W9127N20B0001 Amendment 0001.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

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

-Update Section 01 22 00.00 82, Paragraph 3.1.2 Dredging and Placement of Materials; Bradford Island Fish Ladder Exit, CLIN 0002

-Update Section 35 20 23.00 82, Paragraph 2.1 Character of Materials

-Add Attachment A16 - Dredged Material Evaluation History and Suitability Determination.

1. CONTRACT ID CODE PAGE OF PAGES

J 1 2

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

16C. DATE SIGNED

BY 19-Feb-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 W9127N20B0001

X 9B. DATED (SEE ITEM 11)

31-Jan-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, 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

19-Feb-2020

CODE

USACE PORTLAND DISTRICT

333 SW 1ST AVE

PORTLAND OR 97204-3440

W9127N 7. ADMINISTERED BY (If other than item 6)

4. REQUISITION/PURCHASE REQ. NO.

CODE

See Item 6

FACILITY CODECODE

EMAIL:TEL:

W9127N20B0001

SECTION SF 30 BLOCK 14 CONTINUATION PAGE

SUMMARY OF CHANGES

(End of Summary of Changes)

SECTION 01 22 00.00 82

MEASUREMENT AND PAYMENT

PART 1 GENERAL

1.1 REFERENCES

The publication listed below forms a part of this specification to the extent referenced. The publication is referred to in the text by basic designation only.

U.S. ARMY CORPS OF ENGINEERS (USACE)

EM-1110-2-1003 (November 2013 Edition) Hydrographic Surveying

1.2 GENERAL INFORMATION

In each instance the Contract price for an item will constitute full compensation in accordance with Contract Clause 252.236-7008, CONTRACT PRICES - BIDDING SCHEDULES. The Contract price and payment will also constitute full compensation for all work incidental to completion of the item, unless such work is otherwise specifically mentioned for separate payment under another bid item. In the event any work is required by the specifications Sections or by the drawings and not specifically mentioned in the measurement and payment paragraphs, separate and direct payment will not be made and all costs thereof are incidental to and included in the Contract prices and payments for all Contract Line Item Numbers (CLIN) listed in the price schedule.

1.3 UNIT PRICE PAYMENT ITEMS

Payment items for the work of this Contract on which the Contract unit price payments will be made are listed in Section 00 10 00, PRICE SCHEDULE, and described below. The unit price and payment made for each item listed will constitute full compensation for furnishing all plant, labor, materials, and equipment; performing all associated Contractor quality control, environmental protection, commissioning, preparation of as-builts, O&M manuals, tests and reports, meeting safety requirements; and for performing all work required for each of the unit price items.

1.4 JOB PAYMENT ITEMS

Payment items for the work of this Contract for which Contract job payments will be made are listed in Section 00 10 00, PRICE SCHEDULE, and described below. Include all costs for items of work, which are not specifically mentioned to be included in a particular job item, in the listed job item most closely associated with the work involved. The job price and payment made for each item listed will constitute full compensation for furnishing all plant, labor, materials, and equipment; performing all associated Contractor quality control, environmental protection, tests and reports, meeting safety requirements; and for performing all work required for which separate payment is not otherwise provided. Provide a schedule of values for job items prior to the start of work and submit an updated schedule

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with each payment request.

1.5 APPLICABLE REGULATIONS

1.5.1 Variations In Estimated Quantities (Dredging)

a. Where the quantity of a pay item in this Contract is an estimated quantity and where the actual quantity of material within the required dredging prism varies more than 15 percent above or below the stated estimated quantity within the required dredging prism, an equitable adjustment in the Contract unit price will be made upon demand of either party. The equitable adjustment will be based upon any increase or decrease in costs due solely to the variations above 115 percent or below 85 percent of estimated quantity within the required dredging prism.

b. If the quantity variation is such as to cause an increase in the time necessary for completion, the Contracting Officer will upon receipt of written request for an extension of time within five days from the beginning of such delay, or within such further period of time which may be granted by the Contracting Officer prior to the date of final settlement of the Contract, ascertain the facts and makes such adjustment for extending the completion date as in his or her judgment the findings justify.

PART 2 PRODUCTS - NOT USED

PART 3 EXECUTION

3.1 MEASUREMENT AND PAYMENT

3.1.1 Mobilization and Demobilization, CLIN 0001

a. Measurement and payment for Mobilization and Demobilization will be considered complete and full compensation for the effort and cost to prepare the Contractor's plant and equipment for shipment; transport to and from the job site all necessary Contractor plant including related equipment, fuel, supplies, personnel required for its operation, and Government field office setup and on-board accommodations as stated in Section 35 20 23.00 82, DREDGING AND CHANNEL CLEARING, and Section

01 10 10.00 82, CONTRACTOR'S OPERATIONS AND REQUIREMENTS (DREDGING);

making ready for dredging; and maintaining plant and equipment in working condition at the site during the dredging period, and will be paid for at the Contract job price for this item. Plant subject to pre-work safety inspection requirements will not be considered "mobilized" until such equipment is determined to be in compliance as determined by the floating plant inspection and verified during the joint equipment walk-through.

