What’s New: Sampling for Volatile Organic Compounds in Soil by EPA Method 5035A

American Analytical Laboratories, LLC.

Method 5035A Sampling and Field Kit Guidelines

SW-846 Method 5035A Closed System Purge & Trap and Extraction

For Volatile Organics in Soil and Waste Samples

Background:

The EPA has released and subsequently NYSDOH ELAP has approved guidance on the sample collection of volatile organics by SW-846 Method 5035A. Appendix A of this method provides details regarding the many options available for sample collection. The collection and preservation procedures are intended to prevent loss of Volatile Organics during sample transport, handling and analysis.

 

If samples are not collected according to one of these options, American Analytical is required to qualify any reported sample concentrations as biased low in our final lab report by documenting the potential bias in the narrative section of the data package.

 

Method 5035A Sampling Options:

 

American Analytical encourages the use of one of the following four options for meeting Method 5035A sampling and preservation requirements. Sampling kits must be pre-ordered by calling the laboratory at (631) 454-6100.

 

Option 1:      (allows for both low and high level analysis if warranted)

Sample collection will require the following:

  • 2 pre-weighed 40ml vials containing a small magnetic stir bar and preserved with sodium bisulfate for low level analysis (expected concentrations < 200 ppb)
  • 1 pre-weighed 40ml vial with methanol for high level analysis

(expected concentrations >200 ppb)

  • 1 – 1oz jar for percent moisture determination

 

Note: Option 1 will require 5 grams of soil pre-weighed in the field to be placed into each of the 40ml vials by sampling personnel. Use special care when handling methanol. Methanol is a flammable substance.

 

Option 2:    (allows for both low and high level analysis if warranted)

Sample collection will require the following:

  • 2 Encore 5g sampler for low level analysis
  • 1 – 1oz jar for percent moisture determination
  • 1 – 40ml vial pre-weighed and preserved with Methanol for high level analysis

 

Note: Option 2 will require 5 grams of soil pre-weighed in the field to be placed into the Methanol preserved vial using a Terra Core sampler (or equivalent) and a field balance to check the sample weight. Use special care when handling methanol. Methanol is a flammable substance.

 

Option 3: (allows for only low level analysis)

  • 2 pre-weighed 40ml vials containing a small magnetic stir bar and preserved with sodium bisulfate for low level analysis (expected concentrations < 200 ppb)
  • 1 – 1oz jar for percent moisture determination

 

Option 4: (allows for only low level analysis)

  • 2 Encore 5g sampler for low level analysis
  • 1 – 1oz jar for percent moisture determination

 

Return all encores to the laboratory ASAP. Samples must either be analyzed or be transferred from the encores and preserved by the lab within 48 hours of collection.

 

What’s New at American:

Method 5035A outlines the procedures for sample collection and analysis of soils and solid wastes for volatile organic compounds (VOCs).