Amendment 6.pdf

W16ROE90913898

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT

Except as provided herein, all terms and conditions of the document referenced in Item 9A or 10A, as heretofore changed, remains unchanged and in full force and effect.

15A. NAME AND TITLE OF SIGNER (Type or print)

30-105-04EXCEPTION TO SF 30

APPROVED BY OIRM 11-84

STANDARD FORM 30 (Rev. 10-83) Prescribed by GSA

FAR (48 CFR) 53.243

The purpose of this Amendment is to:

a. Provide Question and Answ ers for INFORMATION PURPOSES ONLY. All other terms and conditions remains the same.

b. The contractor period of performance end date has decreased by 95 days from 635 days to 540 days on the 1442 in Block 11.

NOTE: Offerors must acknow ledge receipt of this amendment by the date specified in the solicitation (or as amended) by one of the follow ing methods: in the space provided on the SF 1442, by separate letter, by telegram or by signing block 15 below .

FAILURE TO ACKNOWLEDGE AMENDMENT BY THE DATE AND TIME SPECIFICED MAY RESULT IN REJECTION OF YOUR OFFER IN ACCORDANCE WITH THE SUBMISSION, MOFICATION, REVISION, AND WITHDRAWAL OF PROPOSALS (FAR 15.208)

1. CONTRACT ID CODE PAGE OF PAGES

J 1 14

16A. NAME AND TITLE OF CONTRACTING OFFICER (Type or print)

16C. DATE SIGNED

BY 24-Jun-2009

16B. UNITED STATES OF AMERICA15C. DATE SIGNED15B. CONTRACTOR/OFFEROR

(Signature of Contracting Officer)(Signature of person authorized to sign)

8. NAME AND ADDRESS OF CONTRACTOR (No., Street, County, State and Zip Code) X W912DS-09-R-0011

X 9B. DATED (SEE ITEM 11)

30-Apr-2009

10B. DATED (SEE ITEM 13)

9A. AMENDMENT OF SOLICITATION NO.

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

X The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offer is extended, X is not extended.

Offer must acknowledge receipt of this amendment prior to the hour and date specified in the solicitation or as amended by one of the following methods:

(a) By completing Items 8 and 15, and returning 1 copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted;

or (c) By separate letter or telegram which includes a reference to the solicitation and amendment numbers. FAILURE OF YOUR ACKNOWLEDGMENT TO BE RECEIVED AT THE PLACE DESIGNATED FOR THE RECEIPT OF OFFERS PRIOR TO THE HOUR AND DATE SPECIFIED MAY RESULT IN REJECTION OF YOUR OFFER. If by virtue of this amendment you desire to change an offer already submitted, such change may be made by telegram or letter, provided each telegram or letter makes reference to the solicitation and this amendment, and is received prior to the opening hour and date specified.

12. ACCOUNTING AND APPROPRIATION DATA (If required)

13. THIS ITEM APPLIES ONLY TO MODIFICATIONS OF CONTRACTS/ORDERS.

IT MODIFIES THE CONTRACT/ORDER NO. AS DESCRIBED IN ITEM 14.

A. THIS CHANGE ORDER IS ISSUED PURSUANT TO: (Specify authority) THE CHANGES SET FORTH IN ITEM 14 ARE MADE IN THE

CONTRACT ORDER NO. IN ITEM 10A.

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (such as changes in paying office, appropriation date, etc.) SET FORTH IN ITEM 14, PURSUANT TO THE AUTHORITY OF FAR 43.103(B).

C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY OF:

D. OTHER (Specify type of modification and authority)

E. IMPORTANT: Contractor is not, is required to sign this document and return copies to the issuing office.

14. DESCRIPTION OF AMENDMENT/MODIFICATION (Organized by UCF section headings, including solicitation/contract subject matter where feasible.)

10A. MOD. OF CONTRACT/ORDER NO.

