W912BU21B0015_SPECS-AM0001.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

- RFI questions and responses

- Changes in the Drawings

- Correction in the Spec Section to delete the first sentence of section 2.5.1.

- Please indicate receipt of this amendment on Standard Form 1442 (SOLI CI TATION, OFFER, AND AWAR D) as Amendment No. 0001. Failure to acknowledge all amendments may be cause for rejection of the bid.

1. CONTRACT ID CODE PAGE OF PAGES

1 2

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

16C. DATE SIGNED

BY

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 W912BU21B0015

X 9B. DATED (SEE ITEM 11)

23-Aug-2021

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.)

The purpose of this amendment is as follows:

***********************************THE BID OPENING DATE IS NOT EXTENDED*************************************

10A. MOD. OF CONTRACT/ORDER NO.

2. AMENDMENT/MODIFICATION NO.

5. PROJECT NO.(If applicable)

6. ISSUED BY

3. EFFECTIVE DATE

10 -Sep-2021

CODE

US ARMY ENGINEER DISTRICT, PHILADELPHIA

CONTRACTING DIVISION

WANAMAKER BUILDING

100 PENN SQUARE EAST

PHILADELPHIA PA 19107-3390

W912BU 7. ADMINISTERED BY (If other than item 6)

4. REQUISITION/PURCHASE REQ. NO.

CODE

See Item 6

FACILITY CODECODE

EMAIL:TEL:

W912BU21B0015

SECTION SF 30 BLOCK 14 CONTINUATION PAGE

SUMMARY OF CHANGES

(End of Summary of Changes)

Amendment No. 0001

IFB W912BU21B0015

14. DESCRIPTION OF AMENDMENT (continued)

a. REQUESTS FOR INFORMATION (RFI) WITH RESPONSES: RFI’s with responses, annotated Amendment No. 0001, are attached to this amendment.

b. TECHNICAL SPECIFICATIONS:

(1) Section 03 01 01 – MISCELLANEOUS CONCRETE REPAIRS: Please delete page 03 01 01-14 in its entirety and substitute revised page 03 01 01-14, attached hereto.

c. CONTRACT DRAWINGS: Please delete Sheet G-001 and Sheet G-100 in their entirety and substitute the revised drawings of the same numbers, with the latest revision date of 7 September 2021, attached hereto.

d. Please indicate receipt of this amendment on Standard Form 1442 (SOLICITATION, OFFER, AND AWARD) as Amendment No. 0001. Failure to acknowledge all amendments may be cause for rejection of the bid.

Polyester Polymer Concrete Deck Overlay William V. Roth, Jr. Bridge, St. Georges, Delaware

Requests for Information (RFI) RFI responses are provided in Bold

RFI 1:

I would like to attend the Bid Opening Conference Call. Please provide me with the call in number.

Response to RFI 1:

Call-in information will be provided the day of bid opening.

RFI 2:

Per 52.204-22 Alterative Line Item Proposal, I offer the following:

BI Description UM QTY___ Unit Price Extention 1 Mobilization LS 1 2 Temporary Traffic Control LS 1 3 Mill Existing LMC Overlay SY 25,694 4 Furnish PPC Overlay Material CY 6,620 5 Place PPC Overlay SY 25,694 6 Substrate Repair SY 5,790 7 Lane Striping LS 1 8 Approach Shoulders Asphalt SY 2,023 $___________ Replacement Total Base Bid Amount 9 Option 1 – Concrete SF 155 Spall Delamination Repairs Total Base Bid And All Options Amount These changes would Allow the Offeror to use the Mobilization Item to recover Fixed Costs under this bid item that are not related to Qty of work performed, Alternatively, These bid items would result in lower Unit Prices for remaining Bid Items.

Amendment No. 0001

Requests for Information Page 1

This would result in an equitable payment for work measured Qty of work performed under the contract.

The current Contract Bid Items would:

1. Be disadvantage to the Owner(Higher Costs)on Qty overruns(Fixed Costs don’t rise with Qty of work, But are spread over All Bid Items)

2. Be disadvantage to the Offeror on Qty underruns(Fixed Costs don’t change with Qty of work, But are spread over All Bid Items, Offeror can’t recover Fixed Costs) The New Bid Items proposed above, allow a fair exchange of funds based on the measured work performed under the contract to both Parties, the original Bid Items result in unfair treatment of one or the other party, unless the exact Bid Item Qtys are paid.

Please consider changing the Bid schedule.

Response to RFI 2:

Thank you for your input, but the bid schedule will remain as is. Please bid on line items presented in current bid schedule.

RFI 3:

The Contractor shall be required to (a) commence work under this contract within ten (10) days calendar days afterthe date the Contractor receives the notice to proceed.

