Amendment 0003.pdf

NAVFAC

SPECIFICATION

6900670

REPAIR & IMPROVE

INDUSTRIAL WASTEWATER

TREATMENT PLANT

MCAS Cherry Point, NC

AMENDMENT #0003

IMPORTANT

This amendment should be acknowledged when your proposal is submitted. Failure to acknowledge the amendment may constitute grounds for rejection of the proposal.

If your proposal has been submitted prior to the receipt of this amendment, acknowledgement should be made by telegram, which should state whether the price contained in your proposal is to remain unchanged, is to be decreased by an amount, or is to be increased by an amount. The acknowledgement must be received prior to proposal opening time.

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT 1. CONTRACT ID CODE PAGE OF PAGES

1 24

2. AMENDMENT/MODIFICATION NO. 3. EFFECTIVE DATE 4. REQUISITION/PURCHASE REQ. NO. 5. PROJECT NO. (If applicable)

0003 05/27/2020 6900670

6. ISSUED BY Code N40085 7. ADMINISTERED BY (If other than item 6.) Code

CG MCAS Cherry Point

FACILITIES, ROICC

B-163, CURTIS ROAD

PSC BOX 8006

CHERRY POINT, NC 28533

8. NAME AND ADDRESS OF CONTRACTOR (No., street, county, State and ZIP Code) 9A. AMENDMENT OF SOLICITATION

REPAIR & IMPROVE INDUSTRIAL

WASTEWATER TREATMENT PLANT

9B. DATED (SEE ITEM 11)

AMENDMENT MUST BE ACKNOWLEDGED WITH YOUR PROPOSAL 10A. MODIFICATION OF CONTRACT/ORDER NO.

10B. DATED (SEE ITEM 13)

CODE FACILITY CODE

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

The above numbered solicitation is amended as set forth in item 14. The hour and date specified for receipt of Offers is extended is not extended. Offers 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 copy 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 ADMINISTRATION 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 original to the issuing office.

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

6900670 Repair & Improve Industrial Wastewater Treatment Plant, Marine Corps Air Station Cherry Point, NC

This amendment is being issued to answer RFIs received and incorporate updated specification sections and drawings. Revised specifications and revised drawings have been uploaded to beta.sam.gov.

The deadline to submit pre-award RFIs has passed.

The proposal due date of 10 June 2020 at 1200 local time REMAINS unchanged.

15A. NAME AND TITLE OF SIGNER (Type or print) 16A. NAME AND TITLE OF CONTRACTING OFFICER (Type or print)

15B. CONTRACTOR/OFFEROR (Same as Item 8) 15C. DATE SIGNED 16B. UNITED STATES OF AMERICA 16C. DATE SIGNED

BY

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

NSN 7540-01-152-8070 30-105 STANDARD FORM 30 (REV.1-83) 0224-3(10-90)

PREVIOUS EDITION UNUSABLE Prescribed by GSA

CONTINUATION SHEET

SPECIFICATIONS

The following specifications are revised as noted as of May 21, 2020, as indicated in each revised specification footer, and accompany this amendment:

SECTION 00 01 15, 1.3.1, Row 3, Column 1 of the table has been revised from “4050894-4050944” to “4050894-4050905; 4050942-4050944”.

SECTION 01 14 00, 1.2.2, has been revised to add clarification to provide uninterrupted operation of sampler.

SECTION 01 14 00, 1.2.6, has been revised to clarify new alum injection location on bypass to be operational prior to taking CTF offline.

SECTION 01 14 00, 1.2.7, has been revised to clarify totes and sulfuric acid to be provided by the Government.

SECTION 22 13 29, 2.2.1 and 2.3.1, has been revised to remove reference to “grinder”.

SECTION 40 95 00, 3.2.3.2 and 3.2.22.2, has been revised to remove

“WWTP” and replace with “IWTP”.

SECTION 43 11 00, 2.8 “Noise Minimization” has been removed.

SECTION 43 41 16.16 40, 2.2, CTF Treatment Tanks requirements have been revised.

SECTION 46 30 00, 2.3, revised to 24 new chemical diaphragm pumps.

SECTION 46 43 21, 2.5.9, weir plate material revised to 304 stainless steel.

CONTRACT DRAWINGS

The following drawings are revised as of May 21, 2020 and accompany this Amendment:

NAVFAC

NO.

