4326 30TH DR SE 2017-09-20 - Laserfiche WebLink

DESIGNuz FIELD REPORT t 1 of 4 Project Name Everett River Front-Simpson Report: 010 __ .... — _v GeoDesign#: Polygon-127-03 Date: 12/06/2016 Reports with Unresolved Nonconformance Issues: Permit: PW 1505-005 . 71 >,. a Nick Abdelnour(Polygon) Randy Allen(City of Everett) Weather: Clear, 30's Ron Bowen(Polygon) Eddy Stevens(Polygon) Arrival/Departure: 1415/1545 Distribution. I — _____. [Doug Ross(Polygon) Kirk Keck(City of Everett) ------- .......... _.._ __—. � ---- ...... .......... Paul McKee(City of Everett) Dave Foster(City of Everett) Prepared Fly: Ben Weinberg, E.I.T. _— m Site Plan(s) m Density Test Summary signature: Attachments: ____ _ — _ _.,_ _ �- d Installation Records ❑ Other Reviewed By: ' PURPOSE of VISIT: GeoDesign representative, Benjamin Weinberg,was on-site part time at the request of John Feltner with Polygon to observe the foundation subgrade for Lot 139. SUMMARY of OBSERVATIONS: Lot 139: Upon arrival, GeoDesign noted that the foundation excavation subcontractor had completed digging the foundation and crawl space area for Lot 139. GeoDesign noted that the exposed foundation subgrade generally consisted of a gray-brown silty SAND (f-m)with gravel. For the east 1/3 and west 1/3 of the foundation area, penetration depths using a 1/2 inch diameter soil probe were less than 2 inches. For the center 1/3, GeoDesign identified exposed foundation subgrade soils which could be probed 1 to 1-1/2 feet;this area was marked with orange spray paint. GeoDesign recommended that the area be over-excavated down to firm and unyielding soils,geotextile placed across the excavation, and backfiled with structural fill material. While on-site, GeoDesign noted that the foundation excavation subcontractor used an excavator and grade blade to remove the previously mentioned loose soil from the center 1/3 of Lot 139. Material exposed at the base of the over-excavated area consisted of a gray silty SAND with gravel which could be probed less than 2 inches. Relative compaction of the exposed subgrade soils and over-excavated areas were tested using a Troxler Moisture-Density gauge. In-place density tests indicated that the material had been compacted to greater than 95%of its maximum dry density as determined by a Modified Proctor analysis. GeoDesign notified the foundation excavation subcontractor and client that the over-excavated area was suitable for placement of the geotextile material and structural fill. It is GeoDesign's understanding that the contractor will backfill the over-excavated area with a clean 2-inch railroad ballast material compacted into a firm and unyielding mass. A summary of our observations can be found in the attached Figure 1, Nuclear Density Gauge Data, and Photo Log. John Feltner with Polygon was notified of our observations prior to our departure from the site. This report presents opinions formed as a result of our observation of actw ties wating to geotechnical engineering or environmental services.We rely on the contractor to complywith the plans and specifications throughout the duration of the project irrespective of the presence of our representative. Our work does not include supe visior 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 observatlons,testing,and preliminary recommendations. The report can only be considered Onal upon review of the GeoDesign project manager,as indicated by initials in the"Reviewed By"section. 10700 Meridian Avenue North,Suite 402 1 Seattle,WA 98133 1 206.838.9900 2502 Jefferson Avenue I Tacoma,WA 98402 1 253.203.0095 ,f