Excerpts
this part, or, as an alternative, according to ASTM D7520â16 (incorporated by reference, see §â60.17), with the caveats described under
Shop opacity ⦠this part, or, as an alternative, according to ASTM D7520â16 (incorporated by reference, see §â60.17), with the caveats described under
Shop opacity ⦠emissions at 15-second intervals. Alternatively, ASTM D7520â16 (incorporated by reference, see §â60.17), may be used with the following five conditions: