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June 13, 2006 <br /> NOA Project Number: E06063A <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 /> Ik <br /> Fj The area of the former onsite gas well was observed. No evidence of environmental impact was <br /> observed at the time of inspection. <br /> If water wells are not properly operated and maintained, they can serve as contamination conduits <br /> to groundwater. <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 /> F1 analysis. Such sampling and analysis is especially warranted in the conversion of agricultural land <br /> into residential use. At this time it does not appear that this is the case for this property. <br /> 1 The oil staining around the well should be cleaned and properly disposed in accordance with <br /> ' federal, state, and local regulations. <br /> The concrete debris located at the center of the subject property should be disposed appropriately. <br /> If construction is to take place in the future in the vicinity of the plugged and abandoned well on <br /> F1 the subject property, the Department of Oil, Gas, and Geothermal Resources should be contacted <br /> for direction before proceeding. <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 /> j Should the future residents of the subject property be interested in determining the quality of their <br /> k } 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 /> As the site is developed, any stained soil or sources of contamination identified, such as those <br /> i described in Section 3.3, should be characterized and properly disposed in accordance with federal, <br /> state, and local regulations. <br /> �I <br /> 1 0 <br /> g <br /> Ft <br /> :i�l <br />