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DAILEY ENC,INEERING, LLC <br /> ENVIRONMENTAL ENGINEERINCi CONSULTING <br /> PO BoX 5 3l SHORELINE, WA 9 1 5 206- 95-9588 <br /> January 30, 2018 <br /> Site File <br /> 902 North Broadway <br /> Everett, WA 98201 <br /> • To Whom It May Concern: <br /> Based on our understanding of the definition of hazardous locations,the remediation <br /> system at 902 North Broadway is not in a hazardous location. <br /> The LEL of fresh gasoline is 1.4% (14,000 ppm). In our experience at sites where free <br /> product has not been observed in the subsurface(which is the case at this site),TPH <br /> concentrations in extracted soil vapor do not typically exceed 10%of the LEL(1,400 <br /> ppm). The highest l�own photo-ionization detector(PID)headspace reading from a soil <br /> sample collected at the site is 900 ppm, in August 2014. <br /> Based on our experience and on available data, it is our opinion that the remediation <br /> system is not capable of creating a hazardous atmosphere. <br /> Sincerely, <br /> Stephen M. Dailey <br /> Principal <br /> Email stephen@dailey-engineering.com■Fax:206-735-7978 � <br />