2. AMENDMENT/MODIFICATION NO. 5. PROJECT NO.(If applicable)

6. ISSUED BY

3. EFFECTIVE DATE

24-Jun-2009

CODE

US ARMY CORPS OF ENGINEERS, NEW YORK

26 FEDERAL PLAZA, RM 1843

NEW YORK NY 10278-0090

W912DS 7. ADMINISTERED BY (If other than item 6)

4. REQUISITION/PURCHASE REQ. NO.

CODE

See Item 6

FACILITY CODECODE

EMAIL:TEL:

W912DS-09-R-0011

SECTION SF 30 BLOCK 14 CONTINUATION PAGE

SUMMARY OF CHANGES

The following have been added by full text:

AMENDMENT 0006

NOTICE TO OFERORS RFP NO. W912DS-09-R-0011

Failure of the Offeror to Acknowledge receipt of Amendment No. 5 this Amendment in Item 19 of Standard Form Department of the Army, NYD 1442 (Pg. 2) may Corps of Engineers result in REJECTION of New York, NY 10278-0090 the Offer.

AMENDMENT NO. 5 TO SPECIFICATIONS ISSUED 27 APRIL 2009 FOR

Fuze Engineering Complex at Picatinny Arsenal, Picatinny, New Jersey

TO OFFEROR

1. CHANGES TO SOLICITATION

Section 00 80 00

Paragraph 1.a: Delete Paragraph 1.a and replace with the following:

a. The Contractor shall be required to (i) commence work under this contract within Ten (10) calendar days after the date the Contractor receives the notice to proceed, (ii) prosecute the work diligently, and (iii) complete the entire work ready for use not later than 540 days after the date the Contractor receives the notice to proceed, except in case the Contracting Officer (COR) determines that seeding is not feasible during the construction period, the Contractor shall accomplish such seeding in the first planting period following the contract completion date. This action will not operate to extend the performance time for the balance of the work. The Contract must provide adequate work crews to insure timely completion of the work by the time frame specified above. The time stated for completion shall include final cleanup of the premises.

The following items are required to be completed as indicated:

Building 6 shall be completed within 450 calendar days after receipt of notice to proceed.

Section 10 28 13

Delete paragraph 2.2.6 “Shelf, Metal, Heavy Duty (SMHD),” in its entirety.

Delete paragraph 2.2.7 “Shelf, Metal, Light Duty (SMLD),” in its entirety.

Section 10 28 13

Add the following paragraph:

Paragraph “2.2.10 Sanitary Napkin and Tampon Dispenser (SNTD)

Provide sanitary napkin and tampon dispenser recessed. Dispenser, including door of Type 304 stainless steel that dispense both napkins and tampons with a minimum capacity of 20 each.

Furnish dispensing mechanism for coin operation. Provide coin mechanisms with minimum denominations of 25 cents. Hang doors with a full-length corrosion-resistant steel piano hinge and secure with a tumbler lock. Provide keys for coin box different from the door keys.”

ADD SPECIFICATION SECTION 08 14 00 in its entirety

2. DRAWINGS

Drawing 4A-101:

Add sketch SK A-2.3

Drawing 3A-101:

Add sketch SK A-2.2

Drawing 2A-101:

Add sketch SK A-2.1

3. ATTACHMENTS

A. Revised drawings and specifications as noted above.

B. Fume Hood Catalog cut sheet.

C. Ammo Bunker Photo’s D.Add Lighting Fixture Schedules Attached.

4. ANSWER TO CONTRACTORS QUESTIONS

The following questions and answers are provided for information only. Nothing contained in the questions and answers amends or revises any provisions of the solicitation.

Questions and Answers

FOR INFORMATION PURPOSES ONLY (PART II: Questions 1 – 50)

1. Question: The finish schedule 6A-601 calls for ceramic tile and paint on the wall of the toilet rooms. There is no indication of the height or pattern of the wall tile.

Answer: The intent is for full height ceramic tile on the toilet/urinal fixture walls and the immediate adjacent (for cleaning and sanitation). The tiles are to be a consistent mix of field color with accent colors placed at random and according to the tile type and percentage.

Field color 70%; accent colors 15% each. The overall effect should be a consistent look across the tiled areas. See drawings, SK-A1.1 and SK-A1.2 for information (Attachment 4).

2. Question: The building 3215 structural timber and wood contractor has requested a one week bid date extension as they need more time to do preliminary engineering design.