SHEET TITLE

12798697 G002 GENERAL NOTES

12798706 CD010 DEMOLITION PLAN – SITE

12798721 CD301 DEMOLITION PLAN – CONTINUOUS TREATMENT FACILITY

12798741 CS010 SITE LAYOUT PLAN

12798750 CU100 GRIT SYSTEM REPLACEMENT PLAN

12798751 CU101 GRIT SYSTEM REPLACEMENT SECTION & DETAILS

12798754 CU104 PRIMARY EFFLUENT PUMP STATION MODIFICATIONS

12798757 CU300 CTF IMPROVEMENTS PLAN

12798758 CU301 CTF IMPROVEMENTS PLAN & SECTIONS

12798763 CU500 MODIFICATIONS TO EXISTING POLYMER FEED BUILDING

12798764 CU600 EFFLUENT STRUCTURE PLAN, SECTIONS, & DETAILS

12798765 CU601 OIL-WATER SEPARATOR PLAN & DETAILS

12798766 CU700 SCUM-SLUDGE STORAGE FACILITY PLAN

12798767 CU701 SCUM-SLUDGE STORAGE FACILITY SECTIONS & DETAILS

12798784 SU101 SECTIONS

12798787 SU104 PRIMARY CLARIFIER EFFLUENT PUMP STATION STRUCTURAL

12798792 SU400 UPFLOW CLARIFIER STRUCTURAL PLAN

12798794 SU500 EXISTING POLYMER BUILDING STRUCTURAL MODIFICATIONS

12798797 SU700 SLUDGE/SCUM TANK FOUNDATION PLAN AND CATWALK FRAMING

PLAN

12798799 SU800 SLUDGE DEWATERING BUILDING STRUCTURAL IMPROVEMENTS

12798809 I200 EQUALIZATION & CTF

12798812 I400 SLUDGE PROCESSING

12798813 I500 CHEMICAL STORAGE

12798820 E007 ELECTRICAL – GENERAL OVERALL SINGLE LINE DIAGRAM

12798824 E103 ELECTRICAL – CONTROL BUILDING [B1005] SWBD-IWTP

SINGLE LINE DIAGRAM & ELEVATION

12798827 E106 ELECTRICAL – CONTROL BUILDING [B1005] RISER DIAGRAMS

& PANEL SCHEDULES

12798833 E112 ELECTRICAL – CONTROL BUILDING [B1005] CONDUIT & WIRE

SCHEDULES

12798835 E150 GRIT SYSTEM PLAN

12798852 E501 ELECTRICAL – POLYMER FEED BUILDING [B4382] POWER PLAN

12798854 E503 ELECTRICAL – POLYMER FEED BUILDING [B4382] RISER

DIAGRAMS & PANEL SCHEDULES

Amendment 0003 6900670 - REPAIR & IMPROVE INDUSTRIAL

WASTEWATER TREATMENT PLANT

RFI Responses:

4. On the CTF Plan, pages CU300-CU303, is the 4” bypass pipe to be ductile iron pipe? (CU300)

Response: Refer to revised drawing 12798757 (CU300), dated 05/21/2020.

5. On the 10” reinstall existing piping and appurtenances, do that include any of the 8” items?

(CU300)

6. On the 4” siphon drain headers, there are PVC ball valves. Is the rest of the material ductile iron?

(CU303 section 5)

Response: Refer to revised drawing 12798757 (CU300), dated 05/21/2020.

7. On page CU500 section 1, it is showing a 3” floor drain and 90 into 4” SCH80 pipe. I would like to verify that it is 3” pipe.

Response: Refer to revised drawing 12798763 (CU500), dated 05/21/2020.

8. Can the government please confirm that the only required deliverables are electronic bid bonds

(as stated on Page 2 of the RFP) and a completed Proposal Form (Page 9 of the RFP)?

Response: See page 2 and 9 of the RFP

9. Specification 00 01 15, paragraph 1.3.1 Reference Drawings identifies 3 sets of reference drawings that were not included in the original solicitation. Reference drawings include NAVFAC numbers: 4236900-4237427 UPGRADE WASTEWATER TREATMENT PLANTS, CHERRY POINT, NORTH CAROLINA, BY DAVIS & FLOYD, INC., DATED 11/01/1991, 4050894-4050944 INDUSTRIAL WASTE COLLECTION AND TREATMENT FACILITIES, MARINE CORPS AIR STATION, CHERRY POINT, NORTH CAROLINA, BY MOORE, GARDNER & ASSOCIATES, INC., DATED 01/21/1983, and

12714529-12714535 PROJECT #6392771 VPP -INSTALL FALL PROTECTION FOR CTF TANKS AT

IWTP BUILDING 4380. Please provide for bidders. In addition, we respectfully request a 15-day extension to the bid due date to allow sufficient time for bidders to review the approximate 530 record drawings referenced throughout the solicitation.

Response: These drawings will accompany this amendment. The proposal due date has been extended until June 10th.

10. Reference drawing CD500. During the site visit 30APR2020 it was identified that the defoam tank noted as REMOVE & SALVAGE DEFOAM TANK AND ALL APPURTENANCES FOR RELOCATION

WITHIN THE POLYMER BUILDING has previously been removed. Please clarify if the defoam tank is still in use within the plant processes.

Response: Submit Proposals in accordance with RFP, Specifications, Drawings, and all Amendments.

11. Reference specification 40 95 00, paragraph 3.2.3.2 and paragraph 3.2.22.2 SCADA Automated Controls refers to remote monitor influent flow rates at the WWTP. Please confirm this was in error and should read IWTP.

Response: Refer to revised specification 40 95 00, dated 05/21/2020.

12. Reference specification 43 41 16.16 40 Vertical Atmospheric Tanks & Vessels. Paragraph 2.2 describes the continuous treatment tanks as 6’ I.D. x 8’ high, capacities of 1,500 gallons, and for the tanks to be supported by four structural steel legs with adequate stiffening. Drawing CU301 has the new continuous treatment tanks detailed to match the existing tanks shown on CD302 which are show as a 7’-6” wide x 12’ -6” high tank, capacity of ~4,000 gallons, and for the new tank to sit directly on the existing concrete equipment pads the existing tanks sit on. The specifications and the drawings contradict. Please clarify which is to be followed. If the same size tanks existing are not replaced with identical size tanks the existing stair, platform, and guardrail may not be reusable as the drawings note to reuse.

Response: Refer to revised specification 43 41 16.16 40, dated 05/21/2020.

13. CD010 at the headworks area notes to DEMOLISH CONCRETE PAD. SALVAGE SAMPLING UNIT.

Does the sampling unit need to be relocated to stay in service while the new spill containment sump area and pad are being constructed?

Response: Refer to revised drawing 12798706 (CD010), dated 05/21/2020.

14. The 01 14 00 specifications do not identify any work restrictions for the demolition/replacement of the grit removal equipment and dewatering screw. Please confirm the two slide gates can be secured to block flow into the grit removal structure and identify if there are any time constraints or other plant processes that cannot be offline or must be completed prior to performing the demolition/replacement of the grit removal equipment and grit dewatering screw during the performance of the contact.

15. Please consider the influent water line level just after flow leaves existing manhole #1 shown on

CU100. The invert elevation of the two new 6” ductile iron pipes being core drilled into the influent structure on CU101 appear to be near the bottom of the influent structure that is shown as elevation 12.60 on CU100. Please confirm chemical feeds from the totes will still flow properly as required into the influent chamber if the new 6” pipes are constantly filled with influent water from being below the influent flow water line level.

