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a - <br /> r Preliminary'Investigation and Evaluation Report <br /> WEVER TRUCKING <br /> 777 Locust Street, Ripon, California <br /> F <br /> 1.0. INTRODUCTION AND SCOPE OF WORK <br /> 16 <br /> At the request of Mr. Barry Wever, Advanced GeoEnvironmental, Inc. (AGE) has prepared this <br /> Preliminary Investigation and Evaluation Report (PIER) for WEVER TRUCKING located at 777 <br /> - Locust Street, Ripon, California (site). The location of the site is illustrated in Figure 1; a site plan <br /> is shown in Figure 2. <br /> The scope of work included advancement of one soil probe boring to evaluate the vertical extent of <br /> petroleum hydrocarbons in soil and ground water. AGE was prepared to advance additional borings <br /> if necessary, to delineate lateral petroleum hydrocarbon impact to soil and ground water near the <br /> former underground storage tank (UST) area based on field indications of hydrocarbons in soil <br /> and/or ground water. This report is prepared in accordance with guidelines established by the San <br /> Joaquin County Public Health Services-Environmental Health Division(PHS-EHD)and the Central <br /> Valley Regional Water Quality Control Board for investigation of underground storage tank (UST) <br /> sites. <br /> 2.0. BACKGROUND <br /> AGE has been informed that one 750-gallon waste oil UST was removed on 14 June 1991. At the <br /> time of the removal PHS-EHD Was unable to properly evaluate the site for closure as the detection <br /> limits used for the BTEX analysis were too high for the results to be accepted by the PHS-EHD. In <br /> order to receive a site closure certification the PHS-EHD required further site investigation in the ' <br /> area of the former UST. <br /> 3.0. PROCEDURES <br /> r <br /> Tasks and procedures for this investigation were completed by AGE personnel, or under the <br /> direction of AGE personnel, and were conducted under the supervision of a California Registered <br /> Geologist in accordance with Preliminary Site Assessinent lYork Plan dated 01 June 1999, prepared <br /> by AGE. <br /> 3.1. ADVANCEMENT OF SOIL PROBE BORING <br /> One soil probe boring was advanced using AGE's van-mounted Geoprobe 5400 direct-push probing <br /> unit equipped with 1.25-inch probing rods. The Geoprobe advances soil probe borings using a <br /> hydraulic and/or pneumatic hammer to. drive soil and ground water sampling tools to specified' <br /> Advanced CeoEnvironmental,Inc. <br />