Precise and accurate results are fundamental at CCAL. Our Quality Assurance Program is designed to conform with EPA surface water chemistry criteria, and is a continuous process that monitors every analysis and procedure performed in the laboratory. CCAL participates in the USGS Standard Reference Water Survey Program, an external interlaboratory QA Program, to monitor accuracy of analytical procedures. The CCAL Quality Assurance Plan (QAP) describes protocols and procedures used in the Laboratory.