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rl e <br /> u a <br /> PRELIMINARY INVESTIGATION AND EVALUATION REPORT <br /> ` August 1996 <br /> Weldon Church, Inc. <br /> 104 West Beverly Place <br /> Tracy, California <br /> 1.0. INTRODUCTION <br /> In accordance with the request of Mr. Weldon Church,Advanced Geo Environmental, Inc. (AGE) <br /> has prepared the enclosed Preliminary Investigation and Evaluation Report(PIER) for the site at 104 <br /> West Beverly Place, Tracy, California(the site). The objective of the investigation was to determine <br /> the lateral and vertical extent of hydrocarbon-impacted soil and ground water. The scope of work <br /> included the advancement of six soil probe borings and the installation and sampling of four ground <br /> water monitoring wells. The location of the site is illustrated on Figure 1 - Location Map. A plan of <br /> the site is illustrated on Figure 2 - Site Plan. <br /> The work is performed in accordance with San Joaquin County Public Health Services - <br /> Environmental Health Division (PHS-EHD) and Central Valley Regional Water Quality Control <br /> Board guidelines for investigation of underground storage tank (UST) sites. <br /> 2.0. BACKGROUND <br /> 2.1. SITE LOCATION <br /> The site is located in a residential area of central Tracy, California, in San Joaquin County (Figure <br /> 1). One house and a detached garage/storage area are currently located on the property. An apartment <br /> complex is located immediately west of the former UST area;residences are located to the south and <br /> east of the site. <br /> 2.2. UNDERGROUND STORAGE TANK REMOVAL <br /> One small capacity (less than 550 gallons) UST was installed at the site in the early 1980s. The tank <br /> was used to fuel vehicles associated with Church Refrigeration, a company owned and operated by <br /> Weldon Church. The tank was removed in early 1988. Ground water was encountered in the tank <br /> excavation during removal. Subsequently, one soil and one grab water sample were collected from <br /> the tank excavation in August 1988. <br /> Both samples were analyzed for total petroleum hydrocarbons quantified as gasoline (TPH-g), <br /> stoddard solvents,paint thinner, diesel,kerosene,motor oil and volatile aromatics (benzene,toluene, <br /> ethyl benzene and xylene: BTE&X). TPH-g, toluene and xylenes were detected in the soil sample <br /> at concentrations of 530 parts per million (ppm, reported as milligrams per kilogram), 21.0 ppm and <br /> l <br />