Document ID: chunk:federal_register_of_legislation:F2013C00288:reg:1850:p7
Version: federal_register_of_legislation:F2013C00288
Segment Type: reg
Provision Reference: reg 1850 (pt 7/117)
Character Range: 364522–367512

achieve the DQOs
    * procedures to follow if the data does not meet the specified DQOs.
The development of the DQOs should be guided by identification of critical data gaps in the CSM. The objectives for sampling may include:
    * determining the nature and extent of contamination
    * delineating  the lateral and vertical extent of contamination
    * developing an understanding of the geology and hydrogeology
    * the identification of potential and actual contaminant migration routes
    * determining whether relevant investigation and/or screening levels are exceeded
    * determining whether further investigation or management is required.
Subsequent objectives may be to determine whether relevant investigation levels are exceeded and whether further action is required (additional investigation or management of some form). As understanding of the site will evolve over time, the iterative development of the CSM may also have implications for the DQOs and the SAQP. Data quality assessment (refer Sections 5.6 and 13.1) is also an important part of this iterative process.

A summary of the DQO process is included in Appendix B. More detailed information can be found in US EPA (2000a, 2000b and 2006a). ODEQ (2010) provides a detailed case study of the DQO process applied to a benzene and TCE spill.

5.3              Sampling and analysis quality plans
A well-developed sampling and analysis quality plan (SAQP) has a critical role in ensuring that the data collected is representative and provides a robust basis for site assessment decisions. In order to meet this objective, an SAQP will generally include the following:
    * site investigation objectives and a brief background including appropriate plans and diagrams
    * a summary of the CSM
    * a review of existing information indicating reliability and usability of any existing data (data gap analysis)
    * DQOs including a quality assurance (QA) plan and details of quality control (QC) samples to be collected
    * pre-mobilisation tasks (e.g. preparation of a site-specific health and safety plan)
    * media to be sampled (soil, sediment, groundwater, vapour, NAPL (non-aqueous-phase  liquids), biota, surface water, deposited dusts, indoor air, outdoor air)
    * details of analytes and parameters to be monitored
    * number, location (coordinates) and depth (elevation AHD) of sampling points
    * frequency and pattern of sampling
    * sampling methods and procedures
    * field screening methods
    * analysis methods
    * the methods for analysing and interpreting field data obtained (for any dynamic or reactive sampling).
The scope and level of detail contained in the SAQP will vary according to the site-specific circumstances and the stage of the investigation.

Flexibility in the SAQP is advisable so that changes may be made during the course of the investigation in response to identified data gaps such as the specific location of sub-surface utilities (which can act