4405 31ST AVE SE 2019-11-04 - Laserfiche WebLink

t..�C u FIELD REPORT DESIGNf Project Name: Everett River Front-Simpson Report: 049 GeoDesign#: Polygon-127-03 Date: 06/15/2017 Reports with Unresolved Nonconformance Issues: Permit: PW1505-005 Nick Abdelnour(Polygon) Randy Allen(City of Everett) Weather: Cloudy, 60's Ron Bowen(Polygon) Eddy Stevens(Polygon) Arrival/Departure: 1400/1600 Distribution: Doug Ross(Polygon) Kirk Keck(City of Everett) Paul McKee(City of Everett) Dave Foster(City of Everett) Prepared By: Ben Weinberg Attachments: m Site Plan(s) m Density Test Summary Signature: ❑ Installation Records m Other Reviewed By: SUMMARY of OBSERVATIONS (CONTINUED): LOT 266: Previously, GeoDesign noted that Lot 266 had been over-excavated approximately 2.0 feet down to material which could be generally probed less than 2 inches (with the exception of pockets of material near center that could be probed -"8 inches) and which in-place density tests indicated had been compacted to greater than 95% of its maximum dry density as determined by a Modified Proctor analysis.Also, GeoDesign previously noted that a non-woven geotextile material had been placed across the entire lot area. Today, GeoDesign noted that the lot area had been backfilled with a 2-inch clean crushed railroad ballast material which had been compacted into a firm and unyielding mass. It is the opinion of GeoDesign that the foundation area observed today is currently suitable for support of the intended structure. LOT 267: Today, GeoDesign noted that Craig with DDS had completed excavation of the foundation and crawl space area for Lot 267; GeoDesign noted that DDS had identified loose material along the west 1/3 of the building area and had over-excavated the area down approximately 2 feet below plan bottom of footing. GeoDesign noted that that the exposed subgrade material on the west 1/3 of the building area could be probed up to 3 feet using a 1/2 inch diameter soil probe. GeoDesign recommended that the material be over-excavated down to firm and unyielding soil. GeoDesign remained on-site while DDS over-excavated the area to approximately 5 feet below plan bottom of footing. Material exposed at the base of the over-excavated area could be probed less than 2 inches using a 1/2 inch diameter soil probe. GeoDesign departed the site before DDS had completed cleaning out the over-excavated area. DDS intends on backfilling the over-excavated area with 2-inch clean crushed rock material tomorrow. LOT 268: Today, GeoDesign noted that Craig with DDS had completed excavation of the foundation and crawl space area for Lot 268; GeoDesign noted that that the exposed subgrade material generally consisted of a gray-brown silty SAND with gravel which could generally be probed less than 1 inch. Relative compaction of the exposed foundation subgrade was tested using a Troxler Moisture-Density gauge; in-place density tests indicated that the material along the east side had been compacted to less than 95%of its maximum dry density. During driving of the probe on the east side of the lot, GeoDesign noted a significant drop in pin resistance at approximately 12 inches BGS. Penetration depths into the hole driven for the in-place density test using a soil probe was approximately 2 feet. GeoDesign observed a test pit in the area, which indicated that the east 1/4 of the lot would require over-excavation up to 4 feet BGS. Further observations will be made tomorrow. A summary of our observations can be found in the attached Figure 1, Figure 2, and Nuclear Density Gauge Data. 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