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L <br /> November 18, 2005 <br /> NOA Project Number: E05144A <br /> �- /5.0 CONCLUSIONS AND RECOMMENDATIONS <br /> L Given the historical uses of agricultural chemicals and petroleum products on the subject property,and <br /> the possibility of lead based paint and ACM used in the onsite structures, meaningful conclusions <br /> rcgaxdLmg the presence or extent of cuch material cannot he determined urithont Sail Rampling and <br /> L analysis. Such sampling and analysis is especially warranted in the conversion of aericultural land into <br /> residential use. <br /> i <br /> L <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 owners <br /> L or the EHD be concerned about PCB contamination from the transformers, PG&E should be <br /> contacted to test, retrofit, or replace the transformers. <br /> L' Potential remnants of the mining operation and previous residences could be uncovered during <br /> development or farming activities. Any additional infrastructure or buried debris that may be <br /> '- encountered during site grading or development should be removed and disposed of in accordance with <br /> all applicable regulations. <br /> L Any wells or septic systems identified which will not remain in use should be abandoned under EHD <br /> oversight. <br /> L <br /> The tailings for mining activities have been placed into the mining pits and top soil has been spread over <br /> the top. The soils in the area of the mining operation have been disturbed and may settle over time. <br /> LTherefore, a geotechnical engineer should be consulted prior to construction of buildings or other <br /> engineered structures in this area. <br /> The aboveground petroleum storage tanks should be laced within a secondary containment if they are <br /> to remain on the snhiect property. <br /> V <br /> L 6.0 LIMITATIONS <br /> This report was compiled as a Surface and Subsurface Contamination Report for the subject property. <br /> L This report contains information and data provided to NOA by several sources. NOA in no way <br /> warrants the accuracy or completeness of the information provided to this investigation by those <br /> Lsources. <br /> 14 <br /> L "004 <br /> L <br />