OPW 15-0099 RFI Response combined scan

 

   
  
   
 
 
 
    
  
 
 
 
 
 
 
 
 
   
   
 
 
  
   
 
   
 
 
  
 
   

EROSION AND SEDIMENT CONTROL NOTES: SEDIMENT BASIN NOTES:

 

  

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  
 
 
 
    

 

 

     
 

     

 

 

 

 

     
  
 
  
    
 
  
   
  

 

 

     
  

 

 

 

 

   
   
  

  
  
  

 

 

 

 

 

  

 

 

 

 

4. THE CONTRACTOR IS TO TAKE ALL NECESSARY PRECAUTIONS TO CONTROL AND MINIMISE EROSION AND 1, SEDIMENT BASIN CONSTRUCTION AND MAINTENANCE TO BE IN ACCORDANCE WITH SOIL EROSION AND SEDIMENT PROVIDE SECURED
DOWNSTREAM SEDIMENTATION DURING ALL STAGES OF CONSTRUCTION INCLUDING THE MAINTENANCE PERIOD. CONTROL - ENGINEERING GUIDELINES FOR GLD CONSTRUCTION SITES - IEA QLD; AS PER NOOSA SHIRE COUNCIL GEOFABRIC TO INVERT AND
2, NOTWITHSTANDING THE DESIGN SHOWN ON THE DRAWINGS, THE CONTRACTOR IS RESPONSIBLE TO PSPOS CLAUSE 5.2. BATTERS AT BASIN INLETS.
IMPLEMENT SEDIMENT CONTROL DEVICES USING BEST PRACTICES AS NECESSARY TO MINIMISE THE 2. FOR THE ENTIRE EMBANKMENT AREA STRIPPING OF VEGETATION AND ANY HIGHLY ORGANIC TOP SOILS AND
QUANTITY OF SEDIMENT LEAVING THE SITE. ANY SOFT CLAYS TO DEPTHS OF APPROXIMATELY 0.3m IS REQUIRED. a
3. SOME VARIATIONS TO THE SPECIFIED CONSTRUCTION SEQUENCE MAY BE NECESSARY IN CERTAIN AREAS TO 3. THE STRIPPED SURFACE IS TO BE INSPECTED AND TESTED BY A GEOTECHNICAL ENGINEER. —__
FACILITATE CONSTRUCTION. WHERE THIS IS THE CASE, ANY VARIATION MUST BE APPROVED BY THE 4, SUBJECT TO THE GEOTECHNICAL ENGINEER INSPECTION EXCAVATION OF A CUTOFF KEY ALONG THE Ket
SUPERINTENDENT PRIOR TO IMPLEMENTATION. EMBANKMENT CENTERLINE AT LEAST 0.5m - 1.0m INTO THE FOUNDATION MATERIALS SHALL BE REQUIRED.
4. AT ALL TIMES THE CONTRACTOR SHALL MONITOR THE PREVAILING WEATHER CONDITIONS AND PROTECT 5. THE CLAY FILLING FOR THE BASIN SHOULD BE PLACED IN HORIZONTAL LAYERS OF 200mm THICKNESS AND BASE
ANY DOWNSTREAM CONSTRUCTION GULLY INLETS. COMPACTED TO A DENSITY RATIO WITHIN THE RANGE 98% - 102% STANDARD COMPACTION (AS 1289.5.1.11. ‘WIDTH
5, CLEARING OF SITE AND STOCKPILE SITE TO BE DETERMINED ON SITE BY SUPERINTENDENT AND IS TO BE CLEAR OF PLACEMENT MOISTURE CONTENTS SHOULD BE WITHIN THE RANGE OMC - 1% TO OMC + 2% (WHERE OMC =
ANY WATER COURSE. OPTIMUM MOISTURE CONTENT FOR STANDARD COMPACTION),
6. WHERE POSSIBLE PROVIDE CUT-OFF DRAINS TO DIVERT CLEAN WATER FROM UNDISTURBED CATCHMENT. 8. WATER QUALITY SAMPLES MUST BE TAKEN AND ANALYSED PRIOR TO THE RELEASE OF ANY WATER FROM TYPICAL DIVERSION DRAIN DETAIL
7. ALL PERINETER BANKS/SWALES SHALL HAVE UNINTERRUPTED POSITIVE GRADE TO AN OUTLET. THE SEDIMENT BASINS. WATER QUALITY MUST SATISFY THE FOLLOWING CRITERIA: TSS < SOmg/L, PH NTS,
8. CONSTRUCT WASH DOWN BAY OR SHAKE DOWN AT ENTRY/EXIT TO COUNCIL STANDARDS AND TO THE BETWEEN 6.5 AND 8.5 AT ALL TIMES, RESULTS ARE REQUIRED TO BE FORWARDED TO SUPERINTENDENT
SATISFACTION OF COUNCIL'S LICENSING AND COMPLIANCE OFFICER. WITHIN 48 HOURS OF SAMPLING. DRAIN TYPE | BASE WIDTH | DEPTH MIN-SLOPE
9. THE EXTENT OF GRASSING OR HYDROMULCHING BE DETERMINED BY THE ENGINEER AND SHALL BE SEEDED, 9. ALL WATER QUALITY SAMPLES DATA INCLUDING DATES OF RAINFALL, DATES OF TESTING AND WATER DI-A Om 0.5m 0.5%