What is the time frame between:

1. Bid Date and Award of Contract?

2. Award of Contract and Notice to Proceed?

Response to RFI 3:

There is no typical duration for contract award. If we have a responsible contractor to award to and their Pre-Award Equip list is approved award can be made to them pending Office of Counsel approval and if Congressional notice is received providing it is required. Once awarded the Contractor then has 10 days to provide bonds, once approved NTP can be issued.

RFI 4:

In the Construction Solicitation And Specifications, the following discrepancies are offered for your review and clarification:

1. Thickness of the Existing LMC Overlay on the Bridge Deck:

a. Page 3 of 75, Scope of Work, PP2, … The repair will consist of the removal of the existing 1.5"" LMC overlay that sits above the precast boxes.

b. Section 01 11 00 Page 1, 1.1.1.a, …. The work includes the removal of the existing 1-inch to 2-inch thick Latex Modified Concrete (LMC) overlay from above the precast boxes

Amendment No. 0001

Requests for Information Page 2

c. Section 01 11 00 Page 1, 1.1.1.b, …. For bidding purposes, the Contractor shall assume that the overlay has an overall average thickness of 2 inches.

If the Existing LMC Overlay was to average only 1.5”, would the Government expect a credit for the ½” difference in costs included in the price but not expended in the execution of the work? And conversely, if the LMC Overlay removed was an average of more than 2”, would the Government then be amenable to paying additional fund to reimburse the Contractor for the additional costs, due to the changed conditions?

Response to RFI 4:

The quantity for this unit priced item is an estimated quantity. Changes in estimated quantities are covered in contract clause "52.211-18 Variation in Estimated Quantity".

RFI 5:

Per Solicitation Plans & Specs, as well as Job Comments made by Government representative on the Job walk inspection on Mon., 8/30/21, 10 AM, There seems to be a high probability that the Qty, 3,620 CY in Bid Item #2, Mill Existing LMC Overlay and PPC Overlay Replacement, will underrun. Possibly, by 15 to 25 percent.

How will the contractor be compensated for fixed costs(Testing, Surveying, Field Offices, Supervision, etc.) and costs based on the footprint(SY Milling existing Overlay, Placing new PPC Overlay, etc.)?

Due to the provided Bid Item list, all of the costs that are either fixed(not related to the Qty of PPC material placed)or based on the footprint(SY)placed, must be spread over the CY Bid Item #2 Unit Price.

Will the Government please add Bid Items for Placement of PPC 25,694 SY, Removal of Existing LMC Overlay 25,694 SY, Longitudinal Grooving of Bridge Deck 25,694 SY and Mobilization 1 LS(to be paid per DelDOT Standard Specifications)?

Response to RFI 5:

The bid schedule will not be changed, any variations in quantity will be handled under the Variation in Estimated Quantity clause. Fixed costs should be spread proportionately to the appropriate bid item.

RFI 6:

Will the Government allow Polyester Concrete(PPC) for repair materials for Substrate Repairs on the bridge deck after the Existing LMC Overlay is removed, To substitute for the products called out in the Solicitation Specifications, Section 03 01 01, Amendment No. 0001

Requests for Information Page 3

Part 2, Products?

This would alleviate the issue of using different materials for deck patching, much simpler & probably result in lower Bid prices.

Response to RFI 6:

No, use the materials as specified in the contract for repair to the substrate.

RFI 7:

Note: For repairs to top of box girder below the overlay (substrate repairs) … For any defect that is less than 1/2-inch deep, the void shall be filled with the concrete overlay material.

I s the material placed for Substrate Repairs to be pad for as Bid Item #2 PPC Overlay or Bid Item #3 Substrate Repair or both??

Response to RFI 7:

Refer to note 2 on drawing S-101 and paragraph 3.6.1 of section 03 01 01.

For defects less than 1/2" in depth filled in with the overlay material, it will be covered under bid item #2, Mill existing LMC overlay and PPC Overlay placement. Item #3, Substrate repairs is anything below the overlay material, which would be repairs using epoxy grout or rapid hardening Portland cement mix.

RFI 8:

Per POLYESTER POLYMER CONCRETE OVERLAY, Section 32 12 36 1.8 ENVIRONMENTAL REQUIREMENTS Page 7,

b. Do not place polymer-modified repair materials when the air temperature is below 40 degrees F or above 100 degrees F.

c. Do not place HMWM primer in joints or cracks when the temperature is below 40 degrees F.

And h. Follow manufacturer's instructions for weather conditions and temperature ranges.

Month Ave High Ave Low St Georges, DE Nov 55F 36F per NOAA Dec 44F 27F Jan 40F 23F Feb 43F 25F Mar 52F 32F Apr 64F 41F The average Temps in Dec, Jan, & Feb preclude the Contractor from doing ANY PPC Overlay work.

The Average Temps in March are marginal.

