Sample Analysis Quality Plan (SAQP)
Summary
A Sample Analysis Quality Plan (SAQP) is a document that sets out the quality assurance and quality control procedures used to ensure environmental sample data is reliable, representative and suitable for decision-making. The SAQP defines how samples will be collected, handled, analysed and assessed to manage data uncertainty.
Definition
A Sample Analysis Quality Plan is a structured plan that describes the quality objectives, analytical methods and data assessment procedures to be applied to environmental sampling and laboratory analysis.
The SAQP typically addresses sampling design, laboratory accreditation, detection limits, QA/QC measures and data validation processes to demonstrate that analytical results are fit for purpose.
Why Sample Analysis Quality Plans Matter
From a technical perspective, environmental decisions are only as sound as the data they rely on. An SAQP ensures that sampling and analysis are undertaken at a level of quality appropriate to the site risk and project objectives.
From a regulatory perspective, councils, regulators and site auditors rely on SAQPs to understand whether investigation and validation data can be relied upon. Poor data quality or undocumented QA/QC can undermine an entire assessment, regardless of the volume of sampling undertaken.
From a project delivery perspective, a clear SAQP reduces the risk of re-sampling, disputes or delays caused by data that does not meet acceptance criteria.
Typical Elements of a SAQP
A Sample Analysis Quality Plan typically includes:
Data quality objectives and intended data use
Sampling design and representativeness considerations
Laboratory selection and accreditation requirements
Analytical methods and reporting limits
Quality assurance and quality control procedures
Data validation and review processes
Criteria for acceptance or rejection of results
The level of detail is proportionate to site risk and project complexity.
When a SAQP Is Typically Required
A SAQP is commonly required where:
Contaminated land investigations are undertaken
Detailed Site Investigations involve laboratory analysis
Validation sampling is required following remediation
Regulatory or auditor review is anticipated
High-risk contaminants or low detection limits are involved
SAQPs may be standalone documents or incorporated into investigation plans or reports.
Legislative and Regulatory Context
Sample Analysis Quality Plans form part of accepted contaminated land and environmental assessment practice.
In New South Wales, SAQPs are commonly referenced in EPA guidance and are expected for investigations where data quality is critical to land-use decisions. Regulators and auditors expect SAQPs to demonstrate that analytical data is defensible and fit for purpose.
How We Can Help
Confluence Environmental prepares and applies Sample Analysis Quality Plans across contaminated land, remediation and validation projects.
Our services typically include:
Development of site-specific SAQPs
Alignment of sampling and analysis with investigation objectives
Review of laboratory methods and QA/QC procedures
Data quality review and validation
Clear documentation to support regulatory and auditor review
We focus on SAQPs that are practical, proportionate and aligned with project risk.
Related Terms and Concepts
Sampling and Analysis Plan
Chain of Custody
Quality Assurance / Quality Control (QA/QC)
Preliminary Site Investigation
Detailed Site Investigation
Site Validation
Conceptual Site Model