220 OLYMPIC BLVD VOICESTREAM WIRELESS ANTENNA 2018-01-01 MF Import

r r r r r �- �. �. � ADaPT Enr;ineerinp, I�n_ approximately 8 feet bgs. Below 8 feet bgs, the soil became firtn to hard moist yray to dark gray day with trace sand which was irterpreted to be glacial tlll or'hardpan". The glaaal till deposit extended to the full-explored depth of 28.5 feet. Gladal 811 is a glacially overcansolidated deposit, which was compressed by the weight of thousands of feet of gladal ice. Accordingly, the dll and all soil units deposited stra8graphically below the till are very derue and relativey incompressible. Dense to very dense or hard soil conditions were encountered for the full depth of the test boring below 12-feet bgs. 5.3 Groundwater Conditlons Free water was not encountered in the boring during drilling. However, very moist to wet day soil was encountered in the boring betwcen 8 and 10 feet. The adjacent BP Station monitoring wells indicate that groundwater is approximately 4 to 10 feet below ground surtace. It should be recociized that groundwater levels could fluctuate due to factors such as seasonal changes, precipitation or future site utilization. Although groundwater flow direction is difficult to predict without the installation of at ieast three monitoring wells that measure water levels over time, an estimate of possible near-surface groundwater flow direction is provided to help evaluate potential on-site and off-site contaminant impacts. Groundwater flow direction is the path along which dissolved contaminants might migrate if present in groundwater supplies. Typically, in this region, ttie near-surtace groundwater flow direction generally follows topography. The subject area sbpes down to the west and so near-surface groundwater flow direction likely follows the tupogr^.phy and moves toward the west. Variations in the assumed flow direction may exist that would remain uncharacterized without performing a subsurface exploration program with groundwater monitoring wells, which is beyond the Phase I scope of work. 1 Based on the review of Washington State Department of Ecology LUST file for the adjacent gasoline station the groundwater is reportedly flowing towards the west-northwest. According to the file the depth to groundwater is approximately 4 feet to 5 teet in the well to the east of the lease area. � 5.4 Drinking Water Suppifes and Water Wells � The host parcel and surrounding area obtain their public drinking water supply from the Ciry of Everett Public Works Department. According to staff personne� for the Public Works Department, the PWD obtains its water supply from Spada Lake Reservofr bcated at the headwaters of the � Sultan River approximately 30 miles east of Everett. Based on the separation distance, it is highly unlikely this drinking water supply would be fnfluenced by the host parcel. ' A review of water well reports at the Washington Department of Ecology (Ecology) Northwest Regional Office in Bellevue, Washington revealed approximately four domesdc drinking water wells located within one mile of the subject site. These wells appear to be over one-quarter mile _ away from the host parcel and appear unlikely to be influenced by the host parcel. 6.0 HISTORICAL USE INFORMATION This section is divided into two subsections. The first subsection (Section 6.1) summarizes the various historical sources that were consulted. The second subsectlon (Section 6.2) is a decade by decade discussion oF the historical uses of the host parcel and immediate surrounding area. VoiceSVeam•Masonlc Center �� 5� � ADaPT Projecl No. WA00�4147-7 � S