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Harken Marketing Company of California <br /> Location#100966 Page 5 <br /> November 22, 1991 <br /> testing. Analyses consisted of: TPH, BTXE, EDC,and EDB using Modified EPA Method 8240, <br /> and Total Lead using EPA Method 7420. <br /> Soil sample selection was based on soil types, OVA readings, and depth. The analytical <br /> results and depths of samples submitted for laboratory analysis are presented In Table 1. <br /> Laboratory Issued reports and Chain-of-Custody forms are in Appondix B. <br /> 5.0 FINDINGS <br /> 5.1 soil charocleristics <br /> The subject site is located at an approximate elevation of 25 feet above mean sea <br /> level and rests on Interbedded alluvial deposits, Generally. the soils consist of <br /> t�nconsolidated, massively bedded slits, clayey sands, silty sands. and poorly graded <br /> q - this <br /> sands,. i The sediments contained some areas of weak. partial c mentation. <br /> phenomenon appeared to Increase with depth. Carbonate concretions were common <br /> within the finer grained soils, The sands encountered were generally fine to very fine <br /> grained,except In the areas of poorly graded sands where the sand grain size was fine to <br /> medium. Fine gravel commonly occurred within the sands. The alluvial deposits are <br /> covered with asphalt over most of the site. <br /> ature of <br /> The major subsurface units appear to be discontinuous. Due to the fine grained n <br /> the majority of the sediments,subtle changes within sediment size often resulted in facies <br /> changes,and thus resulted In classification as a different soil type. For example.,if the very <br /> fine sand In the silty sand untts was not apparent,then the soil become primarily silt and was <br /> logged as silt. Soll.transitions were usually gradotional. Th�.pqqrly.graded sand.unit.,whIch. <br /> served as an easily Identified unit,only occurred In two of the th�ree'borings and at different <br /> depths and thicknesses. <br /> 5.2 Ground Water <br /> Ground water In the site area is generally classified as unconfined and is designated to be <br /> of-beneficlal use._Reportedly...the.f irst grpundwate r occurs approximately 80 feet bgs within <br /> the site vicinity during the time of drilling..However, historical records Indicate that ground <br />