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GEOCHECK' - PHYSICAL SETTING SOURCE.SUMMARY <br /> GROUNDWATER FLOW VELOCITY INFORMATION l <br /> termined by a qualified environmental professional <br /> Groundwater flow velocity information for a particular site is best de <br /> using site specific geologic and soil strata data. if such data are not reasonably ascertainable, it may be necessary <br /> to rely on other sources of information,including geologic age identification, rock stratigraphic unit and soil <br /> characteristics data collected on nearby properties and regional soil information. In general,contaminant plumes <br /> move more quickly through sandy-gravelly types of soils than silty-clayey types Of soils. <br /> GEOLOGIC INFORMATION IN GENERAL AREA OF TARGET PROPERTY <br /> Geologic information can be used by the environmental professional in forming an opinion about the relative speed <br /> at which contaminant migration may be occurring. <br /> Fi, ROCK STRATIGRAPHIC UNIT GEOLOGIC AGE IDENTIFICATION <br /> Era: Cenozoic Category: Continental Deposits <br /> System: Tertiary <br /> Series: Pliocene <br /> 1 ! Code: Tpc (decoded above as Era,System&Series) <br /> Geologic Age and Rock Stratigraphic Unit Source: P.G.Schruben, R.E.Arndt and W.J. BawieC,Geology <br /> ' of the Conterminous U.S. at 1:2,500,000 Scale-a digital representation of the 1974 P.B. King and H.M. Beikman <br /> Map,USGS Digital Data Series DDS- 11 (1994). <br /> DOMINANT SOIL COMPOSITION IN GENERAL AREA OF TARGET PROPERTY <br /> The U.S. Department of Agriculture's(USDA) Soil Conservation Service (SCS) leads the National Cooperative Soil <br /> Survey(NCSS)and is responsible for collecting,storing, maintaining and distributing soil survey information <br /> for privately owned lands in the United States.A soil map in a soil survey is a representation of soil patterns <br /> in a landscape. Soil maps for STATSGO are compiled by generalizing more detailed (SSURGO)soil survey maps. <br /> 3 The following information is based on Soil Conservation Service STATSGO data. <br /> Soil Component Name: PENTZ <br /> J Soil Surface Texture: gravelly- loam <br /> Hydrologic Group: Class D-Very slow infiltration rates. Soils are clayey, have a high <br /> water table, or are shallow to an impervious layer. <br /> ! 1 <br /> Soil Drainage Class: Well drained. Soils have intermediate water holding capacity. Depth to <br /> water table is more than 6 feet. <br /> Hydric Status: Soil does not meet the requirements for a hydric soil. <br /> Corrosion Potential- Uncoated Steel: MODERATE <br /> Depth to Bedrock Min: > 10 inches <br /> Depth to Bedrock Max: >20 inches <br /> F <br /> k <br /> TC1574641.1s Page A-4 <br />