Response to Council's Information Request · MCU14/0077

 

 

a

SEDIMENT & EROSION CONTROL NOTES

 

Erosion and sediment control devices shall be installed and maintained in
accordance with these drawings unless an alternative proposal is approved in
writing by the superintendent. Additional erosion and sediment controls shall
also be installed as necessary during construction.

All erosion and sedimentation control devices shall be installed prior to
stripping topsoil or commencing earthworks anywhere else on site unless
otherwise approved by the superintendent. An inspection hold point is
required at this point prior to the works proceeding.

Where erosion and sediment control devices cannot be installed due to
earthworks or other work operations, they shall be installed at the earliest
possible date.

Permanent coverage of disturbed areas with topsoil and turf, hydromulch or
mulch (and jute matting if required) is to be undertaken at the earliest
practical time.

Turf shall be laid behind kerb and channel for full verge width.

In order to prevent erosion from concentrated flow paths, the contractor shall
follow the following site protection principles:

- Install turf in permanent open drain;

- Install geofabric in temporary open drains where shown on drawing;

- Install sand bags, rock check dams or mulch bunds at 20m centres in all
concentrated flow paths including cut-off drains along kerb and channel,
along sediment fences, mulch or earth bunds except where drains are lined
with turf or geofabric.

All disturbed areas shall be covered with 100mm of topsoil prior to turfing,
seeding, hydromulching or mulching.

All batters 1 on 4 and steeper shall be tined to a depth of 200mm in
accordance with Main Roads specifications prior to topsoiling and mulching
(75mm thick). Batters steeper than 1 on 2 shall also have heavy duty jute
matting installed over the mulch. all other disturbed areas shall be covered
with hydromulch.

9.

10.

11.

12.

13.

14

15,

The underground drainage system shall be used to convey runoff throughout
construction. All drainage pits shall be constructed prior to placement of
sub-base material and shall contain a suitable cut-out to capture run-off from
base of boxing during construction.
The underground drainage system including all pits, pipes and GPT shall be
cleaned of sediment prior to on maintenance. Unless otherwise approved by
the Superintendent all temporary erosion and sediment control measures
shall be removed at the completion of construction.

However such removal shall not proceed until the site is stabilised to the
Superintendent's satisfaction.

All construction vehicles shall be cleaned of mud and/or loose dirt prior to
leaving the site.

No release, or flow is permitted from the site, throughout the earthworks and
construction period, to any waterway, or stormwater drain or drainage line
leading to a waterway or area of native vegetation, unless the level of total
suspended solids does not exceed a concentration of 50 milligrams per litre.
An effective water quality self-monitoring program, including at least one
representative measurement of the total suspended solids quality of any flow
or release from the site on each day runoff to water occurs, must be
implemented continuously throughout the life of the works which are the
subject of this approval. Where the findings of the required performance
self-monitoring program indicate that the 50mg/L TSS compliance limit is being
or is likely to be exceeded, remedial action must be taken without delay to
ensure ongoing compliance.

Sufficient stockpiles of mulch and/or other similar required erosion and
sediment control materials and stores must be maintained on site at all times
to enable ongoing erosion control, as well as site contingencies e.g. imminent
wet weather, to be dealt with, until commencement of on maintenance.

 

ISSUES
TASK

EROSION & SEDIMENT CONTROL

STORMWATER QUALITY

 

PERFORMANCE

MINIMIZE SOIL EROSION SITE DURING
CONSTRUCTION AND REHABILITATION STAGES
AND AT ALL TIMES PREVENT THE TRANSPORT

OF SEDIMENT FROM THE SITE.

AVOID DETRIMENTAL IMPACT ON THE WATER QUALITY AND AQUATIC ENVIRONMENT OF DOWNSTREAM WATER
BODIES AS A RESULT OF DISCHARGE OF CONTAMINATED STORMWATER RUNOFF FROM CONSTRUCTION WORKS
AND COMPLY WITH THE ENVIRONMENTAL ACT ON ENVIRONMENTAL PROTECTION POLICY FOR WATER.

 

MANAGEMENT
STRATEGY

e INSTALL THE CONTROL DEVICES AND .
FOLLOW THE STABILIZATION PROCEDURES .

DESCRIBED ON PLANS.

e LIMIT THE EXTENT OF STRIPPING TO THE
STAGE AREA PRESENTLY UNDER

CONSTRUCTION.

e ALL MUD AND SILT DEPOSITED ON THE
ADJACENT ROADWAY SHALL BE REMOVED .
BY SWEEPING.

e¢ PROTECT STORMWATER DRAINAGE INLETS

COMPLY WITH THE ENVIRONMENTAL PROTECTION ACT AND ENVIRONMENTAL PROTECTION POLICY (WATER)

ALL CONTROL MEASURES SHALL BE IN PLACE PRIOR TO COMMENCING SITE STRIPPING.

e¢ CONSTRUCTION MATERIALS AND STOCKPILES STORED ON SITE SHALL BE PLACE IN PREPARED LOCATIONS,
AND PROTECTED AS SHOWN.

e FUELS AND OILS SHALL BE SAFELY STORED TO AVOID INUNDATION. ANY SPILLAGES WITHIN THESE

COMPOUNDS SHALL BE IMMEDIATELY ATTENDED TO SO AS TO LIMIT THE POTENTIAL FOR IMPACT

OFF-SITE.

