4327 RIVERFRONT BLVD 2018-02-21 - Laserfiche WebLink

ti DESIGNuz FIELD REPORT Project Name: I Everett River Front-Simpson Report: 029 GeoDesign#: Polygon-127-03 Date: 03/01/2017 Reports with Unresolved Nonconformance Issues: Permit: P W 1505-005 Nick Abdelnour(Polygon) Randy Allen(City of Everett) Weather: Cloudy, 40's Ron Bowen(Polygon) Eddy Stevens(Polygon) Arrival/Departure: 0915/1230 Distribution: -- — ...__ Doug Ross(Polygon) Kirk Keck(City of Everett) Paul McKee(City of Everett) Dave Foster(City of Everett) Prepared By: Ben Weinberg m Site Plan(s) m Density Test Summary Signature: Attachments: — ... . _ _ _ — _ _-- ❑ Inst_ allation-Record. s ❑ Other Reviewed By: PURPOSE of VISIT: GeoDesign representative, Ben Weinberg, was on-site part time at the request of John Feltner with Polygon to observe the foundation subgrade for Lot 146. SUMMARY of OBSERVATIONS: Lot 146: Upon arrival, GeoDesign noted that the foundation excavation subcontractor had completed excavation of the footing and crawl space area for Lot 146. GeoDesign noted that the exposed foundation subgrade consisted of a brown-gray silty SAND with gravel which could generally be probed less than 1 inch using a 1/2 inch diameter soil probe. Along the north perimeter footing area, GeoDesign noted an approximately 40 feet long section which could be probed 6 inches to 1 foot which we recommended be removed down to firm and unyielding material and backfilled with a 2-4 inch recycled concrete material compacted into a firm and unyielding mass. Relative compaction of the footing subgrade material was tested using a Troxler Moisture-Density gauge; in-place density tests indicated that exposed foundation subgrade material had been compacted to greater than 95%of its maximum dry density as determined by a Modified Proctor analysis. While on-site, GeoDesign observed the foundation excavation subcontractor removed the loose material along the north perimeter footing area using a CASE CX160B and grade blade. GeoDesign noted that the exposed material approximately 6 inches below footing subgrade consisted of 2-4 inch quarry spalls mixed with a gray sand material; GeoDesign notified the subcontractor that the surficially loose and saturated material above the spalls should be removed and replaced, but that the spalls could be compacted and remain in place. After removing the loose and saturated material, GeoDesign noted that the foundation excavation subcontractor backfilled the over-excavated area with 2-4 inch recycled concrete material compacted into a firm and unyielding mass. It is the opinion of GeoDesign that the foundation subgrade area observed today is currently suitable for support of the intended structure. GeoDesign recommends that any surficially loose and saturated material be removed from the base of the footing areas prior to the placement of concrete. 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 ey'sec ion. 10700 Meridian Avenue North,Suite 402 1 Seattle,WA 98133 1 206.838.9900 2502 Jefferson Avenue I Tacoma,WA 98402 1 253.203.0095