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January 23,2020 <br />Page2 <br />Project Number 21 622-20 <br />Laboratorv/Field Testinq <br />The relative compaction was determined by Sand Cone Method (ASTM: D1556) and by <br />the Drive Tube Method (ASTM: D2937). The maximum density of the fill soils was <br />obtained by the laboratory standard (ASTM: D1557) and results are shown on Table l. <br />Tests were performed a minimum of every 500 cubic yards placed and every two feet in <br />depth of lill placed. A summary of the compaction tests of the backfill operations is given <br />in Table ll with locations shown on the accompanying plan- <br />Limitations <br />It should be noted that our work does not warrant or guarantee that the contractor <br />responsible for each phase of the project has performed his work in accordance with the <br />project specifications. <br />we appreciate this opportunity to be of service to you. lf you have any further questions, <br />please do not hesitate to contacl the undersigned. <br />Respectfully submitted, <br />NORCAL ENGINEERI//o I U <br />No. <br />Keith D. Tucker <br />Project Engineer <br />R.G.E. 841 <br />12t3112020 *Mike A. Barone <br />Project Manager <br />CH <br />OF <br />'A <br />l\t <br />NorCal Engineering <br />A"