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��="� �,s�"`�••,..a.s� �� �} � ��. -rte"-,� _ �;.r'" � �s.�,�-���`i '"a ..sem. � _� <br /> :m. <br /> SECTION I <br /> INTRODUCTION <br /> This document presents the results of a soil and groundwater <br /> investigation completed at the Manna Pro Feed Mill facility located at <br /> 4004 El Dorado Street, Stockton, San Joaquin County, California. The <br /> location of this facility is shown on Figure 1-1. The facility consists of <br /> a feed mill and warehouse that is presently idle. A Phase II site <br /> audit of the facility was conducted by WHF Environmental <br /> Consultants in February 1990. During the audit, five.underground <br /> fuel tanks were identified in the northwest corner of the property. <br /> The fuel tanks were removed by SEMCO (subcontracted to WHF) in <br /> June 1990. Diesel and gasoline contamination was found in the <br /> underlying soils after the tanks were removed. Contamination was <br /> also found underneath the fuel pumps, to the southeast of the tanks. <br /> Are-excavation workplan was prepared by WHF in July 1990 and <br /> approved by San Joaquin County. Approximately 2,500 cubic yards of <br /> soil were then excavated by SEMCO from the area and stockpiled on- <br /> site. An addendum to the re-excavation workplan calling for <br /> removal of 5,000 cubic yards of soil was filed with San Joaquin County <br /> on September 12, 1990 and was approved by the County. It is <br /> unknown if the 5,000 cubic yards refers to additional or total yardage. <br /> Currently, a large excavation pit exists in the parking lot near the <br /> northwest corner of the property (Figure 1-2). Soil has been mounded <br /> around the pit, and a temporary chain link fence has been placed on <br /> top of the mounded soil. The excavated soil has been segregated into <br /> stockpiles of clean and contaminated soil (Figure 1-3). <br /> Before proceeding with further excavation, O'Melveny & Myers <br /> (council for Manna Pro, Inc.) contracted with ERM-West, .Inc. to <br /> review the status of the work performed to date and provide <br /> recommendations for further activities at the site. The initial <br /> assessment work by ERM-West completed in October 1990 consisted of <br /> trenching and sampling within the existing excavation. ERM-West <br /> recommended that an investigation be performed to determine the <br /> extent of soil contamination prior to proceeding further with <br /> excavation of contaminated soil. Accordingly, additional excavation <br /> of the site was done October 11, 1990, under the auspices of the <br /> approved_September_12_workplan_addendum. <br /> 1-11 <br />