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°i <br /> SITE CONTAMINATION WORK PLAN <br /> Four Corners Restaurant <br /> 7505 West Linne Road <br /> Tracy, California <br /> July 1994 <br /> i <br /> 1.0 INTRODUCTION <br /> In accordance with the request of Mr Franklin Cole, property owner, Geological Audit <br /> Services, Inc. (GeoAudit) has prepared this Site Contamination Work Plan for the drilling <br /> of two soil borings at 7505 West Linne Road in Tracy, California (the site). The site <br /> location is illustrated on Figure 1. A plan of the site is illustrated on Figure 2. <br /> a <br /> 2.0 BACKGROUND <br /> 2.1 Site Location d <br /> Located at the northwest comer of the intersection of Chrisman Road and Linne Road, the <br /> site is in a flat rural/agricultural area southeast of Tracy, Califomia, in San Joaquin County <br /> (Figure 1). Jefferson School is located across the intersection southeast of the site. <br /> 2.2 Initial Investigations <br /> It is our understanding that two (2) 1,500-gallon UST's,piping and dispi vere removed <br /> from the property in October of 1993. Samples collected from beneath theij tank did not <br /> detect any hydrocarbon contamination. However, samples collected near the dispenser area <br /> at a depth of six (6) feet indicated that an unauthorized release of hydrocarbons bad <br /> ji <br /> occurred. Total petroleum hydrocarbons (TPH as gasoline) were detected at concentrations <br /> of 48,000 parts per million (ppm); volatile aromatics (BTE&X) wereii detected at <br /> concentrations as great as 6,100 ppm (xylenes). <br /> 2.3 Groundwater Depth and Gradient <br /> The Well Completion Report for a domestic water well drilled in January of 1992 states that <br /> water was encountered near the site at a depth of 54 feet. According to the! San Joaquin <br /> County Flood Control Map (Fall 1990), regional groundwater gradient in the a area is north. <br />