16. Please confirm flows out of existing manhole #1 shown on CU100 can be stopped to allow core drilling of the influent chamber bottom for new pipe inverts from the new spill containment sump.

17. At the influent structure, influent of the 6” parshall flume, the existing top of walls appear to be approximately elevation 16.00. CU101 & SU101 both show the new slab on grade, plan west, to be flush with the top of the adjacent influent structure walls. Note that the top of the wall at the influent structure slopes down ~10” just past the parshall flume effluent. Please specify if the

15.2 +/- elevation shown on CG010 is the top of the containment sump grating or the top of the 6” concrete pad surrounding the containment sump. It’s recommended that the finish SOG around the new containment sump matches the top of the wall just past the parshall flume so that the slab is flush with the top of the wall at plan east so that toe plates would not need to be added at existing guard rails and the existing gate valve bonnet & floor stand would not need to be adjusted.

Response: Refer to revised drawings 12798751 (CU101) and 12798784 (SU101), dated 05/21/2020.

18. On drawing CU101, section 1 please confirm the spill containment sump 3” drain line invert and bottom elevation of the sump has been coordinated in the design to be above the influent flow water level line.

19. What chemicals are used at the headworks 330-gallon feed totes? Please confirm they are not corrosive to ductile iron pipe. It is advisable to install 6” PVC piping in lieu of ductile iron. Can 6” PVC be used in lieu of ductile iron?

Response: Refer to revised drawing 12798751 (CU101), dated 05/21/2020.

20. Note #21 on drawing G002 says, ALL PRESSURE PIPES SHALL BE FULLY RESTRAINED, UNLESS

OTHERWISE NOTED ON THE DRAWINGS. On CU101 pipe bends for the 6” ductile iron gravity chemical feed piping is shown to have restrained fittings. For this pipe application restrained fittings are an unnecessary cost to the government. Please confirm restrained joints at this gravity piping is not required.

21. On drawing SU101 please provide a dimension that the top of the sump wall is to be above the surrounding 6” slab on grade.

Response: Refer to revised drawings 12798751 (CU101) and 12798784 (SU101), dated 05/21/2020.

22. On drawing SU101 at sections B1 & B2 please specify the stone thickness required below the 8” slab on grade at the grit system.

Response: Refer to revised drawing 12798784 (SU101), dated 05/21/2020.

23. The cross-bracing/grit support steel that is noted on CD100 for demolition is illustrated on CU101 as if to remain to accept new equipment. Please confirm if the grit support steel is to remain to accept the new girt removal equipment or new support steel is required.

24. Note #1 on CU101 says CONTRACTOR SHALL INSTALL WATERTIGHT SEALS (TYP. ALL PIPE

PENETRATIONS). Please confirm where pipes penetrate slabs on grade that watertight seals are not necessary and a protective barrier between the pipe penetration and the concrete is acceptable.

25. Reference drawing CG010. Please provide a section detail for the concrete sloping up from the asphalt road elevation 13.35 & 13.30 up to the grit system canopy pad at elevation 13.50. Is this concrete to be 4”, 6” or 8” thick?

Response: Refer to revised drawing 12798741 (CS010), dated 05/21/2020

26. Please confirm that anchor bolts shown in section B2 on sheet SU101 for the grit system canopy can be drilled and epoxied in lieu of wet setting.

Response: Submit Proposals in accordance with RFP, Specifications, Drawings, and all Amendments.

27. Note #21 on drawing G002 says, ALL PRESSURE PIPES SHALL BE FULLY RESTRAINED, UNLESS

OTHERWISE NOTED ON THE DRAWINGS. On drawing CU100 & CU101 only the 4” grit suction piping below grade is identified as having restrained joints. Above ground pressure piping is not indicated to be restrained except for the dismantling joint connections at the grit dewatering screw. Please clarify if the above ground pipe joints on CU100 & CU101 that are not identified as restrained are not required to be fully restrained joints.

28. Drawing CU100 plan view of piping from the 10”X6”X6” tee to the influent structure is shown as

10” with a 10” 90 oriented down into the influent channel. On drawing CU101, section 2 next to the 3” drain line the bend is shown as (2) 6” 90 bends. Please clarify what size the bends shown on CU101 are supposed to be 6” or 10”?

29. Drawing SU101 indicates 26 GA ribbed metal roof panels over metal decking. Drawing AU100 indicates 24 GA metal roof panels attached directly to steel deck. Please coordinate which GA. is correct.

Response: Refer to revised drawing 12798784 (SU101), dated 05/21/2020.

30. Drawing AU100 shows metal roof panels attached directly to steel decking at the grit system canopy roof. Drawing AU800 shows metal roof panels over underlayment and ¼” sheathing over steel decking at bldg. 3987. Confirm design was intended to be panels attached directly to metal decking at grit canopy (not underlayment or sheathing) and panels over an underlayment and sheathing on metal decking at building 3987.

31. Please indicate the desired location of the control panel equipment rack with sunshield for the grit removal system on drawing CS010. Drawing E150 shows the rack & pad below within the asphalt road.

Response: Refer to revised drawing E150, dated 05/21/2020

32. On drawing SU102 AND SU200 the tables indicating vertical and horizontal quantities for spall repairs is given in CF (cubic feet). Please confirm these quantities are supposed to be SF (square feet).

33. On drawing CU103, at the influent channels, the note says to apply immersion high performance coating to 1’ below WS. The bold line indicates coatings full height of the walls and including the channel bottoms. Please clarify the elevation of the water level in the effluent channels or revise the note to clarify the extents of the surfaces to receive coatings.

34. At the dry well please confirm it is acceptable to leave the existing concrete pump pads in place and install the well-compacted structural fill overtop after all other piping and appurtenances are removed.

