Plan Review Comments for 7 WTC, April 1998

NYC 9/11 Public Portal Document r.kjr *

Dep^t Citywide Administrativ^ Services Generol Design Review Comments To; GlennPymento Sheet I of 3 1 A: Incoipmac: Contract Number; Consxiltant: Consentini B:Not Inc^^nnted Description: Mayor's Office Of Emergency 100 VoSubmii Management explanation) Reviewer: JOSEPH Title Mechanical Date; 4/17Z9S C: Clarificatio: MENASCE, PE Engineer. Required OOftHC IWO. NO/ Spsc , Pg , COMMZNTS ITo.

_________ ________________ HVAC .1 A-1-1 Please verify that the 6000 gai tank can be inside the balding. rigged in place, that there is enough room for the welder to work, that it is in compliance with NYC code section 27-S29 whic h requires a 15" clearance all around tank and that it is in compliance with' <YS code, Subchaptcr B, part 1002.____________ _______ __________ 2 A-1-1 Note #1; Water line is shown on-t^ plumbing drawing.- 3 MLOl 1. What protection is provided against fill puny cavitatioii in the illustraxed fuel oil diagram? 2. Specify the sine ofths day tank on. the drawixgs or in section 15190. Specify the make and model of the circulatinj; pump for the generators. 3. Shouldn't the vent line for the new emergency fud tank be higher than ihetank? 4. Shouldn’t the fuel oil return &om the day tank be drained to the new storage tank?_________________________ 4 Ml.07 Verify with the Generalcr manufocturer the requu^ opening to air cool the units? _________________________ ________________ ■ 5 M’1.23 1. Arc the Air Handlers in the building serving tlfe 23rd floor on emergency generators as well? 2. Specify the make, model and size of the coolit g towers. 3. Clarify in the schematic diagram the location < >f the backflow preventtrs to supply make up water to the cooling towers 4. Verify the need to have exhaust fans for the ot icr conference rooms, like the one facing Verscy Street. 5. Clarify the need to provide fresh air intake to >10-4 &5, Describe how to achieve free cooling.___ _______________

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