Quality Assurance

The primary objective of our Quality System is data reliability. This objective is achieved by maximizing the precision and accuracy of analytical results and ensuring that all laboratory operations are in compliance with applicable quality standards. All work is conducted under a comprehensive Quality Management Plan that maintains compliance with applicable standards of ISO 17025 (General Requirements for the Competence of Testing and Calibration Laboratories).

ASL participates in several performance evaluation (PE) programs:

• North American Proficiency Testing Program for soil and plant analyses
• NAPT-Performance Assessment Program for compliance with NRCS State 590 NMP Standards
• National Blood Lead Proficiency Testing Program (Wisconsin State Laboratory of Hygiene)

ASL's quality system includes the following elements:

• The consistent use of management-approved standard operating procedures for all laboratory operations, including personnel training, sample handling, analytical procedures, reagent preparation, documentation and equipment operation and maintenance.
• Quality control samples, such as blanks, blank spikes, duplicates and reference materials, are run with each analytical batch to ensure accuracy and precision. Whenever the analysis type permits, certified reference materials that are traceable to a national standards agency, such as the National Institute of Standards and Technology (NIST), are analyzed.
• Each analytical batch receives supervisory and peer review for acceptance.
• Periodic laboratory audits by the Quality Assurance Unit to determine laboratory adherence to project protocols and the Laboratory Quality Management Plan. 
• Participation in outside agency performance evaluation programs and analysis of check samples.