AS SPECIFIED, WITHIN SEVEN DAYS OF FINAL TRIMMING. RELEASE, MUST BE MAINTAINED IN AN ON-SITE REGISTER. THIS REGISTER IS TO BE MAINTAINED FOR THE D1-B om 0.5m 0.5%
10. THE CONTRACTOR SHALL BE RESPONSIBLE FOR COMPLYING WITH COUNCIL’S REQUIREMENTS IN RELATION TO DURATION OF THE APPROVED WORKS, AND BE AVAILABLE FOR INSPECTION BY COUNCIL OFFICERS ON REQUEST. D2-A 8.5m 0.5m 8.5%
GRASS STRIKE AND GRASS COVERAGE RATES AT THE ON AND OFF MAINTENANCE INSPECTIONS. 10. FLOCCULATION AGENT FOR TYPE ‘D‘ BASIN SHALL BE GYPSUM DOSED AT ABOUT 32kg/100Cum. CONTRACTOR pe8 on 8.5m a
1 ALL MATERIALS TRACKED OR SEDIMENT WASHED ONTO COUNCIL'S ROAD FROM THE DEVELOPMENT ARE TO TO HAVE SUPPLY OF FLOCCULATION AGENT AVAILABLE ON SITE. a a 230 ie
BE BROOMED UP AND COLLECTED. 11. FLOCCULATION, TESTING AND DEWATERING IN A NON-EROSIVE MANNER SHALL BE COMPLETED WITHIN S Da8 in ten a
12. ALL SEDIMENT CONTROL DEVICES SHALL BE MONITORED, CLEANED AND/OR REPAIRED WHENEVER THE BUSINESS DAYS FROM A RUN-OFF INCLUDING RAIN EVENT. ANY WATER DISCHARGED FROM THE SEDIMENT D5sA 15m Dem 1%
CAPACITY OF THE EROSION AND SEDIMENT CONTROL MEASURE FALLS BELOW 75%. BASIN AND RELEASED OFF-SITE MUST ACHIEVE THE WATER QUALITY CRITERIA PRIOR TO BEING RELEASED SB tm Dem 15%
73. ALL EROSION AND SEDIMENT CONTROL MEASURES SHALL BE INSPECTED AT LEAST DAILY (WHEN WORK IS FROM THE SITE. :
OCCURRING ON SITE) OR WEEKLY (WHEN WORK IS NOT OCCURRING ON SITE). WITHIN 24 HOURS OF 12. ALL REASONABLE AND PRACTICAL MEASURES SHALL BE TAKEN TO DIRECT STORMWATER TO SEDIMENT BASINS
EXPECTED RAIN AND WITHIN 18 HOURS OF A RAINFALL EVENT AS REQUIRED TO MAINTAIN CONTROL USING CONTOURED CATCH DRAINS.
DEVICES. 33. WHERE REQUIRED DURING ROAD CONSTRUCTION, SUITABLE GAPS IN THE KERB SHALL BE LEFT IN ORDER TO
14. ALL TEMPORARY EROSION AND SEDIMENT CONTROL (ESC) MEASURES ARE TO BE MAINTAINED AND FULLY ALLOW DIVERSION DRAINS AND THE PLACEMENT OF SAND BAGS ACROSS THE ROAD WIDTH TO DIVERT HN LeNGry BERM {0.3m
OPERATIONAL DURING THE MAINTENANCE PERIOD, AND ARE TO BE REMOVED AFTER THE SATISFACTORY SURFACE FLOWS TO TEMPORARY SEDIMENT BASINS. 5.0m/ MIN HIGH)
COMPLETION OF AN ‘OFF MAINTENANCE’ INSPECTION AND PRIOR TO FORMAL ACCEPTANCE BY COUNCIL. 14. BASINS INLETS SHALL BE PROTECTED FROM EROSION AND SCOUR BY IMPLEMENTING ROCK OR GEOTEXTILE
45. NO OBSTRUCTIONS SHALL BE PLACED ON COUNCIL'S PUBLIC ROADS OR GULLY PITS FOR SAFETY REASONS. LINED CHUTES.
45. A PRIMARY OUTLET/EMERGENCY SPILLWAY SHALL BE IMPLEMENTED ON EACH SEDIMENT BASIN TO
ACCOMMODATE A 20-YEAR ARI. GEOTEXTILE
SEDIMENT MANAGEMENT PROGRAM: 16. SEDIMENT BASINS EMERGENCY SPILLWAYS, SPILLWAY CHUTES AND OUTLET CHANNELS FROM THE SEDIMENT FABRIC YZ
1. CLEARING BASINS SHALL BE ADEQUATELY STABILISED AGAINST EROSION/SCOUR AND REMAIN STRUCTURALLY STABLE
= INSTALL APPROPRIATE SAFETY FENCING AND SIGNAGE. UP TO AND INCLUDING THE A 20-YEAR ARI RAIN EVENT”. A RUNOFF FROM PAD DIRECTED
~ SEDIMENT FENCE, SEDIMENT BASINS AND DIVERSION DRAINS TO BE CONSTRUCTED AS REQUIRED. 17. ALL BASINS TO BE SURROUNDED BY TEMPORARY SAFETY FENCING AND WARNING SIGNS SHALL BE ERECTED TO SEDIMENT TRAP GRAVEL
- EXISTING GRASSED AREAS TO REMAIN WHERE POSSIBLE, SURROUNDING THE BASIN AND STEEP, INTERNAL SLOPES SHALL BE AVOIDED.
- SHAKE DOWN/WASH DOWN BAY AT NOMINATED ENTRY/EXIT POINT ON TRADING POST ROAD AS REQUIRED.
