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SECTION 1 <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 ipresently idle.gure 1-1. The f A1Phase it consistsite <br /> s of <br /> a feed mill and warehouse that is <br /> audit of the facility was <br />' vironmental <br /> conducted DuDuringng the audit�fivenunderground Consultants in February 1990 <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 /> A re-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 (Figureain link fencelhassbeen mounded <br /> been placed on <br /> around the pit, and a temporary <br /> top of the mounded soil The <br /> rexcavated <br /> so 1 (Figurele3} segregated into <br />' stockpiles of clean and co <br /> Before proceeding with further excavation, O'Melveny & Myers <br /> (council for Manna Pro, <br /> r thenwork performed ontracted with <br /> ta date and, Inc to <br /> provide <br />' review the status <br /> recommendations for further activities at the site The initial <br /> assessment work by ERM-West h� cthe��dingexcavation ctober o ERMtWest <br /> ed of <br /> trenching and sampling <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 , 19 addendum under the auspices of the <br /> approved September 12 workplan <br />' 1-1 <br />