1.1 These test methods provide a means for determining low levels of 1,1,1-trichloroethane and methylene chloride in virgin or reclaimed trichloroethylene and tetrachloroethylene.

1.2 Two test methods are covered, as follows:

1.2.1 Test Method A -Capillary column gas chromatographic determination of 1,1,1-trichloroethane and methylene chloride in trichloroethylene and tetrachloroethylene.

1.2.2 Test Method B-Packed column gas chromatographic determination of 1,1,1-trichloroethane and methylene chloride in trichloroethylene and tetrachloroethylene.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.