Answer: See Standard Form 30 this amendment for new proposal due date.

3. Question: Refer to Bldg 3125. What is the minimum clearance from the 0’-0” elevation to the underside of the hoist beam at the center of the building under the ridge?

Answer: Maximize the clear distance with the design. There is no clear minimum.

4. Question: Refer to Bldg 3125. Can the wall panels be constructed so they fit between the wall beams as opposed to being connected to the outside of the beams? The designer notes they can develop diaphragm action within the wall frame if they can run the sheathing in the same plane as the wall panels, wall beams (girts) and column frames.

Answer: The wall sections show the wall panel, girts and sheathing within the column cavity. Exterior finishes shall not be interrupted.

5. Question: Refer to Bldg 3125. Will metal connected roof trusses be permitted as well as steel connections to connect the columns to the foundation and the columns to the trusses?

Answer: Metal connections are permitted.

6. Question: For building 6, the lighting fixture schedule 1E-801 does not include the TM-

5 and TM-6 fixtures which show on 1E-001. Please provide fixture information.

Answer: See schedule attached, types TM5 and TM6

7. Question: For building 1215 & 1216, there are explosion proof light fixtures indicated for both inside and outside the buildings. Please provide fixture information for these fixtures.

Answer: See schedule attached, types “EXP1” for interior pendant fixture and type “TM4” for exterior pole light.

8. Question: Review and respond to the following questions regarding the design of Bldg

3215.

A. Wind exposure condition: B, C or D B. What is the building width out to out studs? The 55’-1 ½” dimension and grid 1&

4 locations shown on the plans are ambiguous.

C. At exterior wall, is it acceptable to have the outside faces of stud, columns and girts all on one common line?

D. Is there a minimum clearance required to the bottom of the crane rail beam?

E. At gable ends, what is the required overhang dimension from the exterior face of studs?

Answers:

A. Wind exposure condition is C.

B. 55’-1 ½” + 2’-8 ¾” + 2’-8 ¾” = 60’-7” C. Yes D. No, however user wants maximum clearance possible.

E. 2’-0”

9. Question: Refer to Bldg 3215. What minimum clearance is required from 0’-0” elevation to the underside of the hoist beam at the center of the building under the ridge.

Answer: None, user wants maximum space. The ridge height is fixed.

10. Question: Refer to Bldg 3215. Can the wall panels be constructed so they fit between the wall beams as opposed to being connected to the outside of the beams. We can develop diaphragm action within the wall frame if we can run the wall sheathing in the same plane as the wall panels, wall beams (girts) and column frames.

Answer: Yes.

11. Question: Refer to Bldg 3215. Will metal connected roof trusses be permitted as well as steel connections to connect the columns to the foundation and the columns to the trusses.

Answer: Yes.

12. Question: Per drawing 1A-101 and the door schedule, door 100A is to be furnished and installed as a new door. Per note 6 on drawing 1AD-101, the door still remains. Please clarify if this door is to be replaced or if the existing door is to remain.

Answer: Existing door is to be removed and replaced with 100A, note 6 on 1AD-101 will be corrected and included in addendum.

13. Question: Reference drawings 3A-401 & 3A-511. No exterior sheathing is called for on this building. I s this the intended design or is exterior sheathing required behind the cedar siding & cement fiber broad? If exterior sheathing is required, please advise what is to be installed (i.e. densglass, plywood, etc.).

Answer: There will be exterior sheathing as part of the pre-engineered wood buildings structure. The sheathing is part of the lateral system and is to be designed by the PEWB manufacturer. The cedar siding and cement fiber board are to be attached out board of this.

14. Question: Drawings 1A-101 key note 1, 1A-102 key notes 4 and 5, 1A-103 key notes 7 and 8 and 1A-104 key note 8, detail fire extinguishers with recessed and semi-recessed cabinets. Specifications are not provided for these items. Please provide specifications for the fire extinguishers and fire extinguisher cabinet.

Answer: Fire extinguisher cabinets are covered under specification section 05 50 00 Metal:

Miscellaneous and Fabrications.

