7                    AUDIT RESULTS

7.1              Air Quality

7.1.1        For 1-hour TSP monitoring, a total of 45 sets of measurement were carried out at ASR1, ASR2 and ASR3 during the reporting period and the results of all measurements taken were below the A/L Levels. 

7.1.2        For 24-hour TSP monitoring, a total of 18 sets of measurement were carried out at ASR1, ASR2 and ASR3 during the reporting period and the results of all measurements taken were below the A/L Levels. 

7.2              Noise

7.2.1        A total of 12 sets of Leq(30min) measurement were taken in the daytime (i.e. 0700 to 1900 hours on normal weekdays) at three monitoring stations (NSR1, NSR2 and NSR3) during the reporting period and no exceedances were recorded.

7.2.2        Since no construction works were undertaken during evening and night-time, therefore no noise monitoring was carried out for these periods during the reporting month.

7.2.3        A total of 4 set of 6 x Leq(5min) measurements were taken in public holidays (i.e. 0700 to 1900 hours during holidays) at the closest monitoring station (NSR2) and no exceedances were recorded.

7.3              Water Quality

7.3.1        A total of 3 Effluent Discharge Licenses were granted by EPD.  In accordance with the conditions of the licenses, water sampling at designated discharge points shall be carried out on a monthly basis for area P1-SA1 (Part 1) (Grid 1 to 9) and on a quarterly basis for areas P1-SA1 (Part 2) (Grid 10 to 27, Container Port Road E/B), P1-SA6, P1-SA8 and P1-SA11.

7.3.2        Four water samples were taken for the whole site by CHEC on 28th May 2007. The water samples were subsequently tested by a HOKLAS accredited laboratory and the results indicated that they have fully complied with the Specific Condition as stipulated in the approved license. In addition, pH and COD were also analyzed and the results also complied with the limits stipulated in the approved licenses.

7.3.3        Two water samples were taken for P1-SA1 (Part 1, Grid 1 to 9) by CHEC on 29th June 2007. The results of the water samples will be reported in the next EM&A monthly report.  The next sampling is scheduled for July 2007 for P1-SA1 (Part 1, Grid 1 to 9).

7.4              Waste Management

7.4.1        The Waste Management Plan (WMP) was approved by EPD on 10th September 2002. (EPD ref. (45) in EP2/N3/A/28 VII).

7.4.2        A revised WMP (Rev. 20) was submitted to EPD for information on 26th June 2007 with the latest information including the most up to date estimation of inert C&D materials and non-inert C&D materials.

7.4.3        With effect from 6th February 2005, all inert C&D material had been disposed of at Tuen Mun Fill Bank. The trip ticket system has been implemented effectively during the reporting period.

7.4.4        On 7th December 2005, approval was granted by PFC, CEDD to import a maximum of 3,000m3 of soft material from “HY2002/26 – Stonecutters Bridge” for re-usage purposes.  A total of 2,004 m3 of soft material were delivered from HY2002/26 to Phase 1 Contract since December 2005.

7.4.5        Based on the information provided by CHEC with respect to relevant handling records and trip tickets of the Phase 1 Contract, the quantities of materials reused, recycled and disposed of are summarized in Table 7.1.

Table 7.1 Summary of Waste Disposal during the Reporting Period

Material Type

Quantity Produced in the reporting period

Handling Method

 

Handling Quantities in the reporting month

Temporary Storage Locations On-site

(if applicable)

C&D materials

 

 

 

 

 

(Public Fill)

505 no. of Trucks

 

Tuen Mun Fill Bank

(Tuen Mun Area 38)

Approx. 2,273m3

N/A

(C&D

Waste)

N/A

To be recycled (paper)

N/A

P1-SA9

N/A

To be recycled (aluminum can)

N/A

P1-SA9

N/A

To be recycled (plastic bottle)

N/A

P1-SA9

N/A

To be reused

N/A

P1-SA6

N/A

To be returned to supplier

N/A

P1-SA6

C&D materials

 

(C&D

Waste)

189 tones (SENT)

Collected by licensed collector for disposal to SENT and WENT landfills

189 tones

N/A

Chemical waste

N/A

Collected by licensed chemical waste collector

N/A

P1-SA6

 

7.5              Site Audits / Inspections

7.5.1        Scheduled site audits were carried out by the ET and IEC on a regular basis in accordance with the EM&A Manual.  Sections below provide a detailed summary of the findings identified during these audits and their corresponding implemented corrective and preventive measures.  Photographs of implemented measures are presented in Appendix Q.

Environmental Team Site Inspections

7.5.2        Weekly site inspections were conducted by the ET during the reporting period and the major findings are summarized as follows:

i.           No wheel washing facilities were provided at the vehicular exit points at areas P1-SA6 (Container Port Road South) and P1-SA1 (Part 2, ramp F).

