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March 31, 2005 <br /> NOA Project Number. E05039A <br /> L4.0 EVALUATION OF IDENTIFIED CONTAMINATION SOURCES <br /> L Agricultural chemical residues may remain on the property. No evidence was found, however, to <br /> indicate that the chemicals were applied inappropriately. <br /> L The tanks located on the adjacent property appeared to be in good condition and are located on <br /> platforms above the gravel driveway. Due to their nature and/or distance from the subject property, <br /> the adjacent tanks do not appear likely to cause an environmental impact to the subject property at this <br /> L time. <br /> A 500-gallon underground gasoline storage tank and two above-ground fuel storage tanks were located <br /> ` on the property in the past According to Mr.Bryan Hofmann,one of the current owners and son of <br /> }r the previous owners of the property,the tanks were removed aroundl980. No soil staining was noted <br /> where the above-ground storage tanks had been located. The depth to groundwater is approximately <br /> 70 feet below ground surface"in the area of the subject property, and the subsoil consists of a sandy <br /> clay loam 17 about 25 inches thick. <br /> L5.0 CONCLUSIONS AND RECOMMENDATIONS <br /> Given the historical uses of agricultural chemicals on the subject property, meaningful conclusions <br /> L regarding the presence or extent of such material cannot be determined without soil sampling and <br /> analysis. <br /> Given the use of an underground storage tank on the subject property in the past, meaningful <br /> conclusions regarding the presence or extent of gasoline,diesel,or other petroleum products cannot be <br /> determined without soil sampling and analysis. <br /> LShould new domestic water wells be developed on the subject property,EHD should be contacted for <br /> direction regarding the potential for impacts to groundwater from the agricultural history of the <br /> Lproperty and vicinity. <br /> 6.0 LIMITATIONS <br /> LThis report was compiled as a Surface/Subsurface Contamination Report for the subject property. This <br /> report contains information and data provided to NOA by several sources. NOA in no way warrants <br /> Lthe accuracy or completeness of the information provided to this investigation by those sources. <br /> L 16 San Joaquin County Flood Control and Water Conservation District,Lines of Equal Elevation of <br /> Groundwater Maps,Spring 1999 and Spring 2003. <br /> L17 Soil Survey of San Joaquin County,California,United States Department of Agriculture,Soil Conservation <br /> Service,October 1992. <br /> L11 <br /> L <br />