- CONSTRUCT UPSTREAM CLEAN WATER DIVERSION DRAINS x DIVERSION DRAIN TEMPORARY CONSTRUCTIGN EXIT WASHDOWN DEVICE
- SUPERINTENDENT TO CONFIRM EXTENT OF CLEARING TO CONTRACTOR PRIOR TO COMMENCEMENT OF WORKS. REMOVE FABRIC BETWEEN PROVIDE SECURED GEOFABRIC TO INVERT NTS.
- REFER ALSO TO VEGETATION MANAGEMENT PLAN. STEEL PICKET IN SAGS x AND BATTERS AT BASIN INLETS.
2. EARTHWORKS E ™— T7177
- SEDIMENT FENCES AND DIVERSION DRAINS TO BE CONSTRUCTED AS REQUIRED 5m? LOOSE PLACED Os PT Ty]
3. STOCKPILE an, ROCK NOMINAL 200mm@ 4
- SEDIMENT FENCE TO BE ERECTED Sm FROM TOE OF BATTER ON LOW SIDE OF STOCKPILE. th \ N on
- CUT OFF DRAIN ON HIGH SIDE TO DIRECT SURFACE RUNOFF AROUND STOCKPILE. WY ~]
4, MAINTENANCE PERIOD TYPICAL i
- ALL EROSION AND SEDIMENT CONTROL MEASURES SHALL BE INSPECTED: SAND BAGS BOTH SIDES SEDIMENT BASIN
- AT LEAST DAILY {WHEN WORK IS OCCURRING ON SITE) OR WEEKLY (WHEN WORK IS NOT OCCURRING ON SITE) MESH OR GEOFABRIC: OF OVERFLOW PATH DIVERSION DRAIN (SIZE AS DS
~ WITHIN 24 HOURS OF EXPECTED RAIN; AND ON GROUND TO EXTEND TO BACK OF NOMINATED) OVERFLOW WEIR
~ WITHIN 18 HOURS OF A RAINFALL EVENT REDUCE EROSION PAVEMENT BOX _____t WIDTH AS SPECIFIED
= ALL EROSION AND SEDIMENT CONTROL MEASURES SHALL BE MAINTAINED THE SAME DAY WHEN THE CAPACITY > Ss
OF THE EROSION AND SEDIMENT CONTROL MEASURE FALLS BELOW 75%. SPILL THROUGH WEIR DETAIL a GN LAYOUT PLANS | 10P OF BANK
- ANY REPAIRS TO EROSION AND SEDIMENT CONTROL DEVICES ARE TO BE EFFECTED IMMEDIATELY. SEDIMENT INSTALL AT ALL SAG POINTS IN SILT FENCES Look bb ob IS ‘
AFTER RAIN IS TO BE CLEANED FROM STREETS AND ALLOTMENTS IMMEDIATELY AND CORRECTIVE ACTION TAKEN
TO AVOID A RE-OCCURRENCE OF THE FAILURE.
SEDIMENT CONTROL FABRIC TO BE POSTS AT NOMINAL 2.0m TYPICAL SEDIMENT BASIN EXTEND SANDBAGS TO GEOTEXTILE ROCK LINED BASE,
CONSTRUCTION SEQUENCE: ‘PROPEX’ OR SIMILAR APPROVED CTRS TO BE STEEL PICKET NTS. BATTER EXTENTS 300mm THICK,
A. CONSTRUCT ENTRY AND EXIT POINT TOGETHER WITH SHAKE DOWN DEVICE ON TRADING POST ROAD. EGE EDGE —10_BE SUITABLY, OR 50 x 50 HARDWOOD SIZE Dse = 200mm.
B. ERECT SEDIMENT FENCES ALONG DOWNSTREAM ADJACENT PROPERTY BOUNDARIES. PLACE BARRIER FENCES SUPPORTED BETWEEN POSTS SECTION (AY
AROUND LOTS OR AREAS THAT DO NOT REQUIRE DISTURBANCE TO ENSURE AREAS REMAIN UNDISTURBED. NS. \-A
C. CONSTRUCT CLEAN WATER DIVERSION SWALES TO ENSURE UPSTREAM RUNOFF IS DIVERTED AROUND THE SITE. 2 WIE
ALL DIVERSION SWALES ARE TO BE CONSTRUCTED PRIOR TO ANY EARTHWORKS OPERATIONS, 3 PROVIDE SMALL UPSTREAM
D, CLEARING, GRUBBING AND EARTHWORKS OF SEDIMENT BASIN AREAS ONLY. 2 a ane ‘ €|")
E. CONSTRUCT TEMPORARY SEDIMENT BASINS, WITH NON-DISPERSIVE MATERIAL, SPILLWAY, AND OTHER < (2-3m) AT 30m
ASSOCIATED WOEKS, 2 MAX, SPACINGS ALONG FENCE
F. CONSTRUCT DIVERSION DRAINS DIRECTING DIRTY WATER INTO SEDIMENT BASINS. 1 Lt 25 PREVENT WATERTGE PAGE
G. CLEARING, GRUBBING AND STRIPPING FOR THE REMAINDER OF THE SITES EARTHWORKS AREAS. DIRECT “l 22 ALAS SPECED .
RUN-OFF TO SEDIMENT BASINS. 200 x 200 7 &
H. UNDERTAKE EARTHWORKS OPERATIONS.. TRENCH a CREST
| ERECT SEDIMENT FENCES TO LOTS. — li
J. PLACE SEDIMENT FENCES AT BOUNDARIES ADJACENT TO ROADWAYS WHERE LOT SLOPES TOWARDS ROAD. SEDIMENT FENCE DETAIL Pee Fa ae by
K. TOPSOIL AND GRASS SEED ALL REMAINING LOTS FOLLOWING PROGRESSIVE COMPLETION OF EARTHWORKS IF NTS. sr