15. Question: Section 10 26 13 provides specifications for Wall and Corner Guards;

however, there are no wall guards and/or corner guards shown within the drawing set.

Please clarify where corner guards are to be installed.

Answer: Corner guards are to be installed on “outside corners” of partitions exposed to circulation paths.

16. Question: The exterior wall details for Bldg 6 do not call for any exterior sheathing behind the masonry or metal panels. The details show the sheet applied vapor and air barrier being attached directly to the metal studs. Is this the intended design or is sheathing required at the exterior of the building? If sheathing is to be installed, what is the material (i.e. densglass, plywood, etc.)

Answer: The design is for ½” glass mat sheathing attached to the studs. The sheet applied air and vapor barrier applied over the sheathing.

17. Question: Reference detail C2/1A-514. What is the metal panel attaching to? It appears that the screws for these panels are attaching to insulation. Is this the intended design?

What is the material behind the metal panels.

Answer: The design intent is Z-clips 16” O.C., ½” glass mat sheathing attached to Z-clips, permeable air barrier over the sheathing and concealed metal panel clips attached through the Z-clips.

18. Question: Detail A2 on drawing 5A-301 shows the new roof to overhang the existing building. Detail B4 on drawing 5A-301 shows the same detail with no overhang. Is an overhang required at this location? If so, please revise detail B4 to show the proper overhang.

Answer: No extended overhang is required at this location. Follow detail B4/5A-301.

19. In DWG No. 1A-101, on both side of corridor leading to ramp shown as “SM” type of partition. But in partition types details drawing 6A-611 & 6A-612, there is not any “SM” type partition detail. Please clarify.

Answer: “SM” should read “1S”. Refer to 6A-612, A.4.

20. Question: In DWG 1A-101, the “OL” type partition is shown for Director’s Conference

Room 150, which make confused according to partition detail shown in 6A-612, what is the height of the partition and after certain height, it turn to be a ceiling of the same room or adjacent rooms. Kindly elaborate about this or furnish more details.

Answer: Director’s Conference Room 150 requires a constructed ceiling per secure room standards. The partition turns inward to become the ceiling of the Director’s Conference Room 150, creating a secure “box” for the room. The ceiling height is 10’-0” AFF, refer to

1A-111, RCP.

21. Question: In DWG. 1A-101 to 1A-104, certain partition walls are shown with tags, but what about other partition where there are no tags. It is confusing to quote for partitions which do not have tags.

Answer: Sheet notes identify typical partitions. “Partitions are XX UON” unless otherwise noted. If a particular partition does not have a tag, it will be the partition identified on the sheet note.

22. Please provide specifications for wood doors.

Answer: Specifications will be provided in future Addendum.

23. Question: Plan A1-571 key note#6 “Partition mounted sanitary toilet tissue dispenser. Is this a sanitary napkin disposal”?

Answer: Correct, the key note #6 should read “Partition mounted sanitary napkin disposal”.

24. Question: Key note#12 calls for 24”X36” grad bars. They will not be ADA compliant.

Answer: Grab bars are to be ADA compliant on the wall behind the toilet. The grab bar must extend a minimum 36” from the side wall on the wall adjacent to the toilet. The grab bar must extend a minimum 52”.

25. Question: What size is the projection screen?

Answer: 62”high X 92”wide viewing area.

26. Plan detail C2 on 1A-581 refers to bldg 6A. Is there a bldg 6A?

Answer: There is no building 6A, the existing building 6 and addition are referred to as one building, Bldg 6. The detail title will be corrected to read “6”.

27. Question: Plan #2A-101: Key notes #12 and #13 makes no sense. What size, type and quantity of grab bars are required? None of the ones listed are ADA compliant.

Answer: Grab bars are to be ADA compliant on the wall behind the toilet. The grab bar must extend a minimum 36” from the side wall on the wall adjacent to the toilet. The grab bar must extend a minimum 52”.

28. Question: I don’t see any shelves on the plans. (Spec Sect. 10 28 13, 2.2.6 and 2.2.7) Please clarify.

Answer: There are not any shelves in the toilet rooms. The specification section will be revised to remove 2.2.6 and 2.2.7, see attached spec sheet in this amendment.

