4515 RIVERFRONT BLVD 2018-12-26 - Laserfiche WebLink

• t GEoDES1CN FIELD REPORT 1 of Project Name: Everett River Front-Simpson Report 081 GeoDesign#: Polygon-127-03 Date: 11/9/2017 Reports with Unresolved Nonconformance Issues: Permit: PW 1505-005 181 - ,.s Nick Abdelnour(Polygon) and Allen(City of Everett) Weather: Cloudy, 50's Ron Bowen(Polygon) i Eddy Stevens(Polygon) Arrival/Departure: 0900/0915 Distribution: Doug Ross(Polygon) 1 Kirk Keck(City of Everett) 1515/1600 Paul McKee(City of Everett) i Dave Foster(City of Everett) Prepared By: Ben Weinberg, EIT Attachments: m Site Plan(s) m Density Test Summary Signature: 7;,—. ❑ Installation Records ❑ Other Reviewed By: y.1.k, ,.,,....,• . PURPOSE of VISIT:GeoDesign representative, Ben Weinberg,was on-site part time at the request of Craig with DDS to observe foundation subgrade for Lots 227,228,229,and 277. SUMMARY OF OBSERVATIONS: Now that we have entered the wet season, it is more likely that surficially loose and saturated soil (i.e. mud and muck)will develop in areas where exposed soil gets wet.We recommend that excavations be graded to drain water away from the foundation and crawl space areas.We also recommend that excavation of the foundation areas be sequenced to minimize exposure to wet weather and disturbance from construction activities. If this sequencing is not feasible,then a thin layer of clean crushed rock can be placed over the exposed soil to protect the exposed soil during wet weather construction activities. Foundation subgrade evaluations should be scheduled just prior to construction of concrete forms to avoid the deterioration of the foundation subgrade after our evaluation. Before footings are poured,we recommend that any mud that has developed in footing areas be scraped off and removed. We recommend that we be contacted to re-evaluate footing subgrade if significant deterioration has occurred since our previous visit. LOT 227: Today, GeoDesign noted that the foundation excavation subcontractor had completed excavation of the footing and crawl space area for Lot 227. GeoDesign noted that exposed foundation subgrade consisted of a gray-brown silty SAND(f-m) with gravel (f-c)which could generally be probed less than 2 inches using a 1/2 inch diameter soil probe. Relative compaction of the exposed foundation subgrade was tested using a Troxler Moisture-Density Gauge; in-place density tests indicated that the exposed soil had been compacted to greater than 95% of its maximum dry density as determined by a Modified Proctor analysis. 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 that may build up beneath the foundation be removed prior to the placement of concrete. LOT 228: Today, GeoDesign noted that the foundation excavation subcontractor had completed excavation of the footing and crawl space area for Lot 228. GeoDesign noted that exposed foundation subgrade consisted of a gray-brown silty SAND(f-m) with gravel (f-c)which could generally be probed less than 2 inches using a 1/2 inch diameter soil probe. GeoDesign noted the footing and crawl space excavation was covered in approximately 1-2 inches of surficially loose and saturated material that appeared to be associated with foot traffic across the lot area. Relative compaction of the exposed foundation subgrade was tested using a Troxler Moisture-Density Gauge; in-place density tests indicated that the exposed soil had been compacted to greater than 95%of its maximum dry density as determined by a Modified Proctor analysis. It is the opinion of GeoDesign that the soil underlying the footing areas is suitable for support of the intended structure with the exception of the previously mentioned surficially loose and saturated soil. GeoDesign recommends that any loose soil beneath footing areas be removed 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 de