Section 35 20 24 (7 Apr 21) Amendment1.pdf

Redwood City Channel FY21 Maintenance Dredging W912P721B0003

SECTION TABLE OF CONTENTS

DIVISION 35 - WATERWAY AND MARINE CONSTRUCTION

SECTION 35 20 24

AQUATIC DISPOSAL

PART 1 GENERAL

1.1 REFERENCE

PART 2 PRODUCTS

PART 3 EXECUTION

3.1 GENERAL

3.2 SUBMITTAL REQUIREMENTS

3.3 TRANSPORTATION

3.3.1 Overflows

3.3.2 Open Ocean Transit (Where Applicable)

3.4 DISPOSAL SITE QUANTITY LIMITS

3.4.1 Carquinez Site (SF-9)

3.4.2 San Pablo Bay Disposal Site (SF-10)

3.4.3 Alcatraz Island Disposal Site (SF-11)

3.4.4 Suisun Disposal Site (SF-16)

3.4.5 San Francisco Deep Ocean Disposal Site (SF-DODS)

3.5 DISPOSAL SITE LOCATIONS

3.5.1 Carquinez Site (SF-9)

3.5.2 San Pablo Bay Disposal Site (SF-10)

3.5.3 Alcatraz Island Disposal Site (SF-11)

3.5.4 Suisun Disposal Site (SF-16)

3.5.5 San Francisco Deep Ocean Disposal Site (SF-DODS)

3.5.6 San Francisco Channel Bar Disposal Site (SF-8):

-- End of Section Table of Contents --

SECTION 35 20 24 Page 1 Apr 06, 2021

SECTION 35 20 24

AQUATIC DISPOSAL

PART 1 GENERAL

1.1 REFERENCE

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

U.S. ARMY CORPS OF ENGINEERS (USACE)

EM 1110-1-2909 (2012) Geospatial Data and Systems

EM 1110-2-1003 (2013) Hydrographic Surveying

EM 110-2-5025 (2015) Dredging and Dredged Material Disposal

US Environmental Protection Agency

US EPA Publications

San Francisco Bay Conservation and Development Commission (BCDC)

BCDC Publications

San Francisco Regional Water Quality Control Board (SFRWQCB)

SFRWQCB Publications

SF BAY Long Term Management Strategy (LTMS)

SF BAY LTMS (2001) Long-Term Management Strategy for the Placement of Dredged Material in the San Francisco Bay Region.

https://www.spn.usace.army.mil/Missions/ Dredging-Work-Permits/LTMS

PART 2 PRODUCTS

Not Used

PART 3 EXECUTION

3.1 GENERAL

The procedure and methodology associated with the placement of dredged material at aquatic disposal sites are guided by Corps' publication: EM 1110-1-2909 (2005) Geospatial Data and Systems, EM 1110-2-5025 (1983) Dredging and Dredged Material Disposal and SF Bay LTMS (2001) Long-Term Management Strategy for the Placement of Dredged Material in the San Francisco Bay Region.

All plant and equipment to be used in performing the work shall be of

SECTION 35 20 24 Page 2 Apr 06, 2021 sufficient size and efficiency to meet the job requirement. The Government and other authorized personnel shall be allowed access to all equipment and materials pertaining to this contract for the purposes of monitoring and inspection.

3.2 SUBMITTAL REQUIREMENTS

not used

3.3 TRANSPORTATION

3.3.1 Overflows

No overflow or decant water shall be discharged from a scow. During transportation from the dredging site to the disposal site, no material shall be permitted to overflow, leak or spill from barge, bins or dump scows.

3.3.2 Open Ocean Transit (Where Applicable)

The maximum open-ocean tow speed shall be 6 knots over the bottom for loaded barges or as approved in writing by the Contracting Officer or delegated representative. No disposal barge shall be filled above its load limitation. Load limitation shall be defined as 80 percent of its load line or 80 percent of bin capacity, whichever governs. All scows shall have the 80 percent load line clearly marked inside of the bin for visual verification by the Contracting Officer or delegated representative.

