Synthetic organic compounds (SOC) measurement context
The drinking-water SOC group combines EPA Methods 525.2, 531.1 and 515.3, described below. Each part can also be ordered on its own, as can glyphosate.
Chlorinated acid herbicides measurement context
EPA Method 515.3: acid herbicides such as 2,4-D, dalapon and pentachlorophenol are extracted from the acidified sample, converted to their methyl esters, and measured by gas chromatography with an electron capture detector. Reported in µg/L.
Provide the compound list
A class name does not establish every target included. Specify the compounds, applicable drinking-water program and reporting limits; use the prescribed bottle and handling plan for the scope.
Include the complete project requirement
Provide the matrix, target analytes, required method, fraction, units and reporting limits. Include the permit or monitoring instructions where results will support a regulatory submission. Naming this method does not establish blanket compliance eligibility.
Resolve collection before sampling
Use the bottle, preservation and delivery instructions assigned to the agreed scope. Identify each location and collection time, and document any deviation. The final analytical plan must fit the submitted material and its intended use.
Related testing & guidance
Technical & service references
Vanguard service detailsSource review: November 8, 2026. The agreed method and project scope govern the testing.