N4019220R1300_Amendment 0002_15JUL2020.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

FY21 SPECIAL PROJECT RM 14-1420, Repair Lima Wharf, Naval Base Guam

See Continuation Page.

1. CONTRACT ID CODE PAGE OF PAGES

J 1 4

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

16C. DATE SIGNED

BY 15-Jul-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 N4019220R1300

X 9B. DATED (SEE ITEM 11)

16-Jun-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, 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-Jul-2020

CODE

COMMANDING OFFICER - NAVFAC MARIANAS

MAR MCON

PSC 455, BOX 195

FPO AP 96540-2937

N40192 7. ADMINISTERED BY (If other than item 6)

4. REQUISITION/PURCHASE REQ. NO.

CODE

See Item 6

FACILITY CODECODE

EMAIL:TEL:

N4019220R1300

SECTION SF 30 BLOCK 14 CONTINUATION PAGE

SUMMARY OF CHANGES

SECTION SF 30 - BLOCK 14 CONTINUATION PAGE (SF 30)

The following have been added by full text:

AMENDMENT 0002

A. In accordance with FAR 52.252-3 Alterations in Solicitation (APR 1984), portions of this solicitation are altered as follows:

1. Incorporate the following revisions to NAVFAC Specifications WON 1383711:

a. SECTION 35 20 23 DREDGING

1.9 Quantity of Material

Revise paragraph to read as follows: “The total estimated amount of material to be removed from within the specified limits, including side slopes, is 4840 cubic yards. The estimated quantity for bidding purposes and for application of the "FAR 52.211-18, Variation in Estimated Quantity" shall be 4840 cubic yards, which is the total quantity, including overdepth. The quantities listed are estimates only. Within the limits of available funds, complete the work specified whether the quantities involved are greater or less than those estimated.”

B. Notice 2 is provided in response to requests for information and is provided herein as Enclosure (1). Notice 2 is provided for INFORMATION ONLY. The solicitation remains unchanged unless it is amended in writing.

C. The date for receipt of proposals remains unchanged at August 31, 2020 at 4:30pm local time.

D. Offerors shall acknowledge this amendment in Block 19 of the Standard Form 1442 with their proposals.

SECTION 00 45 00 - REPRESENTATIONS AND CERTIFICATIONS

The following have been added by reference:

252.225-7973 (Dev) Prohibition on the Procurement of Foreign-Made Unmanned

Aircraft Systems - Representation (DEVIATION 2020- O0015)

MAY 2020

The following have been deleted:

CLASS DEVIATIONS

252.225-7973 PROHIBITION ON THE PROCUREMENT OF FOREIGN-MADE UNMANNED AIRCRAFT

SYSTEMS—REPRESENTATION (MAY 2020) (DEVIATION 2020-O0015)

SECTION 00 70 00 - CONDITIONS OF THE CONTRACT

The following have been added by reference:

52.202-1 Definitions JUN 2020 52.203-6 Restrictions On Subcontractor Sales To The Government JUN 2020 52.203-7 Anti-Kickback Procedures JUN 2020 52.203-12 Limitation On Payments To Influence Certain Federal

Transactions

JUN 2020

52.203-13 Contractor Code of Business Ethics and Conduct JUN 2020 52.204-10 Reporting Executive Compensation and First-Tier

Subcontract Awards

JUN 2020

52.209-6 Protecting the Government's Interest When Subcontracting With Contractors Debarred, Suspended, or Proposed for Debarment

JUN 2020

52.210-1 Market Research JUN 2020 52.215-2 Audit and Records--Negotiation JUN 2020 52.215-11 Price Reduction for Defective Certified Cost or Pricing Data--

Modifications

JUN 2020

52.215-13 (Dev) Subcontractor Certified Cost or Pricing Data - Modifications (Deviation 2018-O0015)

JUN 2020

52.222-35 Equal Opportunity for Veterans JUN 2020 52.222-36 Equal Opportunity for Workers with Disabilities JUN 2020 52.222-37 Employment Reports on Veterans JUN 2020 52.223-18 Encouraging Contractor Policies To Ban Text Messaging

While Driving

JUN 2020

52.227-2 Notice And Assistance Regarding Patent And Copyright Infringement

JUN 2020

52.228-11 (Dev) Pledges of Assets (DEVIATION 2020-O0016) APR 2020 52.228-15 (Dev) Performance and Payment Bonds-Construction. (Deviation

2020-O0016)

JUN 2020

52.244-6 Subcontracts for Commercial Items JUN 2020 252.225-7972 (Dev) Prohibition on the Procurement of Foreign-Made Unmanned

Aircraft Systems (DEVIATION 2020-O0015)

MAY 2020

252.232-7017 Accelerating Payments to Small Business Subcontractors-- Prohibition on Fees and Consideration

APR 2020

ADDITIONAL CLAUSES

52.202-1 Definitions NOV 2013 52.203-6 Restrictions On Subcontractor Sales To The Government SEP 2006 52.203-7 Anti-Kickback Procedures MAY 2014 52.203-12 Limitation On Payments To Influence Certain Federal OCT 2010

Transactions 52.203-13 Contractor Code of Business Ethics and Conduct OCT 2015 52.204-10 Reporting Executive Compensation and First-Tier

Subcontract Awards

OCT 2018

52.209-6 Protecting the Government's Interest When Subcontracting With Contractors Debarred, Suspended, or Proposed for Debarment

OCT 2015

52.210-1 Market Research APR 2011 52.215-2 Audit and Records--Negotiation OCT 2010 52.215-11 Price Reduction for Defective Certified Cost or Pricing Data--

Modifications

AUG 2011

52.215-13 (Dev) Subcontractor Certified Cost or Pricing Data - Modifications (Deviation 2018-O0015)

JUL 2018

52.222-35 Equal Opportunity for Veterans OCT 2015 52.222-36 Equal Opportunity for Workers with Disabilities JUL 2014 52.222-37 Employment Reports on Veterans FEB 2016 52.223-18 Encouraging Contractor Policies To Ban Text Messaging

