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Appendix A to Work Plan Lodi Ready Mix 851 East Lodi Avenue Lodi, California Project No. 93.1 May 25, 1993 1.0 HEALTH AND SAFETY PROGRAM Geological Technics has incorporated the following health and safety precautions while working on sites containing unidentified hazardous waste. Once the nature and extent of contamination has been determined, additional work on site •wilrbe'metwith�tlle'proper'prec`autions.- 1.1 Workers Health and Safety 1.1.1 Work Space Safety The perimeter of the workspace should, if possible, be 20 feet from the drilling rig or excavation site. The working perimeter will be marked by brightly colored delineators. All unauthorized personnel will not be allowed access into the work space. The project supervisor will coordinate all field activities and maintain the safest possible working environment at all times. If an emergency occurs, the supervisor will immediately contact the proper authorities. 1.1.2 Skin and Head Protection Disposable suits, boots, and gloves will be worn when the working conditions require such precautions. Disposable plastic gloves will be worn at all times during soil and groundwater sampling. The gloves will be changed"after each sample t as been`collected: Used disposable clothing will be properly discarded at the end of each working day. Hard hats will be worn during drilling, excavation, and other activities in which potentially dangerous equipment is being operated within the work space. 1.1.3 Face and Resvi.ratoru Protection. During drilling and excavation activities, the working air space will be periodically monitored with either a Photo Ionization Detector (PID) or SKC Color-Detector Tubes (Draeger Tubes) for gas and vapor content. The PTD measures the total organic compounds (VOC) vapor concentration while the