You must ensure that no employee is exposed to an airborne concentration of MDA in excess of 10 parts per billion (10 ppb) as an 8-hour time-weighted average and a STEL of 100 parts per billion (100 ppb).

[Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, 49.17.060. WSR 16-09-085, § 296-155-17305, filed 4/19/16, effective 5/20/16. Statutory Authority: Chapter 49.17 RCW. WSR 93-04-111 (Order 92-15), § 296-155-17305, filed 2/3/93, effective 3/15/93.]

PDFWAC 296-155-17305

Permissible exposure limits.