US EPA method 502.1 is a general analytical method for the monitoring of halogenated, portable VOCs in drinking water and raw water sources by GC with a hall detector. US EPA method 502.2 is a general analytical method for the monitoring of halogenated, purgeable VOCs in drinking water and raw water sources by GC megabore capillary column techniques and hall and photoionization detectors (PID).

US EPA method 601 is a general analytical method for the monitoring of halogenated VOCs in municipal and industrial wastewater by GC with a hall detector. 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 8021 is a general analytical method for the monitoring of VOCs by GC megabore capillary column techniques and hall and photoionization detectors (PID). US EPA method 8260 is a general analytical method for the monitoring of VOCs by GC/MS.

CLP series methods: The US EPA retains analytical services through the contract laboratory program (CLP). The CLP follows detailed SOPs derived from EPA methods and SW-846. The CLP volatile organic analysis method is an analytical method for the analysis of aqueous or solid samples for VOCs by GC/MS.