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R&B Trucking <br /> Project No.01-37.1.1 <br /> March 27,1990 <br /> Page 7 <br /> the environmental health of the property. It is recommended that Mr. Barenchi scoop <br /> the worst of these areas up and replace them with clean soil. <br /> The air photographs search did not reveal any other areas of concern or potential <br /> degradation spots. Evidence suggests that R&B Trucking operated with <br /> environmentally safe business practices and has successfully avoided adversely <br /> impacting the property. <br /> 6.0 CONCLUSION AND RECOMMENDATIONS <br /> The analytical data generated by two water sampling events did not indicate <br /> ` detectable levels of contamination. This information shows that no petroleum <br /> hydrocarbons are present in the shallow ground water beneath the former underground <br /> storage tank area. <br /> From the soil samples taken during tank closure,only three showed significant levels of <br /> contamination. The subsequent excavation of this contaminated soil appears to have <br /> removed the potential for shallow ground water contamination. The clay sediment just <br /> below the tanks appear to have retained the hydrocarbons and did not contribute to a <br /> further spread from the immediate area. <br /> Based on the information collected for this report,we recommend that no further action <br /> be performed at this site to study the shallow ground water beneath the former <br /> underground storage tank area. Based on visual observations,we see no need for further <br /> action concerning the remaining portions of the property. Therefore,GTI recommends <br /> that the three monitoring wells be properly abandoned according to San Joaquin County <br /> regulations. <br />