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Original Application Part 4 - Erosion Sediment Control [As Published] · 142008.1896
THIS EROSION AND SEDIMENT CONTROL (ESC) STRATEGY PROVIDES A CONCEPTUAL APPROACH TO ESC MANAGEMENT AT THE SITE.
POLICY
- EROSION AND SEDIMENT CONTROL TO BE IN ACCORDANCE WITH SOIL EROSION AND SEDIMENT CONTROL - ENGINEERING GUIDELINES FOR QUEENSLAND CONSTRUCTION SITES - THE INSTITUTION
OF ENGINEERS AUSTRALIA (QLD) 1996 (REFERRED TO AS IE AUST GUIDELINES).
- ACHIEVE CONSTRUCTION PHASE STORMWATER QUALITY OBJECTIVES FOR THE SITE
TIMING OF WORKS
- ALL WORKS SHALL BE CARRIED OUT IN THE DRY SEASON ONLY (APRIL - OCTOBER).
STAGING OF WORKS
- EACH STAGE SHALL BE COMPLETED PRIOR TO PROGRESSION TO THE NEXT STAGE.
STAGE 1: CONSTRUCT MACROPHYTE ZONE BUND WALLS AND MACROPHYTE ZONE SPILLWAY
- THE 2 LARGE CULVERTS ENTERING THE SITE SHALL BE BLOCKED IN UPSTREAM OF THE SITE AND MANAGED IN ACCORDANCE WITH THE DEWATERING MANAGEMENT PLAN
- CONSTRUCT AND MAINTAIN A TEMPORARY DAM UPSTREAM OF THE SEDIMENT FOREBAY TO PREVENT FLOWS THROUGH THE SITE. IMPOUNDED WATERS SHALL BE MANAGED IN ACCORDANCE
WITH THE DEWATERING MANAGEMENT PLAN
- INSTALL AND MAINTAIN SEDIMENT FENCES DOWNGRADIENT OF BUND WALLS
- STABILISE BUND WALLS AND SPILLWAY AT COMPLETION
STAGE 2: CONSTRUCT SEDIMENT FOREBAY WEIR, HIGH FLOW BYPASS AND OUTLET STRUCTURE
- THE 2 LARGE CULVERTS ENTERING THE SITE SHALL BE BLOCKED IN UPSTREAM OF THE SITE AND MANAGED IN ACCORDANCE WITH THE DEWATERING MANAGEMENT PLAN
- MAINTAIN A TEMPORARY DAM UPSTREAM OF THE SEDIMENT FOREBAY TO PREVENT FLOWS THROUGH THE SITE. IMPOUNDED WATERS SHALL BE MANAGED IN ACCORDANCE WITH THE
DEWATERING MANAGEMENT PLAN
- STABILISE BUND WALLS, HIGH FLOW BYPASS AND OUTLET STRUCTURE AT COMPLETION
STAGE 3: CONSTRUCT SEDIMENT FOREBAY
- THE 2 LARGE CULVERTS ENTERING THE SITE SHALL BE BLOCKED IN UPSTREAM OF THE SITE AND MANAGED IN ACCORDANCE WITH THE DEWATERING MANAGEMENT PLAN
- MAINTAIN A TEMPORARY DAM UPSTREAM OF THE SEDIMENT FOREBAY TO PREVENT FLOWS THROUGH THE SITE. IMPOUNDED WATERS SHALL BE MANAGED IN ACCORDANCE WITH THE
DEWATERING MANAGEMENT PLAN
STAGE 4: CONSTRUCT INLET SWALE
- THE 2 LARGE CULVERTS ENTERING THE SITE SHALL BE BLOCKED IN UPSTREAM OF THE SITE AND MANAGED IN ACCORDANCE WITH THE DEWATERING MANAGEMENT PLAN
SURFACE WATER QUALITY OBJECTIVES
WATER SHALL ONLY BE DISCHARGED FROM THE SITE IF IT MEETS THE FOLLOWING WATER QUALITY OBJECTIVES.
