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i <br /> 14 April 1999 <br /> AGE-NC Project No. 98-0481 <br /> Page 2 of 7 <br /> FIELD TEAM OFFICER: Gary Dickenson <br /> FIELD TEAM MEMBERS: Michael Rauser, Mike Schenone, Tony Mikacich <br /> Driller Rig Operator: Central Valley Drilling <br /> Helper if necessary) <br /> Local Agency: San Joaquin County Public Health Services - Environmental Health Division <br /> 304 East Weber Avenue, Third Floor, Stockton, California 95202 <br /> Contractor: Central Valley Drilling <br /> P.O. Box 3012 <br /> Rancho Cordova, CA 95741 <br /> 3.0. ON-SITE CONTROL <br /> The Site Safe Officer will coordinate site access control and security. A exclusion zone will be <br /> � ty <br /> established approximately 10 feet around boring location work areas. No unauthorized person shall <br /> 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 /> CONSTITUENTS OF COIV <br /> CERN.. . >CONCENTRA`-1 NS <br /> Benzene 0.22 ppm in soil; 6,500 ppb in ground water. <br /> Toluene 50 ppm in soil; 35,000 ppb in ground water. <br /> Ethyl-benzene 16 ppm in soil; 4,500 ppb in ground water. <br /> Total xylenes 110 ppm in soil; 25,000 ppb in ground water. <br /> Total Petroleum Hydrocarbons - Diesel 16 ppm in soil; 320,000 ppb in ground water. <br /> Total Petroleum Hydrocarbons - Gasoline 1 1,100 ppm in soil; 93,000 p2b in groundwater <br /> Advanced GeoEnvironmental,Inc. <br />