CFR > Title 46 - Shipping > CHAPTER I—COAST GUARD, DEPARTMENT OF HOMELAND SECURITY > SUBCHAPTER V—MARINE OCCUPATIONAL SAFETY AND HEALTH STANDARDS (parts 197 to 198) > PART 197—GENERAL PROVISIONS > SUBPART C—Benzene (§197.501 to §197.580) > 197.515—Permissible exposure limits (PELs).

197.515—Permissible exposure limits (PELs).

The permissible exposure limits (PELs) for personal exposure are as follows:
(a) The time-weighted average exposure limit (TWA).
(b) The short-term exposure limit (STEL). Exposures at the STEL must not be repeated more than four times a day. There must be at least 60 minutes between successive exposures at the STEL.