4329 RIVERFRONT BLVD 2019-03-14 - Laserfiche WebLink

GzEO FIELD REPORT 1 of 3 Project Name: Everett River Front-Simpson Report: 103 GeoDesign#: Polygon-127-03 Date: 4/5/2018 Reports with Unresolved Nonconformance Issues: Permit: PW1505-005 ?y=XFF �\J4l.Y�NVlx max • . .v..,."....... wvw ' z�aWt¢w�otta \�\ . ��mi.� Dev12.i�o.e.�Yb�ub..U Nick Abdelnour(Polygon) Randy Allen(City of Everett) . Weather: Cloudy, 50's Ron Bowen(Polygon) Eddy Stevens(Polygon) Arrival/Departure: 1515/1600 Distribution: Doug Ross(Polygon) Kirk Keck(City of Everett) Paul McKee(City of Everett) Dave Foster(City of Everett) Prepared By: Ben Weinberg, EIT Attachments El Site Pian(s) m Density Test Summary Signature: ❑ Installation Records 0 Other Reviewed By: ru e I PURPOSE of VISIT: GeoDesign representative, Ben Weinberg, was on-site part time at the request of Craig with DDS to observe foundation subgrade for Lots 144 and 145. SUMMARY OF OBSERVATIONS: Lot 145: Today, GeoDesign noted that DDS had completed excavation of the footing and crawl space area for Lot 145. The exposed footing subgrade soil generally consisted of a gray-brown to brown silty SAND with gravel that could be probed less than 2 inches using a 1/2 inch diameter soil probe. Relative compaction of the footing subgrade soils was tested using a Troxler Moisture-Density gauge; in-place density tests indicated that 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 foundation subgrade observed today is currently suitable for support of the intended structure. GeoDesign recommends that any surficially loose and saturated material that may be generated be removed from the base of foundation areas prior to the placement of concrete. Lot 144: Today, GeoDesign noted that DDS was in the process of excavating the footing and crawl space area for Lot 144. The soil near the exposed footing subgrade area on the east half of the lot area consisted of gray-brown silty SAND with gravel which could be probed less than 2 inches using a 1/2 inch diameter soil probe. We identified an approximately 25'x25'area on the west 1/2 of the lot area which consisted of a very loose saturated gray silty SAND with gravel and debris which could be probed 2.5 to 3.0 feet using a 1/2 inch diameter soil probe and exhibited yielding underfoot. GeoDesign notified the contractor that the identified area was unsuitable for support of the intended structure and would require removal down to firm and unyielding soil and replacement with structural fill material. Relative compaction of the footing subgrade soils was tested using a Troxler Moisture-Density gauge; in-place density tests indicated that material had been compacted to greater than 95% of its maximum dry density as determined by a Modified Proctor analysis. It is our understanding that the area on the west half of the lot will be over-excavated and backfilled tomorrow. A summary of observations and density tests taken can be found in the attached Figure 1 and Nuclear Density Gauge Data. The contractor was 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 speafications 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 (� 1