4507 RIVERFRONT BLVD 2018-12-26 - Laserfiche WebLink

G O DESIGNki FIELD REPORT Project Name: Everett River Front-Simpson Report: 082 GeoDesign#: Polygon-127-03 Date: 11/10/2017 Reports with Unresolved Nonconformance Issues: Permit: PW 1505-005 1111b... MID . ... Nick Abdelnour(Polygon) Randy Allen(City of Everett) Weather: Clear, 50's Ron Bowen(Polygon) Eddy Stevens(Polygon) Arrival/Departure: 1315/1400 Distribution: Doug Ross(Polygon) j 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) 0 Density Test Summary Signature: may: 0 Installation Records 0 Other Reviewed By: PURPOSE of VISIT:GeoDesign representative, Ben Weinberg,was on-site part time at the request of Craig with DDS to observe foundation subgrade for Lot 229. 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 229: Previously, GeoDesign noted that the east 1/3 of the foundation subgrade area could be probed 1-3 feet using a 1/2 inch diameter soil probe and recommended that the loose soil be removed down to firm and unyielding material and replaced with a clean crushed railroad ballast material. Today, GeoDesign noted that DDS had over-excavated the footing areas 1 to 3.5 feet down to firm and unyielding ground;the width of the over-excavated areas were approximately 4 feet. GeoDesign noted that the base of the over-excavated areas consisted of gray silty SAND(f-m)with gravel (f-c)which could be probed less than 2 inches using a 1/2 inch diameter soil probe. The over-excavated areas had partially filled with water from recent precipitation; DDS was in the process of dewatering the over-excavated areas while we were on-site today. After the water had been pumped away, GeoDesign notified Craig with DDS that the over-excavated areas were currently suitable for placement of backfill material. It is our understanding that the contractor intends on backfilling the over-excavated area with a 2-inch clean crushed railroad ballast material by the beginning of next week. The west 2/3rd's of the footing and crawl space area was still covered with approximately 1-2 inches of surficially loose and saturated material which should be removed prior to placement of concrete. The client and contractor were notified of our observations prior to our departure from the site. 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 indude 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 /f