C-05_AMD_03_W912DR18B0002-0003.pdf

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

NORTH CLEARWELL MAINTENANCE IMPROVEMENTS, WASHINGTON AQUEDUCT DIVISION, WASHINGTON, DC

The purpose of this amendment is to incorporate the follow ing:

1) Issue revised Price Schedule - see attachment

2) Issue changes to Specif ications as listed - see follow ing page

3) Issue revised Draw ing Package - see attachment

4) Issue Questions and Answ ers to RFIs - see follow ing page

5) All other terms and conditions remain unchanged

1. CONTRACT ID CODE PAGE OF PAGES

1 8

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

16C. DATE SIGNED

BY 15-Dec-2017

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 W912DR18B0002

X 9B. DATED (SEE ITEM 11)

01-Dec-2017

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 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

15-Dec-2017

CODE

USACE, BALTIMORE DISTRICT

10 S. HOWARD ST

ROOM 7000

BALTIMORE MD 21201

W912DR 7. ADMINISTERED BY (If other than item 6)

4. REQUISITION/PURCHASE REQ. NO.

CODE

See Item 6

FACILITY CODECODE

EMAIL:TEL:

W912DR18B000200030003 TO W912DR-18-B-0002

EFFECTIVE DECEMBER 15, 2017

SECTION SF 30 BLOCK 14 CONTINUATION PAGE

SUMMARY OF CHANGES

SECTION 00 21 13 - INSTRUCTIONS TO BIDDERS

The following have been added by full text:

AMENDMENT 0003

SOLICITATION:

1. SECTION 00 10 00 – PRICE SCHEDULE: Delete the previously issued Unit Price Schedule and substitute the attached revised Unit Price Schedule, dated 12-14-2017

SPECIFICATIONS:

2. TABLE OF CONTENTS: Under Division 22 – Plumbing; Delete “22 00 00 PLUMBING, GENERAL PURPOSE”

3. SECTION 07 92 00 – JOINT SEALANTS: Delete in its entirety as originally issued and substitute the attached revised Section.

4. SECTION 22 00 00 – PLUMBING, GENERAL PURPOSE: Delete this section in its entirety.

DRAWINGS:

5. Delete Drawing Package in its entirety as originally issued and substitute the attached revised

Drawing Package dated December 14, 2017.

GENERAL:

6. Attached are Questions and Answers and are for information only.

ATTACHMENTS:

1) Revised Price Schedule, dated December 14, 2017

2) Revised Section 07 92 00, Part 2.1.4, dated December 14, 2017

3) Revised Drawing Package, dated December 14, 2017

W912DR18B0002

QUESTIONS AND ANSWERS

FOR INFORMATION ONLY (FIO)

NORTH CLEARWELL MAINTENANCE AND IMPROVEMENTS

WASHINGTON AQUEDUCT, WASHINGTON, D.C.

W912DR-18-B-0002

DECEMBER 14, 2017

Question No. 1: This bid includes base bid and optional items. The scope of work, specifications and drawings are not totally clear with respect to the items that are to be carried in the base bid vs carried in the option.

Answer No. 1: Published in Amendment 0003. Refer to Revised Price Schedule and Sequence of

Work on Sheet C-02.

Question No. 2: Drawing C-02 has a listing of base bid and optional work. Is that the breakdown?

If so, this drawing indicates that interior structural repairs are part of the Option, however, the quantities shown on Drawing S-20 appear in the base bid. Please clarify.

Answer No. 2: Published in Amendment 0003. Refer to revised Sheet S-20, Concrete Repair

Schedule.

Question No. 3: Will there an organized site visit for this solicitation?

Answer No. 3: Published in Amendment 0001.

Question No. 4: Will there be a site visit or pre-bid?

Answer No. 4: Published in Amendment 0001.

Question No. 5: VAULT DOOR AND FRAME – This spec looks incomplete, as it simply lists different GSA style door types. Please provide the following for any vault door(s): Door class, type, style, and hinge location.

Answer No. 5: Disregard Section 08 34 59 Vault Door and Frame.

Question No. 6: Do you have the sizes of the pipes to be abandoned?

Answer No. 6: Published in Amendment 0003. Refer to revised Sheet M-01, Abandoned Pipe

Callouts.

Question No. 7: Where does note 5 apply?

Answer No. 7: Published in Amendment 3. The thimble is now addressed in Note 4 instead of

Note 5, which indicates that the thimble is to remain. Refer to revised notes on Sheet M-04.

Question No. 8: Where does note 6 apply?

Answer No. 8: Published in Amendment 3. Refer to revised Sheet M-06, Detail Section B, Note

8.

Question No. 9: Where does note 2 apply? I presume that it is required between stainless steel and carbon steel, but is it also required between the valve and the wall pipe?

Answer No. 9: Note 2 applies to all connections between dissimilar metals. Therefore, it does apply to the connection between the 78” butterfly valve and existing wall pipe.

Question No. 10: Is the type of concrete pipe known? If it has a steel cylinder, the drill-in anchors may not reach depth.

