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3 <br /> Moving or falling objects are hazards present in the vicinity of an operating drill rig. <br /> Only essential personnel and no bystanders will be permitted near the drill rig itself. Hard hats, <br /> steel-toed boots, and safety glasses will be worn at all times. All personnel will be instructed <br /> ` how and when to use the drill rig's kill switch(es). <br /> The area around the immediate vicinity of the drilling rig will be cordoned off with <br /> caution tape and/or delineation cones to minimize traffic and onlookers.I Only project personnel <br /> wearing the appropriate personal protection equipment will be allowed in this area. <br /> CHEMICAL HAZARDS <br /> A variety of organic constituents may be detected in the subsurface. BTEX and other <br /> volatile organic compounds (VOCs) related to additives used in gasoline may be found when <br /> drilling and sampling. <br /> Respiratory hazards related to the above-listed chemicals might arise if vapors, gases, <br /> dust, or mist are released into the breathing zone during drilling and/or sampling. Previous air- <br /> monitoring experience indicates that dilution occurs in the immediate vicinity of the boreholes. <br /> It is assumed for health and safety reasons that VOCs could potentially be present in soils <br /> beneath the site. VOCs are central nervous system depressants that produce similar symptoms <br /> in victims via skin absorption or inhalation of moderate vapor-phase concentrations. General <br /> symptoms of exposure, both acute and chronic, may include euphoria, headache, weakness, <br /> dizziness, nausea, narcosis, and possibly coma. Certain constituents are also skin and eye <br /> irritants,while benzene is a suspected carcinogen. <br /> Exposure routes during the proposed 'activities are inhalation and skin contact. To a <br /> lesser degree, ingestion of contaminants and direct contact with the circulatory system (through <br /> cuts, abrasions, etc.) could also occur. The exposure limits are identified in the following <br /> summary of anticipated chemical hazards. The constituent with the lowest PEL is benzene, <br /> with a PEL of 1 part per million (ppm). <br /> Project No. RCO291.001 <br /> GERAGHTY MILLER. INC. t� <br />