4418 31ST AVE SE 2018-03-28 - Laserfiche WebLink

w /),c1 I1� I VE� ily tilr(6 FIELD REPORT) Project Name: Everett River Front-Simpson Report: 056 GeoDesign #: Polygon-127-03 Date: 07/14/2017 Reports with Unresolved Nonconformance Issues: Permit: PW1505-005 VIMMIWIWOMIX Nick Abdelnour(Polygon) Randy Allen(City of Everett) Weather: Clear, 60-70's Ron Bowen(Polygon) Eddy Stevens(Polygon) Arrival/Departure: 0945/1230 Distribution: Doug Ross(Polygon) Kirk Keck(City of Everett) Paul McKee(City of Everett) Dave Foster(City of Everett) Prepared By: Ben Weinberg El Site Plan(s) 0 Density Test Summary Signature: Attachments: j- ❑ Installation Records 0 Other Reviewed By: RL PURPOSE of VISIT: GeoDesign representative, Ben Weinberg,was on-site part time at the request of Craig with DDS to observe the foundation subgrade for Lots 256, 257, 271, and 272. SUMMARY of OBSERVATIONS: LOT 257: Previously, GeoDesign noted that the Lot 257 area required 0.5 to 2.0 feet of over-excavation to expose firm and unyielding material which was compacted to greater than 95% of its maximum dry density as determined by a Modified Proctor analysis. Today, GeoDesign noted that BDZ had backfilled the over-excavated area with a cement-treated gray-brow silty SAND (f-m)with gravel (f-c)which was previously above its optimum moisture content. GeoDesign noted that the cement dust was added to stockpiles of material outside the foundation area and thoroughly mixed using the bucket of an excavator. GeoDesign noted that the material was mixed, placed, and spread using a Komatsu PC300 excavator and compacted into a firm and unyielding mass using a Hamm 3410 smooth-drum vibratory roller. Penetration depths encountered shortly after compaction were less than 2 inches using a 1/2 inch diameter soil probe. 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 foundation area prior to the placement of concrete. LOT 256: Today, GeoDesign noted that BDZ had completed excavation of the footing and crawl space area for Lot 256 using a Komatsu PC300 excavator. GeoDesign noted that the exposed foundation subgrade consisted of a gray to gray-brown silty SAND with gravel and concrete/asphalt. Penetration depths encountered across the west side of the lot area was generally less than 1 inch. GeoDesign noted that that the east side of the lot area required approximately 2.0 to 2.5 feet of over-excavation to expose firm and unyielding ground which could be probed less than 2 inches using a 1/2 inch diameter soil probe. GeoDesign notified the client and contractor that the excavation was currently suitable for placement of structural backfill. material. 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 BV'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