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— - - - <br /> 16 <br /> r <br /> 9i KLEIN FELDER <br /> 5 RECOMMMATIONS AND SOIL DISPOSITION <br /> I 5.1 EXCAVATION <br /> Approximately 350 to 4.00 cubic yards of soil have been additionally <br /> ` removed from the southern end of the original <br /> tank excavation. Samples <br /> ' from the perimeter of the excavations were screened with a PID. Samples <br /> t <br /> qualitatively screened show PID readings of 0 to 560 ppmv. <br /> . Qualitative field screening and confirmation sampling was conducted on the <br /> soil . remaining inthe walls of the excavation. PID readings ranged from i <br /> " 0 ppmv, at survey points 2 49 and 50 to 80 my at surve t <br /> ' ' PP y Point 6. The <br /> relatively low Pi <br /> D readings indicate the soil containing high <br /> concentrations of 'petroleum hydrocarbons has been removed. <br /> - <br /> TR <br /> To confirm the results of the PTD screening and removal of the E- <br /> '; contaminated soil, five soil samples from the <br /> walls of the final <br /> excavation were submitted for analysis. -election was based on the PID <br /> readings and surveypo int locations in the excavation. <br /> by' Location 10 had a-PID reading of 25 ppmv,- the highest value on the north,. t <br /> } <br /> east and west sides of the original tank excavation. This sample resulted <br /> in TPH'-dird BTEX concentrations below the laboratory reporting limits } - <br /> The primary area of soil removal was to the south of the excavation in the <br /> area of the original pump island. To confirm the removal of contaminated <br /> soil .from the southwest corner, two locations (47 {25 ppmv} and 49 i <br /> (0 ppmv) were screened with the PID and samples submitted for analysis. ' <br /> Both samples were below the laboratory's reporting limits for TPH and BTEX r <br /> h I <br /> f. concentrations: <br /> 102-86-638. 7 <br /> E <br /> �h <br /> r. <br />