4403 RIVERFRONT BLVD 2018-02-21 - Laserfiche WebLink

� r 56 lob ac0 C DESIGNuz FIELD REPORT r' 1 of 3) Project Name: Everett River Front-Simpson Report: 012 GeoDesign#: Polygon-127-03 Date: 12/08/2016 Reports with Unresolved Nonconformance Issues: Permit: PW 1505-005 Nick Abdelnour(Polygon) Randy Allen(City of Everett) Weather: Clear, 30's Ron Bowen(Polygon) Eddy Stevens(Polygon) Arrival/Departure: 1100/1130 Distribution: - - - — - Doug Ross(Polygon) ( Kirk Keck(City of Everett) Paul McKee(City of Everett) Dave Foster(City of Everett) Prepared By: Ben Weinberg, E.I.T. ❑ Attachments: m Site Plan(s) m Density Test Summary Signature: ---- -- - Installation Records ❑ Other Reviewed By: 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 Lot 136 and 139. SUMMARY of OBSERVATIONS: Lot 139: On 12/6/16, GeoDesign identified areas of Lot 139 (Center 1/3) which required approximately 1 to 1.5 feet of over-excavation down to firm and unyielding soils. Today, GeoDesign noted that the foundation excavation subcontractor had lined the over-excavated area with a nonwoven geotextile material and backfilled the area with a 2-inch clean crushed railroad ballast material compacted into a firm and unyielding mass. In-place density tests taken on 12/6/16 indicated that the exposed material for the footing subgrade and over-excavated area had been compacted to greater than 95%of its maximum dry density as determined by a Modified Proctor analysis. It is the opinion of GeoDesign that the exposed footing subgrade 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. Lot 136: Upon arrival, GeoDesign noted that the foundation excavation subcontractor had completed digging the footing and crawl space area for Lot 136. GeoDesign noted that the exposed footing subgrade generally consisted of a gray-brown silty SAND (f-m) with gravel which could be penetrated less than 2 inches using a 1/2 inch diameter soil probe. Relative compaction of the exposed subgrade soils were tested using a Troxler Moisture-Density gauge. In-place density tests indicated that the material had been compacted to greater than 95%of its maximum dry density as determined by a Modified Proctor analysis. It is the opinion of GeoDesign that the exposed footing subgrade 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 can be found in the attached Figure 1 and Nuclear Density Gauge Data. John Feltner with Polygon was notified of our observations prior to our departure from the site. 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 DRAFr 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 1 Seattle,WA 98133 1 206.838.9900 2502 Jefferson Avenue I Tacoma,WA 98402 1 253.203.0095