35. At the auxiliary emergency pump CD010 demolition note #1 says to remove pipe to minimum 1’ below grade and provide concrete plug. Drawing CU104 shows to install a blind flange on the vertical flange of the above grade 90 bend. Please clarify which note is to be followed.

Response: Refer to revised drawing 12798754 (CU104), dated 05/21/2020.

36. Please provide a specification for the 1 ton monorail chain hoist.

Response: Submit Proposals in accordance with RFP, Specifications, Drawings, and all Amendments.

37. On drawing SU104 at detail A5 please provide notes on typical baseplate detail to indicate attachment method and embed depth into existing top of wall.

Response: Refer to revised drawing 12798787 (SU104), dated 05/21/2020.

38. Is it acceptable to drill and epoxy anchor bolts into the new pier detail on SU104 in lieu of wet setting method?

39. During the site visit the 6” piping below the elevated scum box on drawing CD401 & CU401 was severely deteriorated but is not shown for removal/replacement. It is advisable to have the 90 bend and vertical pipe below the scum box replaced during the scum box replacement and the remaining 6” D.I.P. be cleaned and new immersion high performance coating applied to the new vertical pipe, new 90 bend, and existing horizontal pipe within the tank. Please clarify on the drawings if this is desired.

40. Drawings CD401 & CU401 do not indicate the baffle plates in front to the weir plates. Confirm existing baffle plates are to be demolished and new baffle plates provided/installed at each of the four upflow clarifiers. Please provide details for new baffle plates.

41. Drawing CU401 Weir Plate Detail indicates the weir plate for the upflow clarifiers to be 304

Stainless Steel. Specification 46 43 21, 2.5.9, calls for FRP weir plates and baffles. Which is the correct material for fabrication?

Response: Refer to revised specification 46 43 21, dated 05/21/2020.

42. Drawing SU400 plan note #7 says FOR CONCRETE REPAIR DETAILS, REFER TO DETAILS ON SHEET

SU900. However, no concrete repair callouts are shown on the upflow clarifier plans. Please confirm no concrete repairs required or provide table for bidding purposes of surface repair quantities required at upflow clarifiers concrete surfaces.

Response: Refer to revised drawing 12798792 (SU400), dated 05/21/2020.

43. Drawing SU400 indicates that loose rust and scale is to be removed from existing steel guardrail and for zinc rich primer and epoxy topcoat to be applied. There is no mention of cleaning the existing equipment bridge channels. Confirm the equipment bridge is not to be cleaned & repainted.

44. Drawing SU500 plan note #4 says FOR CONCRETE REPAIR DETAILS, REFER TO DETAILS ON SHEET

SU900. However, no concrete repair callouts are shown on the polymer building plans. Please confirm no concrete repairs required or provide table for bidding purposes of surface repair quantities required at polymer building concrete surfaces.

Response: Refer to revised drawing 12798794 (SU500), dated 05/21/2020.

45. Drawing AU500 calls out at the new opening door jambs to PROVIDE GALVANIZED STEEL ANGLE AT MASONRY OPENING. SEE STRUCTURAL. Steel angle is not identified on SU500 drawing.

Please specify angle size and attachment requirements.

46. On drawing SU500 please provide a length or bearing at each end that is required for the new 8” wide x 16” deep precast concrete lintel.

Response: Refer to revised drawing 12798794 (SU500), dated 05/21/2020.

47. Specification 01 14 00 paragraph 1.3.7 Bulk Chemical Storage says that while the continuous treatment facility is out of service, the sulfuric acid tank shall be removed, and 30% sulfuric acid shall be fed from storage totes (approximately 350 gallons). Please confirm if the totes and sulfuric acid is provided by the government and only temporary piping for connection of the totes to the existing batch system feed pumps is by the contractor.

Response: Refer to revised specification 01 14 00, dated 05/21/2020.

48. Drawing CD300 & CU300 show BT-1A oriented towards the top of the page. Drawing CD301 &

CU302 shows BT-1A oriented towards the bottom of the page. Please clarify if the order of the batch tanks is supposed to be oriented A through C from top of page to bottom or from bottom of page to top.

49. The contract documents do not illustrate any work restrictions to which the chemical feed pumps can be removed in the Continuous Treatment Facility (CTF). For example, specification 01 14 00 paragraph 1.2.6 Continuous Treatment Facility says, prior to taking the continuous facility offline the new pH meters shall be installed in the equalization basins, new pH paced caustic pumps and related feed piping for automatic pH adjustment in the equalization basin, and the new CTF bypass line with new magnetic flow meter and rate-of-flow control valve must all be installed and be operational. Four (4) existing chemical feed pumps P-33, P-34, P-35, & P-36 provide aluminum sulfate to the existing four (4) upflow clarifiers CLAR. #3, CLAR. #4, CLAR. #1, & CLAR. #2 respectively. The last sentence in paragraph 1.2.9 of specification 01 14 00 says three (3) upflow clarifiers shall remain in service at all times. Drawing CU302 shows new pumps P-34 & P35 as aluminum sulfate chemical feed to a new chemical injection point on CU300 just downstream of where the 4” bypass pipe ties into the existing 10” CTF effluent line. Please specify at what point during the performance of the work the chemical injection point shown on CU300 is required to be operational. If required prior to taking the CTF offline CLAR. #4 & CLAR.

#1 would be without aluminum sulfate.

Response: See the revised spec section 01 14 00 dated 5/21/2020.

