4849 SPIRE LN 2025-10-24 - Laserfiche WebLink

FIELD REPORT Fm'GE& I R C O R P O R A T! O Geotechnical and Earthquake Engineering Consultants 3213 Eastlake Ave E, Suite B Project No. Page No. Seattle, WA 98102 22-389 1 of 4 Tel: (206) 262-0370 Report No. Dates / Days of Week 01 October 51 & 91, 2023 / Thursday & Monday Project Name Location or Address Proposed Remedial Excavation 4849 Spire Lane, Everett, WA Owner Permit Weather Invitation Homes Overcast, mid 60°F Client Pile Contractor PanGEO Field Rep. Bluestone Environmental, NW (Dan Hatch) McDowell Pile King NW Tanner Townsend As requested, a PanGEO representative visited the site on October 5th and 9th, 2023, to observe pin pile installations and excavations for the above project. The following summarizes our observations during the site visits. Pin Pile Installation A PanGEO representative was on -site on a full-time basis to observe the installation of pin piles to underpin the portion of the foundation of the existing residence which could potentially be affected by the proposed remedial excavation. A total of 13, 2-inch pin piles were installed. The pin pile layout and numbering scheme can be seen in the modified Foundation/Pile Layout Plan at the end of this report. Pile depths and dates installed can be seen in the pin pile installation log at the end of this report. The installed piles consisted of galvanized 2-inch diameter, schedule 80 pipe delivered to the site in 5-foot 3-inch sections and spliced with steel compression couplers. Pile depths are rounded to the nearest 1/2 foot from cutoff. PanGEO observed the pile contractor (Pile King) drive each pile with a 140-pound pneumatic hammer. Each of the piles were driven to a refusal criteria of less than 1 inch of penetration during 60 seconds of continuous driving for at least 3 consecutive inches. Based on our observations, in our opinion the piles were driven in accordance with the plans and should provide the allowable axial capacity of 3 tons per pile. All pin piles were driven on October 5th Observe and Monitor Excavation During our site visit on 10/9, we observed the contractor make slot cuts between the installed pin piles to remove contaminated soils in the front yard (see Photo 2). The slot cuts we observed were generally 3 feet wide, 13 to 14 feet deep, 6 feet long at the bottom, and 10 feet long on the top. Slot cuts were backfilled with 22-389 4849 Spire Lane - FROI 2023.10.05_09.docx Page 1 PanGEO, Inc.