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OES - Sharpe Army Depot, Iathrop <br />August 28, 1995 <br />Page -2- <br />was not encountered during the removal of TK1. At the completion of the field work, the tank <br />excavation was approximately 3 feet by 4 feet by 5 feet deep. <br />The excavated soil was stockpiled approximately 5 feet to the south of the tank excavation. <br />The soil stockpile was sampled to allow options for the fate of the soil (i.e. land disposal, aeration, <br />etc.) to be evaluated. After completion of the soil sampling, the stockpile was covered with plastic. <br />3.0 SOIL SAMPLES <br />Following the removal of the UST, one soil sample was collected from a location selected by <br />Letitia Briggs of the SJCPHS,EHD. The soil sample (1407 -Mid 5-8/14/95) was collected from below <br />where TK1 was located at the center of the floor of the excavation at approximately 5.0 feet bgs. <br />The sample was collected by driving a clean brass tube into freshly exposed soil brought to the <br />surface in a backhoe bucket. The soil sample was immediately sealed with Teflon tape, capped, <br />wrapped with duct tape, labeled, and placed in a cooler chilled with Blue Ice. <br />One soil sample (1407 -SP -8/14/95) was collected from the soil stockpile as directed by Letitia <br />Briggs of the SJCPHS,EHD. A clean brass tube was driven into the approximate center of the <br />stockpile at a depth of approximately one foot below the stockpile surface. The soil sample was <br />immediately sealed with Teflon tape, capped, wrapped with duct tape, labeled, and placed in a cooler <br />chilled with Blue Ice. The soil samples were hand delivered following chain -of -custody procedures to <br />GeoAnalytical Laboratories in Modesto, California, for analysis. <br />4.0 LABORATORY ANALYSES <br />The soil samples were analyzed for TPH-G by Method 5030/LUFT, for BTEX constituents <br />(benzene, toluene, ethyl benzenze and total xylenes) by Method 8020, for TEPH constituents <br />(kerosene, diesel and motor oil) by Method 3550/LUFT and for TTLC (total threshold limit <br />concentration) lead by Method 7420. The lab analyses were selected by Letitia Briggs of the <br />SJCPHS,EHD. The results of the laboratory analyses are presented in Table 1. Analytical methods <br />used, detection limits, and results of analyses are included in the laboratory reports, Appendix B. <br />The chain -of -custody record for the soil and groundwater samples is included in Appendix B. <br />%4 CONDOR <br />