4439 RIVERFRONT BLVD 2018-03-29 - Laserfiche WebLink

GEODESIGNz FIELD REPORT of` Project Name: Everett River Front-Simpson Report: 059 GeoDesign #: Polygon-127-03 Date: 07/19/2017 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: 0945/1620 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: m Site Plan(s) m Density Test Summary Signature: 0 Installation Records 0 Other Reviewed By: SUMMARY of OBSERVATIONS (CONTINUED): LOT 231: Today, GeoDesign noted that DDS had completed excavation of the footing and crawl space area for Lot 231. According to Craig with DDS, the lot area near the center required approximately 1.5 feet of over-excavation to expose firm and unyielding ground. GeoDesign noted that the exposed foundation subgrade consisted of a gray to gray-brown silty SAND (f-m)with gravel (f-c) and trace debris which could generally probed less than 2 inches for the west 2/3 of the lot area using a 1/2 inch diameter soil probe; for the east 1/3 of the lot area, GeoDesign encountered probing depths of approximately 18 inches below an approximately 4 inch dessicated surficial crust. GeoDesign recommended that the east side of the lot area be over-excavated down to firm and unyielding underlying soil. Relative compaction of the exposed foundation subgrade material on the west side of the lot area was tested using a Troxler Moisture-Density gauge; in-place density tests indicated that the exposed material on the west 2/3rd's of the lot area had been compacted to greater than 95%of its maximum dry density as determined by a Modified Proctor analysis. GeoDesign noted that DDS over-excavated the east 1/3 of the lot area 1.5-2.0 feet today down to material which could be probed less than 2 inches. GeoDesign notified Craig with DDS that the excavation was currently suitable for placement of backfill material. GeoDesign noted that DDS was in the process of cement-treating material excavated from the lot areas for use as structural backfill material; the backfill material was placed and compacted after our departure from the site. LOT 232: Today, GeoDesign noted that DDS had completed excavation of the footing and crawl space area for Lot 232. GeoDesign noted that the exposed foundation subgrade consisted of a gray to gray-brown silty SAND (f-m)with gravel (f-c)and trace debris which could generally probed less than 2 inches for the west 1/3 and east 1/3 of the lot area using a 1/2 inch diameter soil probe; for the center 1/3 of the lot area, GeoDesign encountered probing depths of approximately 1.5 to 2.0 feet. GeoDesign recommended that the center 1/3 of the lot area be over-excavated down to firm and unyielding underlying soil. Relative compaction of the exposed foundation subgrade material on the east and west side of the lot area was tested using a Troxler Moisture-Density gauge; in-place density tests indicated that the exposed material had been compacted to greater than 95%of its maximum dry density as determined by a Modified Proctor analysis. GeoDesign noted that DDS over-excavated the center 1/3 of the lot area 1.5-2.0 feet today down to material which could be probed less than 2 inches. GeoDesign notified Craig with DDS that the excavation was currently suitable for placement of backfill material. GeoDesign noted that DDS was in the process of cement-treating material excavated from the lot areas for use as structural backfill material; the backfill material was placed and compacted after our departure from the site. A summary of our observations and density tests taken today can be found in the attached Figure 1. 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