Attachment 4: SITE WORK REPORT - GYE + ASSOCIATES

SITE WORK REPORT

WORK OBJECTIVES:

• Dig test pits throughout property to attempt to map the subterranean surface. Utilizing bedrock in the construction of the structure will provide seismic advantages that can be incorporated into structure design improvements.

OBSERVATIONS/COMMENTS (equipment/techniques used, results etc.):

• A mini excavator was used to dig sample pits down to bedrock for measurement.
• Sample pits were selected by the Engineering technician on site, with advice from the project arborist to avoid unnecessarily impacting trees.
• All pits were greater than 6 metres from the nearest trees.
• Bedrock was found in only one of the six sample pits attempted.
• The project arborist actively supervised the digging in order to further minimize roor disturbance. The project arborist also supervised the routing of the machine as it moved between pits.
• No significant roots or above tree damage occurred during the course of this work.
• Site conditions were dry, enhancing the trafficability of the soil.

FURTHER ACTIONS REQUIRED

None

Photographic Images

All the soil pits looked similar to this one. No roots over 2 cm were cut. Roots were concentrated in the up 40cm LFH layer and A horizons. Width was 36”, length 8 ‘, depth to 6 ‘. Soil was silty sand near the top (root horizon), with silty-clay in the lower layer (free of roots).

Despite an upland condition with some exposed bedrock, most of the area exhibited over 6 ‘of soil depth. Dominant tree species include a preponderance of Douglas fir with minor elements of Arbutus, Garry oak, Grand fir, and Bigleaf maple.