AMENDMENT W911N2-20-Q-0035 0002.pdf

JONATHAN CARROLL

LETTERKENNY CONTRACTING OFFICE

1 OVERCASH AVE., CCAM-ALK

717-267-8357

CHAMBERSBURG PA 17201-4150

SEE SCHEDULE

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 revise the Purchase Description to answ er questions from a prospective offeror.

1. CONTRACT ID CODE PAGE OF PAGES

J 1 4

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

16C. DATE SIGNED

BY 08-May-2020

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 W911N220Q0035

X 9B. DATED (SEE ITEM 11)

09-Apr-2020

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

08-May-2020

CODE

LETTERKENNY ARMY DEPOT

LETTERKENNY CONTRACTING OFFICE - ACC-RSA-LEAD

1 OVERCASH AVENUE, ATTN: CCAM-MLK, BLDG 2S

CHAMBERSBURG PA 17201-4150

W911N2 7. ADMINISTERED BY (If other than item 6)

4. REQUISITION/PURCHASE REQ. NO.

CODE W911N2

FACILITY CODECODE

EMAIL:TEL:

W911N220Q0035

SECTION SF 30 BLOCK 14 CONTINUATION PAGE

SUMMARY OF CHANGES

SECTION SF 30 - BLOCK 14 CONTINUATION PAGE

The following have been modified:

QUESTIONS & ANSWERS

Q1) What is the Dust Explosion Class (ST-1 / ST-2 / ST-3) of the material to be collected? This piece of information is critical to install the right equipment.

A1) ST-1 is the highest classification - dusts collected and tested had a Kst of 100 or below

Or Q2) What is the material that’s collected in the existing systems? If explosion class is not available, please provide type of dust and size distribution.

A2) ST-1 is the highest classification - dusts collected and tested had a Kst of 100 or below

Q3) Need additional photos of the following;

: existing control panels for each dust collector – both inside and outside of panel and confirmation the panels suitable for signal from NRV valve to shutdown system upon activation of the valve per NFPA 69.

: Photos of the new vacuum system installations at Bldg 350 that were shown as example at site visit.

A3) – Photos have been provided for the control panel of one of the systems (all others are nearly identical). No photos of the newer systems will be provided.

Q4) Explosion Vents – Scope of work in the solicitation does not list a requirement for explosion vents and the photos and site inspection do not show explosion vents on the collectors. To be compliant with NFPA-69, vents will be required. If added to the scope of work, will need drawing of existing collectors to calculate the size explosion vent required, KST rating of dust and Pred rating of existing collectors. If none of the above can be provided, dimensions of the duct collector mas be taken, Kst value must be adopted based on description of the dust and Pred must be adopted after consulting with dust collector manufacturer. Worst case scenario, standard industry value can be adopted (Pred=0.5bar)

A4) Explosion vents will be required for each of the systems (to be added to the PD). Sizing and location will be determined after award. The systems are designed for 29” Hg vacuum.

Q5) Dust collector media should be replaced by antistatic media if the dust collector is not equipped with antistatic media already.

A5) Anti-static replacement filters will be required (to be added to the PD).

Q6) All dust collector components must be bonded with ground straps to ensure conductivity of static electricity charge build up to ground rods. Are the existing systems grounded?

A6) Grounding straps and rods will be required (to be added to the PD).

Q7) Ground rods must be installed next to PD pump and dust collector according to local NEC code (if not grounded).

A7) Grounding straps and rods will be required (to be added to the PD).

Q8) Existing collectors – Need confirmation of material and gauge of metal (steel-stainless steel) for the existing dust collector in need of hopper replacement / repair at Bldg. 350.

A8) The hopper is hot rolled steel and stainless 7 gauge material.

Q9) Existing airlocks: NFPA-69 states the airlock be certified to prevent flame passage. Are the existing airlocks compliant? Read attached guidelines.

A9) The existing 8 vane airlocks are equipped with metal bodies and vanes.

Q10) The solicitation pages 9 and 10 list (3) line items but do not list which system (R8078 / R8079 / R8090 and R6752) is within each line item. Please advise.

A10) Line Items in Solicitation will be revised to show system #. System # R8090 was identified incorrectly, corrected to R8080

Q11) Can the explosion isolation valves be located within the building(s) or must they be located outdoors?

A11) No – they must be located outdoors

Q12) Does Letterkenny Army Depot assumes all responsibility for kst and pmax testing and has selected equipment according to the hazards being captured in the vacuum systems?

A12) Yes – max 100 Kst for any dusts measured/tested

Q13) Are all inlet and return vacuum lines 6” diameter? If not – what sizes are they?

A13) YES

Q14) Can Letterkenny provide any Pred (strength) of the vessels?

A14) The vessels were designed for 29”Hg vacuum.

Round 2 Questions;

Questions for new project at Letterkenny Army Depot –W911N220Q0035 5-6-20 Based on Addendum # 1 responses to questions dated 5-5-20.

Section SF30 – Block 14 Continuation Page

Q1. Answer # 4 advises explosion vent(s) will be required for each of the systems.

A. Has Letterkenny reviewed the addition of explosion vents with the manufacturer of the vacuum collector?

B. If yes – what are their recommendations regarding placement / location of the explosion vent(s) so as not to impact operation of the dust collector?

C. If no, will require information regarding the construction of the collector to properly size and select explosion vent. What construction/assembly drawings and owner’s manuals are available for the collector(s)?

D. As the collectors are to be modified in the field for the addition of explosion vents, who assumes product liability?

A1. The contractor will be required to design or have designed the explosion panel which will need to be sized by the manufacturer. The collector is designed for 29” Hg vacuum. The collector size of the baghouse is 3’-8” dia. X 4’-2” high. The explosion vents need to be designed around that criteria. The contractor will assume responsibility/liability.

Q2. Answer # 4 advises the systems are designed for 29” HG or approx. 395” WG.

A. Is this the max capacity of the vacuum pump or maximum design pressure of the collector or actual operating vacuum?

B. What is the vacuum relief pressure valve set point on each vacuum pump in WG?

A2. Maximum operating capacity of the vacuum blower is 1,400 cfm @ 12” Hg. The relief valve is approximately set at 13” Hg

Q3. Answer # 5 advises the filters for the dust collector must be replaced with anti-static replacements. There is no information regarding the collector other than the pictures provided.

A. Does Letterkenny have any of the standard replacement filters in stock?

B. If yes, need picture of filters with physical dimensions. Also, need quantity of filters required per collector.

C. Who is the manufacturer of the collector and do they offer anti-static bag replacements for the collectors?

A3. There are 4 each filters per unit. They are 8.375” ID x 12.75 OD x 30” long. The original part no. from the manual is JTS-GE-37778-CVA-4-1275-30-EO5928. The collector manufacturer is Griffin Environmental/JT Systems Inc.

(End of Summary of Changes)