B.08W9127N19B0023Amendment1.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 modification is to amend Turbidity Monitoring tables in Attachment A10. The Attachment is replaced in w hole w ith this Amendment.

All other terms and conditions remain the same.

1. CONTRACT ID CODE PAGE OF PAGES

J 1 2

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

16C. DATE SIGNED

BY 11-Jun-2019

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 W9127N19B0023

X 9B. DATED (SEE ITEM 11)

07-Jun-2019

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

11-Jun-2019

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:

W9127N19B0023

SECTION SF 30 BLOCK 14 CONTINUATION PAGE

SUMMARY OF CHANGES

(End of Summary of Changes)

Water Quality Monitoring Plan Boat Basin Access Channel Critical Maintenance Dredging

2019 at Rogue River

This monitoring plan is to ensure compliance with the terms and conditions of the National Marine Fisheries Service’s (NMFS) May 25, 2017 biological opinion (BiOp) and the Oregon Department of Environmental Quality (DEQ) March 31, 2015 Clean Water Act (CWA) Section 401 Water Quality Certification (401 WQC) for the operations and maintenance dredging program at the Oregon Coastal Projects.

Turbidity monitoring must be conducted during all dredging operations at all of the Coastal Projects during daylight hours. Visual monitoring will be conducted when dredging sediments that contain less than 20% fine-grained material. When dredging in areas of greater than 20% fine-grained sediments (equal to or greater than 20% silts/clays) monitoring shall be conducted using a turbidimeter.

The work procedures described herein have been coordinated with the State of Oregon and the National Marine Fisheries Service to ensure compliance with all applicable Water Quality Certificates and the Biological Opinion. All requirements of the state Water Quality Certificate and the Biological Opinion apply.

If there is a discrepancy between the Monitoring Plan and the Water Quality Certificate or the Biological Opinion, the more restrictive requirement applies.

Visual Monitoring. Visual monitoring shall follow the conditions of the 401 WQC. During dredging and disposal operations turbidity shall not exceed 10% above natural stream turbidities.

Turbidity must be visually assessed and recorded every two hours during periods of active dredging, disposal, and dewatering (ie. during all in-water work). Monitoring points shall be 200 feet upcurrent (representative background), 200 feet downcurrent (compliance point), and at the discharge point. The bow and stern of some of the dredge vessels (e.g. Yaquina or Essayons) may be considered the up- and downcurrent monitoring points depending upon vessel position and tidal conditions.

Any visible project-related turbidity 200 feet downcurrent of the discharge point is considered to be an exceedance of the DEQ standard. If a 10% exceedance of the background level occurs at 200 feet downcurrent of the discharge point, the activity must implement measures to reduce turbidity, including, but not limited to, the measures identified in the 401 WQ or BiOp and continue monitoring every two hours. If exceedance occurs with two consecutive measurements (a total of two monitoring events over four hours), the activity causing the turbidity must be stopped until the problem is resolved. The designated person attending the monitoring shall be responsible for notifying the project foreman of any exceedance of the turbidity standard.

Metered Monitoring. In areas where sediments contain greater than 20% fine-grained material, a turbidimeter shall be used to quantify change in turbidity as nephelometric turbidity units (NTUs). Readings will be taken during daylight hours at monitoring points 200 feet upcurrent (representative background), 200 feet downcurrent at mid-depth (compliance point) during

REPLACED IN ITS ENTIRETY A10-1 AMD# 0001

dredging operations. If a visible plume is present, the compliance point shall be within the plume and compared to the background reading.

Background Sampling. Background samples must be taken immediately prior to conducting each compliance test. Background samples will be taken upcurrent of dredging and placement operations, within the authorized navigation channel if possible, and well outside the influence of the dredging operation. Obtaining a sample outside the influence of the dredging or placement operation is critical to ensuring valid compliance tests, and is the primary consideration when selecting a location.

Dredging Compliance Samples. Compliance samples must be taken during daylight hours during active dredging, and in the turbidity plume if visible. Sampling frequencies, locations, and types are organized below by Federal Projects.

Turbidity Monitoring for Dredging

Dredge Areas

Frequency of Testing Representative Background Test Location

Compliance Test Location

Type of Sample

Rogue River Boat Basin Access Channel

Every two hours during daylight and active dredging

200 feet upcurrent of in-water disturbance; mid-depth;

200 feet downcurrent of in-water disturbance;

within any visible plume, if there is one; mid-depth;

Visual

Dredging from 15 June to 15 July will be limited to just the dredge prism shown and to mechanical dredging equipment only.

