AMENDMENT NO 0005 W912P621R0003 LAKE GEORGE.pdf

W81G6603023956

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

REFERENCE: REQUEST FOR PROPOSALS (RFP) NO. W912P621R0003, LAKE GEORGE CANAL MIDDLE SECTION RESTORATION, LAKE

COUNTY, INDIANA

A. The Proposal Due Date and Time is unchanged by this Amendment. Therefore, proposals are due prior to 5:00 p.m. (Central Time) on July 30, 2021. -For further details regarding offer and evalutation information, please refer to Solictation Section 00 21 16 - Instructions to Proposers.

-- THIS AMENDMENT CONTINUES ON THE FOLLOWING PAGES --

1. CONTRACT ID CODE PAGE OF PAGES

1 30

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

16C. DATE SIGNED

BY 21-Jul-2021

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 W912P621R0003

X 9B. DATED (SEE ITEM 11)

11-Jun-2021

10B. DATED (SEE ITEM 13)

9A. AMENDMENT OF SOLICITATION NO.

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

X The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offer is extended, X is not extended.

Offer must acknowledge receipt of this amendment prior to the hour and date specified in the solicitation or as amended by one of the following methods:

(a) By completing Items 8 and 15, and returning 1 copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted;

or (c) By separate letter or telegram which includes a reference to the solicitation and amendment numbers. FAILURE OF YOUR ACKNOWLEDGMENT TO BE RECEIVED AT THE PLACE DESIGNATED FOR THE RECEIPT OF OFFERS PRIOR TO THE HOUR AND DATE SPECIFIED MAY RESULT IN

REJECTION OF YOUR OFFER. If by virtue of this amendment you desire to change an offer already submitted, such change may be made by telegram or letter, provided each telegram or letter makes reference to the solicitation and this amendment, and is received prior to the opening hour and date specified.

12. ACCOUNTING AND APPROPRIATION DATA (If required)

13. THIS ITEM APPLIES ONLY TO MODIFICATIONS OF CONTRACTS/ORDERS.

IT MODIFIES THE CONTRACT/ORDER NO. AS DESCRIBED IN ITEM 14.

A. THIS CHANGE ORDER IS ISSUED PURSUANT TO: (Specify authority) THE CHANGES SET FORTH IN ITEM 14 ARE MADE IN THE

CONTRACT ORDER NO. IN ITEM 10A.

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (such as changes in paying office, appropriation date, etc.) SET FORTH IN ITEM 14, PURSUANT TO THE AUTHORITY OF FAR 43.103(B).

C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY OF:

D. OTHER (Specify type of modification and authority)

E. IMPORTANT: Contractor is not, is required to sign this document and return copies to the issuing office.

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

10A. MOD. OF CONTRACT/ORDER NO.

2. AMENDMENT/MODIFICATION NO. 5. PROJECT NO.(If applicable)

6. ISSUED BY

3. EFFECTIVE DATE

21-Jul-2021

CODE

U.S. ARMY ENGINEER DISTRICT, CHICAGO

231 SOUTH LASALLE STREET SUITE 1500

CHICAGO IL 60604-1437

W912P6 7. ADMINISTERED BY (If other than item 6)

4. REQUISITION/PURCHASE REQ. NO.

CODE

See Item 6

FACILITY CODECODE

EMAIL:TEL:

W912P621R0003

SECTION SF 30 BLOCK 14 CONTINUATION PAGE

The following items are applicable to this modification:

SUMMARY OF CHANGES

B. REVISED BID SCHEDULE: The government is providing a revised bid schedule (Section 00 10 00 – Solicitation Contract Form), which modifies Item no. 0008 (Additional Organoclay (Option)), sub-CLIN 0008AA – Initial lb from 300,000 lb to 1,130,000 lb and sub-CLIN 0008AB Over lb from 300,000 to 1,130,000 lb. In addition, CLIN (Free Product Recovery During Construction – Item no. 0001AB) is added to provide a unit measure pay item for floating oil recovery and disposal. As a result of this revision, Proposers shall remove and replace the previously issued respective Section with the Revised Section 00 10 00 enclosed hereunder. Proposers shall provide their prices on the Revised Pricing Schedule.

C. AMENDED SPECIFICATION SECTIONS: The following Specification Sections have been revised. The revised sections are enclosed hereunder and replace the previously furnished sections.

SECTION NUMBER AND TITLE PARAGRAPH AND DESCRIPTION OF CHANGE

00 10 00 – SOLICITATION Bid quantities were amended for ecosystem restoration acreages.

01 22 00.00 10 – PRICE AND PAYMENT

PROCEDURES

An additional CLIN (Free Product Recovery During Construction – Bid Item 0001AB) was added to provide a unit measure pay item for floating oil recovery and disposal. The existing CLIN (Oil Control During Construction – Bid Item 0001AA) will remain a lump sum pay item. The lump sum bid will be used to cover fixed, set-up, and oil boom related costs.

31 05 19 – WEST TANK FARM BANK CONTROL

SYSTEM

The requirement to construct the west tank farm in the dry was removed based on several concerns from potential bidders. Specifications were amended to require that the west tank farm be constructed in the dry where feasible and appropriate. USACE will evaluate bidder proposals for constructing and verifying the remedy in the wet as part of the Technical Evaluation Factor of the proposal.

This amendment also changes the Government response to previously answered inquiries regarding construction in the dry. The specification was also amended to include material properties for the geomembrane installed at the top of the west tank farm banks.

31 13 13 – SELECTIVE TREE AND SHRUB

CLEARING AND REMOVAL

The amendment clarifies that clearing and grubbing is required within the ecosystem restoration areas marked on the plans.