While Driving

AUG 2011

52.227-2 Notice And Assistance Regarding Patent And Copyright Infringement

DEC 2007

52.244-6 Subcontracts for Commercial Items AUG 2019

(End of Summary of Changes)

DEPARTMENT OF THE NAVY

NAVAL FACILITIES ENGINEERING COMMAND MARIANAS

PSC 455, BOX 195

FPO AP 96540-2937

N4019220R1300 Notice 2

15 July 2020

NOTICE 2

REQUESTS FOR INFORMATION AND RESPONSES

SOLICITATION N4019220R1300 FY21 SPECIAL PROJECT RM 14-1420

REPAIR LIMA WHARF, NAVAL BASE GUAM

QUESTION (Q) 7: Construction Site Plan – Reference RFP Part B, Specification Section 01 50 00 Temporary Construction Facilities and Controls, Paragraph 1.3 Construction Site Plan:

Please specify the available locations for the onsite temporary facilities described under the Construction Site Plan section including the allowable connection points for water and electric power utilities. This will avoid the possibility of the Contractor occupying any restricted areas or areas being utilized by other entities.

Answer (A) 7: For the electric power connection, the estimated distance is ~2,000 feet from the identified laydown areas. For the water connection, the estimated distance is ~300 feet from the identified laydown areas.

Q19: Test Piles – Reference RFP Part B, Specification Section 31 41 16 Metal Sheet Piling, Paragraph

3.3.2.2 Driving, Item L:

Paragraph 3.3.2.2.L states “Employ a specialty engineering firm to perform dynamic testing of piles….”

There are no test piles called out for the bulkhead piles on the drawings. Please clarify if test piles are required for the bulkhead and provide their quantity and location.

A19: There are no test piles for the bulkhead piles. Contractor shall employ a specialty engineering firm to perform wave equation (WEAP) analysis to select a suitable hammer and to evaluate pile driving operations for king piles and sheet piles. An amendment will be issued at a later date to clarify the intent of paragraph 3.3.2.2.L.

Q21: Vibratory Hammers – Reference RFP Part B, Specification Section 31 41 16 Metal Sheet Piling, Paragraph 3.3.1.1 Driving Hammers:

Paragraph 3.3.1.1 states that “Vibratory hammers shall not be used”. We would like the designer to consider the use of a vibratory hammer for the initial driving of the piles. The use of a vibratory hammer will greatly increase the safety and efficiency of the operation and make the 850 calendar day schedule requirement more feasible. Please consider allowing the use of a vibratory hammer to install the bulkhead piles at least until the penetration rate indicates the tip of the piles have reached a dense layer with increasing resistance. This will allow for the safe handling and installation of the bulkhead piles and will greatly improve the accuracy and quality of the bulkhead wall installation.

A21: Vibratory hammers are not permitted due to the presence of dense material at the site and concerns that the vibration may damage the existing bulkhead and utilities.

Q22: Dredge and Scow(s) – Reference RFP Part B, Specification Section 35 20 23 Dredging:

(a) If the Contractor uses a dredge and scow(s) to perform dredging work on this project, do the dredge and scow(s) need to be built in the United States to comply with applicable Federal laws including the Foreign Dredge Act?

(b) Do the dredge and scow(s) performing work on this dredging project need to be owned by a U.S.

Citizen to comply with applicable Federal laws including the Foreign Dredge Act?

If the answer is “no” to either of the above questions, as a U.S. dredging contractor that is in full compliance with applicable Federal laws including the Foreign Dredge Act, our dredging subcontractor may decline to submit a proposal due to the unfair advantage afforded to competitors using a foreign built dredge and/or a dredge owned by non-U.S. citizen.

A22: The Foreign Dredge Act, as amended, applies to this contract.

Q23: Bilge and Oily Waste Treatment System – Reference RFP Part B, Specification Section 40 42

60.20 Bilge and Oily Waste Treatment System, Paragraph 2.7.1 Screw Press, and RFP Part C, Drawings M-002 (Mechanical Legend, Symbols, Abbreviations, and Bill of Materials), M-101 (Bilge Oily Waste Treatment (BOWT) Equipment Plan), and M-601 (Bilge Oily Waste Treatment (BOWT) Flow Diagram - 1):

(a) Paragraph 2.7.1 requires Screw Press - The documents we received do not have the capacity or performance requirements. The documents specify a Huber Screw Press but do not identify a model, only that the screw has brushes. The drawings also call out a filter press, not a screw press.

Please clarify if screw press or filter press is required and provide performance requirements.

(b) Please provide equipment schedule for the following:

(i) Sludge Pumps

(ii) OWS Effluent/Recycled Pumps

A23: (a) Contractor shall provide a filter press of minimum 20 cubic foot capacity for solids dewatering.

Filter press shall be integral to a structural frame consisting of a fixed head end, movable follower, tail end assembly and sidebar rails assembly and sidebar rails. The frame shall be adequate to support its own weight, the weight of the filter plates and the entire assembly completely filled with sludge and pressurized for dewatering. All steel surfaces shall be free of dirt, grease, and foreign matter, and finished with a two part finish consisting of primer and a gloss enamel finish. The filter press shall have an integral controller with a single level style handle that allows control of the hydraulic equipment. The filter press cake shall be 1.25” in thickness. The filter press shall be provided with a roll out tray underneath the press to accept the caked material. An amendment will be issued at a later date to clarify the requirements.

(b)(i) Sludge Pump: Pumps that pump sludge to the filter press shall be capable of delivering sludge to a rate of 180 gallons per minute, with priming, NPSH, and Total dynamic head requirements selected appropriately. An amendment will be issued at a later date to clarify the requirements.

(b)(ii) OWS Effluent / Recycled Pumps: OWS sludge pumps shall be of 5.5 gallon per minute capacity per design documents, with priming, NPSH and total dynamic head as required by the pipe size, material and routing. An amendment will be issued at a later date to clarify the requirements.

