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1117 Lone Palm Avenue, Suite B <br /> T Modesto, CA-95351 <br /> www atc-enviro com <br /> 209 579 2221 <br /> A g $ O C I A T E $ I N C <br /> Fax 209 579 2225 <br /> i <br /> April 9, 2004 <br /> 54 62514 0001 <br /> Mr Michael Infirna <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> 304 East Weber Avenue, 3rd Floor <br /> Stockton, CA 95202 <br /> Subject Fourth Quarter 2003 Groundwater Monitoring Report for King Island Resort, 11530 <br /> West Eight Mile Road, Stockton, California Site Code 1557 <br /> Mr Infiurna <br /> This letter report is presented to update site activities performed dunng the Fourth Quarter 2003 at <br /> 11530 West Eight Mile Road, Stockton, California (Figure 1) Site activities included quarterly <br /> l groundwater monitoring and sampling and reporting <br /> BACKGROUND <br /> The King Island property previously contained three underground storage tanks (USTs) The <br /> tanks consisted of one 6,000-gallon regular, one 2,000-gallon regular, and one 4,000-gallon <br /> diesel tank The USTs have been removed and replaced with one split aboveground storage tank <br /> (AST) containing premium gasoline and regular gasoline <br /> In March 1989, hydrocarbon impacted soil was detected to the east of the restaurant building <br /> during a geotechnical investigation by Kleinfelder, Inc In April 1989, two shallow borings were <br /> advanced and soil samples were collected from depths of 3 to 5 feet below ground surface (bgs), <br /> and grab groundwater samples were also collected from the bonngs Elevated concentrations of <br /> total petroleum hydrocarbons and benzene were detected in soil and groundwater <br /> On August 19, 1989, diesel fuel was discovered leaking from a product line between the <br /> buildings and the backside of the levee The diesel fuel line was purged, capped, and removed <br /> A new diesel fuel line and gasoline fuel line were installed and placed above ground <br /> Approximately 40 cubic yards of petroleum affected peat were excavated and removed by Falcon <br /> Energy, and replaced with sandy loam backfill <br /> In order to assess the potential presence of hydrocarbons at the site a soil vapor survey was <br /> performed in March 1990 Soil vapor samples were collected from 29 locations at approximate <br /> s 1625141quar0yl4gr-2003 doc I <br /> ENVIRONMENTAL, GEOTECHNICAL AND MATERIALS PROFESSIONALS <br />