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Alternate Material(s) and/or Method(s) Application <br /> Marion County Public Works <br /> Marron 5155 Silverton Rd NE <br /> County Salem OR 97305 <br /> OREG ors <br /> Phone: (503) 588-5147 Fax: (503) 588-7948 E-mail: Building(dco.marion.or.us <br /> DESCRIBE WHY, HOW,ETC., THE PROPOSED ALTERNATE IS EQUIVALENT AND MEETS THE <br /> INTENT OF THE CODE IN TERMS OF"STRENGTH, EFFECTIVENESS,FIRE RESISTANCE, <br /> DURABILITY, HEALTH , AND SAFETY": <br /> OMSC 502.14 requires a source capture system for areas in which stationary motor vehicles are operated.The fire department will only <br /> operate engines inside the building for the duration necessary to move the vehicles in and out of the building.Therefore, exception tt3 shall <br /> apply and a source capture system is not required.The apparatus bay will be exhausted in accordance with OMSC 404 for enclosed parking <br /> garages.A small exhaust fan will operate constantly at a standby airflow of 0.05 CFM/SF and a large exhaust fan will operate at an airflow <br /> of 0.75 CFM/SF upon a detection of high CO or NO2 levels in the apparatus bay. Makeup air will be provided low and exhaust will be provided <br /> high to flush air through the space and remove vehicle exhaust. <br /> LIST SUBSTANTIATING EVIDENCE(REPORTS, STUDIES, ETC)—ATTACH COPIES OF DOCUMENTATION <br /> Attached are standard operating procedures from the fire department which notes that engines will only be operated inside the building for the duration necessary <br /> to move the vehicles in and out of the building. <br /> I hereby request approval to use an alternate material(s)and/or method(s)from that required by code as described above. j <br /> Signed: ihtumas Kelly, PE Date: 12/19/2024 <br /> OFFICE USE ONLY <br /> R Approved <br /> 7 Approved with conditions <br /> 7 Denied <br /> Signed: Chris Trussell Date: 1-3-25 <br /> Page 2 of 2 J G:FORMS\BLDG\B-37Altcmatc Material or Method Request doe <br />