Q24: Dredging Quantity – Reference RFP Part B, Specification Section 35 20 23 Dredging, Paragraph

1.9 Quantity of Material:

Paragraph 1.9 shows a dredging quantity of 5,800 cubic yards while base bid item 0001Kb breakdown shows a bid quantity of 4,840 cubic yards. Please clarify.

A24: Use a bid quantity of 4,840 cubic yards. Refer to RFP Amendment 0002.

Q25: Off-Loading Site – Reference RFP Part B, Specification Section 35 20 23 Dredging:

Please advise if there is a designated off-loading site for the dredged materials. If so, please indicate the location.

A25: Off-loading of dredge material must be contained within the project footprint.

Q26: Dredging and Sheet Pilings – Reference RFP Part B, Specification Section 31 41 16 Metal Sheet Piling, Paragraph 3.3.2.1 Placing:

Regarding sentence #1, “Any excavation required within the area where sheet pilings are to be installed shall be completed prior to placing sheet pilings”, please clarify if the intent is to complete the dredging prior to placing the sheet pilings.

A26: Intent is to protect new sheet piling structures such as the cutoff wall. An amendment with revised specification will be issued at a later date to clarify intent.

Contractor is responsible for selecting the sequence of work activities. If Contractor elects to perform dredging after installation of sheet piles, the Contractor must take care not to damage the sheet pile coatings during dredging activities.

Q27: Use of Base Landfill (Disposal):

Can we dispose of the following items at the Base Landfill?

(a) Excavated surplus materials

(b) Debris and other construction wastes

A27: No, do not dispose of these items at the Base Landfill.

Q28: Probing of the Existing Batter Pile – Reference RFP Part C, Drawing No. S-605 (Ground Improvement Section - 1):

(a) Existing crane rails and concrete tie-beams will be removed and the existing concrete piles will remain. Please confirm that in spite of the piles being abandoned in place, probing is still required.

(b) Please advise what the purpose of the probing is, and please advise when it is required.

(c) Note 2 requires probing "sufficient" number of piles. Please advise how many piles is considered sufficient.

(d) According to a specialty contractor, using a PIT equipment called a “pulse echo method” can only measure about 20' to 40' of pile length depending on soil resistance. Please confirm if this information is correct.

A28: (a) Yes, probing is still required.

(b) Probing is required to identify piles to facilitate ground improvement. It shall be done prior to ground improvement.

(c) Excavation to adequate depth would help identify the top of the piles. It is up to contractor to determine the number of probing locations to confidently identify length and locations of all the batter piles.

(d) Contractor shall choose appropriate probing method.

Q29: Building 2078 Demolition - Structure and Equipment – Reference RFP Part A, SF1442, Price Proposal Schedule, and RFP Part C, Drawing Nos. CD110 (BOWTS Site Demolition Plan - 2) and H-202 (Hazardous Materials Photo - 2):

Based on photo description on sheet H-202, notes on CD-110, and the SubCLIN descriptions, we interpret “0001Mb Base Bid Item M - Lead-Based Paint Removal and Disposal” to include the removal and disposal of the Building 2078 steel structure, mechanical equipment, and piping that is not specifically detailed in other SubCLINs. Please confirm this assumption, and if not confirmed, please identify the SubCLIN to include the cost for these items.

A29: The price proposal schedule will be amended to clearly define Building 2078 demolition.

“0001Mb Base Bid Item M - Lead-Based Paint Removal and Disposal” only covers removal, containment, and safe disposal of lead based paint. In accordance with Sheet H-202, “Assume all painted surfaces are lead based paints for Building 2078 and other structures.”

Q30: Base Bid Item O – Reference RFP Part A, SF1442, Price Proposal Schedule, SubCLIN 0001O Base Bid Item O - Demolition of Unforeseen Existing Utilities:

The description verbiage of “removal, containment, and safe disposal” indicates the possibility that this SubCLIN may include handling of hazardous material. Please confirm that this SubCLIN does not include handling of hazardous material. If the SubCLIN does include handling of hazardous material, please identify what hazardous material handling to include in the unit price.

A30: Confirmed. SubCLIN does NOT include handling of hazardous material.

Q31: Base Bid Item P – Reference RFP Part A, SF1442, Price Proposal Schedule, SubCLIN 0001P Base Bid Item P - Demolition of Unforeseen Concrete or Rubble:

The description verbiage of “removal, containment, and safe disposal” indicates the possibility that this SubCLIN may include handling of hazardous material. Please confirm that this SubCLIN does not include handling of hazardous material. If the SubCLIN does include handling of hazardous material, please identify what hazardous material handling to include in the unit price.

A31: Confirmed. SubCLIN does NOT include handling of hazardous material.

Q32: Importation, Placement, and Compaction of Select Fill – Reference RFP Part A, SF1442, Price Proposal Schedule, SubCLIN 0001N Base Bid Item N - Fill Import:

Please clarify where this pay item is applicable, there are numerous locations/activities requiring import select fill, refer below but not limited to the following:

(a) Detail A1/S-605 (typ), is the engineered fill to replace the excavated in-situ soil measured and paid under item 0001N?

(b) Is the import fill to replace the removed contaminated soils going to be paid under item 0001N?

A32: Deferred

Q33: ACOE Permit and Dredging Operation – Reference RFP Part C, Drawing No. CN001 (General Dredging Notes), Note 5a:

Note 5a states “Remove shoals/sediments utilizing a barge mounted closed bucket excavator in accordance with conditions and requirements as indicated in the approved Army Corp of Engineering (ACOE) permit”.

(a) Please provide a copy of the approved Army Corp of Engineering permit.

(b) Please clarify if the dredging operation is limited to the use of barge mounted equipment.

