7301 EVERGREEN WAY EVERETT CHEVROLET 2017-03-01

Mr:Troy Freeman Ma 1 2013 Y Page3• : _ Based on a review of supporting documentation;listed above,pursuant to.:requirements'contained in MTCA and its iniplementing regulations, Chapter470.105D RCW.and Chapter 173-340 WAC, i for characterizing and addressing the following releases at the Site,'Ecology has determined• • :`EEC,LLC has:completed the Remedial InVestigation and has fully characterized the nature `:'and extent of contaminationat.the Site ' EEC,LLC has completed the Feasibility Study and has:presented the nature and extent of Site soil and ground water contamination sufficientlyto consider and evaluate remedial cleanup alternatives:: Theintent was to.evaluate the potential alternatives against MICA. • remedy selection criteria and select a preferred alternative. .The selection has been documentedin a Cleanup Action Plan(CAP).for Ecology's review and formal opinion MTCA Method A cleanup levels for groundwater(Table 720-1) at the:standard point of : compliance (throughout the Site from the uppermostlevel of the saturated zone extending vertically to the lowest depth which could,potentially be affected)are appropriate - • MICA Method A soil cleanup levels for unrestricted uses,are:appropriate(Table 740-1)with the standard point of compliance throughout the Siteto:a depth of 15 feetbelow the ground - surface (reference WAC 173-340-740(6)(d)) • The above cleanup levels are applicable.as'the Teizesltial Ecological Evaluation(1'bE) • exclusion(per WAC 173-340-7491(1)(b),Barriers to Exposure)has been identified: • The EEC,LLC evaluation of remedial cleanup alternatives in the Cleanup Action Plan(CAP) has determined Alternative 2 as the preferred alternative;which does meet the minimum. MTCA requirements,provides for apermanent solution to'the maximum extent practicable, and should achieve the goal of final cleanup._ Alternative 2 includes:- ® Demolition of existing buildings, concrete structures and asphalt pavement on the Property. __._:_ --- • ..Excavationof approximately 400 500 cubic yards of contaminated soil • • Off.-site disposal of soil in a permitted landfill:. • Backfilling of excavations with clean imported • Monitoring of ground water conditions.on the Property and on the.Site until four quarters of monitoring.results below MICA Method A cleanup levels for TPH O are This. opinion does not represent,a determination by Ecology that a proposed remedial action will be sufficient•to characterize and address the specified contamination at the Site-or:that no • further remedial action will be required at the Site'upon;completion of the proposed remedial - action. To obtain either of these,opinions,'you:must submit appropriate documentation to Ecology and request..such an opinion under the VCP: This letter also does:'not::provide. an opinion regarding the sufficiency of any'other remedial action proposed for orconducted at the Site.