|Text of Test Method 5A - PM Asphalt Roofing (Particulate Matter)
FREQUENTLY ASKED QUESTIONS (FAQS)
This method requires the use of 1,1,1-trichloroethane
for probe wash. This product is apparently no longer available or very hard to get.
Is there an alternative available for use?
EPA has approved a modification to Method 5A to allow the use of an alternative solvent
for the 1,1,1-trichloroethane. The alternative solvent is 1-bromopropane. The approved
alternative is posted under Methods, Category B, Source Category Approved Alternative Methods. It
is ALT-067, Approval of Modifications to Method 5A for Various Rules.