31 36 19 – POLYMERIC MARINE FILTER MATTRESS Additional changes were made to the specification to reflect commercially available products, including acceptable material type for the mattress and stone sizing.

35 14 50 – AQUATIC HABITAT The specification language was amended to clarify that the wetland shelf habitat substrate mixture will be proportioned by volume.

D. AMENDED DRAWING SHEETS: The following Drawing Sheets have been revised and are hereunder enclosed replacing the previously furnished respective sheets.

SHEET REF. NO. TITLE AND DESCRIPTION

G-004 Site Map – Scale bar was adjusted G-005 Site Access Map – Scale bar was adjusted

C-108 Plan and Profile Sta 17+00 – Note was added to describe type of vessels to utilize boat ramp after construction.

E. CONTRACTOR INQUIRIES: By this Amendment, the Chicago District, USACE responds to Contractor’s inquiries.

Inquiry 1: Drawing C-104: There are a significant number of operating utilities under and around the primary staging area. This area will likely be utilized by heavy machinery and a crane to place marine equipment into the water. Can the USACE provide soil bearing capacity or guidance for use of this area to ensure the protection of the underlying utilities.

USACE Response Inquiry 1: Available soil data is presented within the plans and specifications. The potential contractor should assume weak soils and bid accordingly. The winning contractor will coordinate directly with utility owners as necessary to protect infrastructure and utilities.

Inquiry 2: Drawing C-108: There are a significant number of operating utilities under the boat ramp area. This area will likely be utilized to construct the boat ramp. Can the USACE provide soil bearing capacity or guidance for use of this area to ensure the protection of the underlying utilities.

USACE Response Inquiry 2: Available soil data is presented within the plans and specifications. The potential contractor should assume weak soils and bid accordingly. The winning contractor will coordinate directly with utility owners as necessary to protect infrastructure and utilities.

Inquiry 3: Please provide elevations, details (depth, size, material, etc.), and as-builts for known underground utilities to assess how to perform the work above and around the utilities.

USACE Response Inquiry 3: All the utilities are shown on the drawings. No other data is available.

Contractor is required to complete the utility survey before the construction begins.

Inquiry 4: Drawing G-004: The scale appears to conflict with the channeling station. Please revise or provide direction.

USACE Response Inquiry 4: Scale was revised. See amended drawings.

Inquiry 5: Drawing G-005: The scale appears to be mislabeled. Please confirm that the scale is correct and that the “100” should be “200”.

USACE Response Inquiry 5: Scale was revised. See amended drawings.

Inquiry 6: Spec 31 41 16 subsection 3.2.2.2: Top of sheets will likely be driven to an elevation below the water level in the canal. Marking the sheets with a horizontal alignment line does not seem practical. Please detail how the sheet alignment and condition will be inspected and verified by USACE?

USACE Response Inquiry 6: Contractor is responsible for ensuring that the sheet pile wall is placed to meet the requirements and tolerances of the specification. USACE will review contractor driving records, quality assurance reports, and daily reports for approval. USACE may also conduct field investigation (for example, rod, survey, or other methods) for verifying alignment and elevation for approval.

Inquiry 7: Scale on drawing sheet G-004 shows 1" = 200'. It is more than likely 1" = 100'

USACE Response Inquiry 7: Scale was revised. See amended drawings.

Inquiry 8: Can you provide XYZ drawing data for existing elevations and cap placement areas and elevations?

USACE Response Inquiry 8: XYZ electronic data will be provided with the contract set. Contour lines and elevations are shown on the drawings. Contractor should bid accordingly.

Inquiry 9: Drawing Sheet C-108 shows 60'x15' Precast Boat Ramp. Please provide drawing details and specifications for the precast materials. Thickness, reinforcing, concrete requirements, etc?

USACE Response Inquiry 9: The boat ramp will be used by small survey boat. This note will be added to sheet C-108, The boat ramp shall be constructed to provide access for the small-medium motorboat.

Inquiry 10: Can you provide specification for CA-7 Stone shown on drawing C-108

USACE Response Inquiry 10: Follow IDOT standard specifications for properties of CA-7.

Inquiry 11: Could I please request further clarification regarding the specification of a 12in thick polymeric filter mattress? The specifications all appear to indicate a mattress made with Biaxial geogrid, and to my knowledge the industry standard is to manufacture this type of product in either 6in or 8in thick mattresses. To my knowledge they cannot be made 12in thick with this type of material. Can you please provide further clarification on this?

USACE Response Inquiry 11: Part 2.1.1 and the characteristics listed in Table 1 of specification SECTION 31 36 19 POLYMERIC MARINE FILTER MATTRESS were changed in a previous amendment to allow use of a uniaxial grid.

Inquiry 12: Also, the specifications for the Geotextile Clay Liner (GCL) appear clear, though is the specification for a geomembrane in addition to this liner, or perhaps they are deemed an interchangeable term in this specification/application? If they are separate, can further clarification on the requirements for the geomembrane be provided?

USACE Response Inquiry 12: An update has been made to specification section 31 00 00 to provide properties for the geomembrane for the west tank farm banks. The geomembrane and reactive matting are not interchangeable. The location of placement of both the reactive matting (Type I / Type II) and geomembrane are shown on the contract drawings.

Inquiry 13: Based on the water levels of the canal, the top of the sheeting wall could be as much as 12’ below the water surface. Due to the nature of the contamination in the water, we have concerns about trying to cut the sheets underwater. Per Section 31 41 16 – 3.2.2.1, the top of pile elevation needs to be within ½” horizontally and 1” vertically.

Can the tolerance for final sheet elevation be lessened to allow the sheets to be driven to final elevation from the water surface and eliminate the need for underwater cutting?

USACE Response Inquiry 13: Install sheet pile to the tolerances described in the specifications.

