1001 W CASINO RD BASE FILE 2018-01-01 MF Import

excavation operationa ao that the underlying eoils are not softened. if dieturbance occura, it may be neceeeary to remove the aoftened aedimente and brinq the area to qrade with atructural fill ae diecussed under 9ection 7.0, 3tructural Fill. 7_0 3TRUCTUR�L FILL Where etructural fill is planned, the following recommendationa ehould be followed. After etrippinq and overexcavation has been performed to the satiefaction of the Geotechnical Engineer / Engineering Geoloqiat, the upper 12 inchee of expoaed ground ehould be compacted to 90 percent of the Modified Proctor Maximum Deneity ueing ASTM:D 1557 as the atandard. If the eubgrade containe too much moiature, adequate recompaction may be difficult or impoesible to obtain and ahould probably not be attempted . In lieu of recompaction, the area to receive fill ehould be blanketed with free-draining gravel , waehed rock, or quarry spalla to act as a capillary break betxeen the new fill and the wet aubqrade. Where the expoaed ground remaine eoft and further overexcavation ie impractical , placement of an enqineering filter fabric may be neceseary to prevent contamination of the free-draining layer by ailt migration from below. After recompaction of the exposed ground ie tested and approved, or a free-draining base course is laid, etructural fill may be placed to attain deaired grades . 3tructural fill ie defined as soil acceptable to the Geotechnical Engineer, placed in 8 inch looee lifta uith each lift being compacted to 95 percent of the Modified Proctor Maximum Deneity using ASTM:D 1557 as the standard. The contractor ahould note that any proposed fill soils must be evaluated by Aaeociated Earth 3ciences, Inc. prior to their uae in fills. This uould require that we have a sample of the material 96 houra in advance to determine ita characteriatica and field compaction etandard. 3oila in which the amount of fine-grained material (emaller than No. 200 sieve) ie greater than approximately 5 percent ahould be coneidered moiature-eeneitive. Uee of moisture- aensitive aoil in etructural fille ahould be limited to favorable dry weather conditiona. The onaite soila were above their optimum • moiature content at the time of our atudy. Consequently, the oneite, non-organic eoils may require drying before they would be suitable for uae in etructural fille . Organic soils are not auitable for uee in fills but may be uaed in landacaping. If fill is placed durinq wet weather, or if proper compaction cannot be obtained, a aelect import material conaietinq of a clean, free- draininq gravel and/or sand ehould be uaed. Free-draining fill coneiata of non-organic soil with the amount of fine-grained material limited to 5 percent by weight when meaeured on the minus No. 9 aieve fraction. A repreaentative from our firm should inepect the etripped aubgrade and be present durinq placement of etructural fill to obaerve the uork and perform a repreaentative number of in-place denaity teste. 7 