3.1.2 Dredging of Materials; Bradford Island Fishladder Exit, CLIN 0002

a. Measurement and payment for the bid items referenced in the title above will be considered complete and full compensation for the effort and cost to excavate the entire dredging pay areas to not less than the "required dredging depth" as shown on the drawings, including water quality monitoring and placement of all dredged material within a suitable the designated disposal site that can accept hazardous

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material, and will be paid at the unit price (cubic yard of dredged material) for this item.

b. The Government will determine cubic yard quantities for payment by taking pre-dredge and post-dredge surveys utilizing electronic depth sounding and horizontal positioning equipment. See paragraph QUANTITY SURVEYS for measurement description.

3.2 PAYMENT METHOD

3.2.1 Pre/Post Dredge Survey

a. In Pre/Post Dredge Survey work areas, the Government will provide a required channel depth, with a maximum pay depth of one foot beyond the required channel depth, unless otherwise noted on the associated Contact drawings.

b. The dredging pay prism is formed by the maximum pay depth, and the horizontal dredging area limits. Request post-dredge Government hydrographic surveys in accordance with this Section. A work area will be accepted when all of the survey values inside the channel limits are equal to or deeper than the required channel depth.

3.2.2 Quantity Surveys

a. The Government will determine cubic yard quantities for payment and acceptance by utilizing electronic depth sounding and horizontal positioning equipment. Sounding depths used for determination of pay quantity volumes will generally be derived from surveys utilizing 208 kHz multi-beam acoustic methods. However, the Government reserves the right to take soundings by any method, including: leadline or trigonometric leveling (total station)/differential leveling. The same method will be used for the pre and post survey of a given reach.

b. The dredging pay area is defined by the intersection of the maximum dredging pay depth as shown by the Descriptive Sketch in Attachment [A]. The number of cubic yards calculated as being payable will be the difference between the most recent pre-dredge and post-dredge surveys of the dredging pay area or applicable acceptance area. Any material removed from outside the maximum dredging prism will not be considered for payment.

c. Accuracy(ies) will be in accordance with stated quality control values in EM-1110-2-1003. Upon request, the Government will provide the survey line files by which surveys are run.

d. Government Equipment: The following survey equipment (or comparable) will be used by the Government Survey Crew during the collection of sounding data and will be considered the standard for which data is obtained:

Positioning: Applanix Wavemaster or Applanix POS MV 4 Multibeam: RESON T-50 MB Singlebeam: ODOM CV100 ECHOSOUNDER with an 3 degree 200khz transducer AML Velocity Probe AML Sound Velocity Profiler

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Note: The Government will be available by request to run side-by side survey checks between the Contractor's and Government's survey vessels prior to the start of work. The Contractor must request any side-by-side survey checks at least seven days in advance of the desired date.

e. Cubic yard volumes will be computed by comparing the Government's pre-dredge and post-dredge soundings against the advanced channel design template. The Government intends to use Hypack software to compute pay volumes using the Triangulated Irregular Network (TIN) surface volume computation method. Computed pay volumes will be the difference between the TIN to CHANNEL computation of the post-dredge survey, and the TIN to CHANNEL computation of the pre-dredge survey.

No adjustments will be made for infill material (Y1) from any cause.

See Section 35 20 23.00 82, DREDGING AND CHANNEL CLEARING, regarding estimation of non-payable material.

f. All Contractor owned equipment including all attendant plant and anchor lines must be removed from the acceptance area prior to the initiation of a Government survey. If equipment remains in the acceptance area at the time of survey; the survey will be cancelled and the full daily rate for a Government survey crew shown in paragraph QUANITITY SURVEYS, below will be charged.

h. For all Contractor surveys:

(1) Conduct all surveys in accordance with EM-1110-2-1003.

(2) furnish the originals of all field notes, sounding plots, and electronic survey data described in Section 01 45 00.00 82, QUALITY CONTROL (DREDGING), along with all other records relating to the survey or to the layout of the work, to the Government, who may consider them to the extent necessary to determine the amount of progress payments.

(3) Retain copies of all such material furnished to the Government.

(4) Notify the GQAR in advance of any surveys conducted and the GQAR will have the option of attending these surveys.

i. The typical cross sections shown on the Contract drawing(s) represent the anticipated pre-dredge condition prior to start of work and are not necessarily derived from the latest available survey data.

j. Survey Time Frames

(1) All requests for Government surveys must be made by submission of a Hydrographic Survey Request Template (Attachment A7). The request must be submitted to the Government representative(s) identified at the pre-construction conference. The dredge, including all attendant plant and anchor lines must be clear of the acceptance area(s) before a survey is made. The Government Survey periods stated below are contingent on weather and sea conditions.

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(2) All survey requests must be submitted a minimum of three calendar days prior to the date on which the survey is required .

(3) The Government will perform all post dredge surveys within five calendar days of the requested date and will provide acceptance or rejection of each area within one day following the survey. The complete layout or post dredge package (i.e.

electronic survey data, layout chart, quantity computations) will be available two calendar days thereafter.

