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ATTACHMENT 1 <br /> FORWARD LANDFILL- RESPONSE TO COMMENT 6. VENT SIZING <br /> Comment #6: Tank 1: Normal Vent Properly Sized? - Per NFPA 30 2015 2 1.4.3.3 Normal <br /> vents shall be sized in accordance with either API Standard 2000, Venting Atmospheric and <br /> Low-Pressure Storage Tanks, or another approved standard. Alternatively, the normal vent <br /> shall be at least as large as the largest filling or withdrawal connection, but in no case shall it <br /> be less than I? in. (3.2 cm) nominal inside diameter. <br /> Applicable guidelines to vent question: <br /> NFPA 30 <br /> 21.4.3.3 'Normal vents shall be sized in accordance with ei- <br /> ther APT Standard 2000, lzentorg Atmasphm, and 7nwPrvcvmw <br /> Slanaye Tann,or another approved standard.Ahuxmtively,the <br /> nomoal vent shall be at(east as large as the largest filling or <br /> ,cithdrnwal conneniou, but in no case shall it be less than <br /> 1.25 in. (32 mm) nominal inside diameter. <br /> UL 142 <br /> 8 2 The normal venting shall be sized in accordance with Table 8.2 and shall be at least as large as the <br /> filling or withdrawal connection,whichever is larger, but in no case less than 1-V4 inch (30 mm) nominal <br /> inside diameter. <br /> UL 142 <br /> Table 8.2 <br /> Size of opening for normal venting <br /> Table 8 2 rev scN July 19,2013 <br /> Capacity of tank,U.S.gallons' Minimum diameter,nominal pipe all inches° <br /> Under 2,500 1-114 <br /> 2.500-3000 1-112 <br /> 3,001-'noun 2 <br /> 10,001 -20,000 2-112 <br /> 20.001 -35,000 3 <br /> 35,001-50,000 4 <br /> 50.001 -75,000 6 <br /> e For SI units,gallons(U S-gallons)x 3 8=L <br /> n See Standard for waited!and Seamless V ugM Steel Pipe ASME 936 10. <br /> 2\PROJECTS\Allied Waste\Fbrsam\SPCC Plan 2019\Tent\RTC\fonsam Landfill Tank Vent Question ATTACH 1.Updated Aug 2019 docs <br />