- pH 6.5 - 8.5
- TURBIDITY < 140 NTU
(A STRONG CORRELATION WAS DEVELOPED BETWEEN TURBIDITY AND SUSPENDED SOLIDS FOR AN ADJACENT SITE. 140 NTU IS EQUIVALENT TO 50 mg/L SUSPENDED SOLIDS)
- DISSOLVED OXYGEN 80-100% SATURATION
EROSION AND SEDIMENT CONTROL STRATEGY
- WHERE PRACTICAL, CONTROLS SHALL BE CONSTRUCTED OR INSTALLED PRIOR TO SOIL DISTURBANCE OR EXPOSURE
- CONTROLS SHALL REMAIN IN PLACE UNTIL THE SITE IS DEEMED STABLE OR UNTIL NO LONGER REQUIRED
- REFERENCE SHALL BE MADE TO THE IE AUST GUIDELINES FOR CORRECT CONSTRUCTION, INSTALLATION AND MAINTENANCE METHODS.
EROSION CONTROL
- SOIL EXPOSURE AND VEGETATION DISTURBANCE SHALL BE MINIMISED WHERE POSSIBLE
- DISTURBED AREAS SHALL BE STABILISED AS SOON AS POSSIBLE
- BATTER SLOPES SHALL STABILISED WITH EROSION CONTROL BLANKET SUCH AS 900 GSM COCONUT FIBRE BLANKET AND REVEGETATED
- INTERNAL ROADS SHALL BE STABILISED WITH ROCK AND GEOTEXTILE
- STABLE SITE ENTRY AND EXIT POINTS SHALL BE ESTABLISHED WITH ROCK AND GEOTEXTILE
- A VEHICLE WHEEL WASH SHALL BE ESTABLISHED AT SITE EXIT POINTS. DRAINAGE FROM THE WASH SHALL BE CONTAINED AND DIRECTED VIA A STABILISED FLOW PATH TO A SEDIMENT FENCE.
- ADDITIONAL EROSION CONTROLS SHALL BE IMPLEMENTED AS DIRECTED BY THE SITE ENVIRONMENTAL OFFICER, SUPERINTENDANT AND/OR THE ENVIRONMENTAL CONSULTANT
1.5 m star pickets DRAINAGE CONTROL
Self-supporting - DRAINAGE FROM DISTURBED AREAS SHALL BE DIRECTED TO SEDIMENT CONTROL DEVICES
at max. 2.5 m centres - SOIL STOCKPILES OR MATERIALS SHALL NOT BE LOCATED WITHIN OR ADJACENT TO ANY DRAINAGE LINE
geotextile
- TEMPORARY DRAINAGE LINES SHALL BE STABILISED BY USE OF GEOTEXTILE
- PERMANENT DRAINAGE LINES SHALL BE STABILISED WITH 900 GSM JUTE MATTING AND ROCK (NOMINAL SIZE 300 mm DIA., MAXIMUM SIZE 500 mm DIA.)
- CHECK DAMS SHALL BE ESTABLISHED IN TEMPORARY AND PERMANENT DRAINAGE LINES TO REDUCE WATER VELOCITY
- ADEQUATE PROTECTION SHALL BE PROVIDED AT STORMWATER PIPE OUTLETS USING ROCK AND GEOTEXTILE
- ADDITIONAL DRAINAGE CONTROLS SHALL BE IMPLEMENTED AS DIRECTED BY THE SITE ENVIRONMENTAL OFFICER, SUPERINTENDANT AND/OR THE ENVIRONMENTAL CONSULTANT
500 mm to 600 mm Direction of
flow SEDIMENT CONTROL
- SEDIMENT FENCES SHALL BE ESTABLISHED AROUND SOIL STOCKPILES
- SEDIMENT FENCES SHALL BE ESTABLISHED DOWN GRADIENT OF BUND WALLS DURING THEIR CONSTRUCTION
- PRIOR TO COMPLETION OF THE MACROPHYTE ZONE WEIR A TEMPORARY WEIR AND SPILLWAY SHALL BE CONSTRUCTED TO RL 6.6 IN THE GENERAL LOCATION OF THE WEIR TO DETAIN
STORMWATER. THE TEMPORARY WEIR AND SPILLWAY SHALL BE CONSTRUCTED USING SANDBAGS. ROCK (NOMINAL SIZE 300 mm DIA., MAXIMUM SIZE 500 mm DIA.) AND GEOFABRIC SHALL BE
PLACED DOWNSTREAM OF THE SPILLWAY TO PROVIDE SCOUR PROTECTION
- THE MACROPHYTE ZONE SHALL BE UTILISED AND MANAGED AS A SEDIMENT BASIN TO THE COMPLETION OF ALL CONSTRUCTION WORKS
600 mm min. - RETAINED WATER WITHIN THE MACROPHYTE ZONE SEDIMENT BASIN IS LIKLEY TO COMPRISE STORMWATER AND GROUNDWATER.