(4) Remain onsite until the post-dredge survey indicates the required / acceptable depths have been reached and the Government has accepted each area. In the event that the Contractor departs a work area prior to receiving final acceptance and the Government does not accept the work and requires cleanup dredging, all costs associated with the subsequent remobilization(s) to and from the unaccepted work area will be the responsibility of the Contractor

(5) The Government may conduct periodic progress surveys at all work locations. Notify the GQAR in advance of any surveys conducted and the GQAR will have the option of attending these surveys. Conduct all surveys in accordance with EM-1110-2-1003.

k. Request in writing for additional information for each survey, to include:

(1) Daily Report of Hydrographic Survey Operations

(2) Metadata

(3) Type of Survey: Multi- or Single-Beam

(4) Bar Check Calibration

(5) Sound Velocity Profile Report

(6) Survey Tide File Log

(7) Lead Line Report (when applicable)

(8) Copy of Field Book (scanned)

(9) Computation Report: The computation report will indicate the surveys used (identified by location and date) and the program and computation method used.

m. In the event it becomes necessary to reschedule a request for survey, notify the Government at least one calendar day prior to the first day of the scheduled survey period. Failure to provide such notification will result in a charge of one-half the daily rate for a Government survey crew as stated in Subpart 3.3.2(n). If the survey party mobilizes to the site before the survey is cancelled, the full daily rate for a Government survey crew will be charged.

n. Should more than one sounding or sweeping operation by the Government over an area be necessary by reason of work for the removal of shoals disclosed at a prior sounding or sweeping, the cost of such

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second and any subsequent sounding or sweeping operation will be charged at the rate of $3,500 per day for each day in which the Government plant is engaged in sounding or sweeping and/or is enroute to or from the site or held at or near the said site for such operations.

o. The most recent hydrographic surveys performed by the Portland District may be obtained at the following link:

http://www.nwp.usace.army.mil/Missions/Navigation.aspx.

-- End of Section --

01 22 00.00 82-6 AMD #0001

SECTION 35 20 23.00 82

DREDGING AND CHANNEL CLEARING

PART 1 GENERAL

1.1 GENERAL INFORMATION

This Section covers furnishing suitable floating clamshell dredging plant and performing all work to remove the specified materials from within the dredging pay area limits as indicated and placement of the dredge material within the material placement sites, as shown or specified. All equipment must meet all applicable U.S. Coast Guard regulations.

1.2 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

OREGON DEPARTMENT OF ENVIRONMENTAL QUALITY (ODEQ)

OAR 340-041-0205 Water Quality Standards Not to be Exceeded

1.3 OBSTRUCTIONS

Anchors, cables, and and other equipment that may be hazardous to navigation must be adequately marked with lights, signs, and buoys as necessary to prevent accidental contact by vessels in the area. Do not obstruct navigational traffic by the deployment of anchor systems that may pose a threat to safe passage as determined by the onsite Government representative.

PART 2 PRODUCTS

2.1 CHARACTER OF MATERIALS

Snags, logs, rocks, gravel, boulders, swifter wire, commercial fishing gear, discarded boat hardware, and miscellaneous debris may be encountered in the dredge areas. The Bradford Island Fishladder Exit materials consist primarily of coarse sand, silt, cobble and rock averaging one to two feet in diameter. It is anticipated the Contractor will encounter a limited amount of large boulders. The dredge must have the capacity to remove boulders in the four to five foot range. In general, the predominant material to be dredged is poorly graded Columbia River sand.

a. Snags, logs, rocks, gravel, boulders, swifter wire, commercial fishing gear, discarded boat hardware, and miscellaneous debris may be encountered in the dredge areas. It is anticipated the Contractor will encounter a limited amount of large boulders. In general, the predominant material to be dredged is poorly graded Columbia River sand The Bradford Island Fish Ladder Exit materials consist primarily of coarse sand, silt, cobble and rock averaging one to two feet in diameter.

b. Mercury concentrations are determined to be elevated above regional

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sediment quality guidelines per the 2018 Sediment Evaluation Framework for the Pacific Northwest [SEF] and not suitable for aquatic release (see Attachment A16). All dredged material must be tested and disposed of in a suitable site in accordance with all federal, state and local laws and regulations.

PART 3 EXECUTION

3.1 DREDGING

3.1.1 General

a. Provide sufficient size tug(s) to ensure safe transit of material placement plant and dredge plant. Submit the name and size of tugs, and licenses of the operators prior to the start of work.

b. Dredge all pay areas along the alignment and to the dimensions shown. Vertical control at Bonneville is NGVD29. To assure maintenance to the required dredging depth, payment will be allowed for material actually removed from between the required dredging depth and the maximum payable depth, as shown. Material removed from below the maximum payable depth or outside the pay area limits will be considered excess and will not be paid for.

c. In all areas paid by pre- and post-dredge survey; clear the dredging design width to the required dredging depth. Payment will be as described in Section 01 22 00.00 82, MEASUREMENT AND PAYMENT. Material on the side slopes will not be required to be removed for acceptance.

d. No redistribution of material by dragging a beam (or other method) to achieve final grade will be allowed under this Contract. All material specified to be dredged must be removed by dredging with a clamshell dredge.

3.1.2 Maximum Dredging Depth

Perform maintenance dredging at all locations. Layout charts will be provided after the Government completes a pre-dredge survey. Direction will be given to dredge a specific quantity to the required dredging depth as indicated on the drawings.

3.1.3 In-fill Areas

In-fill at all project locations should be expected. Necessity of cleanup cuts near the edge of the channel should be expected.

3.1.4 Rock in Dredging Prism

If grade cannot be reached in areas where rock is encountered, immediately notify the GQAR, and the coordinates of the area are to be documented in the daily CQC report. In areas where rock is encountered, dig to refusal.