3.4 DISPOSAL SITE QUANTITY LIMITS

Contractor using any of the following disposal sites shall not exceed the maximum quantity limit as defined below.

3.4.1 Carquinez Site (SF-9)

Disposing of greater than 500,000 cubic yards of dredged material at SF-9 per calendar month is prohibited.

3.4.2 San Pablo Bay Disposal Site (SF-10)

Disposing of greater than 500,000 cubic yards of dredged material at SF-10 per calendar month is prohibited.

3.4.3 Alcatraz Island Disposal Site (SF-11)

Disposing of greater than 400,000 200,000 cubic yards of dredged material at SF-11 per calendar month from October September to November is prohibited. Disposing of greater than 300,000 250,000 cubic yards of dredged material at SF-11 per calendar month from June to September August is prohibited. Disposal after 30 November is prohibited for this project.

3.4.4 Suisun Disposal Site (SF-16)

Disposing of greater than 200,000 cubic yards of dredged material at SF-16 per calendar year is prohibited.

3.4.5 San Francisco Deep Ocean Disposal Site (SF-DODS)

Disposal quantity limits for SF-DODS are established on a project-specific

SECTION 35 20 24 Page 3 Apr 06, 2021 basis. The Contractor shall limit disposal quantities to those amounts specified in the Government-provided regulatory guidance.

3.5 DISPOSAL SITE LOCATIONS

Contractor using any of the following disposal sites shall limit the placement of matiral within the geometrical shapes or extents as defined below.

3.5.1 Carquinez Site (SF-9)

Disposal at SF-9 shall be within a rectangular area, 1000 feet by 2000 feet, long axis bearing 050 true, and center at latitude 38 degree 03'50"N; longitude 122 degree 15'55"W.

3.5.2 San Pablo Bay Disposal Site (SF-10)

Disposal at SF-10 shall be within a rectangular area, 1500 feet by 3000 feet, long axis bearing 050 true, and center at latitude 38 degree 00'28" N; longitude 122 degree 24'55" W.

3.5.3 Alcatraz Island Disposal Site (SF-11)

Disposal at SF-11 shall be within Areas H, C, and I of the 1000 foot radius circular area with center located at latitude 37 degree 49'17" N;

longitude 122 degree 25'23" W.

3.5.4 Suisun Disposal Site (SF-16)

Disposal at SF-16 shall be within the confines of the Suisun Disposal Site which is located in Suisun Bay. The coordinates (NAD 83) of its rectangular configuration are:

38° 02' 58.14"N, 122° 06 13.02"W 38° 03' 04.59"N, 122° 05 57.79"W 38° 03' 14.26"N, 122° 05 17.57"W 38° 03' 19.81"N, 122° 05 02.09"W 38° 03' 40.72"N, 122° 04 21.19"W 38° 03' 51.35"N, 122° 04 00.40"W 38° 03' 47.20"N, 122° 03 57.00"W 38° 03' 36.25"N, 122° 04 18.43"W 38° 03' 15.46"N, 122° 04 59.08"W 38° 03' 09.62"N, 122° 05 15.36"W 38° 03' 00.00"N, 122° 05 55.38"W 38° 02' 53.78"N, 122° 06 10.06"W

3.5.5 San Francisco Deep Ocean Disposal Site (SF-DODS)

Disposal at SF-DODS shall be within a 600 meter (Approx. 2,000 feet) radius circular area with center located at latitude 37 degree 39.0' N;

longitude 123 degree 29.0' W (NAD 83). See Appendix 16 for additional information and map.

3.5.6 San Francisco Channel Bar Disposal Site (SF-8):

Disposal at SF-8 (Ocean) shall be within a rectangular area (Approx.

14,900 feet x 3,220 feet) located 7,500 feet south of and parallel to the San Francisco Main Ship Channel located at coordinates;

SECTION 35 20 24 Page 4 Apr 06, 2021

37°44'54.75"N, 122°37'21.91"W 37°45'44.75"N, 122°34'27.91"W 37°44'23.75"N, 122°37'09.92"W 37°45'14.75"N, 122°34'15.91"W

-- End of Section --

SECTION 35 20 24 Page 5 Apr 06, 2021