Inquiry 14: Detail C1 on drawing sheet S-101 shows a 8.50’ thick layer of displaced sediment with a 2.00’ thick cap layer on top of it on the west side of the new sheeting wall. The east side of the sediment wall it shows sediment elevation at 561.00’. Note on the same drawing this would be the “maximum thickness of displaced sediment anticipated after installation of the sediment cap.” Can you provide the rational for how 8.50’ of sediment will be accumulated under the cap?

USACE Response Inquiry 14: There is significant uncertainty in predicting how much sediment displacement will occur and how much will mobilize downstream to the wall location. The design conservatively assumes that the sediment will behave as flowable material where the capping materials will displace an equivalent volume of weak, potentially liquified sediment downstream towards the wall, reduced by a small amount of partial consolidation settlement from the stabilization layer. While the designer acknowledges this method most likely overpredicts the volume of sediment mobilization, the worst-case scenario was used to be protective of the environment by containing the sediment from flowing further downstream outside the project limits. The detail drawing on sheet S-101 illustrates the conditions designed for in determining top of the sheet pile elevation.

Inquiry 15. Specification Section 31 05 19 states that we are to “Construct the West Tank Farm back control system in the dry”. The depth of water from the bottom of the excavation cut to current waterline elevation is approximately 5’. This would be too deep to utilize a portadam or aquadam temporary dewatering system. Because of all of the utilities shown that are in the same work area as the excavation it will likely not feasible for use to drive temporary sheet piling in order to create a cofferdam. Because of the depth an earthen cofferdam is also likely not an option. Can the requirement that this work be performed in the dry be removed? If it cannot be removed can you provide direction on what methods you would like to be utilized to dewater the area?

USACE Response Inquiry 15: USACE has amended the contract to permit installation in the wet where installation in the dry is not feasible. Include quality control and verification methods for installation in the dry within respective portions of the Technical Approach and Management proposal documentation.

Inquiry 16: Can you clarify that per detail B3 and B6 on Sheet C-305 that there is to be two layers of Reactive Core mat with a oleophilic layer in-between those mats?

USACE Response Inquiry 16: There are two layers of organophilic clay reactive matting with one layer of oleophilic matting between those two mats.

Inquiry 17: Are there any utility locate requirements above and beyond utilizing one-call? Diver verification, depth of cover survey, Pipe or Cable Tracking, or other?

USACE Response Inquiry 17: Please see Specification Section 01 10 00, Paragraph 1.15; Specification Section 01 11 00, Paragraph 1.3, Specification Section 35 20 23.50, Paragraph 1.1, and other related requirements. In addition to contacting the one-call system, the contractor is responsible for identifying and protecting utilities using appropriate means and methods. USACE will review and approve of individual methods as part of respective work plan submittals.

Inquiry 18: What is the estimated volume of the new storm water control berm?

USACE Response Inquiry 18: Elevation of the existing ground and proposed contour lines are shown on C- 109 needed to compute the volumes.

Inquiry 19: If road improvements need to be made to bring in materials and equipment would those cost need to covered as part of this contract? Under what biditem should these costs be carried?

USACE Response Inquiry 19: See specification section 01 50 00 - Paragraph 2.2.1 - Haul Roads. Road improvements must be approved by property owner, as necessary. Include costs incidental to hauling and transportation within respective bid items.

Inquiry 20: Specification 35 20 23.50 Engineered Sediment Cap states that “The stabilization layer will be allowed to pre-consolidate for at least 90 days.” At this point USACE will determine if additionally organophilic clay is necessary above the 1.1 lbs/sf per the design; however, based observed performance of this design up 3 different loading rates. For scheduling and material ordering purposes how long after the 90 days will USACE inform the contractor of the revised loading rates? The organoclay suppliers indicate that there could be a 6-8 week lead time on additional organoclay needs.

USACE Response Inquiry 20: For the purposes of scheduling and material ordering, assume that the full review period (30-days) will be utilized for review of the Pre-Consolidation Inspection Report in order for USACE to evaluate additional organophilic clay needs. USACE will expedite review and option award to the maximum extent possible. Close coordination between the Contractor and USACE will be necessary to evaluate pre-consolidation results as data is available.

Inquiry 21: Specification 35 20 23.50 Engineered Sediment Cap states that “Up to three different organophilic clay loading rates may be necessary with the capping area.” The multiple loading rates will greatly affect the quality control on how the material is made, how it is placed , and how post construction conformance is confirmed. Will the areas with the different loading rates correlate to the pre-consolidation inspection areas or some other layout?

USACE Response Inquiry 21: Yes, it is expected that the loading rates will predominately correspond with the pre-consolidation inspection areas. The inspection areas will be approved and coordinated within the relevant plans and submittals.

Inquiry 22: Specification 01 22 00.00 Price and Payment has Maintenance and monitoring for 3 years for the Sediment Cap and West Tank Farm. Several specifications including 01 10 00 General Provisions, 01 11 00 Summary of Work, 31 05 19 West Tank Farm Bank Control, and 35 20 23.50 Engineered Sediment Cap, all specify that all work will be warrantied for a period of 5-years from COR acceptance of work. Is the contractor responsible for inspections for years 4 and 5 or will USACE perform these inspections per the specifications? If the contractor is to provide inspections/maintenance for years 4 and 5? If so, where are these costs to be included?

USACE Response Inquiry 22: USACE will perform post-acceptance warranty inspections, as necessary. The Contractor will monitor cap performance as part of the option item work, if awarded. Costs should be placed in the respective bid items, for example, see Specification Section 01 22 00.00 10 Paragraph 1.3.19 and previous specification amendment.

