4311 30TH DR SE 2019-01-30 - Laserfiche WebLink

GE+DESIGN FIELD REPORT 1 of 3 Project Name Everett River Front-Simpson Report 100 GeoDesign#: Polygon-127-03 Date: 3/1/2018 Reports with Unresolved Nonconformance Issues: Permit: PW1505-005 INick Abdelnour(Polygon) Randy Allen(City of Everett) Weather: Clear, 40's Ron Bowen(Polygon) i Eddy Stevens(Polygon) Arrival/Departure: 0830/0930 Distribution: -- { Doug Ross(Polygon) Kirk Keck(City of Everett) Paul McKee(City of Everett) •• Dave Foster(City of Everett) Prepared By. Ben Weinberg, EIT m Site Plan(s) m Density Test Summary Signature: Attachments: 0 Installation Records El Other a l Reviewed By: 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 154 and 157. SUMMARY OF OBSERVATIONS: Lot 154: Today, GeoDesign noted that DDS had completed excavation of the footing and crawl space area for Lot 154. The exposed footing subgrade soil generally consisted of a gray-brown to brown silty SAND with gravel that could 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. GeoDesign identified an approximately 15 feet long and 6 feet wide triangular section along the southeast corner of the lot area which could be probed 1.5 to 2.0 feet using a 1/2 inch diameter soil probe. We recommend that the loose material be removed and replaced with structural fill material. It is our understanding that the area identified today will be over-excavated and backfilled with a 2-inch clean crushed rock material tomorrow. Lot 157: Today, GeoDesign noted that DDS had completed excavation of the footing and crawl space area for Lot 157. The exposed footing subgrade soil generally consisted of a gray-brown to brown silty SAND with gravel that could 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 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. Foundations should not be poured on frozen ground; any soils loosened from frost-heave should be removed from the base of foundation areas prior to placement of concrete. 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 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 e-°)