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U <br /> 1.2 Scope of Work <br /> The planned future activities at the site includes the following tasks be <br /> i <br /> performed: <br /> Mobilization of all necessary personnel, equipment, and supplies to perform <br /> I <br /> the work. <br />' 3 <br /> • Prior to excavation, Underground Service Alert (USA) will be contacted to <br />€ locate underground and overhead utility lines including sewer, water; and <br /> electrical, and phone that may exist in the areas where excavation will occur. <br /> —Overexcavation and sail-screening to-detrriiir—�e ver tirdl-arli� lrtral extent�of <br /> the soil contamination. <br /> I <br /> I Collection of soil samples. <br /> i <br /> 1 <br /> 1.3 Overe'xcavation and Field Screening <br /> 1 <br /> Overexcavation of the UST site will be accomplished using a wheeled backhoe. <br /> All excavated soil will be placed on visquine and stored in a separate <br /> contaminated soil stockpile. The sides and bottom of the hole will be excavated <br /> i <br /> at one (1) foot intervals. The in-place soil 'at- the sides and bottom of the <br /> excavation will be field screened. Field screening will consist of both visual <br /> inspection and field screening techniques. A photoionization detector (PID) will <br /> be used as a semi-quantitative field screening method. During excavation soils <br /> that have a strong organic or chemical odor, are visibly stained, or display a high <br /> organic vapor reading on the PID (greater than 10 ppm) will be considered <br /> contaminated. Soils with these characteristics are most likely to be <br /> contaminated with hydrocarbons. Overexcavation will continue at one-foot <br /> intervals until no suspected contamination is present. Final determination of <br /> contamination will be based on sample analysis. <br /> 2of3 <br /> t <br /> I <br />