The specific areas documented in the daily QC report will be compared with the post dredge survey in order to determine whether re-dredging an area will be required, if the area is not found to grade.

3.1.5 Equipment

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Perform all work under this Contract using a floating clamshell dredge and a bottom dump scow(s) or flat deck barge fitted with a positive means of retaining material. The tug must be twin screw, with a minimum of 1200 horsepower, or of sufficient power to make headway in a max flood or ebb.

In the event the fully loaded scow can't be controlled, a replacement boat or an assist boat will be required. The tug must have a good field of vision beyond the scow, when the scow is being pushed ahead. In the event the scow obstructs the vision of the tug operator, an experienced deckhand must be stationed as a lookout and that lookout must be in constant radio communication with the tug operator. All barges or scows used to transport material must be bottom dump, split hull, or a flat deck barge and in good working condition to prevent any loss of material during loading and transporting of dredged material. Contractor personnel are not be permitted on-board scows during transit to or from the material placement sites during the actual placement operation. The technique of "sandbagging" bottom dump seals is acceptable providing that all such sandbagging materials are of organic composition and are fully biodegradable. Failure to comply with the above conditions will be cause to require the replacement of such equipment with floating plant that can meet the requirements.

3.1.6 Layout of Work

Layout charts will be provided for all dredging areas based on the schedule of work and the hydrosurvey requests. The most current hydrosurvey information will be displayed on the dredging layout charts. Other pertinent information to be included with each layout package will be coordinated for the material placement site, supplemental tide gauge information, horizontal control locations, and computed quantities.

Government hydrographic survey personnel may be available during their normal working hours to assist in locating various short control points and tidal gauges.

3.2 PLACEMENT OF EXCAVATED MATERIAL

3.2.1 Disposal of Material

Place all dredged material from the Bradford Island Fish Ladder Exit within a landfill in accordance with all applicable Federal, State, and local regulations. Disposal plans must be submitted and approved within the PSMP.

3.2.2 Additional Requirements

a. Contractor personnel will not be permitted on-board scows during transit to or from the material placement areas or during the actual placement operation.

b. All scows used to transport material must be in good working condition to prevent any loss of material during loading, transporting, or removal.

3.2.3 Miscellaneous Trash and Debris

All logs, snags, trash, and debris removed from the designated channel will become the property of the Contractor and must be disposed of in accordance with all applicable Federal, State, and municipal laws and regulations.

Logs, snags, trash, and debris must not be placed in the Government

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furnished material placement sites.

3.2.4 Provisions for Emergency Discharges

There are provisions for emergency discharges to free a grounded vessel.

Any such action must be immediately reported to the Resident Engineer.

-- End of Section --

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CENWP-EC-HR (Sediment Quality Team) 28 January 2016

Memorandum for the Record: Bonneville Dam, Bradford Island Fish Ladder (BIFL) Exit Dredging Project dredged material evaluation history and suitability determination.

Project Description: The BIFL is located on Bradford Island and has two entrances directly downstream of the Bonneville Dam – one on the north side of the island and one on the south side. The north and south fish ladders merge into one fish ladder, transiting by the Bradford Island Visitor Center. The BIFL exits into the south forebay of the Bonneville Dam.

Sediment and debris create shoals at the BIFL exit, and periodic maintenance dredging is needed to keep the fish ladder exit open. In the past, dredge quantities have ranged from approximately 650 cubic yards (cy) to a maximum of 2,000 cy. The BIFL exit dredging proposed for 2016 is essentially the same as occurred in 2012.

Site History Information:

BIFL Exit Dredging History: In January/February 2002, approximately 1,600 cy of sediment and debris were dredged with a clamshell from the BIFL exit. Although the material was determined to be suitable for unconfined, aquatic disposal, it was placed on a barge and transported to the RABANCO Regional Disposal Company’s facility in Roosevelt Washington.

In February 2012, approximately 650 cy of sediment and debris were dredged with a clamshell dredge from the BIFL shoal, dewatered on Bradford Island in the upland, and transported by dump truck to an approved landfill.

1997 and 2001 BIFL Sampling Events: Sediment sampling prior to 2007 is summarized in the June 2007 “Sediment Sampling & Analysis Plan: Bonneville Dam, Bradford Island Fish Ladder” (SAP, Attachment A). The shoaling material at the BIFL was determined to be suitable for aquatic placement in 1997 and in 2001.

2007 BIFL Sampling Event: On 31 July 2007, the Sediment Quality Team collected 3 sediment samples to characterize a 2,000 cubic yard (cy) shoal adjacent to the Bradford Island Fish Ladder (BIFL). Four years later, the Sediment Quality Team summarized the sediment quality data in the July 2011 “Bonneville Bradford Island Fish Ladder Sediment Quality Evaluation Report” (SQER, Attachment B).

The SQER was submitted to the interagency Portland District Project Review Group (PRG; now known as the Portland Sediment Evaluation Team1) for evaluation per the Northwest Regional Sediment Evaluation Team’s (RSET’s) 2009 Sediment Evaluation Framework for the Pacific Northwest (SEF). The SEF is used by the PRG/PSET to evaluate the suitability of dredged material for unconfined, aquatic disposal, as required under the Clean Water Act section 404(b)(1) guidelines (see 33 CFR 230.60-230.61).