The Deck work is Critical Path work on this job. I’m sure that COE & DelDot don’t want us to set up Temporary Barrier in November, Mill Existing Overlay, Phase 1 and be unable to place PPC Overlay until March

Amendment No. 0001

Requests for Information Page 4 or April, Leaving the narrowed lanes through the cold winter.

Would the Government consider issuing an addendum to state that the NTP will not be issued until March 1st, 2022?

The Contractor could work on Submittals, etc. between the Award and NTP.

This only seems reasonable.

Response to RFI 8:

NTP is required to be issued prior to any work being performed on the contract, this including submittals. NTP will be issued pending the receipt of the contractor’s bonds. It is understood that if the NTP is issued in October, certain preconstruction submittals such as work plans and temporary traffic control plans will be required to be submitted and approved before any physical work is allowed to be performed.

Amendment No. 0001

Requests for Information Page 5

Finished Time 30 minutes Color Gray

Properties of the Cured Material Compressive Strength (ASTM C39/C39M Modified)

1 day 2,000 psi minimum 7 day 5,500 psi minimum 28 day 6,500 psi minimum

Bond Strength (ASTM C882/C882M modified) @ 28 days 2,500 psi minimum

Flexural Strength (ASTM C78/C78M) @ 28 days 1,000 psi minimum

Tensile Strength (ASTM C496/C496M) @ 28 days 1,000 psi minimum

Shrinkage (ASTM C157/C157M) <0.05 percent

Chloride Ion Permeability (ASTM C1202) <650 Coloumbs

2.4.2 Rapid Hardening Concrete Repair Material

The repair material used for the top of boxes shall be a one component, portland cement concrete containing a factory blended coarse aggregate that is rapid setting and has a cure time of 2 hours. The concrete repair material shall be a blend of portland cements that are polymer-modified, specially graded aggregates and silica fume, supplied as a factory blended unit. The material shall also contain a migrating corrosion inhibitor.

Properties of the Mixed Material Set Time (ASTM C266) 40 - 50 minutes Finish Time (ASTM C266) 50 - 60 minutes Color Gray

Properties of the Cured MaterialCompressive Strength (ASTM C39/C39M Modified)

2 hour 2,500 psi 3 hour 3,000 psi 1 day 5,000 psi minimum 7 day 6,000 psi minimum 28 day 7,500 psi minimum

Bond Strength (ASTM C882/C882M modified) 28 days 2,500 psi minimum

Flexural Strength (ASTM C293/C293M) 28 days 700 psi minimum

Splitting Tensile Strength (ASTM C496/C496M) 1 day 400 psi minimum

Shrinkage (ASTM C157/C157M) <0.06 percent

Chloride Ion Permeability (ASTM C1202) @ 28 days <1,500 Coloumbs

Section 03 01 01 Page 13

Amendment No. 0001

2.4.3 Bonding Agent

The bonding agent shall be an asbestos free, three component, epoxy resin/portland cement adhesive, proven to prevent corrosion of reinforcing steel. The epoxy bonding compound shall conform to AASHTO M 235M/M 235.

Component A shall be an epoxy resin/water emulsion containing suitable viscosity control agents and shall not contain butyl glycidyl ether.

Component B shall be a water solution of a polyamine.

Component C shall be a blend of selected portland cements and sands.

2.4.3.1 Properties of the Mixed Material

Pot Life 90 min @ 73 deg F Contact Time 12 Hr @ 68 deg F Color Grey

2.4.3.2 Properties of the Cured Material

Bond Strength (ASTM C882/C882M) @ 14 days Wet on Wet, 0 hr. open time 2,800 psi 24 hr open time 2,600 psi

Compressive Strength (ASTM C109/C109M Modified) 1 day 4,500 psi min 7 day 6,500 psi min 28 day 8,500 psi min

Flexural Strength (ASTM C348) 1,250 psi min

Splitting Tensile Strength (ASTM C496/C496M) 28 day 600 psi min

2.5 MISCELLANEOUS MATERIALS AND EQUIPMENT

2.5.1 Epoxy Grout

Sentence deleted.

Provide rapid strength gain epoxy grout systems that are 100 percent solids, containing thermosetting epoxy resin, expansive additives, and fine aggregate, and match or exceed the test values below:

Compressive Strength (ASTM C579, Method B) 2 days 8,000 psi min 28 days 12,000 psi min

Tensile Strength (ASM C307) 7 days 2,000 psi

Bond Strength (ASTM C882) 7 days 3,500 psi

2.5.2 Surface Applied, Corrosion Inhibiting (SACI) Impregnation Coating

Provide a Surface Applied Corrosion Inhibitor (SACI) coating on concrete and other acceptable surfaces in order to reduce the effects of corrosion.

Apply SACI coating over all miscellaneous spall repairs. This shall not be

Section 03 01 01 Page 14