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CHANGE - Engineering Plans
Original PDF page 7, section 1. The text section number identifies this passage in the reader.
SEDIMENT RELEASE GUIDELINES a. TEMPORARY DRAINAGE CONTROL FLOWS SHOULD BE
DIVERTED AROUND THE WORK SITE WHERE POSSIBLE.
1. ALL RELEASES OF STORMWATER CAPTURED ONSITE, UNLESS b. ALL DRAINAGE, EROSION AND SEDIMENT CONTROLS TO BE
OTHERWISE NOTED IN THIS STANDARD, MUST NOT EXCEED THE INSTALLED AND BE OPERATIONAL BEFORE COMMENCING
FOLLOWING LIMITS: UP-SLOPE EARTHWORKS.
· 50mg/L OF TOTAL SUSPENDED SOLIDS (TSS) AS A MAXIMUM c. IN AREAS WHERE RUNOFF TURBIDITY IS TO BE CONTROLLED,
CONCENTRATION; EXPOSED SURFACES TO BE EITHER MULCHED, COVERED
· TURBIDITY (NTU) VALUE LESS THAN 10% ABOVE BACKGROUND; WITH EROSION CONTROL BLANKETS OR TURFED IF
· pH VALUE MUST BE IN THE RANGE 6.5 TO 8.5 EXCEPT WHERE, EARTHWORKS ARE EXPECTED TO BE DELAYED FOR MORE
AND TO THE EXTENT THAT, THE NATURAL RECEIVING WATERS THAN 14 DAYS.
LIE OUTSIDE THIS RANGE.
2. THE CONCENTRATION OF TSS RELEASED BY DEWATERING MAY SEDIMENT FENCE
ONLY EXCEED 50mg/L WHERE IT CAN BE DEMONSTRATED AND 10. FOR SEDIMENT FENCE STANDARD DETAIL AND SPECIFICATION
SUPPORTED THROUGH DOCUMENTATION THAT: REFER TO INTERNATIONAL EROSION CONTROL ASSOCIATION
· FURTHER SIGNIFICANT RAINFALL IS FORECAST TO OCCUR AUSTRALASIA (IECA) BEST PRACTICES STANDARD DRAWINGS
BEFORE THE TSS CONCENTRATION IS LIKELY TO BE REDUCED SF-01 AND SF-02 SEDIMENT FENCE.
TO 50m TEMPORARY CONSTRUCTION ENTRY/EXIT
· g/L; 11. FOR CONSTRUCTION ENTRY / EXIT STANDARD DETAIL AND
· RELEASING A HIGHER CONCENTRATION OF TOTAL SUSPENDED SPECIFICATION REFER TO INTERNATIONAL EROSION CONTROL
SOLIDS WILL RESULT IN A BETTER ENVIRONMENTAL OUTCOME ASSOCIATION AUSTRALASIA (IECA) BEST PRACTICES STANDARD
BY PROVIDING STORAGE FOR THE CAPTURE AND TREATMENT OF DRAWINGS EXIT-01 AND EXIT-02 CONSTRUCTION EXIT - ROCK
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RUN-OFF FROM THE IMMINENT RAINFALL AND RUN-OFF. PAD (CONSTRUCTION SITES ONLY), EXIT-03 - ROCK PADS FOR
· ALL REASONABLE AND PRACTICABLE STEPS HAVE BEEN TAKEN BUILDING SITES AND EXIT-04 AND EXIT-05 CONSTRUCTION EXIT -
PP TO TREAT THE WATER WITHIN BEST-PRACTICE TIME FRAMES; VIBRATION GRID.
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· FLOCCULENT HAS BEEN APPROPRIATELY APPLIED AND THE KERB INLET
CONCENTRATION OF TSS IN THE CAPTURED WATER HAS 12. FOR KERB INLET STANDARD DETAIL AND SPECIFICATION REFER
PROVIDE TEMPORARY
ALREADY SIGNIFICANTLY DECREASED. TO INTERNATIONAL EROSION CONTROL ASSOCIATION
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CONSTRUCTION ENTRY/EXIT.
3. FOR ALL OTHER STORMWATER RELEASES, FLOWS AND AUSTRALASIA (IECA) BEST PRACTICES STANDARD DRAWING
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REFER C031 FOR DETAIL 120 | S| DISCHARGES FROM THE SITE, THE RELEASE LIMIT PRESCRIBED ESC-03 KERB INLET SEDIMENT TRAPS
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O/H E
IN (1A) ABOVE MUST NOT BE EXCEEDED UNLESS THE REVEGETATION
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/ DEVELOPMENT IS IN FULL COMPLIANCE WITH THIS STANDARD. 13. FOR REVEGETATION STANDARD SPECIFICATION REFER TO
|S| INTERNATIONAL EROSION CONTROL ASSOCIATION AUSTRALASIA
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SEDIMENT CONTROL (IECA) BEST PRACTICES STANDARD DRAWING R-01
|S| 1. ALL SEDIMENT AND EROSION CONTROL MEASURES TO BE IN REVEGETATION GENERAL.
