4414 RIVERFRONT BLVD 2018-03-13 - Laserfiche WebLink

Ci o4yo Yi)11 .4 cL EO S Z FIELD REPO_ Project Name: Everett River Front-Simpson Report:008 GeoDesign#: Polygon-127-03 Date: 11/18/2016 Reports with Unresolved Nonconformance Issues: Permit: PW1505-005 Nick Abdelnour(Polygon) Randy Allen(City of Everett) Weather:Clear,40's Ron Bowen(Polygon) Eddy Stevens(Polygon) Arrival/Departure: 0745/1545 Distribution: I. m — Doug Ross(Polygon) Kirk Keck(City of Everett) Paul McKee(City of Everett) t Dave Foster(City of Everett) Prepared By: Ben Weinberg, E.I.T. Attachments m Site Plan(s) _ ® Density Test Summary _Signature: Liµinstallation Records O Other Reviewed By: 7'.z PURPOSE of VISIT:GeoDesign representative, Benjamin Weinberg,was on-site part time at the request of John Feltner with Polygon to observe the foundation subgrade for Lots 121 and 122. SUMMARY of OBSERVATIONS: Lot 121: Today, GeoDesign observed the exposed foundation subgrade for Lot 121;the foundation and crawl space excavation had been completed prior to our arrival on-site. The exposed foundation subgrade consisted of a gray silty SAND with gravel. Penetration depths encountered using a 1/2 inch diameter soil probe were generally less than 2 inches. Relative compaction of relatively undisturbed exposed foundation subgrade material was tested using a Troxler Moisture-Density gauge. In-place density tests indicated that the exposed foundation subgrade material had been compacted to greater than 95%of its maximum dry density as determined by a Modified Proctor analysis. GeoDesign noted scattered surficial pockets of approximately 3 inches of material which were saturated and exhibited yielding underfoot. The precise footing locations were not marked out while we were on-site. GeoDesign recommends that any surficially loose and saturated material be removed from the base of the foundation areas prior to the placement of concrete. isidielaariat Today,GeoDesign observed the exposed foundation subgrade for Lot 122;the foundation and crawl space excavation had been completed prior to our arrival on-site. Previously,GeoDesign recommended the over-excavation of the west half of the foundation area down to firm and unyielding material,which had been completed prior to our arrival on-site(1 foot). The contractor lined the base of the excavation with a standard nonwoven geotextile and intends to backfill the area with 2-inch clean crushed railroad ballast compacted into a firm and unyielding mass. The exposed foundation subgrade consisted of a gray silty SAND with gravel. Penetration depths encountered using a 1/2 inch diameter soil probe were generally less than 2 inches. Relative compaction of the exposed foundation subgrade material was tested using a Troxler Moisture-Density gauge. In-place density tests indicated that the exposed foundation subgrade material had been compacted to greater than 95%of its maximum dry density as determined by a Modified Proctor analysis. GeoDesign noted scattered surficial pockets of approximately 3 inches of material which were saturated and exhibited yielding underfoot. The precise footing locations were not marked out while we were on-site. GeoDesign recommends that any surficially loose and saturated material be removed from the base of the foundation areas prior to the placement of concrete. A summary of our observations can be found in the attached Figure 1 and Nuclear Density Gauge Data. The client and concrete contractor were notified of our observations prior to our departure from the site today. This report presents opinions formed as a result of our observation of activities relating to geotechnical engineering or environmental services.We rely on the contractor to comply with the plans and specifications throughout the duration of the project Irrespective of the presence of our representative.Our work does not include supervision or direction of the contractor,the contractors employees or agents.Our firm is not responsible for site safety.This field report is a DRAFT representation of our field observations,testing,and preliminary recommendations.The report can only be considered final upon review of the GeoDesign project manager,as indicated by initials in the"Reviewed By'section. 10700 Meridian Avenue North,Suite 402 I Seattle,WA 98133 I 206.838.9900 2502 Jefferson Avenue I Tacoma,WA 98402 I 253.203.0095