Homebush BayRemediation Cap -Inspection and Photographic Survey … · 2020. 12. 14. · Homebush...

9 May 2016

Chri Blake Snr Environmental Speciali t (Land Management) Road and Maritime Service

By ema l: Chr s.Blake@rms.nsw.gov.au

Dear Mr Blake

Homebush Bay Remediation Cap - Inspection and Photographic Survey

Introduction

Ventia Utility Service Pty Ltd (Ventia) wa engaged by Road & Maritime Service (RMS) to conduct an

in pection and photographic urvey of the Remediation Cap located along part of Homebu h Bay, Rhode ,

NSW (the Site). The ite locality i depicted within ttachment 1.

Scope of works

The cope of work wa provided to Ventia by RMS and included the following:

• In pection of the capping layer from hore; • Photographic urvey; and • Thi ummary letter report detailing finding of the annual in pection.

Background

The requirement for Action 4 of the RMS Homebu h Bay Maintenance Order Implementation Plan dated November 2014 are a follow :

Roads and Mar t me s requ red to nspect the ntegr ty of the clean capp ng layer annually. Th s ncludes an annual v sual nspect on of the Land to ensure that there are no v s ble s gns of damage to the capp ng layer that would affect the ntegr ty of the clean capp ng layer ( nclud ng the geofabr c marker layer).

The action in the Implementation Plan are drawn from the Homebu h Bay Environmental Management Plan (EMP) prepared by Thie Service Pty Ltd (now Ventia) dated November 2013.

Field Methodology

The fieldwork wa performed by a Ventia technician between 4 and 8 April 2016 during low tide and

included the following ta k :

1. Vi ual in pection of the expo ed near hore ediment at low tide to identify:-

a. Area of expo ed geofabric layer;

b. Area of couring or other deterioration in the cap integrity; and

2. Photographic (dilapidation) urvey at pre-determined location .

VENTI UTILITY SERVICES PTY LTD 1

The ‘Homebu h Bay Remediation Area’ and ‘Sediment Remediation Area’ were in pected in 10m wide

egment . The ‘Homebu h Bay Remediation Area’ con i ted of 110 egment and the ‘Sediment

Remediation Area’ con i ted of 11 egment . In pection location are depicted within ttachment 2 while

photograph of all location are pre ented within ttachment 3.

It i noted that a ve el wa not utili ed due to poor vi ibility from the murky water re tricting the ability

to adequately in pect the cap integrity. A an alternative, field technician wore wader to in pect area

up to 20 m (knee depth) from the horeline and a hovel u ed to probe and directly ob erve the capping

material.

Summary of Field Observations

During the in pection of the capping layer the following wa noted:

• Pile have been driven through the ediment and capping layer for the con truction of the new bridge (Section 076 – 098). No evidence of couring around the e pile wa ob erved, however the integrity of the geofabric layer below the ediment and hale backfill could not be confirmed in the e location ;

• No vi ible ign of couring or deterioration of the capping layer wa ob erved during the in pection of the 121 ection ;

• No geofabric wa ob erved in the 121 ection that were in pected; and

• Additional ediment (above the hale backfill) wa ob erved along area of the capping layer of up to 100 mm thick.

It hould be noted that at 22 location (Refer to photographic urvey location 076 to 098 a hown in

ttachment 3) are within the con truction zone of a new bridge. Silt curtain i hown in the photographic

urvey.

Conclusion

Ba ed on the vi ual in pection within the remediation area , there were no vi ible ign of damage to the capping layer and geofabric. It can be concluded that the integrity of the clean remediation capping layer ha not been compromi ed.

If you have any que tion plea e do not he itate to contact either of the under igned.

Your incerely,

Ho Nguyen Rowan Grace Environmental Engineer Project Manager T: 03 9273 7600 T: 02 9375 3548 E: ho.nguyen@ventia.com.au E: rowan.grace@ventia.com.au


ttachments

Attachment 1: Site Locality

Attachment 2: In pection Location

Attachment 3: Photographic Survey


ttachment 1 – Site Locality


1 2 3 4 5 6 7 8

J J

PARRAMATTA I RIVER I

SYDNEY OLYMPIC PARK FERRY WHARF

RHODES BOAT RAMP

H FORMER ALLIED H

HOMEBUSH BAY FEEDS SITE

REMEDIATED AREA

FORMER LEDNEZ /

UNION CARBIDE SITE G G

F F

HOMEBUSH BAY

ORICA SITE (FORMER ICI SITE)

E E SEDIMENT

REMEDIATED AREA

FORMER BERGER PAINT FACTORY

D D

C C

B B

0 200

metres SITE APPROX. SCALE ONLY

A A

HOMEBUSH BAY REMEDIATION DRAWING TITLE

VENTIA UTILITY SERVICES PTY LTD FIGURE 01 ACN: 010 725 247 ABN: 51 603 146 676 SITE LOCALITY & REMEDIATION AREAS 111 VANESSA ST KINGSGROVE NSW 2208 PHONE (02) 9375 3200 FAX (02) 9375 3370

SCALE

A4 NTS PROJECT NO. REV

D 1 2 3 4 5 6 7 8

ttachment 2 – Inspection Locations


1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

K K

J

H

030

020

010

001

LEGEND

INSPECTION LOCATION ### IDENTIFIER

REMEDIATION AREA OUTLINE

0 20 40 60

metres APPROX. SCALE ONLY

80 100

111

J

H

G 050

040 112

113 G

060 114

F

070

080 116

115

121 F

E 090

117

119

120

E

100

D 110 D

0 200

C metres APPROX. SCALE ONLY

C

B B

A A

THE INFORMATION SHOWN ON THIS DRAWING IS FOR THE PURPOSES OF THIS PROJECT ONLY. NO WARRANTY IS GIVEN OR IMPLIED AS TO HOMEBUSH BAY REMEDIATION ITS SUITABILITY FOR ANY OTHER PURPOSE

VENTIA UTILITY SERVICES PTY LTD DRAWING TITLE

D

C

B

A

REV

04.05.2016 LEGEND UPDATED. SCALE BARS ADDED

01.05.2016 ISSUE FOR VENTIA



DATE DESCRIPTION

KB

KB

KB

KB

BY

HN

HN

HN

HN

APP'D REVIEWED

DESIGN

DRAWN

REF:

PREPARED

HN

KB

CHECKED DESIGN CONSULTANT APPROVED

KIERAN BURNS

DATE 4/05/2016 SITE ADDRES: HOMEBUSH BAY SYDNEY NSW 2144

ACN: 010 725 247 ABN: 51 603 146 676 111 VANESSA ST KINGSGROVE NSW 2208 PHONE (02) 9375 3200 FAX (02) 9375 3370

FIGURE 02 - INSPECTION LOCATIONS

SCALE DRG NO.

NTS FIGURE - 02 REV

D 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

ttachment 3 – Photographic Survey


Attachment 3 – Photographic Survey

VENTIA UTILITY SERVICES PTY LTD 1

Inspection Location 001





Structure BookmarksIntroduction Scope of works Background Field Methodology Summary of FieldObservations Conclusion Attachment 3 – Photographic Survey

Homebush BayRemediation Cap -Inspection and Photographic Survey … · 2020. 12. 14. · Homebush...

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