A33: Deferred

Q34: Mass Concrete – Reference RFP Part B, Specification Section 03 31 29 Marine Concrete with Service Life Modeling, Paragraph 1.2 Definitions, Item r, and Paragraph 1.7.7 Mass Concrete Temperature Control Plans:

Specification section 03 31 29, paragraph 1.2 Item r defines mass concrete as “any concrete system with a section thickness of 3 feet or more and a maximum temperature that approaches 158 degrees F within the first 72 hrs of placement”. Additionally, paragraph 1.7.7 describes the required mass concrete temperature control plan with electronic monitoring sensors and the potential use of cooling tubes. To our knowledge this hasn’t been done on Guam before and will introduce a lot of additional cost to implement in a remote location like Guam. Past projects in Apra Harbor have successfully built bulkhead and anchor walls without this mass concrete requirement.

We would like to suggest that this requirement be eliminated from the specification.

Projects in similar tropical environments such as the State of Hawaii have previously allowed mass concrete with a maximum temperature of 180 degrees F. However, due to Guam being a hotter and more humid environment than the State of Hawaii, it would be recommended that the maximum temperature be relaxed above 180 degrees F. If the mass concrete requirement can’t be eliminated, please consider increasing the maximum temperature to 185 or 190 degrees F.

A34: Deferred

Q35: Stone Column Ground Improvement – Reference RFP Part B, Specification Section 31 62 16.16 Steel H-Piles and Pipe Piles:

(a) Does the stone column ground improvement need to be completed before driving the test piles for the landside anchor wall and storm bollards?

(b) If the answer is yes, please provide the area around the piles that needs to be improved.

A35: Deferred

Q36: Coral Spawning – Reference RFP Part B, Specification Section 01 14 00 Work Restrictions, Paragraph 1.3 Special Scheduling Requirements:

Please provide the coral spawning dates for 2023.

A36: Deferred

Q37: Industrial Power Mound – Reference RFP Part A, SF1442, Price Proposal Schedule, CLIN 0004 Bid Option 3 - North End Wharf Structural Repair and Modernization:

The bid item description for Bid Option 3 – North End Wharf indicates to include one industrial power mound. Industrial Power Mound 1 (Sheet ES103), Industrial Power Mound 2 (Sheet ES104), and Industrial Power Mound 3 (Sheet ES105) are all within the Base Bid Limits of Work. Sheet ES106 which indicates the North Wharf area does not include an Industrial Power Mound.

Please confirm that Bid Option 3 does not include an Industrial Power Mound.

A37: Deferred

Q38: MEC – Reference RFP Part B, Specification Section 35 20 23 Dredging, Paragraphs 1.5 Artificial Obstructions and 1.7 Munitions and Explosives:

Paragraph 1.5 states, “Prior to dredging and/or driving of new sheet piles, the Contractor shall perform a debris survey in the dredge areas along Lima Wharf and shall remove debris encountered. Submit the debris survey and debris removal plan prior to dredging and pile driving activities.”

Paragraph 1.7 states, “Prior to start of dredging work, detect unexploded ordinance by towing a magnetic probe throughout the entire dredging areas.”

Please clarify that it is acceptable to perform debris removal and then perform the magnetometer survey prior to dredging.

A38: Deferred

Q39: MEC – Reference RFP Part A, SF1442, Price Proposal Schedule, SubCLIN 0001L Base Bid Item L - MEC Clearance:

SubCLIN 0001L Base Bid Item L MEC Clearance states, “Total price for the entire work to provide all necessary labor, material, transportation, supervision, equipment, and other incidental work required in accordance with Specification 01 57 19.01 20, complete and in accordance with the Request for Proposal.

These costs include, but are not necessarily limited to, MEC equipment and personnel mobilization/ demobilization, MEC work plans, MEC reporting, MEC Personnel, MEC safety briefings and awareness training, reduced production rates associated with debris removal, equipment, scanning, additional costs to shield equipment operators, dredge spoils drying, screening and/or broadcasting, equipment and scanning, and anomaly clearance.”

According specification section 01 57 19.01 20 paragraph 3.7.1 Low (green) Probability Areas, “The work is located in an area with low (green) probability of encountering MEC/MPPEH. Military EOD will be on-call for MEC/MPPEH construction support.”

Given the direction provided in specification section 01 57 19.01 20, the Military EOD will be on-call for MEC/MPPEH construction support and therefore the contractor will not be responsible for MEC/MPPEH clearing if encountered. Please delete SubCLIN 0001L because the MEC Clearance scope of work is not required.

A39: Deferred

Q40: Crane Rails Rehabilitation – Reference RFP Part B, Specification Section 01 57 19.01 20 Supplemental Temporary Environmental Controls, Paragraph 3.6.1 Crane Rails, and Section 02 41 00 Demolition and Deconstruction, Paragraph 3.3.2.1 Crane Rails:

In the RFP Specifications, Section 01 57 19.01 20, page 12, paragraph 3.6.1 Crane Rails, specifically states "Sections of rail that incurred greater than 20% section loss due to corrosion must be replaced in-kind to match existing profile and materials where possible."

However, the RFP Specifications, Section 02 41 00, page 10, paragraph 3.3.2.1 Crane Rails, indicates "Portions of the crane rails that exhibits more than 10% section loss due to corrosion will be considered corroded beyond reuse and must be replaced in-kind."

Please clarify which is the correct percentage of section loss due to corrosion for portion of the crane rail to be considered no longer fit for reuse.

A40: Deferred

Q41: Miscellaneous Concrete Strength – Reference RFP Part C, Drawing No. S-002 (Structural Notes - 2), General Notes (Cont.) Item C. Concrete, and RFP Part B, Specification Section 32 31 13 Chain Link Fences and Gates, Paragraph 2.3.3 Concrete, and Section 33 40 00 (Storm Drainage Utilities), Paragraph

2.4.1 Concrete:

On the RFP Part C drawing number S-002, under the General Notes item C. Concrete, the miscellaneous concrete strength is indicated as 4 KSI (4,000 psi). However, on the RFP Specifications Section 32 31 13 Chain Link Fences and Gates, page 8, paragraph 2.3.3 Concrete and the RFP Specifications Section 33 40 00 Storm Drainage Utilities, page 6, paragraph 2.4.1 Concrete, it is stated that concrete shall conform to the requirements for 3,000 psi.

