceptable range. 
D	Test results are reported on samples without distillation. 
F	The value is questionable because of improper field sampling protocols.
I	Reported value is between the laboratory method detection limit and the laboratory practical 
       quantitation limit. The practical quantitation limit is 4 times the detection limit. 
J	Estimated value, value not accurate. 
       1. Surrogate recovery limits have been exceeded. 
2. No known quality control criteria exists for the Component. 
       3. The reported value failed to meet the established quality control criteria for either precision or  
  	    accuracy. 
       4. The sample matrix interfered with the ability to make any accurate determination. 
       5. The data is questionable because of improper lab or field protocols. 
       6. The Total measurement for a component is exceeded by a similar component. 
           The error limits for each measurement overlap. 

L 	Secchi disc visible to bottom of waterbody.

N 	This test is not NELAC certified by this laboratory. 
       1. Certification not requested/required by client. 
2. Certification not available through NELAC.
3. An E.P.A. Region IV variance is on file for the use of this method. 
O 	Sampled, but analysis lost or not performed. 
Q 	Sample held beyond holding time. 
T 	Value reported is less than the laboratory method detection limit. The value is reported for informational purposes only and shall not be used in statistical analysis. 
U 	Indicates that the compound was analyzed for but not detected. (Method Detection Limit) 
Y	The laboratory analysis was from an unpreserved or improperly preserved sample. 
Z 	Too many colonies were present (TNTC). 

!	Indicates that the reported value deviates from historic spatially established concentration ranges.