Corrective and Preventive Actions – All concerned vehicular exit points had been closed.  Completed and closed.  (Please refer Appendix Q, Photo 01).

ii.          Mosquito larvae were found in stagnant water within the pre-cast concrete gullies and structural steelwork at area P1-SA1.

Corrective and Preventive Actions – CHEC reported that stagnant water had been removed as far as practical. The frequency of applying temephos/ larvicidal oil has been enhanced in order to reduce the risk of mosquito breeding.  Completed and closed.  (Please refer Appendix Q, Photo 02).

iii.        The de-sludge pipe of the Chemical Enhanced Treatment Plant (CETP) at area P1-SA6 (STP) was incorrectly connected to discharge point.

Corrective and Preventive Actions – The pipe has been disconnected immediately at the time of site inspection.  Completed and closed.  (Please refer Appendix Q, Photo 03).

iv.        The wheel washing basin was found full of stagnant water at area P1-SA6 (STP).  In addition, CHEC was reminded to deploy suitable chemical / coagulant for the CETP at P1-SA6

Corrective and Preventive Actions – The water pump for the wheel washing basin had been repaired.  Wastewater has been diverted from the basin to the CETP in order to avoid overflowing of substandard effluent into storm drain. In addition, proper chemical / coagulant has been deployed for the CETP.  Completed and closed.  (Please refer Appendix Q, Photo 04).

v.         For area P1-SA1 (Part 1), oil leakage was observed next to Luen Hing workshop).  In addition, drip trays for the generators (storage yard) were found full of oily water.

Corrective and Preventive Actions – All contaminated material and oily water had been cleared as chemical waste. Completed and closed.  (Please refer Appendix Q, Photo 05).

Independent Environmental Checker (IEC) Site Audit

7.5.3        The monthly IEC audit was carried out on 22nd June 2007, four observations were recorded and they are presented below. 

i.           No wheel washing facilities were provided at the vehicular exit point at area P1-SA1 (Part 2, ramp F).

Corrective and Preventive Actions - The concerned vehicular exit point has been closed.  Completed and closed. 

ii.          The wheel washing basin was found full of stagnant water at area P1-SA6 (STP). In addition, CHEC was reminded to deploy suitable chemical / coagulant for the CETP at P1-SA6.

Corrective and Preventive Actions - Wastewater from the basin has been diverted to the CETP in order to avoid overflowing of substandard effluent into storm drain. In addition, proper chemical / coagulant has been deployed for the CETP.  Completed and closed.  (Please refer Appendix Q, Photo 04).

iii.        Oil leakage was observed at area P1-SA1 (Part 1, next to Luen Hing workshop).

Corrective and Preventive Actions - All contaminated material had been cleared as chemical waste.  Completed and closed.  (Please refer Appendix Q, Photo 05).

iv.        Drip trays for the generators at area P1-SA1 (Part 1, storage yard) were found full of oily water.

Corrective and Preventive Actions - All oily water had been cleared as chemical waste.  Completed and closed. 

Environmental Protection Department (EPD) Site Inspections

7.5.4        A joint site inspection was carried out with EPD on 21st June 2007.  During the joint site inspection, it was noted that no NCs or observations were recorded.  However, further improvements could be adopted to enhance the current site conditions as advised by the EPD and they are highlighted as follows: 

i.           All generators located within the site area, in particular the ones on the bridge deck should be sheltered from rain water in order to prevent spilled oil/fuel from entering into storm drains.

Corrective and Preventive Actions – Shelter would be arranged for those generators located at the area where petrol interceptor was not incorporated in the drainage system.  The situation will be monitored by RSS and ET continuously.

ii.          Stagnant water was accumulated within the structural steelwork and tanks at area P1-SA1; and sedimentation tank at area P1-SA6 (STP).

Corrective and Preventive Actions – CHEC reported that stagnant water had been removed as far as practical.  The frequency of applying temephos/ larvicidal oil has been enhanced in order to reduce the risk of mosquito breeding.  Completed and closed.  (Please refer Appendix Q, Photo 02).

iii.        CHEC was advised to review the whole temporary drainage system including the set up of the Chemical Enhanced Treatment Plant (CETP) at area P1-SA6 (adjacent to DSD STP).

Corrective and Preventive Actions – Daily inspection has been carried out by CHEC in order to ensure the drainage system together with the CETP is functioning.  Completed and closed.  (Please refer Appendix Q, Photo 03).

iv.        CHEC was reminded that proper vehicle washing facilities should be provided at every designated vehicle exit point.

Corrective and Preventive Actions – Wheel washing facilities including high pressure water jet have been provided at all designated vehicle exit points.  Completed and closed.  (Please refer Appendix Q, Photo 06).

v.         Appropriate sufficient dust control measures such as water spraying should be deployed for earth work operation at area P1-SA6 (next to Bus Depot).

Corrective and Preventive Actions – Watering spraying by means of water bowser and hoses has been carried out during earth work operation at the concerned area.  Completed and closed.  (Please refer Appendix Q, Photo 07).