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fff&y HWA EO C1E ES NC. <br />TECHNICAL MEMORANDUM <br />TO: John Smith / David Evans & Associates <br />PREPARED BY: Steven E. Greene, L.E.G. / HWA GeoSciences Inc. <br />SUBJECT: SHALLOW SUBSURFACE CHARACTERIZATION <br />Everett Terminal & Cold Storage LLC <br />Everett, Washington <br />HWA PROJECT NO.: 2015-104-21 <br />DATE: May 25, 2017 <br />This memorandum presents the results of our limited field activities conducted to assess the <br />character and verifying the thickness of the rubbilized concrete layer placed over portions of the <br />site after building demolition by conducting a few test pits. In addition, we conducted <br />pothole/trenching in locations where we expect buried structures such as wood pilings, pile caps, <br />footing, tank saddles, and sheet piles within the proposed building foot print within the SW <br />portion of the Kimberly Clark- Everett Mill. This work was conducted in support of the design <br />by David Evans Associates (DEA) for re -development of the SW portion of the Kimberly Clark <br />— Everett Mill Site for use by Pacific Stevedoring LLC. <br />SITE LAYOUT <br />Initially, time was spent locating/flagging the four corners of the proposed building footprint <br />using a hand-held Trimble GeoXH GPS. Unit. We also located several areas of interest for <br />excavation, in addition to surface features such as CSO manholes and utility vaults as points of <br />reference. Areas excavated to determine lateral and vertical extent of buried structures or rubble <br />thickness are shown on Figure 1. <br />EXPLORATION <br />GPS locating and subsurface exploration were conducted on April 14th through April 16th, <br />2017. Excavations were conducted using a Deere 17-ZTS mini -excavator owned and operated by <br />John Pestell of Pestell Construction, Mukilteo, Washington. On 4/16 the mini -excavator broke <br />down, and was replaced by a Zaxiz 27-U excavator. Excavations were performed to a <br />maximum depth of 7 feet, as requested by the client. All excavations were logged <br />by a geologist from HWA. Depending upon the day and time, our field work was <br />21312 30th Drive sr <br />Suite 110 <br />Bothell, \N2A 98011.70 [t) <br />'I'el: 425.774.010E <br />Fax: 425.774.27 i 4 <br />www.bwageoxom <br />