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21 March 2005 <br /> AGE-NC Project No. 04-1239 <br /> Page 2 of 7 <br /> Local Agency: San Joaquin County Environmental Health Department <br /> 304 East Weber Avenue,Third Floor, Stockton, CA 95202 <br /> Contractor: Advanced GeoEnvironmental, Inc. <br /> 837 Shaw Road, Stockton, California 95215 <br /> 3.0. ON-SITE CONTROL <br /> The Site Safety Officer will coordinate site access control and security. A exclusion zone will be <br /> established approximately 10-15 feet around boring location work areas.No unauthorized person <br /> shall be allowed within this exclusion area. <br /> 4.0. HAZARD EVALUATION <br /> The following substance(s) or hazards are known or suspected to be on site. <br /> SUBSTANCES INVOLVED: CONCENTRATIONS: <br /> Gasoline (TPH-g) unknown <br /> Volatile Organic Compounds unknown <br /> The primary hazards of each are identified as follows: <br /> 1. Hydrocarbon fuels (including volatile organic compounds [VOCs])- Components of fuels <br /> are colorless liquids with strong aromatic petroleum hydrocarbon-like odors. They are <br /> flammable and have low solubility in water. Exposure to these materials in excess of <br /> recommended exposure limits can cause mild eye,nose,and throat irritation and can produce <br /> a narcotic effect on the central nervous system. Symptoms of exposure at these <br /> concentrations include headache, nausea, drowsiness, dizziness, and loss of coordination. <br /> Certain components of gasoline (BTEX, 1,2-DCA, MTBE, etc.) are known or suspected <br /> carcinogens. <br /> The additional potential hazards include: Slip-trip-fall hazards, noise, heavy equipment (i.e., drill <br /> rig),vibration hazards, traffic hazards, etc. <br /> Advanced GeoEnvironmenml,Inc. <br />