Inquiry 23: Specification 35 21 10 Oil Boom Installation and Maintenance states “The contractor is responsible for anticipating the volume of oi to be released;…” We have reviewed the reports provided in Specification 00 31 32.13 Subsurface Drilling and Sampling as directed, specifically Figure 2-6 Subsurface Sediment Samples (Tetra Tech) and the associated Table 3-2 for potential oil contamination in the sediments and Figure 6 LNAPL Characterization and Monitoring Well Data – West Tank Farm Area (Arcadis) for LNAPL in the West Tank Farm area. The first identifies oil contamination (DRO, GRO, etc.) found within 4 samples (unknown depth) of the sediment but not how much free oil is present. The second does identify the amount of LNAPL on the ground water but not the flow velocity that it is moving towards the canal. Based on this information it is difficult for a contractor to accurately determine how much oil will be encountered during operations. These quantities are currently part of a Lump Sum line item. Would USACE consider a unit price line item for handling waste oil?

USACE Response Inquiry 23: Yes, USACE has added a unit price line item for handling of waste oil. As noted in the revised specifications, the new line item (Free Product Recovery During Construction) should be utilized for recovery and disposal of liquid product/recoverable floating oil. The existing lump sum item (Oil Control During Construction) should be utilized for other costs related to oil control, such as oil adsorbent boom replacement and disposal.

Inquiry 24: It is our understanding the CLIN 0009 “wetland shelf cap” will be constructed per the specification Section 35 20 23.50 per the “Wetland Shelf Cover” in section iii. Is that correct?

USACE Response Inquiry 24: Yes, that is correct.

Inquiry 25: Can you clarify that the total thickness of the wetland shelf cap consists of three distinct layers; 12” Stabilization, 6” Sand Amended with organophilic clay and a 13” vegetated biologically active layer for a total thickness of 31”?

USACE Response Inquiry 25: Response: Yes, that is correct. The wetland shelf cap is similar to the sediment cap, except the surficial 3-inches changes in composition.

Inquiry 26: The typical section D1 on sheet C-307 shows a 12” stabilization layer, 6” amended layer and 10” sand benthic isolation layer below the wetland shelf cap. Are these layers in addition to the 31” wetland shelf for a total of 59” or is the benthic isolation layer being replaced by the wetland shelf cap? Please clarify cross section in this area.

USACE Response Inquiry 26: The cross-section of the cap is represented by the D1 detail on sheet C-307.

There is a 12-inch stabilization layer, 6-inch amended layer, 10-inch sand isolation layer, and 3-inch surficial layer. The 3-inch surficial layer transitions from the engineered cap composition to the more organic mixture as it extends up the banks. The total thickness is 31".

Inquiry 27: Please clarify what layers of material are to be paid for under the CLIN 0009 Wetland Shelf Cap and what layers are paid under separate CLIN.

USACE Response Inquiry 27: All layers shown in the typical wetland shelf detail and described as the wetland shelf cap in the specifications will be paid by the wetland shelf cap CLIN.

Inquiry 28: On page two of the water qualification certification (page 482 of the solicitation manual) the description describes placement of 706,000 CY of clean fill for the wetland shelf creation. Is this correct?

USACE Response Inquiry 28: No, that is incorrect. The "706k" CY in the WQC appears to be an error.

USACE is coordinating with IDEM. Determine quantities based on the requirements of the plans and specifications.

Inquiry 29: The wetland shelf habitat substrate material specification (Section 35 14 50 page 5 Part 2 Section 2.1) describes the soil blend as 30% topsoil and 70% sand. Will this be calculated by weight or by volume?

USACE Response Inquiry 29: Provide topsoil and sand bland, proportioned at 30% topsoil and 70% sand by volume, that has a depth of 3-inches. Specifications have been amended.

Inquiry 30: Is it the owners intent that we excavate and dispose of material to compensate for installation of the wetland shelf cap or is all imported material being placed over existing soils.

USACE Response Inquiry 30: Except where excavation or debris removal is necessary -- as described in the specifications -- the intent is to install the wetland shelf over existing soils.

Inquiry 31: Are there any restrictions in the secondary staging area? For example are there any buried utilities or storage tanks that would limit our use of the entire area highlighted in the drawings? If so, can the owner please provide a detailed schematic of the area that highlights any potential restrictions?

USACE Response Inquiry 31: Known utilities are shown on the project plans. Per the requirements of Specification Section 01 50 00 Paragraph 3.5.4, Section 01 10 00 Paragraph 1.15, and others, the contractor will coordinate access requirements with the property owner.

Inquiry 32: I don’t see an Item for Tree, Shrub and Brush Clearing. Is this incidental to the contract?

USACE Response Inquiry 32: Yes, this is incidental to the respective feature of work.

Inquiry 33: If sufficient topsoil is not present in the seeding and planting areas will the owner grant a change order to import the material or is this incidental to the contract?

USACE Response Inquiry 33: Please see Specification Section 32 93 01, Paragraph 3.2. Notify USACE if there is concern about substrate prior to planting, including in areas where new substrate will not be placed.

Inquiry 34: If soil testing determines that the existing topsoil is not suitable for plant growth will additional payments be made by the owner to amend the existing topsoil?

USACE Response Inquiry 34: Please see Specification Section 32 93 01, Paragraph 3.2. Notify USACE if there is concern about substrate prior to planting, including in areas where new substrate will not be placed.

Inquiry 35: The specification 32 93 01 Page 9 Item 3.1.1 states: “In areas of regrading (bare soil), …. Remove all humps, rocks, hard soil clumps, roots and debris greater than 1 inch diameter” Is it the owners intention that all topsoil in the seeded and planted areas be mechanically screened prior to seeding and planting operations?

USACE Response Inquiry 35: As noted in Paragraph 3.1.1, the intent is to prepare the planting area for optimal germination/establishment of native species and so that the performance standards are met. The contractor may use appropriate means and methods for accomplishing the performance standards.