PROVIDE CONTROL MEASURES TO PREVENT SOIL EROSION , SCOURING, SEDIMENT TRANSPORT AND

DEPOSITION. THESE MEASURE ARE IDENTIFIED IN THE SOIL & EROSION CONTROL PLAN BUT MAY BE

EXTENDED AS REQUIRED AND MAY INCLUDE:

AS SHOWN BELOW UNTIL THE SITE HAS — TEMPORARY RETARDATION BASIN
BEEN STABALIZED.

e WASH FROM EXPOSED AGGREGATE
CONCRETING SHALL BE WHOLLY
CONTAINED ON SITE. CEMENT RESIDUE
SHALL BE ALLOWED TO DRY THEN

REMOVED FROM SITE.

— TEMPORARY SILT FENCE

— DIVERSION OF UPSTREAM CATCHMENT AROUND DISTURBED AREAS

e IN AREAS WHERE RUNOFF TURBIDITY IS TO BE CONTROLLED, EXPOSED SURFACES SHALL BE MULCHED
OR STABILIZED WITH TURF IF EARTHWORKS ARE EXPECTED TO EXTEND FOR THAT TWO WEEKS.

e¢ PERMANENT CONTROL MEASURES WILL BE IN PLACE UPON COMPLETION OF CONSTRUCTION, HOWEVER
MAINTENANCE WILL BE REQUIRED OF SOME TEMPORARY FACILITIES UNTIL FULL SITE REHABILITATION HAS
BEEN ACHIEVED.

 

MONITORING

THE PRINCIPAL CONTRACTOR SHALL AT ALL
TIMES ENSURE THAT CONTROL DEVICES ARE
CORRECTLY INSTALLED AND ADEQUATELY
MAINTAINED, IN PARTICULAR PRIOR TO
FORECAST PERIODS OF RAIN OR STORMS.

THE PRINCIPAL CONTRACTOR SHALL ENSURE NO SUSPENDED SOLIDS OR CONTAMINANTS ARE VISIBLE IN
SURFACE RUNOFF LEAVING THE SITE.

 

CORRECTIVE
ACTIONS

e« EMPTY AND REPAIR TRAPS REGULARLY.

e REPAIR OR REPLACE DAMAGED CONTROL .
DEVICES.

e PLACE ADDITIONAL CONTROL DEVICES
WHERE EXISTING INSTALLATIONS ARE
INADEQUATE.

REPAIR OR EXTEND CONTROL DEVICES TO OPERATE ADEQUATELY.
e INSTALL ADDITIONAL SEDIMENTS TRAPS TO RETARD SURFACE RUNOFF ACROSS THE WORKS AREA.

 

REPORTING

 

 

WEEKLY REPORTS BY THE PRINCIPAL
CONTRACTOR TO THE CONSULTANT DETAILING
MAINTENANCE PROGRAM, ADDITIONAL WORKS
AND THE PERFORMANCE OF CONTROL
MEASURES.

WEEKLY REPORTS BY THE CONTRACTOR TO THE CONSULTANT OUTLINING THE EFFECTIVENESS OF CONTROL
MEASURES AND DETAILS OF ANY CORRECTIVE ACTIONS TAKEN

 

 

 

SEDIMENT & EROSION MANAGMENT PLAN

 

 

 

 

© OBJECTIVE:

SEDIMENT AND EROSION CONTROL MANAGEMENT PLAN:

 

Provide education of site personnel
Set up action plans as a precaution in case of disturbances occuring

Prior to the commencment of any construction activities the following measures
shall be incorporated:

especially after an unexpected strong rainfall event

DISCLAIMER — ENSURE ORIGINAL SIZE DRAWING IS USED
FOR ASSESSMENT, TENDERING AND CONSTRUCTION.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

