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jr February 18,2005 <br /> NOA Project Number: E04145A <br /> L3.5 Current Off-Site Sources of Contamination <br /> No above-or below-ground potential or known sources of contamination to the subject property were <br /> Cidentified from current uses of the surrounding properties, except for the following. <br /> L A completed gas well lies approximately one-eighth of a mile to the northwest of the subject <br /> property. <br /> L <br /> • An above-ground storage tank is located at the residence to the immediate east of the southeast <br /> comer of the subject property. <br /> LSeveral agricultural chemical dispenser tanks and a discarded underground storage tank are <br /> r located at the residence to the immediate north of the northeast corner of the subject property. <br /> 4.0 EVALUATION OF IDENTIFIED CONTAMINATION SOURCES <br /> L Paraquat and other agricultural chemical residues may remain on the property. Because the property <br /> is to remain agricultural,however, and because there is no evidence that these chemicals were applied <br /> I inappropriately, the potential presence of chemical residues on the property is not considered an <br /> L environmental concern at this time. <br /> Due to their apparent age,the three pole-mounted transformers on the eastern property boundary may <br /> L contain PCB-laden mineral oil. <br /> !' The plugged and abandoned gas well on the subject property could not be located during the site visit. <br /> L This well is not anticipated to impact the subject property in the future. <br /> Because of the distance from the potential off-site sources of contamination to the subject property, <br /> L these sources are not anticipated to impact the subject property at this time. <br /> 5.0 CONCLUSIONS AND RECOMMENDATIONS <br /> L <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 /> L analysis. <br /> { The three transformers on the eastern subject property boundary should be periodically monitored for <br /> �. leakage. Should the property owners or the EHD be concerned about PCB contamination, PG&E <br /> should be contacted to test the transformer. <br /> L The oil staining around the well head at the northwest corner of the subject property should be cleaned <br /> up,and a well service should be consulted to address possible maintenance issues at the well. <br /> E <br /> L <br /> 11 <br /> L <br /> L <br />