50. The contract documents do not illustrate any work restrictions to which the chemical feed pumps can be removed in the Continuous Treatment Facility. For example, paragraph 1.2.6 Continuous Treatment Facility of specification 01 14 00 says, prior to taking the continuous facility offline the new pH meters shall be installed in the equalization basins, new pH paced caustic pumps and related feed piping for automatic pH adjustment in the equalization basin, and the new CTF bypass line with new magnetic flow meter and rate-of-flow control valve must all be installed and be operational. The existing chemical feed pumps P-26 & P-27 currently provide magnesium hydroxide to existing continuous treatment tanks T-11 & T-11A. New pumps P-38 & P-40 provide chemical treatment to the equalization basins and are to be placed on existing pads where P-26 & P-27 are currently existing. Please confirm that existing treatment processes are attainable without magnesium hydroxide to T-11 & T-11A.

51. The contract documents do not clearly illustrate work restrictions to which the chemical feed pumps can be removed in the Continuous Treatment Facility. For example, the last two sentences in paragraph 1.2.6 Continuous Treatment Facility of specification 01 14 00 says, Once the continuous treatment facility is taken out of service, the Contractor will have 60 days to complete all work in this building and have it back in service. During this time, the Government will treat all contaminated wastewaters via the batch treatment process. The upflow clarifiers shall remain in continuous operation and treat all wastewater being discharged from this facility.

Is the intent to treat all wastewater through a combination of treatment at the equalization basins with new sodium hydroxide chemical feeds and at the upflow clarifiers with the existing aluminum sulfate chemical feed pumps during the 60 days?

52. Specification 01 14 00 Paragraph 1.2.7 Bulk Chemical Storage says, Continuous sulfuric acid addition must be available to the batch treatment system while the continuous treatment facility is out of service. On drawing CD301 batch tank BT-1A operates off pumps P-15B (sulfuric acid) & P-25 (sodium hydroxide). Batch tank BT-1B operates off pumps P-8 (sodium hypochlorite), P-15A (sulfuric acid), & P-24 (sodium hydroxide). Batch tank BT-1C operates off existing pumps P-11 (sodium metabisulfite) & P-15 (sulfuric acid). The new chemical feed piping configuration on drawing CU302 is shown to be the same as was existing except for BT-1C is only to have a sodium metabisulfite chemical feed and no sulfuric acid. Is temporary sulfuric acid via the storage totes to the batch tanks only required to BT-1A & BT-1B while the CTF is offline for 60 days?

53. Is the sodium hypochlorite pump P-8 to batch tank BT-1B required to be kept in operation during the 60 days the CTF is offline or can all three (3) sodium hypochlorite pumps all be replaced at one time during the 60 day CTF replacement work?

54. Is the sodium metabisulfite pump P-11 to batch tank BT-1C required to be kept in operation during the 60 days the CTF is offline or can all three (3) sodium metabisulfite pumps all be replaced at one time during the 60-day CTF replacement work?

55. Are the sodium hydroxide pumps P-24 & P-25 to batch tanks BT-1B & BT-1C required to be kept in operation during the 60 days the CTF is offline given that the new sodium hydroxide feeds to the equalization basins and new pH meters are required to be in place at the equalization basins before the CTF is taken offline? Therefore, allowing the remaining six (6) sodium hydroxide pumps to be replaced at once.

56. Drawing CU201 shows existing Equalization Tk #1 with a pH probe and submersible pressure transducer, is this existing or do we need to supply? The PIDs do not show EQ Tank #1 as needing either.

57. Drawing CU601 shows a 0-60 psi gauge but no tag number; are we to supply this device?

Response: Submit Proposals in accordance with RFP, Specifications, Drawings, and all Amendments.

58. Drawing CU801 shows a 0-120 psi gauge but no tag number; are we to supply this device?

59. Drawing CU803 shows a 0-120 psi and a 0-200 psi gauge but no tag numbers; are we to supply this device?

Response: Submit Proposals in accordance with RFP, Specifications, Drawings, and all Amendments.

60. Drawing CU101 shows a pressure indicator with a range of 0-20 psi, is there a tag number for this unit? Who is supplying it?

61. Reference specification 22 13 29, paragraph 2.2.1 Pump Characteristics. In the design data chart for the pump-s at the Influent (Wet Well) Pump Station and the Oil / Water Separator Pump Station, there are two points that need clarification: 1. The pumps are listed as submersible grinder pumps. Are grinder pumps required for Industrial Waste, since there should not be any organic material in the waste stream? Would a submersible effluent pump be a better choice?

Response: Refer to revised section 22 13 29, dated 05/21/2020.

62. Reference specification 22 13 29, paragraph 2.2.1 Pump Characteristics. In the data chart, the depth of submergence for the pumps is listed as 2 feet for pumps at the influent pump station and oil/water separator pump station. On Drawing CU104, Pump Station Information detail, the low water alarm setting is 2.5 feet off the bottom of the wet well, and the high alarm depth is

8.0 feet. On drawing CU601, the Oil / Water Separator Pump Station Information detail lists the pump low water level alarm at 10.5 and the high-water alarm level as elev. 15.5. Please confirm the submergence depth ratings for the pumps.

63. Reference plan view on CD200, the influent piping for pumps P-53, P-54, and P-55 are labelled as 6” DIP. Section A of this sheet illustrates the gate valves to be demolished labeled as 4” gate valves. In the plan view on Drawing CU200, Equalization Basin Plan, the pump suction piping is labelled as 6” DIP and there is a call-out for motor actuated 6” gate valves, stems, and bonnets (typical of 2). In the elevation view on Drawing CU201, Section1 the valve for one basin is called out “Motor actuated 6” gate valves, stems, and bonnets (typ. of 2), but the valve for the other tank is labelled 4” gate valve. What is the correct size for the valves and DI piping?

64. This project involves extensive bid coordination between divisions of work throughout various industrial waste treatment processes spread across the plant. Our trade partners are working hard to generate competitive pricing but have required considerable time just in absorbing the drawings, specifications, plant processes, and work restrictions therein to develop questions.

