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cotton (or other flame retardant material) coveralls, rubber or neoprene work gloves (surgical gloves may be worn alone when not handling heavy equipment), steel toed rubber boots (mid-calf length), OSHA/NIOSH approved hard hat conforming to ANSI Z89.2-1979 (impact and electrical protection); safety glasses or goggles. Where relatively high concentrations of volatile organics are expected, Level C protective equipment is required. This protectin includes the wearing of organic vapor monitors (3M Standard Model 3500, or equivelent) for our field personnel and drilling contractors crews as well as: disposable, acid and chemical resistant coveralls (TYVEK), rubber or neoprene outer gloves (18" length) with rubber inner gloves (11" surgical), chemical splash goggles, OHSA/NIOSH approved hardhat conforming to ANSI Z89.2-1979, and half-face respirators with combination acid gases/organic vapor cartridges (Type F filters will be worn when dusty conditions prevail). Respirators should be readily available but need not be worn unless the HNu gas analyzer indicates the presence of organic gases in excess of 10% of the Permissible Exposure Level (PEL) or excessively dusty conditions prevail during drilling. We suggest that the drilling contractor provide equivalent protective equipment for their crews working in Level D or, if required, Level C areas. Drillers and helpers should not wear gauntlet type gloves because cuffs can easily get caught in moving parts. Specific safety requirements follow: All MARK personnel who will be working at the site, will undergo an industrial hygiene baseline medical examination before commencing work. This requirement does not apply to individuals who have taken the examination during the past 12 months. The same personnel must be fitted and fully instructed on the use of respirators prior to starting the work. Eating, drinking, chewing gum or tobacco, smoking, or any practices that increases the probability of hand-to-mouth transfer and ingestion of material is prohibited in any area of drilling.