Please clarify which concrete strength is correct.

A41: Deferred

Q42: Fluid-Applied Waterproofing – Reference RFP Part B, Specification Section 07 14 00 Fluid- Applied Waterproofing, Paragraphs 1.6 Warranty and 1.6.1 Roof Membrane Manufacturer Warranty:

In the RFP Specifications, Section 07 14 00 Fluid-Applied Waterproofing, page 2, paragraph 1.6 Warranty, it states "Minimum manufacturer warranty shall have no dollar limit, cover full system water-tightness, and shall have a minimum duration of 5 years."

However, on Section 07 14 00 Fluid-Applied Waterproofing, page 3, paragraph 1.6.1 Roof Membrane Manufacturer Warranty, it states "10-year no dollar limit roof system materials and installation workmanship warranty, including flashing, insulation, and accessories necessary for a watertight roof system construction."

Please clarify which warranty period is correct.

A42: Deferred

Q43: MEC/MPPEH (Landside) – Reference RFP Part B, Specification Section 01 57 19.01 20 Supplemental Temporary Environmental Controls, Paragraphs 3.7 Munitions and Explosives of Concern (MEC)/Material Potentially Presenting an Explosive Hazard (MPPEH) and 3.7.1 Low (green) Probability Areas:

(a) Considering that the work is located in an area with low (green) probability of encountering MEC/MPPEH, please advise what kind of landside MEC/MPPEH activities will the Contractor need to do before any demolition activities and building construction begins.

(b) Please confirm what the Target of Interest (TOI) for landside MEC work is.

A43: Deferred

Q44: Manufacturer's Logo and Mill Identification Mark on Sheet Pile – Reference RFP Part B, Specification Section 31 41 16 Metal Sheet Piling, Paragraph 1.6 Delivery, Storage, and Handling:

If the manufacturer's logo and mill identification mark cannot be engraved on each individual material, is it possible to substitute the manufacturer’s logo and mill identification mark with a sticker label? The label sticker will indicate the product model, length, cast number, manufacturer and country of origin.

A44: Deferred

Q45: Minimum Sheet Pile Wall Thickness – Reference RFP Part C, Drawing No. S-109 (Bulkhead Wall Plan - 1), Notes 8 and 9:

On the Drawing No. S-109, under Notes 8 and 9, the minimum sheet pile wall thickness is 3/8 inch. When concrete coping and cathodic protection is applied to the sheet pile wall, minimal corrosion will occur.

Please provide the annual corrosion loss with anticorrosion method, the design service life, and the expected residual section modulus in order to support other options for an alternative sheet pile wall thickness.

A45: Deferred

Q46: Strength Grade of Sheet Pile – Reference RFP Part B, Specification Section 31 41 16 Metal Sheet Piling, Paragraph 2.1 Metal Sheet Piling, and RFP Part C, Drawing No. S-109 (Bulkhead Wall Plan - 1), Note 8:

The following parameter of metal sheet piling shows in the drawings.

- Yield Strength 60ksi (ASTM A572, Grade 60)

- Section Modulus 149.3in3/ft (East and North wall), 78.2 in3/ft (West wall)

The resistance moment which is calculated with the yield strength and the section modulus governs the design of wharf wall. Resistance moment for each area are calculated as follows:

- Resistance moment 8,958 k-in/ft (East and North wall), 4,692 k-in/ft (West wall)

Is it acceptable to provide metal sheet piling that exceed the required resistance moment by furnishing metal sheet piling with section moduli greater than 149.3 in3/ft and 78.2 in3/ft and having a yield strength lower than 60 ksi?

A46: Deferred

Q47: Stone Column Measurement and Payment – Reference RFP Part B, Specification Section 31 62 00 Stone Columns, Paragraphs 1.4.1 Unit Price and 1.10 Measurement and Payment, and RFP Part A, SF1442, Price Proposal Schedule, SubCLIN 0001B Base Bid Item B - Stone Columns:

In the price proposal schedule Base Bid Item B Stone Columns has a quantity of 34,270 CY.

Paragraph 1.4.1 Unit Price item a. states, “Area replacement shall be measured as a percentage of the total volume of improved ground, as shown on the plans.” Paragraph 1.4.1 item d. also states, “Cost for all borings/CPTs, laboratory testing, and monitoring shall be included in the unit cost for stone.”

Paragraph 1.10.1.1 Stone Columns states, “Measurement will be in metric tons of stone installed.”

Paragraph 1.10.1.2 Verification Testing states, “Measurement will be in numbers of borings and CPT soundings conducted.” Paragraph 1.10.2 Payment for Stone Column Construction states, “Payment will be per metric ton of stone installed per plan.”

(a) Currently Base Bid Item B has a unit of measure in CY, which appears to be consistent with Unit Price section 1.4.1. However, Base Bid Item B and Paragraph 1.4.1 item d conflict with the measurement and payment paragraph of 1.10.2 which states that stone columns will be paid per metric ton. Please clarify how the stone columns will be measured and paid.

(b) Also, paragraph 1.4.1 item d states that borings and CPTs will be included in the unit cost for stone.

Paragraph 1.10.1.2 implies that the verification testing will be measured and paid separately. Please clarify if the verification testing is included in Base Bid Item B.

A47: Deferred

Q48: Notice of Award:

How long after the submittal of bids can the contractor assume that the notice of award will be provided?

A48: A projected contract award date is not available at this time.

Q49: Reference Drawings – Reference RFP Part C, Drawing No. SD101 (General Demolition Plan):

The following list of reference drawings is provided in Sheet SD101

- FY89 MCON Project P-130 Wharves Power Improvement

- Rehabilitation of Wharves "L" to "P" Apra Harbor

- Apra Harbor Existing Bulkhead (1949, Revised 1954)

- Guam Apra Harbor Survey Summary 2018 (2018)

It is requested that a copy of these reference drawings be provided for contractors' review.

A49: Deferred

Q50: Slotted Drain Opening – Reference RFP Part C, Drawing No. CU505 (Miscellaneous Details - 6):

Detail B1 does not provide information on slotted drain opening width.