29. Question: What type of mirrors? Are they frameless, angle framed or channel framed?

Answer: Channel framed mirrors.

30. Question: The plans call for sanitary napkin/tampon vendors, but there is no specification.

Answer: See attached Spec Section 10 28 13 attached to this amendment.

31. Question: Will the utility perform mark-outs for existing utilities (call before you dig) since this is a federal complex or is the contractor responsible for hiring a company to locate existing utilities.

Answer: The utility companies that own infrastructure on the base will mark out the approximate locations. Picatinny DPW will mark out approximate locations of their infrastructure. Drainage and utility note#3 requires the contractor to confirm utility locations at crossings through test pit excavation.

32. Refer to drawing 1E-001:

A. Sheet note A refers to No. 1E-801 lighting fixture schedule for fixture specification.

Types TM5 and TM6 are not shown on this fixture schedule. What are the specifications for these fixtures?

B. How is connection to existing SREC overhead lighting distribution system accomplished? Does conduit have to be run up pole? Do SREC personnel make final connection? Please provide details.

C. There is a label fixture type PL1 in Copy/Mail Room 152, but no fixture is shown. Is there a fixture or is the label incorrect?

D. In the Director’s Conference Room 150, there is an 8’ “PL” type fixture labeled PL2.

Per the fixture schedule, type PL2 is 12’. Is this fixture an 8’ PL1 or 12’ PL2?

Answer:

A. Refer to RBC #16, question #1 response. PDF schedule attached for fixture types TM5 and TM6 specification.

B. Circuit for parking lot pole lights, conduit and conductor shall extend the pole up to accommodate final termination by SREC. SREC will be installing a pole mounted circuit breaker enclosure with line side tap to existing overhead lighting circuit.

Circuit breaker load side connection shall be made by SREC.

C. Copy/Mail 152. Provide four type DC1 down light fixtures. Plan reference text “PL1” is not applicable.

D. Provide type “PL1”, 8ft length light fixture.

33. Question: Refer to drawing 1E-102. In Conference Room 132, there is a 16’ type PL fixture labeled PL2. There is no 16’ type PL fixture listed in the fixture schedule. Is this fixture a 12’ PL2 or 16’?

Answer: Conference Room 132. Provide fixture type PL7, 16ft length light fixture.

34. Question: Refer to drawing 1E-103. In Circulation Area 102, there is a 3 Way Switch drawn as if to connect with switch and fixtures building section 1. Drawing 1E-101 does not seem to have a corresponding 3 way switch. What lighting does this switch control?

Answer: Circulation Area 102: Lighting pathway between circulation area 101 and circulation area 102 exit doors shall be connected to a 3-way switching circuit. Two 3-way type switches are required along this path. The single pole switch indicated on Drawing 1E-101 at corridor shall be type 3-way and located need corridor entry door leading from circulation area 101.

35. Question: Refer to drawing 1E-104. In Prototype Assembly Lab #194 there is a 2X4 fixture labeled F4. Type F4 is a 1X4 fixture. Is this fixture type F1 or F4?

Answer: Lab #194: Fixture nominal dimension shall be 2x4. Provide light fixture type FL1.

36. Question: What is the specification for the “explosion proof rated light fixture” in Bldg 1215/1216?

Answer: Bldg 1215/1216: Refer to sheet no. 2E-601, provide light fixture type EXP1.

37. Question: Fume hoods related questions.

A. Please provide elevation of the fume hoods for additional information.

B. The fume hood specifications do not clarify what the full requirements are for the base cabinets under the hoods. Are safety cabinets such as acid storage and/or base cabinets under the hood?

C. Are all three (3) hoods to be the same size (48” wide)?

D. Specifications call for stainless steel interior and work surface. Is this interior liner supposed to be welded with covered corners or can it be a standard stainless sheet lining?

Or is a polyresin liner with epoxy countertop acceptable?

E. Specifications call for tempered safety glass. Fume hoods are made with laminated safety glass as industry standard. Is this acceptable?

F. Specifications call for gas, air and vacuum fixtures. Does this mean one of each and should they be pre-piped at the factory?

