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rProblem Assessment,- Feasibili Study Re ort <br /> STRONG,PAOPERTY <br /> r5157.-West Business Loop 205;Tracy, California. <br /> 1.0. 'INTRODUCTION AND SCOPE OF WORK - <br /> -.- ,-On behalf of Messrs. Robert"and Mike Strong, Advanced,GeoEnvironmental; Inc. (AGE).has <br /> prepared the enclosed Problem Assessment Feasibility-Study..Report (PAR-FS) for 5.157 West <br />' Busiriscope of the PAR-FS was to characterizedrocarbon- <br /> hydrocarbon- <br /> impacted <br /> • ess-Loop 205,Tracy,California.,Callfornta. The s p y <br /> impacted soil and,ground water at the 'site and to the evaluate the feasibility and cost aspect of <br /> several remedial action alternatives. The site setting is illustrated in Figure 1. Site structures and' <br /> monitoring well locations are depicted in Figure 2. <br /> rThe PAR-FS was prepared at the direction-of the,Safi Joaquin County Environmental Health _ <br /> Department (EHD) letter.dated11 March 2005"•(Appendix A) and in accordance with guidelines, <br /> establisl�ied by the Central Valley Regional Water Quality Control Board (CVRWQCB)Appednix' i <br /> r A, dated 16 April 2004 for the subsurface investigation of underground storage tank (UST) sites. <br /> BACKGROUND ; <br /> ie The.site is located on the north side of West Business Loop 205 between Bird Road and Banta Road, , <br /> approximately three miles east of Tracy, San Joaquin County, California (Figure 1). The site is <br /> located within the southeast quarter of Section 24,Township 2 South,Range 5 East, Mount Diablo <br />' Base and Meridian(Vernalis Quadrangle, 7.5-Minute USGS.Topographic Series, 1991). . <br /> One'structure is located on the property and is presently unoccupied' It is our understanding,that the <br /> site historically operated 'as a truck depot. <br /> 2.1. ' REGIONAL GEOLOGICAL/HYDROGEOLOGICAL SETTING <br /> is `According to Geologic Map bf California(1966; California Department of Conservation Division` <br /> of Mines and.Geology), the site.area is within the Great Valley Geomorphic Province (GVGP) of <br /> r' California,a large,elongate,northwest trending structural trough.The GVGP.is subdivided into two <br /> major divisions"designated the Sacramento and San Joaquin Valleys, which have been filled to.the <br />' present elevation with'thick.sequences of sediment ranging in age from Jurassic to present day, <br /> creating a nearly flat-lying alluvial­plain' extending from the Tehachapi Mountains in the south to , <br /> the Klamath Mountains in the north: The western and eastern'boundaries of-this province are <br />' comprised of the California Coast Range and the',Sierra Nevada, respectively. <br /> Based on General..Soil Map (1992, United States Department of Agriculture Soil'Conservation <br /> r Service) obtained from the San Joaquin County Soil Survey,the site area is shown as being within <br /> '• the Capay-Stomas-Zacharias(CSZ)soil association.The CSZ soils are located on interfan basins and' <br /> rAdvanced GeoEnvironmeutal,Inc: <br />