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1 . 0 INTRODUCTION <br /> This submittal outlines Aqua Science Engineer's, Inc. (ASE) workplan for a <br /> soil assessment at the Hanson Property located at 7750 Schulte Road in. <br /> Tracy, California (Figures 1 and 2). The intent of this assessment is to <br /> provide the San Joaquin County Department of Public Health Services <br /> (SJCDPHS) the necessary information to prepare a case closure letter <br /> regarding the underground storage tank (UST) which was formally located <br /> at the site. <br /> 2 . 0 BACKGROUND INFORMATION <br /> In May 1995, ASE drilled one soil boring in the location of a former UST <br /> which was removed by others sometime in the past. ASE found n o <br /> evidence of contamination related to the former UST; however, the <br /> SJCDPHS requested that an additional assessment be performed at the site <br /> prior to writing a case closure letter. The purpose of this assessment is to <br /> obtain the information necessary for the SJCDPHS to prepare a case closure <br /> letter. <br /> 3 . 0 PROPOSED SCOPE OF WORK <br /> ASE's proposed scope of work is to: <br /> 1 ) Prepare a workplan and health and safety plan for approval by the <br /> SJCDPHS. <br /> 2) Obtain a soil boring permit from SJCDPHS. <br /> 3 ) Using a hand auger, drill two soil borings in the location of the former <br /> UST. The borings will be drilled to a depth below the bottom of t h e <br /> former UST, estimated to be 8-feet below ground surface. A soil <br /> sample will be collected from the bottom of each boring for analysis. <br /> 4) Analyze each soil sample at a CAL-EPA certified analytical laboratory <br /> for total petroleum hydrocarbons as gasoline (TPH-G) by modified EPA <br /> Method 5030/8015, total petroleum hydrocarbons as diesel (TPH-D) <br /> by modified EPA Method 3510/8015, benzene, toluene, ethylbenzene <br /> and total xylenes (collectively known as BTEX) by EPA Method 8020, <br /> fuel oxygenates by modified EPA Method 8260, and total lead by EPA <br /> Method 6010. <br /> 5 ) Backfill the borings with neat cement. <br /> Hanson Property Workplan - June 1998 <br /> -1 - <br />