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M04007MT <br />4.1 Structural Fill Quality <br />It is our understanding that the proposed development may include <br />compacted structural fill. The quality of compacted structural <br />' fill will depend on the type of material used as structural fill, <br />fill lift thickness, fill moisture condition and compactive effort <br />used during construction of the structural fill. Engineering <br />' observation and testing of structural fill is essential as an aid <br />to safeguard the quality and performance of the structural fill. <br />' Testing of the structural fill normally includes tests to deter- <br />mine the grain size distribution, swell potential and moisture- <br />density relationship of the fill material to verify the material <br />' suitability for use as structural fill. As the material is placed <br />the in-place moisture content and dry density are tested to indi- <br />cate the relative compaction of the placed structural fill. We <br />' recommend that your budget include provisions for observation and <br />testing of structural fill during construction. <br />' Testing of the compacted fill material should include tests of <br />the moisture content and density of the fill material placed and <br />compacted prior to placement of additional fill material. We <br />' suggest that a reasonable number of density tests of the fill <br />material can best be determined on a site, material and constructi- <br />on basis although as a guideline we suggest one test per about each <br />' 300 to 500 square feet of each lift of fill material. Utility <br />trench backfill may need to be tested about every 100 linear feet <br />of lift of backfill. <br />5.0 LIMITATIONS <br />' It is the owner's and the owner's representatives' responsibility <br />to read this report and become familiar with the recommendations <br />' and suggestions presented. We should be contacted if any questions <br />arise concerning the geotechnical engineering aspects of this <br />_ project as a result of the information presented in this report. <br />The recommendations outlined above are based on our understanding <br />of the currently proposed construction. We are available to <br />discuss the details of our recommendations with you and revise them <br />where necessary. This geotechnical engineering report is based on <br />8 <br />~Lam6ert anD ~,s~,oociateo <br />COM8ULTIN6 GEOTEONNILAL EMGINEENB ANO <br />MATERIAL TE8TIN6 <br />