Inquiry 36: Some species availability may be difficult to secure according to nurseries that meet specifications. Can substitutions be made for unavailable species? Some (but not limited to) are the following: Bidens tripartita Cicuta maculata Epilobium coloratum Sium suave. Will the owner be open to substitutions in the event these species are not available or should the contractor consider contract growing the proposed plants even if this adds significant cost to the plant material?

USACE Response Inquiry 36: See Specification 32 93 01, paragraph 2.2.1 and 2.3.4, the contracting officer may approve variations in the mixtures or live material in writing prior to installation. USACE will evaluate variations based on plant availability, as necessary and appropriate.

Inquiry 37: Are SAV anchoring techniques besides bamboo skewers acceptable? Weighted cheese cloth has been determined to be successful and would ensure a greater degree of success given the inability of eel grass to regenerate from broken stems.

USACE Response Inquiry 37: No. The weighted cheese cloth has not been successful in recent SAV plantings in some projects. Therefore this techique was chosen after careful research of it's documented success in eelgrass restoration projects along the east coast.

Inquiry 38: Should SAV planting grids be fenced on top as well as on all 4 sides?

USACE Response Inquiry 38: Fencing is intended to protrude out and above the water surface with the goal of preventing herbivory from common carp. A submerged caged fence has the possibility of drowning entrapped diving birds.

Inquiry 39: Light penetration through water is known to be a primary limiting factor in the success of submerged aquatic vegetation establishment. Per the adaptive management strategy of this project, will water clarity, similar to water depths at time of planting, be taken into account? In other words if water clarity is such that light will not penetrate to 3 feet, zones could be adjusted depths where light penetration is sufficient?

USACE Response Inquiry 39: Yes, water clarity can be taken into account for the planting zones.

Inquiry 40: The detail on C-307 shows SAV at 573 to 575 feet and wetland shelf plants at 579 to 582 feet. Can you confirm that planting locations will ultimately be determined by hydrology as observed in the field?

USACE Response Inquiry 40: Yes, while the elevations are strictly tied to the substrate placement for each of the zones (wetland and SAV), the planting locations of SAV are determined by ideal field conditions observed.

Inquiry 41: Can you explain the reasoning for the checkerboard approach to planting the SAV?

USACE Response Inquiry 41: The logic behind the checkerboard approach for the planting grid is that this allows for greater establishment success with high density plots, room for successful plantings to expand/fill in the gaps and maximizes the spread of plantings throughout the SAV zone. Eelgrass has a higher likelihood of success in high density clusters and we want to establish SAV in the largest area possible. So instead of planting either low density plots throughout the entire SAV zone with a lower chance of success or planting high density plots throughout the entire SAV zone thus requiring more plants and costing more. The checkerboard approach was chosen to efficiently establish successful plantings, provide room for expansion, and provide coverage throughout the SAV zone.

Inquiry 42: I just heard from our ecologist that the wetland shelf seeding is missing from the CLIN schedule. Also, the plans reference a seed mix to be used in clearing area (forest mix) yet we do not see it in the specifications. We also have a question about the selective clearing. In addition to the fact that there is no CLIN for clearing can you provide a size class specification for removal? The current specification is unclear.

USACE Response Inquiry 42: All trees and shrubs, regardless of size, with the exception of those marked to remain should be removed as part of the selective clearing. The specifications have been updated to make this more clear.

Inquiry 43: If after completion of the subaqueous cap, oil and sheen is not adequately controlled with the cap, what liability does the contractor have if the cap was installed as per the design? See warrantee p 302. The sediment cap has been designed to meet the long-term remediation goal of 27 parts per million of total polyaromatic hydrocarbons in dry sediment for a cap life of 100-years. The contractor will install a sediment cap consistent with the remediation goals.(p304), aso

USACE Response Inquiry 43: Subaqueous cap design has been designed to meet the long-term remediation goal of 27 ppm PAHs in dry sediment for a cap life of 100-years. The amended layer was also designed to capture mobile NAPL and oil ebulition emanating from subsurface sediment to the maximum extent possible (e.g., as kinetically feasible with the organophilic clay cover). As described in Section 01 10 00 – Paragraph 1.30, the Contractor is responsible for providing warranty on workmanship and materials performance.

Contractor is not liable for design deficiencies.

Inquiry 44: Page 547 on 5yr warrantee on WTF Bank controls states “The contractor shall inspect the banks for evidence of oil seeps, damage to the marine mattresses, loss of erosion protection stone, and adequacy of the berm stormwater control features. The contractor shall make any necessary repairs during the warranty period.” Question:

If there is evidence of oil seeps but no evidence of damage, which indicates a higher oil flow than expected, what repairs would the contractor be responsible for?

USACE Response Inquiry 44: Per Paragraph 3.10 of Specification Section 31 05 19, if oil seeps are identified at the West Tank Farm, the Contractor shall notify the COR immediately. If oil seeps are noted, potential causes will be investigated. The contractor shall keep the bank remedy -- as designed and constructed -- in good working condition as part of the contract and options, as necessary.

Inquiry 45: See Specification Section 31 36 19, Paragraphs 3.4.1 and 3.4.2. Marine mattresses should be placed to achieve blanket coverage and a smooth continual top.

USACE Response Inquiry 45: See Specification Section 31 36 19, Paragraphs 3.4.1 and 3.4.2. Marine mattresses should be placed to achieve blanket coverage and a smooth continual top.

Inquiry 46: SECTION 35 20 23.50 para 3.2.3.G states that “Visually monitor the project area daily for evidence of NAPL seeps during the pre-consolidation period. If the pre-consolidation period occurs during periods when there is no site activity, is daily visual monitoring required?

