4510 31ST AVE SE 2018-12-27 - Laserfiche WebLink

k { 451 FIELD REP : GE DESIGNOT S of =1 Project Name: Everett River Front-Simpson Report: 062 GeoDesign#: Polygon-127-03 Date: 07/24/2017 Reports with Unresolved Nonconformance Issues: Permit: PW1505-005 Nick Abdelnour(Polygon) Randy Allen(City of Everett) Weather: Clear, 60-70's Ron Bowen(Polygon) Eddy Stevens(Polygon) Arrival/Departure: 1645/1700 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: 0 Site Plan(s) 0 Density Test Summary Signature: 0 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 249 and 250. SUMMARY of OBSERVATIONS: LOT 249: Today, GeoDesign noted that BDZ had completed excavation of Lot 249 down to firm and unyielding material using a Komatsu PC300 excavator. GeoDesign was not on-site to observe the base of the over-excavated area prior to the placement of backfill material. According to the contractor and based on pictures provided by Doug Ross with Polygon, it appears that the lot area was over-excavated 2-3 feet down to a gray-brown silty SAND with gravel which exhibited significant resistance to digging with the excavator bucket. Over-excavation depths for the lot appeared to be consistent with the adjacent Lot 250.After being described the conditions encountered, GeoDesign notified the contractor that the over-excavated area could be backfilled. It is our understanding that BDZ cement-treated the material removed from the lot area using the bucket of the excavator.According to the contractor,the treated material was placed and spread using the excavator and compacted into a firm and unyielding mass using a smooth-drum vibratory roller. During our afternoon site visit, GeoDesign noted that the exposed backfill material consisted of a cement-treated gray to gray-brown silty SAND with gravel which could be probed generally less than 2 inches using 1/2 inch diameter soil probe. It is the opinion of GeoDesign that the exposed foundation subgrade for Lot 249 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 area prior to the placement of concrete. LOT 250: Previously, GeoDesign noted that BDZ had over-excavated the Lot 250 area approximately 2-3 feet down to firm and unyielding ground and partially backfilled the excavation with a cement treated soil. Today, GeoDesign noted that BDZ completed filling the lot area to near plan bottom of footing using the previously mentioned cement treated material. GeoDesign noted that the exposed fill material could generally be probed generally 1 inch during our afternoon visit. It is the opinion of GeoDesign that the exposed foundation subgrade for Lot 250 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 area 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