EPA Method 25C


ALS - Columbia offers EPA Method 25C testing at these laboratories:

Simi Valley Simi Valley, California Laboratory

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EPA Method 25C:
DETERMINATION OF NONMETHANE ORGANIC COMPOUNDS (NMOC) IN LANDFILL GASES

Summary:
A sample probe that has been perforated at one end is driven or augured to a depth of 0.9 m (3 ft) below the bottom of the landfill cover. A sample of the landfill gas 1269 is extracted with an evacuated cylinder. The NMOC content of the gas is determined by injecting a portion of the gas into a gas chromatographic column to separate the NMOC from carbon monoxide (CO), carbon dioxide (CO2), and methane (CH4); the NMOC are oxidized to CO2, reduced to CH4, and measured by a flame ionization detector (FID). In this manner, the variable response of the FID associated with different types of organics is eliminated.

Scope:
This method is applicable to the sampling and measurement of NMOC as carbon in landfill gases (LFG).

Test Description:
VOC of Waste Samples

Date Issued:
8/20/1996

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Examples:  8260
TO-15

Examples:  Dioxin
Mercury
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