followed by NOAA for chemical analysis of aquatic environmental 

 samples. 



TABLE 5. Approximate Range of Cost per Sample for Analyses 



of EPA Priority Pollutants in Tissues as a Function of Detection 



Limits and Precision^ 



NOTE: Range of per sample cost is based on multiple quotes compiled for specific 

 applications and 5 samples. The actual costs may vary from the range shown. This 

 information is provided solely for perspective on relative differences in cost and should 

 not be interpreted as a recommendation of appropriate costs for any given cir- 

 cumstance. 



Each cost range is mainly the result of laboratory differences in technique and 

 pricing, NOT the range in precision or detection limits shown. 



A QA/QC plan should be developed as part of the study design for 

 sampling and analysis of chemical residues. The QA/QC plan should 

 include the following information: 



• Project objectives 



• Project organization and personnel 



• QA objectives for precision, accuracy, and completeness for 

 each kind of measurement 



• Summary of sampling procedures, including sample con- 

 tainers, preparation, and preservation 



• Forms for documenting sample custody, station locations, 

 sample chziracteristics, sample analysis request, and sample 

 tracking during laboratory analysis 



• Detailed description of analytical methods 



• Calibration procedures for chemical measurements 



• Internal QC checks for analytical laboratories 



• Performance and system audits for sampling and analysis 

 operations 



• Preventive maintenance for equipment 



• Procedures for data management, data QA review, and data 

 reporting for each kind of measurement 



• Corrective actions 



49 