To minimise erosion on site and ensure sediment is not washed down to the receiving waterways due to construction e Provide regular inspection and maintenance of all structures including the ‘Amd Description Date
temporary structures.
LEGEND * LEGISLATION:
Environment Protection Act 1994
Existing storm water Environmental Protection Water Policy 1997
The Integrated Planning Act 1997
Storm Water Drainage
e RESPONSIBILITY:
Agi Drain The responsibility for all measures regarding the sediment and erosion control during construction shall be with the
CONTRACTOR. The contractor shall appoint one staff member, ideally the foreman to be responsible for:
Floor Waste .
° FWG gully ***the location of drain paths such as swales and trenched, cut off swales, catch drains and perimeter banks. All of BoCS TO SONS SUCTION THE CONTRACTOR SHALL PROVIDE A
these measures shall ensure the runoff is directed to the sedimentation basin during construction. PLAN FOR STOCKPILING, MATERIALS STORAGE AND WASTE
i GP1 Gully Pit “the waste and wash down of materials and goods in particular concrete and cement shall be separated, set to dry MANAGEMENT. THIS PLAN MAY BE A HAND DRAWN SKETCH BUT
wes disposed of . SHALL BE VISIBLEY PLACED IN THE SITE OFFICE. Issue Notes Date
installation and maintenance of the sediment control fences all around the perimeter as shown in plan . _O5_
. * - - ADVICE: For Development Approval| X 21-05-14
——_1—"—"_ Sediment Fence *“control of fences, sandbags and bales as well as the sedimentation basin after each rainfall event . LOCATE STOCK PILES ON LEVEL GROUND AWAY —
a inimi it it Si For Building Approval x 21-05-14
‘control of the entry/exit path and the minimization of sediment transfer to the street in particular control of concrete FROM AREAS SUBJECT TO CONCENTRATED
———— Boundary eee ecies statf and lead b OVERLAND FLOW. For Tender
. Supervise other members OF Stall and lead by example ay i . CONSTRUCT A PERMENENT BANK OR CATCH DRAIN For Construction
9 Diameter **“ensure enough litter collection devices are provided for the collection of daily litter such as cans, bottles, paper, ABOVE STOCK PILE TO PROTECT IT FROM UPHILL
C.0.8, Cleanout to surface butts and also building material cut offs. RUNOFF. IAs Constructed
Een Eccentric Enlarger **“ensure all stockpiles for both incoming and outgoing goods in particular soils and sands are clearly marked and not . CONSTRUCT A SEDIMENT FENCE BELOW THE
PRL Finished floor level blocking drain paths and kept neat and clean. STOCKPILE TO TRAP SEDIMENTS BEING WASHED
GP Gully pit *control the flow path of stormwater at all times during construction and use swales, sandbags, bales and other OFF THE PILE
a pully Mon Hole b measures to ensure the runoff is directed to the sedimentation basin at all times. . PROVIDE ACCESS TO STOCKPILE FROM SIDE SO AS
nspection Chamber
IL Invert Level TO AVOID RUNOFF PASSING THROUGH. .
K&C Kerb & Channel ACTIONS: / a / H draulic Me)
MH Manhole In case of major rainfall events the following action plan shall be followed and responsibly looked after by the '
Po Planter outlet CONTRACTOR: CUT-OFF DRAIN ALONG CONTOUR — LONG TERM PLASTIC SHEET WHEN RAIN OR
RPB Real Property Boundary \~
RPD Real Property description “DON'T WAIT UNITL IT IS TOO LATE! STOCKPILES ONLY (GRADE AT 1 IN 100 max. TO FREE HIGH WINDS ARE EXPECTED. Reinhold K .
RWO Rain water outlet be on site during the rainfall period and monitor the drain paths. Redirect where required. OUTLET.) STABILIZE ALL EARTHWORKS AREAS WITH TURF. CONTACT: einno oenning MiEAust RPEQ No 7023
RWH Rain water head *check the fences after every rainfall and replace the fences where required. Check and replace all barriers, PO Box 181
SL Surface Level bales, sandbags and temporary swales, cut off drains and trenches where required. Moffat Beach, QLD, 4551
Sq Square ***clean out sedimentation material as soon as the moisture content allows it. email: [email protected]
SWD Storm water drain “check the receiving pit and improve the barriers if required. PH: (07) 5491 4333 FX: (07) 5491 4233
Ta Trench grate transverse bar “REMEMBER: EACH RAINFALL IS THE EVENT TO ACTIVELY WATCH AND CONTROL THE RUNOFF! CLIENT :
TG(I) Trench grate longitudinal bar
u/g Underground WILSON CLARK CONSTRUCTIONS
u/s Under slab
u.n.o. Unless noted otherwise SEDIMENT FENCE AS SPECIFIED ALONG CONTUR ARCHITECT :
(EXTEND 3m min. EACH SIDE OF STOCKPILE. \ COOL ARCHITECTURE J
STOCKPILES (PRosect: 10/100 RENE STREET »
NOOSAVILLE
1. PLACE STOCKPILES 5m min. UPSTREAM OF EXISTING VEGETATION,
CONCENTRATED WATER FLOW, ROADS, AND HAZARD AREAS.
2. CONSTRUCT ALONG THE CONTOUR AS LOW, FLAT, ELONGATED DRAWING TITLE:
MOUNDS (2m max. HEIGHT.)
ESC
NOTES M)
Design | RK. Checked Ch Dote | 21—05—14 | Dwg. No. AMD,
SCALE : N/A ON At UN.o.| 6 of 6 2864—OP6 J

 

 

 

 

 

RPD:—

LOT 10 SP 230643