Answer No. 10: The type of construction of the existing 78” concrete pipe is not known. Since the pipe was constructed in early 1900, C 302 type pipe construction is expected, but not confirmed. The Contractor shall be prepared to install adhesive anchors in a concrete pipe containing a steel cylinder.

Question No. 11: No parameters have been provided for the baffle wall and different vendors may have very different ideas (and different prices), which WAD may not prefer.

Answer No. 11: Published in Amendment 0003. Refer to revised Sheet S-13, Note 5.

Question No. 12: The existing perimeter slab appears to terminate at the right side and does not extend to drawing S-05A. Is that correct? Also, the slope of the concrete is shown to be 1/8" per foot. However, detail 6 on S-10 appears to show a 24' transition from flat. Which is correct?

Answer No. 12: Published in Amendment 0003. Refer to revised Sheet S-05 & S-05A.

Question No. 13: Detail 3 states to extend the drill-in dowels 6" into the existing column, but detail 1 states that the dowels have 12" embedment. Which detail is correct?

Answer No. 13: Published in Amendment 0003. The drill in dowels shall penetrate through the joint between the concrete capital and column and the roof-sidewall joint by a minimum of 6 inches. Refer to revised Sheet S-10, Details 2, 3 and 4.

Question No. 14:

a. Confirm that all repairs will be done at a unit price and not lump sum as might be interpreted in note 2 on S-20.

b. S-20 item 4: Confirm the detail reference for waterproof injection grout.

c. S-20 detail 4: Confirm what is to remain. Confirm that this detail is intended to show work on top of the clearwell and not on the interior.

d. S-21 detail 3: Was it intended to show a copper cover over the 12” membrane?

e. Bid items 9 and 10 say the same thing.

f. Bid items 12 and 13: The unit is stated as LF. I think CF was intended.

g. Bid item 14: This quantity is not shown on Drawing S-20. Which detail was this work intended to be?

Answer No. 14:

a. Prices for bidding purposes use contractor's unit price multiplied by the provided estimated quantities. Payment will be by unit prices installed.

b. Published in Amendment 0003. Refer to Sheet S-20, Detail 1.

c. All work shown on sheet S-20 is inside the structure.

d. Published in Amendment 0003. Refer to Sheet S-20, Detail 3.

e. Published in Amendment 0003. Refer to revised Price Schedule. Units are in LF.

f. Published in Amendment 0003. Refer to revised Price Schedule. Units are in LF.

g. Published in Amendment 0003. Refer to Sheet S-20, Detail 2.

Question No. 15: How are the aluminum guardrails on the backwash platform to be connected to the posts? Are the rails to be welded to the post or is a non-weld railing component being used?

The spec does not seem to include rail/post connections. Detail #2 on M-02 shows the post connecting to the guardrails; however usually the guardrails are connected to the post, the post being one supporting piece. Please clarify how to connect rails to post.

Answer No. 15: The handrails (horizontal sections) are to be welded to the vertical guardrail support posts. The guardrail support posts are to be attached to the platform in accordance with

“Aluminum Handrail” detail shown on M-02. The handrails (horizontal sections) are to be attached to the adjacent wall in accordance with Detail 2- sheet M-02.

Question No. 16: Regarding valve replacement 6-37 on drawing M-06 do does not have electric drawing showing power and control diagrams. Please provide.

Answer No. 16: Published in Amendment 0003. Refer to revised Sheet M-06, Note 13.

Question No. 17: The revised price schedule provided in the addenda does not appear to line up with the concrete repair schedule found on sheet s20. Please reissue drawing s20 with a cross reference to the revised bid schedule to clarify which item goes to which bid item.

Answer No. 17: Published in Amendment 0003. Refer to revised Price Schedule and revised Sheet

S-20, Concrete Repair Schedule.

Question No. 18: What is the width of the 12” of stone required for the swale as shown on detail

9 of sheet C-09?

Answer No. 18: Published in Amendment 0003. The width of the 12" stone shall be seven (7) feet.

Refer to revised Sheet C-09, Detail 9/C-05.

Question No. 19: Is a wash rack required at the construction entrance?

Answer No. 19: Published in Amendment 0003. A wash rack is required at the construction entrance. Refer to revised Sheet C-05, Detail 13/C-09.

Question No. 20: Detail provided for stone check dam but not shown on the drawings, are any check dams required?

Answer No. 20: Published in Amendment 0003. "Stone check dam" Detail is not required and was removed. Refer to revised Sheet C-09.

Question No. 21: Is a hazmat materials survey available?

Answer No. 21: A hazmat survey is not available.

Question No. 22: Note 3 on sheet S-04 references note 6 on sheet S-06 but this note does not exist.

Please provide this note.

Answer No. 22: Published in Amendment 0003. The correct reference is "Note 4 on sheet S-05".

Refer to revised Sheets S-04 and S-04A, Note 3.

Question No. 23: Section 1 on sheet S-13 is referenced to sheet S-0. Please provide the sheet S-0 as referenced or provide clarification for the same.