On soil, 150 mm x 100 mm - A MINIMUM 500 mm OF FREEBOARD AT THE MACROPHYTE ZONE SEDIMENT BASIN WEIR SHALL BE MAINTAINED AT ALL TIMES
trench with compacted - RETAINED WATER SHALL BE TESTED AND TREATED (IF NECESSARY)
- IF WATER QUALITY OBJECTIVES ARE MET, WATER SHALL BE DISCHARGED TO THE RF THOMSPON ENVIRONMENTAL PARK TO MAINTAIN THE REQUIRED FREEBOARD
backfill and on rock, set - WATER SHALL NOT BE DISCHARGED FROM THE SEDIMENT BASIN (MACROPHYTE ZONE) UNLESS IT SATISFIES THE WATER QUALITY OBJECTIVES
into surface concrete - ADDITIONAL SEDIMENT CONTROLS SHALL BE IMPLEMENTED AS DIRECTED BY THE SITE ENVIRONMENTAL OFFICER, SUPERINTENDANT AND/OR THE ENVIRONMENTAL CONSULTANT
WATER QUALITY MONITORING
SEDIMENT FENCE DETAIL - SAMPLING OF SEDIMENT BASIN WATER PRIOR TO DISCHARGE SHALL BE UNDERTAKEN BY THE SITE ENVIRONMENTAL OFFICER.
- SAMPLES SHALL BE ANALYSED FOR pH, TURBIDITY, DISSOLVED OXYGEN
- SAMPLES SHALL BE COLLECTED FROM LOCATIONS SHOWN ON THIS STRATEGY
- RESULTS OF ALL SAMPLING SHALL BE RETAINED AND MADE AVAILABLE FOR INSPECTION BY THE SUPERINTENDANT, ENVIRONMENTAL CONSULTANT OR COUNCIL
CORRECTIVE ACTIONS
- IF WATER QUALITY DOES NOT MEET OBJECTIVES FOR SUSPENDED SOLIDS AND TURBIDITY, THE DETAINED WATER SHALL BE TREATED WITH GYPSUM (APPROXIMATELY 30 kg PER 100 m3)
- IF WATER QUALITY DOES NOT MEET OBJECTIVES FOR pH, THE DETAINED WATER SHALL BE TREATED WITH LIME (RATE TO BE DETERMINED BY ENVIRONMENTAL CONSULTANT)
- IF WATER QUALITY DOES NOT MEET OBJECTIVES FOR DISSOLVED OXYGEN, THE DETAINED WATER SHALL BE AERATED
- IF WATER QUALITY OBJECTIVES CANNOT BE MET FOLLOWING REASONABLE TREATMENT, THE PRINCIPAL CONTRACTOR AND ENVIRONMENTAL CONSULTANT SHALL DETERMINE AN APPROPRIATE
DISPOSAL OPTION BASED ON THE QUALITY AND QUANTITY OF DETAINED STORMWATER
INSPECTION AND MAINTENANCE
- WEEKLY INSPECTIONS OF EROSION AND SEDIMENT CONTROLS SHALL BE UNDERTAKEN BY THE ENVIRONMENTAL CONSULTANT TO ASSESS THE PERFORMANCE OF CONTROLS AND ANY
MAINTENANCE REQUIREMENTS.
