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KLEINFELDER <br /> middle third of the pile had TPH concentration of 120 mg/kg, and the <br /> samples composited from the southern third of the pile had a TPH <br /> concentration of 2,300 mg/kg. Based on the results of the PID screening <br /> { and chemical analyses, the three composite samples appear to be <br /> f ti <br /> representative of the soil pile TPH concentrations. <br /> The northern two—thirds of the soil pile, or approximately 66 cubic yards, <br /> j_. do not appear to require any remediation. This soil can be disposed of at <br /> a local landfill and be used as cover material. The southern third or <br /> approximately 33 yards will require either disposal at an appropriate <br /> landfill or aeration onsite. <br /> i <br /> According to San Joaquin County Air Pollution Control District guidelines, <br /> soil with a TPH concentration of 2,000 to 3,000 mg/kg can be aerated at a <br /> ldrate of 15 cubic yards a day. The 33 cubic yards of contaminated soil can <br /> § be aerated onsite' at a rate of 1S cubic yards. P Y Per day until the <br /> ! concentrations are, below specified levels or below 1,000. mg/kg TPH. Once <br /> the soil is below 1,000 mg/kg TPH, the soil can be transported and aerated <br /> at a local landfill with Regional Water Quality Control Board approval. <br /> One hundred cubic yards of soil were excavated to uncover and remove the <br /> i� <br /> fuel: tanks.' _ At the time of the tank removal, soil characterization was <br /> i ' riot requested by the SJLHD. Additional contamination may be present in <br /> the. unsaturated soil beneath the removed pump. island area south of the <br /> rK, excavation. Additional soil may need to be removed before new tanks can <br /> bta installed Prior to initiating any additional soil removal at the. <br /> } ' site, the disposition of the stockpile soil will need to be determined. I <br /> ne Customer Company .wi.l1 need to review the disposal- option available. <br /> !� 5.3 ' SITE RESTORATION I <br /> ! _ <br /> r <br /> At this time the excavation is open and secured with temporary fencing, i f . <br /> Customer <br /> r CoPanY would like to eliminate the open excavation aThe s soon <br /> as possible. <br /> I: <br /> Lj <br /> 97--88-=502 11 <br /> i <br />