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'400 \.► NATIONAL ADVERTISING COMPANY- ADDITIONAL SUBSURFACE INVESTIGATION HEALTH AND SAFETI PLAN 6.5 HEAT STRESS t"r Heat stress is a major hazard, especially for workers wearing protective clothing. The same protective materials that shield the body from chemical exposure also limit the dissipation of body heat and moisture. Personal protective clothing can therefore create a hazardous condition. Depending on the ambient conditions and the work being performed, heat stress can occur very rapidly, within as little as 15 minutes. Site personnel should have received training and be familiar with the signs and symptoms pertaining to the identification of a heat stress victim, the first-aid treatment procedures for the victim and the prevention of heat stress casualties. Heat stress monitoring procedures are provided in Section 7.3, while guidance concerning the signs, symptoms and response actions for heat stress related illnesses are presented in Section 11.6.3. 6.6 UNDERGROUND UTILITIES Various forms of underground utility lines or pipes may be encountered during intrusive work activities. +r Prior to the start of intrusive operations to following steps will be taken I- 1. Underground Service Alert (Dig Alert) will be contacted at least 48 hours prior to the work 2. Geophysical clearance will be performed i. 3. Authorization will be obtained from all concerned public utility department offices. Should intrusive operations cause equipment to come into contact with utility lines, the SSO and the Health and Safety Professional will be notified immediately, and a Supervisor's Report of Incident (see Appendix B) will be completed. Work will be suspended until the appropriate actions for the particular situations can be taken. 6.7 DUST AND VAPOR SUPPRESSION In the event that work activities create excessive dust levels (based on worker comfort) or monitoring activities (Section 7.1) indicate that airborne concentrations of contaminants exceed established action levels (see Table 7-2), the SSO will implement appropriate mitigation measures, such as: Drilling 1. Reduce the advance rate of the drilling action. %. 2. Apply water obtained from the drill rig water supply tank using garden hose (or similar). V� Groundwater Well Develo ment/Sam lin 1. Partially cover the open wellhead to reduce the escape of contaminants. 2. Place a cover on the container of collected spoils if this material is identified as the source of measurable emissions. If mitigation measures are found to be inadequate (contaminant concentrations cannot be reduced below Table 7-2 requirements), the SSO/Work Supervisor will halt on-site operations until effective control can be achieved. a' 6.8 DRUM HANDLING Where containers of capacity greater than 10 gallons are used for containerizing chemical products or waste materials, handling of the containers will be accomplished in accordance with the following: hslprojsuplcominachasp.doc 6-2 62/09/98 i.r