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HR Green, Inc. <br />Project B2204225 <br />October 3, 2022 <br />Page 6 <br /> <br /> <br />B.3. Groundwater <br /> <br />We did not observe groundwater while performing our borings. Groundwater may take days or longer to <br />reach equilibrium in the boreholes and we immediately backfilled the boreholes, in accordance with our <br />scope of work. If the project team identifies a need for more accurate determination of groundwater <br />depth, we can install piezometers. Project planning should anticipate seasonal and annual fluctuations of <br />groundwater. <br /> <br />B.4. Laboratory Test Results <br /> <br />We performed geotechnical laboratory tests in general accordance with ASTM International (ASTM) <br />standards. <br /> <br />B.4.a. Moisture Contents <br />We performed moisture contest testing in general accordance with ASTM D2216 on selected penetration <br />samples. The moisture content of the soils tested varied from approximately 12 to 25 percent, indicating <br />that the materials were likely near the probable optimum moisture content. The Log of Boring sheets list <br />the results of moisture content tests in the “MC” column. <br /> <br />B.4.b. Percent Passing the #200 Sieve Tests <br />We performed tests to evaluate the percent of particles passing the #200 sieve (P200) (per ASTM D1140) <br />to aid in classification. The results of these tests indicated the soils tested had P200s ranging from 37 to <br />46 percent. The Log of Boring sheets list the results of P200 tests in the “Tests or Remarks” column. <br /> <br />B.4.a. Organic Content <br />We performed an organic content (OC) test (per ASTM D2974) on a selected sample to determine the <br />reusability of the material for structure support and pavement design. The organic content of the <br />material tested was about 2 percent. The Log of Boring sheets in the Appendix show the results of the <br />organic content tests in the “Tests or Remarks” column. <br /> <br /> <br />39