1 The PRG/PSET agencies include the Portland District (Lead), Environmental Protection Agency-Region 10 (Co- Lead), National Marine Fisheries Service, U.S. Fish and Wildlife Service, Washington Department of Ecology, and Oregon Department of Environmental Quality.

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The PRG compared sediment quality data presented in the SQER to the freshwater benthic toxicity screening levels (SLs) published in the RSET’s 2006 Interim Final SEF (freshwater SLs were not published in the 2009 SEF). Total mercury concentrations at the BIFL averaged 0.362 mg/kg (range 0.319 mg/kg to 0.402 mg/kg), exceeding the SEF screening level of 0.28 mg/kg.

On 29 July 2011, the PRG issued a negative suitability determination memorandum to the District stating that sediments in the 2,000 cy shoal were not suitable for unconfined, aquatic disposal (Attachment C).

PacifiCorp Condit Dam Removal Project: On 28 October 2011, the Condit Dam was breached by PacifiCorp to restore fish passage on the White Salmon River. The White Salmon R.

discharges into the Bonneville Pool at Underwood, WA (Columbia River Mile 168.3), approximately 23 miles upstream of Bonneville Dam. Sediments stored in Northwestern Lake were characterized prior to the dam removal; total mercury (Hg) concentrations ranged from

0.094 mg/kg to 0.881 mg/kg (average Hg conc. = 0.60 mg/kg) (Kleinfelder, 2008).

Between 1.6 and 2.2 million cy of Hg-contaminated, fine-grained sediment was discharged down the White Salmon R. into the Bonneville pool. Although sediment concentrations exceeded the 2006 Hg SL (0.28 mg/kg), the discharge was permitted, because the benefits of the stream and fish habitat restoration project outweighed the potential detrimental effects of releasing Hg-contaminated sediment into the system.

Kleinfelder et al. (2012) conducted one round of pre-dam removal sediment sampling (September 2011) and two rounds of post-dam removal sediment sampling (November 2011 and September 2012) were conducted at four locations on the Columbia River:

• On the Washington side of the Columbia R., across from Cascade Locks, OR, downstream of the White Salmon R.

• At the Wind R. confluence (Carson, WA), downstream of the White Salmon R.

• At the White Salmon R. confluence (Underwood, WA)

• At the Klickitat R. confluence (Lyle, WA), upstream of the White Salmon R.

Grain size analysis indicated that fine-grained sediment (silt + clay) was transported and deposited downstream of the White Salmon R. after the dam removal. Hg concentrations increased by 0.02 mg/kg at the Cascade Locks sampling location between September 2011 and September 2012 (from 0.07 mg/kg to 0.09 mg/kg). Hg concentrations at the Wind R. sampling location decreased slightly by 0.01 mg/kg (from 0.03 mg/kg to 0.02 mg/kg). These differences are not significant, because they are within the range of laboratory analytical variability. At the mouth of the White Salmon R., total Hg concentrations decreased by 0.08 mg/kg between September 2011 and September 2012 (from 0.98 mg/kg to 0.90 mg/kg).

Management Area Rank and Testing Frequency: Per the SEF, projects are assigned a management area rank based on risk of contamination in the project area. The PRG assigned a “moderate” rank to the BIFL exit dredging project based on the July 2007 SQER. Associated with the project rank is a sediment testing frequency: moderate-ranked projects must be re-characterized 5 years after the prior round of characterization (i.e., by July 2012) to support aquatic disposal of the dredged material.

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Discussion: In-situ sediment testing is not required to support dredging and upland placement of the BIFL exit shoal material. However, the receiving landfill will likely require a leachate analysis prior to accepting the material. If aquatic disposal of the dredged material is proposed in the future, then in-situ sediment characterization will be necessary prior to dredging. The District does not anticipate that water quality criteria will be exceeded during the dredging operation. A discussion of these concepts follows.

Dredged Material Suitability (Aquatic Disposal): The BIFL exit shoal material is not suitable for unconfined, aquatic disposal without additional characterization. Although the RSET’s updated Hg SL is 0.66 mg/kg, and the 2007 Hg concentrations measured in the BIFL shoal (0.319 mg/kg to

0.402 mg/kg) are less than the new SL, the 2007 data cannot be compared to the 2015 SLs to support aquatic placement of the BIFL exit shoal material because:

• The Condit Dam removal has changed conditions by contributing Hg-contaminated sediment to the system; additional sediment sampling would be needed to augment the 2007 data.

• Per the SEF management area rank and testing frequency guidelines, the July 2007 data have “expired;” additional sediment characterization would be necessary.

Dredged Material Suitability (Upland Disposal): Once a landfill has been identified, the project manager should coordinate with the landfill to determine the necessary testing requirements.

Based on past experience, the landfill will likely require a toxicity characteristic leachate procedure (TCLP) analysis for 8 heavy metals (arsenic, barium, cadmium, chromium, lead, mercury, selenium, and silver). Polychlorinated biphenyls were not identified as a chemical of concern in the last two rounds of characterization (2001 and 2007). However, due to the history of PCBs contamination at Bradford Island, a TCLP analysis may also be required for PCB Aroclors.

The dredging contractor can collect subsamples of dredged material during the dredging operation and submit a composite sample to an environmental laboratory for the TCLP analysis.