Answer No. 23: Published in Amendment 0003. The correct reference is sheet S-05A. Refer to revised Sheets S-13 and S-05A.

Question No. 24: Sheet S-10; the outer and inner depth on column in section 2 have not been provided. Please provide new drawings illustrating the depth of the columns.

Answer No. 24: Published in Amendment 0003. Elevations have been provided. Refer to revised

Sheet S-10, Detail 2/S-05.

Question No. 25: Sheet S-10; depth on column in section 3, section 4 have not been provided.

Please provide new drawings illustrating the depth of the columns.

Answer No. 25: Published in Amendment 0003. Dimensions have been provided. Refer to revised

Sheet S-10, Details 3/S-10 and 4/S-05.

Question No. 26: Sheet S-12; depth on column in section B-B has not been provided. Please provide new drawings illustrating the depth of the columns.

Answer No. 26: Published in Amendment 0003. Dimensions have been provided. Refer to revised

Sheet S-12, Detail 5/S-12, Section B-B.

Question No. 27: Sheet S-13; depth on column in section 4 has not been provided. Please provide new drawings illustrating the depth of the columns.

Answer No. 27: Published in Amendment 0003. Elevations have been provided. Refer to revised

Sheet S-13, Detail 4/S-13.

Question No. 28: Contract drawing M-11 shows a chemical guide pipe support bracket which will be used to support the 2 ea. 3” SST guide pipes and 2 ea. 6” SST guide pipes. Detail 2 on the same drawing shows the section view of the bracket assembly. From the section view it is unclear if the intent is to furnish a support bracket for each guide pipe, or for two support brackets to support a steel plate which will have holes for all four guide pipes, as similarly shown as the existing steel floor plate on detail 1. Please clarify if one support bracket is to be provided for each guide pipe, or if only two are needed supporting a single steel plate.

Answer No. 28: The existing support brackets for the existing 3” and 6” stainless steel chemical guide pipes are to remain in use. New support brackets for the existing 3” and 6” stainless steel chemical guide pipes are not part of the work. Detail 2 on Drawing M-11 was provided in the event an existing chemical guide pipe support bracket needed to be replaced as a result of construction activities.

Question No. 29: Section view A on contract drawing M-11 shows the routing of the AQ AMM hose and CHL SOL hose through existing steel guide pipes. The drawing clearly notes that the steel guide pipes are existing, but it is unclear if the 1” flex hoses and 4” flex hoses to the butterfly valves are to be reused, or to be removed and replaced with new hoses. Please clarify.

Answer No. 29: Please refer to Section A on Drawing M-10, the existing two 1” AQ AMM flexible hoses and two 4” CHL SOL flexible hoses are to be removed and replaced with new flexible hoses. Refer to Specification Section 45 05 00-2.2 for information on the new flexible hoses.

Question No. 30:

a. Can you please clarify where the 750 LF of repair identified in bid item 0007 is shown on the repair chart on sheet S-20?

b. Per the schedule on S-20 we have to repair 1,000 LF of waterproof membrane patch, this quantity differs from bid item 008

c. The quantity for bid item 10 differs from the schedule on sheet S-20

d. Bid item 10 & 11 seem to have the same description, please explain the difference between the two

e. Bid item 014. Is this item in addition to the quantities shown on sheet S-20? Sheet S-8 indicates we are to repair all joints but this bid item states 4,000 LF, which is correct?

Answer No. 30:

a. Published in Amendment 0003. Refer to revised Price Schedule and revised Sheet S-20, Concrete Repair Schedule.

b. Published in Amendment 0003. Refer to revised Price Schedule and revised Sheet S-20, Concrete Repair Schedule.

c. Published in Amendment 0003. Refer to revised Price Schedule and revised Sheet S-20, Concrete Repair Schedule.

d. Published in Amendment 0003. Refer to revised Price Schedule and revised Sheet S-20, Concrete Repair Schedule.

e. Published in Amendment 0003. Refer to revised Price Schedule and revised Sheet S-20, Concrete Repair Schedule. See Sheet S-08, Note 3, which indicates for bid purposes, the estimated quantity for surface spall repair on Sheet S-20 shall be used.

Question No. 31: Is a Geotechnical report available?

Answer No. 31: A geotechnical report is not available.

Question No. 32: Sheet S-11; depth on column and elevation to determine the depth of dowels in section 1 has not been provided. Please correct and provide new drawings illustrating the depth of the columns.

Answer No. 32: Published in Amendment 0003. Dimensions have been provided. Refer to revised

Sheet S-11, Detail 1/S-05.

Question No. 33: Sheet S-04 note 3 indicates to refer note 6 from sheet S-06. Please correct or provides notes for sheet S-06 as there is only 1 note on S-06.

Answer No. 33: Published in Amendment 0003. The correct reference is "Note 4 on sheet S-05".

Refer to revised Sheets S-04 and S-04A, Note 3.

(End of Summary of Changes)