Department of Health Seal

TGM for the Implementation of the Hawai'i State Contingency Plan
Subsection 8.3


Field screening methods with supporting documentation equivalent to that published by the USEPA for standard laboratory methods typically offer a higher level of data quality and reliability (e.g., SW-846, USEPA 2010). Documentation for the field screening methods describes the intended use, proper application, interferences, and overall performance in comparison to laboratory methods. The methods also list the required equipment, supplies, reagents and standards as well as information on safety, pollution prevention, and waste disposal. In addition, the methods typically provide a procedure that outlines required quality control, calibration, data analysis and result calculation. As described in Subsection 8.4 below and in the links to USEPA methods, documentation has been published by the USEPA for many but not all field screening methods. Field screening methods from a source other than the USEPA methods would ideally cover the same level of detail, but at a minimum, documentation for field screening methods should cover the following:

  1. Method Description: A summary of the method and instrumentation, including a list of target analytes and detection limits.
  2. Calibration: Typically the HEER Office prefers a daily 3-point initial calibration, although some methods may only require a monthly initial calibration. A mid-level continuing calibration standard which is analyzed every 20 samples is recommended; however, some methods may only require one such standard at the beginning and end of daily sample analysis. The method should include criteria as to what constitutes an acceptable initial and continuing calibration.
  3. Blank: The HEER Office prefers a baseline or a blank every 20 samples; however, some methods may only require a blank at the beginning of daily sample analysis. The method should include criteria as to what constitutes an acceptable blank.
  4. Corrective Action: The method should include corrective actions for failure to meet the criteria for initial calibration, continuing calibration and/or blanks.

Field screening method information should be presented in the form of a standard operating procedure (SOP) and included in the QAPP. Documentation of the field use of a field screening method should be recorded on established field data sheets which at a minimum include:

  1. Instrument: Type, maintenance, initial and continuing calibrations, blanks, and any failure to meet criteria along with the corrective action taken.
  2. Sample analysis: Date and time of analysis, sample identification, instrument reading, including data analysis and result calculation if applicable.

Example sources for field screening methods are provided in Table 8-2:

Table 8-2 Sources for Field Screening Methods
Source/Website Comments
USEPA’s Field Analytic Technologies (USEPA, 2007), Overview of multiple field analytic techniques, with links to the majority of documents included on the Clu-in web page
USEPA’s SW-846 Methods: Use search function to locate specific field screening methods
USEPA’s Expedited Site Assessment Tools For Underground Storage Tank Sites (1997): 1997 overview of field methods for petroleum
USEPA ETV Program: View information under subheading “Verified Technologies”; includes links to supporting documents.
ASTM International: Use search function to look for specific method information.
Interstate Technology and Regulatory Council (ITRC): See field measurement methods in the Triad Approach and Site Characterization and Monitoring topics
California Environmental Technology Certification (ETC) Program:
Due to state funding shortfalls, these certifications are no longer current; however, the website is still a potential resource on field screening methods.
See ETC “Hazardous Constituents” List for substance-specific technologies