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L <br /> LDecember 2, 2005 <br /> NOA Project Number. E05139A <br /> LBased on the "no further action" determinations by the regulatory agencies for the two leaking <br /> _ underground storage tank cases within one-quarter mile,these cases are considered unlikely to impact <br /> Lthe subject property at this time. <br /> _ If water wells are not properly operated and maintained,they can serve as contamination conduits to <br /> L groundwater. Septic systems may be used for inappropriate disposal of hazardous substances. In this <br /> case,no evidence was encountered to suggest that wells or septic systems may be contaminant pathways <br /> on the subject property or vicinity. <br /> L5.0 CONCLUSIONS AND RECOMMENDATIONS <br /> L Given the historical uses of agricultural chemicals and petroleum products on the subject property, <br /> meaningful conclusions regarding the presence or extent of such material cannot be determined without <br /> soil sampling and analysis. Such sampling and analysis is especially warranted in the conversion of <br /> Lagricultural land into residential use. <br /> If the property owner is interested in determining the quality of on-site drinking water, EHD should <br /> be contacted for direction regarding the potential for impacts to groundwater from the agricultural <br /> L history of the property and vicinity. <br /> 4 If the property owner or the EHD are concerned about the potential for contamination to remain at <br /> 1.. the site of the former underground storage tank on the property,further inves tion may be conducted <br /> into the matter. <br /> LIf the property owner or the EHD are concerned about the potential for((((elevated levels of metals in the <br /> surface soils south of the irrigation canal as a result of metal debris storage at that location,soil samples <br /> Lmay be collected and analyzed. <br /> If the existing structures are to be renovated or demolished, a survey to detect lead-based paints and <br /> j asbestos-containing materials should be conducted prior to any such activities. <br /> L <br /> Any wells or septic systems identified which will not remain in use should be abandoned under EHD <br /> L oversight. Any additional infrastructure or buried debris that may be encountered during site grading <br /> or development should be removed and disposed of in accordance with all applicable regulations. <br /> As the site is developed, any stained soil or sources of contamination identified, including those <br /> L identified ins 3, should be characterized and properly disposed in accordance with federal <br /> state,and local r tions. <br /> L <br /> A <br /> V <br /> 12 <br /> L <br /> L <br />