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• .` 05 October 1998 <br /> AGE-NC Project No. 98-0433 <br /> Page 2 of 4 <br /> stockpiled at the east end of the Operations/Mini-Mart building as designated as stockpile <br /> 94SP4". The new UST excavation was approximately.35 feet in length, 15 feet in width and <br /> 18 feet in depth. <br /> • Approximately 275 cubic yards of clean soil were excavated from new trenching for the <br /> upgraded dispenser system. The new trench connects the ASTs located at the south end of <br /> the property with the new dispensers..This soil was presumed"clean"and combined with the , <br /> existing stockpile SP4. The total'volume of`clean' soil in SP4 was approximately 625 cubic <br /> yards. <br /> Removal of USTs and Southern Dispenser Islands <br /> • On 01 September 1998 three USTs, four additional dispenser islands and associated product <br /> lines were.removed from the site. Approximately 350 cubic yards of impacted soil were <br /> excavated from the UST and southern:dispenser area and stockpiled on the western edge of <br /> the property. These stockpiles were designated as SP1, SP2-West and SP3. <br /> • On 01 September 1998, Grayland Environmental collected four samples from stockpile SP1, <br /> • one sample from stockpiled SP2-West and eight samples from stockpile SP3. The samples <br /> were transmited to a DTSC-certified Iaboratory and composited for analysis. <br /> • On 01 and 02 September 1998 approximately 350 cubic yards of"clean" soil from stockpile <br /> SP4 was backfilled into the former UST excavation. The "clean" soil was approved for use <br /> as backfill material by Mr. Eric Travena of the PHS-EHD., After backfilling, approximately <br /> 275 cubic yards of"clean" soil remained in stockpiled SP4. <br /> Disposal of Hydrocarbon-Impacted Soil <br /> • On 14 September 1998, approximately 350 yards (550 tons) of hydrocarbon-impacted soil <br /> was transported to and disposed at Forward Landfill. Impacted soil was stockpiled as SP 1, <br /> SP2-West, SP2-East, SP3. Approximately 150 to 175 cubic yards of impacted soil remains <br /> on the site. The impacted soil was generated from the removal of six northern fuel <br /> dispensers, associated piping and excavation of apparently hydrocarbon-impacted soils for <br /> the upgrades of the fuel system. ' <br /> • On 15 September 1998, six laboratory-composited soil samples were collected from the <br /> "clean" soil remaining on the site. Low concentrations of diesel were detected in these <br /> smaples (see Table 1). <br /> • Advanced GeoEnvironmental Inc. <br />