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20 November 1995 e <br /> . AGE-NC Project No. 95-0125. s <br /> Page 4 of 5 <br /> Protection Agency, 1985). <br /> _2. Notify the PHS/EHD 48 hours prior to com ne"7'cement of any work. <br /> 3. Excavate hydrocarbon-impacted soil from the former gasoline'UST excavation using a <br /> backhoe. The approximate area to be excavatedwill be.,10 feet by 15 feet. Assuming the <br /> removal of impacted oil to a depth of approximately 8 to 10 feet, the volume of soil that will <br /> be removed will be approximately.50 cubic yards. The proposed excavation limits are <br /> illustrated in Figure 2. . <br /> 4. As excavation proceeds, monitor excavated soil for the presence of.volatile organics using <br /> a .photo-ionization detector (PAID). Soil will,be segregated-into ."clean" stockpiles and <br /> "impacted" stockpiles based upon PID measurements. <br /> 5. Stockpile,the excavated soil on plastic sheeting, p nding analytical results. Impacted soil will <br /> be stockpiled where.specified by LSD, on-site. If clean soil is excavated, it will be used to <br /> backfill the excavation upon-completion of digging: . <br /> 6. If necessary; spray the excavated soil with water to minimize the release of volatile organic ` <br /> compounds into the atmosphere. Upon completion'of excavation activities, the.removed soil <br /> will be covered with plastic sheeting,, <br /> 7. Collect'soil samples from.the floor and the gidewalls of the excavation.' Approximately 5 soil' <br /> samples will be collected. Samples will be collected from the backhoe bucket and preserved <br /> in pre-cleaned brass tubes. <br /> 8. Sea].samples with aluminum foil or Teflon sheets, cap, and store on ice for transportation to <br /> a State-certified laboratory. <br /> 9. Label and log soil samples on a chain of custody form. <br /> 10. Analyze soil samples for TPH=g and BTE&Xinl accordance with EPA methods.8015m and <br /> 8020, respectively. <br /> 4.2. EXCAVATION BACKFILLING <br /> Upon completion excavation, the former UST area will be backfilled to surface grade.with"clean". <br /> fill material. The following procedures will be perfo d: , <br /> 1. '. Importation of approximately p135 tons of cle sand (or other compactible material). <br /> 2: . Fill'material will be"tire" compacted to 90% using a,loader or backhoe. <br /> 3. A soil sample will be collected during the backfilling process: The sample will be collected <br /> for moisture density compaction testing. <br />