12 ACCORDANCE WITH INTERNATIONAL EROSION CONTROL FIELD INLET
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6 PP ASSOCIATION (IECA) AUSTRALIA GUIDELINES AND THE 14. FOR FIELD INLET STANDARD DETAIL AND SPECIFICATION REFER
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|S| SPECIFICATIONS. TO INTERNATIONAL EROSION CONTROL ASSOCIATION
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2. SEDIMENT AND EROSION CONTROL DETAILS SHOWN ARE AUSTRALASIA (IECA) BEST PRACTICES STANDARD DRAWING
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.8 PROVIDE TEMPORARY MINIMUM REQUIREMENTS. IT IS THE CONTRACTORS ESC-02 GRATED STORMWATER (FIELD) INLET SEDIMENT TRAP.
SEDIMENT FENCE. RESPONSIBILITY TO INSTALL ADDITIONAL CONTROL MEASURES OPERATION AND MAINTENANCE
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REFER C031 FOR DETAIL AS DEEMED NECESSARY THROUGHOUT CONSTRUCTION. 15. IN ACCORDANCE WITH NC ESC GUIDELINES, ALL ESC MEASURES
.0 3. THE CONTRACTOR IS RESPONSIBLE TO MAINTAIN ALL SEDIMENT SHALL BE INSPECTED: · AT LEAST DAILY (WHEN WORK IS
O/H E
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CONTROL DEVICES IN A FUNCTIONAL ORDER AND REPLACE ALL OCCURRING ON SITE) OR WEEKLY (WHEN WORK IS NOT
BLOCKED SEDIMENT DEVICES AS REQUIRED UNTIL SUCCESSFUL OCCURRING ON SITE) · WITHIN 24 HOURS OF EXPECTED RAIN;
OFF MAINTENANCE OF WORKS. AND · WITHIN 18 HOURS OF A RAINFALL EVENT (I.E. AN EVENT OF
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.2 4. CONSTRUCTION OF ALL SEDIMENT MANAGEMENT DEVICES TO SUFFICIENT INTENSITY AND DURATION TO MOBILISE SEDIMENT
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THE SATISFACTION OF THE SUPERINTENDENT. SHALL BE ON SITE).
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COMPLETED AND EFFECTIVE PRIOR TO: 16. IN ACCORDANCE WITH NC ESC GUIDELINES, MAINTENANCE OF
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a. STRIPPING OF TOPSOIL AND GRASS. ESC MEASURES SHALL OCCUR IN ACCORDANCE WITH THE
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b. BULK EARTHWORKS TO THE SITE. FOLLOWING TABLE:
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121 c. SERVICES INSTALLATION.
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11 d. PAVEMENT CONSTRUCTION
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MAINTENANCE SCHEDULE
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5. ALL SEDIMENT MANAGEMENT MEASURES ARE TO REMAIN IN
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PLACE UNTIL INSTRUCTION IS RECEIVED IN WRITING FROM THE
O/H E
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SUPERINTENDENT TO REMOVE ALL OR PART OF THE SILT TIMEFRAME FOR
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MAINTENANCE
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ESC MEASURES COMPLETION OF
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CONTROL APPLICATIONS. TRIGGER
8.
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MAINTENANCE
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6. THE BULK EARTHWORKS AND SEDIMENT CONTROL LAYOUT PLAN
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SHALL BE READ IN CONJUNCTION WITH THE APPROVED
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WHEN SETTLED
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6.
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DRAWINGS.
|S| SEDIMENT EXCEEDS
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.8 7. PRIOR TO COMMENCEMENT OF CONSTRUCTION APPROVAL IS TO SEDIMENT BASIN WITHIN 7 DAYS OF
121 THE VOLUME OF THE
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BE OBTAINED FROM THE SUPERINTENDENT FOR THE LOCATION (WHERE UTILISED) THE INSPECTION
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|S| SEDIMENT STORAGE
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S OF THE SITE ACCESS POINT AND WASH DOWN AREA WHICH ARE ZONE
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|S| TO BE MAINTAINED THROUGHOUT THE CONSTRUCTION PERIOD.
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8. IF SEDIMENT AND EROSION CONTROL DEVICES HAVE BEEN 1/3 OF THE CAPACITY
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.0 FOUND TO BE DIFFERENT OR FAILED IN SERVICE, CORRECTIVE OTHER ESC BY THE END OF THE
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OF ESC MEASURES IS
DAY
ACTION IS TO BE UNDERTAKEN IMMEDIATELY WHICH MAY
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EXCEEDED
INCLUDE AMENDMENTS' ADDITIONS TO THE ORIGINAL APPROVED
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EROSION CONTROL PLANS. SUCH AMENDMENTS ARE TO BE
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REPORTING
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APPROVED BY SUPERINTENDENT, IF DEEMED NECESSARY AND
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119.6
17. CONTRACTOR IS TO PROVIDE AN UPDATED PROGRAM OF ESC
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RELEVANT.
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MAINTENANCE AND CONTROL OF ALL STAGES OF WORK FOR
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4 APPROVAL BY THE SUPERINTENDENT.
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