4507 30TH DR SE 2018-12-31 - Laserfiche WebLink

GE DESIGN FIELD REP RT 0 Project Name: Everett River Front-Simpson Report: 069 GeoDesign#: Polygon-127-03 Date: 08/04/2017 Reports with Unresolved Nonconformance Issues: Permit: PW1505-005 Nick Abdelnour(Polygon) Randy Allen(City of Everett) Weather Clear, 60-80's Ron Bowen(Polygon) Eddy Stevens(Polygon) Arrival/Departure: 0815/1415 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: ❑ Site Plan(s) 0 Density Test Summary Signature: : (46,"�� ❑ Installation Records ❑✓ Other Reviewed By: RL PURPOSE of VISIT: GeoDesign representative, Ben Weinberg,was on-site part time at the request of Leroy with BDZ to observe foundation subgrade for Lots 246 and 247. SUMMARY of OBSERVATIONS: LOT 246: Previously GeoDesign noted that the top 1.5 feet of the west 1/3 of the Lot 246 area was backfilled with a cement-treated material which could be probed up to 1.5 feet using a 1/2 inch diameter soil probe. Today, GeoDesign noted that the exposed fill material could be probed approximately 1 inch using a 1/2 inch diameter soil probe. it is the opinion of GeoDesign that the exposed foundation subgrade 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 247: Previously, GeoDesign noted that the contractor completed excavation of the east 1/3 of the Lot 247 area down to firm and unyielding soil which could be probed less than 2 inches using a 1/2 inch diameter soil probe. Today, GeoDesign noted that the contractor continued excavation of the center 1/3 and west 1/3 of the Lot 247 area down to material which could generally be probed less than 2 inches using a Komatsu PC300 excavator. GeoDesign noted that BDZ backfilled the over-excavated area with a cement-treated gray-brown 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 in approximately 18 inch loose lifts using a Komatsu PC300 excavator and compacted into a firm and unyielding mass using an excavator-mounted hoepack. Penetration depths encountered shortly after compaction were generally 2-4 inches using a 1/2 inch diameter soil probe. GeoDesign noted that the lot area was backfilled to near the plan bottom of footing today. It is the opinion of GeoDesign that the exposed foundation subgrade 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. 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