Hg and Water Quality in the Dredge Area: The 2009 SEF provides freshwater elutriate test triggers (ETs) for metals and some organic compounds. ETs provide an initial screening evaluation to determine if dredging would result in state water quality criteria being exceeded. If dredged sediment concentrations are below the ETs, then the dredged material is not expected to cause adverse water quality effects at the point of dredging. The Hg ET for freshwater sediment is 279 mg/kg. Total Hg concentrations in the project area sediments and the sediments released from behind Condit Dam are 3 to 4 orders of magnitude less than the freshwater Hg ET. The SEF freshwater ET calculations and ET tables appear in Attachment D.

Contact: Questions regarding this memorandum and its content can be addressed to James McMillan (PSET Lead; email: james.m.mcmillan@usace.army.mil; tel.: 503.808.4376).

References:

Kleinfelder; Ellis Ecological Services, Inc.; and JR Merit Industrial Contractors. 2012. “Condit

Hydroelectric Project Decommissioning (FERC Project No. 2342) – September 2012 Year 1 Sediment Sampling Report.” Prepared for PacifiCorp Energy (14 December).

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mailto:james.m.mcmillan@usace.army.mil

Kleinfelder, 2008. “Updated Evaluation of Mercury Bioaccumulation, Underwood In Lieu Fishing Access Site, Northwestern Lake, Condit Hydroelectric Project.” FERC Project No.

2342, White Salmon, Washington (4 December).

U.S. Army Corps of Engineers, U.S. Environmental Protection Agency, Washington

Department of Ecology, Washington Department of Natural Resources, Oregon Department of Environmental Quality, Idaho Department of Environmental Quality, National Marine Fisheries Service, and U.S. Fish and Wildlife Service. 2009. Sediment Evaluation Framework for the Pacific Northwest. Published May 2009, by the U.S. Army Corps of Engineers, Northwestern Division, 128 pp + Appendices.

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ATTACHMENT A

Sediment Sampling & Analysis Plan: Bonneville Dam, Bradford Island Fish Ladder

June 2007

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SEDIMENT

SAMPLING & ANALYSIS PLAN

BONNEVILLE DAM

BRADFORD ISLAND FISH LADDER

JUNE 2007

Prepared by:

Tim Sherman

Technical Review:

Mark Siipola

Portland District Corps of Engineers

CENWP-EC-HR

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Bradford Island Fish Ladder SAP 2007 ii

TABLE OF CONTENTS

TABLE OF FIGURES....................................................................................................... iii TABLE OF TABLES ........................................................................................................ iii ACRONYMS..................................................................................................................... iv

1. PROJECT OVERVIEW

1.1. Project Site Location and Description

1.2. Previous Sediment Sampling

1.3. Current Project Characteristics

2. PROJECT OBJECTIVES, PLANNING, AND LOCATION

2.1. Objectives

2.2. Planning Team and Responsibilities

2.3. Location

3. SAMPLING AND ANALYSIS REQUIREMENTS

3.1. Ranking

3.2. Sampling Requirements

3.3. Sampling Device

4. SAMPLE COLLECTION AND HANDLING PROCEDURES

4.1. Sampling Locations and Numbering

4.2. Field Sampling Schedule

4.3. Field Notes

4.4. Positioning

4.5. Decontamination

4.6. Core Logging

4.7. Field Compositing

4.8. Field Replicates

4.9. Sample Transport and Chain-of-Custody Procedures

5. LABORATORY PHYSICAL AND CHEMICAL SEDIMENT ANALYSIS

5.1. Laboratory Analyses Protocols

5.1.1. Chain of Custody

5.1.2. Limits of Detection

5.1.3. Sediment Chemistry

5.1.4. Sediment Conventionals

5.1.5. Holding Times

5.1.6. Quality Assurance/Quality Control

6. BIOLOGICAL TESTING

6.1. Bioassays

7. REPORTING

7.1. QA Report

7.2. Sediment Evaluation Report

APPENDIX A: PARAMETERS AND METHODS

APPENDIX B: QA2 DATA REQUIREMENTS

APPENDIX C:

RECOMMENDED ANALYTICAL AND QUANTITATION LIMITS

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TABLE OF FIGURES

Figure 1: Dredging Conceptual Site Model Figure 2: Vicinity Map of Bonneville Dam (Fish Ladder) Figure3: Proposed Sampling Station Locations

TABLE OF TABLES

Table 1: Planning Team and Responsibilities Table 2: Proposed Sampling Station Coordinates (NAD 83) Table 3: Sample Volume and Storage Table 4: Sediment Chemistry & Conventionals (See Section 5.1.3 & 5.1.4) Table 5: Minimum Laboratory QA/QC

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iv

ACRONYMS

Ag Silver As Arsenic Cd Cadmium CoC Contaminate of concern Cu Copper DEQ Oregon Department of Environmental Quality DMEF Dredge Material Evaluation Framework DQO Data Quality Objectives EPA Environmental Protection Agency Hg Hg MDL Method Detection Limit NES Newly Exposed Surface Ni Nickel PAH Polynuclear Aromatic Hydrocarbon Pb Lead PCB Polychlorinated Biphenyl QA/QC Quality Assurance/Quality Control SAP Sampling and Analysis Plan Sb Antimony SL Screening Levels TEL Threshold Effects Level TOC Total Organic Carbon USFWS U. S. Fish & Wildlife Service Zn Zinc

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1. PROJECT OVERVIEW

1.1. Project Site Location and Description

Bonneville Dam is located between River Mile (RM) 145 and 146 of the Columbia River. The proposed dredge site is located at the fish exit (water entrance) of the fish ladder east of the Bonneville Dam First Powerhouse on the south side of Bradford Island. Approximately 2000 CY or less will be dredged by clam shell. Pending a suitability determination, material will be placed in a dispersive flowlane area below the dam. If not determined suitable for in-water disposal, material will be placed in an approved upland disposal site.

