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' APPENDIX A - Historical Background <br /> • Five Star Marina <br /> ' (Former Stephens Marine) <br /> SITE HISTORY <br /> AGE researched the site history, conducted a review of available historical public records and <br /> ' interviewed current land owner and representatives during the course of a Phase I Environmental Site <br /> Assessment for a real estate evaluation The history of the parcel of interest was derived from the <br /> Phase I research <br /> ' SITE DESCRIPTION <br /> The site is located in an industrial area of low topographic relief, located '/4-mile east of the <br /> intersection of Fremont Street and Pershing Avenue at approximately 10 feet above sea level Two <br /> main clusters of structures are located on the property(Figure 2) Most of the site was used as a ship <br /> building warehouse from the early 1910's through the mid 1980's The remaining portions are <br /> ' presently occupied by an auto repair shop, a sheet metal shop and a boat storage facility The site is <br /> currently operated by Five Star Manna and other light industrial businesses The surface of the site <br /> is covered with mostly asphalt and concrete <br /> lie <br /> REGIONAL GROUND WATER <br /> ' The estimated depth to ground water at this property is approximately 20 feet bsg, based on <br /> information from Lines of Equal Depth of Water Wells, Fall 1995 published by the San Joaquin <br /> County Flood Control District and Water Conservation District However, the PHS-EHD records <br /> indicted that the highest ground water was observed at the site in 1986 at 10 feet bsg Dunng <br /> previous site investigations at the site, ground water was encountered at a depth of 12 feet bsg The <br /> ' prevailing ground water flow in this portion of western Stockton flows generally to the northeast, <br /> while localized ground water flow may vary during winter/summer cycles <br /> UNDERGROUND STORAGE TANK REMOVAL <br /> ' One 550-gallon gasoline UST(West UST Area)was removed from the City of Stockton right-of-way <br /> in San Jose Street in May 1986 Total volatile hydrocarbons(TVH)and volatile aromatics(benzene, <br /> toluene, ethylbenzene and xylenes BTE&X)were detected at concentrations as high as 2,000 parts <br /> per million(ppm) in a single soil sample collected from the UST excavation <br /> ' One 4,000-gallon gasoline UST(East UST Area)was removed from the site on 13 November 1997 <br /> The UST was located in Lindsay Street, between the northern and southern blocks of buildings <br /> • Upon removal of the UST, holes were noted at the western end and in the bottom of the UST <br />