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removal and replacement of the vegetation should be made prior to UST <br /> removals <br /> • A concrete public sidewalk is located approximately 1 foot south of UST "A" and <br /> may obstruct excavation activities. Considerations for the removal and <br /> replacement of portions of the concrete sidewalk, along with considerations to <br /> maintain public access ("foot-traffic") and safety, should be made prior to UST <br /> removals Similar considerations should be made for the cutting and patching of <br /> the concrete sidewalk during the UST fill pipe removal <br /> 5.0 CONCLUSIONS AND RECOMMENDATIONS <br /> Conclusions <br /> Analytical results indicate that soil adjacent to UST "B" has been impacted with <br /> petroleum hydrocarbons (bunker oil) at boring sample location B1 Analysis for total <br /> extractable petroleum hydrocarbon quantified as diesel (TPHd) indicate concentrations <br /> at soil sample locations B1-10', BI-15', and B1-20' of 6,200 mg/kg, 24,000 mg/kg, and <br /> 3,000 mg/kg, respectively These concentrations are above the maximum allowable <br /> concentrations that may be allowed to remain in place, as per PHS/EHD and the <br /> California Regional Quality Control Board (RWQCB) Maximum allowable <br /> concentrations of TPHd in soil, as determined by these regulatory agencies, is dependent <br /> K084023 RPT 15 <br />