- DAILY INSPECTIONS OF EROSION AND SEDIMENT CONTROLS SHALL BE UNDERTAKEN AND DOCUMENTED BY THE SITE ENVIRONMENTAL OFFICER TO ASSESS PERFORMANCE, IDENTIFY FAILURES
AND DETERMINE MAINTENANCE REQUIREMENTS
- MAINTENANCE OF ALL CONTROLS SHALL BE UNDERTAKEN BY THE PRINCIPAL CONTRACTOR
RESPONSIBILITIES
DEVELOPER
- UNDERTAKE ALL NECESSARY AND REASONABLE STEPS TO ENSURE COMPLIANCE WITH THIS EROSION AND SEDIMENT CONTROL STRATEGY
SUPERINTENDANT
- REVIEW AND APPROVE EROSION AND SEDIMENT CONTROL PLAN PRIOR TO COMMENCEMENT OF WORKS
- REGULAR INPSECTIONS OF SITE TO ENSURE COMPLIANCE WITH EROSION AND SEDIMENT CONTROL PLAN AND NOTE ANY AREAS FOR IMPROVEMENT
SITE ENVIRONMENTAL OFFICER/PRINCIPAL CONTRACTOR
- DEVELOP AND IMPLEMENT EROSION AND SEDIMENT CONTROL PLAN AT SITE
- CONSTRUCT, INSTALL AND MAINTAIN EROSION AND SEDIMENT CONTROLS
- IDENTIFY AND IMPLEMENT ANY ADDITIONAL CONTROLS AS DEEMED NECESSARY
- WATER QUALITY MONITORING
- ACTION RECOMMENDATIONS PROVIDED BY THE ENVIRONMENTAL CONSULTANT AND/OR SUPERINTENDANT
SITE PERSONNEL
- MUST NOT INTENTIONALLY DAMAGE OR REMOVE ANY EROSION AND SEDIMENT CONTROLS
- REPORT ANY DAMAGE TO, OR FAILURE OF, EROSION AND SEDIMENT CONTROLS
ENVIRONMENTAL CONSULTANT
- UNDERTAKE WEEKLY INSPECTIONS OF EROSION AND SEDIMENT CONTROLS AT THE SITE AND PROVIDE A SUMMARY REPORT TO SITE ENVIRONMENTAL OFFICER
- WHERE NECESSARY PROVIDE ADVICE AND DIRECTION ON REQUIRED IMPROVEMENTS TO EROSION AND SEDIMENT CONTROL
- HOLD AN ACCREDITATION AS A CERTIFIED PROFESSIONAL IN EROSION AND SEDIMENT CONTROL (CPESC)
REVISION NOTES SCALE (@A3)
Natural Solutions accepts no responsibility for any loss or damage suffered howsoever arising to any
person or corporation who may use or rely on this plan in contravention of the terms of this clause or
0 20 40 60 80 100m
clauses (i) of (vi) hereof. 1:1000
(i) This plan has been produced for exclusive use of the client and Natural Solutions.
(ii) The contours shown are suitable only for the purpose of this plan. The accuracy of the contours
have not been verified and no reliance should be placed upon such contours for any purpose other
than for the original purpose of this plan.
Settlers Cove Wetlands - Erosion & Sediment Control Plan Sunshine Coast Office
(iii) Aerial photography and mapping has been overlaid as a best fit on the boundaries shown and PO Box 1171 TEWANTIN QLD 4565
position is approximate only.
(iv) The dimensions, area, size and location of improvements shown on this plan are approximate only
and may vary.
Cape Bouvard Developments Pty Ltd Tel: (07) 5442 4494 Fax: (07) 5442 4474
www.naturalsolutions.com.au
PROJECT MANAGER FIELDWORK BY COMPILED BY DATE JOB SHEET SIZE SHEET NUMBER DRAWING NUMBER ISSUE
(v) Scale shown is correct for the original plan and any copies of this plan should be verified by
checking against the bar scale.
(vi) This plan may not be photocopied unless this note is included. SD LT MWD 15/07/2008 J07-071-02 A3 1 OF 1 J07-071-03 -
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