7 World Trade Center legal correspondence, Apr 2002

NYC 9/11 Public Portal Document

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Dep^t Citywide Administrativ e Services Genera! Design Review Comme nts To: Glenn Pymento Sheet 1 of 3 A: Iccorpont Contract Number: Cotmiltani: Conseniini Ass. B:Kot Itic^^>ralcd Description; Mayor's Office Of Emergency 100 % Submittil ManagcmcnL cxplanatxoa) Reviewer: JOSEPH • Tide Mechanical Date; 4/17Z9S C: Clarificaii' MENASCE, PE Engineer. Required CdttSBX DW5. 1^71 Comments No. Spec , Pc.

________ _________________ HVAC____________________ _ 1 A-1-1 Please verify that the 6000 gal tank can be brouf ht inside the bullding,” rigged in place, that there is enough room for tiW welder to work, that it is in compliance with NYC code section 27-S29 whic h requires a 15" clearance all amund tank and that it is in corapUance with' 'TVS code, Subchapier B, part 1002.____________ '________________________ 2 A-1-1 Note #l~Water line is shown on-tfae plumbing drawing.-_______________ 3 MI.OI 1. What protectioa is provided against fill puxnf cavitation in the illustrated foci oil diagram? 2. Specify the size of the day tank on the drawirgs or in section 15190. Specify the make and model of the circulating' pump for the generators. 3. Shouldn't the vent line for the new emergency'fuH tank be higher than the tank? i . 4- Shouldn't tire fuel oil return from the day tank; be drained to the new storage tank?_______________________ _______________ ____ 4 Ml.07 Verify witii the GenerMor manufecturer the required opening to air cool the units? 5 M-1J3 1. Arc the Air Handlers in the buildmg serving 23rd floor on ergency generators as well? 2. Specify the make,, model and size of the coolir g towers. 3. Clarify in the schematic diagram the location c f the backflow preventers 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 ftesh air intake to 21.0-4 &5. Describe how to achieve free cooling.

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NYC-WTC_000173536