1600 MADISON ST 2016-01-01 MF Import

3.0 SITE EX�'LORATION ACTIVITIES To provide information on possible to maintain soil and groundwater contamination at this site, several different methods of subsurface investigation were conducted on the subject property. Soil exploration included completion of r.iultiple exploratory soil borings a��d the collection of subsurface soil samples. In order to access the possible presence and quality of shaltow groundwater in the area of concern, several of the exploratory soil borings were completed as monitoring wells. A G-Logics geologist was present during the exploration to observe and document soil and groundwater conditions. (Note: All G-Logics geologists are registered with the Washington Department of Ecology (Ecology) Underground Storage Tank Program to perform tank site assessments [WAC 173-360-600 through 173-360-680].) The following tasks were executed under this scope of services: • Drilled and sampled seven (7) soil borings. Five of these borings were completed for a concurrent geotechnical investigation (for the new station building design). • Completed two of the borings as monitoring wells (BH-6/MW-1 and BH- 7/MW-2), even though su�cient groundwater did no: appeaz to be present. • Submitted soil samples from the completed borings (BH-6 and BH-%) for peuoleum-hydrocazbons analyses. • Measured water levels in the two new monitoring wells and the two existing mo�ito-i�tg wells (VW-1 and VW-2). • Abandoned well VW-1, as the well casing was discovered to be broken and obstrucied •with bentonite. This wPll was opened with a drilling rod, filled with granulaz bentonite, the bentonite hydrated with water, and the well capped with concrete. • Collected water samples from WV-2 (the only wcll discovered to contain water, although possibly due to infiltrallon of surface water caused by a poor surface seal). • Submitted the collected water sample (from VW-2) for petroleum- hydrocarbons analyses. • Prepazed this report to document our fandings and recommendarions for this area of the property. 01-0105-GRT.doc . i( S/"�t('�S Copyright 2001 Gd.agics, Inc. Page 6 oC 14 V �/'