4506 29TH AVE SE 2019-03-15 - Laserfiche WebLink

GEO EI( Iz FIELD REPORT o ._ . 095 I Project Name Everett River FrontReport Simpson ___._.___ ...__.._ _.. ___.._._____....___ . ..- -- ---_-- i GeoDesign#: 1 POIygon-127-03 Date: 2/19/2018 Reports with Unresolved Nonconformance Issues: Permit: PW1505-005 i L ��...,. _ ...-, ,..oma.. -� ii Nick Abdelnour(Polygon) Randy Allen(City of Everett) Weather: Clear, 30's Ron Bowen(Polygon) _ Eddy Stevens(Polygon) Arrival/Departure: 1600/1645 Distribution: Doug Ross(Polygon) Keck(City of Everett) 0800/0830 Ben Weinberg, EI Paul McKee(City of Everett) ; Dave Foster(City of Everett) Prepared By • m Site Plan(s) T m Density Test Summary ( Signature: >%�----//e--,---= Attachments: '---- ❑ Installation Records ❑ Other Reviewed By: 1 .r..a a..« .. ........,,�.....a„.w�.. ...tee....« ..v.....�..»-....,. �.........,.. 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 203. SUMMARY OF OBSERVATIONS: Lot 205: Today, GeoDesign noted that DDS had completed excavation of the footing and crawl space area for Lot 205. The exposed footing subgrade soil generally consisted of a gray-brown silty AND with gravel that could probed less than 2 inches using a 1/2 inch diameter soil probe. Relative compaction of the footing subgrade soils was tested using a Troxler Moisture-Density gauge; in-place density tests indicated that material had been compacted to greater than 95% of its maximum dry density as determined by a Modified Proctor analysis. GeoDesign noted an approximately 15 feet long area at the west end of the south perimeter footing which could be probed 6 to 12 inches using a 1/2 inch diameter soil probe; we recommended that the material be removed and replaced with structural fill. GeoDesign observed the removal of material while on-site down to firm and unyielding soil.The over-excavated area was backfilled with 2-inch clean crushed rock material compacted into a firm and unyielding mass. It is the opinion of GeoDesign that exposed foundation subgrade observedtoday is currently suitable for support of the intended structure. GeoDesign recommends that any surficially loose and saturated material be removed from the base of foundation areas prior to the placement of concrete. Foundations should not be poured on frozen ground; any soils loosened from frost-heave should be removed from the base of foundation areas prior to placement of concrete. Lot 204: Today, GeoDesign noted that DDS had completed excavation of the footing and crawl space area for Lot 204. The exposed footing subgrade soil generally consisted of a gray-brown silty AND with gravel that could probed less than 2 inches using a 1/2 inch diameter soil probe. Relative compaction of the footing subgrade soils was tested using a Troxler Moisture-Density gauge; in-place density tests indicated that material 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 exposed foundation'subgrade 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 foundation areas prior to the placement of concrete. Foundations should not be poured on frozen ground; any soils loosened from frost-heave should be removed from the base of foundation areas prior to placement of concrete. A summary of observations and density tests taken can be found in the attached Figure 1 and Nuclear Density Gauge Data. The contractor was notified of our observations prior to our departure from the site today. 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