4419 30TH DR SE 2021-12-15 - Laserfiche WebLink

M . �k � DESIGNuz FIELD REP of Project Name: Everett River Front- Simpson GeoDesign #-_:I Polygon-127-03 Report' 038 Revisgc� Date: 05/09/2017 Reports with Unresolved Nonconformance Issues: _ _ _ Permit: PW1505-005 ... •-:•;, -;."' <.' aw'<Ra:.s -:z_ .. vim..: . _.Wk a d, {Heather: Clear, 60's Nick Abdelnour (Polygon) Randy Allen (City of Everett) Distribution:--._-__.,,_.._..__.�...-. Ron Bowen (Polygon) Eddy Stevens (Polygon) Arrival/Departure: 1530/1600 Doug Ross (Polygon) Kirk Keck (City of Everett) Paul McKee (City of Everett) Dave Foster (City of Everett) Prepared By: Ben Weinberg N� m Site Plan(s) m Density Test Summary Signature: Attachments: Installation Records ID Other Reviewed By: %p PURPOSE of VISIT: GeoDesign representative, Ben Weinberg, was on -site part time at the request of Craig with DDS to observe the foundation subgrade for Lot 238 and 239. SUMMARY of OBSERVATIONS: Lot 239: Today, GeoDesign noted that DDS had completed excavation of the footing and crawl space area for Lot 239. GeoDesign noted that the exposed foundation subgrade consisted of a gray, brown, and gray -brown silty SAND (f-m) with gravel (f-c) and a brown SILT with sand. Penetration depths using a 1/2 inch diameter soil probe ranged from 1 to 2.5 feet. GeoDesign recommended that the lot area be over -excavated down to firm and unyielding material or down 2 feet and brought back to grade with structural fill. if crushed rock material is used, a non -woven geotextile material should be placed across the subgrade area prior to backfilling. Craig with DDS stated that the lot area would be over -excavated and backfilled later this week. Eddy Stevens suggested that they may over -excavate the lot area and backfill with cement -treated material. If the client elects to cement -treat the on -site material, GeoDesign recommends treating the silty SAND material at a rate of approximately 4-5% by dry weight of the soil (assume 120 Ibs of dry weight per cubic foot). Higher levels of treatment would be required for treating the exposed brown SILT material. Lot 238: Previously, GeoDesign noted that DDS over -excavated unsuitable areas for Lot 238. Today, GeoDesign noted that DDS had backfilled the over -excavated area with a 2-inch clean crushed material tamped into a firm and unyielding mass using the bucket of an excavator. It is the opinion of GeoDesign that the exposed foundation area for Lot 238 observed today is currently suitable for support of the intended structure. GeoDesign recommends that any surficially loose and saturated material be removed from the base of the footing area prior to the placement of concrete. The client and contractor were notified of our observations prior to our departure from the site. A summary of our observations and density tests 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 1 Seattle, WA 98133 1 206.838.9900 2502 Jefferson Avenue I Tacoma, WA 98402 1 253.203.0095