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KLEINFELDER <br /> 6 SOIL REMEDIATION <br /> ' This section summarizes the field activities associated with the excavation of impacted soil at <br /> the T2/T3 tank removal site, collection of excavation verification and stockpile <br /> ' characterization samples, and soil aeration <br /> ' 6 1 SOIL EXCAVATION <br /> On Apnl 29 and 30, 1993 and again on May 3 and 4, 1993, W. M. Lyles Company excavated <br /> soil from the T2/T3 tank removal site Due to the maximum depth of petroleum hydrocarbon <br /> impacted soil (estimated at 33 feet below the ground surface), approximately 1,000 cubic yards <br /> ' of non-impacted soil were removed to allow access to the deeper impacted soil. <br /> Approximately 2,400 cubic yards of impacted soil were excavated to a maximum depth of <br /> approximately 34 feet below ground surface (Plate 6) <br /> Impacted soil being removed from the excavation was randomly screened with an organic <br /> rvapor analyzer equipped with a PID PID readings of soil from ground surface to a depth of <br /> approximately 12 feet below ground surface were 0 0 ppmv Below 12 feet, PTD readings <br /> ' increased to a maximum of approximately 980 ppmv at approximately 20 feet below ground <br /> surface, and then decreased to below 20 ppmv for the confirmation samples The PID <br /> readings collected with the confirmation samples are shown on Plate 6 <br /> ' 6 1 1 Excavation Venfication Sampling <br /> Ten soil samples were collected from the excavation to verify the removal of petroleum <br /> ' hydrocarbon impacted soil Five soil samples were collected on May 3, 1993, and five <br /> samples were collected on May 5, 1993. Sample No 81038 was collected from approximately <br /> ' 1 foot deeper but at the same approximate location as Sample No 81032 due to the positive <br /> results of Sample No 81032 <br /> 24-220152-DooIFR12-105 (1993) Page 12 of 18 duly 27, 1993 <br /> ' copyright 1993 KLeinfelder, Inc. <br />