4326 CRESCENT AVE 2025-07-14 - Laserfiche WebLink

organics that it will.not be suitable for support of structural elements. Prior to construction these unsuitable soils should be removed from under new developnic ilt areas. Once clearing;and stripping operations are corhplete, out and fill operations can be initiated to establish desired grades. In.order to achieve prober compaction of structural fill, and to provide adequato foundation and floor slab support, the native subgrade must be in a stable condition. Prior to placing structural fill,and to prepare the foundation subgrade,all.exposed surfaces.should be compacted with heavy vibratory compaction equipment to determine if any isolated soft and yielding-areas are present. If excessively soft or yielding areas Are present,and cannot be stabilized in place by compaction, they, should be cut to firm bearing soil and filled to grade with structural.fill. If the depth to remove the unsuitable soil is excessive, using a geote.ttile fabric can be considered, such as Mimf! UP270 or an approved equivalcnt, in conjunction with stroctural fill. In general, a rnini(num of 18-inches of clean,granular structurat till over the t eotextile fabric-should t>stabli,h a stable bearing surface. A representative of Ages Engineering, LLC should observe the foundation subg;rade compaction operations to verify that stable subgrades are-achieved for support of structural elements. I Our study indicates the native surface soils encountered at the site contain a s ifl~tcient enough. percentage of fine,% (silt and clay-$I= particles) -that will lake them diffk(di to compact as structural .fill when too wet, .Accordingly, the ability to use the soils front site excavations as structural fill will depend oil their i (sture content-and the prevailing weather conditions at th tw e r: time of construction. I.f'grading activities are planned during.the wet winter months, or the oil- site soils beconle. too wet to achieve adequate compaction, the owner should be prepared to import a wet-wcathcr structural till. For wet weather structural fell, we reconl.uicnd importing, a G granular soil that meets the fallowing gradation requirements: U.S.Sieve.Size — _ Percent.Passin G inches 100 No.4 75_maximum. No,204 � 5 xi3axiniurir� 'Hasw on the:'.inch 11M¢1K7n Prior to use, Ages En&ccring,LLC. should examine and test all materials to W imported to file site:for use as 4tAlOural fill. 5tructuthl fill should be placed in uniform loose layers not exceeding 12 inches and compacted to a tnininaurit of 9S percent of the soils' laboratory maximum dry density a:► determined by American Society for Testing and Materials (ASTM) Test Designation D-1557 (MO 'di Proctor). The moisture CQi1tC'nt.Af tllC soil tit tilt:tinle.ofcornphCllo(1 should be Within two percent. of Its optimum, as determined by this sane ASTM standard. In non-strtictui l areas, the clegree of conipaetion can be.reduced to 90 percent. s Ages t:ngincering,LLC Pop 7 253-845-7000 i