The project was solicited Monday 27APR with a site walk scheduled just 3 days later Thursday 30APR. Vendors and trade partners were into documents heavily the follow Monday 04MAY but again took many days to comprehend all the different process pieces involved in the project to develop their questions. In consideration of a suitable response time for the government of RFI’s, review time for responses, and acknowledging the Memorial Day weekend with the bid due just one day after the holiday; we respectfully request a 14-day extension to 10 June. A short extension will get the government a better coordinated bid and more competitive pricing. Please consider.

Response: Proposal due date has been extended to June 10, 2020, see amendment 0002.

65. Reference specification 22 13 29, paragraph 2.2.1 Pump Characteristics. In the design data chart for the pump-s at the Influent (Wet Well) Pump Station and the Oil / Water Separator Pump Station, there are two points that need clarification: 1. The pumps are listed as submersible grinder pumps. Are grinder pumps required for Industrial Waste, since there should not be any organic material in the waste stream? Would a submersible effluent pump be a better choice?

Response: Refer to revised specification 22 13 29, dated 05/21/2020

66. Reference specification 22 13 29, paragraph 2.2.1 Pump Characteristics. In the data chart, the depth of submergence for the pumps is listed as 2 feet for pumps at the influent pump station and oil/water separator pump station. On Drawing CU104, Pump Station Information detail, the low water alarm setting is 2.5 feet off the bottom of the wet well, and the high alarm depth is

8.0 feet. On drawing CU601, the Oil / Water Separator Pump Station Information detail lists the pump low water level alarm at 10.5 and the high-water alarm level as elev. 15.5. Please confirm the submergence depth ratings for the pumps.

67. Reference plan view on CD200, the influent piping for pumps P-53, P-54, and P-55 are labelled as 6” DIP. Section A of this sheet illustrates the gate valves to be demolished labeled as 4” gate valves. In the plan view on Drawing CU200, Equalization Basin Plan, the pump suction piping is labelled as 6” DIP and there is a call-out for motor actuated 6” gate valves, stems, and bonnets (typical of 2). In the elevation view on Drawing CU201, Section1 the valve for one basin is called out “Motor actuated 6” gate valves, stems, and bonnets (typ. of 2), but the valve for the other tank is labelled 4” gate valve. What is the correct size for the valves and DI piping?

68. This project involves extensive bid coordination between divisions of work throughout various industrial waste treatment processes spread across the plant. Our trade partners are working hard to generate competitive pricing but have required considerable time just in absorbing the drawings, specifications, plant processes, and work restrictions therein to develop questions.

The project was solicited Monday 27APR with a site walk scheduled just 3 days later Thursday 30APR. Vendors and trade partners were into documents heavily the follow Monday 04MAY but again took many days to comprehend all the different process pieces involved in the project to develop their questions. In consideration of a suitable response time for the government of RFI’s, review time for responses, and acknowledging the Memorial Day weekend with the bid due just one day after the holiday; we respectfully request a 14-day extension to 10 June. A short extension will get the government a better coordinated bid and more competitive pricing. Please consider.

Response: Proposal due date has been extended until June 10, 2020, see amendment 0002.

69. Please provide information on the following:

Designated areas for construction trailers and laydown areas Designated parking areas for construction crews and supervision Any crane height restrictions in the wastewater treatment area

70. Please confirm if there is a specification or requirement for use of domestically sourced materials.

71. The geotechnical report included in the specifications does not state whether or not the soils are classified as non-contaminated, contaminated non-hazardous, or hazardous. Can The assumption be made that all soils are noon-contaminated?

72. Should dewatering be required, has any water testing been completed to determine if groundwater is contaminated and would require onsite treatment or off-site disposal?

73. E001 notes 10 & 11 reference hazardous areas. Please identify which areas are considered hazardous.

74. C001 states that the wetlands boundary was defined in 2014. Will this boundary need to be redefined prior to starting construction? If so, who is responsible for this and is it safe to assume that the boundary line will not change such that it impacts the project or requires any additional permits?

75. Temporary piping to divert waste sludge from the existing simplex pump station to Temporary holding tank requires that this Temporary line be continuously manned while The CO is operating the existing dewatering system. Can it be assumed that The CO Will only be performing dewatering operations during normal working hours as detailed in The RFP documents?

76. In specification section 02-83-00 Lead Remediation section 1.3 states that “No assessment of cadmium or chromium in coatings was requested or performed. Therefore, all coatings within the proposed project area should be presumed to contain cadmium and chromium and managed accordingly until proven otherwise”. However, all other references to cadmium and chromium have been deleted from the specification. Can it be assumed that no testing or abatement for coatings containing cadmium or chromium will be required?

Response: Submit Proposals in accordance with RFP, Specifications, Drawings, and all Amendments.

77. Should there be a valve on the 4” CTF bypass line? See CU300.

78. NPW on CU800 shown as 2" to Booster Pumps, I400 has lines listed as 1.5". Please Clarify.

79. Please confirm wall casting in Effluent Flume structure is 10” or 12”. CU600 shows a 12” casting while CU 400, 600, CS012-13 show a 10” DI line.

Response: Refer to revised drawing 12798764 (CU600), dated 05/21/2020.

80. Confirm 3” DI piping from NaoH bulk tank to feed pumps. See note in section view 4, CU301 calls for DI piping, while I500 calls for 3” CPVC.

Response: Refer to revised drawing 12798757 (CU300), dated 05/21/2020.

81. Aluminum Sulfate and Sulfuric Acid call for 2” CPVC on CU301, 303, while I500 calls for 3” CPVC line. Please confirm.

Response: Refer to revised drawing 12798813 (I500), dated 05/21/2020.

82. I101 calls for a 4” line from P-OW1 increasing to 6” at tie in point while CU601 shows the line increasing to 6” in the tank and increasing again at the tie in point. Please clarify.

Response: Refer to revised drawing 12798765 (CU601), dated 05/21/2020.

83. Is the intent of the Polymer system to have the Polymer blending skid primarily feed to the day tank with an option to bypass and direct feed with valving, and P-39 do the injection in normal operation? Please review and advise.