1.2. Previous Sediment Sampling

In 1991 informational sampling and analysis was done on sediment downstream from the First Powerhouse Navigational Lock, on the south side of the river, with results acceptable for unconfined in-water or upland disposal. This same downstream area was dredged in1986 and in the late 1970s.

In July 1997 seven sediment samples were collected from Bonneville Second Powerhouse forebay and water supply conduits. Two of the samples were taken from the downstream portion of the south Auxiliary Water Supply (AWS) conduit by divers inspecting the inside of the south AWS. Three additional samples were taken from the surface of the sediment deposits at the north end of the forebay. The final two samples were collected from the sediment and woody debris removed from the north AWS intake trash rack by clamshell and stockpiled on Cascade Island, at the south end of the Elevation 90 Deck crane way extension. Physical analysis, run on four sediments, indicated the material ranges from gavel to very fine sand, with largest fractions in the coarse to medium sand range. Chemical analysis, run on five sediments, included metals, pesticides/polychlorobiphenyls (PCBs), polynuclear aromatic hydrocarbons (PAHs), total organic carbon (TOC), acid volatile sulfide (AVS), phenols and dioxin screen (P450). The portion of the sample submitted to the lab was representative of the material dredged, except for the woody debris. Results determined the material to be acceptable for unconfined in-water or upland disposal.

Beginning in May 2001 sediment samples were taken from an area at the Northeast end of Bradford Island, which contained high levels of PCBs from discarded electrical components discovered in the near shore area. Since the initial sampling event, several rounds of samples have been collected, both from in-water and upland areas. All discarded electrical components have been removed from the water. The investigation of this former dumpsite is still in progress.

Currently a sampling plan has been developed to further analyze sediments and both benthic and aquatic organisms.

In December 2001 three (3) sediment samples were collected from the fish ladder exit. The samples were collected using a ponar sampling device (a gravity core sampler was tried, but had only about 12” penetration). All samples were submitted for physical analyses including total volatile solids (TVS) and were analyzed for metals (9 inorganic), total organic carbon (TOC), A16-10 AMD #0001 pesticides and polychlorinated biphenyls (PCBs), phenols, phthalates, miscellaneous extractables, polynuclear aromatic hydrocarbons (PAHs) and organotin (TBT).

None of the laboratory data results exceeded their respective screening levels in the DMEF.

Levels of DDT and its derivatives (DDD & DDE) were found in all three of the samples at levels ranging from 6.39 to 6.78 ug/kg (ppb), but did not exceed the 6.9 ug/kg DMEF screening level.

All sediment is determined to be suitable for unconfined, in-water placement or suitable upland placement with return water without further characterization under guideline of the DMEF.

Although the 1577 CY of material dredged was determined to be suitable for unconfined in-water placement, it was determined, as a management option, to barge the material to RABANCO Regional Disposal Company's facility in Roosevelt Washington.

1.3. Current Project Characteristics

The current need for dredging is much the same as it was previously in 2001. Sediment has accumulated at the fish ladder (fish exit area) on the south side of Bradford Island, hampering the optimal function of the facility.

2. PROJECT OBJECTIVES, PLANNING, AND LOCATION

2.1. Objectives

• Characterize sediments in accordance with the regional dredge material testing manual protocols:

o Sediment Evaluation Framework (SEF), 2006.

o The Evaluation of Dredged Material Proposed for Disposal at Island, Nearshore, or

Upland Confined Disposal Facilities – Testing manual (Upland Testing Manual).

• Collect, handle and analyze representative sediment from Bradford Island Fish ladder exit (water entrance) in accordance with protocols and Quality Assurance/Quality Control (QA/QC) requirements.

• Characterize sediments to be dredged for evaluation of suitability of in-water disposal.

• Analyze for full suite of physical and chemical parameters as outlined in the SEF (2006).

SEF – Table 7.2 (Appendix C of this report) contains the list of analytes and methods of analysis. Organotin will not be considered an in-water contaminate of concern at the fish ladder; results from the 2001 sediment sampling event indicate it is not present above detection limits.

2.2. Planning Team and Responsibilities

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Table 1 lists the Project Team’s duties and responsibilities for the sediment-sampling project at Bradford Island Fish ladder.

Table 1: Planning Team and Responsibilities

2.3. Location

Table 2 lists the proposed sampling coordinates within the Bradford Island Fish ladder exit area.

Coordinates are based on the Lambert Projection for Oregon; North Zone (NAD 83, U.S. Survey Feet).

Table 2: Proposed Sampling Station Coordinates (NAD 83)

Sample Id Latitude Longitude

060507BIFL-P-01 45º 38.462’ 121º 56.572’

060507BIFL-P-02 45º 38.460’ 121º 56.539’

060507BIFL-P-03 45º 38.430’ 121º 56.528’

3. SAMPLING AND ANALYSIS REQUIREMENTS

3.1. Ranking

This area has not been ranked, but is in relatively close proximity to a contaminated site on the north side of Bradford Island. Although the 2001 sampling event showed that material suitable for in-water placement, additional sampling will be conducted.

