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Augusl 18. 2004 <br />Mr. .lim l homas <br />13clvcJcre Lots 32 and 33 <br />I.�CA .tob Na 4A088 <br />Pagc I6 <br />as recommended in the SITE DItAINAGG scclion of this report, should also be provided for <br />luundalion and relaining w�lls. <br />SI,Al3-ON-CKADI? fLOORS <br />Slab-on-gradc iloors, if uscd, should be placed on f-m subgrade prepared as ouUined in the SITE <br />PREPARA7lON AND GBN�RAL GARTfIWORK and thc S"1'RUCTURAL fILL seclions of <br />lhis reporL Where moisture conlrol is critical, the slab-on-grade floors should be placed on a <br />capillary break which is in turn placed on the compacled subgrade. The capillary break should <br />consisi of a minimum four-inch-thick layer of frec-draining gravel oP crushed rock containing no <br />more Uian 5% by weight passing the No. 4 sievc. A vapor barrier, such as a G-mil plastic <br />rnembrane, may be placed over the capillary break, as required, to keep moisture from migrating <br />upwards. <br />SITI�; URAINAGI? <br />l:xcavaliun for l3uilJink I�oolprinls <br />We do not anticip�te ihe excavalion lor th� building �uotprints to encounter groundwater. If <br />encountered, the holtom of excav:!:�on slwuld be slope� and diiches excavaled along the bases of <br />ihc cut slopcs lo dirccl collcctcd groundwatcr inlo a sump pit from which walcr can bc pmnped <br />oul uf lhc building footprints into a ncarby slonn scwcr. A laycr of 2-inch crushed rock should <br />bc plxcd ovcr lirnt undisturbed subgradc soils unJer lootings and on-grade slabs, as required, to <br />�rotcct thc sails froin dislurhancc by construction Uaftic. lliis crushcd rock base should bc built <br />to a fe�v inches above groundwaler Icvcl, but not Iess tlinn 4 inches thick. The crush rock base <br />should bc compacicd in 12-inch lifts lo a nomyiclding statc witl'� a vibralory mcchanical <br />cum�;iclor. <br />LI U& ASSOCtATI:S, INC. 11� Ic ' <br />� --, <br />