1600 MADISON ST 2016-01-01 MF Import

EXECUTIVE SUMMARY At the request of the City of Everett (the Ciry), G-Logics has completed a site exploration to better determine the nature and extent of any remaining gasoline contamination at this site. This property is identified as Fire Statioe 5 and the four adjacent residential properties located at the intersection of Madison Screet and Beverly Boulevard, in Everett, Washington. Contamination at this site was originally discovered in 1991, due to a release from an underground gasoline storage tank located at the southwest comer of the fire- station building. Aiso in 1991, this tank and a large volume of contaminated soils were excavated and removed from the site. G-Logics and subcontract personnel completed seven soil borings on the subject property in October of 2000. Five borings were completed for a concurrent geotechnical exploration. Two deeper borings, located in the area the former underground storage tank (JST) release, were drilled and completed as groundwater monitoring wells. Soil samples were obtained from borings and were submitted for laboratory analysis. Extremely dense fine-grained soils (glac .1 till) were encountered throughout the property to depths of approximately 40 feet. At this depth, sands, with some gravel and silt, were discovered to exp;ore depths (maximum 60 feet). Subsurface soils were discovered to be occasionally moist, but did not yield water into the two completed wells. Petroleum-contaminated soils were not discovered by this exploration, but contaminuus were identified in two of the eight analyzed soil sampies (at concentrations below published cleanup levels). Petroleum cor,taminanu were discovered in the water sample collected from VW-1, a vapor monitoring well installed in 1991. These contaminants included gasoline-range hydrocazbons and the related compounds ethylbenzene, toluene, and xylenes. The water present in VW-1 appears to be due to infiltraticn of surface water azound the monitoring well and not representative of groundwater or perched groundwater. Based on the results of this exploration, G-Logics concludes that: • Additional soil or groundwater sampling to further define the azea impacted by gasoline contaminants is not necessary. Based on information discovered during this exploration, and our understanding of pending regulatory changes and planned site uses, the detected contaminant concenhations aze not expected to pose a threat to human healtn or the environment. 01-0105-GRT.doc � �f s/��f'�`� Copyright 2001 G•Logics, fnc. Page I of 14 ��