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PO Box 1928 STI SP-001 <br /> POWERS BENI94510 <br /> TEL 707707 333343400 STOCKTON EAST WATER DISTRICT STOCKTON,CA <br /> FAx 707 922 2284 <br /> ENGINEERING&INSPECTION,INC. www.powersei.com Tank 19 <br /> 4.3. Venting Analysis <br /> VENTING SELECTION (SP001, NFPA30, UL142, AP12000) <br /> 5' Tank Shape Horizontal Cylindrical <br /> Diameter or Width,D/W 8 ft <br /> Fill Height,H NA ft <br /> Length,L 28 ft <br /> Size of Largest Nozzle 4 in <br /> Product class Class 2 <br /> Capacity 10000 gal <br /> Wetted Area 603 sq.ft <br /> Venting Capacity Required,SCFH 392,000.00 SCFH <br /> Recommendations: <br /> Min.Nominal Pipe Size,Normal Vent 4-in or larger <br /> Min.Nominal Pipe Size,Normal Vent,for tank <br /> with manhole as emergency vent 2 in <br /> Min.Nominal Pipe Size,Emergency Vent 8 in <br /> Normal Vent: Normal Venting Capacity <br /> Number of Normal Vents 1 <br /> Size of Vent 1 on Roof(in) 2 in 27,650 SCFH <br /> Size of Largest Product In/Out Nozzle 4 in <br /> Normal Venting Size Ok? Insufficient <br /> Emergency Vent: Emergency Venting Capacity <br /> Number of Emergency Vents 1 <br /> Size of Emergency Vent 1 8 in 504,818 SCFH <br /> Existing Venting Capacity on Tank 1 540,968 jSCFH <br /> Existing Venting Capacity Ok? Sufficient <br /> Vent Options: 4-in normal vent,8-in emergency vent <br /> Conclusion: <br /> The tank is equippped with 1:2-in normal vent and 1:8-in emergency vent.The required venting <br /> capacity for the tank is 392000 SCFH.The largest nozzle on the tank is 4-in.The existing normal venting <br /> size is Insufficient.The existing total venting capacity of 540,968 SCFH is Sufficient.Venting system <br /> recommendation for this tank:4-in normal vent,8-in emergency vent <br /> Drawings <br /> STI-SP001 Stockton Water District Tk 19 Stockton,CA 2019 Rev O..docx Date Printed:214119 <br /> ©2018 PE&I Inc. <br /> Page 17 <br />