MWH maintains a comprehensive Quality Assurance and Quality Control Program. Our QA/QC policies and procedures aim to measure quality in terms of precision, accuracy, completeness, representativeness, comparability, timeliness and documentation across each and every area of the operation, and are based on having a stringent Quality System in place in accordance with National Environmental Laboratory Accreditation Program (NELAP). Key aspects of the program include proactive use of Quality Investigation Reports (QIRs) to identify and respond to potential problems with our quality system, internal data audits, and frequent proficiency testing (PT) with consistent high scores, including the use of Corrective Action Proficiency Testing (CAR) whenever a potential problem is identified in a PT sample. The program focuses on all aspects of the collection, analysis, and reporting process.
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Sample Collection and Handling procedures aim to sustain original sample integrity and mitigate matrix interferences from the time of collection until delivery to the laboratory.
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Sample Custody procedures aim to identify unusable samples (for analysis) and meticulously document sample acceptance and transport at login, storage, analysis and disposal.
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Sample Analysis procedures aim to maintain consistency in the application of methods for media/reagent preparation, extraction, analysis, detection limits, instrument calibration frequency and acceptance criteria, data reduction and reporting.
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Sample Data Integrity procedures aim to establish corrective action and response guidelines for addressing instrument failures and analytical results that do not meet the required standards.
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Sample Reporting procedures aim to produce analytical deliverables that meet or exceed project requirements as specific by Federal and State regulatory agencies.
Our comprehensive QA/QC Program is subject to annual on-site inspections and/or has been approved by many Federal and State Agencies, including the United States EPA, United States Air Force, California DHS (NELAC), Arizona DHS, and over 40 other state agencies and private entities. We strive to ensure that our MRLs are significantly below requirements wherever feasible to ensure that values reported are quantitative in nature rather than merely representing detects.
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