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M-07.- <br /> v <br /> The suggested pattern of test holes is shown on <br /> Figures a and 9. <br /> 2, 8 auger holes be drilled and sampled around the <br /> tank excavation area. The holes ghould be drilled to <br /> about 12 feet below Ground level and samples col- <br /> lected at -21 , --7' and -12' . The samples should be <br /> tested as noted in Part 1 above , <br /> 3. At least one of the holes should be drilled deep <br /> enough to penetrate groundwater to verify its depth. <br /> The locations of the test holes were selected to delineate <br /> the direction of any contamination plume and to determir-a if <br /> contaminants penetrated to ground water, which is believed <br /> to be about' --12'gl . <br /> If contaminants are found in any of the test holes, then <br /> additional borings will be required to further delineate the <br /> contamination extent. If contaminants are found in the sam- <br /> ples from -12' , which is at or near the groundwater table, <br /> then locations for test wells will have to be chosen, wells <br /> bored, completed, water levels and nater samples taken and <br /> the water samples tested for contaminants. The activities <br /> described in this paragraph would be the subject of either <br /> an addend'am to this report or a separate report which would <br /> complete a Site Assessment Report (SAP) . <br /> If the shallow auger device that is under consideration for <br /> use does not appear to be adequate for the job, then a con- <br /> ventional flighted auger, split spoon sampler, geotechnical <br /> type rig will be used. <br /> Prepared by: - <br /> Wm. J. Hunter & Associates <br /> �` ;\"x'11 <br /> 'Ct:_ • '!� 1 : <br /> Dennis R. Allen, Associate <br /> May 1, 1990 or. <br /> A/a _ <br /> Attachments <br /> Figures <br /> 8 <br /> J <br />