After 15 July dredging equipment and methods return to routine pre-established equipment and methods.

Placement Compliance Testing. Compliance observations must be taken during daylight hours, during active placement, and in the turbidity plume, if visible. Observation frequency and location are listed below.

Turbidity Monitoring of Placement Site Options

Placement Areas

Frequency of Testing Representative Background Test Location

Compliance Test Location

Type of Sample

ODMDS No testing required

*Discharge from Upland Placement Site

Every two hours during daylight and active discharge;

200 feet upcurrent of in-water disturbance; mid-depth;

200 feet downcurrent of in-water disturbance;

within any visible plume, if there is one; mid-depth;

Turbidimeter

*Discharge is expected from hydraulic dredging; discharge from the upland site is not expected from other dredging methods.

There is an expectation that fines within the upland site will be incorporated into the overall site discharge and therefore instrument monitoring will be required. Hydraulic dredging will only be allowed starting with the 15 July regular environmental window start.

REPLACED IN ITS ENTIRETY A10-2 AMD# 0001

Notes.

1. Daylight hours are determined by the published times for sunrise and sunset. These will be noted on the water quality monitoring report.

2. Water quality monitoring will not be done under any unsafe conditions by the boat operator, captain or other individual. A monitoring interval may be omitted during unsafe conditions for the monitoring boat. As long as monitoring can be done within the two hour increment, third party verification will not be made. However, if conditions do not improve by the end of the two hours as required, a third party notification will be required.

Should the boat operator or dredge captain determine that conditions are unsafe for the monitoring boat; this must be verified via an independent third party such as the Coast Guard Watch Stander, National Weather Service, or other credible third party. This verification must be done in writing by preparing a written record of the telephone conversation (worksheet attached). Third party verification must be obtained prior to the end of the two hour reporting cycle.

3. A positive means of determining relative position of the monitoring boat to the dredge, such as an Electronic Distance Measure (Range Finder) will be kept on the monitoring boat and used to periodically check positioning.

4. The testing depth will be automatically logged by the turbidity meter on the Water Quality Monitoring Report.

5. Coordinates will be automatically logged by the turbidimeter for all test locations by a differential GPS unit. This coordinate data will be reported in NAD 83 (State Plane Oregon North) on the Water Quality Monitoring Report.

6. The instrument will be lowered to the testing depth (background and compliance); the reading will be taken shortly after reaching the testing depth. The only exception is if the readings are rapidly going up, which indicates that the instrument display has not had time to increment up to the correct reading. The reading will not be taken until the display number has stabilized.

Equipment (non-visual monitoring).

1. Instrumentation. The YSI Meter (or approved equivalent) will be used for turbidimeter measurements with the following features:

a. Turbidity Probe, Model 6136

b. Logger 650 MDS

c. Sonde: Appropriate for Turbidity Probe, Model 6136

2. Calibrations:

a. The turbidity probe will be calibrated once a week, or more if data is suspect. A two point calibration method will be used and calibrations will be in accordance with the manufacturer’s instructions.

b. The YSI data logger clock will be checked against the dredge clock daily.

c. The results of the calibrations (including measurement value against a standard) will be recorded in the Daily Quality Monitoring Report.

3. Instrument parameters: The YSI instrument (or approved equivalent) will be set to take discrete readings every 0.5 seconds.

REPLACED IN ITS ENTIRETY A10-3 AMD# 0001

4. Downrigger System: The YSI water monitoring meter (or approved equivalent) will be mounted on an automatically operated downrigger with a 15-pound minimum weight.

Downrigger stops will be installed at the testing depth so it can be rapidly reached quickly while the boat is in position for testing. A manual downrigger will be stored on each monitoring boat in a readily accessible location. This manual downrigger will be used in the event that the automatic downrigger malfunctions. All necessary mounting hardware for the manual downrigger will be installed on the boat so that the manual downrigger can be quickly put in place.

5. The Operations Manual supplied by YSI will be available during monitoring. A copy of this manual will be kept with all instructions.

6. Instrument Accuracy: For the YSI meter specified, the manufacturer’s stated accuracies are as follows:

a. Turbidity: +/- 2 NTU or 5% of the reading, whichever is greater.

All measurements should be considered to be a range of values based on the stated accuracy. For example, a measurement of 8 NTU would be considered to be a range of 6 NTU to 10 NTU.

Turbidity will be reported to the nearest 1 NTU. Conventional rounding will be used. For example 0.5 or greater, should be rounded to 1 when reporting whole numbers.

Compliance.

