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i December 4, 2006 NOA Project Number: E06150A 6. 3.4 Past Off-Site Sources of Contamination No above-or below-ground potential or known sources of contamination to the subject property were identified from past uses of surrounding properties,except for the following.- Surrounding ollowing:Surrounding properties have been used for agriculture in the past; agricultural chemicals may have been applied to these properties. —" ` 3.5 Current Off-Site Sources of Contamination No above-or below-ground potential or known sources of contamination to the subject property were identified from current uses of the surrounding properties,except for the following: �— • Surrounding properties are used for agriculture;agricultural chemicals may be applied to these ` properties. 4.0 EVALUATION OF IDENTIFIED CONTAMINATION SOURCES Agricultural chemical residues may remain on the property. No evidence was found, however, to indicate that the chemicals were applied inappropriately. The above-ground storage tank is not within a secondary containment area. Any and all leaks could potentially impact the soil. I Septic systems may be used for inappropriate disposal of hazardous substances. If the septic system serving the milk barn has not been property abandoned,it may serve as a contaminant pathway on the Lsubject property. 5.0 CONCLUSIONS AND RECOMMENDATIONS Given the historical uses of agricultural chemicals and petroleum products on the subject property, meaningful conclusions regarding the presence or extent of such material cannot be determined without Lsoil sampling and analysis. Such sampling and analysis is especially warranted in the conversion of agricultural land into residential use, as may be the case for this property. ` The stained soil and leaking drum should be removed from the property and properly disposed in accordance with federal, state,and local regulations. The tires and other surface debris in and around the western canal should be removed and appropriately disposed. it If the above-ground storage tank is to remain in use it should be placed within appropriate secondary containment. Any oil or chemical drums to remain on the property should be placed is secondary I to containment, 9 6. '404 he