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February 9, 2006 <br /> NOA Project Number: E05163A <br /> 4.0 EVALUATION OF IDENTIFIED CONTAMINATION SOURCES <br /> Agricultural chemical residues may remain on the property. No evidence was found, however, to <br /> indicate that the chemicals were applied inappropriately. <br /> The above-ground storage tank is not within a secondary containment area. Any and all leaks <br /> c could potentially impact the soil. <br /> l <br /> 5.0 CONCLUSIONS-AND RECOMMENDATIONS <br /> Given the historical uses of agricultural chemicals on the subject property, meaningful conclusions <br /> regarding the presence or extent of such material cannot be determined without soil sampling and <br /> analysis.. Such sampling and analysis is especially warranted in the conversion of agricultural land <br /> F1 into residential use. This proposed parcel division indicates a new residential structure, however <br /> farming-activities are to continue on the majority of the property. Therefore, sampling is <br /> recommended in the area of the residence prior-to building of residential structure,but after the <br /> removal of the portion of the orchard. <br /> Should the future residents of the subject property be interested in determining the quality of their <br /> F1_ drinking water, EHD should be contacted for direction regarding the potential for impacts to <br /> groundwater from the agricultural history of the property and vicinity. <br /> Because no staining was observed in the vicinity of the transformers, the transformers are not <br /> considered an environmental threat to the subject property at this time. Should the property <br /> owners or the EHD be concerned about PCB contamination from the transformer,PG&E should <br /> be contacted to test,retrofit, or replace the transformer. <br /> As the site is developed, any stained soil or sources of contamination identified should be <br /> F! characterized and properly disposed in accordance with federal, state, and local regulations. <br /> To prevent soil staining or soil contamination from the above-ground storage tank a secondary <br /> F1 containment should be placed around the tank. <br /> 6.0 LIMITATIONS <br /> This report was compiled as a Surface and Subsurface Contamination Report for the subject <br /> property. This report contains information and data provided to NOA by several sources. NOA <br /> in no way warrants the accuracy or completeness of the information provided to this investigation <br /> by those sources. <br /> ii <br /> 9 <br />