84. The submersible pump discharge calls for a 6" common header on section view 1 and a discharge to tie in point line of 8" tying into a 10" existing. The overhead view shows an 8" common header and a 10" at tie in point. I101 shows the pumps tying into an 8" existing and does not show the emergency pumping stations. Please clarify all pipe sizes and desired discharge from pumps as 4" or 6", and Auxiliary Emergency Pump Piping as 8" or 6".

85. For concrete structures being demolished, is the intent to remove the entire foundations, or can the structures be demolished to below grade and abandoned in place? If abandoned in place, at what depth should they be demolished.

86. Can cut sections or dimensions with rebar sizing and spacing for all concrete structures being demolished be provided?

87. Can thicknesses and reinforcement details for all concrete and asphalt pavements being demolished be provided?

88. Please confirm that the chain link fence demolition scope on DWG CD012 should only include fence in place over concrete that is to be removed.

Response: Submit Proposals in accordance with RFP, Specifications, Drawings, and all Amendments.

89. Horizontal concrete spall repairs are not indicated on drawing SU300 where the existing sulfuric acid tank concrete saddles are called out for demolition on CD300. Please indicate on drawing SU300 if horizontal spall repairs are required?

90. Concrete spall repairs are not indicated on drawing SU300 where existing aluminum sulfate chemical pumps P-33 and P-36 pads are called out for demolition on CD300. Please indicate on drawing SU300 if horizontal spall repairs are required.

91. At the effluent piping of the continuous treatment tanks drawing CU300 calls out to REINSTALL

EXISTING 10” PIPING AND APPURTENANCES. Drawing CU301 section 1 at the effluent piping indicates to REINSTALL EXISTING 8” AND 10” PIPING AND APPURTENANCES. Please confirm if only the 10” effluent piping is to be reused and new 8” piping provided or if both the existing 8” and 10” piping at the CTF effluent is to be reused.

92. At the effluent piping of the continuous treatment tanks the drawing calls out for 10” GATE

VALVE W/ CHAIN OPERATOR TYP. AT T-11 & T-11A. The piping on either side of the gate valve is shown as 8”. Please confirm the size of the gate valves with chain operators. Are valves to be 8” or is piping to be 10”.

93. On drawing CU300 the exterior chemical containment pits at building elevation north-east are called out to receive IMMERSION high performance coatings. The interior containment pits are called out to receive NON-IMMERSION high performance coatings. Please clarify if the exterior containment pits were noted on error to callout IMMERSION and these pits should receive NON- IMMERSION coatings.

94. On drawing CU300 the exterior chemical containment pits at building elevation north-east are called out to receive high performance coatings but the chemical containment pits at building elevation north-west are not. Please confirm intent was to exclude high performance coating at chemical containment pits at building elevation north-west.

95. On drawing CU301 detail 3 of the batch tanks please clarify what is being illustrated. Are the batch tanks needing to be modified to receive 4” 150# flanges for ORP and pH probe connections or are these existing 4” 150# flange connections already in place? If the tanks are to be modified the existing batch tanks would be prone to losing any manufacturer certifications.

96. Please provide the as-built record drawings “CONTINUOUS TREATMENT FACILITY” numbered

4237147 thru 4237152 and “VPP-INSTALL FALL PROTECTION FOR CTF TANKS AT IWTP BUILDING 4380” numbered 12714529 thru 127714535 indicated on drawing SU300 plan note #4 so accurate/competitive pricing for the removal and re-installation of the existing stairs, catwalk, & mezzanine can be developed.

97. On drawing SU800 please clarify the opening size required for the new conveyor penetration.

Neither plan nor detail provide size of opening required.

Response: Refer to revised drawing 12798799 (SU800), dated 05/21/2020.

98. Please specify the height of the sludge/scum containment wall that the stairs indicated on drawing SU700 need to run up and over.

Response: Refer to revised drawing 12798797 (SU700), dated 05/21/2020.

99. Drawing E700 note #3 states to, utilize the existing heat trace circuitry to provide heat trace for the exposed piping of the sludge/scum storage tank. Reference the CU700 series for what piping requires heat racing. No heat tracing is indicated on the exposed piping of the sludge/scum tank within the CU700 series drawings. Please identify what piping requires heat tracing?

Response: Refer to revised drawings 12798766 (CU700) and 12798767 (CU701), dated 05/21/2020.

100. Drawing E007 & E103 single line diagram shows and corresponding note #5 on E007 and

#2 on E103 describes that the existing emergency pump is the be reconnected to the new SWBD-IWTP. In the demolition plans, drawing CD010, has the existing emergency pump shown for demolition. Please provide clarification on drawing E103. Is the pump being demolished or required to stay and be reconnected to new SWBD-IWTP.

Response: Refer to revised drawings 12798820 (E007) and 12798824 (E103), dated 5/21/20.

101. Drawing E101 shows 13 sections for the new MCC-IWTP. Drawing E105 shows 12 sections with the 12th section being spare. Please clarify if E101 is supposed to have 12 sections shown or if E105 should show 13 sections.

102. The electrical drawings call out specifically for some existing raceway/conduits to be reused. For example, the existing conduit in place along the pipe trestle from building 1005 to the existing MCC-CTF is to be reused and new conductors installed as noted on drawing E103 (note #1) to feed the new MCC-CTF from new SWBD-IWTP; extending raceways as required. For other existing raceways for power, control, and integration, that are in place but not specifically called out to be reused for equipment being replaced/upgraded is it acceptable to reuse the existing raceways or are all conduit runs listed in the conduit and wire schedules of the documents required to be new?

103. Drawing CS011 indicates asphalt patch for new electrical duct bank. Typical asphalt pavement patch detail on CS900 illustrates 12” minimum flowable fill on top of compacted subgrade. The new electrical duct bank for the gate operator and polymer building will sit on existing subgrade. Please confirm 12” of flowable fill on top of the new duct bank is required or if full thickness compacted ABC stone from the top of duct bank to the 1.5” S9.5B surface course is acceptable.