  

DIRECTED BY SUPERINTENDENT.
L. ON COMPLETION OF WORKS AS STATED ABOVE, ESTABLISHMENT OF 70% GRASS COVER AND APPROVAL BY
Sree REMOVE SEDIMENT BASIN, ev Lies AND halngrtne AREAS. GRASS SEED IMMEDIATELY.

NOTE:
SEDIMENT BASINS TO HAVE CHILD
RESTRAINT FENCING FOR DURATION OF USE

 
    
 

 

 

EoMPeTe REMAINING EARTHWORKS OPERATIONS TO AREAS nee SEDIMENT BASINS AND DIVERSION
DRAINS HAVE BEEN REMOVED. ENSURE ADEQUATE SEDIMENT FENCES ARE PLACED DOWNSTREAM OF
ALL WORKS.

ph x
LEVEL so J
NOTE:

BASIN LEVELS ARE A GUIDE ONLY AND ARE TYPICAL TEMPORARY SEDIMENT BASIN (TYPE D)
TO BE CONFIRMED ON SITE TO SUIT BEST
WITH NATURAL TERRAIN. CONTRACTOR TO
ENSURE MINIMUM VOLUMES ARE ACHIEVED.

 
 
 

   
 

 

 

 

 

 

FILE: Sam Bi DATE: 31-07-206 THE: 141

REF NO. 132007.2398.02

 

 

 

 

 

 

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