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A-4 4.1 Personnel Responsibilities Key personnel directly involved in the investigation who will be responsible for monitoring the execution of safe work practices and the provisions of this plan are 1) the drilling-subcontractor project supervisor and 2) the Delta project field manager. These personnel are responsible for knowing the provisions of the plan, communicating plan requirements to workers under their supervision and to site visitors, and for enforcing the plan. 4.2 Personnel Protection The designated personnel-protective equipment is selected to prevent field personnel from exposure to gasoline fuel products that may be present at the site. To prevent direct skin contact, the following protective clothing will be worn as appropriate while working at the site: 1) Hard hat with optional face shield 2) Tyvek coveralls 3) Butyl rubber or disposable vinyl gloves 4) Steel toed boots 5) Goggles or safety glasses (if optional face shield is not used on the'l hard hat) The type of gloves used will be determined by the type of work being performed. Drilling personnel will be required to wear butyl rubber gloves because they will have long duration contact with the subsurface materials. Delta sampling personnel will wear disposable gloves when handling any sample. These gloves will be changed between each sample. Personnel-protective equipment shall be put on before entering the immediate work area. The sleeves of the coveralls shall be outside of the cuffs of the gloves to facilitate removal of clothing with the least potential contamination of personnel. If at any time protective clothing(coveralls,boots,or gloves)becomes torn,wet, or excessively soiled, it will be replaced immediately. Total organic vapors will be monitored at the site with a portable photoionization detector (PID). Should the total organic vapor content approach that of the threshold limit value (TLV) for any of the substances of concern (benzene, toluene, ethlybenzene, or xylenes), appropriate safety precautions will be carried out w under the direction of the site project leader. These precautions include, but are not limited to, the following: 1) Donning of respirators (with appropriate cartridges)by site personnel,'2) forced ventilation of the site,3) shut-down of work until such time as appropriate safety measures sufficient to insure the health and safety of the site personnel can be implemented. The attached Health and Safety Plan provides emergency phone numbers and hospital route information for the site. The plan will be available at the site during installation of the soil borings.