USACE Response Inquiry 46: Yes, monitor daily during the pre-consolidation period.

Inquiry 47: Section 35 21 00 para 3.1.2: Water Quality Monitoring During Construction states “The contractor will provide a buoy with two turbidity monitors no more than 600-ft downstream of the capping area. The turbidity monitors will be located at 50% and 80% water depth. The contractor will monitor turbidity levels continuously, in real-time during in-water construction activities. If either buoy indicates that the baseline statistical value was exceeded by more than 50-NTU over a 60-minute average, the contractor shall take action to identify the cause and address the exceedance. Please clarify that a minimum of one buoy and two monitors are required and that two buoys are not required.

USACE Response Inquiry 47: Two turbidity monitors are required, one to be placed at 50% and one to be placed at 80% water depth. Both turbidity monitors may be affixed to a single buoy.

Inquiry 48: Section 35 21 00 para 3.1.1: With the potential changes in background turbidity due to seasonal variations and downstream boat activity, will the baseline turbidity level be allowed to change during the project after the start of in-water work?

USACE Response Inquiry 48: It is not expected that the background/baseline turbidity monitoring will be updated. The contractor may include considerations for seasonal variation, flow conditions, or other confounding factors as part of the baseline analysis to be approved by USACE within the Water Quality Monitoring and Control Plan submittal. As noted in Specification Section 35 21 00 Paragraph 3.1.2, the contractor will first identify the causes of any exceedance during construction.

Inquiry 49: Section 35 21 10 para 3.3 Inspection and Replacement states “Oil absorbents shall be replaced at least once a week, unless inspection indicates more frequent replacement is required.”. If sections of the oil boom are not saturated with oil, is complete replacement of all of the oil absorbent boom required to be replaced weekly?

USACE Response Inquiry 49: See previous amendment to specification, requirement for the minimum weekly adsorbent replacement may be waived by approval from the COR.

Inquiry 50: Based on the site data provided there is inadequate data to estimate the amount of oil that will be generated during the life of the project. During one of the sediment sampling events it was noted that the entire surface of the canal has had a floating oil layer. Based on the potential for a large quantity of oil and oil boon to be generated during the 5+ year duration of the project, would you consider changing Bid Item 0001, 0026, 0027 and 0028 to include a unit price for oil control.

USACE Response Inquiry 50: Yes, USACE has added a unit price line item for handling of waste oil during construction. As noted in the revised specifications, the new line item (Free Product Recovery During Construction) should be utilized for recovery and disposal of liquid product/recoverable floating oil. The existing lump sum item (Oil Control During Construction) should be utilized for other costs related to oil control, such as oil adsorbent boom replacement and disposal. USACE is not adding a unit price for floating oil removal during the option period at this time.

Inquiry 51: What are the requirements for worker safety training on this project? The project specs refer to the EM 385-1-1 Manual, but it is not clear who needs to have the HAZWOPER training. Please advise.

USACE Response Inquiry 51: Reference Specification Section 01 35 26, Paragraph 1.8 – Activity Hazard Analysis. The contractor must effectively identify anticipated hazards and personnel requirements. Follow the requirements of the specifications as well as applicable and appropriate laws and regulation when developing site specific safety plans and training needs.

F. POINT OF CONTACT: The Point of Contact for this Amendment is Ericka Hillard at ericka.d.hillard@usace.army.mil.

END OF AMENDMENT NO. 0005

(REVISED PRICING SCHEDULE AND REVISED SPECIFICATIONS AND DRAWINGS

FOLLOWS ON THE NEXT PAGES)

REVISED (VIA AMENDMENT NO. 0005)

Section 00 10 00 – Solicitation

ITEM NO SUPPLIES/SERVICES QUANTITY UNIT UNIT PRICE AMOUNT

Oil Control

FFP

The Contractor shall provide all labor, materials, and equipment to perform OIL CONTROL activities identified at the Sub-Line Item Level, "0001AA and 0001AB." The actual work to be performed is described under the aforementioned Sub-Items. In that regard, the Contractor’s pricing to perform the required services shall be provided therein Items 0001AA and 0001AB, wherein the sub-line items themselves identify the quantities required to perform said work.

PURCHASE REQUEST NUMBER: W81G6603023956

NET AMT

0001AA 1 Job Oil Control During Construction

FFP

0001AB 62,500 Gallon Free Product Recovery and Disposal

During Construction

West Tank Farm Soil and Debris Handling

FFP

and Disposal

The Contractor shall provide all labor, materials, and equipment to perform WEST TANK FARM SOIL AND DEBRIS HANDLING AND DISPOSAL activities identified at the Sub-Line Item Level, "0002AA and 0002AB." The actual work to be performed is described under the aforementioned Sub-Items. In that regard, the Contractor’s pricing to perform the required services shall be provided therein Items 0002AA and 0002AB, wherein the sub-line items themselves identify the quantities required to perform said work.

0002AA 375 Net Ton

(2,000

LB).

Initial 375 Tons

0002AB 95 Net Ton

Over 375 Tons

Sediment Capping Soil and Debris

FFP

Handling and Disposal

The Contractor shall provide all labor, materials, and equipment to perform

SEDIMENT CAPPING SOIL AND DEBRIS HANDLING AND DISPOSAL

activities identified at the Sub-Line Item Level, "0003AA and 0003AB." The actual work to be performed is described under the aforementioned Sub-Items. In that regard, the Contractor’s pricing to perform the required services shall be provided therein Items 0003AA and 0003AB, wherein the sub-line items themselves identify the quantities required to perform said work.