(a) Please provide opening width dimension.

(b) Please provide details if slotted drain opening is to have a covering.

A50: Deferred

Q51: Construction Joints – Reference RFP Part C, Drawing No. S-006 (Structural Typical Details):

Detail A on Sheet S-006 shows details for construction joints. Please clarify if there is a maximum allowable spacing of construction joints along the bulkhead cap or deadman anchor block.

A51: Deferred

Q52: Expansion Joint – Reference RFP Part C, Drawing No. S-109 (Bulkhead Wall Plan - 1):

Please confirm if an expansion joint is required to be placed between the 1" gap between the new end anchor cap and new anchor cap?

A52: Deferred

Q53: Interference from Existing Concrete Piles – Reference RFP Part C, Drawing No. S-113 (Bulkhead Wall Plan - 5 (Base Scope)):

The new north cutoff wall and deadman anchor shows king piles and H-piles in locations that potentially have interference from existing concrete piles. Please clarify if the contractor is allowed to remove existing concrete piles that interfere with new king pile and H-pile locations.

A53: Deferred

Q54: Existing Sheetpile Wall and Cutoff – Reference RFP Part C, Drawing No. S-113 (Bulkhead Wall Plan - 5 (Base Scope)):

Existing Sheetpile wall deadman is shown to cross through the new anchor wall.

(a) What is the elevation of the existing tie rods at the existing north sheetpile wall and north sheetpile deadman wall? Please confirm that the existing tie rods do not interfere with new anchor wall pile cap soffit at elevation +0.25'.

(b) Please also confirm that the top of the existing north sheetpile deadman wall can be cutoff below pile cap soffit elevation at elevation +0.25'.

A54: Deferred

Q55: Lift Requirement – Reference RFP Part C, Drawings Nos. S-301, S-302, S-303, S-304, and S-305 (Wharf Sections):

Note 4 on Sheets S-301 to S-305 states that the CDF will be placed in maximum 4'-0" lifts. Will this 4.0' lift requirement also need to apply for the marine conrete plug sections at the south and north ends of the new Lima Wharf bulkhead?

A55: Deferred

Q56: Chock Height/Length – Reference RFP Part C, Drawings Nos. S-526 and S-527 (Corner Fendering Details):

What is the required height/length of 12"x12" chock to be installed?

A56: Deferred

Q57: Concrete Fender Pile Elevation – Reference RFP Part C, Drawing No. S-526 (Corner Fendering Details - 1):

Please confirm top of new concrete fender pile elevations per detail A4 on drawing S-526. A top of concrete pile elevation of +1' seems low given that the top buckling leg fender is being installed 1 foot below top deck elevation or at approximately +8' elevation. Top of pile at called out +1' elevation also would make the waler beam connection point below water at (-)1' elevation.

A57: Deferred

Q58: Crane Rail – Reference RFP Part C, Drawing No. S-533 (Miscellaneous Details):

Please confirm that no reconnection of the existing pile supported crane rail foundation to the new crane rail beam is required.

A58: Deferred

Q59: Crane Rail – Reference RFP Part C, Drawing No. S-533 (Miscellaneous Details):

Project requirements state that the existing crane rail is to be re-used. Please confirm if only the rail portion is intended to be re-used or if it is the intent for all existing plates, clips, and bolts for the crane rail to be re-used as well.

A59: Deferred

Q60: Hydrocarbon Impacted Soil – Reference RFP Part C, Drawing No. H-101 (Lima Wharf - Petroleum Soil Contamination), and RFP Part B, Specification Section 02 61 13 Excavation and Handling of Contaminated Material, Paragraph 1.2.1.1 Gross Petroleum Contaminated Area (Exceeding ESL for Restricted Land Use):

(a) Confirm that the quantities provided in bid items 0001Mc and 0001Md are intended to only cover the hydrocarbon impacted soil and debris removal within the marked area shown within the vicinity of boring B-8 on sheet H-101.

(b) If hydrocarbon impacted soils that require disposal are found either outside of the marked area on sheet H-101 or at depths within the marked area above 3-ft below ground surface, please confirm if the means of compensation to the contractor the for additional hydrocarbon impacted soil will be via bid items 0001Mc and 0001Md?

A60: Deferred

Q61: Mass Concrete – Reference RFP Part B, Specification Section 03 31 29 Marine Concrete with Service Life Modeling, Paragraph 1.2 Definitions, Item r:

Typical industry standard would have mass concrete requirements applying when concrete thicknesses of 5-ft or greater are seen. It is requested that the mass concrete requirement for this project be amended to “any concrete system with a section thickness of 5-feet or more” in lieu of 3-feet.

A61: Deferred

Q62: Steel King Pile Beams and Sheet Piles – Reference RFP Part B, Specification Section 31 41 16 Metal Sheet Piling, Paragraph 2.1 Metal Sheet Piling:

Please confirm that all steel king pile beams and sheet piles for this project are not required to be hot-dip galvanized.

A62: Deferred

Q63: Pre-Drilling – Reference RFP Part B, Specification Section 31 41 16 Metal Sheet Piling, Paragraph

3.3.2.2 Driving, Item j:

Specification section 31 41 16 Metal Sheet Piling, states, “For basis of bid, Contractor shall consider that pre-drilling will be required at 65 king piles.”

(a) Please identify the 65 locations that the government anticipates pre-drilling will be required.

(b) If pre-drilling is required at more than the 65 stated locations, by what means would the contractor be compensated any additional pre-drilling effort?

A63: Deferred

Q64: Unit Price for H-Piles – Reference RFP Part B, Specification Section 31 62 16.16 Steel H-Piles and Pipe Piles, Paragraph 1.2.1 Unit Price for H-Piles:

Payment language indicates that a quantity of H-Piles to be installed should be provided in the "Schedule of Bid Items" in SF 1442, Solicitation, Offer and Award. Upon analysis of the bid proposal, no such quantity is provided. Please confirm if all installation of H-Piles are to be paid under CLIN 0001A and that no separate unit price payment CLIN bid item will be provided for this scope of work.