104. Drawing E100 shows panel ‘B’ and panel ‘W’ to remain. Drawing E103 single line diagram does not show these panels in new SWBD-IWTP. Please clarify if both panels are to be reconnected to the new electrical configuration.

Response: Refer to revised drawings 12798824 (E103), 12798827 (E106) & 12798833 (E112), dated 05/21/2020.

105. Drawing E105 shows rooftop fan No. 1 to be interlocked with L-2 (louver No. 2). Please confirm this should be interlocked with L-1 (louver No. 1).

Response: Submit Proposals in accordance with RFP, Specifications, Drawings, and all Amendments.

106. Drawing CD100 does not show the existing flow transmitter to be demolished and drawing CU100 does not indicate new. On drawing E107 please clarify if the existing influent primary flow indicating transmitter and flow element at the headworks is existing to remain or existing to be replaced.

Response: Refer to revised drawing 12798750 (CU100), dated 05/21/2020.

107. Drawing CU301 detail 3 illustrates an ORP probe connection and pH probe connection at each batch tank. Drawing E306 is showing batch tank T-1A (acid/alkali) with a level transducer and pH analyzer (no ORP). Batch tank T1-B (cyanide) with a level transducer, pH analyzer, and ORP analyzer. Batch tank T1-C (chrome) with a level transducer, pH analyzer, and ORP analyzer.

Please clarify the process instruments at the existing batch tanks. Are level transducers shown correctly on all three batch tanks and ORP analyzers only at T-1B & T-1C but not T-1A?

Response: Refer to revised drawing 12798758 (CU301), dated 05/21/2020.

108. Please clarify the process instruments at the continuous treatment tanks. CD300 series drawings do not indicate the existing ORP or pH analyzers to be demolished. CU300 series drawings do not indicate new analyzers. Are the ORP and pH analyzers at the continuous treatment tanks to remain for reuse or to be demolished and new provided?

Response: Refer to revised drawing 12798721 (CD301) and 12798758 (CU301), dated 05/21/2020.

109. On drawing CU104 section 1 the outlet piping of the three new submersible pumps is shown as 4” into 4” gate valves, followed by 4” check valves, to a 4”x6” increaser, then a vertical 6”x6” tee, following by a 6”x8” increaser to then a 90 bend incorrectly labeled as a 6” gate valve.

The existing pipe size shown to tie into on the pipe trestle is 10”. Please clarify the labeling of 90° bend turning vertical towards the submersible pumps. The plan view shows this as a 10” 90° bend. Please clarify the 6”X8” increaser since existing pipe to tie into is 10”. Two 8”x8” tees are shown on the plan view. Please clarify the 6”x6” tee shown in the section view in relation to the 8”X8” in the plan view. Emergency piping from the spill containment pit is also 8”, not 6”. An elevation view adjacent to the three new submersible pumps would greatly help clear up the design intent of the pipe arrangement.

110. The plan view on drawing CU104 illustrates the new emergency pipe arrangement from the tie in point over to the spill containment area as being overtop of the submersible pumps.

The configuration of the piping appears to restrict the removal of two of the three submersible pumps below the monorail hoist way. Consider revising so that all three pumps can be easily removed.

111. On drawing CU301, section 4 has the sodium hydroxide piping noted to be 3” unlined ductile iron with flanged fittings. On CU303, section 2 typical metering pump suction and discharge shows the chemical header pipe as 2”. Where does the sodium hydroxide piping transition from 3” to 2”? Where does the sodium hydroxide piping transition from ductile iron to

CPVC?

112. After reading through the documentation, we fully understand the Allen Bradley PLCs will be required. However, for the HMI/SCADA software, we do not completely understand the requirements as they relate to the existing Wonderware system. Is the intention to replace the existing system with a newer software?

113. Does the Government have any limitations on OEM’s furnishing the power equipment like MCC’s and Switchboards?

114. Note 8 states for water line to be demolished. Please provide more information on this item (pipe size, pipe material, approximate length to remove, potable or non-potable, etc.)

(E100).

115. The Dwg shows a Combustible Gas Detection Sensor. Is this existing (to be relocate) or new. Also, if new, please provide information on cable requirements (does it wire to an alarm in a different area, or only a local alarm). (CU100)

Response: Submit Proposals in accordance with RFP, Specifications, Drawings, and all Amendments.

116. Booster water belt wash pump shows a 2" bypass for the solenoid valve, however I400 does not show the bypass. Please confirm whether it is required. (CU801)

Response: Refer to revised drawing 12798812 (I400), dated 05/21/2020.

117. Shows a vent line being replaced with HDPE, please confirm HDPE is preferred over

CPVC or PVC piping. Also please confirm the limits of replacement (suction side of blower only, or also on discharge side of the blower). (CU500)

118. Specifications call for inlet and outlet expansion couplings, and inlet and outlet silencers.

Drawings CU300, CU301 and CD350 do not indicate silencers and or expansion joints. Are silencers and expansion joints required? (Section 43 11 00 Pg. 8, Item 2.10.2)

Response: Refer to revised specification 43 11 00, dated 05/21/2020.

119. The CTF Tanks are designed with steel legs. How many anchor bolts per leg, and what type and size anchor bolt should be used? (Section 43 41 16.16 40 Page 4, Item 2.2)

120. Item 2.2.3.1 of the same referenced section states to include the number of pumps shown on the drawing. Drawing CU300 indicates 24 pumps. Drawing CU500 indicates one (1) pump however it is a relocated pump. Please confirm there are only 24 new Chemical Diaphragm Pumps to be supplied and installed? (Section 46 30 00 page 5, item 2.23 _ 26 each Chemical Diaphragm Pumps)

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