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GeoTest Services, Inc. April 12, 2019
<br /> 4320 Thomson Avenue, Everett, WA Project No.19-0050
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<br /> Image 3:2009 Aerial Photo. Taken from Google Earth.
<br /> The 1990 aerial photo (Image 2) appears to indicate that land use within the subject
<br /> and adjacent properties has remained relatively unchanged within the last 28 years.
<br /> Since 1990, new single-family residences have been constructed upslope from the
<br /> subject property, and some vegetation has been removed from the slope.
<br /> There does not appear to be any noticeable signs of large-scale "global" instability on
<br /> or just west of the subject property, as observed in the reviewed aerial photos
<br /> spanning 28 years. Please note that the aerial photos may not fully depict actual
<br /> surface conditions due to the tree canopy and/or other vegetation possibly obscuring
<br /> the ground surface.
<br /> Bare Earth Imagery Review
<br /> GTS reviewed bare earth imagery of the site vicinity, subject property, and slope.
<br /> Based on a review of this imagery, there does not appear to be any visible indications
<br /> of tension cracks or large-scale head scarps associated with slope instability. Outside
<br /> of the general topographic profile of the slope, no signs of large scale "global"
<br /> instability on the subject property were observed in our bare earth imagery review.
<br /> Please note that not all signs of slope instability can be observed in the bare earth
<br /> imagery review due to imagery resolution and scale. In addition,any signs of instability
<br /> on the site slopes that have occurred within the last -5 years, if present, have occurred
<br /> after original imagery acquisition.
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