3314 31ST DR 2021-05-17 - Laserfiche WebLink

Laii1DESIGM FIELD REPORT 1 of Project Name: , Everett River Front- Eclipse (3) Report: 005 GeoDesign#: ; Polygon-128-03 Date: 12/13/2016 Reports with Unresolved Nonconformance Issues: Permit: PW 1504-055 Nick Abdelnour(Polygon) Randy Allen(City of Everett) Weather:Clear, 20's Ron Bowen(Polygon) Arrival/Departure: 1300/1400 Distribution _ m.. Doug Ross(Polygon) Paul McKee(City of Everett) ; Prepared 8y: Benjamin Weinberg Attachments. 0 Site Plan(s) 0 Density Test Summary Signature: Or:— �` 7 ❑ Installation Records ❑Other Reviewed By: go PURPOSE of VISIT: GeoDesign representative, Benjamin Weinberg, was on-site at the request of Eddy Stevens with Polygon to observe placement of fill for Building 20 and foundation subgrade for Building 1. SUMMARY OF OBSERVATIONS: Building 20-Mat Foundation Fill Observation(East 1/2): Previously, GeoDeisgn noted that the foundation excavation subcontractor had placed approximately 4 inches of CSTC material as capillary break material over a 10-mil plastic sheet which was loose at the time of our site visit. Today, GeoDesign noted that the material had been compacted into a firm and unyielding mass using a standard walk-behind plate compactor. The material appeared to be suitable for support of the intended load. Building 1 -Mat Foundation Foundation Observations(South 1/2): Today, GeoDesign noted that the foundation excavation subcontractor was in the process of digging the mat foundation area for the south half of Building 1. GeoDesign noted that the foundation subgrade consisted of a mixture of cement treated backfill material observed during ground improvement trench installation and a gray silty SAND(f-m)with gravel. The cement treated material encountered could be penetrated less than 1 inch using a 1/2 inch diameter soil probe. Generally,the gray silty SAND with gravel that was encountered outside of the ground improvement trench areas could be probed less than 1-2 inches. For an area on the south perimeter of the mat foundation area, GeoDesign noted a previously excavated test pit area which had been backfilled with material tamped into place using the bucket of an excavator(-3-4 feet wide and 10 feet long);this material could be probed 2 to 3 feet. GeoDesign recommended over-excavating 3 feet of material,stabilizing the base of the excavation with quarry spells if necessary, and backfilling the area with cement treated material compacted in lifts. Today, GeoDesign observed the removal of approximately 3 feet of material from the abovementioned area. The exposed base of the excavation consisted of firm material which could be probed less than 3 inches. The over-excavated material was backfilled with cement treated material compacted in lifts. Based on our experience with the cement-treated material on-site, the backfill material should provide adequate support for the intended load. GeoDesign noted that the exposed subgrade for the thickened portions of the mat foundation excavation were currently suitable for support of the intended structure. GeoDesign noted 3 to 4 inches of surficially loose material around the edges of the non-thickened portions of the mat foundation excavation that will require removal prior to placement of the vapor barrier and capillary break material. A summary of our observations and density tests taken today can be found in the attached Figure 1 and Nuclear Density Gauge Data. 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 contractor's 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