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Vince Bruscas June 24, 2019 Page 3 Those documents are kept in the Central Files of the Northwest Regional Office of Ecology (NWRO)for review by appointment only. You can make an appointment by calling the NWRO resource contact at(425) 649 - 7024 or sending an email to nwro_public—request@ecy.wa.gov. Some of the documents are also available on Ecology's webpage https://apps.ecology.wa. og_v/ sng,/Sitepay,e.aspx?csid=14477. Use the right hand navigation panel to access (open) electronic documents. This opinion is void if any of the information contained in those documents is materially false or misleading. Analysis of the Cleanup Ecology has concluded that,upon completion of your proposed cleanup, no further remedial action will likely be necessary to clean up contamination at the Site. That conclusion is based on the following analysis: 1. Characterization of the Site. Ecology has determined your characterization of the Site is sufficient to establish cleanup standards and select a cleanup action. The Site is described above and in Enclosure A. In November of 2016, seven soil borings and ten test pits were installed on-site. One soil sample was collected from each of the soil borings or test pits. All seven soil-boring samples and eight test pit samples were analyzed for gasoline, diesel, and oil. Three soil boring samples and four test pit samples were analyzed for arsenic, cadmium, chromium, lead, and mercury. Six soil boring samples and six test pit samples were also analyzed for four volatile organic compounds, and thirteen polycyclic aromatic hydrocarbons. Gasoline was detected in one (of seven) soil boring samples at a concentration above the MTCA Method A standard while diesel was detected in one (of seven) soil boring samples and oil in four of seven soil boring samples. All diesel and oil detections were below their respective MTCA Model A standards. Oil was detected in six of eight test pit samples. All detections were below the MTCA Method A standard. There were no detections of gasoline or diesel in any test pit sample. Chromium was detected in four of four test pit samples while lead was detected in two of four test pit samples. All chromium and lead detections were below their respective MTCA Method A standards. There were no detections of arsenic, cadmium, or mercury in any of the four test pit samples. Volatile organic compounds were detected in four of six soil borings while polycyclic aromatic hydrocarbons were detected in two of four soil boring samples.