A64: Deferred

Q65: H-Piles and Pipe Piles – Reference RFP Part B, Specification Section 31 62 16.16 Steel H-Piles and Pipe Piles, Paragraph 2.1 Materials:

Please confirm that all H-piles and pipe piles to be driven for this project are not required to be hot-dip galvanized.

A65: Deferred

Q66: Test Piles – Reference RFP Part C, Drawing No. SB101 (Bilge Oily Waste Treatment Foundation Plan), and RFP Part B, Specification Section 31 62 16.16 Steel H-Piles and Pipe Piles, Paragraph 3.4.3.1 Test Piles:

Please confirm that the two (2) designated test piles shown on Sheet SB101 regarding the H-Pile foundations for the BOWTS structure under CLIN 0002 are subject to the same dynamic pile testing program as the wharf structure per Specification Section 31 62 16.16, Paragraph 3.4.3.1?

A66: Deferred

Q67: Dynamic Testing – Reference RFP Part B, Specification Section 31 62 16.16 Steel H-Piles and Pipe Piles, Paragraph 3.4.3.1 Test Piles:

Please confirm if dynamic testing is required for the pipe piles required to be installed under Bid Option #2 (CLIN 0002) regarding the new wharf lighting. If so, how many dynamic tests are required and at which pipe pile locations will dynamic testing be required?

A67: Deferred

Q68: Pre-Drilling – Reference RFP Part B, Specification Section 31 62 16.16 Steel H-Piles and Pipe Piles, Paragraph 3.2.5.3 Predrilling:

Upon review of the provided borings, the high blow counts in the hard limestone subsurface layers would be difficult to penetrate without the assistance of pre-drilling. It is requested that similar pre-drilling requirements that are allowable for the driving of pipe piles also be allowed for H-pile driving.

A68: Deferred

Q69: Coating – Reference RFP Part C, Drawing No. S-528 (Heavy Weather Mooring Sections and Details), and RFP Part B, Specification Section 09 97 13.28 Protection of Buried Steel Piping and Steel Bulkhead Tie Rods, Paragraph 2.1.3 Thermosetting Epoxy Coating System (TECS):

Sheet S-528 calls for a coating to be applied to the outside surfaces of the steel pipe pile per specification.

(a) Confirm that coating for steel pipe pile per specification section 09 97 13.28 is only required for the storm bollard pipe pile foundations.

(b) Confirm that coating for steel pipe pile foundations for the end anchor cap (Sheet S-524) and the steel pipe pile foundations for the new wharf lighting (Sheet S-533) is not required.

A69: Deferred

Q70: Anchorage System – Reference RFP Part C, Drawing No. S-522 (Anchorage System Details Sheet

- 1):

(a) Based on the large amount of high blow count and hard limestone subsurface layers that need to be penetrated for the installation of the driven H-pile foundations, it is suggested that the H-pile foundation be amended to a uniform full depth HP16x162 H-pile in lieu of the called out mix HP16x162/HP16x88 H-Pile to allow for the H-pile to be driven to the specified tip elevations, especially if pre-drilling would not be allowed.

(b) Due to the differing web thicknesses between an HP16x88 and HP 16x162 H-Pile, can a mechanical bolted splice be accepted in lieu of the fully welded connection? The way the anchor splice is shown on Detail B4, Sheet S-522 would create an approximately 0.25" wide gap on each side between the splice plate and the web of the HP16x88 beam that would need to be filled.

A70: Deferred

Q71: Existing Sheet Piles and Concrete Piles – Reference RFP Part C, Drawing No. S-302 (Wharf Typical Section - 2):

What are the approximate depths and tip elevations of the existing sheet piles and concrete piles at Lima Wharf?

A71: Deferred

Q72: Coating – Reference RFP Part C, Drawing No. S-501 (Wale Plan and Details):

Note in Detail B5 on Sheet S-501 calls for coating to be installed on waterside faces of sheetpiles and kings piles from elevation +1.00' to (-)50.00'. Bid Option #3 adds a new sheetpile only bulkhead wall on the west side of the north wharf with sheetpile tip elevation at (-)47.00' (See Sheet S-303). Please clarify the required elevation that coating is to extend to for the west sheetpile bulkhead wall.

A72: Deferred

Q73: Demolition of Gantry Crane Foundation – Reference RFP Part C, Drawing No. SD103 (Enlarged Demolition Plan - 2):

Please provide approximate dimensions that contractor can base demolition of existing gantry crane foundation on.

A73: Deferred

Q74: Mooring Bollard/Anchor Foundation – Reference RFP Part C, Drawing Nos. SD101, SD102, SD103, and SD104 (Demolition Plans):

There are non-uniform outlines around the existing mooring bollard/anchor demolition locations.

(a) Is the contractor to assume that these non-uniform lines represent the extent of the concrete foundation/base supporting the existing mooring bollard/anchors?

(b) Approximately how deep can the contractor assume that the mooring bollard/anchor foundation extends below existing grade?

A74: Deferred

Q75: Demolition of Existing Tie Beams – Reference RFP Part C, Drawing Nos. SD301 and SD302 (Typical Demolition Sections):

Please provide approximate dimensions that contractor can base demolition on for existing tie beams that connect between existing crane rail foundation caps that are spaced 18' O.C.

A75: Deferred

Q76: Reinforcing Specification (Epoxy Coating) – Reference RFP Part C, Drawing No. S-002 (Structural Notes - 2):

Epoxy coating ASTM A934 is only available from one source in California. A single source item could adversely impact costs & schedule. Epoxy coating ASTM A775 is much more readily available and serves the same purpose. Please confirm epoxy coated reinforcement per ASTM A775 is acceptable.

