US EPA Method 524 is a GC/MS method for the analysis of purgeable VOCs in finished drinking water. Analytes added to Methanol 524.3 Revision 4 are supplied in a 24-component mix. US EPA Method 624 is a general analytical method for the monitoring of VOCs in municipal and industrial wastewater by GC/MS. US EPA Method 8260 is a general analytical method for the monitoring of VOCs by GC/MS.