Turbidity: Turbidity must be measured and recorded as described above. All samples must be recorded. Results must be compared to the background sample taken during that monitoring event.

Determination of compliance must take into account the accuracy of the instrument (compliance range calculation examples attached). Turbidity is considered to be in exceedance when the lower range value of the compliance measurement (considering instrument accuracy) is greater than the upper range value of the sum of the background measurement and acceptable compliance range (defined in table below).

Turbidity is considered to have returned to background when the lower range value of the compliance measurement is at or below the upper range value of the background measurement.

If an exceedance is measured, a re-test will be taken immediately. If the value of the re-test is also an exceedance, the exceedance is confirmed for that monitoring interval and action must be taken according to the table below. If the re-test value is within acceptable levels, the initial exceedance is not confirmed so there is no exceedance for that monitoring interval.

If a confirmed exceedance occurs at two consecutive monitoring intervals, the activity must stop until the turbidity levels return to background (as confirmed by another sample). At that time, activity may resume with the minimum frequency of monitoring while maintaining compliance.

MONITORING WITH A TURBIDIMETER

Allowable Exceedance Turbidity

Level Action Required at 1st Monitoring

Interval Action Required at 2nd Monitoring

Interval

0 to 5 NTU above background Continue to monitor every 2 hours Continue to monitor every 2 hours 5 to 29 NTU above background Modify BMP’s and continue to monitor every 2 hours Stop work after 4 hours at 5-29 NTU above background

30 to 49 NTU above background Modify BMP’s and continue to monitor every 2 hours

Stop work after 2 confirmed hours at 30-49 NTU above background

REPLACED IN ITS ENTIRETY A10-4 AMD# 0001

50 NTU or more above background Stop work Stop work

During re-sampling to determine when levels return to background, a new background sample for turbidity will be obtained if it appears that conditions have changed such that the background sample may be invalid, or if up to two hours have passed. If a new background sample is obtained, the reason therefore must be clearly annotated on the Water Quality Monitoring Report.

Dredging and Placement by Pipeline dredges. USACE and its contractors must conduct dredging operations employing Best Management Practices (BMP’s) which minimize disturbance or siltation of adjacent habitat or waters. These BMP’s must include the following:

1. Pipeline suction must be operated at or below the surface of the sediments being removed during all periods of active dredging.

2. Reverse purging of the intake line must be kept to an absolute minimum. Should purging be necessary, the intake line may be raised no more than 3 feet from the bottom.

3. If water is pumped through the pipeline the intake must be within 3 feet of the bottom.

4. Dredging of holes or sumps below maximum depth and subsequent redistribution of sediment by dredging, dragging, or other means is prohibited.

5. Floating containment and absorbent booms must be maintained on site throughout implementation of the project and deployed in the event that any sheen or floating debris is detected during dredging operations.

6. In-water placement via pipeline must employ BMP’s to accomplish the discharge at least one-half the depth of the channel so that the discharge occurs sufficiently below the surface of the water.

Reporting.

Daily Water Quality Monitoring Report. There must be a water quality report completed for each day that there is scheduled activity; if no activity actually occurs during a monitoring interval (i.e.

the dredge is down for repairs) a report must be submitted with an explanation in the Remarks column. Example reporting forms for turbidity sampling by instrument are attached. Electronic copies will be provided. The following data will be included:

1. Date

2. Published times for sunrise and sunset

3. Test (Background, compliance, confirmation of exceedance (if applicable), return to background)

4. Location (Channel Dredge Area or Placement Site name)

5. Contract Name

6. Contract Number

7. Size of the discharge pipe

8. Depth of water at the discharge point

9. Placement Site

10. Position in NAD 83 (State Plane Oregon North)

11. Depth logged by the YSI Instrument

REPLACED IN ITS ENTIRETY A10-5 AMD# 0001

12. Tidal State (ebb/flood/slack) at the time of testing

13. Time

14. Remarks – the remarks column will contain any statements necessary to explain the data including the following:

a. Delays in the testing cycle and the reason therefore (for example if the dredge was down for repairs)

b. Delays in monitoring due to restricted visibility

c. Locations where water quality criteria were exceeded, along with actions taken (i.e.

was the operation modified or stopped)

d. Additional samples performed to confirm exceedance or return to background, this must be noted

e. If operation is modified or stopped as a result of an exceedance: what time the modification or stoppage began, how long it lasted, and what time operations resumed

f. Best Management Practices used to bring the levels back into compliance

g. Observation of visible plume at each compliance point that exceeds water quality criteria

15. Date and results of calibrations

REPLACED IN ITS ENTIRETY A10-6 AMD# 0001