A76: Deferred

Q77: Plate Washer for Mooring Bollard – Reference RFP Part C, Drawing Nos. S-514 (Bulkhead Cap Details at Mooring Bollards) and S-529 (Mooring Hardware Details - 1):

Sheet S-514 calls out a 1" plate washer thickness for the 100-Ton mooring bollard. Detail A1 and A3 on Sheet S-529 calls out a minimum 3" thick plate washer thickness for the 100-Ton mooring bollard.

Please clarify the correct plate thickness.

A77: Deferred

Q78: BOWTS Plant – Reference RFP Part C, Drawing No. M-002 (Mechanical Legend, Symbols, Abbreviations, and Bill of Materials):

On Drawing M-002, Item #63 is a 20 HP Air Compressor. It is recommended that a roof and sides enclosure be provided due to the climate. This cover later was included for both Sierra and X-Ray Wharf BOWTS Plants.

A78: Deferred

Q79: BOWTS Plant – Reference RFP Part C, Drawing No. M-002 (Mechanical Legend, Symbols, Abbreviations, and Bill of Materials):

The Air Compressor (Item #63 on Drawing M-002) does not have any further specification or information. It is recommended that a Refrigerated Air Dryer be specified to be used in conjunction with the 20 HP Air Compressor. This Item was provided for the X-Ray Wharf BOWTS Plant. It is important to have clean dry compressed air for this plant proper operation.

A79: Deferred

Q80: BOWTS Plant – Reference RFP Part B, Specification Section 40 42 60.20 Bilge and Oily Waste Treatment System, Paragraph 2.7 Sludge Dewatering System, and RFP Part C, Drawing Nos. M-101 (Bilge Oily Waste Treatment (BOWT) Equipment Plan) and M-002 (Mechanical Legend, Symbols, Abbreviations, and Bill of Materials):

In Specification 40 42 60.20, Paragraph 2.7 Sludge Dewatering System, indicates using a Screw Press with two (2) roll-a-way dumpsters, while the plans (Sheet M-101) and corresponding legend (Sheet M-

002) show using a Filter Press. Additionally, Item # 51 (20 ft3 Filter Press), Item #5 (Pre-Coat Mix Tank), and two (2) roll-a-way dumpsters are also noted. Does this mean that either a Screw Press or Filter Press can be utilized? Due to the type of waste and consistency of the byproduct, it is recommended that a Filter Press be used. See further information and questions on BOWTS Plant RFI (Question) 86.

A80: Deferred

Q81: BOWTS Plant – Reference RFP Part B, Specification Section 40 42 60.20, Bilge and Oily Waste Treatment System, Paragraph 1.6.2 Load Equalization Tank (LET) System, and RFP Part C, Drawing No.

M-301 (Bilge Oily Waste Treatment (BOWT) Sections):

Specification Section 40 42 60.20, Paragraph 1.6.2 and Sheet M-301 show and describe a chain and flight sludge collection and oil skimming mechanism. A chain and flight sludge collection and oil skimming mechanism is not recommended for the Load Equalization Tank System; mechanical shearing or emulsification of oils which would occur with the chain and flight device works against the removal of oil. The oil will be removed successfully via the two oil-water separators designed up and downstream of the DAF unit. By removing the chain and flight mechanisms, one set of oil pumps can be eliminated. Our position on the LET’s is that they should be utilized for equalization but not for clarification. It would be difficult to remove oils from the LET’s, for example, and the system we are providing will include Oil‐Water separators where the oil is easily handled. This is why we recommend designing the LET in such a way that the floatables come through to the BOWTS system – not get trapped in the LET. Also, there is no electrical loading indicated on the BOWTS – One Line Diagram on Sheet E-612 for either of these devices, 2 per each LET Tank.

A81: Deferred

Q82: BOWTS Plant – Reference RFP Part B, Specification Section 40 42 60.20, Bilge and Oily Waste Treatment System, Paragraphs 1.6.11.4 Sludge Pumps and 1.6.11.8 Sludge and Slop Oil Air Operated Diaphragm Pumps:

Sludge pumps at the Sludge Tank to pump to the dewatering system are mentioned in two paragraphs,

1.6.11.4 and 1.6.11.8. It appears that two manufacturers to be used for these differ depending on the paragraph. Please confirm if these are to be the same manufacturer as the bilge and oily waste transfer pumps.

A82: Deferred

Q83: BOWTS Plant – Reference RFP Part C, Drawing No. M-301 (Bilge Oily Waste Treatment (BOWT) Sections):

Sheet M-301, Section C3, the CMU Wall that sits atop the Concrete Containment Wall does not match the CMU wall height as shown on SB-301, SB-506 nor SB-508. Is the taller CMU Wall as indicated on the SB drawings correct and to be followed?

A83: Deferred

Q84: BOWTS Plant – Reference RFP Part C, Drawing No. E-612 (BOWTS - One Line Diagram):

On Sheet E-612, the Refrigerated Air Dryer appears to be missing. We suggest Item # 71 be added as the above mentioned dryer at 120 Volt-60 Hertz,-Single Phase, 3/4 HP Motor.

A84: Deferred

Q85: BOWTS Plant:

(a) Will Bilge Water/Oil be furnished for the operational Testing of this BOWTS Plant and will there be a charge for this Bilge Water/Oil? We assume it will be trucked from one of the other BOWTS Plants at Apra Harbor.

(b) If there will be a charge, how much money is estimated to be the cost for this Bilge Water/Oil and transportation?

A85: Deferred

Q86: BOWTS Plant – Reference RFP Part B, Specification Section 40 42 60.20, Bilge and Oily Waste Treatment System, Paragraph 1.6.10 Sludge Dewatering System:

Does the BOWTS Plant Operators have a preference for the Sludge Dewatering System to be utilized, either a Vertical Screw Press as indicated in the Specification 40 42 60.20s, Paragraph 1.6.10, or a Horizontal Filter Press as indicated on the Plans and Equipment Legend? Our concern is the pressate (screw press filtrate) water quality and the dryness of the cake on this application. Often a lot of bulking material (rice hulls, saw dust, clay, etc.) needs to be added as filter aid to prevent stuff from squeezing out from the discs on the screw press.