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 15 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 15 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        A total of 9 sets of 6 x Leq(5min) measurements were taken in the evening-time (i.e. 1900 to 2300 hours) at all three monitoring stations during the reporting period and no exceedances were recorded.

7.2.3        A total of 9 sets of 4 x Leq(5min) measurements were taken in the night-time (i.e. 2300 to 0700 next day) at all three monitoring stations during the reporting period and no exceedances were recorded.

7.2.4        A total of 10 sets of 6 x Leq(5min) measurements were taken in public holidays (i.e. 0700 to 1900 hours during holidays) at all three monitoring stations 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        Two water samples were taken on 21st March 2006 by CHEC at P1-SA1 Part 1. The water samples were subsequently tested by a HOKLAS accredited laboratory and the results indicated that the quality of water discharged were well within the acceptable discharge limits. The next water sampling is schedule for April 2006 for area P1-SA1 Part 1. 

7.3.3        For area P1-SA1 Part 2, the discharge points were drought during the last reporting period. Therefore, water sample was taken on 21st March 2006 at P1-SA1 Part 2 by CHEC and the results indicated that the quality of water discharged were well within the acceptable discharge limits. 

7.4              Waste Management

7.4.1        Waste generated from the Phase 1 Contract included construction and demolition (C&D) materials and chemical waste. CHEC’s handling and disposal of waste has followed the recommended procedures stipulated in the Waste Management Plan (WMP) which was approved by EPD (EPD ref. (45) in EP2/N3/A/28 VII dated 10th September 2002).

7.4.2        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.

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

7.4.4        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)

471 no. of Trucks

Tuen Mun Fill Bank

2,826m3

(2,820m3 to Tuen Mun Area 38 & 6m3 to TKO Sorting Facilities)

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

107.42 tones (SENT)

Collected by licensed collector for disposal to SENT and WENT landfills

107.42 tones

N/A

Chemical waste

1,436 liters

(spent oil) &

60kg

(contaminated soil)

Collected by licensed chemical waste collector

1,436 liters

(spent oil) &

60kg

(contaminated soil)

N/A

 

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 detail 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.              Stagnant water / sediment / debris / sand were accumulated in the drainage systems at areas P1-SA1 Part 2 (Pier E5 and E10(M)) and P1-SA8 (near  Pier H5). 

Corrective and Preventive Actions – The u-channels and catchpits had been cleared immediately after the site inspections.  In addition, all temporary drainage and runoff control systems had been maintained properly on a weekly basis.  Completed and closed. (Please refer to Appendix Q, Photo 1 to 4).

ii.            Oil stain on the ground and oily water in the drip tray were observed at P1-SA1 Part 1, P1-SA1 Part 2 (near Kinko Office and near Pier NSB 25) and P1-SA6 (next to STP and Bus Depot). 

Corrective and Preventive Actions - The oily water, oil stain and contaminated soil had been cleared as chemical waste and temporarily stored in the Chemical Waste Storage Area on site at P1-SA6 (Bus Depot).  Completed and closed. (Please refer to Appendix Q, Photo 5 to 9). 

iii.           Rubbish accumulated at P1-SA1 Part 1 and in the u-channel at P1-SA6 (Bus Depot). 

Corrective and Preventive Actions – Rubbish in the concerned areas had been cleaned immediately after site inspections.  Completed and closed.  (Please refer to Appendix Q, Photo 10 and 11). 

iv.          As the wet season is approaching, CHEC was reminded that all surface runoff should be properly treated before discharge to existing storm drains and the maintenance procedure should be carried out in accordance with the Environmental Permit. 

Corrective and Preventive Actions – All temporary systems and wastewater treatment facilities have been maintained properly on a weekly basis. In addition, 4 submersible pumps had been installed for the drainage system at P1-SA1 Part 2 and hydroseeding had been applied for the stockpile at P1-SA1 Part 1.  The provided measures are effective. (Please refer to Appendix Q, Photo 12 and 13). 

Independent Environmental Checker (IEC) Site Audits

7.5.3        The monthly IEC audit was carried out on 23rd March 2006 and IEC was in general satisfied with the environmental mitigation measures that CHEC had been carried out on site. Hence no major observations or Non-compliances (NC) were raised.  However, CHEC was reminded that all surface runoff to be generated within the construction site areas during the forthcoming wet season shall be properly treated to avoid substandard discharge into existing storm drains. CHEC has carried out preventive / mitigation measures to rectify this issue.

Environmental Protection Department (EPD) Site Inspections

7.5.4        No EPD site inspections were carried out during the reporting period.