G. Is there casework going into the laboratories. None is shown on the drawings?

A. See attachment 1 for fume hood for elevation.

B. Basic base cabinet is sufficient, no safety cabinet required.

C. All hoods are same size (48”); however, there are four (4) cabinets not three (3).

D. Liner shall be epoxy-coated steel liner.

E. Tempered glass is required per specification.

F. There shall be no gas, air and vacuum connections for fume hood. Please see updated specification in forthcoming Addendum.

Note: Refer to updated fume hood specification in forthcoming admentment to address items above.

38. Question: We need clarification reading section 00 22 11 clause 1.5. This clause mentions that our proposal has to have 3 volumes, i.e. Volume I-Technical, Volume II-Cost Proposal and Volume III-Subcontracting Plan. Clause 3 of this specification section gives a description of what information is required to be furnished in Volume I and II, there is no information regarding Volume III. Please clarify Volume III needs to be submitted at all and if yes, specify what information we need to include in this section. Also, clause 2.1 of section 00 22 11 mentions that the 3 volumes to be submitted should be Vol. I Technical, Vol. II Small Business Utilization and Vol. III Price Proposal. This contradicts with information given in 1.5. Please clarify.

Answer: Refer to amendment No. 2

39. Provide list of approved Pre-fabricated Engineered wood structures manufacturer for bldg 3215. Reference drawings 3A101 to 3A511.

Answer: Any manufacturer who can comply with the specifications is acceptable.

40. Question: What manufacturer is the basis of design for the ultra-high speed Sprinkler System described in Specification Section 21 13 19.00 10? Some manufacturers have expressed interest but are unable to meet all requirements of the specification.

Answer: Pyrotech International was used as the basis of design for the ultra-high speed Fire Sprinkler system described in Specification Section 21 13 19.00 10 to meet the requirements of UFC 3-600-01 section 6-10.

41. Question: Drainage and Utility Note #1 on drawing C-001 states that the “Site Contractor is responsible for all interior fiber optic installation.” Confirm if contractor is responsible to provide fiber optic installations in the buildings or if this will be completed by others. Confirm contractor’s scope of work.

Answer: Contractor shall be responsible for providing fiber optic cross connect equipment termination at service entrance TR rooms. Picatinny plant fiber optic distribution system shall be provided by others. Refer to specification 27 10 00, part 2.3 for cabling requirements.

42. Question: We are unable to locate a specification for the overhead door shown on sheet 3A-201 building 3125.

Answer: Refer to specification section 13 34 20 pre-fabricated engineered wood structures for sectional over head door, 2.9.

43. Question: Entry mats are specified; however no details or locations are shown on the plans.

Answer: Refer to A1/1A-404 and A3/1A-404 for vestibule entry mats depressed into structural slab. Typical for vestibule 181 and vestibule 183.

44. Question: Sheet 6A-601, finish schedule. What does SC & FG stand for and is there a spec?

Answer: SC = Sealed Concrete. FG = Floor Grating (Entry Mat). Refer to G-002 for abbreviations list.

45. Question: We can’t locate any fire extinguishers in bldg 1516 & 3215. Are they required, if so how many?

Answer: Bldg 1516: 1 fire extinguisher on surface mounted hanger.

Bldg 3215: 2 fire extinguisher on surface mounted hanger.

Bldg 1215 7 1216: 1 fire extinguisher on surface mounted hanger.

Their locations will be shown in the Addendum.

46. Question: Fire extinguishers and fire extinguisher cabinets are not shown within buildings 1516, 3215, 1215 and 1216. Please advise if fire extinguishers and/or cabinets are required and if so provide locations and quantities.

Answer: Bldg 1516: 1 fire extinguisher on surface mounted hanger.

Bldg 3215: 2 fire extinguisher on surface mounted hanger.

Bldg 1215 7 1216: 1 fire extinguisher on surface mounted hanger.

Their locations will be shown in the Addendum.

47. Question: Provide a model number for the storm water quality unit located on page 1C- 010.

Answer: The structure will be Vortechs Model 7000, 8’W X 14’L.

