2026 GRAND AVE 2016-01-01 MF Import

Subsurfcce Exploration and ?0?6 Grand Avenue Georechnical Engineenng Report 6verert 1Vasltin¢ron Design Recommendationt 7 ] Temporarv Cut Slopes j It is anticipated that building excavation will be close to property lines. Therefore, temporary cut slopes will not be feasible along die north, south, west, and east properry lines. Temporary or permanent shoring will be necessary to establish desired foundation grades, and protect existing structures and utilities. Excavation wi:l fikely encounter ground water seepa;es at varying depths across the site. AES[ should be consulted to provide temporary or permanent shoring recommendations once buitding desi2n plans have been created. 8.0 STRUCTURAL FILL The piacement of structural fill is not anticipated for this project. However, if the project design changes or conditions warrant, the following recommendations should be foUowed. All references to structural fill in this r�port refer to subgrade preparation, fill rype, placement, and compaction of materials as discussed in this section. If a percentage of compaction is specified under another section of this report, the value eiven in that section should be used. Structural fill is defined as non-organic soil, a=ceptable to the geotechnicai engineer, placed in maximum 8-inch loose lifts, with each lift being compacted to at least 95 percent of the modified Proctor mazimum densiry using ASTM:D 1557 as the standard. The contractor should note that any proposed fill soils must be evaluated by AESI prior to their use in filis. This �vould require that we have a sample of die materiai 48 hours in advance of filling activities to perform a Proctor test and determine its field compaction standard. Soils in which the amount of fine-grained material (smaller than ido. 2Q0 sieve) is greater than approximately 5 perce�.c (measured on the minus No. 4 sieve size) should be consid�red moisture-sensitive. Use of mois[ure-sensitive soils i❑ structural f Ils should be limited to favorable dry weather and dry subgrade conditions. The on-site soils generally contained trace w moderate amounts of silt and are considered slightly moisture tolerant. The use of on-site excavated soils for structural fill will likely be suitable excepc durine and immediately following �vet weather. A representatice from our firm should inspect die s[ripped subgr�de and be present during ptacement of structural fill to observe thc work and perform a representative number of in- place densiry tests. In tl�is �vaa, the adequacy of the earthwork may be evaluated as filling ;�rogresses, and any problem areas may be corrected at that time. It is important to understand that taking random compaction tests on a part-time basis will not assure uniformity or acceptable performance of a fill. As such. �ce ar� a�ailable to aid the o��ner in developine a suitable monitorine and testine frequenc}�. �ime 1 g �ppp E XH I B I T # �� ASSOCIATED EARTH SCfENCES INC. l.'.S/da-KEQ73/9G1-IIJ.p�da'.b'P7'µ�ti PAGE�F/� PageB