Proposal cover letter for OEM design services, June 1998

NYC 9/11 Public Portal Document

JUN. 2g. iggs 1:O2PM SWANKE HAYDEN CONNELL ARCHITECTS M 3362 ?. 3/4 Catnenne uilibem - suiveratem Properties, me. SHCA Project No. 5576CD " Emergency Operations Center-7 Worid Trade Center: Proposalfor Additional Architectural and Engineering Design Services: Upgraded Revised ‘Protective Wall' Design and Scope Revisions; Cost Reduction Scope Changes"

Date: June 25,1998

Scope of Work • Work with DCAS/OEM to establish the revised “protective wall” design criteria required for this project • Develop alternate design studies of wall assemblies and study their feasibility for implementation. Wali assemblies will be studied against the revised design criteria, die impact to the base building exterior wall assembly (in terms of access and ventilation), structural (in terms of floor loading and anchorage) and mechanical systems. • Upon selection of a proposed wall assembly, review and obtain approval of the assembly from DCAS, OEM, Silverstein Properties, Inc. and the Port Authority. * Revise and coordinate the approved 100% C. D. drawings and specifications dated 05-04-98 and issue a bulletin for bidding. Scope includes full coordination with structural, mechanical, telecommunications, audio-visual, radio, security, etc. • Revise architectural and engineering C.D. set to incorporate items 1 .a, 1 .b. 1 c, 2.1,2.2,3 & 4 as modified per SHCA's meeting with DCAS on June 22,1998 in which DCAS clarified the scope of work requested. A summary of die scope of work is as follows:

l.a Per previous review with Silverstein Properties, lnc.(SPl), SPI will allow the use of BX Cabling instead of EMT Conduit specified in the C.D. documents in accordance to the PA/7 World Trade Center Mechanical Design Guidelines, Specifications and Standard Details- Electrical, Communications. l.b Electrical & Telecommunication C.D. will be clarified to show delineation of scope for the telecommunication cabling between Ambassador and DolTT. l.c Eliminate the requested Audio-Visual Equipment in accordance to Exhibit “A” of the DCAS letter. 2.1 Per the DCAS meeting, the steel vault construction including the safe door designed to Vikonics, Inc. specifications for Room 23-16 is eliminated. Standard office foil-height drywall partitions will be utilized for this room. Per the DCAS meeting, all bullet-resistant fiberglass shielding shall be removed in all spaces except the “protective wall" where it will be shown as an add/altenrate.

2.2 Eliminate all bullet-resistant doors and frames with standard hollow metal doors and frames as requested. Similar blast resistant doors will be utilized as part of the “protective wall” only. 3. Eliminate folding partitions and support steel and replace with acoustically rated standard drywall partitions for Rooms 23-44,23-45 & 23-46 as requested. 4. See item 2.1 above. 5. The C.D. revisions to the upgraded ‘protective wall’ designed to withstand 150 mph wind loads are substantially complete. SHCA will make revisions under this agreement to incorporate the additional DCAS requested revisions as directed in their June 18,1998 letter. Per the DCAS meeting, the scope or extent of the wall remains per the upgraded design with the following revisions:

a. Wall shall be designed to meet wind pressures 90 mph wind loads instead of 150 mph loads. b. Motorized air dampers shall be installed in the wall per the “upgraded” wall with an alternate deduct for manually operated air dampers. c. Doors shall be “upgraded” to meet 90 mph wind loads and folly weatherstripped. Wt\SS7m\OEMOOCSlFSB\BILVERaTBIN QB-IS-BB SSTBCC-CO PROPOSAUDOC

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