48. Question: Refer to Specification Section 08 56 46.10 20.

A. Identify the exact quantity of signal lines entering each RF enclosure.

B. A modular demountable shielding system is requested per the documents. Typically RF performance is 10-18GHz at 100dB. Paragraph 2.1.1.a1 radio Frequency Interference Attenuation is 100dB from 1KHz to 40GHz. The modular shielding system was not designed for this. If a change in RF doors (from single knife edge door to double knife edge door) and honey comb air vents will be (from 3/16 to 1/8 cells) required. 100dB to 10GHz is typical for the system described. Please clarify.

C. In paragraph 3.10 Field Testing. SELDS testing is called out. SELDS testing is not normally called out for testing modular cell type shielding systems. SELDS is the recommended way of testing welded systems. Verify the testing method. Industry standard for RF shielding systems is MIL-STD-285 (Suspended but still used) or

IEEE299.

A. Identify quantity of signal lines entering each RF enclosure: Provide filtering capable of supporting four single lines with provision for a 1” threaded conduit hub penetration of shielded enclosure.

B. System performance: Basis of design is ETS Lindgren series 81 shielding systems or equivalent.

Magnetic Field: 20dB @ 1kHz; 56dB @ 10kHz; 100dB @ 200kHz

Electric Field: 110dB from 200kHz through 50MHz

Plane Wave: 110dB from 50MHz to 1GHz

Microwave: 100dB @ 10GHz

C. Section 3.10 Fielding Test: Comply with IEE299 (as applicable to canceled MIL-

STD285 which is client standard)

49. Question:

A. I found one item of concern on spec section 08 56 46.10 20 page 5 section 2.1.1 paragraph A item #1. 100dB at 1 KHz is acceptable for electric and microwave but not at a magnetic. Typically for the room type specified the performance at 1 KHz magnetic is about 20dB graduating up to 100dB around 200 KHz. I do not believe IEEE-299 required 100dB at 1 KHz magnetic in any case.

B. I highly suggest that the filters shown on drawing 2E-401 be mounted on the shield not the parent room wall. Access thru the parent room wall via a door of some sort.

C. On drawing 2E-401 elevation A4 there are typically three filters one for lighting and

2 for outlets. Actually three separate filters side by side. Elevation seems to show a larger 9” wide filter for the 2 power circuits.

D. I suggest the elimination of the parent room wall between the rooms. Also, the front wall is not installed until after the 3 shield rooms are finished so perfect alignment of the non shielded exterior door can take place as well as the opening for the filters.

E. Please note there is a gap of about 1” between the parent room interior wall and the exterior of the RF shielded wall that can be seen at the door frame edges. You may want to close it up after the parent room wall is in place.

A. Shielded Room System performance: Basis of design is ETS Lindgren series 81 shielding systems or equivalent.

Magnetic Field: 20dB @ 1kHz; 56dB @ 10kHz; 100dB @ 200kHz

Electric Field: 110dB from 200kHz through 50MHz

Plane Wave: 110dB from 50MHz to 1GHz

Microwave: 100dB @ 10GHz

B. Concur; filters shall be mounted on the shield enclosure wall. Corridor outer masonry wall shall be fire rated. Provide intermediate fire rated NEMA-1 enclosure that is mounted to the shield wall to house the filters. Enclosure cover may be either door construction or gasket removable panel.

C. Concur there will three filter units. Detail A4 show conditions with receptacle unit as one unit with multiple circuit input/output capability. Three individual filter units will also be acceptable. Non-concur, this solution is not acceptable. Masonry wall required for explosion proof safety rating.

D. Construction of front wall: Contractor may determine the means and method used to construct the space. The methodology shall be provide a fully function shielded room in accordance with the design performance standards indicated in the contract documents.

E. 1” gap between exterior wall and shield: Concur, this gap shall be filled. Contractor shall provide conventional architectural metal trim piece or equivalent to fit-out the corridor door frame to align.

50. Question: Please provide photos of ammo bunker.

Answer: See Attachment 2 and Attachment 3 for photos of bunker.

SECTION 00010 - SOLICITATION CONTRACT FORM

The contractor period of performance end date has decreased by 95 days from 635 days to 540 days.

(End of Summary of Changes)