6101 ASSOCIATED BLVD BASE FILE 2017-06-05

Underwood Gartland Everett, LLC ES-2232.02 February 6, 2015 Page 4 2012 Grading Activities and Settlement Monitoring Establishing rough grades throughout the site and future building pad areas was the primary objective of the 2012 earthwork activities. Prior to beginning the 2012 earthwork, the existing grade throughout the site was irregular and comprised of multiple stockpile areas associated with the adjacent Cemex gravel pit operations. In this respect, leveling the site to accommodate the future development areas was the main emphasis of the rough grading work. The process of leveling the site required cuts throughout much of the central and southerly portions of the property. Fills were also placed and compacted, but were largely limited to areas near the site margins and at the location of an old sedimentation pond located near the northeast corner of the site. Following grading activities, settlement monitoring across the site as a whole was conducted periodically over a period of approximately two and one-half years. During this time period, ESNW reviewed the data and coordinated with the owner with respect to the frequency of the data collection. In general, readings were collected every three to four months during the first year following grading. Subsequent readings were then collected roughly every nine months. The most recent set of settlement data was collected in January 2015. In general, measured total settlements across the site over the past two and one-half years following the earthwork activities have been on the order of one-half inch or less. Based on review the settlement data collected over the past two and one-half years, no long term trend of settlement throughout the site has been identified. DISCUSSION AND RECOMMENDATIONS General Based on the documented site conditions and monitoring following the 2012 earthwork and rough grading activities, the proposed warehouse construction and related site infrastructure improvements are feasible from a geotechnical standpoint. The warehouse structures can be supported on conventional continuous and spread footings bearing on at least two feet of structural fill. As determined necessary by the geotechnical engineer during construction, re- compaction of existing structural fill soils or overexcavation and replacement with new structural fill may be recommended. The building slab should be supported on a firm and unyielding subgrade comprised of at least one foot of structural fill. Specific recommendations for foundation subgrade preparation, backfill and compaction, pavements, and other pertinent design criteria are provided in the following sections of this study. This study has been prepared for the exclusive use of Underwood Gartland Everett, LLC and their representatives. No warranty, expressed or implied, is made. This study has been prepared in a manner consistent with the level of care and skill ordinarily exercised by other members of the profession currently practicing under similar conditions in this area. Site Preparation and Earthwork Given the prior 2012 rough grading activities and related building pad construction, significant mass grading activities are not expected. In this respect, the primary considerations related to site preparation and earthwork are expected to include the following: Earth Solutions NW, LLC