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rok <br /> APEX <br /> June 25,2018 <br /> Paul Cumett <br /> Clearcreek Contractors Inc. <br /> 3203 15th Street <br /> Everett,WA 98201 <br /> Re: Claremont Shopping Center <br /> PECO 2018-01 <br /> Dear Mr.Cumettt: <br /> We are writing to clarify the construction of the soil vapor extraction(SVE)system at the Claremont Shopping Center. <br /> This system does include components that are explosion-proof and typically found in systems in a Class I <br /> environment. However,in this case,Class I environments will not be encountered based on the physical properties <br /> and documented concentrations of Tetrachloroethene(the compound of interest). Additionally,the operating <br /> environment of the system is an exterior application in a shopping center. These land uses do not result in <br /> hazardous atmospheres. <br /> In summary,the system is ready for inspection and should not be considered a Class I application. <br /> Sincerely, <br /> 4...I I/ , . <br /> ,- --V - .-:---:, t_3- <br /> John Foxwell Mike Stevens <br /> Principal Principal Engineer <br /> r <br /> 3015 SW First Avenue, Portland, OR 97201 T 503.924.4704 F 503.943.6357 www.apexcos.corn ,‘,C.-:.—'' <br /> ' <br />