Task/Responsibility

CENWP

Tim

Sherman

Columbia Analytical Services

CENWP

Personnel

CENWP

Mark Siipola

Overall Project Management X Sampling Plan Development X Agency Coordination X X Positioning/Log Record X X Sediment Sampling X X Physical Analysis X Chemical Analysis X X Final Report X Technical Review X Boat & Operator X

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3.2. Sampling Requirements

Sampling requirements depend on the type of sediment (heterogeneous or homogeneous), grain-size, organic content, the level of contamination (ranking in the SEF), depth of dredging prism and the need to characterize the new surface material after dredging. Three discrete samples will be collected and analyzed for PCBs. However, prior to analyses the 3 master samples will be split in the field. Procedure for splitting sample as follows: master sample will be mixed in clean stainless steel container, after mixing sample will be laid out on a clean surface and quartered. The 2 opposing quarters will be placed in one jar and the other 2 quarters in the jar to be archived (frozen) at the lab for possible future analyses. At the laboratory, sample to be analyzed should be mixed and placed on a clean surface and a pie shaped segment selected for analysis. This assures that settling during shipment and storage does not affect segment analyzed.

3.3. Sampling Device

A ponar sampler will be used to sample the sediment material. In the 2001 sampling event a gravity-core sample was attempted, with only 1-foot of penetration achieved it was not deemed necessary to attempt further gravity cores and a ponar was used to collect the additional 2 samples.

This effort will include the collection of three (3) samples at the fish exit of the ladder. The depth of the dredge prism is less than 3-feet and contains all infill material since the last dredging activity. Proposed sampling locations are shown in Figures 2 and station coordinates in Table 2.

Physical and chemical characterization analyses will be performed on all samples.

• Samples will be shipped to Columbia Analytical Services for analyses

• Turn-around-Time (TAT) will be standard 20 calendar days from laboratory receipt of samples

• Sample detection limits are those listed in SEF, 2006, Table 7.2 (see appendix C).

4. SAMPLE COLLECTION AND HANDLING PROCEDURES

4.1. Sampling Locations and Numbering

Figure 1 shows the project area vicinity map with approximate sample locations. Sampling sites are located for the best characterization of the material within the dredging prism as possible.

Proper QA/QC procedures as outlined in this section will be followed. Any deviation from these procedures shall be noted in the field log. Sample identification shall use the following convention:

060507BIFL-X-YY

where:

• 060507 denotes the sampling date (June 5, 2007).

• “BIFL” denotes samples collected from the Bradford Island Fish ladder.

• “X” denotes the type of sampling device (i.e. “P” for “Ponar”).

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• “YY” denotes the numeric sample sequence number. All samples will consist of two digits.

QC replicates (if collected) will have a letter designation in place of the numeric designation of the primary sample (i.e. 060507BIFL-X-A). Duplicate samples (if collected) will be identified in the field notes. Composite samples (if collected) will have a combined number in the “YY” designation (i.e. sample 02 and 03 will be 023, etc.).

4.2. Field Sampling Schedule

The Bradford Island Fish Ladder sampling event is schedule for July 31, 2007. This date is dependent on the ability to coordinate all required services prior to this date.

4.3. Field Notes

Field notes will be maintained during sampling and compositing operations. The following, as a minimum, will be included:

• Name of personnel(s) collecting and logging samples.

• Weather conditions.

• Date and time of collection of each sediment sample.

• Depth of each station sampled as measured from the water surface. This will be accomplished using a lead-line or corrected depth recorder.

• Sample station number and individual designation numbers assigned for each individual sample.

• Descriptions of sediment or core sections.

• Length and penetration depth of sampling device if sample is a core.

• Any deviation from the approved sampling plan.

4.4. Positioning

Sampling locations will be recorded in the field to the nearest 0.1 second. Coordinates are based on the Lambert Projection for Oregon – North Zone (NAD83, U.S. Survey feet). See Table 2 in Section 2.3 for coordinates of sampling points.

4.5. Decontamination

All sampling devices and utensils will be thoroughly cleaned prior to use as outlined below:

• Rinse with site water, to remove sediment.

• Wash with brush and Alconox soap.

• Rinse with distilled water.

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Utensils used to collect physical samples only or sampling devices such as the surface grab will be washed down before each sampling event. They will not, however, require the cleaning procedure outlined above as long as samples collected for chemical analyses are not in contact with core walls. All utensils used to collect chemical samples will require decontamination prior to each use. All hand work for chemical analyses will be conducted with disposable latex gloves and shall be rinsed with distilled water before and after handling each individual sample, as appropriate, to prevent sample contamination. Gloves will be disposed of between each sample or composite to prevent cross-contamination.

4.6. Core Logging

If used, each discrete core section will be inspected and described. For each core sample, the following data shall be recorded on the core log:

• Sample recovery.

• Physical soil description (including soil type, density/consistency of soil, and color),

• Odor (e.g. hydrogen sulfide, petroleum products, etc.).

• Visual stratification and lenses.

• Vegetation.

• Debris.

• Biological activity (e.g. detritus, shells, tubes, bioturbation, live/dead…