0003AA 145 Net Ton

Initial 145 Ton

0003AB 40 Net Ton

Over 145 Tons

0004 47,248 Square

Yard

Sediment Cap Type A

PSC CD: Y1KB

0005 2,045 Square

Sediment Cap Type B

0006 1 Job Environmental Controls During

FFP

Construction

0007 6,560 Square

Foot

Sheet Pile Wall

Additional Organoclay (Option)

FFP

The Contractor shall provide all labor, materials, and equipment to perform ADDITIONAL ORGANOCLAY (OPTION) activities identified at the Sub-Line Item Level, "0008AA and 0008AB." The actual work to be performed is described under the aforementioned Sub-Items. In that regard, the Contractor’s pricing to perform the required services shall be provided therein Items 0008AA and 0008AB, wherein the sub-line items themselves identify the quantities required to perform said work.

0008AA 1,130,000 Pound Initial 1,130,000 lb

0008AB 285,000 Pound Over 1,130,000 lb

0009 9,004 Square

Wetland Shelf Cap

0010 2,800 Net Ton

Boulders

0011 5,160 Net Ton

Cobble

0012 9,625 Each Wetland Plugs

0013 7,500 Each Aquatic Vegetation Plugs

0014 16,500 Each Upland Plugs

0015 3 Acre Upland Seeding

0016 5 Acre Planting and Establishment (Year 0)

0017 5 Acre Planting and Establishment (Year 1)

0018 5 Acre Planting and Establishment (Year 2)

0019 5 Acre Planting and Establishment (Year 3)

0020 20 Each Woody Structures

Organic Mixture Fill

FFP

The Contractor shall provide all labor, materials, and equipment to perform ORGANIC MIXTURE FILL activities identified at the Sub-Line Item Level, "0021AA and 0021AB." The actual work to be performed is described under the aforementioned Sub-Items. In that regard, the Contractor’s pricing to perform the required services shall be provided therein Items 0021AA and 0021AB, wherein the sub-line items themselves identify the quantities required to perform said work.

0021AA 145 Net Ton

Initial 145 Tons

0021AB 40 Net Ton

Over 145 Tons

0022 942 Square

Bank Remedy Type I

0023 223 Square

Bank Remedy Type II

0024 1 Job Berm Construction

0025 1 Lot Performance & Payment Bond (Base Work)

FFP

This item is for bond coverage, which is applicable to line items 0001 through

Payment for bond premiums will be in accordance with paragraph (a) of FAR Clause 52.232-5 (Payments under Fixed Price Construction Contracts).

Adjustment(s) to the line item will also be made for any revisions associated with contract price changes (re: FAR 52.228-15, Performance and Payment Bonds- Construction).

OPTION OPTION 1 WORK ITEMS

FFP

This is a Parent Line Item No. 0002, linking Sub-items 0026AA through 0026AC.

This Parent Line Item is integral and sets forth the OPTION 1 WORK ACTIVITIES contained at the Sub-Item level (0026AA through 0026AC), WHEREIN the Contractor shall provide its pricing.

0026AA 1 Years OPTION First Year Sediment Cap Maintenance and

FFP

Monitoring

0026AB 1 Years OPTION First Year West Tank Farm Maintenance

FFP

and Monitoring

0026AC 1 Lot

OPTION PAYMENT AND PERFORMANCE BONDS

FFP

This item is for bond coverage, which is applicable to line items 0026AA and

0026AB

Payment for bond premiums will be in accordance with paragraph (a) of FAR Clause 52.232-5 (Payments under Fixed Price Construction Contracts).

Adjustment(s) to the line item will also be made for any revisions associated with contract price changes (re: FAR 52.228-15, Performance and Payment Bonds-

OPTION OPTION 2 WORK ITEMS

FFP

This is a Parent Line Item No. 0003, linking Sub-items 0027AA through 0027AC.

This Parent Line Item is integral and sets forth the OPTION 2 WORK ACTIVITIES contained at the Sub-Item level (0027AA through 0027AC), 0027AA 1 Years OPTION Second Year Sediment Cap Maintenance and

FFP

0027AB 1 Years OPTION Second Year West Tank Farm Maintenance

FFP

and Monitoring

0027AC 1 Lot

OPTION PAYMENT & PERFORMANCE BOND (OPTION 2)

FFP

This item is for bond coverage, which is applicable to line items 0027AA through

0027AB

Payment for bond premiums will be in accordance with paragraph (a) of FAR Clause 52.232-5 (Payments under Fixed Price Construction Contracts).

Adjustment(s) to the line item will also be made for any revisions associated with contract price changes (re: FAR 52.228-15, Performance and Payment Bonds-

OPTION OPTION 3 WORK ITEMS

FFP

This is a Parent Line Item No. 0004, linking Sub-items 0028AA through 0028AC.

This Parent Line Item is integral and sets forth the OPTION 3 WORK ACTIVITIES contained at the Sub-Item level (0028AA through 0028AC), 0028AA 1 Years OPTION Third Year Sediment cap Maintenance and

FFP

0028AB 1 Years OPTION Third Year West Bank Tank Farm

FFP

Maintenance and Monitoring

0028AC 1 Lot

OPTION PAYMENT & PERFORFMANCE BOND (OPTION 3)

FFP

This item is for bond coverage, which is applicable to line items 0028AA through

0028AB

Payment for bond premiums will be in accordance with paragraph (a) of FAR Clause 52.232-5 (Payments under Fixed Price Construction Contracts).

