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1 <br /> P' <br /> fi r xa- m <br /> GEOCHECW - PNYSAL SETTING SOURCE SUMMARY <br />' Site-Specific Hydrlogeologlcal Data* <br /> Search Radius 2 0 miles <br /> Location Relative to TP 1 -2 Miles SE <br /> Site Name Tracy Defense Depot <br /> Site EPA ID Number CA4971520634 <br /> Groundwater Flow Direction Northeast <br /> Measured Depth to Water 15 feet to 40 feet <br /> Hydraulic Connection An aquitard separates the surficial and lower aquifers <br />' Sole Source Aquifer No information about a sole source aquifer is available <br /> Data Quality Information based on site-specific subsurface investigations is <br /> documented in the CERCLIS investigation report(s) <br /> AQUIFLOW® <br /> Search Radius 2 000 Miles <br /> EDR.has developed the AQUIFLOW Information System to provide data on the general direction of groundwater <br /> flow at specific points EDR has reviewed reports submitted by environmental professionals to regulatory <br /> authorities at select sites and has extracted the date of the report,groundwater flow direction as determined <br />' hydrogeologically,and the depth to water table <br /> LOCATION GENERAL DIRECTION <br /> MAP ID FROM TP GROUNDWATER FLOW <br /> Not Reported <br />�. GROUNDWATER FLOW VELOCITY INFORMATION <br /> Groundwater flow velocity information for a particular site is best determined by a qualified environmental professional <br /> using site specific geologic and sod 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 sod <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 sods <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 /> ROCK STRATIGRAPHIC UNIT GEOLOGIC AGE IDENTIFICATION <br /> Era Cenozoic Category Stratifed Sequence <br />' System Quaternary <br /> Series Quaternary <br /> Code Q (decoded above as Era System&Senes) <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)Sod Conservation Service (SCS)leads the National Cooperative Sod <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 sail 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 /> The following information is based on Sod Conservation Service STATSGO data <br /> 07996 Site-spea6c hydtlropet"a,al data gathered by CERCLIS Alerts Inc Bainbridge Island WA Alt rights reserved AA of the infan ahand opnnns presented are those of the aced EPA report(s)which were completed under <br /> a Gomprehenom Enm—mentat Response Cumpensalmn and Liability Ininrmabon System(CFACLIS)in-stigahon <br /> TC945756 4s Page A-3 <br />