Adjustment(s) to the line item will also be made for any revisions associated with contract price changes (re: FAR 52.228-15, Performance and Payment Bonds-

SUMMATION OF PROPOSED PRICING:

- THE CONTRACTOR SHALL ENSURE ITS PRICING SET FORTH BELOW IS ACCURATE

AND PROPERLY CALCULATED -

SUBTOTAL BASE WORK ITEMS (0001 THROUGH

0025):$________________________

SUBTOTAL OPTION 1 WORK ITEMS (0026AA THROUGH 0026AC):$_________________________

SUBTOTAL OPTION 2 WORK ITEMS (0027AA THROUGH 0027AC):$________________________

SUBTOTAL OPTION 3 WORK ITEMS (0028AA THROUGH 0028AC): $_________________________

OVERALL PROPOSED PRICE (TOTAL OF ALL

AFOREMENTIONED SUBTOTALS):$________________________

END OF REVISED PRICING SCHEDULE

SECTION 35 14 50

AQUATIC HABITAT

7/13

PART 1 GENERAL

This section provides aquatic habitat structures for the Lake George Canal as part of the USEPA's restoration efforts at the Grand Calumet River Area of Concern. The main objective of the aquatic habitat structures is to provide heterogeneity in terms of physical structure within a channelized and static reach of a canal; ultimately increasing species richness and abundance of macroinvertebrates and fishes in a self-sustaining manner.

Aquatic habitat structures include the installation of a wetland shelf, submerged aquatic vegetation (SAV) beds, cobble fields, boulder clusters, and vertical fish habitat structure created from woody debris. The Contractor must provide all labor, materials and equipment required or inferred from the plan documents and this specification to complete the work. Installation must take place within designated locations as indicated in the project drawings and within approved submittals using the appropriate methods as specified. The success of establishing functional habitat structure must be determined through inspection by the Contractor and the USACE, Chicago District. The Contractor is responsible for and must establish and maintain an effective management program to ensure that the aquatic structures become established according to the requirements contained herein and in paragraph ACCEPTANCE CRITERIA. The Contractor must designate one experienced Site Supervisor or Steward to oversee and direct the restoration process. Established performance criteria must be achieved in order for the Contractor to receive final acceptance.

1.1 SUBMITTALS

Government approval is required for submittals with a "G" designation.

When used, a designation following the "G" designation identifies the office that will review the submittal for the Government. Submittals marked with a * will also be reviewed by local sponsor. Submit in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

SD-01 Preconstruction Submittals

Instream Habitat Placement Plan and SAV Planting Plan; G, PL*

Adaptive Management Plan (Option); G, PL*

1.2 TOLERANCES

Cobble - The intention is that the work shall be built as the plan sheets detail. Placement within the work limits should be more of a random conglomeration than a structure with neatlines. It is permissible and encouraged to allow cobble placement to overlap with other substrates and habitat types (e.g boulder, sand, gravel, wetland shelf, etc.) Payment shall not be made for excess material which the Contracting Officer permits to remain in place.

Woody Debris - The intention is that the work shall be built as the plan sheets detail. Placement within the work limits should be more of a random

Ben O'Neil Text Box W912P6-21-R-0003 Amendment #0005 disbursement of large and small woody debris alike, than a structure with neatlines. Woody debris placement is intended to overlap varied substrates and habitat types (e.g. cobble, sand, gravel, wetland shelf, etc). It is permissible and encouraged to allow woody debris to protrude from the water surface in shallow areas. Payment shall not be made for excess material which the Contracting Officer permits to remain in place

1.3 TERMINOLOGY

1.3.1 Fluvial/Glacial Stone

Any smoothly rounded, or semi-angular stone that is produced by the action of moving glaciers or flow rivers (boulders, cobbles, gravel). This does not include quarried limestone, also known as shot-rock or riprap.

1.3.2 Cobble

Cobble is defined here as a natural glacial stone that has soft, rounded edges as opposed to sharp, angular edges. Cobbles are normally procured through a vendor that harvests them from glacial deposits or from active riverine floodplains in an environmental sound manner. Cobble gradations have a minimum size of 3 inches in diameter and a maximum top size of 8 inches in diameter.

1.3.3 Gravel

Gravel is defined here as a fine gravel that has soft, rounded edges as opposed to sharp, angular edges. Gravel gradations have a particle size ranging from 4.76 mm to 19.1mm or sieve size #4 to ¾ inches. The use of crushed stone is not acceptable.

1.3.4 Woody Debris

Woody debris is defined as tree trunks, major limbs, and minor branches.

Trunks less than 6 inches in diameter or greater than 16 inches in diameter and leaves shall not be used. Hardwoods (e.g. oaks, maples, birch etc) shall not be used, with the exception of cottonwood. Woody debris for this project shall be procured from on-site tree removal. Woody debris size in diameter DBH shall be tagged and selected for use by the COR. The purpose is to provide natural heterogeneous vertical habitat with interstitial branch spaces for insects and fishes. Do not use woody debris contaminated with soil, or woody debris that was previously buried (e.g., root wads).

1.3.5 Submerged Aquatic Vegetation

Submerged aquatic vegetation (SAV) is defined as the freshwater plant, Vallisneria americana, commonly called wild celery, water-celery, or eelgrass that grows underwater in the shallows. SAV shall consist of live shoots with horizontal rhizomes and contains no invasive or nonnatives species.

1.4 REFERENCES

ASTM INTERNATIONAL (ASTM)

Ben O'Neil Text Box

ASTM D4972 (2018) Standard Test Methods for pH of Soils

U.S. DEPARTMENT OF AGRICULTURE (USDA)

DOA SSIR 42 (1996) Soil Survey Investigation Report No. 42, Soil Survey Laboratory Methods Manual, Version 3.0

PART 2 PRODUCTS

2.1 Wetland shelf habitat substrate

The wetland shelf habitat substrate shall be comprised of a topsoil and sand blend, proportioned at 30% topsoil and 70% sand by volume, that has a depth of 3 inches. The topsoil should contain approximately 5 to 10% organic matter by mass and have a composition similar to that of loam with a pH between 5.5 and 7.0. The sand will be the same sourced sand used for the sediment cap.